X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=Robust%2Fsrc%2FAnalysis%2FSSJava%2FFlowDownCheck.java;h=d01e094eb24759c0f8991a0ebaaf34de383dd7f2;hb=98bc69de0d44f8c7b7e4ce2e11f398e8a0e0a1e7;hp=9d41b8388f24bbbc74d000ac7f51185411ab546f;hpb=f26ede98db53248e03489398e158a5646e63680b;p=IRC.git diff --git a/Robust/src/Analysis/SSJava/FlowDownCheck.java b/Robust/src/Analysis/SSJava/FlowDownCheck.java index 9d41b838..d01e094e 100644 --- a/Robust/src/Analysis/SSJava/FlowDownCheck.java +++ b/Robust/src/Analysis/SSJava/FlowDownCheck.java @@ -23,7 +23,9 @@ import IR.Operation; import IR.State; import IR.SymbolTable; import IR.TypeDescriptor; +import IR.TypeExtension; import IR.VarDescriptor; +import IR.Flat.FlatNode; import IR.Tree.ArrayAccessNode; import IR.Tree.AssignmentNode; import IR.Tree.BlockExpressionNode; @@ -136,7 +138,7 @@ public class FlowDownCheck { toanalyzeList.addAll(classtable.getValueSet()); Collections.sort(toanalyzeList, new Comparator() { public int compare(ClassDescriptor o1, ClassDescriptor o2) { - return o1.getClassName().compareTo(o2.getClassName()); + return o1.getClassName().compareToIgnoreCase(o2.getClassName()); } }); } else { @@ -153,7 +155,7 @@ public class FlowDownCheck { toanalyzeMethodList.addAll(methodtable.getValueSet()); Collections.sort(toanalyzeMethodList, new Comparator() { public int compare(MethodDescriptor o1, MethodDescriptor o2) { - return o1.getSymbol().compareTo(o2.getSymbol()); + return o1.getSymbol().compareToIgnoreCase(o2.getSymbol()); } }); } else { @@ -221,8 +223,11 @@ public class FlowDownCheck { while (!toAnalyzeMethodIsEmpty()) { MethodDescriptor md = toAnalyzeMethodNext(); if (ssjava.needTobeAnnotated(md)) { - System.out.println("SSJAVA: Checking assignments: " + md); - checkMethodBody(cd, md, null); + if (state.SSJAVADEBUG) { + System.out.println("SSJAVA: Checking Flow-down Rules: " + md); + } + CompositeLocation calleePCLOC = ssjava.getPCLocation(md); + checkMethodBody(cd, md, calleePCLOC); } } } @@ -297,33 +302,44 @@ public class FlowDownCheck { for (int i = 0; i < md.numParameters(); i++) { // process annotations on method parameters VarDescriptor vd = (VarDescriptor) md.getParameter(i); - assignLocationOfVarDescriptor(vd, md, md.getParameterTable(), bn); + assignLocationOfVarDescriptor(vd, md, md.getParameterTable(), null); paramList.add(d2loc.get(vd)); } Vector methodAnnotations = md.getModifiers().getAnnotations(); - // second, check return location annotation - if (!md.getReturnType().isVoid()) { - CompositeLocation returnLocComp = null; - - boolean hasReturnLocDeclaration = false; - if (methodAnnotations != null) { - for (int i = 0; i < methodAnnotations.size(); i++) { - AnnotationDescriptor an = methodAnnotations.elementAt(i); - if (an.getMarker().equals(ssjava.RETURNLOC)) { - // this case, developer explicitly defines method lattice - String returnLocDeclaration = an.getValue(); - returnLocComp = parseLocationDeclaration(md, null, returnLocDeclaration); - hasReturnLocDeclaration = true; - } + CompositeLocation returnLocComp = null; + + boolean hasReturnLocDeclaration = false; + if (methodAnnotations != null) { + for (int i = 0; i < methodAnnotations.size(); i++) { + AnnotationDescriptor an = methodAnnotations.elementAt(i); + if (an.getMarker().equals(ssjava.RETURNLOC)) { + // this case, developer explicitly defines method lattice + String returnLocDeclaration = an.getValue(); + returnLocComp = parseLocationDeclaration(md, null, returnLocDeclaration); + hasReturnLocDeclaration = true; + } else if (an.getMarker().equals(ssjava.THISLOC)) { + String thisLoc = an.getValue(); + ssjava.getMethodLattice(md).setThisLoc(thisLoc); + } else if (an.getMarker().equals(ssjava.GLOBALLOC)) { + String globalLoc = an.getValue(); + ssjava.getMethodLattice(md).setGlobalLoc(globalLoc); + } else if (an.getMarker().equals(ssjava.PCLOC)) { + String pcLocDeclaration = an.getValue(); + ssjava.setPCLocation(md, parseLocationDeclaration(md, null, pcLocDeclaration)); } } + } + // second, check return location annotation + if (!md.getReturnType().isVoid()) { if (!hasReturnLocDeclaration) { // if developer does not define method lattice // search return location in the method default lattice String rtrStr = ssjava.getMethodLattice(md).getReturnLoc(); - returnLocComp = new CompositeLocation(new Location(md, rtrStr)); + if (rtrStr != null) { + returnLocComp = new CompositeLocation(new Location(md, rtrStr)); + } } if (returnLocComp == null) { @@ -333,18 +349,17 @@ public class FlowDownCheck { md2ReturnLoc.put(md, returnLocComp); - // check this location + } + + if (!md.getReturnType().isVoid()) { MethodLattice methodLattice = ssjava.getMethodLattice(md); String thisLocId = methodLattice.getThisLoc(); - if (thisLocId == null) { + if ((!md.isStatic()) && thisLocId == null) { throw new Error("Method '" + md + "' does not have the definition of 'this' location at " + md.getClassDesc().getSourceFileName()); } CompositeLocation thisLoc = new CompositeLocation(new Location(md, thisLocId)); paramList.add(0, thisLoc); - - System.out.println("### ReturnLocGenerator=" + md); - System.out.println("### md2ReturnLoc.get(md)=" + md2ReturnLoc.get(md)); md2ReturnLocGen.put(md, new ReturnLocGenerator(md2ReturnLoc.get(md), md, paramList, md + " of " + cd.getSourceFileName())); } @@ -538,15 +553,20 @@ public class FlowDownCheck { checkLocationFromExpressionNode(md, nametable, returnExp, new CompositeLocation(), constraint, false); + // System.out.println("# RETURN VALUE LOC=" + returnValueLoc + + // " with constraint=" + constraint); + + // TODO: do we need to check here? // if this return statement is inside branch, return value has an implicit // flow from conditional location - if (constraint != null) { - Set inputGLB = new HashSet(); - inputGLB.add(returnValueLoc); - inputGLB.add(constraint); - returnValueLoc = - CompositeLattice.calculateGLB(inputGLB, generateErrorMessage(md.getClassDesc(), rn)); - } + // if (constraint != null) { + // Set inputGLB = new HashSet(); + // inputGLB.add(returnValueLoc); + // inputGLB.add(constraint); + // returnValueLoc = + // CompositeLattice.calculateGLB(inputGLB, + // generateErrorMessage(md.getClassDesc(), rn)); + // } // check if return value is equal or higher than RETRUNLOC of method // declaration annotation @@ -594,6 +614,12 @@ public class FlowDownCheck { // check 'for loop' case BlockNode bn = ln.getInitializer(); bn.getVarTable().setParent(nametable); + // need to check initialization node + // checkLocationFromBlockNode(md, bn.getVarTable(), bn, constraint); + for (int i = 0; i < bn.size(); i++) { + BlockStatementNode bsn = bn.get(i); + checkLocationFromBlockStatementNode(md, bn.getVarTable(), bsn, constraint); + } // calculate glb location of condition and update statements CompositeLocation condLoc = @@ -642,7 +668,6 @@ public class FlowDownCheck { constraint, false); // addLocationType(isn.getCondition().getType(), condLoc); - constraint = generateNewConstraint(constraint, condLoc); checkLocationFromBlockNode(md, nametable, isn.getTrueBlock(), constraint); @@ -653,6 +678,32 @@ public class FlowDownCheck { return new CompositeLocation(); } + private void checkOwnership(MethodDescriptor md, TreeNode tn, ExpressionNode srcExpNode) { + + if (srcExpNode.kind() == Kind.NameNode || srcExpNode.kind() == Kind.FieldAccessNode) { + if (srcExpNode.getType().isPtr() && !srcExpNode.getType().isNull()) { + // first, check the linear type + // RHS reference should be owned by the current method + FieldDescriptor fd = getFieldDescriptorFromExpressionNode(srcExpNode); + boolean isOwned; + if (fd == null) { + // local var case + isOwned = ((SSJavaType) srcExpNode.getType().getExtension()).isOwned(); + } else { + // field case + isOwned = ssjava.isOwnedByMethod(md, fd); + } + if (!isOwned) { + throw new Error( + "It is not allowed to create the reference alias from the reference not owned by the method at " + + generateErrorMessage(md.getClassDesc(), tn)); + } + + } + } + + } + private CompositeLocation checkLocationFromDeclarationNode(MethodDescriptor md, SymbolTable nametable, DeclarationNode dn, CompositeLocation constraint) { @@ -661,12 +712,16 @@ public class FlowDownCheck { CompositeLocation destLoc = d2loc.get(vd); if (dn.getExpression() != null) { + + checkOwnership(md, dn, dn.getExpression()); + CompositeLocation expressionLoc = checkLocationFromExpressionNode(md, nametable, dn.getExpression(), new CompositeLocation(), constraint, false); // addTypeLocation(dn.getExpression().getType(), expressionLoc); if (expressionLoc != null) { + // checking location order if (!CompositeLattice.isGreaterThan(expressionLoc, destLoc, generateErrorMessage(md.getClassDesc(), dn))) { @@ -687,11 +742,12 @@ public class FlowDownCheck { private void checkDeclarationInSubBlockNode(MethodDescriptor md, SymbolTable nametable, SubBlockNode sbn) { - checkDeclarationInBlockNode(md, nametable.getParent(), sbn.getBlockNode()); + checkDeclarationInBlockNode(md, nametable, sbn.getBlockNode()); } private CompositeLocation checkLocationFromBlockExpressionNode(MethodDescriptor md, SymbolTable nametable, BlockExpressionNode ben, CompositeLocation constraint) { + CompositeLocation compLoc = checkLocationFromExpressionNode(md, nametable, ben.getExpression(), null, constraint, false); // addTypeLocation(ben.getExpression().getType(), compLoc); @@ -805,6 +861,13 @@ public class FlowDownCheck { // values // in this case, we don't need to check flow down rule! + // System.out.println("\n#tertiary cond=" + tn.getCond().printNode(0) + + // " Loc=" + condLoc); + // System.out.println("# true=" + tn.getTrueExpr().printNode(0) + " Loc=" + + // trueLoc); + // System.out.println("# false=" + tn.getFalseExpr().printNode(0) + " Loc=" + // + falseLoc); + // check if condLoc is higher than trueLoc & falseLoc if (!trueLoc.get(0).isTop() && !CompositeLattice.isGreaterThan(condLoc, trueLoc, generateErrorMessage(cd, tn))) { @@ -817,7 +880,7 @@ public class FlowDownCheck { && !CompositeLattice.isGreaterThan(condLoc, falseLoc, generateErrorMessage(cd, tn.getCond()))) { throw new Error( - "The location of the condition expression is lower than the true expression at " + "The location of the condition expression is lower than the false expression at " + cd.getSourceFileName() + ":" + tn.getCond().getNumLine()); } @@ -826,7 +889,12 @@ public class FlowDownCheck { glbInputSet.add(trueLoc); glbInputSet.add(falseLoc); - return CompositeLattice.calculateGLB(glbInputSet, generateErrorMessage(cd, tn)); + if (glbInputSet.size() == 1) { + return trueLoc; + } else { + return CompositeLattice.calculateGLB(glbInputSet, generateErrorMessage(cd, tn)); + } + } private CompositeLocation checkLocationFromMethodInvokeNode(MethodDescriptor md, @@ -834,16 +902,24 @@ public class FlowDownCheck { CompositeLocation constraint) { ClassDescriptor cd = md.getClassDesc(); - MethodDescriptor calleeMD = min.getMethod(); + MethodDescriptor calleeMethodDesc = min.getMethod(); + + NameDescriptor baseName = min.getBaseName(); + boolean isSystemout = false; + if (baseName != null) { + isSystemout = baseName.getSymbol().equals("System.out"); + } + + if (!ssjava.isSSJavaUtil(calleeMethodDesc.getClassDesc()) + && !ssjava.isTrustMethod(calleeMethodDesc) && !calleeMethodDesc.getModifiers().isNative() + && !isSystemout) { - if (!ssjava.isTrustMethod(calleeMD)) { CompositeLocation baseLocation = null; if (min.getExpression() != null) { baseLocation = checkLocationFromExpressionNode(md, nametable, min.getExpression(), new CompositeLocation(), constraint, false); } else { - if (min.getMethod().isStatic()) { String globalLocId = ssjava.getMethodLattice(md).getGlobalLoc(); if (globalLocId == null) { @@ -855,40 +931,104 @@ public class FlowDownCheck { String thisLocId = ssjava.getMethodLattice(md).getThisLoc(); baseLocation = new CompositeLocation(new Location(md, thisLocId)); } + } + + // System.out.println("\n#checkLocationFromMethodInvokeNode=" + + // min.printNode(0) + // + " baseLocation=" + baseLocation + " constraint=" + constraint); + + // setup the location list of caller's arguments + List callerArgList = new ArrayList(); + + // setup the location list of callee's parameters + MethodLattice calleeLattice = ssjava.getMethodLattice(calleeMethodDesc); + List calleeParamList = new ArrayList(); + + if (min.numArgs() > 0) { + if (!calleeMethodDesc.isStatic()) { + callerArgList.add(baseLocation); + } + for (int i = 0; i < min.numArgs(); i++) { + ExpressionNode en = min.getArg(i); + CompositeLocation callerArgLoc = + checkLocationFromExpressionNode(md, nametable, en, new CompositeLocation(), + constraint, false); + callerArgList.add(callerArgLoc); + } + + if (!calleeMethodDesc.isStatic()) { + CompositeLocation calleeThisLoc = + new CompositeLocation(new Location(calleeMethodDesc, calleeLattice.getThisLoc())); + calleeParamList.add(calleeThisLoc); + } + for (int i = 0; i < calleeMethodDesc.numParameters(); i++) { + VarDescriptor calleevd = (VarDescriptor) calleeMethodDesc.getParameter(i); + CompositeLocation calleeLoc = d2loc.get(calleevd); + calleeParamList.add(calleeLoc); + } } - System.out.println("\n#checkLocationFromMethodInvokeNode=" + min.printNode(0) - + " baseLocation=" + baseLocation); + if (constraint != null) { + // check whether the PC location is lower than one of the + // argument locations. If it is lower, the callee has to have @PCLOC + // annotation that declares the program counter that is higher than + // corresponding parameter + + CompositeLocation calleePCLOC = ssjava.getPCLocation(calleeMethodDesc); + + for (int idx = 0; idx < callerArgList.size(); idx++) { + CompositeLocation argLocation = callerArgList.get(idx); + + // need to check that param is higher than PCLOC + if (!argLocation.get(0).isTop() + && CompositeLattice.compare(argLocation, constraint, true, + generateErrorMessage(cd, min)) == ComparisonResult.GREATER) { + + CompositeLocation paramLocation = calleeParamList.get(idx); + + int paramCompareResult = + CompositeLattice.compare(calleePCLOC, paramLocation, true, + generateErrorMessage(cd, min)); + + if (paramCompareResult == ComparisonResult.GREATER) { + throw new Error( + "The program counter location " + + constraint + + " is lower than the argument(idx=" + + idx + + ") location " + + argLocation + + ". Need to specify that the initial PC location of the callee, which is currently set to " + + calleePCLOC + ", is lower than " + paramLocation + " in the method " + + calleeMethodDesc.getSymbol() + ":" + min.getNumLine()); + } + + } + + } - int compareResult = - CompositeLattice.compare(constraint, baseLocation, true, generateErrorMessage(cd, min)); - - if (compareResult == ComparisonResult.LESS) { - throw new Error("Method invocation does not respect the current branch constraint at " - + generateErrorMessage(cd, min)); - } else if (compareResult != ComparisonResult.GREATER) { - // if the current constraint is higher than method's THIS location - // no need to check constraints! - CompositeLocation calleeConstraint = - translateCallerLocToCalleeLoc(calleeMD, baseLocation, constraint); - checkMethodBody(calleeMD.getClassDesc(), calleeMD, calleeConstraint); } checkCalleeConstraints(md, nametable, min, baseLocation, constraint); - checkCallerArgumentLocationConstraints(md, nametable, min, baseLocation, constraint); + // checkCallerArgumentLocationConstraints(md, nametable, min, + // baseLocation, constraint); if (!min.getMethod().getReturnType().isVoid()) { // If method has a return value, compute the highest possible return // location in the caller's perspective CompositeLocation ceilingLoc = computeCeilingLocationForCaller(md, nametable, min, baseLocation, constraint); + + if (ceilingLoc == null) { + return new CompositeLocation(Location.createTopLocation(md)); + } return ceilingLoc; } } - return new CompositeLocation(); + return new CompositeLocation(Location.createTopLocation(md)); } @@ -943,8 +1083,10 @@ public class FlowDownCheck { String errorMsg = generateErrorMessage(md.getClassDesc(), min); - System.out.println("checkCallerArgumentLocationConstraints=" + min.printNode(0)); - System.out.println("base location=" + callerBaseLoc); + // System.out.println("checkCallerArgumentLocationConstraints=" + + // min.printNode(0)); + // System.out.println("base location=" + callerBaseLoc + " constraint=" + + // constraint); for (int i = 0; i < calleeParamList.size(); i++) { CompositeLocation calleeParamLoc = calleeParamList.get(i); @@ -989,7 +1131,8 @@ public class FlowDownCheck { translate.addLocation(calleeParamLoc.get(i)); } - System.out.println("TRANSLATED=" + translate + " from calleeParamLoc=" + calleeParamLoc); + // System.out.println("TRANSLATED=" + translate + " from calleeParamLoc=" + + // calleeParamLoc); return translate; } @@ -1000,7 +1143,9 @@ public class FlowDownCheck { List argList = new ArrayList(); // by default, method has a THIS parameter - argList.add(baseLocation); + if (!md.isStatic()) { + argList.add(baseLocation); + } for (int i = 0; i < min.numArgs(); i++) { ExpressionNode en = min.getArg(i); @@ -1010,9 +1155,10 @@ public class FlowDownCheck { argList.add(callerArg); } - System.out.println("\n## computeReturnLocation=" + min.getMethod() + " argList=" + argList); + // System.out.println("\n## computeReturnLocation=" + min.getMethod() + + // " argList=" + argList); CompositeLocation ceilLoc = md2ReturnLocGen.get(min.getMethod()).computeReturnLocation(argList); - System.out.println("## ReturnLocation=" + ceilLoc); + // System.out.println("## ReturnLocation=" + ceilLoc); return ceilLoc; @@ -1021,11 +1167,10 @@ public class FlowDownCheck { private void checkCalleeConstraints(MethodDescriptor md, SymbolTable nametable, MethodInvokeNode min, CompositeLocation callerBaseLoc, CompositeLocation constraint) { - System.out.println("checkCalleeConstraints=" + min.printNode(0)); - MethodDescriptor calleemd = min.getMethod(); MethodLattice calleeLattice = ssjava.getMethodLattice(calleemd); + CompositeLocation calleeThisLoc = new CompositeLocation(new Location(calleemd, calleeLattice.getThisLoc())); @@ -1038,7 +1183,8 @@ public class FlowDownCheck { // setup caller args set // first, add caller's base(this) location - callerArgList.add(callerBaseLoc); + if (!calleemd.isStatic()) + callerArgList.add(callerBaseLoc); // second, add caller's arguments for (int i = 0; i < min.numArgs(); i++) { ExpressionNode en = min.getArg(i); @@ -1050,12 +1196,13 @@ public class FlowDownCheck { // setup callee params set // first, add callee's this location - calleeParamList.add(calleeThisLoc); + if (!calleemd.isStatic()) + calleeParamList.add(calleeThisLoc); // second, add callee's parameters for (int i = 0; i < calleemd.numParameters(); i++) { VarDescriptor calleevd = (VarDescriptor) calleemd.getParameter(i); CompositeLocation calleeLoc = d2loc.get(calleevd); - System.out.println("calleevd=" + calleevd + " loc=" + calleeLoc); + // System.out.println("calleevd=" + calleevd + " loc=" + calleeLoc); calleeParamList.add(calleeLoc); } @@ -1075,15 +1222,27 @@ public class FlowDownCheck { continue CHECK; } - System.out.println("calleeLoc1=" + calleeLoc1); - System.out.println("calleeLoc2=" + calleeLoc2 + "calleeParamList=" + calleeParamList); + // System.out.println("calleeLoc1=" + calleeLoc1); + // System.out.println("calleeLoc2=" + calleeLoc2 + + // "calleeParamList=" + calleeParamList); int callerResult = CompositeLattice.compare(callerLoc1, callerLoc2, true, generateErrorMessage(md.getClassDesc(), min)); + // System.out.println("callerResult=" + callerResult); int calleeResult = CompositeLattice.compare(calleeLoc1, calleeLoc2, true, generateErrorMessage(md.getClassDesc(), min)); + // System.out.println("calleeResult=" + calleeResult); + + if (callerResult == ComparisonResult.EQUAL) { + if (ssjava.isSharedLocation(callerLoc1.get(callerLoc1.getSize() - 1)) + && ssjava.isSharedLocation(callerLoc2.get(callerLoc2.getSize() - 1))) { + // if both of them are shared locations, promote them to + // "GREATER relation" + callerResult = ComparisonResult.GREATER; + } + } if (calleeResult == ComparisonResult.GREATER && callerResult != ComparisonResult.GREATER) { @@ -1127,6 +1286,7 @@ public class FlowDownCheck { CompositeLocation arrayLoc = checkLocationFromExpressionNode(md, nametable, aan.getExpression(), new CompositeLocation(), constraint, isLHS); + // addTypeLocation(aan.getExpression().getType(), arrayLoc); CompositeLocation indexLoc = checkLocationFromExpressionNode(md, nametable, aan.getIndex(), new CompositeLocation(), @@ -1175,11 +1335,13 @@ public class FlowDownCheck { // addTypeLocation(on.getRight().getType(), rightLoc); } - System.out.println("\n# OP NODE=" + on.printNode(0)); - System.out.println("# left loc=" + leftLoc + " from " + on.getLeft().getClass()); - if (on.getRight() != null) { - System.out.println("# right loc=" + rightLoc + " from " + on.getRight().getClass()); - } + // System.out.println("\n# OP NODE=" + on.printNode(0)); + // System.out.println("# left loc=" + leftLoc + " from " + + // on.getLeft().getClass()); + // if (on.getRight() != null) { + // System.out.println("# right loc=" + rightLoc + " from " + + // on.getRight().getClass()); + // } Operation op = on.getOp(); @@ -1218,7 +1380,6 @@ public class FlowDownCheck { inputSet.add(rightLoc); CompositeLocation glbCompLoc = CompositeLattice.calculateGLB(inputSet, generateErrorMessage(cd, on)); - System.out.println("# glbCompLoc=" + glbCompLoc); return glbCompLoc; default: @@ -1268,7 +1429,7 @@ public class FlowDownCheck { VarDescriptor vd = (VarDescriptor) d; // localLoc = d2loc.get(vd); // the type of var descriptor has a composite location! - loc = ((CompositeLocation) vd.getType().getExtension()).clone(); + loc = ((SSJavaType) vd.getType().getExtension()).getCompLoc().clone(); } else if (d instanceof FieldDescriptor) { // the type of field descriptor has a location! FieldDescriptor fd = (FieldDescriptor) d; @@ -1301,7 +1462,7 @@ public class FlowDownCheck { loc.addLocation(fieldLoc); } else if (d == null) { // access static field - ClassDescriptor cd = nn.getClassDesc(); + FieldDescriptor fd = nn.getField(); MethodLattice localLattice = ssjava.getMethodLattice(md); String globalLocId = localLattice.getGlobalLoc(); @@ -1310,6 +1471,10 @@ public class FlowDownCheck { + generateErrorMessage(md.getClassDesc(), nn)); } loc.addLocation(new Location(md, globalLocId)); + + Location fieldLoc = (Location) fd.getType().getExtension(); + loc.addLocation(fieldLoc); + return loc; } @@ -1340,21 +1505,36 @@ public class FlowDownCheck { } } + Set inputGLB = new HashSet(); + if (left instanceof ArrayAccessNode) { + ArrayAccessNode aan = (ArrayAccessNode) left; + CompositeLocation indexLoc = + checkLocationFromExpressionNode(md, nametable, aan.getIndex(), loc, constraint, false); + inputGLB.add(indexLoc); + } + loc = checkLocationFromExpressionNode(md, nametable, left, loc, constraint, false); - System.out.println("### checkLocationFromFieldAccessNode=" + fan.printNode(0)); - System.out.println("### left=" + left.printNode(0)); + if (!left.getType().isPrimitive()) { - Location fieldLoc = getFieldLocation(fd); - loc.addLocation(fieldLoc); + + if (!fd.getSymbol().equals("length")) { + // array.length access, return the location of the array + Location fieldLoc = getFieldLocation(fd); + loc.addLocation(fieldLoc); + } + } + inputGLB.add(loc); + loc = CompositeLattice.calculateGLB(inputGLB, generateErrorMessage(md.getClassDesc(), fan)); return loc; } private Location getFieldLocation(FieldDescriptor fd) { - System.out.println("### getFieldLocation=" + fd); - System.out.println("### fd.getType().getExtension()=" + fd.getType().getExtension()); + // System.out.println("### getFieldLocation=" + fd); + // System.out.println("### fd.getType().getExtension()=" + + // fd.getType().getExtension()); Location fieldLoc = (Location) fd.getType().getExtension(); @@ -1368,11 +1548,28 @@ public class FlowDownCheck { } - private CompositeLocation checkLocationFromAssignmentNode(MethodDescriptor md, - SymbolTable nametable, AssignmentNode an, CompositeLocation loc, CompositeLocation constraint) { + private FieldDescriptor getFieldDescriptorFromExpressionNode(ExpressionNode en) { + + if (en.kind() == Kind.NameNode) { + NameNode nn = (NameNode) en; + if (nn.getField() != null) { + return nn.getField(); + } + + if (nn.getName() != null && nn.getName().getBase() != null) { + return getFieldDescriptorFromExpressionNode(nn.getExpression()); + } + + } else if (en.kind() == Kind.FieldAccessNode) { + FieldAccessNode fan = (FieldAccessNode) en; + return fan.getField(); + } - System.out.println("\n# ASSIGNMENTNODE=" + an.printNode(0)); + return null; + } + private CompositeLocation checkLocationFromAssignmentNode(MethodDescriptor md, + SymbolTable nametable, AssignmentNode an, CompositeLocation loc, CompositeLocation constraint) { ClassDescriptor cd = md.getClassDesc(); Set inputGLBSet = new HashSet(); @@ -1393,24 +1590,36 @@ public class FlowDownCheck { CompositeLocation srcLocation; if (!postinc) { + + checkOwnership(md, an, an.getSrc()); + rhsLocation = checkLocationFromExpressionNode(md, nametable, an.getSrc(), new CompositeLocation(), constraint, false); - srcLocation = rhsLocation; + if (an.getOperation().getOp() >= 2 && an.getOperation().getOp() <= 12) { + // if assignment contains OP+EQ operator, need to merge location types + // of LHS & RHS into the RHS + Set srcGLBSet = new HashSet(); + srcGLBSet.add(rhsLocation); + srcGLBSet.add(destLocation); + srcLocation = CompositeLattice.calculateGLB(srcGLBSet, generateErrorMessage(cd, an)); + } else { + srcLocation = rhsLocation; + } - // if (!rhsLocation.get(rhsLocation.getSize() - 1).isTop()) { if (constraint != null) { - inputGLBSet.add(rhsLocation); - inputGLBSet.add(constraint); - srcLocation = CompositeLattice.calculateGLB(inputGLBSet, generateErrorMessage(cd, an)); - } - // } - System.out.println("dstLocation=" + destLocation); - System.out.println("rhsLocation=" + rhsLocation); - System.out.println("srcLocation=" + srcLocation); - System.out.println("constraint=" + constraint); + if (!CompositeLattice.isGreaterThan(constraint, destLocation, generateErrorMessage(cd, an))) { + throw new Error("The value flow from " + constraint + " to " + destLocation + + " does not respect location hierarchy on the assignment " + an.printNode(0) + + " at " + cd.getSourceFileName() + "::" + an.getNumLine()); + } + // inputGLBSet.add(srcLocation); + // inputGLBSet.add(constraint); + // srcLocation = CompositeLattice.calculateGLB(inputGLBSet, + // generateErrorMessage(cd, an)); + } if (!CompositeLattice.isGreaterThan(srcLocation, destLocation, generateErrorMessage(cd, an))) { @@ -1424,6 +1633,16 @@ public class FlowDownCheck { + " at " + cd.getSourceFileName() + "::" + an.getNumLine()); } + if (srcLocation.equals(destLocation)) { + // keep it for definitely written analysis + Set flatNodeSet = ssjava.getBuildFlat().getFlatNodeSet(an); + for (Iterator iterator = flatNodeSet.iterator(); iterator.hasNext();) { + FlatNode fn = (FlatNode) iterator.next(); + ssjava.addSameHeightWriteFlatNode(fn); + } + + } + } else { destLocation = rhsLocation = @@ -1431,17 +1650,21 @@ public class FlowDownCheck { constraint, false); if (constraint != null) { - inputGLBSet.add(rhsLocation); - inputGLBSet.add(constraint); - srcLocation = CompositeLattice.calculateGLB(inputGLBSet, generateErrorMessage(cd, an)); + + if (!CompositeLattice.isGreaterThan(constraint, destLocation, generateErrorMessage(cd, an))) { + throw new Error("The value flow from " + constraint + " to " + destLocation + + " does not respect location hierarchy on the assignment " + an.printNode(0) + + " at " + cd.getSourceFileName() + "::" + an.getNumLine()); + } + // inputGLBSet.add(rhsLocation); + // inputGLBSet.add(constraint); + // srcLocation = CompositeLattice.calculateGLB(inputGLBSet, + // generateErrorMessage(cd, an)); + srcLocation = rhsLocation; } else { srcLocation = rhsLocation; } - System.out.println("srcLocation=" + srcLocation); - System.out.println("rhsLocation=" + rhsLocation); - System.out.println("constraint=" + constraint); - if (!CompositeLattice.isGreaterThan(srcLocation, destLocation, generateErrorMessage(cd, an))) { if (srcLocation.equals(destLocation)) { @@ -1456,6 +1679,15 @@ public class FlowDownCheck { } + if (srcLocation.equals(destLocation)) { + // keep it for definitely written analysis + Set flatNodeSet = ssjava.getBuildFlat().getFlatNodeSet(an); + for (Iterator iterator = flatNodeSet.iterator(); iterator.hasNext();) { + FlatNode fn = (FlatNode) iterator.next(); + ssjava.addSameHeightWriteFlatNode(fn); + } + } + } return destLocation; @@ -1469,37 +1701,41 @@ public class FlowDownCheck { // currently enforce every variable to have corresponding location if (annotationVec.size() == 0) { - throw new Error("Location is not assigned to variable " + vd.getSymbol() + " in the method " - + md.getSymbol() + " of the class " + cd.getSymbol()); + throw new Error("Location is not assigned to variable '" + vd.getSymbol() + + "' in the method '" + md + "' of the class " + cd.getSymbol() + " at " + + generateErrorMessage(cd, n)); } - if (annotationVec.size() > 1) { // variable can have at most one location - throw new Error(vd.getSymbol() + " has more than one location."); - } + int locDecCount = 0; + for (int i = 0; i < annotationVec.size(); i++) { + AnnotationDescriptor ad = annotationVec.elementAt(i); - AnnotationDescriptor ad = annotationVec.elementAt(0); + if (ad.getType() == AnnotationDescriptor.SINGLE_ANNOTATION) { - if (ad.getType() == AnnotationDescriptor.SINGLE_ANNOTATION) { + if (ad.getMarker().equals(SSJavaAnalysis.LOC)) { + locDecCount++; + if (locDecCount > 1) {// variable can have at most one location + throw new Error(vd.getSymbol() + " has more than one location declaration."); + } + String locDec = ad.getValue(); // check if location is defined - if (ad.getMarker().equals(SSJavaAnalysis.LOC)) { - String locDec = ad.getValue(); // check if location is defined + if (locDec.startsWith(SSJavaAnalysis.DELTA)) { + DeltaLocation deltaLoc = parseDeltaDeclaration(md, n, locDec); + d2loc.put(vd, deltaLoc); + addLocationType(vd.getType(), deltaLoc); + } else { + CompositeLocation compLoc = parseLocationDeclaration(md, n, locDec); - if (locDec.startsWith(SSJavaAnalysis.DELTA)) { - DeltaLocation deltaLoc = parseDeltaDeclaration(md, n, locDec); - d2loc.put(vd, deltaLoc); - addLocationType(vd.getType(), deltaLoc); - } else { - CompositeLocation compLoc = parseLocationDeclaration(md, n, locDec); + Location lastElement = compLoc.get(compLoc.getSize() - 1); + if (ssjava.isSharedLocation(lastElement)) { + ssjava.mapSharedLocation2Descriptor(lastElement, vd); + } - Location lastElement = compLoc.get(compLoc.getSize() - 1); - if (ssjava.isSharedLocation(lastElement)) { - ssjava.mapSharedLocation2Descriptor(lastElement, vd); + d2loc.put(vd, compLoc); + addLocationType(vd.getType(), compLoc); } - d2loc.put(vd, compLoc); - addLocationType(vd.getType(), compLoc); } - } } @@ -1535,7 +1771,8 @@ public class FlowDownCheck { Descriptor d = state.getClassSymbolTable().get(className); if (d == null) { - System.out.println("state.getClassSymbolTable()=" + state.getClassSymbolTable()); + // System.out.println("state.getClassSymbolTable()=" + + // state.getClassSymbolTable()); throw new Error("The class in the location declaration '" + decl + "' does not exist at " + msg); } @@ -1571,7 +1808,6 @@ public class FlowDownCheck { SSJavaLattice localLattice = CompositeLattice.getLatticeByDescriptor(md); Location localLoc = new Location(md, localLocId); if (localLattice == null || (!localLattice.containsKey(localLocId))) { - System.out.println("locDec=" + locDec); throw new Error("Location " + localLocId + " is not defined in the local variable lattice at " + md.getClassDesc().getSourceFileName() + "::" + (n != null ? n.getNumLine() : md) + "."); @@ -1659,7 +1895,15 @@ public class FlowDownCheck { private void addLocationType(TypeDescriptor type, CompositeLocation loc) { if (type != null) { - type.setExtension(loc); + TypeExtension te = type.getExtension(); + SSJavaType ssType; + if (te != null) { + ssType = (SSJavaType) te; + ssType.setCompLoc(loc); + } else { + ssType = new SSJavaType(loc); + type.setExtension(ssType); + } } } @@ -1673,7 +1917,8 @@ public class FlowDownCheck { public static boolean isGreaterThan(CompositeLocation loc1, CompositeLocation loc2, String msg) { - System.out.println("\nisGreaterThan=" + loc1 + " " + loc2 + " msg=" + msg); + // System.out.println("\nisGreaterThan=" + loc1 + " " + loc2 + " msg=" + + // msg); int baseCompareResult = compareBaseLocationSet(loc1, loc2, true, false, msg); if (baseCompareResult == ComparisonResult.EQUAL) { if (compareDelta(loc1, loc2) == ComparisonResult.GREATER) { @@ -1692,7 +1937,7 @@ public class FlowDownCheck { public static int compare(CompositeLocation loc1, CompositeLocation loc2, boolean ignore, String msg) { - System.out.println("compare=" + loc1 + " " + loc2); + // System.out.println("compare=" + loc1 + " " + loc2); int baseCompareResult = compareBaseLocationSet(loc1, loc2, false, ignore, msg); if (baseCompareResult == ComparisonResult.EQUAL) { @@ -1809,7 +2054,7 @@ public class FlowDownCheck { public static CompositeLocation calculateGLB(Set inputSet, String errMsg) { - System.out.println("Calculating GLB=" + inputSet); + // System.out.println("Calculating GLB=" + inputSet); CompositeLocation glbCompLoc = new CompositeLocation(); // calculate GLB of the first(priority) element @@ -1858,7 +2103,6 @@ public class FlowDownCheck { SSJavaLattice locOrder = getLatticeByDescriptor(priorityDescriptor); String glbOfPriorityLoc = locOrder.getGLB(priorityLocIdentifierSet); - glbCompLoc.addLocation(new Location(priorityDescriptor, glbOfPriorityLoc)); Set compSet = locId2CompLocSet.get(glbOfPriorityLoc); @@ -1941,7 +2185,7 @@ public class FlowDownCheck { } } - System.out.println("GLB=" + glbCompLoc); + // System.out.println("GLB=" + glbCompLoc); return glbCompLoc; } @@ -2119,8 +2363,17 @@ class ReturnLocGenerator { // compute GLB of arguments subset that are same or higher than return // location - CompositeLocation glb = CompositeLattice.calculateGLB(inputGLB, ""); - return glb; + if (inputGLB.isEmpty()) { + if (args.size() == 0) { + return null; + } + CompositeLocation rtr = + new CompositeLocation(Location.createTopLocation(args.get(0).get(0).getDescriptor())); + return rtr; + } else { + CompositeLocation glb = CompositeLattice.calculateGLB(inputGLB, ""); + return glb; + } } }