1 package Analysis.SSJava;
3 import java.io.BufferedReader;
4 import java.io.BufferedWriter;
5 import java.io.FileReader;
6 import java.io.FileWriter;
7 import java.io.IOException;
8 import java.util.ArrayList;
9 import java.util.Collections;
10 import java.util.Comparator;
11 import java.util.HashMap;
12 import java.util.HashSet;
13 import java.util.Iterator;
14 import java.util.LinkedList;
15 import java.util.List;
18 import java.util.Stack;
19 import java.util.Vector;
21 import IR.ClassDescriptor;
23 import IR.FieldDescriptor;
24 import IR.MethodDescriptor;
25 import IR.NameDescriptor;
28 import IR.SymbolTable;
29 import IR.TypeDescriptor;
31 import IR.VarDescriptor;
32 import IR.Tree.ArrayAccessNode;
33 import IR.Tree.AssignmentNode;
34 import IR.Tree.BlockExpressionNode;
35 import IR.Tree.BlockNode;
36 import IR.Tree.BlockStatementNode;
37 import IR.Tree.CastNode;
38 import IR.Tree.CreateObjectNode;
39 import IR.Tree.DeclarationNode;
40 import IR.Tree.ExpressionNode;
41 import IR.Tree.FieldAccessNode;
42 import IR.Tree.IfStatementNode;
44 import IR.Tree.LiteralNode;
45 import IR.Tree.LoopNode;
46 import IR.Tree.MethodInvokeNode;
47 import IR.Tree.NameNode;
48 import IR.Tree.OpNode;
49 import IR.Tree.ReturnNode;
50 import IR.Tree.SubBlockNode;
51 import IR.Tree.SwitchBlockNode;
52 import IR.Tree.SwitchStatementNode;
53 import IR.Tree.TertiaryNode;
54 import IR.Tree.TreeNode;
57 public class LocationInference {
62 SSJavaAnalysis ssjava;
65 List<ClassDescriptor> temp_toanalyzeList;
66 List<MethodDescriptor> temp_toanalyzeMethodList;
67 Map<MethodDescriptor, FlowGraph> mapMethodDescriptorToFlowGraph;
69 LinkedList<MethodDescriptor> toanalyze_methodDescList;
70 Set<ClassDescriptor> toanalyze_classDescSet;
72 // InheritanceTree<ClassDescriptor> inheritanceTree;
74 // map a method descriptor to its set of parameter descriptors
75 Map<MethodDescriptor, Set<Descriptor>> mapMethodDescriptorToParamDescSet;
77 // keep current descriptors to visit in fixed-point interprocedural analysis,
78 private Stack<MethodDescriptor> methodDescriptorsToVisitStack;
80 // map a descriptor to a naive lattice
81 private Map<Descriptor, SSJavaLattice<String>> desc2naiveLattice;
83 // map a class descriptor to a field lattice
84 private Map<ClassDescriptor, SSJavaLattice<String>> cd2lattice;
86 // map a method descriptor to a method lattice
87 private Map<MethodDescriptor, SSJavaLattice<String>> md2lattice;
89 // map a method/class descriptor to a hierarchy graph
90 private Map<Descriptor, HierarchyGraph> mapDescriptorToHierarchyGraph;
92 // map a method/class descriptor to a skeleton hierarchy graph
93 private Map<Descriptor, HierarchyGraph> mapDescriptorToSkeletonHierarchyGraph;
95 private Map<Descriptor, HierarchyGraph> mapDescriptorToSimpleHierarchyGraph;
97 // map a method/class descriptor to a skeleton hierarchy graph with combination nodes
98 private Map<Descriptor, HierarchyGraph> mapDescriptorToCombineSkeletonHierarchyGraph;
100 // map a descriptor to a skeleton lattice
101 private Map<Descriptor, SSJavaLattice<String>> mapDescriptorToSkeletonLattice;
103 // map a method descriptor to the set of method invocation nodes which are
104 // invoked by the method descriptor
105 private Map<MethodDescriptor, Set<MethodInvokeNode>> mapMethodDescriptorToMethodInvokeNodeSet;
107 private Map<MethodInvokeNode, Map<Integer, NTuple<Descriptor>>> mapMethodInvokeNodeToArgIdxMap;
109 private Map<MethodInvokeNode, NTuple<Descriptor>> mapMethodInvokeNodeToBaseTuple;
111 private Map<MethodInvokeNode, Set<NTuple<Location>>> mapMethodInvokeNodeToPCLocTupleSet;
113 private Map<MethodDescriptor, MethodLocationInfo> mapMethodDescToMethodLocationInfo;
115 private Map<ClassDescriptor, LocationInfo> mapClassToLocationInfo;
117 private Map<MethodDescriptor, Set<MethodDescriptor>> mapMethodToCalleeSet;
119 private Map<MethodDescriptor, Set<FlowNode>> mapMethodDescToParamNodeFlowsToReturnValue;
121 private Map<String, Vector<String>> mapFileNameToLineVector;
123 private Map<Descriptor, Integer> mapDescToDefinitionLine;
125 private Map<Descriptor, LocationSummary> mapDescToLocationSummary;
127 private Map<MethodDescriptor, Set<MethodInvokeNode>> mapMethodDescToMethodInvokeNodeSet;
129 // maps a method descriptor to a sub global flow graph that captures all value flows caused by the
130 // set of callees reachable from the method
131 private Map<MethodDescriptor, GlobalFlowGraph> mapMethodDescriptorToSubGlobalFlowGraph;
133 private Map<MethodInvokeNode, Map<NTuple<Descriptor>, NTuple<Descriptor>>> mapMethodInvokeNodeToMapCallerArgToCalleeArg;
135 private Map<MethodDescriptor, Boolean> mapMethodDescriptorToCompositeReturnCase;
137 private Map<MethodDescriptor, MethodDescriptor> mapMethodDescToHighestOverriddenMethodDesc;
139 private Map<MethodDescriptor, Set<MethodDescriptor>> mapHighestOverriddenMethodDescToMethodDescSet;
141 private Map<MethodDescriptor, NTuple<Descriptor>> mapHighestOverriddenMethodDescToReturnLocTuple;
143 private Map<MethodDescriptor, NTuple<Descriptor>> mapHighestOverriddenMethodDescToPCLocTuple;
145 private Map<MethodDescriptor, Set<NTuple<Descriptor>>> mapHighestOverriddenMethodDescToSetLowerThanPCLoc;
147 private Map<MethodDescriptor, Set<NTuple<Descriptor>>> mapHighestOverriddenMethodDescToSetHigherThanRETURNLoc;
149 public static final String GLOBALLOC = "GLOBALLOC";
151 public static final String INTERLOC = "INTERLOC";
153 public static final String PCLOC = "_PCLOC_";
155 public static final String RLOC = "_RLOC_";
157 public static final Descriptor GLOBALDESC = new NameDescriptor(GLOBALLOC);
159 public static final Descriptor TOPDESC = new NameDescriptor(SSJavaAnalysis.TOP);
161 public static final Descriptor BOTTOMDESC = new NameDescriptor(SSJavaAnalysis.BOTTOM);
163 public static final Descriptor RETURNLOC = new NameDescriptor(RLOC);
165 public static final Descriptor LITERALDESC = new NameDescriptor("LITERAL");
167 public static final HNode TOPHNODE = new HNode(TOPDESC);
169 public static final HNode BOTTOMHNODE = new HNode(BOTTOMDESC);
171 public static String newline = System.getProperty("line.separator");
173 LocationInfo curMethodInfo;
175 private boolean hasChanges = false;
177 boolean debug = true;
179 public static int locSeed = 0;
181 private Stack<String> arrayAccessNodeStack;
183 private ClassDescriptor rootClassDescriptor;
185 private BuildLattice buildLattice;
187 public static int numLocationsSInfer = 0;
188 public static int numLocationsNaive = 0;
190 public LocationInference(SSJavaAnalysis ssjava, State state, TypeUtil tu) {
191 this.ssjava = ssjava;
194 this.toanalyze_classDescSet = new HashSet<ClassDescriptor>();
195 this.temp_toanalyzeList = new ArrayList<ClassDescriptor>();
196 this.temp_toanalyzeMethodList = new ArrayList<MethodDescriptor>();
197 this.mapMethodDescriptorToFlowGraph = new HashMap<MethodDescriptor, FlowGraph>();
198 this.cd2lattice = new HashMap<ClassDescriptor, SSJavaLattice<String>>();
199 this.md2lattice = new HashMap<MethodDescriptor, SSJavaLattice<String>>();
200 this.desc2naiveLattice = new HashMap<Descriptor, SSJavaLattice<String>>();
202 this.methodDescriptorsToVisitStack = new Stack<MethodDescriptor>();
203 this.mapMethodDescriptorToMethodInvokeNodeSet =
204 new HashMap<MethodDescriptor, Set<MethodInvokeNode>>();
205 this.mapMethodInvokeNodeToArgIdxMap =
206 new HashMap<MethodInvokeNode, Map<Integer, NTuple<Descriptor>>>();
207 this.mapMethodDescToMethodLocationInfo = new HashMap<MethodDescriptor, MethodLocationInfo>();
208 this.mapMethodToCalleeSet = new HashMap<MethodDescriptor, Set<MethodDescriptor>>();
209 this.mapClassToLocationInfo = new HashMap<ClassDescriptor, LocationInfo>();
211 this.mapFileNameToLineVector = new HashMap<String, Vector<String>>();
212 this.mapDescToDefinitionLine = new HashMap<Descriptor, Integer>();
213 this.mapMethodDescToParamNodeFlowsToReturnValue =
214 new HashMap<MethodDescriptor, Set<FlowNode>>();
216 this.mapDescriptorToHierarchyGraph = new HashMap<Descriptor, HierarchyGraph>();
217 this.mapMethodInvokeNodeToBaseTuple = new HashMap<MethodInvokeNode, NTuple<Descriptor>>();
219 this.mapDescriptorToSkeletonHierarchyGraph = new HashMap<Descriptor, HierarchyGraph>();
220 this.mapDescriptorToCombineSkeletonHierarchyGraph = new HashMap<Descriptor, HierarchyGraph>();
221 this.mapDescriptorToSimpleHierarchyGraph = new HashMap<Descriptor, HierarchyGraph>();
223 this.mapDescriptorToSkeletonLattice = new HashMap<Descriptor, SSJavaLattice<String>>();
225 this.mapDescToLocationSummary = new HashMap<Descriptor, LocationSummary>();
227 this.mapMethodDescriptorToSubGlobalFlowGraph = new HashMap<MethodDescriptor, GlobalFlowGraph>();
229 this.mapMethodInvokeNodeToMapCallerArgToCalleeArg =
230 new HashMap<MethodInvokeNode, Map<NTuple<Descriptor>, NTuple<Descriptor>>>();
232 this.mapMethodInvokeNodeToPCLocTupleSet =
233 new HashMap<MethodInvokeNode, Set<NTuple<Location>>>();
235 this.arrayAccessNodeStack = new Stack<String>();
237 this.mapMethodDescToMethodInvokeNodeSet =
238 new HashMap<MethodDescriptor, Set<MethodInvokeNode>>();
240 this.mapMethodDescriptorToCompositeReturnCase = new HashMap<MethodDescriptor, Boolean>();
242 mapMethodDescToHighestOverriddenMethodDesc = new HashMap<MethodDescriptor, MethodDescriptor>();
244 mapHighestOverriddenMethodDescToSetLowerThanPCLoc =
245 new HashMap<MethodDescriptor, Set<NTuple<Descriptor>>>();
247 mapHighestOverriddenMethodDescToMethodDescSet =
248 new HashMap<MethodDescriptor, Set<MethodDescriptor>>();
250 mapHighestOverriddenMethodDescToReturnLocTuple =
251 new HashMap<MethodDescriptor, NTuple<Descriptor>>();
253 mapHighestOverriddenMethodDescToPCLocTuple =
254 new HashMap<MethodDescriptor, NTuple<Descriptor>>();
256 mapHighestOverriddenMethodDescToSetHigherThanRETURNLoc =
257 new HashMap<MethodDescriptor, Set<NTuple<Descriptor>>>();
259 this.buildLattice = new BuildLattice(this);
263 public void setupToAnalyze() {
264 SymbolTable classtable = state.getClassSymbolTable();
265 temp_toanalyzeList.clear();
266 temp_toanalyzeList.addAll(classtable.getValueSet());
267 // Collections.sort(toanalyzeList, new Comparator<ClassDescriptor>() {
268 // public int compare(ClassDescriptor o1, ClassDescriptor o2) {
269 // return o1.getClassName().compareToIgnoreCase(o2.getClassName());
274 public void setupToAnalazeMethod(ClassDescriptor cd) {
276 SymbolTable methodtable = cd.getMethodTable();
277 temp_toanalyzeMethodList.clear();
278 temp_toanalyzeMethodList.addAll(methodtable.getValueSet());
279 Collections.sort(temp_toanalyzeMethodList, new Comparator<MethodDescriptor>() {
280 public int compare(MethodDescriptor o1, MethodDescriptor o2) {
281 return o1.getSymbol().compareToIgnoreCase(o2.getSymbol());
286 public boolean toAnalyzeMethodIsEmpty() {
287 return temp_toanalyzeMethodList.isEmpty();
290 public boolean toAnalyzeIsEmpty() {
291 return temp_toanalyzeList.isEmpty();
294 public ClassDescriptor toAnalyzeNext() {
295 return temp_toanalyzeList.remove(0);
298 public MethodDescriptor toAnalyzeMethodNext() {
299 return temp_toanalyzeMethodList.remove(0);
302 public void inference() {
306 // construct value flow graph
307 constructFlowGraph();
309 constructGlobalFlowGraph();
313 assignCompositeLocation();
315 calculateExtraLocations();
316 addAdditionalOrderingConstraints();
318 _debug_writeFlowGraph();
320 buildInheritanceTree();
321 calculateReturnPCLocInheritance();
323 constructHierarchyGraph();
325 addInheritanceConstraintsToHierarchyGraph();
327 debug_writeHierarchyDotFiles();
329 simplifyHierarchyGraph();
331 debug_writeSimpleHierarchyDotFiles();
333 constructSkeletonHierarchyGraph();
335 debug_writeSkeletonHierarchyDotFiles();
337 insertCombinationNodes();
339 debug_writeSkeletonCombinationHierarchyDotFiles();
341 buildLatticeInheritanceTree();
344 debug_writeLattices();
346 updateCompositeLocationAssignments();
348 generateMethodSummary();
350 generateAnnoatedCode();
352 for (Iterator iterator = cd2lattice.keySet().iterator(); iterator.hasNext();) {
353 ClassDescriptor cd = (ClassDescriptor) iterator.next();
354 SSJavaLattice<String> lattice = getLattice(cd);
355 HierarchyGraph hg = mapDescriptorToHierarchyGraph.get(cd);
356 // System.out.println("~~~\t" + cd + "\t" + lattice.getKeySet().size() + "\t"
357 // + hg.getNodeSet().size());
360 for (Iterator iterator = md2lattice.keySet().iterator(); iterator.hasNext();) {
361 MethodDescriptor md = (MethodDescriptor) iterator.next();
362 SSJavaLattice<String> locOrder = getLattice(md);
363 // writeLatticeDotFile(md.getClassDesc(), md, getMethodLattice(md));
364 HierarchyGraph hg = mapDescriptorToHierarchyGraph.get(md);
365 // System.out.println("~~~\t" + md.getClassDesc() + "_" + md + "\t"
366 // + locOrder.getKeySet().size() + "\t" + hg.getNodeSet().size());
369 if (state.SSJAVA_INFER_NAIVE_WRITEDOTS) {
370 System.out.println("The number of elements: Naive=" + numLocationsNaive);
372 System.out.println("The number of elements: SInfer=" + numLocationsSInfer);
378 private void calculateReturnPCLocInheritance() {
379 calculateHighestPCLocInheritance();
380 calculateLowestReturnLocInheritance();
381 updateFlowGraphPCReturnLocInheritance();
384 private void updateFlowGraphPCReturnLocInheritance() {
386 Set<MethodDescriptor> keySet = mapHighestOverriddenMethodDescToMethodDescSet.keySet();
387 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
388 MethodDescriptor highestMethodDesc = (MethodDescriptor) iterator.next();
390 if (mapHighestOverriddenMethodDescToMethodDescSet.get(highestMethodDesc).size() == 1) {
394 Set<MethodDescriptor> methodDescSet =
395 mapHighestOverriddenMethodDescToMethodDescSet.get(highestMethodDesc);
397 NTuple<Descriptor> highestPCLocDescTuple =
398 mapHighestOverriddenMethodDescToPCLocTuple.get(highestMethodDesc);
400 NTuple<Descriptor> highestRETURNLocDescTuple =
401 mapHighestOverriddenMethodDescToReturnLocTuple.get(highestMethodDesc);
403 // System.out.println("\n$$$$$$$$$$$$$$$$updateFlowGraphPCReturnLocInheritance="
404 // + highestMethodDesc);
405 // System.out.println("-----highestPCLoc=" + highestPCLocDescTuple);
406 // System.out.println("-----highestRETURNLoc=" + highestRETURNLocDescTuple);
408 for (Iterator iterator2 = methodDescSet.iterator(); iterator2.hasNext();) {
409 MethodDescriptor md = (MethodDescriptor) iterator2.next();
410 // System.out.println("\n --------MD=" + md);
411 FlowGraph flowGraph = getFlowGraph(md);
413 MethodSummary summary = getMethodSummary(md);
414 CompositeLocation curPCLoc = summary.getPCLoc();
415 NTuple<Descriptor> curPCDescTuple = translateToDescTuple(curPCLoc.getTuple());
416 // System.out.println("md=" + md + " curPCLoc=" + curPCLoc);
417 // System.out.println("highestPCLoc=" + highestPCLocDescTuple);
419 if (highestPCLocDescTuple == null) {
420 // this case: PCLOC is top
421 // System.out.println("###SET PCLOC AS TOP");
422 if (curPCDescTuple != null && !curPCLoc.get(0).isTop()) {
423 FlowNode pcFlowNode = flowGraph.getFlowNode(curPCDescTuple);
424 flowGraph.removeNode(pcFlowNode);
426 summary.setPCLoc(new CompositeLocation(new Location(md, Location.TOP)));
428 NTuple<Descriptor> newPCDescTuple = new NTuple<Descriptor>();
429 if (highestPCLocDescTuple.size() == 1) {
430 newPCDescTuple.add(highestPCLocDescTuple.get(0));
432 newPCDescTuple.add(md.getThis());
433 newPCDescTuple.add(highestPCLocDescTuple.get(1));
435 if (!curPCDescTuple.equals(newPCDescTuple)) {
436 FlowNode pcFlowNode = flowGraph.getFlowNode(curPCDescTuple);
437 flowGraph.updateTuple(pcFlowNode, newPCDescTuple);
438 // flowGraph.removeNode(pcFlowNode);
439 Set<NTuple<Descriptor>> descSetLowerThanPCLoc =
440 mapHighestOverriddenMethodDescToSetLowerThanPCLoc.get(highestMethodDesc);
441 for (Iterator iterator3 = descSetLowerThanPCLoc.iterator(); iterator3.hasNext();) {
442 NTuple<Descriptor> lowerNTuple = (NTuple<Descriptor>) iterator3.next();
443 flowGraph.addValueFlowEdge(newPCDescTuple, lowerNTuple);
445 CompositeLocation newPCCompLoc =
446 new CompositeLocation(translateToLocTuple(md, newPCDescTuple));
447 summary.setPCLoc(newPCCompLoc);
453 if (highestRETURNLocDescTuple != null) {
454 CompositeLocation curRETURNLoc = summary.getRETURNLoc();
455 NTuple<Descriptor> curReturnDescTuple = translateToDescTuple(curRETURNLoc.getTuple());
457 if (!curReturnDescTuple.equals(highestRETURNLocDescTuple)) {
458 // handle the case that RETURNLOC is started with 'this'...
459 NTuple<Descriptor> newRETURNLocDescTuple = new NTuple<Descriptor>();
460 if (highestRETURNLocDescTuple.size() == 1) {
461 newRETURNLocDescTuple.add(highestRETURNLocDescTuple.get(0));
463 newRETURNLocDescTuple.add(md.getThis());
464 newRETURNLocDescTuple.add(highestRETURNLocDescTuple.get(1));
467 FlowNode returnFlowNode = flowGraph.getFlowNode(curReturnDescTuple);
468 flowGraph.updateTuple(returnFlowNode, newRETURNLocDescTuple);
470 Set<NTuple<Descriptor>> descSetHigherThanRETURNLoc =
471 mapHighestOverriddenMethodDescToSetHigherThanRETURNLoc.get(highestMethodDesc);
472 for (Iterator iterator3 = descSetHigherThanRETURNLoc.iterator(); iterator3.hasNext();) {
473 NTuple<Descriptor> higherNTuple = (NTuple<Descriptor>) iterator3.next();
474 flowGraph.addValueFlowEdge(higherNTuple, newRETURNLocDescTuple);
477 CompositeLocation newRETURNLocCompLoc =
478 new CompositeLocation(translateToLocTuple(md, newRETURNLocDescTuple));
479 summary.setRETURNLoc(newRETURNLocCompLoc);
486 private void calculateHighestPCLocInheritance() {
488 Set<MethodDescriptor> keySet = mapHighestOverriddenMethodDescToMethodDescSet.keySet();
490 Map<MethodDescriptor, Integer> mapMethodDescToParamCount =
491 new HashMap<MethodDescriptor, Integer>();
493 next: for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
494 MethodDescriptor highestMethodDesc = (MethodDescriptor) iterator.next();
496 NTuple<Descriptor> tempTuple = null;
498 if (getMethodSummary(highestMethodDesc).getPCLoc() != null) {
500 Set<MethodDescriptor> methodDescSet =
501 mapHighestOverriddenMethodDescToMethodDescSet.get(highestMethodDesc);
503 if (methodDescSet.size() > 1) {
504 // System.out.println("---method desc set=" + methodDescSet + " from=" +
505 // highestMethodDesc);
510 for (Iterator iterator2 = methodDescSet.iterator(); iterator2.hasNext();) {
511 MethodDescriptor md = (MethodDescriptor) iterator2.next();
513 FlowGraph flowGraph = getFlowGraph(md);
514 if (flowGraph == null) {
517 Set<FlowNode> paramNodeSet = flowGraph.getParamFlowNodeSet();
518 // System.out.println("###md=" + md + " paramNodeSet=" + paramNodeSet);
520 CompositeLocation pcLOC = getMethodSummary(md).getPCLoc();
521 // System.out.println("---pcLOC=" + pcLOC);
523 if (md.equals(highestMethodDesc)) {
524 mapHighestOverriddenMethodDescToPCLocTuple.put(highestMethodDesc,
525 translateToDescTuple(pcLOC.getTuple()));
528 if (!pcLOC.get(0).isTop()) {
530 FlowNode pcFlowNode = flowGraph.getFlowNode(translateToDescTuple(pcLOC.getTuple()));
533 for (Iterator iterator3 = paramNodeSet.iterator(); iterator3.hasNext();) {
534 FlowNode paramNode = (FlowNode) iterator3.next();
535 if (flowGraph.getReachableSetFrom(pcFlowNode.getCurrentDescTuple().subList(0, 1))
536 .contains(paramNode)) {
540 mapMethodDescToParamCount.put(md, count);
544 // the PC location is top
545 // if one of pcloc among the method inheritance chain has the TOP,
546 // all methods in the same chain should have the TOP.
547 mapHighestOverriddenMethodDescToPCLocTuple.remove(highestMethodDesc);
548 // System.out.println("highest=" + highestMethodDesc + " HIGHEST PCLOC="
549 // + mapHighestOverriddenMethodDescToPCLocTuple.get(highestMethodDesc));
551 Set<NTuple<Descriptor>> descTupleSetLowerThanPC = new HashSet<NTuple<Descriptor>>();
552 for (Iterator iterator3 = paramNodeSet.iterator(); iterator3.hasNext();) {
553 FlowNode flowNode = (FlowNode) iterator3.next();
554 descTupleSetLowerThanPC.add(flowNode.getCurrentDescTuple());
556 mapHighestOverriddenMethodDescToSetLowerThanPCLoc.put(highestMethodDesc,
557 descTupleSetLowerThanPC);
563 // identify which method in the inheritance chain has the highest PCLOC
564 // basically, finds a method that has the highest count or TOP location
565 int highestCount = -1;
566 MethodDescriptor methodDescHighestCount = null;
567 for (Iterator iterator2 = methodDescSet.iterator(); iterator2.hasNext();) {
568 MethodDescriptor methodDesc = (MethodDescriptor) iterator2.next();
569 if (mapMethodDescToParamCount.containsKey(methodDesc)) {
570 int curCount = mapMethodDescToParamCount.get(methodDesc).intValue();
571 if (highestCount < curCount) {
572 highestCount = curCount;
573 methodDescHighestCount = methodDesc;
578 if (methodDescHighestCount != null) {
579 FlowGraph flowGraph = getFlowGraph(methodDescHighestCount);
580 CompositeLocation pcLOC = getMethodSummary(methodDescHighestCount).getPCLoc();
581 FlowNode pcFlowNode = flowGraph.getFlowNode(translateToDescTuple(pcLOC.getTuple()));
582 Set<FlowNode> reachableSet =
583 flowGraph.getReachableSetFrom(pcFlowNode.getCurrentDescTuple().subList(0, 1));
585 Set<FlowNode> reachableParamNodeSet = new HashSet<FlowNode>();
586 for (Iterator iterator3 = reachableSet.iterator(); iterator3.hasNext();) {
587 FlowNode flowNode = (FlowNode) iterator3.next();
588 if (flowGraph.isParameter(flowNode.getCurrentDescTuple())) {
589 reachableParamNodeSet.add(flowNode);
594 Set<NTuple<Descriptor>> descTupleSetLowerThanPC = new HashSet<NTuple<Descriptor>>();
595 for (Iterator iterator2 = reachableParamNodeSet.iterator(); iterator2.hasNext();) {
596 FlowNode flowNode = (FlowNode) iterator2.next();
597 descTupleSetLowerThanPC.add(flowNode.getCurrentDescTuple());
600 // mapHighestOverriddenMethodDescToPCLocTuple.remove(highestMethodDesc);
601 mapHighestOverriddenMethodDescToSetLowerThanPCLoc.put(highestMethodDesc,
602 descTupleSetLowerThanPC);
607 // System.out.println("####################################");
608 // System.out.println(" highest=" + highestMethodDesc + " HIGHEST PCLOC="
609 // + mapHighestOverriddenMethodDescToPCLocTuple.get(highestMethodDesc));
610 // System.out.println(" setLowerThanPCLoc="
611 // + mapHighestOverriddenMethodDescToSetLowerThanPCLoc.get(highestMethodDesc));
616 private void calculateLowestReturnLocInheritance() {
618 Set<MethodDescriptor> keySet = mapHighestOverriddenMethodDescToMethodDescSet.keySet();
620 Map<MethodDescriptor, Integer> mapMethodDescToParamCount =
621 new HashMap<MethodDescriptor, Integer>();
623 next: for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
624 MethodDescriptor highestMethodDesc = (MethodDescriptor) iterator.next();
626 Set<MethodDescriptor> methodDescSet =
627 mapHighestOverriddenMethodDescToMethodDescSet.get(highestMethodDesc);
629 if (methodDescSet.size() > 1 && getMethodSummary(highestMethodDesc).getRETURNLoc() != null) {
634 for (Iterator iterator2 = methodDescSet.iterator(); iterator2.hasNext();) {
635 MethodDescriptor md = (MethodDescriptor) iterator2.next();
637 FlowGraph flowGraph = getFlowGraph(md);
638 Set<FlowNode> paramNodeSet = flowGraph.getParamFlowNodeSet();
640 CompositeLocation returnLoc = getMethodSummary(md).getRETURNLoc();
642 FlowNode returnFlowNode = flowGraph.getFlowNode(translateToDescTuple(returnLoc.getTuple()));
645 for (Iterator iterator3 = paramNodeSet.iterator(); iterator3.hasNext();) {
646 FlowNode paramNode = (FlowNode) iterator3.next();
647 if (flowGraph.getReachableSetFrom(paramNode.getCurrentDescTuple().subList(0, 1))
648 .contains(returnFlowNode)) {
652 mapMethodDescToParamCount.put(md, count);
653 // System.out.println("###returnLoc=" + returnLoc + " count higher=" + count);
656 // identify which method in the inheritance chain has the highest PCLOC
657 // basically, finds a method that has the highest count or TOP location
658 int highestCount = -1;
659 MethodDescriptor methodDescHighestCount = null;
660 for (Iterator iterator2 = methodDescSet.iterator(); iterator2.hasNext();) {
661 MethodDescriptor methodDesc = (MethodDescriptor) iterator2.next();
662 int curCount = mapMethodDescToParamCount.get(methodDesc).intValue();
663 if (highestCount < curCount) {
664 highestCount = curCount;
665 methodDescHighestCount = methodDesc;
669 if (methodDescHighestCount != null) {
670 FlowGraph flowGraph = getFlowGraph(methodDescHighestCount);
671 CompositeLocation returnLOC = getMethodSummary(methodDescHighestCount).getRETURNLoc();
672 NTuple<Descriptor> returnLocTuple = translateToDescTuple(returnLOC.getTuple());
673 FlowNode returnFlowNode = flowGraph.getFlowNode(returnLocTuple);
675 Set<FlowNode> curMethodParamNodeSet = flowGraph.getParamFlowNodeSet();
676 Set<NTuple<Descriptor>> descTupleSetHigherThanPC = new HashSet<NTuple<Descriptor>>();
677 for (Iterator iterator3 = curMethodParamNodeSet.iterator(); iterator3.hasNext();) {
678 FlowNode paramNode = (FlowNode) iterator3.next();
679 if (flowGraph.getReachableSetFrom(paramNode.getCurrentDescTuple().subList(0, 1))
680 .contains(returnFlowNode)) {
681 descTupleSetHigherThanPC.add(paramNode.getCurrentDescTuple());
685 mapHighestOverriddenMethodDescToReturnLocTuple.put(highestMethodDesc, returnLocTuple);
686 mapHighestOverriddenMethodDescToSetHigherThanRETURNLoc.put(highestMethodDesc,
687 descTupleSetHigherThanPC);
691 // System.out.println("####################################");
692 // System.out.println(" highest=" + highestMethodDesc + " LOWEST RETURNLOC="
693 // + mapHighestOverriddenMethodDescToReturnLocTuple.get(highestMethodDesc));
694 // System.out.println(" setHigherThanReturnLoc="
695 // + mapHighestOverriddenMethodDescToSetHigherThanRETURNLoc.get(highestMethodDesc));
701 private void addMapHighestMethodDescToMethodDesc(MethodDescriptor highest, MethodDescriptor md) {
702 if (!mapHighestOverriddenMethodDescToMethodDescSet.containsKey(highest)) {
703 mapHighestOverriddenMethodDescToMethodDescSet.put(highest, new HashSet<MethodDescriptor>());
705 mapHighestOverriddenMethodDescToMethodDescSet.get(highest).add(md);
708 private void DFSInheritanceTreeCalculatingHighestOverriddenMethod(ClassDescriptor cd) {
710 // ClassDescriptor cd = node.getData();
712 for (Iterator iterator = cd.getMethods(); iterator.hasNext();) {
713 MethodDescriptor md = (MethodDescriptor) iterator.next();
714 MethodDescriptor highestMethodDesc = getHighestOverriddenMethod(md.getClassDesc(), md);
715 mapMethodDescToHighestOverriddenMethodDesc.put(md, highestMethodDesc);
716 addMapHighestMethodDescToMethodDesc(highestMethodDesc, md);
721 Set<ClassDescriptor> children = getDirectSubClasses(cd);
722 for (Iterator iterator = children.iterator(); iterator.hasNext();) {
723 ClassDescriptor child = (ClassDescriptor) iterator.next();
724 DFSInheritanceTreeCalculatingHighestOverriddenMethod(child);
729 private MethodDescriptor getHighestOverriddenMethod(ClassDescriptor curClassDesc,
730 MethodDescriptor curMethodDesc) {
732 // Node<ClassDescriptor> curNode = inheritanceTree.getTreeNode(curClassDesc);
733 // Node<ClassDescriptor> parentNode = curNode.getParent();
734 ClassDescriptor parentClassDesc = curClassDesc.getSuperDesc();
736 if (parentClassDesc != null) {
737 if (parentClassDesc.getMethodTable().contains(curMethodDesc.getSymbol())) {
738 Set<MethodDescriptor> methodDescSet =
739 parentClassDesc.getMethodTable().getSet(curMethodDesc.getSymbol());
740 for (Iterator iterator = methodDescSet.iterator(); iterator.hasNext();) {
741 MethodDescriptor md = (MethodDescriptor) iterator.next();
742 if (md.matches(curMethodDesc)) {
743 return getHighestOverriddenMethod(parentClassDesc, md);
747 // traverse to the parent!
748 return getHighestOverriddenMethod(parentClassDesc, curMethodDesc);
750 return curMethodDesc;
753 private void buildInheritanceTree() {
755 DFSInheritanceTreeCalculatingHighestOverriddenMethod(rootClassDescriptor);
759 private void addInheritanceConstraintsToHierarchyGraph() {
761 // DFS the inheritance tree and propagates nodes/edges of parent to child
763 // Node<ClassDescriptor> rootNode = inheritanceTree.getRootNode();
764 DFSInheritanceTree(rootClassDescriptor);
768 private void DFSInheritanceTree(ClassDescriptor parentClassDescriptor) {
770 // ClassDescriptor parentClassDescriptor = parentNode.getData();
772 Set<ClassDescriptor> children = getDirectSubClasses(parentClassDescriptor);
773 for (Iterator iterator = children.iterator(); iterator.hasNext();) {
774 ClassDescriptor childClassDescriptor = (ClassDescriptor) iterator.next();
776 HierarchyGraph parentGraph = getHierarchyGraph(parentClassDescriptor);
777 HierarchyGraph childGraph = getHierarchyGraph(childClassDescriptor);
779 Set<HNode> parentNodeSet = parentGraph.getNodeSet();
780 for (Iterator iterator2 = parentNodeSet.iterator(); iterator2.hasNext();) {
781 HNode hNode = (HNode) iterator2.next();
782 childGraph.addNode(hNode);
785 // copies extra information from the parent hierarchy graph
786 Map<HNode, Set<HNode>> parentMergeNodeMap = parentGraph.getMapHNodetoMergeSet();
787 Map<HNode, Set<HNode>> childMergeNodeMap = childGraph.getMapHNodetoMergeSet();
789 Set<HNode> keySet = parentMergeNodeMap.keySet();
790 for (Iterator iterator2 = keySet.iterator(); iterator2.hasNext();) {
791 HNode parentKey = (HNode) iterator2.next();
792 if (!childMergeNodeMap.containsKey(parentKey)) {
793 childMergeNodeMap.put(parentKey, new HashSet<HNode>());
795 childMergeNodeMap.get(parentKey).addAll(parentMergeNodeMap.get(parentKey));
798 // copies nodes/edges from the parent class...
799 for (Iterator iterator2 = parentNodeSet.iterator(); iterator2.hasNext();) {
800 HNode parentHNode = (HNode) iterator2.next();
802 Set<HNode> parentIncomingHNode = parentGraph.getIncomingNodeSet(parentHNode);
803 Set<HNode> parentOutgoingHNode = parentGraph.getOutgoingNodeSet(parentHNode);
805 for (Iterator iterator3 = parentIncomingHNode.iterator(); iterator3.hasNext();) {
806 HNode inHNode = (HNode) iterator3.next();
807 childGraph.addEdge(inHNode.getDescriptor(), parentHNode.getDescriptor());
810 for (Iterator iterator3 = parentOutgoingHNode.iterator(); iterator3.hasNext();) {
811 HNode outHNode = (HNode) iterator3.next();
812 childGraph.addEdge(parentHNode.getDescriptor(), outHNode.getDescriptor());
817 // copies nodes/edges from parent methods to overridden methods
819 for (Iterator iterator3 = childClassDescriptor.getMethods(); iterator3.hasNext();) {
820 MethodDescriptor childMethodDescriptor = (MethodDescriptor) iterator3.next();
822 MethodDescriptor parentMethodDesc =
823 getParentMethodDesc(childMethodDescriptor.getClassDesc(), childMethodDescriptor);
825 if (parentMethodDesc != null) {
827 HierarchyGraph parentMethodGraph = getHierarchyGraph(parentMethodDesc);
828 HierarchyGraph childMethodGraph = getHierarchyGraph(childMethodDescriptor);
830 Set<HNode> parentMethodNodeSet = parentMethodGraph.getNodeSet();
831 for (Iterator iterator2 = parentMethodNodeSet.iterator(); iterator2.hasNext();) {
832 HNode hNode = (HNode) iterator2.next();
833 childMethodGraph.addNode(hNode);
836 // copies extra information from the parent hierarchy graph
837 Map<HNode, Set<HNode>> parentMethodMergeNodeMap =
838 parentMethodGraph.getMapHNodetoMergeSet();
839 Map<HNode, Set<HNode>> childMethodMergeNodeMap = childMethodGraph.getMapHNodetoMergeSet();
841 Set<HNode> methodKeySet = parentMethodMergeNodeMap.keySet();
842 for (Iterator iterator2 = methodKeySet.iterator(); iterator2.hasNext();) {
843 HNode parentKey = (HNode) iterator2.next();
844 if (!childMethodMergeNodeMap.containsKey(parentKey)) {
845 childMethodMergeNodeMap.put(parentKey, new HashSet<HNode>());
847 childMethodMergeNodeMap.get(parentKey).addAll(parentMethodMergeNodeMap.get(parentKey));
850 // copies nodes/edges from the parent method...
851 for (Iterator iterator2 = parentMethodGraph.getNodeSet().iterator(); iterator2.hasNext();) {
852 HNode parentHNode = (HNode) iterator2.next();
854 Set<HNode> parentIncomingHNode = parentMethodGraph.getIncomingNodeSet(parentHNode);
855 Set<HNode> parentOutgoingHNode = parentMethodGraph.getOutgoingNodeSet(parentHNode);
857 for (Iterator iterator4 = parentIncomingHNode.iterator(); iterator4.hasNext();) {
858 HNode inHNode = (HNode) iterator4.next();
859 childMethodGraph.addEdge(inHNode, parentHNode);
862 for (Iterator iterator4 = parentOutgoingHNode.iterator(); iterator4.hasNext();) {
863 HNode outHNode = (HNode) iterator4.next();
864 childMethodGraph.addEdge(parentHNode, outHNode);
873 DFSInheritanceTree(childClassDescriptor);
878 public MethodDescriptor getParentMethodDesc(ClassDescriptor classDesc, MethodDescriptor methodDesc) {
880 // Node<ClassDescriptor> childNode = inheritanceTree.getTreeNode(classDesc);
881 ClassDescriptor parentClassDesc = classDesc.getSuperDesc();
882 // Node<ClassDescriptor> parentNode = childNode.getParent();
884 if (parentClassDesc != null) {
885 // ClassDescriptor parentClassDesc = parentNode.getData();
886 if (parentClassDesc.getMethodTable().contains(methodDesc.getSymbol())) {
887 Set<MethodDescriptor> methodDescSet =
888 parentClassDesc.getMethodTable().getSet(methodDesc.getSymbol());
889 for (Iterator iterator = methodDescSet.iterator(); iterator.hasNext();) {
890 MethodDescriptor md = (MethodDescriptor) iterator.next();
891 if (md.matches(methodDesc)) {
897 // traverse to the parent!
898 getParentMethodDesc(parentClassDesc, methodDesc);
905 private void checkReturnNodes() {
906 LinkedList<MethodDescriptor> methodDescList =
907 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
909 while (!methodDescList.isEmpty()) {
910 MethodDescriptor md = methodDescList.removeLast();
912 if (md.getReturnType() != null && !md.getReturnType().isVoid()) {
913 checkFlowNodeReturnThisField(md);
915 // // in this case, this method will return the composite location that starts with 'this'
916 // FlowGraph flowGraph = getFlowGraph(md);
917 // Set<FlowNode> returnNodeSet = flowGraph.getReturnNodeSet();
924 private void addSuperClasses(ClassDescriptor cd) {
925 ClassDescriptor parentClassDesc = cd.getSuperDesc();
926 if (parentClassDesc != null) {
927 toanalyze_classDescSet.add(parentClassDesc);
928 addSuperClasses(parentClassDesc);
932 private void updateFlowGraph() {
934 LinkedList<MethodDescriptor> methodDescList =
935 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
937 while (!methodDescList.isEmpty()) {
938 MethodDescriptor md = methodDescList.removeLast();
939 if (state.SSJAVADEBUG) {
940 System.out.println();
941 System.out.println("SSJAVA: Updating a flow graph: " + md);
942 propagateFlowsFromCalleesWithNoCompositeLocation(md);
945 Set<FlowNode> nodeSet = getFlowGraph(md).getNodeSet();
946 for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
947 FlowNode flowNode = (FlowNode) iterator.next();
948 NTuple<Descriptor> descTuple = flowNode.getCurrentDescTuple();
949 NTuple<Location> locTuple = translateToLocTuple(md, descTuple);
950 for (int i = 0; i < locTuple.size(); i++) {
951 Location loc = locTuple.get(i);
952 if (loc.getDescriptor() instanceof ClassDescriptor) {
953 ClassDescriptor classDesc = (ClassDescriptor) loc.getDescriptor();
954 toanalyze_classDescSet.add(classDesc);
955 addSuperClasses(classDesc);
956 } else if (loc.getDescriptor() instanceof MethodDescriptor) {
957 toanalyze_classDescSet.add(((MethodDescriptor) loc.getDescriptor()).getClassDesc());
966 public Map<NTuple<Descriptor>, NTuple<Descriptor>> getMapCallerArgToCalleeParam(
967 MethodInvokeNode min) {
969 if (!mapMethodInvokeNodeToMapCallerArgToCalleeArg.containsKey(min)) {
970 mapMethodInvokeNodeToMapCallerArgToCalleeArg.put(min,
971 new HashMap<NTuple<Descriptor>, NTuple<Descriptor>>());
974 return mapMethodInvokeNodeToMapCallerArgToCalleeArg.get(min);
977 public void addMapCallerArgToCalleeParam(MethodInvokeNode min, NTuple<Descriptor> callerArg,
978 NTuple<Descriptor> calleeParam) {
979 getMapCallerArgToCalleeParam(min).put(callerArg, calleeParam);
982 private void assignCompositeLocation() {
983 calculateGlobalValueFlowCompositeLocation();
984 translateCompositeLocationAssignmentToFlowGraph();
987 private void translateCompositeLocationAssignmentToFlowGraph() {
988 System.out.println("\nSSJAVA: Translate composite location assignments to flow graphs:");
989 MethodDescriptor methodEventLoopDesc = ssjava.getMethodContainingSSJavaLoop();
990 translateCompositeLocationAssignmentToFlowGraph(methodEventLoopDesc);
993 private void translateCompositeLocationAssignmentToFlowGraph2() {
994 System.out.println("\nSSJAVA: Translate composite location assignments to flow graphs:");
995 MethodDescriptor methodEventLoopDesc = ssjava.getMethodContainingSSJavaLoop();
996 translateCompositeLocationAssignmentToFlowGraph(methodEventLoopDesc);
999 private void addAdditionalOrderingConstraints() {
1000 System.out.println("\nSSJAVA: Add addtional ordering constriants:");
1001 MethodDescriptor methodEventLoopDesc = ssjava.getMethodContainingSSJavaLoop();
1002 addAddtionalOrderingConstraints(methodEventLoopDesc);
1003 // calculateReturnHolderLocation();
1006 private void calculateReturnHolderLocation() {
1007 LinkedList<MethodDescriptor> methodDescList =
1008 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
1010 while (!methodDescList.isEmpty()) {
1011 MethodDescriptor md = methodDescList.removeLast();
1013 FlowGraph fg = getFlowGraph(md);
1014 Set<FlowNode> nodeSet = fg.getNodeSet();
1015 for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
1016 FlowNode flowNode = (FlowNode) iterator.next();
1017 if (flowNode.isFromHolder()) {
1018 calculateCompositeLocationFromFlowGraph(md, flowNode);
1025 private void updateCompositeLocationAssignments() {
1027 LinkedList<MethodDescriptor> methodDescList =
1028 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
1030 while (!methodDescList.isEmpty()) {
1031 MethodDescriptor md = methodDescList.removeLast();
1033 System.out.println("\n#updateCompositeLocationAssignments=" + md);
1035 FlowGraph flowGraph = getFlowGraph(md);
1037 MethodSummary methodSummary = getMethodSummary(md);
1039 Set<FlowNode> nodeSet = flowGraph.getNodeSet();
1040 for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
1041 FlowNode node = (FlowNode) iterator.next();
1042 System.out.println("-node=" + node + " node.getDescTuple=" + node.getDescTuple());
1043 if (node.getCompositeLocation() != null) {
1044 CompositeLocation compLoc = node.getCompositeLocation();
1045 CompositeLocation updatedCompLoc = updateCompositeLocation(compLoc);
1046 node.setCompositeLocation(updatedCompLoc);
1047 System.out.println("---updatedCompLoc1=" + updatedCompLoc);
1049 NTuple<Descriptor> descTuple = node.getDescTuple();
1050 // System.out.println("update desc=" + descTuple);
1051 CompositeLocation compLoc = convertToCompositeLocation(md, descTuple);
1052 compLoc = updateCompositeLocation(compLoc);
1053 node.setCompositeLocation(compLoc);
1054 // System.out.println("---updatedCompLoc2=" + compLoc);
1057 if (node.isDeclaratonNode()) {
1058 Descriptor localVarDesc = node.getDescTuple().get(0);
1059 CompositeLocation compLoc = updateCompositeLocation(node.getCompositeLocation());
1060 methodSummary.addMapVarNameToInferCompLoc(localVarDesc, compLoc);
1064 // update PCLOC and RETURNLOC if they have a composite location assignment
1065 if (methodSummary.getRETURNLoc() != null) {
1066 methodSummary.setRETURNLoc(updateCompositeLocation(methodSummary.getRETURNLoc()));
1068 if (methodSummary.getPCLoc() != null) {
1069 methodSummary.setPCLoc(updateCompositeLocation(methodSummary.getPCLoc()));
1076 private CompositeLocation updateCompositeLocation(CompositeLocation compLoc) {
1077 CompositeLocation updatedCompLoc = new CompositeLocation();
1078 for (int i = 0; i < compLoc.getSize(); i++) {
1079 Location loc = compLoc.get(i);
1080 String nodeIdentifier = loc.getLocIdentifier();
1081 Descriptor enclosingDesc = loc.getDescriptor();
1083 if (!enclosingDesc.equals(GLOBALDESC)) {
1084 LocationSummary locSummary = getLocationSummary(enclosingDesc);
1085 // HierarchyGraph scGraph = getSkeletonCombinationHierarchyGraph(enclosingDesc);
1086 HierarchyGraph scGraph = getSimpleHierarchyGraph(enclosingDesc);
1087 if (scGraph != null) {
1088 HNode curNode = scGraph.getCurrentHNode(nodeIdentifier);
1089 System.out.println(" nodeID=" + nodeIdentifier + " curNode=" + curNode
1090 + " enclosingDesc=" + enclosingDesc);
1091 if (curNode != null) {
1092 nodeIdentifier = curNode.getName();
1095 locName = locSummary.getLocationName(nodeIdentifier);
1097 locName = nodeIdentifier;
1099 Location updatedLoc = new Location(enclosingDesc, locName);
1100 updatedCompLoc.addLocation(updatedLoc);
1103 return updatedCompLoc;
1106 private void translateCompositeLocationAssignmentToFlowGraph(MethodDescriptor mdCaller) {
1108 // System.out.println("\n\n###translateCompositeLocationAssignmentToFlowGraph mdCaller="
1111 // First, assign a composite location to a node in the flow graph
1112 GlobalFlowGraph callerGlobalFlowGraph = getSubGlobalFlowGraph(mdCaller);
1114 FlowGraph callerFlowGraph = getFlowGraph(mdCaller);
1115 Map<Location, CompositeLocation> callerMapLocToCompLoc =
1116 callerGlobalFlowGraph.getMapLocationToInferCompositeLocation();
1118 Set<Location> methodLocSet = callerMapLocToCompLoc.keySet();
1119 for (Iterator iterator = methodLocSet.iterator(); iterator.hasNext();) {
1120 Location methodLoc = (Location) iterator.next();
1121 if (methodLoc.getDescriptor().equals(mdCaller)) {
1122 CompositeLocation inferCompLoc = callerMapLocToCompLoc.get(methodLoc);
1123 assignCompositeLocationToFlowGraph(callerFlowGraph, methodLoc, inferCompLoc);
1127 Set<MethodInvokeNode> minSet = mapMethodDescriptorToMethodInvokeNodeSet.get(mdCaller);
1129 Set<MethodDescriptor> calleeSet = new HashSet<MethodDescriptor>();
1130 for (Iterator iterator = minSet.iterator(); iterator.hasNext();) {
1131 MethodInvokeNode min = (MethodInvokeNode) iterator.next();
1132 // need to translate a composite location that is started with the base
1134 translateMapLocationToInferCompositeLocationToCalleeGraph(callerGlobalFlowGraph, min);
1135 MethodDescriptor mdCallee = min.getMethod();
1136 calleeSet.add(mdCallee);
1140 for (Iterator iterator = calleeSet.iterator(); iterator.hasNext();) {
1141 MethodDescriptor callee = (MethodDescriptor) iterator.next();
1142 translateCompositeLocationAssignmentToFlowGraph(callee);
1147 private void addAddtionalOrderingConstraints(MethodDescriptor mdCaller) {
1149 // First, assign a composite location to a node in the flow graph
1150 GlobalFlowGraph callerGlobalFlowGraph = getSubGlobalFlowGraph(mdCaller);
1152 FlowGraph callerFlowGraph = getFlowGraph(mdCaller);
1153 Map<Location, CompositeLocation> callerMapLocToCompLoc =
1154 callerGlobalFlowGraph.getMapLocationToInferCompositeLocation();
1155 Set<Location> methodLocSet = callerMapLocToCompLoc.keySet();
1157 Set<MethodInvokeNode> minSet = mapMethodDescriptorToMethodInvokeNodeSet.get(mdCaller);
1159 Set<MethodDescriptor> calleeSet = new HashSet<MethodDescriptor>();
1160 for (Iterator iterator = minSet.iterator(); iterator.hasNext();) {
1161 MethodInvokeNode min = (MethodInvokeNode) iterator.next();
1162 MethodDescriptor mdCallee = min.getMethod();
1163 calleeSet.add(mdCallee);
1166 // add an additional ordering constraint
1167 // if the first element of a parameter composite location matches 'this' reference,
1168 // the corresponding argument in the caller is required to be higher than the translated
1169 // parameter location in the caller lattice
1171 // addOrderingConstraintFromCompLocParamToArg(mdCaller, min);
1174 // update return flow nodes in the caller
1175 CompositeLocation returnLoc = getMethodSummary(mdCallee).getRETURNLoc();
1176 // System.out.println("### min=" + min.printNode(0) + " returnLoc=" + returnLoc);
1177 if (returnLoc != null && returnLoc.get(0).getLocDescriptor().equals(mdCallee.getThis())
1178 && returnLoc.getSize() > 1) {
1179 // System.out.println("###RETURN COMP LOC=" + returnLoc);
1180 NTuple<Location> returnLocTuple = returnLoc.getTuple();
1181 NTuple<Descriptor> baseTuple = mapMethodInvokeNodeToBaseTuple.get(min);
1182 // System.out.println("###basetuple=" + baseTuple);
1183 NTuple<Descriptor> newReturnTuple = baseTuple.clone();
1184 for (int i = 1; i < returnLocTuple.size(); i++) {
1185 newReturnTuple.add(returnLocTuple.get(i).getLocDescriptor());
1187 // System.out.println("###NEW RETURN TUPLE FOR CALLER=" + newReturnTuple);
1189 FlowReturnNode holderNode = callerFlowGraph.getFlowReturnNode(min);
1190 NodeTupleSet holderTupleSet =
1191 getNodeTupleSetFromReturnNode(getFlowGraph(mdCaller), holderNode);
1193 callerFlowGraph.getFlowReturnNode(min).setNewTuple(newReturnTuple);
1195 // then need to remove old constraints
1197 // System.out.println("###REMOVE OLD CONSTRAINTS=" + holderNode);
1198 for (Iterator<NTuple<Descriptor>> iter = holderTupleSet.iterator(); iter.hasNext();) {
1199 NTuple<Descriptor> tupleFromHolder = iter.next();
1200 Set<FlowEdge> holderOutEdge = callerFlowGraph.getOutEdgeSet(holderNode);
1201 for (Iterator iterator2 = holderOutEdge.iterator(); iterator2.hasNext();) {
1202 FlowEdge outEdge = (FlowEdge) iterator2.next();
1203 NTuple<Descriptor> toberemovedTuple = outEdge.getEndTuple();
1204 // System.out.println("---remove " + tupleFromHolder + " -> " + toberemovedTuple);
1205 callerFlowGraph.removeEdge(tupleFromHolder, toberemovedTuple);
1210 // if the return loc set was empty and later pcloc was connected to the return loc
1211 // need to make sure that return loc reflects to this changes.
1212 FlowReturnNode flowReturnNode = callerFlowGraph.getFlowReturnNode(min);
1213 if (flowReturnNode != null && flowReturnNode.getReturnTupleSet().isEmpty()) {
1215 if (needToUpdateReturnLocHolder(min.getMethod(), flowReturnNode)) {
1216 NTuple<Descriptor> baseTuple = mapMethodInvokeNodeToBaseTuple.get(min);
1217 NTuple<Descriptor> newReturnTuple = baseTuple.clone();
1218 flowReturnNode.addTuple(newReturnTuple);
1227 for (Iterator iterator = calleeSet.iterator(); iterator.hasNext();) {
1228 MethodDescriptor callee = (MethodDescriptor) iterator.next();
1229 addAddtionalOrderingConstraints(callee);
1234 private boolean needToUpdateReturnLocHolder(MethodDescriptor mdCallee,
1235 FlowReturnNode flowReturnNode) {
1236 FlowGraph fg = getFlowGraph(mdCallee);
1237 MethodSummary summary = getMethodSummary(mdCallee);
1238 CompositeLocation returnCompLoc = summary.getRETURNLoc();
1239 NTuple<Descriptor> returnDescTuple = translateToDescTuple(returnCompLoc.getTuple());
1240 Set<FlowNode> incomingNodeToReturnNode =
1241 fg.getIncomingFlowNodeSet(fg.getFlowNode(returnDescTuple));
1242 for (Iterator iterator = incomingNodeToReturnNode.iterator(); iterator.hasNext();) {
1243 FlowNode inNode = (FlowNode) iterator.next();
1244 if (inNode.getDescTuple().get(0).equals(mdCallee.getThis())) {
1251 private void addMapMethodDescToMethodInvokeNodeSet(MethodInvokeNode min) {
1252 MethodDescriptor md = min.getMethod();
1253 if (!mapMethodDescToMethodInvokeNodeSet.containsKey(md)) {
1254 mapMethodDescToMethodInvokeNodeSet.put(md, new HashSet<MethodInvokeNode>());
1256 mapMethodDescToMethodInvokeNodeSet.get(md).add(min);
1259 private Set<MethodInvokeNode> getMethodInvokeNodeSetByMethodDesc(MethodDescriptor md) {
1260 if (!mapMethodDescToMethodInvokeNodeSet.containsKey(md)) {
1261 mapMethodDescToMethodInvokeNodeSet.put(md, new HashSet<MethodInvokeNode>());
1263 return mapMethodDescToMethodInvokeNodeSet.get(md);
1266 public void assignCompositeLocationToFlowGraph(FlowGraph flowGraph, Location loc,
1267 CompositeLocation inferCompLoc) {
1268 Descriptor localDesc = loc.getLocDescriptor();
1270 Set<FlowNode> nodeSet = flowGraph.getNodeSet();
1271 for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
1272 FlowNode node = (FlowNode) iterator.next();
1273 if (node.getDescTuple().startsWith(localDesc)
1274 && !node.getDescTuple().get(0).equals(LITERALDESC)) {
1275 // need to assign the inferred composite location to this node
1276 CompositeLocation newCompLoc = generateCompositeLocation(node.getDescTuple(), inferCompLoc);
1277 node.setCompositeLocation(newCompLoc);
1278 // System.out.println("SET Node=" + node + " inferCompLoc=" + newCompLoc);
1283 private CompositeLocation generateCompositeLocation(NTuple<Descriptor> nodeDescTuple,
1284 CompositeLocation inferCompLoc) {
1286 // System.out.println("generateCompositeLocation=" + nodeDescTuple + " with inferCompLoc="
1289 MethodDescriptor md = (MethodDescriptor) inferCompLoc.get(0).getDescriptor();
1291 CompositeLocation newCompLoc = new CompositeLocation();
1292 for (int i = 0; i < inferCompLoc.getSize(); i++) {
1293 newCompLoc.addLocation(inferCompLoc.get(i));
1296 Descriptor lastDescOfPrefix = nodeDescTuple.get(0);
1297 Descriptor enclosingDescriptor;
1298 if (lastDescOfPrefix instanceof InterDescriptor) {
1299 enclosingDescriptor = getFlowGraph(md).getEnclosingDescriptor(lastDescOfPrefix);
1301 enclosingDescriptor = ((VarDescriptor) lastDescOfPrefix).getType().getClassDesc();
1304 for (int i = 1; i < nodeDescTuple.size(); i++) {
1305 Descriptor desc = nodeDescTuple.get(i);
1306 Location locElement = new Location(enclosingDescriptor, desc);
1307 newCompLoc.addLocation(locElement);
1309 enclosingDescriptor = ((FieldDescriptor) desc).getClassDescriptor();
1315 private void translateMapLocationToInferCompositeLocationToCalleeGraph(
1316 GlobalFlowGraph callerGraph, MethodInvokeNode min) {
1318 MethodDescriptor mdCallee = min.getMethod();
1319 MethodDescriptor mdCaller = callerGraph.getMethodDescriptor();
1320 Map<Location, CompositeLocation> callerMapLocToCompLoc =
1321 callerGraph.getMapLocationToInferCompositeLocation();
1323 Map<Integer, NTuple<Descriptor>> mapIdxToArgTuple = mapMethodInvokeNodeToArgIdxMap.get(min);
1325 FlowGraph calleeFlowGraph = getFlowGraph(mdCallee);
1326 GlobalFlowGraph calleeGlobalGraph = getSubGlobalFlowGraph(mdCallee);
1328 NTuple<Location> baseLocTuple = null;
1329 if (mapMethodInvokeNodeToBaseTuple.containsKey(min)) {
1330 baseLocTuple = translateToLocTuple(mdCaller, mapMethodInvokeNodeToBaseTuple.get(min));
1333 // System.out.println("\n-#translate caller=" + mdCaller + " infer composite loc to callee="
1334 // + mdCallee + " baseLocTuple=" + baseLocTuple);
1336 Set<Location> keySet = callerMapLocToCompLoc.keySet();
1337 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
1338 Location key = (Location) iterator.next();
1339 CompositeLocation callerCompLoc = callerMapLocToCompLoc.get(key);
1341 if (!key.getDescriptor().equals(mdCaller)) {
1343 CompositeLocation newCalleeCompLoc;
1344 if (baseLocTuple != null && callerCompLoc.getTuple().startsWith(baseLocTuple)) {
1345 // System.out.println("-----need to translate callerCompLoc=" + callerCompLoc
1346 // + " with baseTuple=" + baseLocTuple);
1348 translateCompositeLocationToCallee(callerCompLoc, baseLocTuple, mdCallee);
1350 calleeGlobalGraph.addMapLocationToInferCompositeLocation(key, newCalleeCompLoc);
1351 // System.out.println("1---key=" + key + " callerCompLoc=" + callerCompLoc
1352 // + " newCalleeCompLoc=" + newCalleeCompLoc);
1353 // System.out.println("-----caller=" + mdCaller + " callee=" + mdCallee);
1354 if (!newCalleeCompLoc.get(0).getDescriptor().equals(mdCallee)) {
1358 // System.out.println("-----baseLoctuple=" + baseLocTuple);
1360 // check if it is the global access
1361 Location compLocFirstElement = callerCompLoc.getTuple().get(0);
1362 if (compLocFirstElement.getDescriptor().equals(mdCallee)
1363 && compLocFirstElement.getLocDescriptor().equals(GLOBALDESC)) {
1365 newCalleeCompLoc = new CompositeLocation();
1366 Location newMethodLoc = new Location(mdCallee, GLOBALDESC);
1368 newCalleeCompLoc.addLocation(newMethodLoc);
1369 for (int i = 1; i < callerCompLoc.getSize(); i++) {
1370 newCalleeCompLoc.addLocation(callerCompLoc.get(i));
1372 calleeGlobalGraph.addMapLocationToInferCompositeLocation(key, newCalleeCompLoc);
1373 // System.out.println("2---key=" + key + " callerCompLoc=" + callerCompLoc
1374 // + " newCalleeCompLoc=" + newCalleeCompLoc);
1375 // System.out.println("-----caller=" + mdCaller + " callee=" + mdCallee);
1378 int paramIdx = getParamIdx(callerCompLoc, mapIdxToArgTuple);
1379 if (paramIdx == -1) {
1380 // here, the first element of the current composite location comes from the current
1382 // so transfer the same composite location to the callee
1383 if (!calleeGlobalGraph.contrainsInferCompositeLocationMapKey(key)) {
1384 if (callerCompLoc.get(0).getDescriptor().equals(mdCallee)) {
1385 // System.out.println("3---key=" + key + " callerCompLoc=" + callerCompLoc
1386 // + " newCalleeCompLoc=" + callerCompLoc);
1387 // System.out.println("-----caller=" + mdCaller + " callee=" + mdCallee);
1388 calleeGlobalGraph.addMapLocationToInferCompositeLocation(key, callerCompLoc);
1390 // System.out.println("3---SKIP key=" + key + " callerCompLoc=" + callerCompLoc);
1396 // It is the case where two parameters have relative orderings between them by having
1397 // composite locations
1398 // if we found the param idx, it means that the first part of the caller composite
1399 // location corresponds to the one of arguments.
1400 // for example, if the caller argument is <<caller.this>,<Decoder.br>>
1401 // and the current caller composite location mapping
1402 // <<caller.this>,<Decoder.br>,<Br.value>>
1403 // and the parameter which matches with the caller argument is 'Br brParam'
1404 // then, the translated callee composite location will be <<callee.brParam>,<Br.value>>
1405 NTuple<Descriptor> argTuple = mapIdxToArgTuple.get(paramIdx);
1407 FlowNode paramFlowNode = calleeFlowGraph.getParamFlowNode(paramIdx);
1408 NTuple<Location> paramLocTuple =
1409 translateToLocTuple(mdCallee, paramFlowNode.getDescTuple());
1410 newCalleeCompLoc = new CompositeLocation();
1411 for (int i = 0; i < paramLocTuple.size(); i++) {
1412 newCalleeCompLoc.addLocation(paramLocTuple.get(i));
1414 for (int i = argTuple.size(); i < callerCompLoc.getSize(); i++) {
1415 newCalleeCompLoc.addLocation(callerCompLoc.get(i));
1417 calleeGlobalGraph.addMapLocationToInferCompositeLocation(key, newCalleeCompLoc);
1418 // System.out.println("4---key=" + key + " callerCompLoc=" + callerCompLoc
1419 // + " newCalleeCompLoc=" + newCalleeCompLoc);
1420 // System.out.println("-----caller=" + mdCaller + " callee=" + mdCallee);
1429 // System.out.println("#ASSIGN COMP LOC TO CALLEE PARAMS: callee=" + mdCallee + " caller="
1431 // If the location of an argument has a composite location
1432 // need to assign a proper composite location to the corresponding callee parameter
1433 Set<Integer> idxSet = mapIdxToArgTuple.keySet();
1434 for (Iterator iterator = idxSet.iterator(); iterator.hasNext();) {
1435 Integer idx = (Integer) iterator.next();
1437 if (idx == 0 && !min.getMethod().isStatic()) {
1441 NTuple<Descriptor> argTuple = mapIdxToArgTuple.get(idx);
1442 // System.out.println("-argTuple=" + argTuple + " idx=" + idx);
1443 if (argTuple.size() > 0) {
1444 // check if an arg tuple has been already assigned to a composite location
1445 NTuple<Location> argLocTuple = translateToLocTuple(mdCaller, argTuple);
1446 Location argLocalLoc = argLocTuple.get(0);
1448 // if (!isPrimitiveType(argTuple)) {
1449 if (callerMapLocToCompLoc.containsKey(argLocalLoc)) {
1451 CompositeLocation callerCompLoc = callerMapLocToCompLoc.get(argLocalLoc);
1452 for (int i = 1; i < argLocTuple.size(); i++) {
1453 callerCompLoc.addLocation(argLocTuple.get(i));
1456 // System.out.println("---callerCompLoc=" + callerCompLoc);
1458 // if (baseLocTuple != null && callerCompLoc.getTuple().startsWith(baseLocTuple)) {
1460 FlowNode calleeParamFlowNode = calleeFlowGraph.getParamFlowNode(idx);
1462 NTuple<Descriptor> calleeParamDescTuple = calleeParamFlowNode.getDescTuple();
1463 NTuple<Location> calleeParamLocTuple =
1464 translateToLocTuple(mdCallee, calleeParamDescTuple);
1466 int refParamIdx = getParamIdx(callerCompLoc, mapIdxToArgTuple);
1467 // System.out.println("-----paramIdx=" + refParamIdx);
1468 if (refParamIdx == 0 && !mdCallee.isStatic()) {
1470 // System.out.println("-------need to translate callerCompLoc=" + callerCompLoc
1471 // + " with baseTuple=" + baseLocTuple + " calleeParamLocTuple="
1472 // + calleeParamLocTuple);
1474 CompositeLocation newCalleeCompLoc =
1475 translateCompositeLocationToCallee(callerCompLoc, baseLocTuple, mdCallee);
1477 calleeGlobalGraph.addMapLocationToInferCompositeLocation(calleeParamLocTuple.get(0),
1480 // System.out.println("---------key=" + calleeParamLocTuple.get(0) + " callerCompLoc="
1481 // + callerCompLoc + " newCalleeCompLoc=" + newCalleeCompLoc);
1483 } else if (refParamIdx != -1) {
1484 // the first element of an argument composite location matches with one of paramtere
1485 // composite locations
1487 // System.out.println("-------param match case=");
1489 NTuple<Descriptor> argTupleRef = mapIdxToArgTuple.get(refParamIdx);
1490 FlowNode refParamFlowNode = calleeFlowGraph.getParamFlowNode(refParamIdx);
1491 NTuple<Location> refParamLocTuple =
1492 translateToLocTuple(mdCallee, refParamFlowNode.getDescTuple());
1494 // System.out.println("---------refParamLocTuple=" + refParamLocTuple
1495 // + " from argTupleRef=" + argTupleRef);
1497 CompositeLocation newCalleeCompLoc = new CompositeLocation();
1498 for (int i = 0; i < refParamLocTuple.size(); i++) {
1499 newCalleeCompLoc.addLocation(refParamLocTuple.get(i));
1501 for (int i = argTupleRef.size(); i < callerCompLoc.getSize(); i++) {
1502 newCalleeCompLoc.addLocation(callerCompLoc.get(i));
1505 calleeGlobalGraph.addMapLocationToInferCompositeLocation(calleeParamLocTuple.get(0),
1508 calleeParamFlowNode.setCompositeLocation(newCalleeCompLoc);
1509 // System.out.println("-----------key=" + calleeParamLocTuple.get(0) +
1510 // " callerCompLoc="
1511 // + callerCompLoc + " newCalleeCompLoc=" + newCalleeCompLoc);
1514 CompositeLocation newCalleeCompLoc =
1515 calculateCompositeLocationFromSubGlobalGraph(mdCallee, calleeParamFlowNode);
1516 if (newCalleeCompLoc != null) {
1517 calleeGlobalGraph.addMapLocationToInferCompositeLocation(calleeParamLocTuple.get(0),
1519 calleeParamFlowNode.setCompositeLocation(newCalleeCompLoc);
1523 // System.out.println("-----------------calleeParamFlowNode="
1524 // + calleeParamFlowNode.getCompositeLocation());
1535 private CompositeLocation calculateCompositeLocationFromSubGlobalGraph(MethodDescriptor md,
1536 FlowNode paramNode) {
1538 // System.out.println("#############################################################");
1539 // System.out.println("calculateCompositeLocationFromSubGlobalGraph=" + paramNode);
1541 GlobalFlowGraph subGlobalFlowGraph = getSubGlobalFlowGraph(md);
1542 NTuple<Location> paramLocTuple = translateToLocTuple(md, paramNode.getDescTuple());
1543 GlobalFlowNode paramGlobalNode = subGlobalFlowGraph.getFlowNode(paramLocTuple);
1545 List<NTuple<Location>> prefixList = calculatePrefixList(subGlobalFlowGraph, paramGlobalNode);
1547 Location prefixLoc = paramLocTuple.get(0);
1549 Set<GlobalFlowNode> reachableNodeSet =
1550 subGlobalFlowGraph.getReachableNodeSetByPrefix(paramGlobalNode.getLocTuple().get(0));
1551 // Set<GlobalFlowNode> reachNodeSet = globalFlowGraph.getReachableNodeSetFrom(node);
1553 // System.out.println("node=" + node + " prefixList=" + prefixList);
1555 for (int i = 0; i < prefixList.size(); i++) {
1556 NTuple<Location> curPrefix = prefixList.get(i);
1557 Set<NTuple<Location>> reachableCommonPrefixSet = new HashSet<NTuple<Location>>();
1559 for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
1560 GlobalFlowNode reachNode = (GlobalFlowNode) iterator2.next();
1561 if (reachNode.getLocTuple().startsWith(curPrefix)) {
1562 reachableCommonPrefixSet.add(reachNode.getLocTuple());
1565 // System.out.println("reachableCommonPrefixSet=" + reachableCommonPrefixSet);
1567 if (!reachableCommonPrefixSet.isEmpty()) {
1569 MethodDescriptor curPrefixFirstElementMethodDesc =
1570 (MethodDescriptor) curPrefix.get(0).getDescriptor();
1572 MethodDescriptor nodePrefixLocFirstElementMethodDesc =
1573 (MethodDescriptor) prefixLoc.getDescriptor();
1575 // System.out.println("curPrefixFirstElementMethodDesc=" +
1576 // curPrefixFirstElementMethodDesc);
1577 // System.out.println("nodePrefixLocFirstElementMethodDesc="
1578 // + nodePrefixLocFirstElementMethodDesc);
1580 if (curPrefixFirstElementMethodDesc.equals(nodePrefixLocFirstElementMethodDesc)
1581 || isTransitivelyCalledFrom(nodePrefixLocFirstElementMethodDesc,
1582 curPrefixFirstElementMethodDesc)) {
1585 // if (!node.getLocTuple().startsWith(curPrefix.get(0))) {
1587 Location curPrefixLocalLoc = curPrefix.get(0);
1588 if (subGlobalFlowGraph.mapLocationToInferCompositeLocation.containsKey(curPrefixLocalLoc)) {
1589 // in this case, the local variable of the current prefix has already got a composite
1591 // so we just ignore the current composite location.
1593 // System.out.println("HERE WE DO NOT ASSIGN A COMPOSITE LOCATION TO =" + node
1594 // + " DUE TO " + curPrefix);
1598 if (!needToGenerateCompositeLocation(paramGlobalNode, curPrefix)) {
1599 // System.out.println("NO NEED TO GENERATE COMP LOC to " + paramGlobalNode
1600 // + " with prefix=" + curPrefix);
1604 Location targetLocalLoc = paramGlobalNode.getLocTuple().get(0);
1605 CompositeLocation newCompLoc = generateCompositeLocation(curPrefix);
1606 // System.out.println("NEED TO ASSIGN COMP LOC TO " + paramGlobalNode + " with prefix="
1608 // System.out.println("-targetLocalLoc=" + targetLocalLoc + " - newCompLoc=" +
1611 // makes sure that a newly generated location appears in the hierarchy graph
1612 for (int compIdx = 0; compIdx < newCompLoc.getSize(); compIdx++) {
1613 Location curLoc = newCompLoc.get(compIdx);
1614 getHierarchyGraph(curLoc.getDescriptor()).getHNode(curLoc.getLocDescriptor());
1617 subGlobalFlowGraph.addMapLocationToInferCompositeLocation(targetLocalLoc, newCompLoc);
1629 private int getParamIdx(CompositeLocation compLoc,
1630 Map<Integer, NTuple<Descriptor>> mapIdxToArgTuple) {
1632 // if the composite location is started with the argument descriptor
1633 // return the argument's index. o.t. return -1
1635 Set<Integer> keySet = mapIdxToArgTuple.keySet();
1636 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
1637 Integer key = (Integer) iterator.next();
1638 NTuple<Descriptor> argTuple = mapIdxToArgTuple.get(key);
1639 if (argTuple.size() > 0 && translateToDescTuple(compLoc.getTuple()).startsWith(argTuple)) {
1640 // System.out.println("compLoc.getTuple=" + compLoc + " is started with " + argTuple);
1641 return key.intValue();
1648 private boolean isPrimitiveType(NTuple<Descriptor> argTuple) {
1650 Descriptor lastDesc = argTuple.get(argTuple.size() - 1);
1652 if (lastDesc instanceof FieldDescriptor) {
1653 return ((FieldDescriptor) lastDesc).getType().isPrimitive();
1654 } else if (lastDesc instanceof VarDescriptor) {
1655 return ((VarDescriptor) lastDesc).getType().isPrimitive();
1656 } else if (lastDesc instanceof InterDescriptor) {
1663 private CompositeLocation translateCompositeLocationToCallee(CompositeLocation callerCompLoc,
1664 NTuple<Location> baseLocTuple, MethodDescriptor mdCallee) {
1666 CompositeLocation newCalleeCompLoc = new CompositeLocation();
1668 Location calleeThisLoc = new Location(mdCallee, mdCallee.getThis());
1669 newCalleeCompLoc.addLocation(calleeThisLoc);
1671 // remove the base tuple from the caller
1672 // ex; In the method invoation foo.bar.methodA(), the callee will have the composite location
1673 // ,which is relative to the 'this' variable, <THIS,...>
1674 for (int i = baseLocTuple.size(); i < callerCompLoc.getSize(); i++) {
1675 newCalleeCompLoc.addLocation(callerCompLoc.get(i));
1678 return newCalleeCompLoc;
1682 private void calculateGlobalValueFlowCompositeLocation() {
1684 System.out.println("SSJAVA: Calculate composite locations in the global value flow graph");
1685 MethodDescriptor methodDescEventLoop = ssjava.getMethodContainingSSJavaLoop();
1686 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(methodDescEventLoop);
1688 Set<Location> calculatedPrefixSet = new HashSet<Location>();
1690 Set<GlobalFlowNode> nodeSet = globalFlowGraph.getNodeSet();
1692 next: for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
1693 GlobalFlowNode node = (GlobalFlowNode) iterator.next();
1695 Location prefixLoc = node.getLocTuple().get(0);
1697 if (calculatedPrefixSet.contains(prefixLoc)) {
1698 // the prefix loc has been already assigned to a composite location
1702 calculatedPrefixSet.add(prefixLoc);
1704 // Set<GlobalFlowNode> incomingNodeSet = globalFlowGraph.getIncomingNodeSet(node);
1705 List<NTuple<Location>> prefixList = calculatePrefixList(globalFlowGraph, node);
1707 Set<GlobalFlowNode> reachableNodeSet =
1708 globalFlowGraph.getReachableNodeSetByPrefix(node.getLocTuple().get(0));
1709 // Set<GlobalFlowNode> reachNodeSet = globalFlowGraph.getReachableNodeSetFrom(node);
1711 // System.out.println("node=" + node + " prefixList=" + prefixList);
1712 // System.out.println("---prefixList=" + prefixList);
1714 nextprefix: for (int i = 0; i < prefixList.size(); i++) {
1715 NTuple<Location> curPrefix = prefixList.get(i);
1716 // System.out.println("---curPrefix=" + curPrefix);
1717 Set<NTuple<Location>> reachableCommonPrefixSet = new HashSet<NTuple<Location>>();
1719 for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
1720 GlobalFlowNode reachNode = (GlobalFlowNode) iterator2.next();
1721 if (reachNode.getLocTuple().startsWith(curPrefix)) {
1722 reachableCommonPrefixSet.add(reachNode.getLocTuple());
1725 // System.out.println("reachableCommonPrefixSet=" + reachableCommonPrefixSet);
1727 if (!reachableCommonPrefixSet.isEmpty()) {
1729 MethodDescriptor curPrefixFirstElementMethodDesc =
1730 (MethodDescriptor) curPrefix.get(0).getDescriptor();
1732 MethodDescriptor nodePrefixLocFirstElementMethodDesc =
1733 (MethodDescriptor) prefixLoc.getDescriptor();
1735 // System.out.println("curPrefixFirstElementMethodDesc=" +
1736 // curPrefixFirstElementMethodDesc);
1737 // System.out.println("nodePrefixLocFirstElementMethodDesc="
1738 // + nodePrefixLocFirstElementMethodDesc);
1740 if (curPrefixFirstElementMethodDesc.equals(nodePrefixLocFirstElementMethodDesc)
1741 || isTransitivelyCalledFrom(nodePrefixLocFirstElementMethodDesc,
1742 curPrefixFirstElementMethodDesc)) {
1745 // if (!node.getLocTuple().startsWith(curPrefix.get(0))) {
1747 Location curPrefixLocalLoc = curPrefix.get(0);
1748 if (globalFlowGraph.mapLocationToInferCompositeLocation.containsKey(curPrefixLocalLoc)) {
1749 // in this case, the local variable of the current prefix has already got a composite
1751 // so we just ignore the current composite location.
1753 // System.out.println("HERE WE DO NOT ASSIGN A COMPOSITE LOCATION TO =" + node
1754 // + " DUE TO " + curPrefix);
1759 if (!needToGenerateCompositeLocation(node, curPrefix)) {
1760 // System.out.println("NO NEED TO GENERATE COMP LOC to " + node + " with prefix="
1762 // System.out.println("prefixList=" + prefixList);
1763 // System.out.println("reachableNodeSet=" + reachableNodeSet);
1764 continue nextprefix;
1767 Location targetLocalLoc = node.getLocTuple().get(0);
1768 CompositeLocation newCompLoc = generateCompositeLocation(curPrefix);
1769 // System.out.println("NEED TO ASSIGN COMP LOC TO " + node + " with prefix=" +
1771 // System.out.println("-targetLocalLoc=" + targetLocalLoc + " - newCompLoc="
1773 globalFlowGraph.addMapLocationToInferCompositeLocation(targetLocalLoc, newCompLoc);
1776 // if (node.getLocTuple().get(0).getDescriptor().getSymbol().equals("get_scale_factors")
1777 // || node.getLocTuple().get(0).getDescriptor().getSymbol()
1778 // .equals("get_LSF_scale_data")){
1779 // Set<GlobalFlowNode> debugInNodeSet =
1780 // globalFlowGraph.debug_getIncomingNodeSetFromPrefix(node, curPrefix);
1794 private boolean checkFlowNodeReturnThisField(MethodDescriptor md) {
1796 MethodDescriptor methodDescEventLoop = ssjava.getMethodContainingSSJavaLoop();
1797 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(methodDescEventLoop);
1799 FlowGraph flowGraph = getFlowGraph(md);
1801 ClassDescriptor enclosingDesc = getClassTypeDescriptor(md.getThis());
1802 if (enclosingDesc == null) {
1807 Set<FlowNode> returnNodeSet = flowGraph.getReturnNodeSet();
1808 Set<GlobalFlowNode> globalReturnNodeSet = new HashSet<GlobalFlowNode>();
1809 for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
1810 FlowNode flowNode = (FlowNode) iterator.next();
1811 NTuple<Location> locTuple = translateToLocTuple(md, flowNode.getDescTuple());
1812 GlobalFlowNode globalReturnNode = globalFlowGraph.getFlowNode(locTuple);
1813 globalReturnNodeSet.add(globalReturnNode);
1815 List<NTuple<Location>> prefixList = calculatePrefixList(globalFlowGraph, globalReturnNode);
1816 for (int i = 0; i < prefixList.size(); i++) {
1817 NTuple<Location> curPrefix = prefixList.get(i);
1818 ClassDescriptor cd =
1819 getClassTypeDescriptor(curPrefix.get(curPrefix.size() - 1).getLocDescriptor());
1820 if (cd != null && cd.equals(enclosingDesc)) {
1828 if (count == returnNodeSet.size()) {
1829 // in this case, all return nodes in the method returns values coming from a location that
1830 // starts with "this"
1832 // System.out.println("$$$SET RETURN LOC TRUE=" + md);
1833 mapMethodDescriptorToCompositeReturnCase.put(md, Boolean.TRUE);
1835 // NameDescriptor returnLocDesc = new NameDescriptor("RLOC" + (locSeed++));
1836 // NTuple<Descriptor> rDescTuple = new NTuple<Descriptor>();
1837 // rDescTuple.add(md.getThis());
1838 // rDescTuple.add(returnLocDesc);
1840 // for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
1841 // FlowNode rnode = (FlowNode) iterator.next();
1842 // flowGraph.addValueFlowEdge(rnode.getDescTuple(), rDescTuple);
1845 // getMethodSummary(md).setRETURNLoc(new CompositeLocation(translateToLocTuple(md,
1849 mapMethodDescriptorToCompositeReturnCase.put(md, Boolean.FALSE);
1852 return mapMethodDescriptorToCompositeReturnCase.get(md).booleanValue();
1856 private boolean needToGenerateCompositeLocation(GlobalFlowNode node, NTuple<Location> curPrefix) {
1857 // return true if there is a path between a node to which we want to give a composite location
1858 // and nodes which start with curPrefix
1860 // System.out.println("---needToGenerateCompositeLocation curPrefix=" + curPrefix);
1862 Location targetLocalLoc = node.getLocTuple().get(0);
1864 MethodDescriptor md = (MethodDescriptor) targetLocalLoc.getDescriptor();
1865 FlowGraph flowGraph = getFlowGraph(md);
1867 FlowNode flowNode = flowGraph.getFlowNode(node.getDescTuple());
1868 Set<FlowNode> reachableSet = flowGraph.getReachFlowNodeSetFrom(flowNode);
1870 Set<FlowNode> paramNodeSet = flowGraph.getParamFlowNodeSet();
1871 for (Iterator iterator = paramNodeSet.iterator(); iterator.hasNext();) {
1872 FlowNode paramFlowNode = (FlowNode) iterator.next();
1873 if (curPrefix.startsWith(translateToLocTuple(md, paramFlowNode.getDescTuple()))) {
1878 if (targetLocalLoc.getLocDescriptor() instanceof InterDescriptor) {
1879 Pair<MethodInvokeNode, Integer> pair =
1880 ((InterDescriptor) targetLocalLoc.getLocDescriptor()).getMethodArgIdxPair();
1883 // System.out.println("$$$TARGETLOCALLOC HOLDER=" + targetLocalLoc);
1885 MethodInvokeNode min = pair.getFirst();
1886 Integer paramIdx = pair.getSecond();
1887 MethodDescriptor mdCallee = min.getMethod();
1889 FlowNode paramNode = getFlowGraph(mdCallee).getParamFlowNode(paramIdx);
1890 if (checkNodeReachToReturnNode(mdCallee, paramNode)) {
1898 GlobalFlowGraph subGlobalFlowGraph = getSubGlobalFlowGraph(md);
1899 Set<GlobalFlowNode> subGlobalReachableSet = subGlobalFlowGraph.getReachableNodeSetFrom(node);
1901 if (!md.isStatic()) {
1902 ClassDescriptor currentMethodThisType = getClassTypeDescriptor(md.getThis());
1903 for (int i = 0; i < curPrefix.size(); i++) {
1904 ClassDescriptor prefixType = getClassTypeDescriptor(curPrefix.get(i).getLocDescriptor());
1905 if (prefixType != null && prefixType.equals(currentMethodThisType)) {
1906 // System.out.println("PREFIX TYPE MATCHES WITH=" + currentMethodThisType);
1908 if (mapMethodDescriptorToCompositeReturnCase.containsKey(md)) {
1909 boolean hasCompReturnLocWithThis =
1910 mapMethodDescriptorToCompositeReturnCase.get(md).booleanValue();
1911 if (hasCompReturnLocWithThis) {
1912 if (checkNodeReachToReturnNode(md, flowNode)) {
1918 for (Iterator iterator3 = subGlobalReachableSet.iterator(); iterator3.hasNext();) {
1919 GlobalFlowNode subGlobalReachalbeNode = (GlobalFlowNode) iterator3.next();
1920 if (subGlobalReachalbeNode.getLocTuple().get(0).getLocDescriptor().equals(md.getThis())) {
1921 // System.out.println("PREFIX FOUND=" + subGlobalReachalbeNode);
1929 Location lastLocationOfPrefix = curPrefix.get(curPrefix.size() - 1);
1930 // check whether prefix appears in the list of parameters
1931 Set<MethodInvokeNode> minSet = mapMethodDescToMethodInvokeNodeSet.get(md);
1932 // System.out.println("$$$md=" + md + " minSet=" + minSet);
1933 if (minSet == null) {
1936 found: for (Iterator iterator = minSet.iterator(); iterator.hasNext();) {
1937 MethodInvokeNode min = (MethodInvokeNode) iterator.next();
1938 Map<Integer, NTuple<Descriptor>> map = mapMethodInvokeNodeToArgIdxMap.get(min);
1939 Set<Integer> keySet = map.keySet();
1940 // System.out.println("min=" + min.printNode(0));
1942 for (Iterator iterator2 = keySet.iterator(); iterator2.hasNext();) {
1943 Integer argIdx = (Integer) iterator2.next();
1944 NTuple<Descriptor> argTuple = map.get(argIdx);
1946 if (!(!md.isStatic() && argIdx == 0)) {
1947 // if the argTuple is empty, we don't need to do with anything(LITERAL CASE).
1948 if (argTuple.size() > 0
1949 && argTuple.get(argTuple.size() - 1).equals(lastLocationOfPrefix.getLocDescriptor())) {
1950 NTuple<Location> locTuple =
1951 translateToLocTuple(md, flowGraph.getParamFlowNode(argIdx).getDescTuple());
1952 lastLocationOfPrefix = locTuple.get(0);
1953 // System.out.println("ARG CASE=" + locTuple);
1954 for (Iterator iterator3 = subGlobalReachableSet.iterator(); iterator3.hasNext();) {
1955 GlobalFlowNode subGlobalReachalbeNode = (GlobalFlowNode) iterator3.next();
1956 // NTuple<Location> locTuple = translateToLocTuple(md, reachalbeNode.getDescTuple());
1957 NTuple<Location> globalReachlocTuple = subGlobalReachalbeNode.getLocTuple();
1958 for (int i = 0; i < globalReachlocTuple.size(); i++) {
1959 if (globalReachlocTuple.get(i).equals(lastLocationOfPrefix)) {
1960 // System.out.println("ARG " + argTuple + " IS MATCHED WITH="
1961 // + lastLocationOfPrefix);
1974 private boolean checkNodeReachToReturnNode(MethodDescriptor md, FlowNode node) {
1976 FlowGraph flowGraph = getFlowGraph(md);
1977 Set<FlowNode> reachableSet = flowGraph.getReachFlowNodeSetFrom(node);
1978 if (mapMethodDescriptorToCompositeReturnCase.containsKey(md)) {
1979 boolean hasCompReturnLocWithThis =
1980 mapMethodDescriptorToCompositeReturnCase.get(md).booleanValue();
1982 if (hasCompReturnLocWithThis) {
1983 for (Iterator iterator = flowGraph.getReturnNodeSet().iterator(); iterator.hasNext();) {
1984 FlowNode returnFlowNode = (FlowNode) iterator.next();
1985 if (reachableSet.contains(returnFlowNode)) {
1994 private void assignCompositeLocation(CompositeLocation compLocPrefix, GlobalFlowNode node) {
1995 CompositeLocation newCompLoc = compLocPrefix.clone();
1996 NTuple<Location> locTuple = node.getLocTuple();
1997 for (int i = 1; i < locTuple.size(); i++) {
1998 newCompLoc.addLocation(locTuple.get(i));
2000 node.setInferCompositeLocation(newCompLoc);
2003 private List<NTuple<Location>> calculatePrefixList(GlobalFlowGraph graph, GlobalFlowNode node) {
2005 // System.out.println("\n##### calculatePrefixList node=" + node);
2007 Set<GlobalFlowNode> incomingNodeSetPrefix =
2008 graph.getIncomingNodeSetByPrefix(node.getLocTuple().get(0));
2009 // System.out.println("---incomingNodeSetPrefix=" + incomingNodeSetPrefix);
2011 Set<GlobalFlowNode> reachableNodeSetPrefix =
2012 graph.getReachableNodeSetByPrefix(node.getLocTuple().get(0));
2013 // System.out.println("---reachableNodeSetPrefix=" + reachableNodeSetPrefix);
2015 List<NTuple<Location>> prefixList = new ArrayList<NTuple<Location>>();
2017 for (Iterator iterator = incomingNodeSetPrefix.iterator(); iterator.hasNext();) {
2018 GlobalFlowNode inNode = (GlobalFlowNode) iterator.next();
2019 NTuple<Location> inNodeTuple = inNode.getLocTuple();
2021 if (inNodeTuple.get(0).getLocDescriptor() instanceof InterDescriptor
2022 || inNodeTuple.get(0).getLocDescriptor().equals(GLOBALDESC)) {
2026 for (int i = 1; i < inNodeTuple.size(); i++) {
2027 NTuple<Location> prefix = inNodeTuple.subList(0, i);
2028 if (!prefixList.contains(prefix)) {
2029 prefixList.add(prefix);
2034 Collections.sort(prefixList, new Comparator<NTuple<Location>>() {
2035 public int compare(NTuple<Location> arg0, NTuple<Location> arg1) {
2036 int s0 = arg0.size();
2037 int s1 = arg1.size();
2040 } else if (s0 == s1) {
2052 private CompositeLocation calculateCompositeLocationFromFlowGraph(MethodDescriptor md,
2055 // System.out.println("#############################################################");
2056 // System.out.println("calculateCompositeLocationFromFlowGraph=" + node);
2058 FlowGraph flowGraph = getFlowGraph(md);
2059 // NTuple<Location> paramLocTuple = translateToLocTuple(md, paramNode.getDescTuple());
2060 // GlobalFlowNode paramGlobalNode = subGlobalFlowGraph.getFlowNode(paramLocTuple);
2062 List<NTuple<Location>> prefixList = calculatePrefixListFlowGraph(flowGraph, node);
2064 // Set<GlobalFlowNode> reachableNodeSet =
2065 // subGlobalFlowGraph.getReachableNodeSetByPrefix(paramGlobalNode.getLocTuple().get(0));
2067 Set<FlowNode> reachableNodeSet =
2068 flowGraph.getReachableSetFrom(node.getDescTuple().subList(0, 1));
2070 // Set<GlobalFlowNode> reachNodeSet = globalFlowGraph.getReachableNodeSetFrom(node);
2072 // System.out.println("node=" + node + " prefixList=" + prefixList);
2074 for (int i = 0; i < prefixList.size(); i++) {
2075 NTuple<Location> curPrefix = prefixList.get(i);
2076 Set<NTuple<Location>> reachableCommonPrefixSet = new HashSet<NTuple<Location>>();
2078 for (Iterator iterator2 = reachableNodeSet.iterator(); iterator2.hasNext();) {
2079 FlowNode reachNode = (FlowNode) iterator2.next();
2080 NTuple<Location> reachLocTuple = translateToLocTuple(md, reachNode.getCurrentDescTuple());
2081 if (reachLocTuple.startsWith(curPrefix)) {
2082 reachableCommonPrefixSet.add(reachLocTuple);
2085 // System.out.println("reachableCommonPrefixSet=" + reachableCommonPrefixSet);
2087 if (!reachableCommonPrefixSet.isEmpty()) {
2089 MethodDescriptor curPrefixFirstElementMethodDesc =
2090 (MethodDescriptor) curPrefix.get(0).getDescriptor();
2092 Location curPrefixLocalLoc = curPrefix.get(0);
2094 Location targetLocalLoc = new Location(md, node.getDescTuple().get(0));
2095 // Location targetLocalLoc = paramGlobalNode.getLocTuple().get(0);
2097 CompositeLocation newCompLoc = generateCompositeLocation(curPrefix);
2098 // System.out.println("NEED2ASSIGN COMP LOC TO " + node + " with prefix=" + curPrefix);
2099 // System.out.println("-targetLocalLoc=" + targetLocalLoc + " - newCompLoc=" +
2102 node.setCompositeLocation(newCompLoc);
2112 private List<NTuple<Location>> calculatePrefixListFlowGraph(FlowGraph graph, FlowNode node) {
2114 // System.out.println("\n##### calculatePrefixList node=" + node);
2116 MethodDescriptor md = graph.getMethodDescriptor();
2117 Set<FlowNode> incomingNodeSetPrefix =
2118 graph.getIncomingNodeSetByPrefix(node.getDescTuple().get(0));
2119 // System.out.println("---incomingNodeSetPrefix=" + incomingNodeSetPrefix);
2121 Set<FlowNode> reachableNodeSetPrefix =
2122 graph.getReachableSetFrom(node.getDescTuple().subList(0, 1));
2123 // System.out.println("---reachableNodeSetPrefix=" + reachableNodeSetPrefix);
2125 List<NTuple<Location>> prefixList = new ArrayList<NTuple<Location>>();
2127 for (Iterator iterator = incomingNodeSetPrefix.iterator(); iterator.hasNext();) {
2128 FlowNode inNode = (FlowNode) iterator.next();
2129 NTuple<Location> inNodeTuple = translateToLocTuple(md, inNode.getCurrentDescTuple());
2131 // if (inNodeTuple.get(0).getLocDescriptor() instanceof InterDescriptor
2132 // || inNodeTuple.get(0).getLocDescriptor().equals(GLOBALDESC)) {
2136 for (int i = 1; i < inNodeTuple.size(); i++) {
2137 NTuple<Location> prefix = inNodeTuple.subList(0, i);
2138 if (!prefixList.contains(prefix)) {
2139 prefixList.add(prefix);
2144 Collections.sort(prefixList, new Comparator<NTuple<Location>>() {
2145 public int compare(NTuple<Location> arg0, NTuple<Location> arg1) {
2146 int s0 = arg0.size();
2147 int s1 = arg1.size();
2150 } else if (s0 == s1) {
2162 private GlobalFlowGraph constructSubGlobalFlowGraph(FlowGraph flowGraph) {
2164 MethodDescriptor md = flowGraph.getMethodDescriptor();
2166 GlobalFlowGraph globalGraph = getSubGlobalFlowGraph(md);
2168 // Set<FlowNode> nodeSet = flowGraph.getNodeSet();
2169 Set<FlowEdge> edgeSet = flowGraph.getEdgeSet();
2171 for (Iterator iterator = edgeSet.iterator(); iterator.hasNext();) {
2173 FlowEdge edge = (FlowEdge) iterator.next();
2174 NTuple<Descriptor> srcDescTuple = edge.getInitTuple();
2175 NTuple<Descriptor> dstDescTuple = edge.getEndTuple();
2177 if (flowGraph.getFlowNode(srcDescTuple) instanceof FlowReturnNode
2178 || flowGraph.getFlowNode(dstDescTuple) instanceof FlowReturnNode) {
2182 // here only keep the first element(method location) of the descriptor
2184 NTuple<Location> srcLocTuple = translateToLocTuple(md, srcDescTuple);
2185 NTuple<Location> dstLocTuple = translateToLocTuple(md, dstDescTuple);
2187 globalGraph.addValueFlowEdge(srcLocTuple, dstLocTuple);
2194 private NTuple<Location> translateToLocTuple(MethodDescriptor md, NTuple<Descriptor> descTuple) {
2196 NTuple<Location> locTuple = new NTuple<Location>();
2198 Descriptor enclosingDesc = md;
2199 for (int i = 0; i < descTuple.size(); i++) {
2200 Descriptor desc = descTuple.get(i);
2202 Location loc = new Location(enclosingDesc, desc);
2205 if (desc instanceof VarDescriptor) {
2206 enclosingDesc = ((VarDescriptor) desc).getType().getClassDesc();
2207 } else if (desc instanceof FieldDescriptor) {
2208 enclosingDesc = ((FieldDescriptor) desc).getType().getClassDesc();
2210 enclosingDesc = desc;
2219 private void addValueFlowsFromCalleeSubGlobalFlowGraph(MethodDescriptor mdCaller) {
2221 // the transformation for a call site propagates flows through parameters
2222 // if the method is virtual, it also grab all relations from any possible
2225 Set<MethodInvokeNode> setMethodInvokeNode = getMethodInvokeNodeSet(mdCaller);
2227 for (Iterator iterator = setMethodInvokeNode.iterator(); iterator.hasNext();) {
2228 MethodInvokeNode min = (MethodInvokeNode) iterator.next();
2229 MethodDescriptor mdCallee = min.getMethod();
2230 Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
2231 if (mdCallee.isStatic()) {
2232 setPossibleCallees.add(mdCallee);
2234 Set<MethodDescriptor> calleeSet = ssjava.getCallGraph().getMethods(mdCallee);
2235 // removes method descriptors that are not invoked by the caller
2236 calleeSet.retainAll(mapMethodToCalleeSet.get(mdCaller));
2237 setPossibleCallees.addAll(calleeSet);
2240 for (Iterator iterator2 = setPossibleCallees.iterator(); iterator2.hasNext();) {
2241 MethodDescriptor possibleMdCallee = (MethodDescriptor) iterator2.next();
2242 propagateValueFlowsToCallerFromSubGlobalFlowGraph(min, mdCaller, possibleMdCallee);
2249 private void propagateValueFlowsToCallerFromSubGlobalFlowGraph(MethodInvokeNode min,
2250 MethodDescriptor mdCaller, MethodDescriptor possibleMdCallee) {
2252 // System.out.println("---propagate from " + min.printNode(0) + " to caller=" + mdCaller);
2253 FlowGraph calleeFlowGraph = getFlowGraph(possibleMdCallee);
2254 Map<Integer, NTuple<Descriptor>> mapIdxToArg = mapMethodInvokeNodeToArgIdxMap.get(min);
2256 // System.out.println("-----mapMethodInvokeNodeToArgIdxMap.get(min)="
2257 // + mapMethodInvokeNodeToArgIdxMap.get(min));
2259 Set<Integer> keySet = mapIdxToArg.keySet();
2260 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2261 Integer idx = (Integer) iterator.next();
2262 NTuple<Descriptor> argDescTuple = mapIdxToArg.get(idx);
2263 if (argDescTuple.size() > 0) {
2264 NTuple<Location> argLocTuple = translateToLocTuple(mdCaller, argDescTuple);
2265 NTuple<Descriptor> paramDescTuple = calleeFlowGraph.getParamFlowNode(idx).getDescTuple();
2266 NTuple<Location> paramLocTuple = translateToLocTuple(possibleMdCallee, paramDescTuple);
2267 // System.out.println("-------paramDescTuple=" + paramDescTuple + "->argDescTuple="
2269 addMapCallerArgToCalleeParam(min, argDescTuple, paramDescTuple);
2273 // addValueFlowBetweenParametersToCaller(min, mdCaller, possibleMdCallee);
2275 NTuple<Descriptor> baseTuple = mapMethodInvokeNodeToBaseTuple.get(min);
2276 GlobalFlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(possibleMdCallee);
2277 Set<GlobalFlowNode> calleeNodeSet = calleeSubGlobalGraph.getNodeSet();
2278 for (Iterator iterator = calleeNodeSet.iterator(); iterator.hasNext();) {
2279 GlobalFlowNode calleeNode = (GlobalFlowNode) iterator.next();
2280 addValueFlowFromCalleeNode(min, mdCaller, possibleMdCallee, calleeNode);
2283 // System.out.println("$$$GLOBAL PC LOC ADD=" + mdCaller);
2284 Set<NTuple<Location>> pcLocTupleSet = mapMethodInvokeNodeToPCLocTupleSet.get(min);
2285 // System.out.println("---pcLocTupleSet=" + pcLocTupleSet);
2286 GlobalFlowGraph callerSubGlobalGraph = getSubGlobalFlowGraph(mdCaller);
2287 for (Iterator iterator = calleeNodeSet.iterator(); iterator.hasNext();) {
2288 GlobalFlowNode calleeNode = (GlobalFlowNode) iterator.next();
2289 if (calleeNode.isParamNodeWithIncomingFlows()) {
2290 // System.out.println("calleeNode.getLocTuple()" + calleeNode.getLocTuple());
2291 NTuple<Location> callerSrcNodeLocTuple =
2292 translateToCallerLocTuple(min, possibleMdCallee, mdCaller, calleeNode.getLocTuple());
2293 // System.out.println("---callerSrcNodeLocTuple=" + callerSrcNodeLocTuple);
2294 if (callerSrcNodeLocTuple != null && callerSrcNodeLocTuple.size() > 0) {
2295 for (Iterator iterator2 = pcLocTupleSet.iterator(); iterator2.hasNext();) {
2296 NTuple<Location> pcLocTuple = (NTuple<Location>) iterator2.next();
2298 callerSubGlobalGraph.addValueFlowEdge(pcLocTuple, callerSrcNodeLocTuple);
2307 private void addValueFlowFromCalleeNode(MethodInvokeNode min, MethodDescriptor mdCaller,
2308 MethodDescriptor mdCallee, GlobalFlowNode calleeSrcNode) {
2310 GlobalFlowGraph calleeSubGlobalGraph = getSubGlobalFlowGraph(mdCallee);
2311 GlobalFlowGraph callerSubGlobalGraph = getSubGlobalFlowGraph(mdCaller);
2313 // System.out.println("$addValueFlowFromCalleeNode calleeSrcNode=" + calleeSrcNode);
2315 NTuple<Location> callerSrcNodeLocTuple =
2316 translateToCallerLocTuple(min, mdCallee, mdCaller, calleeSrcNode.getLocTuple());
2317 // System.out.println("---callerSrcNodeLocTuple=" + callerSrcNodeLocTuple);
2319 if (callerSrcNodeLocTuple != null && callerSrcNodeLocTuple.size() > 0) {
2321 Set<GlobalFlowNode> outNodeSet = calleeSubGlobalGraph.getOutNodeSet(calleeSrcNode);
2323 for (Iterator iterator = outNodeSet.iterator(); iterator.hasNext();) {
2324 GlobalFlowNode outNode = (GlobalFlowNode) iterator.next();
2325 NTuple<Location> callerDstNodeLocTuple =
2326 translateToCallerLocTuple(min, mdCallee, mdCaller, outNode.getLocTuple());
2327 // System.out.println("outNode=" + outNode + " callerDstNodeLocTuple="
2328 // + callerDstNodeLocTuple);
2329 if (callerSrcNodeLocTuple != null && callerDstNodeLocTuple != null
2330 && callerSrcNodeLocTuple.size() > 0 && callerDstNodeLocTuple.size() > 0) {
2331 callerSubGlobalGraph.addValueFlowEdge(callerSrcNodeLocTuple, callerDstNodeLocTuple);
2338 private NTuple<Location> translateToCallerLocTuple(MethodInvokeNode min,
2339 MethodDescriptor mdCallee, MethodDescriptor mdCaller, NTuple<Location> nodeLocTuple) {
2340 // this method will return the same nodeLocTuple if the corresponding argument is literal
2343 // System.out.println("translateToCallerLocTuple=" + nodeLocTuple);
2345 FlowGraph calleeFlowGraph = getFlowGraph(mdCallee);
2346 NTuple<Descriptor> nodeDescTuple = translateToDescTuple(nodeLocTuple);
2347 if (calleeFlowGraph.isParameter(nodeDescTuple)) {
2348 int paramIdx = calleeFlowGraph.getParamIdx(nodeDescTuple);
2349 NTuple<Descriptor> argDescTuple = mapMethodInvokeNodeToArgIdxMap.get(min).get(paramIdx);
2351 // if (isPrimitive(nodeLocTuple.get(0).getLocDescriptor())) {
2352 // // the type of argument is primitive.
2353 // return nodeLocTuple.clone();
2355 // System.out.println("paramIdx=" + paramIdx + " argDescTuple=" + argDescTuple + " from min="
2356 // + min.printNode(0));
2357 NTuple<Location> argLocTuple = translateToLocTuple(mdCaller, argDescTuple);
2359 NTuple<Location> callerLocTuple = new NTuple<Location>();
2361 callerLocTuple.addAll(argLocTuple);
2362 for (int i = 1; i < nodeLocTuple.size(); i++) {
2363 callerLocTuple.add(nodeLocTuple.get(i));
2365 return callerLocTuple;
2367 return nodeLocTuple.clone();
2372 public static boolean isPrimitive(Descriptor desc) {
2374 if (desc instanceof FieldDescriptor) {
2375 return ((FieldDescriptor) desc).getType().isPrimitive();
2376 } else if (desc instanceof VarDescriptor) {
2377 return ((VarDescriptor) desc).getType().isPrimitive();
2378 } else if (desc instanceof InterDescriptor) {
2385 public static boolean isReference(Descriptor desc) {
2387 if (desc instanceof FieldDescriptor) {
2389 TypeDescriptor type = ((FieldDescriptor) desc).getType();
2390 if (type.isArray()) {
2391 return !type.isPrimitive();
2393 return type.isPtr();
2396 } else if (desc instanceof VarDescriptor) {
2397 TypeDescriptor type = ((VarDescriptor) desc).getType();
2398 if (type.isArray()) {
2399 return !type.isPrimitive();
2401 return type.isPtr();
2408 private NTuple<Descriptor> translateToDescTuple(NTuple<Location> locTuple) {
2410 NTuple<Descriptor> descTuple = new NTuple<Descriptor>();
2411 for (int i = 0; i < locTuple.size(); i++) {
2412 descTuple.add(locTuple.get(i).getLocDescriptor());
2418 public LocationSummary getLocationSummary(Descriptor d) {
2419 if (!mapDescToLocationSummary.containsKey(d)) {
2420 if (d instanceof MethodDescriptor) {
2421 mapDescToLocationSummary.put(d, new MethodSummary((MethodDescriptor) d));
2422 } else if (d instanceof ClassDescriptor) {
2423 mapDescToLocationSummary.put(d, new FieldSummary());
2426 return mapDescToLocationSummary.get(d);
2429 private void generateMethodSummary() {
2431 Set<MethodDescriptor> keySet = md2lattice.keySet();
2432 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2433 MethodDescriptor md = (MethodDescriptor) iterator.next();
2435 System.out.println("\nSSJAVA: generate method summary: " + md);
2437 FlowGraph flowGraph = getFlowGraph(md);
2438 if (flowGraph == null) {
2441 MethodSummary methodSummary = getMethodSummary(md);
2443 HierarchyGraph scGraph = getSkeletonCombinationHierarchyGraph(md);
2445 // set the 'this' reference location
2446 if (!md.isStatic()) {
2447 // System.out.println("setThisLocName=" + scGraph.getHNode(md.getThis()).getName());
2448 methodSummary.setThisLocName(scGraph.getHNode(md.getThis()).getName());
2451 // set the 'global' reference location if needed
2452 if (methodSummary.hasGlobalAccess()) {
2453 methodSummary.setGlobalLocName(scGraph.getHNode(GLOBALDESC).getName());
2456 // construct a parameter mapping that maps a parameter descriptor to an
2457 // inferred composite location
2458 for (int paramIdx = 0; paramIdx < flowGraph.getNumParameters(); paramIdx++) {
2459 FlowNode flowNode = flowGraph.getParamFlowNode(paramIdx);
2460 CompositeLocation inferredCompLoc =
2461 updateCompositeLocation(flowNode.getCompositeLocation());
2462 // System.out.println("-paramIdx=" + paramIdx + " infer=" + inferredCompLoc + " original="
2463 // + flowNode.getCompositeLocation());
2465 Descriptor localVarDesc = flowNode.getDescTuple().get(0);
2466 methodSummary.addMapVarNameToInferCompLoc(localVarDesc, inferredCompLoc);
2467 methodSummary.addMapParamIdxToInferLoc(paramIdx, inferredCompLoc);
2474 private boolean hasOrderingRelation(NTuple<Location> locTuple1, NTuple<Location> locTuple2) {
2476 int size = locTuple1.size() >= locTuple2.size() ? locTuple2.size() : locTuple1.size();
2478 for (int idx = 0; idx < size; idx++) {
2479 Location loc1 = locTuple1.get(idx);
2480 Location loc2 = locTuple2.get(idx);
2482 Descriptor desc1 = loc1.getDescriptor();
2483 Descriptor desc2 = loc2.getDescriptor();
2485 if (!desc1.equals(desc2)) {
2486 throw new Error("Fail to compare " + locTuple1 + " and " + locTuple2);
2489 Descriptor locDesc1 = loc1.getLocDescriptor();
2490 Descriptor locDesc2 = loc2.getLocDescriptor();
2492 HierarchyGraph hierarchyGraph = getHierarchyGraph(desc1);
2494 HNode node1 = hierarchyGraph.getHNode(locDesc1);
2495 HNode node2 = hierarchyGraph.getHNode(locDesc2);
2497 // System.out.println("---node1=" + node1 + " node2=" + node2);
2498 // System.out.println("---hierarchyGraph.getIncomingNodeSet(node2)="
2499 // + hierarchyGraph.getIncomingNodeSet(node2));
2501 if (locDesc1.equals(locDesc2)) {
2503 } else if (!hierarchyGraph.getIncomingNodeSet(node2).contains(node1)
2504 && !hierarchyGraph.getIncomingNodeSet(node1).contains(node2)) {
2516 private boolean isHigherThan(NTuple<Location> locTuple1, NTuple<Location> locTuple2) {
2518 int size = locTuple1.size() >= locTuple2.size() ? locTuple2.size() : locTuple1.size();
2520 for (int idx = 0; idx < size; idx++) {
2521 Location loc1 = locTuple1.get(idx);
2522 Location loc2 = locTuple2.get(idx);
2524 Descriptor desc1 = loc1.getDescriptor();
2525 Descriptor desc2 = loc2.getDescriptor();
2527 if (!desc1.equals(desc2)) {
2528 throw new Error("Fail to compare " + locTuple1 + " and " + locTuple2);
2531 Descriptor locDesc1 = loc1.getLocDescriptor();
2532 Descriptor locDesc2 = loc2.getLocDescriptor();
2534 HierarchyGraph hierarchyGraph = getHierarchyGraph(desc1);
2536 HNode node1 = hierarchyGraph.getHNode(locDesc1);
2537 HNode node2 = hierarchyGraph.getHNode(locDesc2);
2539 // System.out.println("---node1=" + node1 + " node2=" + node2);
2540 // System.out.println("---hierarchyGraph.getIncomingNodeSet(node2)="
2541 // + hierarchyGraph.getIncomingNodeSet(node2));
2543 if (locDesc1.equals(locDesc2)) {
2545 } else if (hierarchyGraph.getIncomingNodeSet(node2).contains(node1)) {
2556 private void debug_writeLattices() {
2558 Set<Descriptor> keySet = mapDescriptorToSkeletonLattice.keySet();
2559 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2560 Descriptor key = (Descriptor) iterator.next();
2561 SSJavaLattice<String> skeletonLattice = mapDescriptorToSkeletonLattice.get(key);
2562 // HierarchyGraph simpleHierarchyGraph = getSimpleHierarchyGraph(key);
2563 HierarchyGraph scHierarchyGraph = getSkeletonCombinationHierarchyGraph(key);
2564 if (key instanceof ClassDescriptor) {
2565 writeInferredLatticeDotFile((ClassDescriptor) key, skeletonLattice, "_SKELETON");
2566 } else if (key instanceof MethodDescriptor) {
2567 MethodDescriptor md = (MethodDescriptor) key;
2568 writeInferredLatticeDotFile(md.getClassDesc(), md, skeletonLattice, "_SKELETON");
2571 LocationSummary ls = getLocationSummary(key);
2572 // System.out.println("####LOC SUMMARY=" + key + "\n" + ls.getMapHNodeNameToLocationName());
2575 Set<ClassDescriptor> cdKeySet = cd2lattice.keySet();
2576 for (Iterator iterator = cdKeySet.iterator(); iterator.hasNext();) {
2577 ClassDescriptor cd = (ClassDescriptor) iterator.next();
2578 // System.out.println("########cd=" + cd);
2579 writeInferredLatticeDotFile((ClassDescriptor) cd, cd2lattice.get(cd), "");
2580 COUNT += cd2lattice.get(cd).getKeySet().size();
2583 Set<MethodDescriptor> mdKeySet = md2lattice.keySet();
2584 for (Iterator iterator = mdKeySet.iterator(); iterator.hasNext();) {
2585 MethodDescriptor md = (MethodDescriptor) iterator.next();
2586 writeInferredLatticeDotFile(md.getClassDesc(), md, md2lattice.get(md), "");
2587 COUNT += md2lattice.get(md).getKeySet().size();
2589 System.out.println("###COUNT=" + COUNT);
2591 Set<Descriptor> descKeySet = desc2naiveLattice.keySet();
2592 for (Iterator iterator = descKeySet.iterator(); iterator.hasNext();) {
2593 Descriptor desc = (Descriptor) iterator.next();
2594 // System.out.println("########cd=" + cd);
2596 ClassDescriptor cd_naive;
2597 MethodDescriptor md_naive;
2598 if (desc instanceof ClassDescriptor) {
2599 cd_naive = (ClassDescriptor) desc;
2602 md_naive = (MethodDescriptor) desc;
2603 cd_naive = md_naive.getClassDesc();
2606 writeInferredLatticeDotFile(cd_naive, md_naive, desc2naiveLattice.get(desc), "_naive");
2610 private void buildLattice(Descriptor desc) {
2611 // System.out.println("buildLattice=" + desc);
2612 SSJavaLattice<String> skeletonLattice = buildLattice.buildLattice(desc);
2614 addMapDescToSkeletonLattice(desc, skeletonLattice);
2616 // write a dot file before everything is done
2617 if (desc instanceof ClassDescriptor) {
2618 writeInferredLatticeDotFile((ClassDescriptor) desc, null, skeletonLattice, "_SC");
2620 MethodDescriptor md = (MethodDescriptor) desc;
2621 writeInferredLatticeDotFile(md.getClassDesc(), md, skeletonLattice, "_SC");
2624 HierarchyGraph simpleHierarchyGraph = getSimpleHierarchyGraph(desc);
2626 // System.out.println("\n## insertIntermediateNodesToStraightLine:"
2627 // + simpleHierarchyGraph.getName());
2628 SSJavaLattice<String> lattice =
2629 buildLattice.insertIntermediateNodesToStraightLine(desc, skeletonLattice);
2631 if (lattice == null) {
2634 lattice.removeRedundantEdges();
2636 LocationInference.numLocationsSInfer += lattice.getKeySet().size();
2638 if (desc instanceof ClassDescriptor) {
2640 cd2lattice.put((ClassDescriptor) desc, lattice);
2641 ssjava.writeLatticeDotFile((ClassDescriptor) desc, null, lattice);
2642 } else if (desc instanceof MethodDescriptor) {
2644 md2lattice.put((MethodDescriptor) desc, lattice);
2645 MethodDescriptor md = (MethodDescriptor) desc;
2646 ClassDescriptor cd = md.getClassDesc();
2647 ssjava.writeLatticeDotFile(cd, md, lattice);
2652 // deprecated: it builds method/class lattices without considering class inheritance
2653 private void buildLattice() {
2655 Set<Descriptor> keySet = mapDescriptorToCombineSkeletonHierarchyGraph.keySet();
2656 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2657 Descriptor desc = (Descriptor) iterator.next();
2659 SSJavaLattice<String> simpleLattice = buildLattice.buildLattice(desc);
2661 addMapDescToSkeletonLattice(desc, simpleLattice);
2663 HierarchyGraph simpleHierarchyGraph = getSimpleHierarchyGraph(desc);
2664 System.out.println("\n## insertIntermediateNodesToStraightLine:"
2665 + simpleHierarchyGraph.getName());
2666 SSJavaLattice<String> lattice =
2667 buildLattice.insertIntermediateNodesToStraightLine(desc, simpleLattice);
2668 lattice.removeRedundantEdges();
2670 LocationInference.numLocationsSInfer += lattice.getKeySet().size();
2672 if (desc instanceof ClassDescriptor) {
2674 cd2lattice.put((ClassDescriptor) desc, lattice);
2675 // ssjava.writeLatticeDotFile((ClassDescriptor) desc, null, lattice);
2676 } else if (desc instanceof MethodDescriptor) {
2678 md2lattice.put((MethodDescriptor) desc, lattice);
2679 MethodDescriptor md = (MethodDescriptor) desc;
2680 ClassDescriptor cd = md.getClassDesc();
2681 // ssjava.writeLatticeDotFile(cd, md, lattice);
2688 private void buildLatticeInheritanceTree() {
2689 // DFS the inheritance tree and propagates lattice nodes/edges from the parent to children
2690 // Node<ClassDescriptor> rootNode = inheritanceTree.getRootNode();
2691 DFSBuildLatticeInheritanceTree(rootClassDescriptor);
2694 public Set<ClassDescriptor> getDirectSubClasses(ClassDescriptor parent) {
2696 Set<ClassDescriptor> result = new HashSet<ClassDescriptor>();
2698 Set<ClassDescriptor> children = tu.getDirectSubClasses(parent);
2699 if (children == null) {
2700 children = new HashSet<ClassDescriptor>();
2703 for (Iterator iterator = children.iterator(); iterator.hasNext();) {
2704 ClassDescriptor child = (ClassDescriptor) iterator.next();
2705 if (toanalyze_classDescSet.contains(child)) {
2713 private void DFSBuildLatticeInheritanceTree(ClassDescriptor cd) {
2714 // ClassDescriptor cd = node.getData();
2716 ClassDescriptor parentClassDesc = cd.getSuperDesc();
2717 if (parentClassDesc != null) {
2718 Map<TripleItem, String> parentMap = buildLattice.getIntermediateLocMap(parentClassDesc);
2719 buildLattice.setIntermediateLocMap(cd, parentMap);
2724 for (Iterator iterator = cd.getMethods(); iterator.hasNext();) {
2725 MethodDescriptor md = (MethodDescriptor) iterator.next();
2726 if (toanalyze_methodDescList.contains(md)) {
2727 MethodDescriptor parentMethodDesc = getParentMethodDesc(md.getClassDesc(), md);
2728 if (parentMethodDesc != null) {
2729 Map<TripleItem, String> parentMap = buildLattice.getIntermediateLocMap(parentMethodDesc);
2730 Map<TripleItem, String> childMap = new HashMap<TripleItem, String>();
2731 Set<TripleItem> keySet = parentMap.keySet();
2732 for (Iterator iterator2 = keySet.iterator(); iterator2.hasNext();) {
2733 TripleItem key = (TripleItem) iterator2.next();
2734 childMap.put(key, parentMap.get(key));
2736 buildLattice.setIntermediateLocMap(md, childMap);
2742 // traverse children
2743 Set<ClassDescriptor> children = tu.getDirectSubClasses(cd);
2744 if (children != null) {
2745 for (Iterator iterator = children.iterator(); iterator.hasNext();) {
2746 ClassDescriptor classDescriptor = (ClassDescriptor) iterator.next();
2747 if (toanalyze_classDescSet.contains(classDescriptor)) {
2748 DFSBuildLatticeInheritanceTree(classDescriptor);
2750 if (classDescriptor.isAbstract()) {
2751 DFSBuildLatticeInheritanceTree(classDescriptor);
2759 public void addMapDescToSkeletonLattice(Descriptor desc, SSJavaLattice<String> lattice) {
2760 mapDescriptorToSkeletonLattice.put(desc, lattice);
2763 public SSJavaLattice<String> getSkeletonLattice(Descriptor desc) {
2764 return mapDescriptorToSkeletonLattice.get(desc);
2767 private void simplifyHierarchyGraph() {
2768 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
2769 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2770 Descriptor desc = (Descriptor) iterator.next();
2771 // System.out.println("SSJAVA: remove redundant edges: " + desc);
2772 HierarchyGraph simpleHierarchyGraph = getHierarchyGraph(desc).clone();
2773 simpleHierarchyGraph.setName(desc + "_SIMPLE");
2774 simpleHierarchyGraph.removeRedundantEdges();
2775 mapDescriptorToSimpleHierarchyGraph.put(desc, simpleHierarchyGraph);
2779 private void insertCombinationNodes() {
2780 Set<Descriptor> keySet = mapDescriptorToSkeletonHierarchyGraph.keySet();
2781 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2782 Descriptor desc = (Descriptor) iterator.next();
2783 System.out.println("\nSSJAVA: Inserting Combination Nodes:" + desc);
2784 HierarchyGraph skeletonGraph = getSkeletonHierarchyGraph(desc);
2785 HierarchyGraph skeletonGraphWithCombinationNode = skeletonGraph.clone();
2786 skeletonGraphWithCombinationNode.setSCGraph(true);
2787 skeletonGraphWithCombinationNode.setName(desc + "_SC");
2789 HierarchyGraph simpleHierarchyGraph = getSimpleHierarchyGraph(desc);
2790 skeletonGraphWithCombinationNode.insertCombinationNodesToGraph(simpleHierarchyGraph);
2791 // skeletonGraphWithCombinationNode.insertCombinationNodesToGraph(simpleHierarchyGraph,
2793 // skeletonGraphWithCombinationNode.simplifySkeletonCombinationHierarchyGraph();
2794 skeletonGraphWithCombinationNode.removeRedundantEdges();
2795 mapDescriptorToCombineSkeletonHierarchyGraph.put(desc, skeletonGraphWithCombinationNode);
2799 private void constructSkeletonHierarchyGraph() {
2800 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
2801 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2802 Descriptor desc = (Descriptor) iterator.next();
2803 System.out.println("SSJAVA: Constructing Skeleton Hierarchy Graph: " + desc);
2804 HierarchyGraph simpleGraph = getSimpleHierarchyGraph(desc);
2805 HierarchyGraph skeletonGraph = simpleGraph.generateSkeletonGraph();
2806 skeletonGraph.setMapDescToHNode(simpleGraph.getMapDescToHNode());
2807 skeletonGraph.setMapHNodeToDescSet(simpleGraph.getMapHNodeToDescSet());
2808 skeletonGraph.simplifyHierarchyGraph(this);
2809 mapDescriptorToSkeletonHierarchyGraph.put(desc, skeletonGraph);
2813 private void recurUpAccumulateInheritanceDesc(Descriptor curDesc, Set<Descriptor> set) {
2815 if (curDesc instanceof ClassDescriptor) {
2816 ClassDescriptor cd = (ClassDescriptor) curDesc;
2817 ClassDescriptor parentClassDesc = cd.getSuperDesc();
2818 if (parentClassDesc != null && !parentClassDesc.equals(rootClassDescriptor)) {
2819 set.add(parentClassDesc);
2820 recurUpAccumulateInheritanceDesc(parentClassDesc, set);
2823 MethodDescriptor md = (MethodDescriptor) curDesc;
2824 ClassDescriptor cd = md.getClassDesc();
2827 ClassDescriptor parentClassDesc = cd.getSuperDesc();
2828 if (parentClassDesc != null && !parentClassDesc.equals(rootClassDescriptor)) {
2830 Set<MethodDescriptor> methodDescSet =
2831 parentClassDesc.getMethodTable().getSet(md.getSymbol());
2832 for (Iterator iterator = methodDescSet.iterator(); iterator.hasNext();) {
2833 MethodDescriptor parentMethodDesc = (MethodDescriptor) iterator.next();
2834 if (parentMethodDesc.matches(md)) {
2835 set.add(parentMethodDesc);
2836 recurUpAccumulateInheritanceDesc(parentMethodDesc, set);
2845 private void recurDownAccumulateInheritanceDesc(Descriptor curDesc, Set<Descriptor> set) {
2847 if (curDesc instanceof ClassDescriptor) {
2848 ClassDescriptor cd = (ClassDescriptor) curDesc;
2849 ClassDescriptor parentClassDesc = cd.getSuperDesc();
2850 Set<ClassDescriptor> directSubClasses = tu.getDirectSubClasses(cd);
2851 for (Iterator iterator = directSubClasses.iterator(); iterator.hasNext();) {
2852 ClassDescriptor child = (ClassDescriptor) iterator.next();
2853 recurDownAccumulateInheritanceDesc(child, set);
2856 MethodDescriptor md = (MethodDescriptor) curDesc;
2857 ClassDescriptor cd = md.getClassDesc();
2860 Set<ClassDescriptor> directSubClasses = tu.getDirectSubClasses(cd);
2861 for (Iterator iterator = directSubClasses.iterator(); iterator.hasNext();) {
2862 ClassDescriptor child = (ClassDescriptor) iterator.next();
2864 Set<MethodDescriptor> methodDescSet = child.getMethodTable().getSet(md.getSymbol());
2865 for (Iterator iterator2 = methodDescSet.iterator(); iterator2.hasNext();) {
2866 MethodDescriptor childMethodDesc = (MethodDescriptor) iterator2.next();
2867 if (childMethodDesc.matches(md)) {
2868 set.add(childMethodDesc);
2869 recurDownAccumulateInheritanceDesc(childMethodDesc, set);
2878 private void accumulateInheritanceDesc(Descriptor curDesc, Set<Descriptor> set) {
2880 recurUpAccumulateInheritanceDesc(curDesc, set);
2881 recurDownAccumulateInheritanceDesc(curDesc, set);
2885 public boolean isValidMergeInheritanceCheck(Descriptor desc, Set<HNode> mergeSet) {
2887 // set up inheritance chain set...
2888 Set<Descriptor> inheritanceDescSet = new HashSet<Descriptor>();
2889 recurUpAccumulateInheritanceDesc(desc, inheritanceDescSet);
2891 nextgraph: for (Iterator iterator = inheritanceDescSet.iterator(); iterator.hasNext();) {
2892 Descriptor inheritDesc = (Descriptor) iterator.next();
2894 if (!desc.equals(inheritDesc)) {
2895 HierarchyGraph graph = getSkeletonCombinationHierarchyGraph(inheritDesc);
2897 // first check whether this graph includes all elements of the merge set
2898 for (Iterator iterator2 = mergeSet.iterator(); iterator2.hasNext();) {
2899 HNode node = (HNode) iterator2.next();
2900 if (!graph.contains(node)) {
2905 HNode firstNode = mergeSet.iterator().next();
2907 Set<HNode> incomingNode = graph.getIncomingNodeSet(firstNode);
2908 Set<HNode> outgoingNode = graph.getOutgoingNodeSet(firstNode);
2910 for (Iterator iterator2 = mergeSet.iterator(); iterator2.hasNext();) {
2911 HNode node = (HNode) iterator2.next();
2913 if (!graph.getIncomingNodeSet(node).equals(incomingNode)
2914 || !graph.getOutgoingNodeSet(node).equals(outgoingNode)) {
2926 private void debug_writeHierarchyDotFiles() {
2928 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
2929 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2930 Descriptor desc = (Descriptor) iterator.next();
2931 getHierarchyGraph(desc).writeGraph();
2936 private void debug_writeSimpleHierarchyDotFiles() {
2938 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
2939 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2940 Descriptor desc = (Descriptor) iterator.next();
2941 getHierarchyGraph(desc).writeGraph();
2942 getSimpleHierarchyGraph(desc).writeGraph();
2943 getSimpleHierarchyGraph(desc).writeGraph(true);
2948 private void debug_writeSkeletonHierarchyDotFiles() {
2950 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
2951 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2952 Descriptor desc = (Descriptor) iterator.next();
2953 getSkeletonHierarchyGraph(desc).writeGraph();
2958 private void debug_writeSkeletonCombinationHierarchyDotFiles() {
2960 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
2961 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
2962 Descriptor desc = (Descriptor) iterator.next();
2963 getSkeletonCombinationHierarchyGraph(desc).writeGraph();
2968 public HierarchyGraph getSimpleHierarchyGraph(Descriptor d) {
2969 return mapDescriptorToSimpleHierarchyGraph.get(d);
2972 private HierarchyGraph getSkeletonHierarchyGraph(Descriptor d) {
2973 if (!mapDescriptorToSkeletonHierarchyGraph.containsKey(d)) {
2974 mapDescriptorToSkeletonHierarchyGraph.put(d, new HierarchyGraph(d));
2976 return mapDescriptorToSkeletonHierarchyGraph.get(d);
2979 public HierarchyGraph getSkeletonCombinationHierarchyGraph(Descriptor d) {
2980 if (!mapDescriptorToCombineSkeletonHierarchyGraph.containsKey(d)) {
2981 mapDescriptorToCombineSkeletonHierarchyGraph.put(d, new HierarchyGraph(d));
2983 return mapDescriptorToCombineSkeletonHierarchyGraph.get(d);
2986 private void constructHierarchyGraph() {
2988 LinkedList<MethodDescriptor> methodDescList =
2989 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
2991 while (!methodDescList.isEmpty()) {
2992 MethodDescriptor md = methodDescList.removeLast();
2993 if (state.SSJAVADEBUG) {
2994 HierarchyGraph hierarchyGraph = new HierarchyGraph(md);
2995 System.out.println();
2996 System.out.println("SSJAVA: Construcing the hierarchy graph from " + md);
2997 constructHierarchyGraph(md, hierarchyGraph);
2998 mapDescriptorToHierarchyGraph.put(md, hierarchyGraph);
3004 while (!toAnalyzeIsEmpty()) {
3005 ClassDescriptor cd = toAnalyzeNext();
3006 HierarchyGraph graph = getHierarchyGraph(cd);
3007 for (Iterator iter = cd.getFields(); iter.hasNext();) {
3008 FieldDescriptor fieldDesc = (FieldDescriptor) iter.next();
3009 if (!(fieldDesc.isStatic() && fieldDesc.isFinal())) {
3010 graph.getHNode(fieldDesc);
3015 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
3016 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
3017 Descriptor key = (Descriptor) iterator.next();
3018 HierarchyGraph graph = getHierarchyGraph(key);
3020 Set<HNode> nodeToBeConnected = new HashSet<HNode>();
3021 for (Iterator iterator2 = graph.getNodeSet().iterator(); iterator2.hasNext();) {
3022 HNode node = (HNode) iterator2.next();
3023 if (!node.isSkeleton() && !node.isCombinationNode()) {
3024 if (graph.getIncomingNodeSet(node).size() == 0) {
3025 nodeToBeConnected.add(node);
3030 for (Iterator iterator2 = nodeToBeConnected.iterator(); iterator2.hasNext();) {
3031 HNode node = (HNode) iterator2.next();
3032 // System.out.println("NEED TO BE CONNECTED TO TOP=" + node);
3033 graph.addEdge(graph.getHNode(TOPDESC), node);
3040 private void constructHierarchyGraph2() {
3042 // do fixed-point analysis
3044 LinkedList<MethodDescriptor> descriptorListToAnalyze = ssjava.getSortedDescriptors();
3046 // Collections.sort(descriptorListToAnalyze, new
3047 // Comparator<MethodDescriptor>() {
3048 // public int compare(MethodDescriptor o1, MethodDescriptor o2) {
3049 // return o1.getSymbol().compareToIgnoreCase(o2.getSymbol());
3053 // current descriptors to visit in fixed-point interprocedural analysis,
3054 // prioritized by dependency in the call graph
3055 methodDescriptorsToVisitStack.clear();
3057 Set<MethodDescriptor> methodDescriptorToVistSet = new HashSet<MethodDescriptor>();
3058 methodDescriptorToVistSet.addAll(descriptorListToAnalyze);
3060 while (!descriptorListToAnalyze.isEmpty()) {
3061 MethodDescriptor md = descriptorListToAnalyze.removeFirst();
3062 methodDescriptorsToVisitStack.add(md);
3065 // analyze scheduled methods until there are no more to visit
3066 while (!methodDescriptorsToVisitStack.isEmpty()) {
3067 // start to analyze leaf node
3068 MethodDescriptor md = methodDescriptorsToVisitStack.pop();
3070 HierarchyGraph hierarchyGraph = new HierarchyGraph(md);
3071 // MethodSummary methodSummary = new MethodSummary(md);
3073 // MethodLocationInfo methodInfo = new MethodLocationInfo(md);
3074 // curMethodInfo = methodInfo;
3076 System.out.println();
3077 System.out.println("SSJAVA: Construcing the hierarchy graph from " + md);
3079 constructHierarchyGraph(md, hierarchyGraph);
3081 HierarchyGraph prevHierarchyGraph = getHierarchyGraph(md);
3082 // MethodSummary prevMethodSummary = getMethodSummary(md);
3084 if (!hierarchyGraph.equals(prevHierarchyGraph)) {
3086 mapDescriptorToHierarchyGraph.put(md, hierarchyGraph);
3087 // mapDescToLocationSummary.put(md, methodSummary);
3089 // results for callee changed, so enqueue dependents caller for
3091 Iterator<MethodDescriptor> depsItr = ssjava.getDependents(md).iterator();
3092 while (depsItr.hasNext()) {
3093 MethodDescriptor methodNext = depsItr.next();
3094 if (!methodDescriptorsToVisitStack.contains(methodNext)
3095 && methodDescriptorToVistSet.contains(methodNext)) {
3096 methodDescriptorsToVisitStack.add(methodNext);
3105 while (!toAnalyzeIsEmpty()) {
3106 ClassDescriptor cd = toAnalyzeNext();
3107 HierarchyGraph graph = getHierarchyGraph(cd);
3108 for (Iterator iter = cd.getFields(); iter.hasNext();) {
3109 FieldDescriptor fieldDesc = (FieldDescriptor) iter.next();
3110 if (!(fieldDesc.isStatic() && fieldDesc.isFinal())) {
3111 graph.getHNode(fieldDesc);
3116 Set<Descriptor> keySet = mapDescriptorToHierarchyGraph.keySet();
3117 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
3118 Descriptor key = (Descriptor) iterator.next();
3119 HierarchyGraph graph = getHierarchyGraph(key);
3121 Set<HNode> nodeToBeConnected = new HashSet<HNode>();
3122 for (Iterator iterator2 = graph.getNodeSet().iterator(); iterator2.hasNext();) {
3123 HNode node = (HNode) iterator2.next();
3124 if (!node.isSkeleton() && !node.isCombinationNode()) {
3125 if (graph.getIncomingNodeSet(node).size() == 0) {
3126 nodeToBeConnected.add(node);
3131 for (Iterator iterator2 = nodeToBeConnected.iterator(); iterator2.hasNext();) {
3132 HNode node = (HNode) iterator2.next();
3133 // System.out.println("NEED TO BE CONNECTED TO TOP=" + node);
3134 graph.addEdge(graph.getHNode(TOPDESC), node);
3141 private HierarchyGraph getHierarchyGraph(Descriptor d) {
3142 if (!mapDescriptorToHierarchyGraph.containsKey(d)) {
3143 mapDescriptorToHierarchyGraph.put(d, new HierarchyGraph(d));
3145 return mapDescriptorToHierarchyGraph.get(d);
3148 private void constructHierarchyGraph(MethodDescriptor md, HierarchyGraph methodGraph) {
3150 // visit each node of method flow graph
3151 FlowGraph fg = getFlowGraph(md);
3152 // Set<FlowNode> nodeSet = fg.getNodeSet();
3154 Set<FlowEdge> edgeSet = fg.getEdgeSet();
3156 Set<Descriptor> paramDescSet = fg.getMapParamDescToIdx().keySet();
3157 for (Iterator iterator = paramDescSet.iterator(); iterator.hasNext();) {
3158 Descriptor desc = (Descriptor) iterator.next();
3159 methodGraph.getHNode(desc).setSkeleton(true);
3162 // for the method lattice, we need to look at the first element of
3163 // NTuple<Descriptor>
3164 boolean hasGlobalAccess = false;
3165 // for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
3166 // FlowNode originalSrcNode = (FlowNode) iterator.next();
3167 for (Iterator iterator = edgeSet.iterator(); iterator.hasNext();) {
3168 FlowEdge edge = (FlowEdge) iterator.next();
3170 FlowNode originalSrcNode = fg.getFlowNode(edge.getInitTuple());
3171 Set<FlowNode> sourceNodeSet = new HashSet<FlowNode>();
3172 if (originalSrcNode instanceof FlowReturnNode) {
3173 FlowReturnNode rnode = (FlowReturnNode) originalSrcNode;
3174 // System.out.println("rnode=" + rnode);
3175 Set<NTuple<Descriptor>> tupleSet = rnode.getReturnTupleSet();
3176 for (Iterator iterator2 = tupleSet.iterator(); iterator2.hasNext();) {
3177 NTuple<Descriptor> nTuple = (NTuple<Descriptor>) iterator2.next();
3178 sourceNodeSet.add(fg.getFlowNode(nTuple));
3179 // System.out.println("&&&SOURCE fg.getFlowNode(nTuple)=" + fg.getFlowNode(nTuple));
3182 sourceNodeSet.add(originalSrcNode);
3185 // System.out.println("---sourceNodeSet=" + sourceNodeSet + " from originalSrcNode="
3186 // + originalSrcNode);
3188 for (Iterator iterator3 = sourceNodeSet.iterator(); iterator3.hasNext();) {
3189 FlowNode srcNode = (FlowNode) iterator3.next();
3191 NTuple<Descriptor> srcNodeTuple = srcNode.getDescTuple();
3192 Descriptor srcLocalDesc = srcNodeTuple.get(0);
3194 if (srcLocalDesc instanceof InterDescriptor
3195 && ((InterDescriptor) srcLocalDesc).getMethodArgIdxPair() != null) {
3197 if (srcNode.getCompositeLocation() == null) {
3202 // if the srcNode is started with the global descriptor
3203 // need to set as a skeleton node
3204 if (!hasGlobalAccess && srcNode.getDescTuple().startsWith(GLOBALDESC)) {
3205 hasGlobalAccess = true;
3208 // Set<FlowEdge> outEdgeSet = fg.getOutEdgeSet(originalSrcNode);
3209 // for (Iterator iterator2 = outEdgeSet.iterator(); iterator2.hasNext();) {
3210 // FlowEdge outEdge = (FlowEdge) iterator2.next();
3211 // FlowNode originalDstNode = outEdge.getDst();
3212 FlowNode originalDstNode = fg.getFlowNode(edge.getEndTuple());
3214 Set<FlowNode> dstNodeSet = new HashSet<FlowNode>();
3215 if (originalDstNode instanceof FlowReturnNode) {
3216 FlowReturnNode rnode = (FlowReturnNode) originalDstNode;
3217 // System.out.println("\n-returnNode=" + rnode);
3218 Set<NTuple<Descriptor>> tupleSet = rnode.getReturnTupleSet();
3219 for (Iterator iterator4 = tupleSet.iterator(); iterator4.hasNext();) {
3220 NTuple<Descriptor> nTuple = (NTuple<Descriptor>) iterator4.next();
3221 dstNodeSet.add(fg.getFlowNode(nTuple));
3222 // System.out.println("&&&DST fg.getFlowNode(nTuple)=" + fg.getFlowNode(nTuple));
3225 dstNodeSet.add(originalDstNode);
3227 // System.out.println("---dstNodeSet=" + dstNodeSet);
3228 for (Iterator iterator4 = dstNodeSet.iterator(); iterator4.hasNext();) {
3229 FlowNode dstNode = (FlowNode) iterator4.next();
3231 NTuple<Descriptor> dstNodeTuple = dstNode.getDescTuple();
3232 Descriptor dstLocalDesc = dstNodeTuple.get(0);
3234 if (dstLocalDesc instanceof InterDescriptor
3235 && ((InterDescriptor) dstLocalDesc).getMethodArgIdxPair() != null) {
3236 if (dstNode.getCompositeLocation() == null) {
3237 // System.out.println("%%%%%%%%%%%%%SKIP=" + dstNode);
3242 // if (outEdge.getInitTuple().equals(srcNodeTuple)
3243 // && outEdge.getEndTuple().equals(dstNodeTuple)) {
3245 NTuple<Descriptor> srcCurTuple = srcNode.getCurrentDescTuple();
3246 NTuple<Descriptor> dstCurTuple = dstNode.getCurrentDescTuple();
3248 // //////////////////////////
3249 // inheritance check
3250 if (mapMethodDescToHighestOverriddenMethodDesc.containsKey(md)) {
3252 MethodDescriptor highestOverriddenMethodDesc =
3253 mapMethodDescToHighestOverriddenMethodDesc.get(md);
3255 if (srcCurTuple.get(srcCurTuple.size() - 1).getSymbol().startsWith(PCLOC)) {
3259 // //////////////////////////
3261 // System.out.println("-srcCurTuple=" + srcCurTuple + " dstCurTuple=" + dstCurTuple
3262 // + " srcNode=" + srcNode + " dstNode=" + dstNode);
3264 // srcCurTuple = translateBaseTuple(srcNode, srcCurTuple);
3265 // dstCurTuple = translateBaseTuple(dstNode, dstCurTuple);
3267 if ((srcCurTuple.size() > 1 && dstCurTuple.size() > 1)
3268 && srcCurTuple.get(0).equals(dstCurTuple.get(0))) {
3270 // value flows between fields
3271 Descriptor desc = srcCurTuple.get(0);
3272 ClassDescriptor classDesc;
3274 if (desc.equals(GLOBALDESC)) {
3275 classDesc = md.getClassDesc();
3277 VarDescriptor varDesc = (VarDescriptor) srcCurTuple.get(0);
3278 classDesc = varDesc.getType().getClassDesc();
3280 extractFlowsBetweenFields(classDesc, srcNode, dstNode, 1);
3282 } else if ((srcCurTuple.size() == 1 && dstCurTuple.size() == 1)
3283 || ((srcCurTuple.size() > 1 || dstCurTuple.size() > 1) && !srcCurTuple.get(0).equals(
3284 dstCurTuple.get(0)))) {
3286 // value flow between a primitive local var - a primitive local var or local var -
3289 Descriptor srcDesc = srcCurTuple.get(0);
3290 Descriptor dstDesc = dstCurTuple.get(0);
3292 methodGraph.addEdge(srcDesc, dstDesc);
3294 if (fg.isParamDesc(srcDesc)) {
3295 methodGraph.setParamHNode(srcDesc);
3297 if (fg.isParamDesc(dstDesc)) {
3298 methodGraph.setParamHNode(dstDesc);
3312 // If the method accesses static fields
3313 // set hasGloabalAccess true in the method summary.
3314 if (hasGlobalAccess) {
3315 getMethodSummary(md).setHasGlobalAccess();
3317 methodGraph.getHNode(GLOBALDESC).setSkeleton(true);
3319 if (ssjava.getMethodContainingSSJavaLoop().equals(md)) {
3320 // if the current method contains the event loop
3321 // we need to set all nodes of the hierarchy graph as a skeleton node
3322 Set<HNode> hnodeSet = methodGraph.getNodeSet();
3323 for (Iterator iterator = hnodeSet.iterator(); iterator.hasNext();) {
3324 HNode hnode = (HNode) iterator.next();
3325 hnode.setSkeleton(true);
3331 private NTuple<Descriptor> translateBaseTuple(FlowNode flowNode, NTuple<Descriptor> inTuple) {
3333 if (flowNode.getBaseTuple() != null) {
3335 NTuple<Descriptor> translatedTuple = new NTuple<Descriptor>();
3337 NTuple<Descriptor> baseTuple = flowNode.getBaseTuple();
3339 for (int i = 0; i < baseTuple.size(); i++) {
3340 translatedTuple.add(baseTuple.get(i));
3343 for (int i = 1; i < inTuple.size(); i++) {
3344 translatedTuple.add(inTuple.get(i));
3347 // System.out.println("------TRANSLATED " + inTuple + " -> " + translatedTuple);
3348 return translatedTuple;
3356 private MethodSummary getMethodSummary(MethodDescriptor md) {
3357 if (!mapDescToLocationSummary.containsKey(md)) {
3358 mapDescToLocationSummary.put(md, new MethodSummary(md));
3360 return (MethodSummary) mapDescToLocationSummary.get(md);
3363 private void addMapClassDefinitionToLineNum(ClassDescriptor cd, String strLine, int lineNum) {
3365 String classSymbol = cd.getSymbol();
3366 int idx = classSymbol.lastIndexOf("$");
3368 classSymbol = classSymbol.substring(idx + 1);
3371 String pattern = "class " + classSymbol + " ";
3372 if (strLine.indexOf(pattern) != -1) {
3373 mapDescToDefinitionLine.put(cd, lineNum);
3377 private void addMapMethodDefinitionToLineNum(Set<MethodDescriptor> methodSet, String strLine,
3379 for (Iterator iterator = methodSet.iterator(); iterator.hasNext();) {
3380 MethodDescriptor md = (MethodDescriptor) iterator.next();
3381 String pattern = md.getMethodDeclaration();
3382 if (strLine.indexOf(pattern) != -1) {
3383 mapDescToDefinitionLine.put(md, lineNum);
3384 methodSet.remove(md);
3391 private void readOriginalSourceFiles() {
3393 SymbolTable classtable = state.getClassSymbolTable();
3395 Set<ClassDescriptor> classDescSet = new HashSet<ClassDescriptor>();
3396 classDescSet.addAll(classtable.getValueSet());
3399 // inefficient implement. it may re-visit the same file if the file
3400 // contains more than one class definitions.
3401 for (Iterator iterator = classDescSet.iterator(); iterator.hasNext();) {
3402 ClassDescriptor cd = (ClassDescriptor) iterator.next();
3404 Set<MethodDescriptor> methodSet = new HashSet<MethodDescriptor>();
3405 methodSet.addAll(cd.getMethodTable().getValueSet());
3407 String sourceFileName = cd.getSourceFileName();
3408 Vector<String> lineVec = new Vector<String>();
3410 mapFileNameToLineVector.put(sourceFileName, lineVec);
3412 BufferedReader in = new BufferedReader(new FileReader(sourceFileName));
3415 lineVec.add(""); // the index is started from 1.
3416 while ((strLine = in.readLine()) != null) {
3417 lineVec.add(lineNum, strLine);
3418 addMapClassDefinitionToLineNum(cd, strLine, lineNum);
3419 addMapMethodDefinitionToLineNum(methodSet, strLine, lineNum);
3425 } catch (IOException e) {
3426 e.printStackTrace();
3431 private String generateLatticeDefinition(Descriptor desc) {
3433 Set<String> sharedLocSet = new HashSet<String>();
3435 SSJavaLattice<String> lattice = getLattice(desc);
3436 String rtr = "@LATTICE(\"";
3438 Map<String, Set<String>> map = lattice.getTable();
3439 Set<String> keySet = map.keySet();
3441 // System.out.println("@generateLatticeDefinition=" + desc + " map=" + map);
3443 boolean first = true;
3444 for (Iterator iterator = keySet.iterator(); iterator.hasNext();) {
3445 String key = (String) iterator.next();
3446 if (!key.equals(lattice.getTopItem())) {
3447 Set<String> connectedSet = map.get(key);
3449 if (connectedSet.size() == 1) {
3450 if (connectedSet.iterator().next().equals(lattice.getBottomItem())) {
3458 if (lattice.isSharedLoc(key)) {
3459 rtr += "," + key + "*";
3464 for (Iterator iterator2 = connectedSet.iterator(); iterator2.hasNext();) {
3465 String loc = (String) iterator2.next();
3466 if (!loc.equals(lattice.getBottomItem())) {
3473 rtr += loc + "<" + key;
3474 if (lattice.isSharedLoc(key) && (!sharedLocSet.contains(key))) {
3475 rtr += "," + key + "*";
3476 sharedLocSet.add(key);
3478 if (lattice.isSharedLoc(loc) && (!sharedLocSet.contains(loc))) {
3479 rtr += "," + loc + "*";
3480 sharedLocSet.add(loc);
3488 if (desc instanceof MethodDescriptor) {
3489 // System.out.println("#EXTRA LOC DECLARATION GEN=" + desc);
3491 MethodDescriptor md = (MethodDescriptor) desc;
3492 MethodSummary methodSummary = getMethodSummary(md);
3494 TypeDescriptor returnType = ((MethodDescriptor) desc).getReturnType();
3495 if (!ssjava.getMethodContainingSSJavaLoop().equals(desc) && returnType != null
3496 && (!returnType.isVoid())) {
3497 CompositeLocation returnLoc = methodSummary.getRETURNLoc();
3498 if (returnLoc.getSize() == 1) {
3499 String returnLocStr = generateLocationAnnoatation(methodSummary.getRETURNLoc());
3500 if (rtr.indexOf(returnLocStr) == -1) {
3501 rtr += "," + returnLocStr;
3507 if (!ssjava.getMethodContainingSSJavaLoop().equals(desc)) {
3508 if (returnType != null && (!returnType.isVoid())) {
3510 "\n@RETURNLOC(\"" + generateLocationAnnoatation(methodSummary.getRETURNLoc()) + "\")";
3513 CompositeLocation pcLoc = methodSummary.getPCLoc();
3514 if ((pcLoc != null) && (!pcLoc.get(0).isTop())) {
3515 rtr += "\n@PCLOC(\"" + generateLocationAnnoatation(pcLoc) + "\")";
3519 if (!md.isStatic()) {
3520 rtr += "\n@THISLOC(\"" + methodSummary.getThisLocName() + "\")";
3522 rtr += "\n@GLOBALLOC(\"" + methodSummary.getGlobalLocName() + "\")";
3531 private void generateAnnoatedCode() {
3533 readOriginalSourceFiles();
3536 while (!toAnalyzeIsEmpty()) {
3537 ClassDescriptor cd = toAnalyzeNext();
3539 setupToAnalazeMethod(cd);
3541 String sourceFileName = cd.getSourceFileName();
3543 if (cd.isInterface()) {
3547 int classDefLine = mapDescToDefinitionLine.get(cd);
3548 Vector<String> sourceVec = mapFileNameToLineVector.get(sourceFileName);
3550 LocationSummary fieldLocSummary = getLocationSummary(cd);
3552 String fieldLatticeDefStr = generateLatticeDefinition(cd);
3553 String annoatedSrc = fieldLatticeDefStr + newline + sourceVec.get(classDefLine);
3554 sourceVec.set(classDefLine, annoatedSrc);
3556 // generate annotations for field declarations
3557 // Map<Descriptor, CompositeLocation> inferLocMap = fieldLocInfo.getMapDescToInferLocation();
3558 Map<String, String> mapFieldNameToLocName = fieldLocSummary.getMapHNodeNameToLocationName();
3560 for (Iterator iter = cd.getFields(); iter.hasNext();) {
3561 FieldDescriptor fd = (FieldDescriptor) iter.next();
3563 String locAnnotationStr;
3564 // CompositeLocation inferLoc = inferLocMap.get(fd);
3565 String locName = mapFieldNameToLocName.get(fd.getSymbol());
3567 if (locName != null) {
3568 // infer loc is null if the corresponding field is static and final
3569 // locAnnotationStr = "@LOC(\"" + generateLocationAnnoatation(inferLoc) + "\")";
3570 locAnnotationStr = "@LOC(\"" + locName + "\")";
3571 int fdLineNum = fd.getLineNum();
3572 String orgFieldDeclarationStr = sourceVec.get(fdLineNum);
3573 String fieldDeclaration = fd.toString();
3574 fieldDeclaration = fieldDeclaration.substring(0, fieldDeclaration.length() - 1);
3575 String annoatedStr = locAnnotationStr + " " + orgFieldDeclarationStr;
3576 sourceVec.set(fdLineNum, annoatedStr);
3581 while (!toAnalyzeMethodIsEmpty()) {
3582 MethodDescriptor md = toAnalyzeMethodNext();
3584 if (!ssjava.needTobeAnnotated(md)) {
3588 SSJavaLattice<String> methodLattice = md2lattice.get(md);
3589 // System.out.println("md=" + md + " methodLattice=" + methodLattice);
3590 if (methodLattice != null) {
3592 int methodDefLine = md.getLineNum();
3594 // MethodLocationInfo methodLocInfo = getMethodLocationInfo(md);
3595 // Map<Descriptor, CompositeLocation> methodInferLocMap =
3596 // methodLocInfo.getMapDescToInferLocation();
3598 MethodSummary methodSummary = getMethodSummary(md);
3600 Map<Descriptor, CompositeLocation> mapVarDescToInferLoc =
3601 methodSummary.getMapVarDescToInferCompositeLocation();
3602 // System.out.println("-----md=" + md + " methodDefLine=" + methodDefLine);
3603 // System.out.println("-----mapVarDescToInferLoc=" + mapVarDescToInferLoc);
3605 Set<Descriptor> localVarDescSet = mapVarDescToInferLoc.keySet();
3607 Set<String> localLocElementSet = methodLattice.getElementSet();
3609 for (Iterator iterator = localVarDescSet.iterator(); iterator.hasNext();) {
3610 Descriptor localVarDesc = (Descriptor) iterator.next();
3611 // System.out.println("-------localVarDesc=" + localVarDesc);
3612 CompositeLocation inferLoc = mapVarDescToInferLoc.get(localVarDesc);
3614 String localLocIdentifier = inferLoc.get(0).getLocIdentifier();
3615 if (!localLocElementSet.contains(localLocIdentifier)) {
3616 methodLattice.put(localLocIdentifier);
3619 String locAnnotationStr = "@LOC(\"" + generateLocationAnnoatation(inferLoc) + "\")";
3621 if (!isParameter(md, localVarDesc)) {
3622 if (mapDescToDefinitionLine.containsKey(localVarDesc)) {
3623 int varLineNum = mapDescToDefinitionLine.get(localVarDesc);
3624 String orgSourceLine = sourceVec.get(varLineNum);
3625 // System.out.println("varLineNum=" + varLineNum + " org src=" + orgSourceLine);
3627 orgSourceLine.indexOf(generateVarDeclaration((VarDescriptor) localVarDesc));
3628 // System.out.println("idx=" + idx
3629 // + " generateVarDeclaration((VarDescriptor) localVarDesc)="
3630 // + generateVarDeclaration((VarDescriptor) localVarDesc));
3632 String annoatedStr =
3633 orgSourceLine.substring(0, idx) + locAnnotationStr + " "
3634 + orgSourceLine.substring(idx);
3635 sourceVec.set(varLineNum, annoatedStr);
3638 String methodDefStr = sourceVec.get(methodDefLine);
3641 getParamLocation(methodDefStr,
3642 generateVarDeclaration((VarDescriptor) localVarDesc));
3643 // System.out.println("methodDefStr=" + methodDefStr + " localVarDesc=" + localVarDesc
3644 // + " idx=" + idx);
3647 String annoatedStr =
3648 methodDefStr.substring(0, idx) + locAnnotationStr + " "
3649 + methodDefStr.substring(idx);
3650 sourceVec.set(methodDefLine, annoatedStr);
3655 // check if the lattice has to have the location type for the this
3658 // boolean needToAddthisRef = hasThisReference(md);
3659 // if (localLocElementSet.contains("this")) {
3660 // methodLattice.put("this");
3663 String methodLatticeDefStr = generateLatticeDefinition(md);
3664 String annoatedStr = methodLatticeDefStr + newline + sourceVec.get(methodDefLine);
3665 sourceVec.set(methodDefLine, annoatedStr);
3675 private boolean hasThisReference(MethodDescriptor md) {
3677 FlowGraph fg = getFlowGraph(md);
3678 Set<FlowNode> nodeSet = fg.getNodeSet();
3679 for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
3680 FlowNode flowNode = (FlowNode) iterator.next();
3681 if (flowNode.getDescTuple().get(0).equals(md.getThis())) {
3689 private int getParamLocation(String methodStr, String paramStr) {
3691 String pattern = paramStr + ",";
3693 int idx = methodStr.indexOf(pattern);
3697 pattern = paramStr + ")";
3698 return methodStr.indexOf(pattern);
3703 private String generateVarDeclaration(VarDescriptor varDesc) {
3705 TypeDescriptor td = varDesc.getType();
3706 String rtr = td.toString();
3708 for (int i = 0; i < td.getArrayCount(); i++) {
3712 rtr += " " + varDesc.getName();
3717 private String generateLocationAnnoatation(CompositeLocation loc) {
3720 Location methodLoc = loc.get(0);
3721 rtr += methodLoc.getLocIdentifier();
3723 for (int i = 1; i < loc.getSize(); i++) {
3724 Location element = loc.get(i);
3725 rtr += "," + element.getDescriptor().getSymbol() + "." + element.getLocIdentifier();
3731 private boolean isParameter(MethodDescriptor md, Descriptor localVarDesc) {
3732 return getFlowGraph(md).isParamDesc(localVarDesc);
3735 private String extractFileName(String fileName) {
3736 int idx = fileName.lastIndexOf("/");
3740 return fileName.substring(idx + 1);
3745 private void codeGen() {
3747 Set<String> originalFileNameSet = mapFileNameToLineVector.keySet();
3748 for (Iterator iterator = originalFileNameSet.iterator(); iterator.hasNext();) {
3749 String orgFileName = (String) iterator.next();
3750 String outputFileName = extractFileName(orgFileName);
3752 Vector<String> sourceVec = mapFileNameToLineVector.get(orgFileName);
3756 FileWriter fileWriter = new FileWriter("./infer/" + outputFileName);
3757 BufferedWriter out = new BufferedWriter(fileWriter);
3759 for (int i = 0; i < sourceVec.size(); i++) {
3760 out.write(sourceVec.get(i));
3764 } catch (IOException e) {
3765 e.printStackTrace();
3772 private void checkLattices() {
3774 LinkedList<MethodDescriptor> descriptorListToAnalyze = ssjava.getSortedDescriptors();
3776 // current descriptors to visit in fixed-point interprocedural analysis,
3778 // dependency in the call graph
3779 methodDescriptorsToVisitStack.clear();
3781 // descriptorListToAnalyze.removeFirst();
3783 Set<MethodDescriptor> methodDescriptorToVistSet = new HashSet<MethodDescriptor>();
3784 methodDescriptorToVistSet.addAll(descriptorListToAnalyze);
3786 while (!descriptorListToAnalyze.isEmpty()) {
3787 MethodDescriptor md = descriptorListToAnalyze.removeFirst();
3788 checkLatticesOfVirtualMethods(md);
3793 private void debug_writeLatticeDotFile() {
3794 // generate lattice dot file
3798 while (!toAnalyzeIsEmpty()) {
3799 ClassDescriptor cd = toAnalyzeNext();
3801 setupToAnalazeMethod(cd);
3803 SSJavaLattice<String> classLattice = cd2lattice.get(cd);
3804 if (classLattice != null) {
3805 ssjava.writeLatticeDotFile(cd, null, classLattice);
3806 // debug_printDescriptorToLocNameMapping(cd);
3809 while (!toAnalyzeMethodIsEmpty()) {
3810 MethodDescriptor md = toAnalyzeMethodNext();
3811 SSJavaLattice<String> methodLattice = md2lattice.get(md);
3812 if (methodLattice != null) {
3813 ssjava.writeLatticeDotFile(cd, md, methodLattice);
3814 // debug_printDescriptorToLocNameMapping(md);
3821 private void debug_printDescriptorToLocNameMapping(Descriptor desc) {
3823 LocationInfo info = getLocationInfo(desc);
3824 System.out.println("## " + desc + " ##");
3825 System.out.println(info.getMapDescToInferLocation());
3826 LocationInfo locInfo = getLocationInfo(desc);
3827 System.out.println("mapping=" + locInfo.getMapLocSymbolToDescSet());
3828 System.out.println("###################");
3832 private void calculateExtraLocations() {
3834 // LinkedList<MethodDescriptor> methodDescList = ssjava.getSortedDescriptors();
3835 LinkedList<MethodDescriptor> methodDescList =
3836 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
3837 for (Iterator iterator = methodDescList.iterator(); iterator.hasNext();) {
3838 MethodDescriptor md = (MethodDescriptor) iterator.next();
3839 if (!ssjava.getMethodContainingSSJavaLoop().equals(md)) {
3840 calculateExtraLocations(md);
3846 private void checkLatticesOfVirtualMethods(MethodDescriptor md) {
3848 if (!md.isStatic()) {
3849 Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
3850 setPossibleCallees.addAll(ssjava.getCallGraph().getMethods(md));
3852 for (Iterator iterator = setPossibleCallees.iterator(); iterator.hasNext();) {
3853 MethodDescriptor mdCallee = (MethodDescriptor) iterator.next();
3854 if (!md.equals(mdCallee)) {
3855 checkConsistency(md, mdCallee);
3863 private void checkConsistency(MethodDescriptor md1, MethodDescriptor md2) {
3865 // check that two lattice have the same relations between parameters(+PC
3866 // LOC, GLOBAL_LOC RETURN LOC)
3868 List<CompositeLocation> list1 = new ArrayList<CompositeLocation>();
3869 List<CompositeLocation> list2 = new ArrayList<CompositeLocation>();
3871 MethodLocationInfo locInfo1 = getMethodLocationInfo(md1);
3872 MethodLocationInfo locInfo2 = getMethodLocationInfo(md2);
3874 Map<Integer, CompositeLocation> paramMap1 = locInfo1.getMapParamIdxToInferLoc();
3875 Map<Integer, CompositeLocation> paramMap2 = locInfo2.getMapParamIdxToInferLoc();
3877 int numParam = locInfo1.getMapParamIdxToInferLoc().keySet().size();
3879 // add location types of paramters
3880 for (int idx = 0; idx < numParam; idx++) {
3881 list1.add(paramMap1.get(Integer.valueOf(idx)));
3882 list2.add(paramMap2.get(Integer.valueOf(idx)));
3885 // add program counter location
3886 list1.add(locInfo1.getPCLoc());
3887 list2.add(locInfo2.getPCLoc());
3889 if (!md1.getReturnType().isVoid()) {
3890 // add return value location
3891 CompositeLocation rtrLoc1 = getMethodLocationInfo(md1).getReturnLoc();
3892 CompositeLocation rtrLoc2 = getMethodLocationInfo(md2).getReturnLoc();
3897 // add global location type
3898 if (md1.isStatic()) {
3899 CompositeLocation globalLoc1 =
3900 new CompositeLocation(new Location(md1, locInfo1.getGlobalLocName()));
3901 CompositeLocation globalLoc2 =
3902 new CompositeLocation(new Location(md2, locInfo2.getGlobalLocName()));
3903 list1.add(globalLoc1);
3904 list2.add(globalLoc2);
3907 for (int i = 0; i < list1.size(); i++) {
3908 CompositeLocation locA1 = list1.get(i);
3909 CompositeLocation locA2 = list2.get(i);
3910 for (int k = 0; k < list1.size(); k++) {
3912 CompositeLocation locB1 = list1.get(k);
3913 CompositeLocation locB2 = list2.get(k);
3914 boolean r1 = isGreaterThan(getLattice(md1), locA1, locB1);
3916 boolean r2 = isGreaterThan(getLattice(md1), locA2, locB2);
3919 throw new Error("The method " + md1 + " is not consistent with the method " + md2
3920 + ".:: They have a different ordering relation between locations (" + locA1 + ","
3921 + locB1 + ") and (" + locA2 + "," + locB2 + ").");
3929 private String getSymbol(int idx, FlowNode node) {
3930 Descriptor desc = node.getDescTuple().get(idx);
3931 return desc.getSymbol();
3934 private Descriptor getDescriptor(int idx, FlowNode node) {
3935 Descriptor desc = node.getDescTuple().get(idx);
3939 private void calculatePCLOC(MethodDescriptor md) {
3941 // System.out.println("#CalculatePCLOC");
3942 MethodSummary methodSummary = getMethodSummary(md);
3943 FlowGraph fg = getFlowGraph(md);
3944 Map<Integer, CompositeLocation> mapParamToLoc = methodSummary.getMapParamIdxToInferLoc();
3946 // calculate the initial program counter location
3947 // PC location is higher than location types of parameters which has incoming flows.
3949 Set<NTuple<Location>> paramLocTupleHavingInFlowSet = new HashSet<NTuple<Location>>();
3950 Set<Descriptor> paramDescNOTHavingInFlowSet = new HashSet<Descriptor>();
3951 // Set<FlowNode> paramNodeNOThavingInFlowSet = new HashSet<FlowNode>();
3953 int numParams = fg.getNumParameters();
3954 for (int i = 0; i < numParams; i++) {
3955 FlowNode paramFlowNode = fg.getParamFlowNode(i);
3956 Descriptor prefix = paramFlowNode.getDescTuple().get(0);
3957 NTuple<Descriptor> paramDescTuple = paramFlowNode.getCurrentDescTuple();
3958 NTuple<Location> paramLocTuple = translateToLocTuple(md, paramDescTuple);
3960 Set<FlowNode> inNodeToParamSet = fg.getIncomingNodeSetByPrefix(prefix);
3961 if (inNodeToParamSet.size() > 0) {
3962 // parameter has in-value flows
3964 for (Iterator iterator = inNodeToParamSet.iterator(); iterator.hasNext();) {
3965 FlowNode inNode = (FlowNode) iterator.next();
3966 Set<FlowEdge> outEdgeSet = fg.getOutEdgeSet(inNode);
3967 for (Iterator iterator2 = outEdgeSet.iterator(); iterator2.hasNext();) {
3968 FlowEdge flowEdge = (FlowEdge) iterator2.next();
3969 if (flowEdge.getEndTuple().startsWith(prefix)) {
3970 NTuple<Location> paramLocTupleWithIncomingFlow =
3971 translateToLocTuple(md, flowEdge.getEndTuple());
3972 paramLocTupleHavingInFlowSet.add(paramLocTupleWithIncomingFlow);
3977 // paramLocTupleHavingInFlowSet.add(paramLocTuple);
3979 // paramNodeNOThavingInFlowSet.add(fg.getFlowNode(paramDescTuple));
3980 paramDescNOTHavingInFlowSet.add(prefix);
3984 // System.out.println("paramLocTupleHavingInFlowSet=" + paramLocTupleHavingInFlowSet);
3986 if (paramLocTupleHavingInFlowSet.size() > 0
3987 && !coversAllParamters(md, fg, paramLocTupleHavingInFlowSet)) {
3989 // Here, generates a location in the method lattice that is higher than the
3990 // paramLocTupleHavingInFlowSet
3991 NTuple<Location> pcLocTuple =
3992 generateLocTupleRelativeTo(md, paramLocTupleHavingInFlowSet, PCLOC);
3994 NTuple<Descriptor> pcDescTuple = translateToDescTuple(pcLocTuple);
3996 // System.out.println("pcLoc=" + pcLocTuple);
3998 CompositeLocation curPCLoc = methodSummary.getPCLoc();
3999 if (curPCLoc.get(0).isTop() || pcLocTuple.size() > curPCLoc.getSize()) {
4000 methodSummary.setPCLoc(new CompositeLocation(pcLocTuple));
4002 Set<FlowNode> flowNodeLowerthanPCLocSet = new HashSet<FlowNode>();
4003 GlobalFlowGraph subGlobalFlowGraph = getSubGlobalFlowGraph(md);
4004 // add ordering relations s.t. PCLOC is higher than all flow nodes except the set of
4005 // parameters that do not have incoming flows
4006 for (Iterator iterator = fg.getNodeSet().iterator(); iterator.hasNext();) {
4007 FlowNode node = (FlowNode) iterator.next();
4009 if (!(node instanceof FlowReturnNode)) {
4010 if (!paramDescNOTHavingInFlowSet.contains(node.getCurrentDescTuple().get(0))) {
4011 flowNodeLowerthanPCLocSet.add(node);
4012 fg.addValueFlowEdge(pcDescTuple, node.getDescTuple());
4014 subGlobalFlowGraph.addValueFlowEdge(pcLocTuple,
4015 translateToLocTuple(md, node.getDescTuple()));
4018 // System.out.println("***SKIP PCLOC -> RETURNLOC=" + node);
4022 fg.getFlowNode(translateToDescTuple(pcLocTuple)).setSkeleton(true);
4024 if (pcLocTuple.get(0).getLocDescriptor().equals(md.getThis())) {
4025 for (Iterator iterator = flowNodeLowerthanPCLocSet.iterator(); iterator.hasNext();) {
4026 FlowNode lowerNode = (FlowNode) iterator.next();
4027 if (lowerNode.getDescTuple().size() == 1 && lowerNode.getCompositeLocation() == null) {
4028 NTuple<Location> lowerLocTuple = translateToLocTuple(md, lowerNode.getDescTuple());
4029 CompositeLocation newComp =
4030 calculateCompositeLocationFromSubGlobalGraph(md, lowerNode);
4031 if (newComp != null) {
4032 subGlobalFlowGraph.addMapLocationToInferCompositeLocation(lowerLocTuple.get(0),
4034 lowerNode.setCompositeLocation(newComp);
4035 // System.out.println("NEW COMP LOC=" + newComp + " to lowerNode=" + lowerNode);
4048 private int countFirstDescriptorSetSize(Set<NTuple<Location>> set) {
4050 Set<Descriptor> descSet = new HashSet<Descriptor>();
4052 for (Iterator iterator = set.iterator(); iterator.hasNext();) {
4053 NTuple<Location> locTuple = (NTuple<Location>) iterator.next();
4054 descSet.add(locTuple.get(0).getLocDescriptor());
4057 return descSet.size();
4060 private boolean coversAllParamters(MethodDescriptor md, FlowGraph fg,
4061 Set<NTuple<Location>> paramLocTupleHavingInFlowSet) {
4063 int numParam = fg.getNumParameters();
4064 // int size = paramLocTupleHavingInFlowSet.size();
4065 int size = countFirstDescriptorSetSize(paramLocTupleHavingInFlowSet);
4067 // System.out.println("numParam=" + numParam + " size=" + size);
4069 // if (!md.isStatic()) {
4071 // // if the method is not static && there is a parameter composite location &&
4072 // // it is started with 'this',
4073 // // paramLocTupleHavingInFlowSet need to have 'this' parameter.
4075 // FlowNode thisParamNode = fg.getParamFlowNode(0);
4076 // NTuple<Location> thisParamLocTuple =
4077 // translateToLocTuple(md, thisParamNode.getCurrentDescTuple());
4079 // if (!paramLocTupleHavingInFlowSet.contains(thisParamLocTuple)) {
4081 // for (Iterator iterator = paramLocTupleHavingInFlowSet.iterator(); iterator.hasNext();) {
4082 // NTuple<Location> paramTuple = (NTuple<Location>) iterator.next();
4083 // if (paramTuple.size() > 1 && paramTuple.get(0).getLocDescriptor().equals(md.getThis())) {
4084 // // paramLocTupleHavingInFlowSet.add(thisParamLocTuple);
4093 if (size == numParam) {
4101 private void calculateRETURNLOC(MethodDescriptor md) {
4103 // System.out.println("#calculateRETURNLOC= " + md);
4105 // calculate a return location:
4106 // the return location type is lower than all parameters and the location of return values
4107 MethodSummary methodSummary = getMethodSummary(md);
4108 // if (methodSummary.getRETURNLoc() != null) {
4109 // System.out.println("$HERE?");
4113 FlowGraph fg = getFlowGraph(md);
4114 Map<Integer, CompositeLocation> mapParamToLoc = methodSummary.getMapParamIdxToInferLoc();
4115 Set<Integer> paramIdxSet = mapParamToLoc.keySet();
4117 if (md.getReturnType() != null && !md.getReturnType().isVoid()) {
4118 // first, generate the set of return value location types that starts
4119 // with 'this' reference
4121 Set<FlowNode> paramFlowNodeFlowingToReturnValueSet = getParamNodeFlowingToReturnValue(md);
4122 // System.out.println("paramFlowNodeFlowingToReturnValueSet="
4123 // + paramFlowNodeFlowingToReturnValueSet);
4125 Set<NTuple<Location>> tupleToBeHigherThanReturnLocSet = new HashSet<NTuple<Location>>();
4126 for (Iterator iterator = paramFlowNodeFlowingToReturnValueSet.iterator(); iterator.hasNext();) {
4127 FlowNode fn = (FlowNode) iterator.next();
4128 NTuple<Descriptor> paramDescTuple = fn.getCurrentDescTuple();
4129 tupleToBeHigherThanReturnLocSet.add(translateToLocTuple(md, paramDescTuple));
4132 Set<FlowNode> returnNodeSet = fg.getReturnNodeSet();
4133 for (Iterator iterator = returnNodeSet.iterator(); iterator.hasNext();) {
4134 FlowNode returnNode = (FlowNode) iterator.next();
4135 NTuple<Descriptor> returnDescTuple = returnNode.getCurrentDescTuple();
4136 tupleToBeHigherThanReturnLocSet.add(translateToLocTuple(md, returnDescTuple));
4138 // System.out.println("-flow graph's returnNodeSet=" + returnNodeSet);
4139 // System.out.println("tupleSetToBeHigherThanReturnLoc=" + tupleToBeHigherThanReturnLocSet);
4141 // Here, generates a return location in the method lattice that is lower than the
4142 // locFlowingToReturnValueSet
4143 NTuple<Location> returnLocTuple =
4144 generateLocTupleRelativeTo(md, tupleToBeHigherThanReturnLocSet, RLOC);
4146 // System.out.println("returnLocTuple=" + returnLocTuple);
4147 NTuple<Descriptor> returnDescTuple = translateToDescTuple(returnLocTuple);
4148 CompositeLocation curReturnLoc = methodSummary.getRETURNLoc();
4149 if (curReturnLoc == null || returnDescTuple.size() > curReturnLoc.getSize()) {
4150 methodSummary.setRETURNLoc(new CompositeLocation(returnLocTuple));
4152 for (Iterator iterator = tupleToBeHigherThanReturnLocSet.iterator(); iterator.hasNext();) {
4153 NTuple<Location> higherTuple = (NTuple<Location>) iterator.next();
4154 fg.addValueFlowEdge(translateToDescTuple(higherTuple), returnDescTuple);
4156 fg.getFlowNode(returnDescTuple).setSkeleton(true);
4160 // makes sure that PCLOC is higher than RETURNLOC
4161 CompositeLocation pcLoc = methodSummary.getPCLoc();
4162 if (!pcLoc.get(0).isTop()) {
4163 NTuple<Descriptor> pcLocDescTuple = translateToDescTuple(pcLoc.getTuple());
4164 fg.addValueFlowEdge(pcLocDescTuple, returnDescTuple);
4171 private void calculateExtraLocations(MethodDescriptor md) {
4172 // calcualte pcloc, returnloc,...
4174 System.out.println("\nSSJAVA:Calculate PCLOC/RETURNLOC locations: " + md);
4177 calculateRETURNLOC(md);
4181 private NTuple<Location> generateLocTupleRelativeTo(MethodDescriptor md,
4182 Set<NTuple<Location>> paramLocTupleHavingInFlowSet, String locNamePrefix) {
4184 // System.out.println("-generateLocTupleRelativeTo=" + paramLocTupleHavingInFlowSet);
4186 NTuple<Location> higherLocTuple = new NTuple<Location>();
4188 VarDescriptor thisVarDesc = md.getThis();
4189 // check if all paramter loc tuple is started with 'this' reference
4190 boolean hasParamNotStartedWithThisRef = false;
4194 Set<NTuple<Location>> paramLocTupleStartedWithThis = new HashSet<NTuple<Location>>();
4196 next: for (Iterator iterator = paramLocTupleHavingInFlowSet.iterator(); iterator.hasNext();) {
4197 NTuple<Location> paramLocTuple = (NTuple<Location>) iterator.next();
4198 Descriptor paramLocalDesc = paramLocTuple.get(0).getLocDescriptor();
4199 if (!paramLocalDesc.equals(thisVarDesc)) {
4201 Set<FlowNode> inNodeSet = getFlowGraph(md).getIncomingNodeSetByPrefix(paramLocalDesc);
4202 for (Iterator iterator2 = inNodeSet.iterator(); iterator2.hasNext();) {
4203 FlowNode flowNode = (FlowNode) iterator2.next();
4204 if (flowNode.getDescTuple().startsWith(thisVarDesc)) {
4205 // System.out.println("paramLocTuple=" + paramLocTuple + " is lower than THIS");
4209 hasParamNotStartedWithThisRef = true;
4211 } else if (paramLocTuple.size() > 1) {
4212 paramLocTupleStartedWithThis.add(paramLocTuple);
4213 if (minSize == 0 || minSize > paramLocTuple.size()) {
4214 minSize = paramLocTuple.size();
4219 // System.out.println("---paramLocTupleStartedWithThis=" + paramLocTupleStartedWithThis);
4220 Descriptor enclosingDesc = md;
4221 if (hasParamNotStartedWithThisRef) {
4222 // in this case, PCLOC will be the local location
4224 // all parameter is started with 'this', so PCLOC will be set relative to the composite
4225 // location started with 'this'.
4226 // for (int idx = 0; idx < minSize - 1; idx++) {
4227 for (int idx = 0; idx < 1; idx++) {
4228 Set<Descriptor> locDescSet = new HashSet<Descriptor>();
4229 Location curLoc = null;
4230 NTuple<Location> paramLocTuple = null;
4231 for (Iterator iterator = paramLocTupleStartedWithThis.iterator(); iterator.hasNext();) {
4232 paramLocTuple = (NTuple<Location>) iterator.next();
4233 // System.out.println("-----paramLocTuple=" + paramLocTuple + " idx=" + idx);
4234 curLoc = paramLocTuple.get(idx);
4235 Descriptor locDesc = curLoc.getLocDescriptor();
4236 locDescSet.add(locDesc);
4238 // System.out.println("-----locDescSet=" + locDescSet + " idx=" + idx);
4239 if (locDescSet.size() != 1) {
4242 Location newLocElement = new Location(curLoc.getDescriptor(), curLoc.getLocDescriptor());
4243 // System.out.println("newLocElement" + newLocElement);
4244 higherLocTuple.add(newLocElement);
4245 enclosingDesc = getClassTypeDescriptor(curLoc.getLocDescriptor());
4250 String locIdentifier = locNamePrefix + (locSeed++);
4251 NameDescriptor locDesc = new NameDescriptor(locIdentifier);
4252 Location newLoc = new Location(enclosingDesc, locDesc);
4253 higherLocTuple.add(newLoc);
4254 // System.out.println("---new loc tuple=" + higherLocTuple);
4256 return higherLocTuple;
4260 public ClassDescriptor getClassTypeDescriptor(Descriptor in) {
4262 if (in instanceof VarDescriptor) {
4263 return ((VarDescriptor) in).getType().getClassDesc();
4264 } else if (in instanceof FieldDescriptor) {
4265 return ((FieldDescriptor) in).getType().getClassDesc();
4267 // else if (in instanceof LocationDescriptor) {
4268 // // here is the case that the descriptor 'in' is the last element of the assigned composite
4270 // return ((VarDescriptor) locTuple.get(0).getLocDescriptor()).getType().getClassDesc();
4278 private Set<NTuple<Location>> calculateHighestLocTupleSet(
4279 Set<NTuple<Location>> paramLocTupleHavingInFlowSet) {
4281 Set<NTuple<Location>> highestSet = new HashSet<NTuple<Location>>();
4283 Iterator<NTuple<Location>> iterator = paramLocTupleHavingInFlowSet.iterator();
4284 NTuple<Location> highest = iterator.next();
4286 for (; iterator.hasNext();) {
4287 NTuple<Location> curLocTuple = (NTuple<Location>) iterator.next();
4288 if (isHigherThan(curLocTuple, highest)) {
4289 // System.out.println(curLocTuple + " is greater than " + highest);
4290 highest = curLocTuple;
4294 highestSet.add(highest);
4296 MethodDescriptor md = (MethodDescriptor) highest.get(0).getDescriptor();
4297 VarDescriptor thisVarDesc = md.getThis();
4299 // System.out.println("highest=" + highest);
4301 for (Iterator<NTuple<Location>> iter = paramLocTupleHavingInFlowSet.iterator(); iter.hasNext();) {
4302 NTuple<Location> curLocTuple = iter.next();
4304 if (!curLocTuple.equals(highest) && !hasOrderingRelation(highest, curLocTuple)) {
4306 // System.out.println("add it to the highest set=" + curLocTuple);
4307 highestSet.add(curLocTuple);
4316 private Set<String> getHigherLocSymbolThan(SSJavaLattice<String> lattice, String loc) {
4317 Set<String> higherLocSet = new HashSet<String>();
4319 Set<String> locSet = lattice.getTable().keySet();
4320 for (Iterator iterator = locSet.iterator(); iterator.hasNext();) {
4321 String element = (String) iterator.next();
4322 if (lattice.isGreaterThan(element, loc) && (!element.equals(lattice.getTopItem()))) {
4323 higherLocSet.add(element);
4326 return higherLocSet;
4329 private CompositeLocation getLowest(SSJavaLattice<String> methodLattice,
4330 Set<CompositeLocation> set) {
4332 CompositeLocation lowest = set.iterator().next();
4334 if (set.size() == 1) {
4338 for (Iterator iterator = set.iterator(); iterator.hasNext();) {
4339 CompositeLocation loc = (CompositeLocation) iterator.next();
4341 if ((!loc.equals(lowest)) && (!isComparable(methodLattice, lowest, loc))) {
4342 // if there is a case where composite locations are incomparable, just
4347 if ((!loc.equals(lowest)) && isGreaterThan(methodLattice, lowest, loc)) {
4354 private boolean isComparable(SSJavaLattice<String> methodLattice, CompositeLocation comp1,
4355 CompositeLocation comp2) {
4357 int size = comp1.getSize() >= comp2.getSize() ? comp2.getSize() : comp1.getSize();
4359 for (int idx = 0; idx < size; idx++) {
4360 Location loc1 = comp1.get(idx);
4361 Location loc2 = comp2.get(idx);
4363 Descriptor desc1 = loc1.getDescriptor();
4364 Descriptor desc2 = loc2.getDescriptor();
4366 if (!desc1.equals(desc2)) {
4367 throw new Error("Fail to compare " + comp1 + " and " + comp2);
4370 String symbol1 = loc1.getLocIdentifier();
4371 String symbol2 = loc2.getLocIdentifier();
4373 SSJavaLattice<String> lattice;
4375 lattice = methodLattice;
4377 lattice = getLattice(desc1);
4380 if (symbol1.equals(symbol2)) {
4382 } else if (!lattice.isComparable(symbol1, symbol2)) {
4391 private boolean isGreaterThan(SSJavaLattice<String> methodLattice, CompositeLocation comp1,
4392 CompositeLocation comp2) {
4394 int size = comp1.getSize() >= comp2.getSize() ? comp2.getSize() : comp1.getSize();
4396 for (int idx = 0; idx < size; idx++) {
4397 Location loc1 = comp1.get(idx);
4398 Location loc2 = comp2.get(idx);
4400 Descriptor desc1 = loc1.getDescriptor();
4401 Descriptor desc2 = loc2.getDescriptor();
4403 if (!desc1.equals(desc2)) {
4404 throw new Error("Fail to compare " + comp1 + " and " + comp2);
4407 String symbol1 = loc1.getLocIdentifier();
4408 String symbol2 = loc2.getLocIdentifier();
4410 SSJavaLattice<String> lattice;
4412 lattice = methodLattice;
4414 lattice = getLattice(desc1);
4417 if (symbol1.equals(symbol2)) {
4419 } else if (lattice.isGreaterThan(symbol1, symbol2)) {
4430 private GlobalFlowGraph getSubGlobalFlowGraph(MethodDescriptor md) {
4432 if (!mapMethodDescriptorToSubGlobalFlowGraph.containsKey(md)) {
4433 mapMethodDescriptorToSubGlobalFlowGraph.put(md, new GlobalFlowGraph(md));
4435 return mapMethodDescriptorToSubGlobalFlowGraph.get(md);
4438 private void propagateFlowsToCallerWithNoCompositeLocation(MethodInvokeNode min,
4439 MethodDescriptor mdCaller, MethodDescriptor mdCallee) {
4441 // System.out.println("-propagateFlowsToCallerWithNoCompositeLocation=" + min.printNode(0));
4442 // if the parameter A reaches to the parameter B
4443 // then, add an edge the argument A -> the argument B to the caller's flow
4446 FlowGraph calleeFlowGraph = getFlowGraph(mdCallee);
4447 FlowGraph callerFlowGraph = getFlowGraph(mdCaller);
4448 int numParam = calleeFlowGraph.getNumParameters();
4450 for (int i = 0; i < numParam; i++) {
4451 for (int k = 0; k < numParam; k++) {
4455 FlowNode paramNode1 = calleeFlowGraph.getParamFlowNode(i);
4456 FlowNode paramNode2 = calleeFlowGraph.getParamFlowNode(k);
4458 NTuple<Descriptor> arg1Tuple = getNodeTupleByArgIdx(min, i);
4459 NTuple<Descriptor> arg2Tuple = getNodeTupleByArgIdx(min, k);
4461 // check if the callee propagates an ordering constraints through
4464 // Set<FlowNode> localReachSet = calleeFlowGraph.getLocalReachFlowNodeSetFrom(paramNode1);
4465 Set<FlowNode> localReachSet =
4466 calleeFlowGraph.getReachableSetFrom(paramNode1.getDescTuple());
4468 NTuple<Descriptor> paramDescTuple1 = paramNode1.getCurrentDescTuple();
4469 NTuple<Descriptor> paramDescTuple2 = paramNode2.getCurrentDescTuple();
4471 // System.out.println("-param1CurTuple=" + paramDescTuple1 + " param2CurTuple="
4472 // + paramDescTuple2);
4473 // System.out.println("-- localReachSet from param1=" + localReachSet);
4475 if (paramDescTuple1.get(0).equals(paramDescTuple2.get(0))) {
4476 // if two parameters share the same prefix
4477 // it already has been assigned to a composite location
4478 // so we don't need to add an additional ordering relation caused by these two
4483 if (arg1Tuple.size() > 0 && arg2Tuple.size() > 0
4484 && containsPrefix(paramNode2.getDescTuple().get(0), localReachSet)) {
4485 // need to propagate an ordering relation s.t. arg1 is higher
4487 // System.out.println("-param1=" + paramNode1 + " is higher than param2=" + paramNode2);
4489 // add a new flow between the corresponding arguments.
4490 callerFlowGraph.addValueFlowEdge(arg1Tuple, arg2Tuple);
4491 // System.out.println("arg1=" + arg1Tuple + " arg2=" + arg2Tuple);
4494 // .println("-arg1Tuple=" + arg1Tuple + " is higher than arg2Tuple=" + arg2Tuple);
4498 // System.out.println();
4503 // if a parameter has a composite location and the first element of the parameter location
4504 // matches the callee's 'this'
4505 // we have a more specific constraint: the caller's corresponding argument is higher than the
4506 // parameter location which is translated into the caller
4508 for (int idx = 0; idx < numParam; idx++) {
4509 FlowNode paramNode = calleeFlowGraph.getParamFlowNode(idx);
4510 CompositeLocation compLoc = paramNode.getCompositeLocation();
4511 // System.out.println("paramNode=" + paramNode + " compLoc=" + compLoc);
4512 if (compLoc != null && compLoc.get(0).getLocDescriptor().equals(min.getMethod().getThis())) {
4513 // System.out.println("$$$COMPLOC CASE=" + compLoc + " idx=" + idx);
4515 NTuple<Descriptor> argTuple = getNodeTupleByArgIdx(min, idx);
4516 // System.out.println("--- argTuple=" + argTuple + " current compLoc="
4517 // + callerFlowGraph.getFlowNode(argTuple).getCompositeLocation());
4519 NTuple<Descriptor> translatedParamTuple =
4520 translateCompositeLocationToCaller(idx, min, compLoc);
4521 // System.out.println("add a flow edge= " + argTuple + "->" + translatedParamTuple);
4522 callerFlowGraph.addValueFlowEdge(argTuple, translatedParamTuple);
4524 Set<NTuple<Location>> pcLocTupleSet = getPCLocTupleSet(min);
4525 for (Iterator iterator = pcLocTupleSet.iterator(); iterator.hasNext();) {
4526 NTuple<Location> pcLocTuple = (NTuple<Location>) iterator.next();
4527 callerFlowGraph.addValueFlowEdge(translateToDescTuple(pcLocTuple), translatedParamTuple);
4535 private boolean containsPrefix(Descriptor prefixDesc, Set<FlowNode> set) {
4537 for (Iterator iterator = set.iterator(); iterator.hasNext();) {
4538 FlowNode flowNode = (FlowNode) iterator.next();
4539 if (flowNode.getDescTuple().startsWith(prefixDesc)) {
4540 // System.out.println("FOUND=" + flowNode);
4547 private NTuple<Descriptor> translateCompositeLocationToCaller(int idx, MethodInvokeNode min,
4548 CompositeLocation compLocForParam1) {
4550 NTuple<Descriptor> baseTuple = mapMethodInvokeNodeToBaseTuple.get(min);
4552 NTuple<Descriptor> tuple = new NTuple<Descriptor>();
4553 for (int i = 0; i < baseTuple.size(); i++) {
4554 tuple.add(baseTuple.get(i));
4557 for (int i = 1; i < compLocForParam1.getSize(); i++) {
4558 Location loc = compLocForParam1.get(i);
4559 tuple.add(loc.getLocDescriptor());
4565 private CompositeLocation generateCompositeLocation(NTuple<Location> prefixLocTuple) {
4567 // System.out.println("generateCompositeLocation=" + prefixLocTuple);
4569 CompositeLocation newCompLoc = new CompositeLocation();
4570 for (int i = 0; i < prefixLocTuple.size(); i++) {
4571 newCompLoc.addLocation(prefixLocTuple.get(i));
4574 Descriptor lastDescOfPrefix = prefixLocTuple.get(prefixLocTuple.size() - 1).getLocDescriptor();
4576 ClassDescriptor enclosingDescriptor;
4577 if (lastDescOfPrefix instanceof FieldDescriptor) {
4578 enclosingDescriptor = ((FieldDescriptor) lastDescOfPrefix).getType().getClassDesc();
4579 // System.out.println("enclosingDescriptor0=" + enclosingDescriptor);
4580 } else if (lastDescOfPrefix.equals(GLOBALDESC)) {
4581 MethodDescriptor currentMethodDesc = (MethodDescriptor) prefixLocTuple.get(0).getDescriptor();
4582 enclosingDescriptor = currentMethodDesc.getClassDesc();
4584 // var descriptor case
4585 enclosingDescriptor = ((VarDescriptor) lastDescOfPrefix).getType().getClassDesc();
4587 // System.out.println("enclosingDescriptor=" + enclosingDescriptor);
4589 LocationDescriptor newLocDescriptor = generateNewLocationDescriptor();
4590 newLocDescriptor.setEnclosingClassDesc(enclosingDescriptor);
4592 Location newLoc = new Location(enclosingDescriptor, newLocDescriptor.getSymbol());
4593 newLoc.setLocDescriptor(newLocDescriptor);
4594 newCompLoc.addLocation(newLoc);
4596 // System.out.println("--newCompLoc=" + newCompLoc);
4600 private CompositeLocation generateCompositeLocation(MethodDescriptor md,
4601 NTuple<Descriptor> paramPrefix) {
4603 // System.out.println("generateCompositeLocation=" + paramPrefix);
4605 CompositeLocation newCompLoc = convertToCompositeLocation(md, paramPrefix);
4607 Descriptor lastDescOfPrefix = paramPrefix.get(paramPrefix.size() - 1);
4608 // System.out.println("lastDescOfPrefix=" + lastDescOfPrefix + " kind="
4609 // + lastDescOfPrefix.getClass());
4610 ClassDescriptor enclosingDescriptor;
4611 if (lastDescOfPrefix instanceof FieldDescriptor) {
4612 enclosingDescriptor = ((FieldDescriptor) lastDescOfPrefix).getType().getClassDesc();
4613 // System.out.println("enclosingDescriptor0=" + enclosingDescriptor);
4615 // var descriptor case
4616 enclosingDescriptor = ((VarDescriptor) lastDescOfPrefix).getType().getClassDesc();
4618 // System.out.println("enclosingDescriptor=" + enclosingDescriptor);
4620 LocationDescriptor newLocDescriptor = generateNewLocationDescriptor();
4621 newLocDescriptor.setEnclosingClassDesc(enclosingDescriptor);
4623 Location newLoc = new Location(enclosingDescriptor, newLocDescriptor.getSymbol());
4624 newLoc.setLocDescriptor(newLocDescriptor);
4625 newCompLoc.addLocation(newLoc);
4627 // System.out.println("--newCompLoc=" + newCompLoc);
4631 private List<NTuple<Descriptor>> translatePrefixListToCallee(Descriptor baseRef,
4632 MethodDescriptor mdCallee, List<NTuple<Descriptor>> callerPrefixList) {
4634 List<NTuple<Descriptor>> calleePrefixList = new ArrayList<NTuple<Descriptor>>();
4636 for (int i = 0; i < callerPrefixList.size(); i++) {
4637 NTuple<Descriptor> prefix = callerPrefixList.get(i);
4638 if (prefix.startsWith(baseRef)) {
4639 NTuple<Descriptor> calleePrefix = new NTuple<Descriptor>();
4640 calleePrefix.add(mdCallee.getThis());
4641 for (int k = 1; k < prefix.size(); k++) {
4642 calleePrefix.add(prefix.get(k));
4644 calleePrefixList.add(calleePrefix);
4648 return calleePrefixList;
4652 public CompositeLocation convertToCompositeLocation(MethodDescriptor md, NTuple<Descriptor> tuple) {
4654 CompositeLocation compLoc = new CompositeLocation();
4656 Descriptor enclosingDescriptor = md;
4658 for (int i = 0; i < tuple.size(); i++) {
4659 Descriptor curDescriptor = tuple.get(i);
4660 Location locElement = new Location(enclosingDescriptor, curDescriptor.getSymbol());
4661 locElement.setLocDescriptor(curDescriptor);
4662 compLoc.addLocation(locElement);
4664 if (curDescriptor instanceof VarDescriptor) {
4665 enclosingDescriptor = md.getClassDesc();
4666 } else if (curDescriptor instanceof FieldDescriptor) {
4667 enclosingDescriptor = ((FieldDescriptor) curDescriptor).getClassDescriptor();
4668 } else if (curDescriptor instanceof NameDescriptor) {
4669 // it is "GLOBAL LOC" case!
4670 enclosingDescriptor = GLOBALDESC;
4671 } else if (curDescriptor instanceof InterDescriptor) {
4672 enclosingDescriptor = getFlowGraph(md).getEnclosingDescriptor(curDescriptor);
4674 enclosingDescriptor = null;
4682 private LocationDescriptor generateNewLocationDescriptor() {
4683 return new LocationDescriptor("Loc" + (locSeed++));
4686 private int getPrefixIndex(NTuple<Descriptor> tuple1, NTuple<Descriptor> tuple2) {
4688 // return the index where the prefix shared by tuple1 and tuple2 is ended
4689 // if there is no prefix shared by both of them, return -1
4691 int minSize = tuple1.size();
4692 if (minSize > tuple2.size()) {
4693 minSize = tuple2.size();
4697 for (int i = 0; i < minSize; i++) {
4698 if (!tuple1.get(i).equals(tuple2.get(i))) {
4708 private CompositeLocation generateInferredCompositeLocation(MethodLocationInfo methodInfo,
4709 NTuple<Location> tuple) {
4711 // first, retrieve inferred location by the local var descriptor
4712 CompositeLocation inferLoc = new CompositeLocation();
4714 CompositeLocation localVarInferLoc =
4715 methodInfo.getInferLocation(tuple.get(0).getLocDescriptor());
4717 localVarInferLoc.get(0).setLocDescriptor(tuple.get(0).getLocDescriptor());
4719 for (int i = 0; i < localVarInferLoc.getSize(); i++) {
4720 inferLoc.addLocation(localVarInferLoc.get(i));
4723 for (int i = 1; i < tuple.size(); i++) {
4724 Location cur = tuple.get(i);
4725 Descriptor enclosingDesc = cur.getDescriptor();
4726 Descriptor curDesc = cur.getLocDescriptor();
4728 Location inferLocElement;
4729 if (curDesc == null) {
4730 // in this case, we have a newly generated location.
4731 inferLocElement = new Location(enclosingDesc, cur.getLocIdentifier());
4733 String fieldLocSymbol =
4734 getLocationInfo(enclosingDesc).getInferLocation(curDesc).get(0).getLocIdentifier();
4735 inferLocElement = new Location(enclosingDesc, fieldLocSymbol);
4736 inferLocElement.setLocDescriptor(curDesc);
4739 inferLoc.addLocation(inferLocElement);
4743 assert (inferLoc.get(0).getLocDescriptor().getSymbol() == inferLoc.get(0).getLocIdentifier());
4747 public LocationInfo getLocationInfo(Descriptor d) {
4748 if (d instanceof MethodDescriptor) {
4749 return getMethodLocationInfo((MethodDescriptor) d);
4751 return getFieldLocationInfo((ClassDescriptor) d);
4755 private MethodLocationInfo getMethodLocationInfo(MethodDescriptor md) {
4757 if (!mapMethodDescToMethodLocationInfo.containsKey(md)) {
4758 mapMethodDescToMethodLocationInfo.put(md, new MethodLocationInfo(md));
4761 return mapMethodDescToMethodLocationInfo.get(md);
4765 private LocationInfo getFieldLocationInfo(ClassDescriptor cd) {
4767 if (!mapClassToLocationInfo.containsKey(cd)) {
4768 mapClassToLocationInfo.put(cd, new LocationInfo(cd));
4771 return mapClassToLocationInfo.get(cd);
4775 private void addPrefixMapping(Map<NTuple<Location>, Set<NTuple<Location>>> map,
4776 NTuple<Location> prefix, NTuple<Location> element) {
4778 if (!map.containsKey(prefix)) {
4779 map.put(prefix, new HashSet<NTuple<Location>>());
4781 map.get(prefix).add(element);
4784 private boolean containsNonPrimitiveElement(Set<Descriptor> descSet) {
4785 for (Iterator iterator = descSet.iterator(); iterator.hasNext();) {
4786 Descriptor desc = (Descriptor) iterator.next();
4788 if (desc.equals(LocationInference.GLOBALDESC)) {
4790 } else if (desc instanceof VarDescriptor) {
4791 if (!((VarDescriptor) desc).getType().isPrimitive()) {
4794 } else if (desc instanceof FieldDescriptor) {
4795 if (!((FieldDescriptor) desc).getType().isPrimitive()) {
4804 public SSJavaLattice<String> getLattice(Descriptor d) {
4805 if (d instanceof MethodDescriptor) {
4806 return getMethodLattice((MethodDescriptor) d);
4808 return getFieldLattice((ClassDescriptor) d);
4812 private SSJavaLattice<String> getMethodLattice(MethodDescriptor md) {
4813 if (!md2lattice.containsKey(md)) {
4814 md2lattice.put(md, new SSJavaLattice<String>(SSJavaAnalysis.TOP, SSJavaAnalysis.BOTTOM));
4816 return md2lattice.get(md);
4819 private void setMethodLattice(MethodDescriptor md, SSJavaLattice<String> lattice) {
4820 md2lattice.put(md, lattice);
4823 private void extractFlowsBetweenFields(ClassDescriptor cd, FlowNode srcNode, FlowNode dstNode,
4826 NTuple<Descriptor> srcCurTuple = srcNode.getCurrentDescTuple();
4827 NTuple<Descriptor> dstCurTuple = dstNode.getCurrentDescTuple();
4829 if (srcCurTuple.get(idx).equals(dstCurTuple.get(idx)) && srcCurTuple.size() > (idx + 1)
4830 && dstCurTuple.size() > (idx + 1)) {
4831 // value flow between fields: we don't need to add a binary relation
4834 Descriptor desc = srcCurTuple.get(idx);
4835 ClassDescriptor classDesc;
4838 classDesc = ((VarDescriptor) desc).getType().getClassDesc();
4840 if (desc instanceof FieldDescriptor) {
4841 classDesc = ((FieldDescriptor) desc).getType().getClassDesc();
4843 // this case is that the local variable has a composite location assignment
4844 // the following element after the composite location to the local variable
4845 // has the enclosing descriptor of the local variable
4846 Descriptor localDesc = srcNode.getDescTuple().get(0);
4847 classDesc = ((VarDescriptor) localDesc).getType().getClassDesc();
4850 extractFlowsBetweenFields(classDesc, srcNode, dstNode, idx + 1);
4854 Descriptor srcFieldDesc = srcCurTuple.get(idx);
4855 Descriptor dstFieldDesc = dstCurTuple.get(idx);
4857 // System.out.println("srcFieldDesc=" + srcFieldDesc + " dstFieldDesc=" + dstFieldDesc
4858 // + " idx=" + idx);
4859 if (!srcFieldDesc.equals(dstFieldDesc)) {
4861 // System.out.println("-ADD EDGE");
4862 getHierarchyGraph(cd).addEdge(srcFieldDesc, dstFieldDesc);
4863 } else if (!isReference(srcFieldDesc) && !isReference(dstFieldDesc)) {
4864 // System.out.println("-ADD EDGE");
4865 getHierarchyGraph(cd).addEdge(srcFieldDesc, dstFieldDesc);
4872 public SSJavaLattice<String> getFieldLattice(ClassDescriptor cd) {
4873 if (!cd2lattice.containsKey(cd)) {
4874 cd2lattice.put(cd, new SSJavaLattice<String>(SSJavaAnalysis.TOP, SSJavaAnalysis.BOTTOM));
4876 return cd2lattice.get(cd);
4879 public LinkedList<MethodDescriptor> computeMethodList() {
4881 Set<MethodDescriptor> toSort = new HashSet<MethodDescriptor>();
4885 Set<MethodDescriptor> visited = new HashSet<MethodDescriptor>();
4886 Set<MethodDescriptor> reachableCallee = new HashSet<MethodDescriptor>();
4888 while (!toAnalyzeIsEmpty()) {
4889 ClassDescriptor cd = toAnalyzeNext();
4891 if (cd.getClassName().equals("Object")) {
4892 rootClassDescriptor = cd;
4893 // inheritanceTree = new InheritanceTree<ClassDescriptor>(cd);
4896 setupToAnalazeMethod(cd);
4897 temp_toanalyzeMethodList.removeAll(visited);
4899 while (!toAnalyzeMethodIsEmpty()) {
4900 MethodDescriptor md = toAnalyzeMethodNext();
4901 if ((!visited.contains(md))
4902 && (ssjava.needTobeAnnotated(md) || reachableCallee.contains(md))) {
4904 // creates a mapping from a method descriptor to virtual methods
4905 Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
4906 if (md.isStatic()) {
4907 setPossibleCallees.add(md);
4909 setPossibleCallees.addAll(ssjava.getCallGraph().getMethods(md));
4912 Set<MethodDescriptor> calleeSet = ssjava.getCallGraph().getCalleeSet(md);
4913 Set<MethodDescriptor> needToAnalyzeCalleeSet = new HashSet<MethodDescriptor>();
4915 for (Iterator iterator = calleeSet.iterator(); iterator.hasNext();) {
4916 MethodDescriptor calleemd = (MethodDescriptor) iterator.next();
4917 if ((!ssjava.isTrustMethod(calleemd))
4918 && (!ssjava.isSSJavaUtil(calleemd.getClassDesc()))
4919 && (!calleemd.getModifiers().isNative())) {
4920 if (!visited.contains(calleemd)) {
4921 temp_toanalyzeMethodList.add(calleemd);
4923 reachableCallee.add(calleemd);
4924 needToAnalyzeCalleeSet.add(calleemd);
4928 mapMethodToCalleeSet.put(md, needToAnalyzeCalleeSet);
4937 return ssjava.topologicalSort(toSort);
4941 public boolean isTransitivelyCalledFrom(MethodDescriptor callee, MethodDescriptor caller) {
4942 // if the callee is transitively invoked from the caller
4945 int callerIdx = toanalyze_methodDescList.indexOf(caller);
4946 int calleeIdx = toanalyze_methodDescList.indexOf(callee);
4948 if (callerIdx < calleeIdx) {
4956 public void constructFlowGraph() {
4958 System.out.println("");
4959 toanalyze_methodDescList = computeMethodList();
4961 // hack... it seems that there is a problem with topological sorting.
4962 // so String.toString(Object o) is appeared too higher in the call chain.
4963 MethodDescriptor mdToString1 = null;
4964 MethodDescriptor mdToString2 = null;
4965 for (Iterator iterator = toanalyze_methodDescList.iterator(); iterator.hasNext();) {
4966 MethodDescriptor md = (MethodDescriptor) iterator.next();
4967 if (md.toString().equals("public static String String.valueOf(Object o)")) {
4970 if (md.toString().equals("public String Object.toString()")) {
4975 if (mdToString1 != null) {
4976 toanalyze_methodDescList.remove(mdToString1);
4977 toanalyze_methodDescList.addLast(mdToString1);
4979 if (mdToString2 != null) {
4980 toanalyze_methodDescList.remove(mdToString2);
4981 toanalyze_methodDescList.addLast(mdToString2);
4984 LinkedList<MethodDescriptor> methodDescList =
4985 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
4987 // System.out.println("@@@methodDescList=" + methodDescList);
4990 while (!methodDescList.isEmpty()) {
4991 MethodDescriptor md = methodDescList.removeLast();
4992 if (state.SSJAVADEBUG) {
4993 System.out.println();
4994 System.out.println("SSJAVA: Constructing a flow graph: " + md);
4996 // creates a mapping from a parameter descriptor to its index
4997 Map<Descriptor, Integer> mapParamDescToIdx = new HashMap<Descriptor, Integer>();
4999 if (!md.isStatic()) {
5001 mapParamDescToIdx.put(md.getThis(), 0);
5004 for (int i = 0; i < md.numParameters(); i++) {
5005 Descriptor paramDesc = (Descriptor) md.getParameter(i);
5006 mapParamDescToIdx.put(paramDesc, new Integer(i + offset));
5009 FlowGraph fg = new FlowGraph(md, mapParamDescToIdx);
5010 mapMethodDescriptorToFlowGraph.put(md, fg);
5012 analyzeMethodBody(md.getClassDesc(), md);
5014 // System.out.println("##constructSubGlobalFlowGraph");
5015 // GlobalFlowGraph subGlobalFlowGraph = constructSubGlobalFlowGraph(fg);
5016 // mapMethodDescriptorToSubGlobalFlowGraph.put(md, subGlobalFlowGraph);
5019 // System.out.println("##addValueFlowsFromCalleeSubGlobalFlowGraph");
5020 // addValueFlowsFromCalleeSubGlobalFlowGraph(md, subGlobalFlowGraph);
5021 // subGlobalFlowGraph.writeGraph("_SUBGLOBAL");
5023 // propagateFlowsFromCalleesWithNoCompositeLocation(md);
5026 // _debug_printGraph();
5030 private void constructGlobalFlowGraph() {
5031 LinkedList<MethodDescriptor> methodDescList =
5032 (LinkedList<MethodDescriptor>) toanalyze_methodDescList.clone();
5034 while (!methodDescList.isEmpty()) {
5035 MethodDescriptor md = methodDescList.removeLast();
5036 if (state.SSJAVADEBUG) {
5037 System.out.println();
5038 System.out.println("SSJAVA: Constructing a sub global flow graph: " + md);
5040 constructSubGlobalFlowGraph(getFlowGraph(md));
5043 // System.out.println("-add Value Flows From CalleeSubGlobalFlowGraph");
5044 addValueFlowsFromCalleeSubGlobalFlowGraph(md);
5045 // subGlobalFlowGraph.writeGraph("_SUBGLOBAL");
5047 // System.out.println("-propagate Flows From Callees With No CompositeLocation");
5048 // propagateFlowsFromCalleesWithNoCompositeLocation(md);
5050 // mark if a parameter has incoming flows
5051 checkParamNodesInSubGlobalFlowGraph(md);
5057 private void checkParamNodesInSubGlobalFlowGraph(MethodDescriptor md) {
5058 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
5059 FlowGraph flowGraph = getFlowGraph(md);
5061 Set<FlowNode> paramFlowNodeSet = flowGraph.getParamFlowNodeSet();
5062 for (Iterator iterator = paramFlowNodeSet.iterator(); iterator.hasNext();) {
5063 FlowNode paramFlowNode = (FlowNode) iterator.next();
5064 // System.out.println("paramFlowNode=" + paramFlowNode);
5065 NTuple<Descriptor> paramDescTuple = paramFlowNode.getDescTuple();
5066 NTuple<Location> paramLocTuple = translateToLocTuple(md, paramDescTuple);
5067 GlobalFlowNode paramGlobalNode = globalFlowGraph.getFlowNode(paramLocTuple);
5069 Set<GlobalFlowNode> incomingNodeSet =
5070 globalFlowGraph.getIncomingNodeSetByPrefix(paramLocTuple.get(0));
5072 if (incomingNodeSet.size() > 0) {
5073 paramGlobalNode.setParamNodeWithIncomingFlows(true);
5079 private Set<MethodInvokeNode> getMethodInvokeNodeSet(MethodDescriptor md) {
5080 if (!mapMethodDescriptorToMethodInvokeNodeSet.containsKey(md)) {
5081 mapMethodDescriptorToMethodInvokeNodeSet.put(md, new HashSet<MethodInvokeNode>());
5083 return mapMethodDescriptorToMethodInvokeNodeSet.get(md);
5086 private void propagateFlowsFromCalleesWithNoCompositeLocation(MethodDescriptor mdCaller) {
5088 // the transformation for a call site propagates flows through parameters
5089 // if the method is virtual, it also grab all relations from any possible
5092 Set<MethodInvokeNode> setMethodInvokeNode =
5093 mapMethodDescriptorToMethodInvokeNodeSet.get(mdCaller);
5095 if (setMethodInvokeNode != null) {
5097 for (Iterator iterator = setMethodInvokeNode.iterator(); iterator.hasNext();) {
5098 MethodInvokeNode min = (MethodInvokeNode) iterator.next();
5099 MethodDescriptor mdCallee = min.getMethod();
5100 Set<MethodDescriptor> setPossibleCallees = new HashSet<MethodDescriptor>();
5101 if (mdCallee.isStatic()) {
5102 setPossibleCallees.add(mdCallee);
5104 Set<MethodDescriptor> calleeSet = ssjava.getCallGraph().getMethods(mdCallee);
5105 // removes method descriptors that are not invoked by the caller
5106 calleeSet.retainAll(mapMethodToCalleeSet.get(mdCaller));
5107 setPossibleCallees.addAll(calleeSet);
5110 for (Iterator iterator2 = setPossibleCallees.iterator(); iterator2.hasNext();) {
5111 MethodDescriptor possibleMdCallee = (MethodDescriptor) iterator2.next();
5112 propagateFlowsToCallerWithNoCompositeLocation(min, mdCaller, possibleMdCallee);
5120 private void analyzeMethodBody(ClassDescriptor cd, MethodDescriptor md) {
5121 BlockNode bn = state.getMethodBody(md);
5122 NodeTupleSet implicitFlowTupleSet = new NodeTupleSet();
5123 analyzeFlowBlockNode(md, md.getParameterTable(), bn, implicitFlowTupleSet);
5126 private void analyzeFlowBlockNode(MethodDescriptor md, SymbolTable nametable, BlockNode bn,
5127 NodeTupleSet implicitFlowTupleSet) {
5129 bn.getVarTable().setParent(nametable);
5130 for (int i = 0; i < bn.size(); i++) {
5131 BlockStatementNode bsn = bn.get(i);
5132 analyzeBlockStatementNode(md, bn.getVarTable(), bsn, implicitFlowTupleSet);
5137 private void analyzeBlockStatementNode(MethodDescriptor md, SymbolTable nametable,
5138 BlockStatementNode bsn, NodeTupleSet implicitFlowTupleSet) {
5140 switch (bsn.kind()) {
5141 case Kind.BlockExpressionNode:
5142 analyzeBlockExpressionNode(md, nametable, (BlockExpressionNode) bsn, implicitFlowTupleSet);
5145 case Kind.DeclarationNode:
5146 analyzeFlowDeclarationNode(md, nametable, (DeclarationNode) bsn, implicitFlowTupleSet);
5149 case Kind.IfStatementNode:
5150 analyzeFlowIfStatementNode(md, nametable, (IfStatementNode) bsn, implicitFlowTupleSet);
5154 analyzeFlowLoopNode(md, nametable, (LoopNode) bsn, implicitFlowTupleSet);
5157 case Kind.ReturnNode:
5158 analyzeFlowReturnNode(md, nametable, (ReturnNode) bsn, implicitFlowTupleSet);
5161 case Kind.SubBlockNode:
5162 analyzeFlowSubBlockNode(md, nametable, (SubBlockNode) bsn, implicitFlowTupleSet);
5165 case Kind.ContinueBreakNode:
5168 case Kind.SwitchStatementNode:
5169 analyzeSwitchStatementNode(md, nametable, (SwitchStatementNode) bsn, implicitFlowTupleSet);
5176 private void analyzeSwitchBlockNode(MethodDescriptor md, SymbolTable nametable,
5177 SwitchBlockNode sbn, NodeTupleSet implicitFlowTupleSet) {
5179 analyzeFlowBlockNode(md, nametable, sbn.getSwitchBlockStatement(), implicitFlowTupleSet);
5183 private void analyzeSwitchStatementNode(MethodDescriptor md, SymbolTable nametable,
5184 SwitchStatementNode ssn, NodeTupleSet implicitFlowTupleSet) {
5186 NodeTupleSet condTupleNode = new NodeTupleSet();
5187 analyzeFlowExpressionNode(md, nametable, ssn.getCondition(), condTupleNode, null,
5188 implicitFlowTupleSet, false);
5190 NodeTupleSet newImplicitTupleSet = new NodeTupleSet();
5192 newImplicitTupleSet.addTupleSet(implicitFlowTupleSet);
5193 newImplicitTupleSet.addTupleSet(condTupleNode);
5195 if (needToGenerateInterLoc(newImplicitTupleSet)) {
5196 // need to create an intermediate node for the GLB of conditional
5197 // locations & implicit flows
5199 NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5200 for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter.hasNext();) {
5201 NTuple<Descriptor> tuple = idxIter.next();
5202 addFlowGraphEdge(md, tuple, interTuple);
5204 newImplicitTupleSet.clear();
5205 newImplicitTupleSet.addTuple(interTuple);
5208 BlockNode sbn = ssn.getSwitchBody();
5209 for (int i = 0; i < sbn.size(); i++) {
5210 analyzeSwitchBlockNode(md, nametable, (SwitchBlockNode) sbn.get(i), newImplicitTupleSet);
5215 private void analyzeFlowSubBlockNode(MethodDescriptor md, SymbolTable nametable,
5216 SubBlockNode sbn, NodeTupleSet implicitFlowTupleSet) {
5217 analyzeFlowBlockNode(md, nametable, sbn.getBlockNode(), implicitFlowTupleSet);
5220 private void analyzeFlowReturnNode(MethodDescriptor md, SymbolTable nametable, ReturnNode rn,
5221 NodeTupleSet implicitFlowTupleSet) {
5223 // System.out.println("-analyzeFlowReturnNode=" + rn.printNode(0));
5224 ExpressionNode returnExp = rn.getReturnExpression();
5226 if (returnExp != null) {
5227 NodeTupleSet nodeSet = new NodeTupleSet();
5228 // if a return expression returns a literal value, nodeSet is empty
5229 analyzeFlowExpressionNode(md, nametable, returnExp, nodeSet, false);
5230 FlowGraph fg = getFlowGraph(md);
5232 // if (implicitFlowTupleSet.size() == 1
5234 // fg.getFlowNode(implicitFlowTupleSet.iterator().next()).isIntermediate())
5237 // // since there is already an intermediate node for the GLB of implicit
5239 // // we don't need to create another intermediate node.
5240 // // just re-use the intermediate node for implicit flows.
5242 // FlowNode meetNode =
5243 // fg.getFlowNode(implicitFlowTupleSet.iterator().next());
5245 // for (Iterator iterator = nodeSet.iterator(); iterator.hasNext();) {
5246 // NTuple<Descriptor> returnNodeTuple = (NTuple<Descriptor>)
5248 // fg.addValueFlowEdge(returnNodeTuple, meetNode.getDescTuple());
5253 NodeTupleSet currentFlowTupleSet = new NodeTupleSet();
5255 // add tuples from return node
5256 currentFlowTupleSet.addTupleSet(nodeSet);
5258 // add tuples corresponding to the current implicit flows
5259 currentFlowTupleSet.addTupleSet(implicitFlowTupleSet);
5261 // System.out.println("---currentFlowTupleSet=" + currentFlowTupleSet);
5263 if (needToGenerateInterLoc(currentFlowTupleSet)) {
5265 FlowNode meetNode = fg.createIntermediateNode();
5266 for (Iterator iterator = currentFlowTupleSet.iterator(); iterator.hasNext();) {
5267 NTuple<Descriptor> currentFlowTuple = (NTuple<Descriptor>) iterator.next();
5268 fg.addValueFlowEdge(currentFlowTuple, meetNode.getDescTuple());
5270 fg.addReturnFlowNode(meetNode.getDescTuple());
5272 // currentFlowTupleSet = removeLiteralTuple(currentFlowTupleSet);
5273 for (Iterator iterator = currentFlowTupleSet.iterator(); iterator.hasNext();) {
5274 NTuple<Descriptor> currentFlowTuple = (NTuple<Descriptor>) iterator.next();
5275 fg.addReturnFlowNode(currentFlowTuple);
5283 private NodeTupleSet removeLiteralTuple(NodeTupleSet inSet) {
5284 NodeTupleSet tupleSet = new NodeTupleSet();
5285 for (Iterator<NTuple<Descriptor>> iter = inSet.iterator(); iter.hasNext();) {
5286 NTuple<Descriptor> tuple = iter.next();
5287 if (!tuple.get(0).equals(LITERALDESC)) {
5288 tupleSet.addTuple(tuple);
5294 private boolean needToGenerateInterLoc(NodeTupleSet tupleSet) {
5296 for (Iterator<NTuple<Descriptor>> iter = tupleSet.iterator(); iter.hasNext();) {
5297 NTuple<Descriptor> descTuple = iter.next();
5298 if (!descTuple.get(0).equals(LITERALDESC)) {
5303 // System.out.println("needToGenerateInterLoc=" + tupleSet + " size=" + size);
5310 private void analyzeFlowLoopNode(MethodDescriptor md, SymbolTable nametable, LoopNode ln,
5311 NodeTupleSet implicitFlowTupleSet) {
5313 if (ln.getType() == LoopNode.WHILELOOP || ln.getType() == LoopNode.DOWHILELOOP) {
5315 NodeTupleSet condTupleNode = new NodeTupleSet();
5316 analyzeFlowExpressionNode(md, nametable, ln.getCondition(), condTupleNode, null,
5317 implicitFlowTupleSet, false);
5319 NodeTupleSet newImplicitTupleSet = new NodeTupleSet();
5321 newImplicitTupleSet.addTupleSet(implicitFlowTupleSet);
5322 newImplicitTupleSet.addTupleSet(condTupleNode);
5324 newImplicitTupleSet.addGlobalFlowTupleSet(implicitFlowTupleSet.getGlobalLocTupleSet());
5325 newImplicitTupleSet.addGlobalFlowTupleSet(condTupleNode.getGlobalLocTupleSet());
5327 if (needToGenerateInterLoc(newImplicitTupleSet)) {
5328 // need to create an intermediate node for the GLB of conditional
5329 // locations & implicit flows
5331 NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5332 for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter
5334 NTuple<Descriptor> tuple = idxIter.next();
5335 addFlowGraphEdge(md, tuple, interTuple);
5337 newImplicitTupleSet.clear();
5338 newImplicitTupleSet.addTuple(interTuple);
5343 // System.out.println("condTupleNode="+condTupleNode);
5344 // NTuple<Descriptor> interTuple =
5345 // getFlowGraph(md).createIntermediateNode().getDescTuple();
5347 // for (Iterator<NTuple<Descriptor>> idxIter = condTupleNode.iterator();
5348 // idxIter.hasNext();) {
5349 // NTuple<Descriptor> tuple = idxIter.next();
5350 // addFlowGraphEdge(md, tuple, interTuple);
5353 // for (Iterator<NTuple<Descriptor>> idxIter =
5354 // implicitFlowTupleSet.iterator(); idxIter
5356 // NTuple<Descriptor> tuple = idxIter.next();
5357 // addFlowGraphEdge(md, tuple, interTuple);
5360 // NodeTupleSet newImplicitSet = new NodeTupleSet();
5361 // newImplicitSet.addTuple(interTuple);
5362 analyzeFlowBlockNode(md, nametable, ln.getBody(), newImplicitTupleSet);
5365 // condTupleNode.addTupleSet(implicitFlowTupleSet);
5367 // add edges from condNodeTupleSet to all nodes of conditional nodes
5368 // analyzeFlowBlockNode(md, nametable, ln.getBody(), condTupleNode);
5371 // check 'for loop' case
5372 BlockNode bn = ln.getInitializer();
5373 bn.getVarTable().setParent(nametable);
5374 for (int i = 0; i < bn.size(); i++) {
5375 BlockStatementNode bsn = bn.get(i);
5376 analyzeBlockStatementNode(md, bn.getVarTable(), bsn, implicitFlowTupleSet);
5379 NodeTupleSet condTupleNode = new NodeTupleSet();
5380 analyzeFlowExpressionNode(md, bn.getVarTable(), ln.getCondition(), condTupleNode, null,
5381 implicitFlowTupleSet, false);
5383 NodeTupleSet newImplicitTupleSet = new NodeTupleSet();
5384 newImplicitTupleSet.addTupleSet(implicitFlowTupleSet);
5385 newImplicitTupleSet.addTupleSet(condTupleNode);
5387 if (needToGenerateInterLoc(newImplicitTupleSet)) {
5388 // need to create an intermediate node for the GLB of conditional
5389 // locations & implicit flows
5391 NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5392 for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter
5394 NTuple<Descriptor> tuple = idxIter.next();
5395 addFlowGraphEdge(md, tuple, interTuple);
5397 newImplicitTupleSet.clear();
5398 newImplicitTupleSet.addTuple(interTuple);
5403 // NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5405 // for (Iterator<NTuple<Descriptor>> idxIter = condTupleNode.iterator(); idxIter.hasNext();) {
5406 // NTuple<Descriptor> tuple = idxIter.next();
5407 // addFlowGraphEdge(md, tuple, interTuple);
5410 // for (Iterator<NTuple<Descriptor>> idxIter = implicitFlowTupleSet.iterator(); idxIter
5412 // NTuple<Descriptor> tuple = idxIter.next();
5413 // addFlowGraphEdge(md, tuple, interTuple);
5416 // NodeTupleSet newImplicitSet = new NodeTupleSet();
5417 // newImplicitSet.addTuple(interTuple);
5418 analyzeFlowBlockNode(md, bn.getVarTable(), ln.getUpdate(), newImplicitTupleSet);
5419 analyzeFlowBlockNode(md, bn.getVarTable(), ln.getBody(), newImplicitTupleSet);
5422 // condTupleNode.addTupleSet(implicitFlowTupleSet);
5424 // analyzeFlowBlockNode(md, bn.getVarTable(), ln.getUpdate(),
5426 // analyzeFlowBlockNode(md, bn.getVarTable(), ln.getBody(),
5433 private void analyzeFlowIfStatementNode(MethodDescriptor md, SymbolTable nametable,
5434 IfStatementNode isn, NodeTupleSet implicitFlowTupleSet) {
5436 // System.out.println("analyzeFlowIfStatementNode=" + isn.printNode(0));
5438 NodeTupleSet condTupleNode = new NodeTupleSet();
5439 analyzeFlowExpressionNode(md, nametable, isn.getCondition(), condTupleNode, null,
5440 implicitFlowTupleSet, false);
5442 NodeTupleSet newImplicitTupleSet = new NodeTupleSet();
5444 newImplicitTupleSet.addTupleSet(implicitFlowTupleSet);
5445 newImplicitTupleSet.addTupleSet(condTupleNode);
5447 // System.out.println("$$$GGGcondTupleNode=" + condTupleNode.getGlobalLocTupleSet());
5448 // System.out.println("-condTupleNode=" + condTupleNode);
5449 // System.out.println("-implicitFlowTupleSet=" + implicitFlowTupleSet);
5450 // System.out.println("-newImplicitTupleSet=" + newImplicitTupleSet);
5452 if (needToGenerateInterLoc(newImplicitTupleSet)) {
5454 // need to create an intermediate node for the GLB of conditional locations & implicit flows
5455 NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5456 for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter.hasNext();) {
5457 NTuple<Descriptor> tuple = idxIter.next();
5458 addFlowGraphEdge(md, tuple, interTuple);
5460 newImplicitTupleSet.clear();
5461 newImplicitTupleSet.addTuple(interTuple);
5464 // GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
5465 // for (Iterator<NTuple<Location>> iterator = condTupleNode.globalIterator();
5466 // iterator.hasNext();) {
5467 // NTuple<Location> calleeReturnLocTuple = iterator.next();
5468 // for (Iterator<NTuple<Descriptor>> iter2 = newImplicitTupleSet.iterator(); iter2.hasNext();) {
5469 // NTuple<Descriptor> callerImplicitTuple = iter2.next();
5470 // globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple,
5471 // translateToLocTuple(md, callerImplicitTuple));
5474 newImplicitTupleSet.addGlobalFlowTupleSet(condTupleNode.getGlobalLocTupleSet());
5476 analyzeFlowBlockNode(md, nametable, isn.getTrueBlock(), newImplicitTupleSet);
5478 if (isn.getFalseBlock() != null) {
5479 analyzeFlowBlockNode(md, nametable, isn.getFalseBlock(), newImplicitTupleSet);
5484 private void analyzeFlowDeclarationNode(MethodDescriptor md, SymbolTable nametable,
5485 DeclarationNode dn, NodeTupleSet implicitFlowTupleSet) {
5487 VarDescriptor vd = dn.getVarDescriptor();
5488 mapDescToDefinitionLine.put(vd, dn.getNumLine());
5489 NTuple<Descriptor> tupleLHS = new NTuple<Descriptor>();
5491 FlowNode fn = getFlowGraph(md).createNewFlowNode(tupleLHS);
5492 fn.setDeclarationNode();
5494 if (dn.getExpression() != null) {
5495 // System.out.println("-analyzeFlowDeclarationNode=" + dn.printNode(0));
5497 NodeTupleSet nodeSetRHS = new NodeTupleSet();
5498 analyzeFlowExpressionNode(md, nametable, dn.getExpression(), nodeSetRHS, null,
5499 implicitFlowTupleSet, false);
5501 // creates edges from RHS to LHS
5502 NTuple<Descriptor> interTuple = null;
5503 if (needToGenerateInterLoc(nodeSetRHS)) {
5504 interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5507 for (Iterator<NTuple<Descriptor>> iter = nodeSetRHS.iterator(); iter.hasNext();) {
5508 NTuple<Descriptor> fromTuple = iter.next();
5509 // System.out.println("fromTuple=" + fromTuple + " interTuple=" + interTuple + " tupleLSH="
5511 addFlowGraphEdge(md, fromTuple, interTuple, tupleLHS);
5514 // creates edges from implicitFlowTupleSet to LHS
5515 for (Iterator<NTuple<Descriptor>> iter = implicitFlowTupleSet.iterator(); iter.hasNext();) {
5516 NTuple<Descriptor> implicitTuple = iter.next();
5517 addFlowGraphEdge(md, implicitTuple, tupleLHS);
5520 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
5521 for (Iterator<NTuple<Location>> iterator = nodeSetRHS.globalIterator(); iterator.hasNext();) {
5522 NTuple<Location> calleeReturnLocTuple = iterator.next();
5524 globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple, translateToLocTuple(md, tupleLHS));
5527 for (Iterator<NTuple<Location>> iterator = implicitFlowTupleSet.globalIterator(); iterator
5529 NTuple<Location> implicitGlobalTuple = iterator.next();
5531 globalFlowGraph.addValueFlowEdge(implicitGlobalTuple, translateToLocTuple(md, tupleLHS));
5534 // System.out.println("-nodeSetRHS=" + nodeSetRHS);
5535 // System.out.println("-implicitFlowTupleSet=" + implicitFlowTupleSet);
5541 private void analyzeBlockExpressionNode(MethodDescriptor md, SymbolTable nametable,
5542 BlockExpressionNode ben, NodeTupleSet implicitFlowTupleSet) {
5543 analyzeFlowExpressionNode(md, nametable, ben.getExpression(), null, null, implicitFlowTupleSet,
5547 private NTuple<Descriptor> analyzeFlowExpressionNode(MethodDescriptor md, SymbolTable nametable,
5548 ExpressionNode en, NodeTupleSet nodeSet, boolean isLHS) {
5549 return analyzeFlowExpressionNode(md, nametable, en, nodeSet, null, new NodeTupleSet(), isLHS);
5552 private NTuple<Descriptor> analyzeFlowExpressionNode(MethodDescriptor md, SymbolTable nametable,
5553 ExpressionNode en, NodeTupleSet nodeSet, NTuple<Descriptor> base,
5554 NodeTupleSet implicitFlowTupleSet, boolean isLHS) {
5556 // System.out.println("en=" + en.printNode(0) + " class=" + en.getClass());
5558 // note that expression node can create more than one flow node
5559 // nodeSet contains of flow nodes
5560 // base is always assigned to null except the case of a name node!
5561 NTuple<Descriptor> flowTuple;
5562 switch (en.kind()) {
5563 case Kind.AssignmentNode:
5564 analyzeFlowAssignmentNode(md, nametable, (AssignmentNode) en, nodeSet, base,
5565 implicitFlowTupleSet);
5568 case Kind.FieldAccessNode:
5570 analyzeFlowFieldAccessNode(md, nametable, (FieldAccessNode) en, nodeSet, base,
5571 implicitFlowTupleSet, isLHS);
5572 if (flowTuple != null) {
5573 nodeSet.addTuple(flowTuple);
5578 NodeTupleSet nameNodeSet = new NodeTupleSet();
5580 analyzeFlowNameNode(md, nametable, (NameNode) en, nameNodeSet, base, implicitFlowTupleSet);
5581 if (flowTuple != null) {
5582 nodeSet.addTuple(flowTuple);
5587 analyzeFlowOpNode(md, nametable, (OpNode) en, nodeSet, implicitFlowTupleSet);
5590 case Kind.CreateObjectNode:
5591 analyzeCreateObjectNode(md, nametable, (CreateObjectNode) en, nodeSet, implicitFlowTupleSet);
5594 case Kind.ArrayAccessNode:
5595 analyzeFlowArrayAccessNode(md, nametable, (ArrayAccessNode) en, nodeSet, isLHS);
5598 case Kind.LiteralNode:
5599 analyzeFlowLiteralNode(md, nametable, (LiteralNode) en, nodeSet);
5602 case Kind.MethodInvokeNode:
5603 analyzeFlowMethodInvokeNode(md, nametable, (MethodInvokeNode) en, nodeSet,
5604 implicitFlowTupleSet);
5607 case Kind.TertiaryNode:
5608 analyzeFlowTertiaryNode(md, nametable, (TertiaryNode) en, nodeSet, implicitFlowTupleSet);
5612 analyzeFlowCastNode(md, nametable, (CastNode) en, nodeSet, base, implicitFlowTupleSet);
5614 // case Kind.InstanceOfNode:
5615 // checkInstanceOfNode(md, nametable, (InstanceOfNode) en, td);
5618 // case Kind.ArrayInitializerNode:
5619 // checkArrayInitializerNode(md, nametable, (ArrayInitializerNode) en,
5623 // case Kind.ClassTypeNode:
5624 // checkClassTypeNode(md, nametable, (ClassTypeNode) en, td);
5627 // case Kind.OffsetNode:
5628 // checkOffsetNode(md, nametable, (OffsetNode)en, td);
5637 private void analyzeFlowCastNode(MethodDescriptor md, SymbolTable nametable, CastNode cn,
5638 NodeTupleSet nodeSet, NTuple<Descriptor> base, NodeTupleSet implicitFlowTupleSet) {
5640 analyzeFlowExpressionNode(md, nametable, cn.getExpression(), nodeSet, base,
5641 implicitFlowTupleSet, false);
5645 private void analyzeFlowTertiaryNode(MethodDescriptor md, SymbolTable nametable, TertiaryNode tn,
5646 NodeTupleSet nodeSet, NodeTupleSet implicitFlowTupleSet) {
5648 // System.out.println("analyzeFlowTertiaryNode=" + tn.printNode(0));
5650 NodeTupleSet tertiaryTupleNode = new NodeTupleSet();
5651 analyzeFlowExpressionNode(md, nametable, tn.getCond(), tertiaryTupleNode, null,
5652 implicitFlowTupleSet, false);
5654 NodeTupleSet newImplicitTupleSet = new NodeTupleSet();
5655 newImplicitTupleSet.addTupleSet(implicitFlowTupleSet);
5656 newImplicitTupleSet.addTupleSet(tertiaryTupleNode);
5658 // System.out.println("$$$GGGcondTupleNode=" + tertiaryTupleNode.getGlobalLocTupleSet());
5659 // System.out.println("-tertiaryTupleNode=" + tertiaryTupleNode);
5660 // System.out.println("-implicitFlowTupleSet=" + implicitFlowTupleSet);
5661 // System.out.println("-newImplicitTupleSet=" + newImplicitTupleSet);
5663 if (needToGenerateInterLoc(newImplicitTupleSet)) {
5664 // need to create an intermediate node for the GLB of conditional locations & implicit flows
5665 NTuple<Descriptor> interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
5666 for (Iterator<NTuple<Descriptor>> idxIter = newImplicitTupleSet.iterator(); idxIter.hasNext();) {
5667 NTuple<Descriptor> tuple = idxIter.next();
5668 addFlowGraphEdge(md, tuple, interTuple);
5670 newImplicitTupleSet.clear();
5671 newImplicitTupleSet.addTuple(interTuple);
5674 newImplicitTupleSet.addGlobalFlowTupleSet(tertiaryTupleNode.getGlobalLocTupleSet());
5676 // System.out.println("---------newImplicitTupleSet=" + newImplicitTupleSet);
5678 // add edges from tertiaryTupleNode to all nodes of conditional nodes
5679 // tertiaryTupleNode.addTupleSet(implicitFlowTupleSet);
5680 analyzeFlowExpressionNode(md, nametable, tn.getTrueExpr(), tertiaryTupleNode, null,
5681 newImplicitTupleSet, false);
5683 analyzeFlowExpressionNode(md, nametable, tn.getFalseExpr(), tertiaryTupleNode, null,
5684 newImplicitTupleSet, false);
5686 nodeSet.addGlobalFlowTupleSet(tertiaryTupleNode.getGlobalLocTupleSet());
5687 nodeSet.addTupleSet(tertiaryTupleNode);
5689 // System.out.println("#tertiary node set=" + nodeSet);
5692 private void addMapCallerMethodDescToMethodInvokeNodeSet(MethodDescriptor caller,
5693 MethodInvokeNode min) {
5694 Set<MethodInvokeNode> set = mapMethodDescriptorToMethodInvokeNodeSet.get(caller);
5696 set = new HashSet<MethodInvokeNode>();
5697 mapMethodDescriptorToMethodInvokeNodeSet.put(caller, set);
5702 private void addParamNodeFlowingToReturnValue(MethodDescriptor md, FlowNode fn) {
5704 if (!mapMethodDescToParamNodeFlowsToReturnValue.containsKey(md)) {
5705 mapMethodDescToParamNodeFlowsToReturnValue.put(md, new HashSet<FlowNode>());
5707 mapMethodDescToParamNodeFlowsToReturnValue.get(md).add(fn);
5710 private Set<FlowNode> getParamNodeFlowingToReturnValue(MethodDescriptor md) {
5712 if (!mapMethodDescToParamNodeFlowsToReturnValue.containsKey(md)) {
5713 mapMethodDescToParamNodeFlowsToReturnValue.put(md, new HashSet<FlowNode>());
5716 return mapMethodDescToParamNodeFlowsToReturnValue.get(md);
5719 private Set<NTuple<Location>> getPCLocTupleSet(MethodInvokeNode min) {
5720 if (!mapMethodInvokeNodeToPCLocTupleSet.containsKey(min)) {
5721 mapMethodInvokeNodeToPCLocTupleSet.put(min, new HashSet<NTuple<Location>>());
5723 return mapMethodInvokeNodeToPCLocTupleSet.get(min);
5726 private void analyzeFlowMethodInvokeNode(MethodDescriptor mdCaller, SymbolTable nametable,
5727 MethodInvokeNode min, NodeTupleSet nodeSet, NodeTupleSet implicitFlowTupleSet) {
5729 // System.out.println("analyzeFlowMethodInvokeNode=" + min.printNode(0));
5731 if (!toanalyze_methodDescList.contains(min.getMethod())) {
5735 addMapMethodDescToMethodInvokeNodeSet(min);
5737 Set<NTuple<Location>> pcLocTupleSet = getPCLocTupleSet(min);
5738 for (Iterator iterator = implicitFlowTupleSet.iterator(); iterator.hasNext();) {
5739 NTuple<Descriptor> pcDescTuple = (NTuple<Descriptor>) iterator.next();
5740 if (!pcDescTuple.get(0).equals(LITERALDESC)) {
5741 // here we don't need to add the literal value as a PC location
5742 pcLocTupleSet.add(translateToLocTuple(mdCaller, pcDescTuple));
5746 mapMethodInvokeNodeToArgIdxMap.put(min, new HashMap<Integer, NTuple<Descriptor>>());
5748 if (nodeSet == null) {
5749 nodeSet = new NodeTupleSet();
5752 MethodDescriptor mdCallee = min.getMethod();
5754 NameDescriptor baseName = min.getBaseName();
5755 boolean isSystemout = false;
5756 if (baseName != null) {
5757 isSystemout = baseName.getSymbol().equals("System.out");
5760 if (!ssjava.isSSJavaUtil(mdCallee.getClassDesc()) && !ssjava.isTrustMethod(mdCallee)
5763 addMapCallerMethodDescToMethodInvokeNodeSet(mdCaller, min);
5765 FlowGraph calleeFlowGraph = getFlowGraph(mdCallee);
5766 // System.out.println("mdCallee=" + mdCallee + " calleeFlowGraph=" + calleeFlowGraph);
5767 Set<FlowNode> calleeReturnSet = calleeFlowGraph.getReturnNodeSet();
5769 // System.out.println("---calleeReturnSet=" + calleeReturnSet);
5771 NodeTupleSet tupleSet = new NodeTupleSet();
5773 if (min.getExpression() != null) {
5775 NodeTupleSet baseNodeSet = new NodeTupleSet();
5776 analyzeFlowExpressionNode(mdCaller, nametable, min.getExpression(), baseNodeSet, null,
5777 implicitFlowTupleSet, false);
5778 // System.out.println("baseNodeSet=" + baseNodeSet);
5780 assert (baseNodeSet.size() == 1);
5781 NTuple<Descriptor> baseTuple = baseNodeSet.iterator().next();
5782 if (baseTuple.get(0) instanceof InterDescriptor) {
5783 if (baseTuple.size() > 1) {
5786 FlowNode interNode = getFlowGraph(mdCaller).getFlowNode(baseTuple);
5787 baseTuple = translateBaseTuple(interNode, baseTuple);
5789 mapMethodInvokeNodeToBaseTuple.put(min, baseTuple);
5791 if (!min.getMethod().isStatic()) {
5792 addArgIdxMap(min, 0, baseTuple);
5794 for (Iterator iterator = calleeReturnSet.iterator(); iterator.hasNext();) {
5795 FlowNode returnNode = (FlowNode) iterator.next();
5796 NTuple<Descriptor> returnDescTuple = returnNode.getDescTuple();
5797 if (returnDescTuple.startsWith(mdCallee.getThis())) {
5798 // the location type of the return value is started with 'this'
5800 NTuple<Descriptor> inFlowTuple = new NTuple<Descriptor>(baseTuple.getList());
5802 if (inFlowTuple.get(0) instanceof InterDescriptor) {
5803 // min.getExpression()
5808 inFlowTuple.addAll(returnDescTuple.subList(1, returnDescTuple.size()));
5809 // nodeSet.addTuple(inFlowTuple);
5810 // System.out.println("1CREATE A NEW TUPLE=" + inFlowTuple + " from="
5811 // + mdCallee.getThis());
5812 // tupleSet.addTuple(inFlowTuple);
5813 tupleSet.addTuple(baseTuple);
5816 // System.out.println("returnNode=" + returnNode);
5817 Set<FlowNode> inFlowSet = calleeFlowGraph.getIncomingFlowNodeSet(returnNode);
5818 // System.out.println("inFlowSet=" + inFlowSet + " from retrunNode=" + returnNode);
5819 for (Iterator iterator2 = inFlowSet.iterator(); iterator2.hasNext();) {
5820 FlowNode inFlowNode = (FlowNode) iterator2.next();
5821 if (inFlowNode.getDescTuple().startsWith(mdCallee.getThis())) {
5822 // nodeSet.addTupleSet(baseNodeSet);
5823 // System.out.println("2CREATE A NEW TUPLE=" + baseNodeSet + " from="
5824 // + mdCallee.getThis());
5825 tupleSet.addTupleSet(baseNodeSet);
5833 // analyze parameter flows
5835 if (min.numArgs() > 0) {
5838 if (min.getMethod().isStatic()) {
5844 for (int i = 0; i < min.numArgs(); i++) {
5845 ExpressionNode en = min.getArg(i);
5846 int idx = i + offset;
5847 NodeTupleSet argTupleSet = new NodeTupleSet();
5848 analyzeFlowExpressionNode(mdCaller, nametable, en, argTupleSet, false);
5849 // if argument is liternal node, argTuple is set to NULL
5850 // System.out.println("---arg idx=" + idx + " argTupleSet=" + argTupleSet);
5851 NTuple<Descriptor> argTuple = generateArgTuple(mdCaller, argTupleSet);
5853 // if an argument is literal value,
5854 // we need to create an itermediate node so that we could assign a composite location to
5855 // that node if needed
5856 if (argTuple.size() > 0
5857 && (argTuple.get(0).equals(GLOBALDESC) || argTuple.get(0).equals(LITERALDESC))) {
5859 * System.out.println("***GLOBAL ARG TUPLE CASE=" + argTuple); System.out.println("8");
5861 * NTuple<Descriptor> interTuple =
5862 * getFlowGraph(mdCaller).createIntermediateNode().getDescTuple(); ((InterDescriptor)
5863 * interTuple.get(0)).setMethodArgIdxPair(min, idx); addFlowGraphEdge(mdCaller,
5864 * argTuple, interTuple); argTuple = interTuple; addArgIdxMap(min, idx, argTuple);
5865 * System.out.println("new min mapping i=" + idx + " ->" + argTuple);
5867 argTuple = new NTuple<Descriptor>();
5870 addArgIdxMap(min, idx, argTuple);
5872 FlowNode paramNode = calleeFlowGraph.getParamFlowNode(idx);
5874 // check whether a param node in the callee graph has incoming flows
5875 // if it has incoming flows, the corresponding arg should be lower than the current PC
5876 // Descriptor prefix = paramNode.getDescTuple().get(0);
5877 // if (calleeFlowGraph.getIncomingNodeSetByPrefix(prefix).size() > 0) {
5878 // for (Iterator<NTuple<Descriptor>> iterator = implicitFlowTupleSet.iterator(); iterator
5880 // NTuple<Descriptor> pcTuple = iterator.next();
5881 // System.out.println("add edge pcTuple =" + pcTuple + " -> " + argTuple);
5882 // addFlowGraphEdge(md, pcTuple, argTuple);
5886 // System.out.println("paramNode=" + paramNode + " calleeReturnSet=" + calleeReturnSet);
5887 if (hasInFlowTo(calleeFlowGraph, paramNode, calleeReturnSet)
5888 || mdCallee.getModifiers().isNative()) {
5889 addParamNodeFlowingToReturnValue(mdCallee, paramNode);
5890 // nodeSet.addTupleSet(argTupleSet);
5891 // System.out.println("3CREATE A NEW TUPLE=" + argTupleSet + " from=" + paramNode);
5892 tupleSet.addTupleSet(argTupleSet);
5898 if (mdCallee.getReturnType() != null && !mdCallee.getReturnType().isVoid()) {
5899 FlowReturnNode returnHolderNode = getFlowGraph(mdCaller).createReturnNode(min);
5901 if (needToGenerateInterLoc(tupleSet)) {
5902 FlowGraph fg = getFlowGraph(mdCaller);
5903 FlowNode interNode = fg.createIntermediateNode();
5904 interNode.setFormHolder(true);
5906 NTuple<Descriptor> interTuple = interNode.getDescTuple();
5908 for (Iterator iterator = tupleSet.iterator(); iterator.hasNext();) {
5909 NTuple<Descriptor> tuple = (NTuple<Descriptor>) iterator.next();
5911 Set<NTuple<Descriptor>> addSet = new HashSet<NTuple<Descriptor>>();
5912 FlowNode node = fg.getFlowNode(tuple);
5913 if (node instanceof FlowReturnNode) {
5914 addSet.addAll(fg.getReturnTupleSet(((FlowReturnNode) node).getReturnTupleSet()));
5918 for (Iterator iterator2 = addSet.iterator(); iterator2.hasNext();) {
5919 NTuple<Descriptor> higher = (NTuple<Descriptor>) iterator2.next();
5920 addFlowGraphEdge(mdCaller, higher, interTuple);
5924 returnHolderNode.addTuple(interTuple);
5926 nodeSet.addTuple(interTuple);
5927 // System.out.println("ADD TUPLESET=" + interTuple + " to returnnode=" +
5928 // returnHolderNode);
5931 returnHolderNode.addTupleSet(tupleSet);
5932 // System.out.println("ADD TUPLESET=" + tupleSet + " to returnnode=" + returnHolderNode);
5934 // setNode.addTupleSet(tupleSet);
5935 // NodeTupleSet setFromReturnNode=new NodeTupleSet();
5936 // setFromReturnNode.addTuple(tuple);
5938 NodeTupleSet holderTupleSet =
5939 getNodeTupleSetFromReturnNode(getFlowGraph(mdCaller), returnHolderNode);
5941 // System.out.println("HOLDER TUPLE SET=" + holderTupleSet);
5942 nodeSet.addTupleSet(holderTupleSet);
5944 nodeSet.addTuple(returnHolderNode.getDescTuple());
5947 // propagateFlowsFromCallee(min, md, min.getMethod());
5949 // when generating the global flow graph,
5950 // we need to add ordering relations from the set of callee return loc tuple to LHS of the
5951 // caller assignment
5952 for (Iterator iterator = calleeReturnSet.iterator(); iterator.hasNext();) {
5953 FlowNode calleeReturnNode = (FlowNode) iterator.next();
5954 NTuple<Location> calleeReturnLocTuple =
5955 translateToLocTuple(mdCallee, calleeReturnNode.getDescTuple());
5956 // System.out.println("calleeReturnLocTuple=" + calleeReturnLocTuple);
5957 NTuple<Location> transaltedToCaller =
5958 translateToCallerLocTuple(min, mdCallee, mdCaller, calleeReturnLocTuple);
5959 // System.out.println("translateToCallerLocTuple="
5960 // + translateToCallerLocTuple(min, mdCallee, mdCaller, calleeReturnLocTuple));
5961 if (transaltedToCaller.size() > 0) {
5962 nodeSet.addGlobalFlowTuple(translateToCallerLocTuple(min, mdCallee, mdCaller,
5963 calleeReturnLocTuple));
5967 // System.out.println("min nodeSet=" + nodeSet);
5973 private NodeTupleSet getNodeTupleSetFromReturnNode(FlowGraph fg, FlowReturnNode node) {
5974 NodeTupleSet nts = new NodeTupleSet();
5976 Set<NTuple<Descriptor>> returnSet = node.getReturnTupleSet();
5978 for (Iterator iterator = returnSet.iterator(); iterator.hasNext();) {
5979 NTuple<Descriptor> tuple = (NTuple<Descriptor>) iterator.next();
5980 FlowNode flowNode = fg.getFlowNode(tuple);
5981 if (flowNode instanceof FlowReturnNode) {
5982 returnSet.addAll(recurGetNode(fg, (FlowReturnNode) flowNode));
5984 returnSet.add(tuple);
5988 for (Iterator iterator = returnSet.iterator(); iterator.hasNext();) {
5989 NTuple<Descriptor> nTuple = (NTuple<Descriptor>) iterator.next();
5990 nts.addTuple(nTuple);
5997 private Set<NTuple<Descriptor>> recurGetNode(FlowGraph fg, FlowReturnNode rnode) {
5999 Set<NTuple<Descriptor>> tupleSet = new HashSet<NTuple<Descriptor>>();
6001 Set<NTuple<Descriptor>> returnSet = rnode.getReturnTupleSet();
6002 for (Iterator iterator = returnSet.iterator(); iterator.hasNext();) {
6003 NTuple<Descriptor> tuple = (NTuple<Descriptor>) iterator.next();
6004 FlowNode flowNode = fg.getFlowNode(tuple);
6005 if (flowNode instanceof FlowReturnNode) {
6006 tupleSet.addAll(recurGetNode(fg, (FlowReturnNode) flowNode));
6008 tupleSet.add(tuple);
6014 private NTuple<Descriptor> generateArgTuple(MethodDescriptor mdCaller, NodeTupleSet argTupleSet) {
6018 // if argTupleSet is empty, it comes from the top location
6019 if (argTupleSet.size() == 0) {
6020 NTuple<Descriptor> descTuple = new NTuple<Descriptor>();
6021 descTuple.add(LITERALDESC);
6025 Set<NTuple<Descriptor>> argTupleSetNonLiteral = new HashSet<NTuple<Descriptor>>();
6027 for (Iterator<NTuple<Descriptor>> iter = argTupleSet.iterator(); iter.hasNext();) {
6028 NTuple<Descriptor> descTuple = iter.next();
6029 if (!descTuple.get(0).equals(LITERALDESC)) {
6030 argTupleSetNonLiteral.add(descTuple);
6034 if (argTupleSetNonLiteral.size() > 1) {
6036 NTuple<Descriptor> interTuple =
6037 getFlowGraph(mdCaller).createIntermediateNode().getDescTuple();
6038 for (Iterator<NTuple<Descriptor>> idxIter = argTupleSet.iterator(); idxIter.hasNext();) {
6039 NTuple<Descriptor> tuple = idxIter.next();
6040 addFlowGraphEdge(mdCaller, tuple, interTuple);
6043 } else if (argTupleSetNonLiteral.size() == 1) {
6044 return argTupleSetNonLiteral.iterator().next();
6046 return argTupleSet.iterator().next();
6051 private boolean hasInFlowTo(FlowGraph fg, FlowNode inNode, Set<FlowNode> nodeSet) {
6052 // return true if inNode has in-flows to nodeSet
6054 if (nodeSet.contains(inNode)) {
6055 // in this case, the method directly returns a parameter variable.
6058 // Set<FlowNode> reachableSet = fg.getReachFlowNodeSetFrom(inNode);
6059 Set<FlowNode> reachableSet = fg.getReachableSetFrom(inNode.getDescTuple());
6060 // System.out.println("inNode=" + inNode + " reachalbeSet=" + reachableSet);
6062 for (Iterator iterator = reachableSet.iterator(); iterator.hasNext();) {
6063 FlowNode fn = (FlowNode) iterator.next();
6064 if (nodeSet.contains(fn)) {
6071 private NTuple<Descriptor> getNodeTupleByArgIdx(MethodInvokeNode min, int idx) {
6072 return mapMethodInvokeNodeToArgIdxMap.get(min).get(new Integer(idx));
6075 private void addArgIdxMap(MethodInvokeNode min, int idx, NTuple<Descriptor> argTuple /*
6079 Map<Integer, NTuple<Descriptor>> mapIdxToTuple = mapMethodInvokeNodeToArgIdxMap.get(min);
6080 if (mapIdxToTuple == null) {
6081 mapIdxToTuple = new HashMap<Integer, NTuple<Descriptor>>();
6082 mapMethodInvokeNodeToArgIdxMap.put(min, mapIdxToTuple);
6084 mapIdxToTuple.put(new Integer(idx), argTuple);
6087 private void analyzeFlowLiteralNode(MethodDescriptor md, SymbolTable nametable, LiteralNode en,
6088 NodeTupleSet nodeSet) {
6089 NTuple<Descriptor> tuple = new NTuple<Descriptor>();
6090 tuple.add(LITERALDESC);
6091 nodeSet.addTuple(tuple);
6094 private void analyzeFlowArrayAccessNode(MethodDescriptor md, SymbolTable nametable,
6095 ArrayAccessNode aan, NodeTupleSet nodeSet, boolean isLHS) {
6097 // System.out.println("analyzeFlowArrayAccessNode aan=" + aan.printNode(0));
6098 String currentArrayAccessNodeExpStr = aan.printNode(0);
6099 arrayAccessNodeStack.push(aan.printNode(0));
6101 NodeTupleSet expNodeTupleSet = new NodeTupleSet();
6102 NTuple<Descriptor> base =
6103 analyzeFlowExpressionNode(md, nametable, aan.getExpression(), expNodeTupleSet, isLHS);
6104 // System.out.println("-base=" + base);
6106 nodeSet.setMethodInvokeBaseDescTuple(base);
6107 NodeTupleSet idxNodeTupleSet = new NodeTupleSet();
6108 analyzeFlowExpressionNode(md, nametable, aan.getIndex(), idxNodeTupleSet, isLHS);
6110 arrayAccessNodeStack.pop();
6113 // need to create an edge from idx to array
6114 for (Iterator<NTuple<Descriptor>> idxIter = idxNodeTupleSet.iterator(); idxIter.hasNext();) {
6115 NTuple<Descriptor> idxTuple = idxIter.next();
6116 for (Iterator<NTuple<Descriptor>> arrIter = expNodeTupleSet.iterator(); arrIter.hasNext();) {
6117 NTuple<Descriptor> arrTuple = arrIter.next();
6118 getFlowGraph(md).addValueFlowEdge(idxTuple, arrTuple);
6122 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
6123 for (Iterator<NTuple<Location>> iterator = idxNodeTupleSet.globalIterator(); iterator
6125 NTuple<Location> calleeReturnLocTuple = iterator.next();
6126 for (Iterator<NTuple<Descriptor>> arrIter = expNodeTupleSet.iterator(); arrIter.hasNext();) {
6127 NTuple<Descriptor> arrTuple = arrIter.next();
6129 globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple, translateToLocTuple(md, arrTuple));
6133 nodeSet.addTupleSet(expNodeTupleSet);
6136 NodeTupleSet nodeSetArrayAccessExp = new NodeTupleSet();
6138 nodeSetArrayAccessExp.addTupleSet(expNodeTupleSet);
6139 nodeSetArrayAccessExp.addTupleSet(idxNodeTupleSet);
6141 if (arrayAccessNodeStack.isEmpty()
6142 || !arrayAccessNodeStack.peek().startsWith(currentArrayAccessNodeExpStr)) {
6144 if (needToGenerateInterLoc(nodeSetArrayAccessExp)) {
6145 FlowNode interNode = getFlowGraph(md).createIntermediateNode();
6146 NTuple<Descriptor> interTuple = interNode.getDescTuple();
6148 for (Iterator<NTuple<Descriptor>> iter = nodeSetArrayAccessExp.iterator(); iter.hasNext();) {
6149 NTuple<Descriptor> higherTuple = iter.next();
6150 addFlowGraphEdge(md, higherTuple, interTuple);
6152 nodeSetArrayAccessExp.clear();
6153 nodeSetArrayAccessExp.addTuple(interTuple);
6154 FlowGraph fg = getFlowGraph(md);
6156 // System.out.println("base=" + base);
6158 fg.addMapInterLocNodeToEnclosingDescriptor(interTuple.get(0),
6159 getClassTypeDescriptor(base.get(base.size() - 1)));
6160 interNode.setBaseTuple(base);
6165 nodeSet.addGlobalFlowTupleSet(idxNodeTupleSet.getGlobalLocTupleSet());
6166 nodeSet.addTupleSet(nodeSetArrayAccessExp);
6172 private void analyzeCreateObjectNode(MethodDescriptor md, SymbolTable nametable,
6173 CreateObjectNode en, NodeTupleSet nodeSet, NodeTupleSet implicitFlowTupleSet) {
6174 // System.out.println("#analyzeCreateObjectNode=" + en.printNode(0));
6175 int numArgs = en.numArgs();
6176 NodeTupleSet argSet = new NodeTupleSet();
6178 for (int i = 0; i < numArgs; i++) {
6179 analyzeFlowExpressionNode(md, nametable, en.getArg(i), argSet, null, implicitFlowTupleSet,
6183 // System.out.println("###argSet=" + argSet);
6184 nodeSet.addTupleSet(argSet);
6188 private void analyzeFlowOpNode(MethodDescriptor md, SymbolTable nametable, OpNode on,
6189 NodeTupleSet nodeSet, NodeTupleSet implicitFlowTupleSet) {
6191 NodeTupleSet leftOpSet = new NodeTupleSet();
6192 NodeTupleSet rightOpSet = new NodeTupleSet();
6194 // System.out.println("analyzeFlowOpNode=" + on.printNode(0));
6197 analyzeFlowExpressionNode(md, nametable, on.getLeft(), leftOpSet, null, implicitFlowTupleSet,
6200 if (on.getRight() != null) {
6202 analyzeFlowExpressionNode(md, nametable, on.getRight(), rightOpSet, null,
6203 implicitFlowTupleSet, false);
6206 Operation op = on.getOp();
6208 switch (op.getOp()) {
6210 case Operation.UNARYPLUS:
6211 case Operation.UNARYMINUS:
6212 case Operation.LOGIC_NOT:
6214 nodeSet.addTupleSet(leftOpSet);
6217 case Operation.LOGIC_OR:
6218 case Operation.LOGIC_AND:
6219 case Operation.COMP:
6220 case Operation.BIT_OR:
6221 case Operation.BIT_XOR:
6222 case Operation.BIT_AND:
6223 case Operation.ISAVAILABLE:
6224 case Operation.EQUAL:
6225 case Operation.NOTEQUAL:
6232 case Operation.MULT:
6235 case Operation.LEFTSHIFT:
6236 case Operation.RIGHTSHIFT:
6237 case Operation.URIGHTSHIFT:
6239 // there are two operands
6240 nodeSet.addTupleSet(leftOpSet);
6241 nodeSet.addTupleSet(rightOpSet);
6243 nodeSet.addGlobalFlowTupleSet(leftOpSet.getGlobalLocTupleSet());
6244 nodeSet.addGlobalFlowTupleSet(rightOpSet.getGlobalLocTupleSet());
6249 throw new Error(op.toString());
6254 private NTuple<Descriptor> analyzeFlowNameNode(MethodDescriptor md, SymbolTable nametable,
6255 NameNode nn, NodeTupleSet nodeSet, NTuple<Descriptor> base, NodeTupleSet implicitFlowTupleSet) {
6258 base = new NTuple<Descriptor>();
6261 NameDescriptor nd = nn.getName();
6263 if (nd.getBase() != null) {
6265 analyzeFlowExpressionNode(md, nametable, nn.getExpression(), nodeSet, base,
6266 implicitFlowTupleSet, false);
6268 // base node has the top location
6272 String varname = nd.toString();
6273 if (varname.equals("this")) {
6275 base.add(md.getThis());
6279 Descriptor d = (Descriptor) nametable.get(varname);
6281 if (d instanceof VarDescriptor) {
6282 VarDescriptor vd = (VarDescriptor) d;
6284 } else if (d instanceof FieldDescriptor) {
6285 // the type of field descriptor has a location!
6286 FieldDescriptor fd = (FieldDescriptor) d;
6287 if (fd.isStatic()) {
6289 // if it is 'static final', no need to have flow node for the TOP
6293 // if 'static', assign the default GLOBAL LOCATION to the first
6294 // element of the tuple
6295 base.add(GLOBALDESC);
6298 // the location of field access starts from this, followed by field
6300 base.add(md.getThis());
6304 } else if (d == null) {
6305 // access static field
6306 base.add(GLOBALDESC);
6307 base.add(nn.getField());
6310 // FieldDescriptor fd = nn.getField();addFlowGraphEdge
6312 // MethodLattice<String> localLattice = ssjava.getMethodLattice(md);
6313 // String globalLocId = localLattice.getGlobalLoc();
6314 // if (globalLocId == null) {
6316 // Error("Method lattice does not define global variable location at "
6317 // + generateErrorMessage(md.getClassDesc(), nn));
6319 // loc.addLocation(new Location(md, globalLocId));
6321 // Location fieldLoc = (Location) fd.getType().getExtension();
6322 // loc.addLocation(fieldLoc);
6328 getFlowGraph(md).createNewFlowNode(base);
6334 private NTuple<Descriptor> analyzeFlowFieldAccessNode(MethodDescriptor md, SymbolTable nametable,
6335 FieldAccessNode fan, NodeTupleSet nodeSet, NTuple<Descriptor> base,
6336 NodeTupleSet implicitFlowTupleSet, boolean isLHS) {
6337 // System.out.println("analyzeFlowFieldAccessNode=" + fan.printNode(0));
6339 String currentArrayAccessNodeExpStr = null;
6340 ExpressionNode left = fan.getExpression();
6341 TypeDescriptor ltd = left.getType();
6342 FieldDescriptor fd = fan.getField();
6343 ArrayAccessNode aan = null;
6345 String varName = null;
6346 if (left.kind() == Kind.NameNode) {
6347 NameDescriptor nd = ((NameNode) left).getName();
6348 varName = nd.toString();
6351 if (ltd.isClassNameRef() || (varName != null && varName.equals("this"))) {
6352 // using a class name directly or access using this
6353 if (fd.isStatic() && fd.isFinal()) {
6358 NodeTupleSet idxNodeTupleSet = new NodeTupleSet();
6360 boolean isArrayCase = false;
6361 if (left instanceof ArrayAccessNode) {
6364 aan = (ArrayAccessNode) left;
6366 currentArrayAccessNodeExpStr = aan.printNode(0);
6367 arrayAccessNodeStack.push(currentArrayAccessNodeExpStr);
6369 left = aan.getExpression();
6370 analyzeFlowExpressionNode(md, nametable, aan.getIndex(), idxNodeTupleSet, base,
6371 implicitFlowTupleSet, isLHS);
6375 analyzeFlowExpressionNode(md, nametable, left, nodeSet, base, implicitFlowTupleSet, isLHS);
6378 // in this case, field is TOP location
6382 NTuple<Descriptor> flowFieldTuple = new NTuple<Descriptor>(base.toList());
6384 if (!left.getType().isPrimitive()) {
6385 if (!fd.getSymbol().equals("length")) {
6386 // array.length access, just have the location of the array
6387 flowFieldTuple.add(fd);
6388 nodeSet.removeTuple(base);
6391 getFlowGraph(md).createNewFlowNode(flowFieldTuple);
6394 for (Iterator<NTuple<Descriptor>> idxIter = idxNodeTupleSet.iterator(); idxIter.hasNext();) {
6395 NTuple<Descriptor> idxTuple = idxIter.next();
6396 getFlowGraph(md).addValueFlowEdge(idxTuple, flowFieldTuple);
6399 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
6400 for (Iterator<NTuple<Location>> iterator = idxNodeTupleSet.globalIterator(); iterator
6402 NTuple<Location> calleeReturnLocTuple = iterator.next();
6404 globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple,
6405 translateToLocTuple(md, flowFieldTuple));
6409 nodeSet.addTupleSet(idxNodeTupleSet);
6411 // if it is the array case and not the LHS case
6413 arrayAccessNodeStack.pop();
6415 if (arrayAccessNodeStack.isEmpty()
6416 || !arrayAccessNodeStack.peek().startsWith(currentArrayAccessNodeExpStr)) {
6417 NodeTupleSet nodeSetArrayAccessExp = new NodeTupleSet();
6419 nodeSetArrayAccessExp.addTuple(flowFieldTuple);
6420 nodeSetArrayAccessExp.addTupleSet(idxNodeTupleSet);
6421 nodeSetArrayAccessExp.addTupleSet(nodeSet);
6423 if (needToGenerateInterLoc(nodeSetArrayAccessExp)) {
6424 // System.out.println("nodeSetArrayAccessExp=" + nodeSetArrayAccessExp);
6425 // System.out.println("idxNodeTupleSet.getGlobalLocTupleSet()="
6426 // + idxNodeTupleSet.getGlobalLocTupleSet());
6428 NTuple<Descriptor> interTuple =
6429 getFlowGraph(md).createIntermediateNode().getDescTuple();
6431 for (Iterator<NTuple<Descriptor>> iter = nodeSetArrayAccessExp.iterator(); iter
6433 NTuple<Descriptor> higherTuple = iter.next();
6434 addFlowGraphEdge(md, higherTuple, interTuple);
6437 FlowGraph fg = getFlowGraph(md);
6438 fg.addMapInterLocNodeToEnclosingDescriptor(interTuple.get(0),
6439 getClassTypeDescriptor(base.get(base.size() - 1)));
6442 flowFieldTuple = interTuple;
6444 nodeSet.addGlobalFlowTupleSet(idxNodeTupleSet.getGlobalLocTupleSet());
6450 return flowFieldTuple;
6455 private void debug_printTreeNode(TreeNode tn) {
6457 System.out.println("DEBUG: " + tn.printNode(0) + " line#=" + tn.getNumLine());
6461 private void analyzeFlowAssignmentNode(MethodDescriptor md, SymbolTable nametable,
6462 AssignmentNode an, NodeTupleSet nodeSet, NTuple<Descriptor> base,
6463 NodeTupleSet implicitFlowTupleSet) {
6465 NodeTupleSet nodeSetRHS = new NodeTupleSet();
6466 NodeTupleSet nodeSetLHS = new NodeTupleSet();
6468 boolean postinc = true;
6469 if (an.getOperation().getBaseOp() == null
6470 || (an.getOperation().getBaseOp().getOp() != Operation.POSTINC && an.getOperation()
6471 .getBaseOp().getOp() != Operation.POSTDEC)) {
6474 // if LHS is array access node, need to capture value flows between an array
6475 // and its index value
6476 analyzeFlowExpressionNode(md, nametable, an.getDest(), nodeSetLHS, null, implicitFlowTupleSet,
6480 // analyze value flows of rhs expression
6481 analyzeFlowExpressionNode(md, nametable, an.getSrc(), nodeSetRHS, null, implicitFlowTupleSet,
6484 // System.out.println("-analyzeFlowAssignmentNode=" + an.printNode(0));
6485 // System.out.println("-nodeSetLHS=" + nodeSetLHS);
6486 // System.out.println("-nodeSetRHS=" + nodeSetRHS);
6487 // System.out.println("-implicitFlowTupleSet=" + implicitFlowTupleSet);
6488 // System.out.println("-");
6490 if (an.getOperation().getOp() >= 2 && an.getOperation().getOp() <= 12) {
6491 // if assignment contains OP+EQ operator, creates edges from LHS to LHS
6493 for (Iterator<NTuple<Descriptor>> iter = nodeSetLHS.iterator(); iter.hasNext();) {
6494 NTuple<Descriptor> fromTuple = iter.next();
6495 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6496 NTuple<Descriptor> toTuple = iter2.next();
6497 addFlowGraphEdge(md, fromTuple, toTuple);
6502 // creates edges from RHS to LHS
6503 NTuple<Descriptor> interTuple = null;
6504 if (needToGenerateInterLoc(nodeSetRHS)) {
6505 interTuple = getFlowGraph(md).createIntermediateNode().getDescTuple();
6508 for (Iterator<NTuple<Descriptor>> iter = nodeSetRHS.iterator(); iter.hasNext();) {
6509 NTuple<Descriptor> fromTuple = iter.next();
6510 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6511 NTuple<Descriptor> toTuple = iter2.next();
6512 addFlowGraphEdge(md, fromTuple, interTuple, toTuple);
6516 // creates edges from implicitFlowTupleSet to LHS
6517 for (Iterator<NTuple<Descriptor>> iter = implicitFlowTupleSet.iterator(); iter.hasNext();) {
6518 NTuple<Descriptor> fromTuple = iter.next();
6519 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6520 NTuple<Descriptor> toTuple = iter2.next();
6521 addFlowGraphEdge(md, fromTuple, toTuple);
6525 // create global flow edges if the callee gives return value flows to the caller
6526 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
6527 for (Iterator<NTuple<Location>> iterator = nodeSetRHS.globalIterator(); iterator.hasNext();) {
6528 NTuple<Location> calleeReturnLocTuple = iterator.next();
6529 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6530 NTuple<Descriptor> callerLHSTuple = iter2.next();
6531 // System.out.println("$$$ GLOBAL FLOW ADD=" + calleeReturnLocTuple + " -> "
6532 // + translateToLocTuple(md, callerLHSTuple));
6534 globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple,
6535 translateToLocTuple(md, callerLHSTuple));
6539 for (Iterator<NTuple<Location>> iterator = implicitFlowTupleSet.globalIterator(); iterator
6541 NTuple<Location> calleeReturnLocTuple = iterator.next();
6542 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6543 NTuple<Descriptor> callerLHSTuple = iter2.next();
6545 globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple,
6546 translateToLocTuple(md, callerLHSTuple));
6547 // System.out.println("$$$ GLOBAL FLOW PCLOC ADD=" + calleeReturnLocTuple + " -> "
6548 // + translateToLocTuple(md, callerLHSTuple));
6555 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6556 NTuple<Descriptor> tuple = iter2.next();
6557 addFlowGraphEdge(md, tuple, tuple);
6560 // creates edges from implicitFlowTupleSet to LHS
6561 for (Iterator<NTuple<Descriptor>> iter = implicitFlowTupleSet.iterator(); iter.hasNext();) {
6562 NTuple<Descriptor> fromTuple = iter.next();
6563 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6564 NTuple<Descriptor> toTuple = iter2.next();
6565 addFlowGraphEdge(md, fromTuple, toTuple);
6569 GlobalFlowGraph globalFlowGraph = getSubGlobalFlowGraph(md);
6570 for (Iterator<NTuple<Location>> iterator = implicitFlowTupleSet.globalIterator(); iterator
6572 NTuple<Location> calleeReturnLocTuple = iterator.next();
6573 for (Iterator<NTuple<Descriptor>> iter2 = nodeSetLHS.iterator(); iter2.hasNext();) {
6574 NTuple<Descriptor> callerLHSTuple = iter2.next();
6575 globalFlowGraph.addValueFlowEdge(calleeReturnLocTuple,
6576 translateToLocTuple(md, callerLHSTuple));
6577 // System.out.println("$$$ GLOBAL FLOW PC ADD=" + calleeReturnLocTuple + " -> "
6578 // + translateToLocTuple(md, callerLHSTuple));
6584 if (nodeSet != null) {
6585 nodeSet.addTupleSet(nodeSetLHS);
6586 nodeSet.addGlobalFlowTupleSet(nodeSetLHS.getGlobalLocTupleSet());
6590 public FlowGraph getFlowGraph(MethodDescriptor md) {
6591 return mapMethodDescriptorToFlowGraph.get(md);
6594 private boolean addFlowGraphEdge(MethodDescriptor md, NTuple<Descriptor> from,
6595 NTuple<Descriptor> to) {
6596 FlowGraph graph = getFlowGraph(md);
6597 graph.addValueFlowEdge(from, to);
6601 private void addFlowGraphEdge(MethodDescriptor md, NTuple<Descriptor> from,
6602 NTuple<Descriptor> inter, NTuple<Descriptor> to) {
6604 FlowGraph graph = getFlowGraph(md);
6606 if (inter != null) {
6607 graph.addValueFlowEdge(from, inter);
6608 graph.addValueFlowEdge(inter, to);
6610 graph.addValueFlowEdge(from, to);
6615 public void writeInferredLatticeDotFile(ClassDescriptor cd, SSJavaLattice<String> locOrder,
6616 String nameSuffix) {
6617 // System.out.println("@cd=" + cd);
6618 // System.out.println("@sharedLoc=" + locOrder.getSharedLocSet());
6619 writeInferredLatticeDotFile(cd, null, locOrder, nameSuffix);
6622 public void writeInferredLatticeDotFile(ClassDescriptor cd, MethodDescriptor md,
6623 SSJavaLattice<String> locOrder, String nameSuffix) {
6625 String fileName = "lattice_";
6628 cd.getSymbol().replaceAll("[\\W_]", "") + "_" + md.toString().replaceAll("[\\W_]", "");
6630 fileName += cd.getSymbol().replaceAll("[\\W_]", "");
6633 fileName += nameSuffix;
6635 System.out.println("***lattice=" + fileName + " setsize=" + locOrder.getKeySet().size());
6637 Set<Pair<String, String>> pairSet = locOrder.getOrderingPairSet();
6639 Set<String> addedLocSet = new HashSet<String>();
6641 if (pairSet.size() > 0) {
6643 BufferedWriter bw = new BufferedWriter(new FileWriter(fileName + ".dot"));
6645 bw.write("digraph " + fileName + " {\n");
6647 for (Iterator iterator = pairSet.iterator(); iterator.hasNext();) {
6648 // pair is in the form of <higher, lower>
6649 Pair<String, String> pair = (Pair<String, String>) iterator.next();
6651 String highLocId = pair.getFirst();
6652 String lowLocId = pair.getSecond();
6653 if (!addedLocSet.contains(highLocId)) {
6654 addedLocSet.add(highLocId);
6655 drawNode(bw, locOrder, highLocId);
6658 if (!addedLocSet.contains(lowLocId)) {
6659 addedLocSet.add(lowLocId);
6660 drawNode(bw, locOrder, lowLocId);
6663 bw.write(highLocId + " -> " + lowLocId + ";\n");
6668 } catch (IOException e) {
6669 e.printStackTrace();
6676 private String convertMergeSetToString(HierarchyGraph graph, Set<HNode> mergeSet) {
6678 for (Iterator iterator = mergeSet.iterator(); iterator.hasNext();) {
6679 HNode merged = (HNode) iterator.next();
6680 if (merged.isMergeNode()) {
6681 str += convertMergeSetToString(graph, graph.getMapHNodetoMergeSet().get(merged));
6683 str += " " + merged.getName();
6689 public void addNaiveLattice(Descriptor desc, SSJavaLattice<String> lattice) {
6690 desc2naiveLattice.put(desc, lattice);
6693 private void drawNode(BufferedWriter bw, SSJavaLattice<String> lattice, String locName)
6694 throws IOException {
6697 if (lattice.isSharedLoc(locName)) {
6698 prettyStr = locName + "*";
6700 prettyStr = locName;
6702 // HNode node = graph.getHNode(locName);
6703 // if (node != null && node.isMergeNode()) {
6704 // Set<HNode> mergeSet = graph.getMapHNodetoMergeSet().get(node);
6705 // prettyStr += ":" + convertMergeSetToString(graph, mergeSet);
6707 bw.write(locName + " [label=\"" + prettyStr + "\"]" + ";\n");
6710 public void _debug_writeFlowGraph() {
6711 Set<MethodDescriptor> keySet = mapMethodDescriptorToFlowGraph.keySet();
6713 for (Iterator<MethodDescriptor> iterator = keySet.iterator(); iterator.hasNext();) {
6714 MethodDescriptor md = (MethodDescriptor) iterator.next();
6715 FlowGraph fg = mapMethodDescriptorToFlowGraph.get(md);
6716 GlobalFlowGraph subGlobalFlowGraph = getSubGlobalFlowGraph(md);
6719 subGlobalFlowGraph.writeGraph("_SUBGLOBAL");
6720 } catch (IOException e) {
6721 e.printStackTrace();
6729 class CyclicFlowException extends Exception {
6733 class InterDescriptor extends Descriptor {
6735 Pair<MethodInvokeNode, Integer> minArgIdxPair;
6737 public InterDescriptor(String name) {
6741 public void setMethodArgIdxPair(MethodInvokeNode min, int idx) {
6742 minArgIdxPair = new Pair<MethodInvokeNode, Integer>(min, new Integer(idx));
6745 public Pair<MethodInvokeNode, Integer> getMethodArgIdxPair() {
6746 return minArgIdxPair;