Java Code Examples for org.apache.bcel.generic.Type#equals()
The following examples show how to use
org.apache.bcel.generic.Type#equals() .
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Example 1
| Source File: FindRefComparison.java From spotbugs with GNU Lesser General Public License v2.1 | 5 votes |
|
@Override
public void initEntryFact(TypeFrame result) {
super.initEntryFact(result);
for (int i = 0; i < methodGen.getMaxLocals(); i++) {
Type t = result.getValue(i);
if (t.equals(Type.STRING)) {
result.setValue(i, parameterStringTypeInstance);
}
}
}
Example 2
| Source File: IncompatibleTypes.java From spotbugs with GNU Lesser General Public License v2.1 | 5 votes |
|
private static IncompatibleTypes getPriorityForAssumingCompatibleWithArray(Type rhsType) {
if (rhsType.equals(Type.OBJECT)) {
return ARRAY_AND_OBJECT;
}
String sig = rhsType.getSignature();
if ("Ljava/io/Serializable;".equals(sig) || "Ljava/lang/Cloneable;".equals(sig)) {
return SEEMS_OK;
}
return ARRAY_AND_NON_ARRAY;
}
Example 3
| Source File: FindUseOfNonSerializableValue.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
|
private void analyzeMethod(ClassContext classContext, Method method) throws CFGBuilderException, DataflowAnalysisException {
MethodGen methodGen = classContext.getMethodGen(method);
if (methodGen == null) {
return;
}
BitSet bytecodeSet = classContext.getBytecodeSet(method);
if (bytecodeSet == null) {
return;
}
// We don't adequately model instanceof interfaces yet
if (bytecodeSet.get(Const.INSTANCEOF) || bytecodeSet.get(Const.CHECKCAST)) {
return;
}
CFG cfg = classContext.getCFG(method);
TypeDataflow typeDataflow = classContext.getTypeDataflow(method);
ConstantPoolGen cpg = classContext.getConstantPoolGen();
String sourceFile = classContext.getJavaClass().getSourceFileName();
if (DEBUG) {
String methodName = methodGen.getClassName() + "." + methodGen.getName();
System.out.println("Checking " + methodName);
}
for (Iterator<Location> i = cfg.locationIterator(); i.hasNext();) {
Location location = i.next();
InstructionHandle handle = location.getHandle();
Instruction ins = handle.getInstruction();
Use use = getUse(cpg, ins);
if (use == null) {
continue;
}
TypeFrame frame = typeDataflow.getFactAtLocation(location);
if (!frame.isValid()) {
// This basic block is probably dead
continue;
}
Type operandType = frame.getTopValue();
if (operandType.equals(TopType.instance())) {
// unreachable
continue;
}
if (!(operandType instanceof ReferenceType)) {
// Shouldn't happen - illegal bytecode
continue;
}
ReferenceType refType = (ReferenceType) operandType;
if (refType.equals(NullType.instance())) {
continue;
}
try {
double isSerializable = DeepSubtypeAnalysis.isDeepSerializable(refType);
if (isSerializable < 0.9) {
SourceLineAnnotation sourceLineAnnotation = SourceLineAnnotation.fromVisitedInstruction(classContext,
methodGen, sourceFile, handle);
ReferenceType problem = DeepSubtypeAnalysis.getLeastSerializableTypeComponent(refType);
String pattern;
switch (use) {
case PASSED_TO_WRITE_OBJECT:
pattern = "DMI_NONSERIALIZABLE_OBJECT_WRITTEN";
double isRemote = DeepSubtypeAnalysis.isDeepRemote(refType);
if (isRemote >= 0.9) {
continue;
}
if (isSerializable < isRemote) {
isSerializable = isRemote;
}
break;
case STORE_INTO_HTTP_SESSION:
pattern = "J2EE_STORE_OF_NON_SERIALIZABLE_OBJECT_INTO_SESSION";
break;
default:
throw new IllegalStateException();
}
bugAccumulator.accumulateBug(new BugInstance(this, pattern,
isSerializable < 0.15 ? HIGH_PRIORITY : isSerializable > 0.5 ? LOW_PRIORITY : NORMAL_PRIORITY)
.addClassAndMethod(methodGen, sourceFile).addType(problem).describe(TypeAnnotation.FOUND_ROLE),
sourceLineAnnotation);
}
} catch (ClassNotFoundException e) {
// ignore
}
}
}
Example 4
| Source File: FindNonSerializableStoreIntoSession.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
|
private void analyzeMethod(ClassContext classContext, Method method) throws CFGBuilderException, DataflowAnalysisException {
MethodGen methodGen = classContext.getMethodGen(method);
if (methodGen == null) {
return;
}
BitSet bytecodeSet = classContext.getBytecodeSet(method);
if (bytecodeSet == null) {
return;
}
// We don't adequately model instanceof interfaces yet
if (bytecodeSet.get(Const.INSTANCEOF) || bytecodeSet.get(Const.CHECKCAST)) {
return;
}
CFG cfg = classContext.getCFG(method);
TypeDataflow typeDataflow = classContext.getTypeDataflow(method);
ConstantPoolGen cpg = classContext.getConstantPoolGen();
String sourceFile = classContext.getJavaClass().getSourceFileName();
if (DEBUG) {
String methodName = methodGen.getClassName() + "." + methodGen.getName();
System.out.println("Checking " + methodName);
}
for (Iterator<Location> i = cfg.locationIterator(); i.hasNext();) {
Location location = i.next();
InstructionHandle handle = location.getHandle();
Instruction ins = handle.getInstruction();
if (!(ins instanceof INVOKEINTERFACE)) {
continue;
}
INVOKEINTERFACE invoke = (INVOKEINTERFACE) ins;
String mName = invoke.getMethodName(cpg);
if (!"setAttribute".equals(mName)) {
continue;
}
String cName = invoke.getClassName(cpg);
if (!"javax.servlet.http.HttpSession".equals(cName)) {
continue;
}
TypeFrame frame = typeDataflow.getFactAtLocation(location);
if (!frame.isValid()) {
// This basic block is probably dead
continue;
}
Type operandType = frame.getTopValue();
if (operandType.equals(TopType.instance())) {
// unreachable
continue;
}
if (!(operandType instanceof ReferenceType)) {
// Shouldn't happen - illegal bytecode
continue;
}
ReferenceType refType = (ReferenceType) operandType;
if (refType.equals(NullType.instance())) {
continue;
}
try {
double isSerializable = DeepSubtypeAnalysis.isDeepSerializable(refType);
if (isSerializable < 0.9) {
SourceLineAnnotation sourceLineAnnotation = SourceLineAnnotation.fromVisitedInstruction(classContext,
methodGen, sourceFile, handle);
ReferenceType problem = DeepSubtypeAnalysis.getLeastSerializableTypeComponent(refType);
bugAccumulator.accumulateBug(new BugInstance(this, "J2EE_STORE_OF_NON_SERIALIZABLE_OBJECT_INTO_SESSION",
isSerializable < 0.15 ? HIGH_PRIORITY : isSerializable > 0.5 ? LOW_PRIORITY : NORMAL_PRIORITY)
.addClassAndMethod(methodGen, sourceFile).addType(problem).describe(TypeAnnotation.FOUND_ROLE),
sourceLineAnnotation);
}
} catch (ClassNotFoundException e) {
// ignore
}
}
}
Example 5
| Source File: FindRefComparison.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
|
private void checkRefComparison(Location location, JavaClass jclass, Method method, MethodGen methodGen,
RefComparisonTypeFrameModelingVisitor visitor, TypeDataflow typeDataflow,
List<WarningWithProperties> stringComparisonList, List<WarningWithProperties> refComparisonList)
throws DataflowAnalysisException {
InstructionHandle handle = location.getHandle();
TypeFrame frame = typeDataflow.getFactAtLocation(location);
if (frame.getStackDepth() < 2) {
throw new DataflowAnalysisException("Stack underflow", methodGen, handle);
}
int numSlots = frame.getNumSlots();
Type lhsType = frame.getValue(numSlots - 2);
Type rhsType = frame.getValue(numSlots - 1);
if (lhsType instanceof NullType || rhsType instanceof NullType) {
return;
}
if (lhsType instanceof ReferenceType && rhsType instanceof ReferenceType) {
IncompatibleTypes result = IncompatibleTypes.getPriorityForAssumingCompatible(lhsType, rhsType, true);
if (result != IncompatibleTypes.SEEMS_OK && result != IncompatibleTypes.UNCHECKED) {
String sourceFile = jclass.getSourceFileName();
boolean isAssertSame = handle.getInstruction() instanceof INVOKESTATIC;
if (isAssertSame) {
if (testingEnabled) {
bugAccumulator.accumulateBug(
new BugInstance(this, "TESTING", result.getPriority())
.addClassAndMethod(methodGen, sourceFile)
.addString("Calling assertSame with two distinct objects")
.addFoundAndExpectedType(rhsType, lhsType)
.addSomeSourceForTopTwoStackValues(classContext, method, location),
SourceLineAnnotation.fromVisitedInstruction(classContext, methodGen, sourceFile, handle));
}
} else {
bugAccumulator.accumulateBug(
new BugInstance(this, "EC_UNRELATED_TYPES_USING_POINTER_EQUALITY", result.getPriority())
.addClassAndMethod(methodGen, sourceFile).addFoundAndExpectedType(rhsType, lhsType)
.addSomeSourceForTopTwoStackValues(classContext, method, location),
SourceLineAnnotation.fromVisitedInstruction(classContext, methodGen, sourceFile, handle));
}
return;
}
if (lhsType.equals(Type.OBJECT) && rhsType.equals(Type.OBJECT)) {
return;
}
String lhs = SignatureConverter.convert(lhsType.getSignature());
String rhs = SignatureConverter.convert(rhsType.getSignature());
if (Values.DOTTED_JAVA_LANG_STRING.equals(lhs) || Values.DOTTED_JAVA_LANG_STRING.equals(rhs)) {
handleStringComparison(jclass, method, methodGen, visitor, stringComparisonList, location, lhsType, rhsType);
} else if (suspiciousSet.contains(lhs)) {
handleSuspiciousRefComparison(jclass, method, methodGen, refComparisonList, location, lhs,
(ReferenceType) lhsType, (ReferenceType) rhsType);
} else if (suspiciousSet.contains(rhs)) {
handleSuspiciousRefComparison(jclass, method, methodGen, refComparisonList, location, rhs,
(ReferenceType) lhsType, (ReferenceType) rhsType);
}
}
}
Example 6
| Source File: FindNonSerializableValuePassedToWriteObject.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
|
private void analyzeMethod(ClassContext classContext, Method method) throws CFGBuilderException, DataflowAnalysisException {
MethodGen methodGen = classContext.getMethodGen(method);
if (methodGen == null) {
return;
}
BitSet bytecodeSet = classContext.getBytecodeSet(method);
if (bytecodeSet == null) {
return;
}
// We don't adequately model instanceof interfaces yet
if (bytecodeSet.get(Const.INSTANCEOF) || bytecodeSet.get(Const.CHECKCAST)) {
return;
}
CFG cfg = classContext.getCFG(method);
TypeDataflow typeDataflow = classContext.getTypeDataflow(method);
ConstantPoolGen cpg = classContext.getConstantPoolGen();
String sourceFile = classContext.getJavaClass().getSourceFileName();
if (DEBUG) {
String methodName = methodGen.getClassName() + "." + methodGen.getName();
System.out.println("Checking " + methodName);
}
for (Iterator<Location> i = cfg.locationIterator(); i.hasNext();) {
Location location = i.next();
InstructionHandle handle = location.getHandle();
Instruction ins = handle.getInstruction();
if (!(ins instanceof InvokeInstruction)) {
continue;
}
InvokeInstruction invoke = (InvokeInstruction) ins;
String mName = invoke.getMethodName(cpg);
if (!"writeObject".equals(mName)) {
continue;
}
String cName = invoke.getClassName(cpg);
if (!"java.io.ObjectOutput".equals(cName) && !"java.io.ObjectOutputStream".equals(cName)) {
continue;
}
TypeFrame frame = typeDataflow.getFactAtLocation(location);
if (!frame.isValid()) {
// This basic block is probably dead
continue;
}
Type operandType = frame.getTopValue();
if (operandType.equals(TopType.instance())) {
// unreachable
continue;
}
if (!(operandType instanceof ReferenceType)) {
// Shouldn't happen - illegal bytecode
continue;
}
ReferenceType refType = (ReferenceType) operandType;
if (refType.equals(NullType.instance())) {
continue;
}
try {
double isSerializable = DeepSubtypeAnalysis.isDeepSerializable(refType);
if (isSerializable >= 0.9) {
continue;
}
ReferenceType problem = DeepSubtypeAnalysis.getLeastSerializableTypeComponent(refType);
double isRemote = DeepSubtypeAnalysis.isDeepRemote(refType);
if (isRemote >= 0.9) {
continue;
}
if (isSerializable < isRemote) {
isSerializable = isRemote;
}
SourceLineAnnotation sourceLineAnnotation = SourceLineAnnotation.fromVisitedInstruction(classContext,
methodGen, sourceFile, handle);
bugReporter.reportBug(new BugInstance(this, "DMI_NONSERIALIZABLE_OBJECT_WRITTEN",
isSerializable < 0.15 ? HIGH_PRIORITY : isSerializable > 0.5 ? LOW_PRIORITY : NORMAL_PRIORITY)
.addClassAndMethod(methodGen, sourceFile).addType(problem).describe(TypeAnnotation.FOUND_ROLE)
.addSourceLine(sourceLineAnnotation));
} catch (ClassNotFoundException e) {
// ignore
}
}
}
Example 7
| Source File: TypeAnalysis.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
|
@Override
protected void mergeValues(TypeFrame otherFrame, TypeFrame resultFrame, int slot) throws DataflowAnalysisException {
Type type2 = resultFrame.getValue(slot);
Type type1 = otherFrame.getValue(slot);
Type value = typeMerger.mergeTypes(type2, type1);
resultFrame.setValue(slot, value);
// Result type is exact IFF types are identical and both are exact
boolean typesAreIdentical = type1.equals(type2);
boolean bothExact = resultFrame.isExact(slot) && otherFrame.isExact(slot);
resultFrame.setExact(slot, typesAreIdentical && bothExact);
}
Example 8
| Source File: IncompatibleTypes.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
|
static public @Nonnull IncompatibleTypes getPriorityForAssumingCompatible(Type expectedType, Type actualType, boolean pointerEquality) {
if (expectedType.equals(actualType)) {
return SEEMS_OK;
}
if (!(expectedType instanceof ReferenceType)) {
return SEEMS_OK;
}
if (!(actualType instanceof ReferenceType)) {
return SEEMS_OK;
}
while (expectedType instanceof ArrayType && actualType instanceof ArrayType) {
expectedType = ((ArrayType) expectedType).getElementType();
actualType = ((ArrayType) actualType).getElementType();
}
if (expectedType instanceof BasicType ^ actualType instanceof BasicType) {
return PRIMATIVE_ARRAY_AND_OTHER_ARRAY;
}
if (expectedType instanceof BasicType && actualType instanceof BasicType) {
if (!expectedType.equals(actualType)) {
return INCOMPATIBLE_PRIMATIVE_ARRAYS;
} else {
return SEEMS_OK;
}
}
if (expectedType instanceof ArrayType) {
return getPriorityForAssumingCompatibleWithArray(actualType);
}
if (actualType instanceof ArrayType) {
return getPriorityForAssumingCompatibleWithArray(expectedType);
}
if (expectedType.equals(actualType)) {
return SEEMS_OK;
}
// For now, ignore the case where either reference is not
// of an object type. (It could be either an array or null.)
if (!(expectedType instanceof ObjectType) || !(actualType instanceof ObjectType)) {
return SEEMS_OK;
}
return getPriorityForAssumingCompatible((ObjectType) expectedType, (ObjectType) actualType, pointerEquality);
}
Example 9
| Source File: Utils.java From cacheonix-core with GNU Lesser General Public License v2.1 | 4 votes |
|
/**
* Tests whether one type is compatible with another for method
* invocation conversion. This includes assignment conversion,
* except the implicit narrowing of integer constants.
* JLS Section 5.2
* @param aSubType the type to be converted.
* @param aSuperType the converted type.
* @return true if aSubType can be converted to aSuperType.
*/
public static boolean isCompatible(Type aSubType, Type aSuperType)
{
boolean result = false;
if (aSubType.equals(aSuperType)) {
// identity conversion
result = true;
}
else if ((aSubType instanceof ReferenceType)
&& (aSuperType instanceof ReferenceType))
{
// widening reference conversion?
final ReferenceType aSubRefType = (ReferenceType) aSubType;
result = aSubRefType.isAssignmentCompatibleWith(aSuperType);
}
// widening primitive conversion?
else if (aSubType.equals(Type.BYTE)) {
result =
aSuperType.equals(Type.SHORT)
|| aSuperType.equals(Type.INT)
|| aSuperType.equals(Type.LONG)
|| aSuperType.equals(Type.FLOAT)
|| aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.SHORT)) {
result =
aSuperType.equals(Type.INT)
|| aSuperType.equals(Type.LONG)
|| aSuperType.equals(Type.FLOAT)
|| aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.INT)) {
result =
aSuperType.equals(Type.LONG)
|| aSuperType.equals(Type.FLOAT)
|| aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.LONG)) {
result =
aSuperType.equals(Type.FLOAT) || aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.DOUBLE)) {
result = aSuperType.equals(Type.DOUBLE);
}
return result;
}
Example 10
| Source File: Utils.java From contribution with GNU Lesser General Public License v2.1 | 4 votes |
|
/**
* Tests whether one type is compatible with another for method
* invocation conversion. This includes assignment conversion,
* except the implicit narrowing of integer constants.
* JLS Section 5.2
* @param aSubType the type to be converted.
* @param aSuperType the converted type.
* @return true if aSubType can be converted to aSuperType.
*/
public static boolean isCompatible(Type aSubType, Type aSuperType)
{
boolean result = false;
if (aSubType.equals(aSuperType)) {
// identity conversion
result = true;
}
else if ((aSubType instanceof ReferenceType)
&& (aSuperType instanceof ReferenceType))
{
// widening reference conversion?
final ReferenceType aSubRefType = (ReferenceType) aSubType;
result = aSubRefType.isAssignmentCompatibleWith(aSuperType);
}
// widening primitive conversion?
else if (aSubType.equals(Type.BYTE)) {
result =
aSuperType.equals(Type.SHORT)
|| aSuperType.equals(Type.INT)
|| aSuperType.equals(Type.LONG)
|| aSuperType.equals(Type.FLOAT)
|| aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.SHORT)) {
result =
aSuperType.equals(Type.INT)
|| aSuperType.equals(Type.LONG)
|| aSuperType.equals(Type.FLOAT)
|| aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.INT)) {
result =
aSuperType.equals(Type.LONG)
|| aSuperType.equals(Type.FLOAT)
|| aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.LONG)) {
result =
aSuperType.equals(Type.FLOAT) || aSuperType.equals(Type.DOUBLE);
}
else if (aSubType.equals(Type.DOUBLE)) {
result = aSuperType.equals(Type.DOUBLE);
}
return result;
}
Example 11
| Source File: Pass2Verifier.java From commons-bcel with Apache License 2.0 | 4 votes |
|
@Override
public void visitConstantValue(final ConstantValue obj) {//vmspec2 4.7.2
// Despite its name, this really is an Attribute,
// not a constant!
checkIndex(obj, obj.getNameIndex(), CONST_Utf8);
final String name = ((ConstantUtf8) cp.getConstant(obj.getNameIndex())).getBytes();
if (! name.equals("ConstantValue")) {
throw new ClassConstraintException(
"The ConstantValue attribute '"+tostring(obj)+"' is not correctly named 'ConstantValue' but '"+name+"'.");
}
final Object pred = carrier.predecessor();
if (pred instanceof Field) { //ConstantValue attributes are quite senseless if the predecessor is not a field.
final Field f = (Field) pred;
// Field constraints have been checked before -- so we are safe using their type information.
final Type field_type = Type.getType(((ConstantUtf8) (cp.getConstant(f.getSignatureIndex()))).getBytes());
final int index = obj.getConstantValueIndex();
if ((index < 0) || (index >= cplen)) {
throw new ClassConstraintException("Invalid index '"+index+"' used by '"+tostring(obj)+"'.");
}
final Constant c = cp.getConstant(index);
if (CONST_Long.isInstance(c) && field_type.equals(Type.LONG)) {
return;
}
if (CONST_Float.isInstance(c) && field_type.equals(Type.FLOAT)) {
return;
}
if (CONST_Double.isInstance(c) && field_type.equals(Type.DOUBLE)) {
return;
}
if (CONST_Integer.isInstance(c) && (field_type.equals(Type.INT) || field_type.equals(Type.SHORT) ||
field_type.equals(Type.CHAR) || field_type.equals(Type.BYTE) || field_type.equals(Type.BOOLEAN))) {
return;
}
if (CONST_String.isInstance(c) && field_type.equals(Type.STRING)) {
return;
}
throw new ClassConstraintException("Illegal type of ConstantValue '"+obj+"' embedding Constant '"+c+
"'. It is referenced by field '"+tostring(f)+"' expecting a different type: '"+field_type+"'.");
}
}
