/**
* Lookup a class. <em>Use this method instead of Repository.lookupClass().</em>
*
* @param className the name of the class
* @return the JavaClass representing the class
* @throws ClassNotFoundException (but not really)
*/
public JavaClass lookupClass(@Nonnull @DottedClassName String className)
throws ClassNotFoundException {
try {
if (className.length() == 0) {
throw new IllegalArgumentException("Class name is empty");
}
if (!ClassName.isValidClassName(className)) {
throw new ClassNotFoundException("Invalid class name: " + className);
}
return Global.getAnalysisCache()
.getClassAnalysis(
JavaClass.class,
DescriptorFactory.instance()
.getClassDescriptor(ClassName.toSlashedClassName(className)));
} catch (CheckedAnalysisException e) {
throw new ClassNotFoundException("Class not found: " + className, e);
}
}
/**
* Get the ClassContext for a class.
*
* @param javaClass the class
* @return the ClassContext for that class
*/
public ClassContext getClassContext(JavaClass javaClass) {
// This is a bit silly since we're doing an unnecessary
// ClassDescriptor->JavaClass lookup.
// However, we can be assured that it will succeed.
ClassDescriptor classDescriptor =
DescriptorFactory.instance()
.getClassDescriptor(ClassName.toSlashedClassName(javaClass.getClassName()));
try {
return Global.getAnalysisCache().getClassAnalysis(ClassContext.class, classDescriptor);
} catch (CheckedAnalysisException e) {
IllegalStateException ise =
new IllegalStateException("Could not get ClassContext for JavaClass");
ise.initCause(e);
throw ise;
}
}
private static String getFullMethodName(ConstantPoolGen cpg, InvokeInstruction invoke) {
String dottedClassName = invoke.getReferenceType(cpg).toString();
StringBuilder builder = new StringBuilder(ClassName.toSlashedClassName(dottedClassName));
builder.append(".").append(invoke.getMethodName(cpg)).append(invoke.getSignature(cpg));
return builder.toString();
}
/**
* Construct a ClassDescriptor from a JavaClass.
*
* @param jclass a JavaClass
* @return a ClassDescriptor identifying that JavaClass
*/
public static ClassDescriptor getClassDescriptor(JavaClass jclass) {
return DescriptorFactory.instance()
.getClassDescriptor(ClassName.toSlashedClassName(jclass.getClassName()));
}
private String getClassName(JavaClass c, int classIndex) {
String name = c.getConstantPool().getConstantString(classIndex, CONSTANT_Class);
return ClassName.extractClassName(name).replace('/', '.');
}
private String getSlashedClassName(FieldOrMethod obj) {
String className = obj.getReferenceType(cpg).toString();
return ClassName.toSlashedClassName(className);
}
private void handle(@SlashedClassName String className, boolean isFloatingPoint, String sig) {
XMethod m =
XFactory.createXMethod(ClassName.toDottedClassName(className), "valueOf", sig, true);
boxClasses.put(className, m);
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.classfile.engine.ClassParserInterface#parse(edu.umd
* .cs.findbugs.classfile.analysis.ClassNameAndSuperclassInfo.Builder)
*/
public void parse(final ClassNameAndSuperclassInfo.Builder cBuilder)
throws InvalidClassFileFormatException {
cBuilder.setCodeBaseEntry(codeBaseEntry);
final TreeSet<ClassDescriptor> calledClassSet = new TreeSet<ClassDescriptor>();
classReader.accept(
new ClassVisitor() {
boolean isInnerClass = false;
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
ClassParserUsingASM.this.slashedClassName = name;
cBuilder.setClassfileVersion(version >>> 16, version & 0xffff);
cBuilder.setAccessFlags(access);
cBuilder.setClassDescriptor(DescriptorFactory.createClassDescriptor(name));
cBuilder.setInterfaceDescriptorList(
DescriptorFactory.createClassDescriptor(interfaces));
if (superName != null)
cBuilder.setSuperclassDescriptor(DescriptorFactory.createClassDescriptor(superName));
if (cBuilder instanceof ClassInfo.Builder) {
((ClassInfo.Builder) cBuilder).setSourceSignature(signature);
}
}
public org.objectweb.asm.AnnotationVisitor visitAnnotation(
String desc, boolean isVisible) {
if (cBuilder instanceof ClassInfo.Builder) {
AnnotationValue value = new AnnotationValue(desc);
((ClassInfo.Builder) cBuilder).addAnnotation(desc, value);
return value.getAnnotationVisitor();
}
return null;
}
public void visitAttribute(Attribute arg0) {
// TODO Auto-generated method stub
}
public void visitEnd() {
// TODO Auto-generated method stub
}
public FieldVisitor visitField(
int access, String name, String desc, String signature, Object value) {
if (name.equals("this$0")) isInnerClass = true;
if (desc == null) throw new NullPointerException("Description cannot be null");
if (cBuilder instanceof ClassInfo.Builder) {
final ClassInfo.Builder cBuilder2 = (ClassInfo.Builder) cBuilder;
if ((access & Opcodes.ACC_VOLATILE) != 0 || desc.contains("util/concurrent"))
cBuilder2.setUsesConcurrency();
final FieldInfo.Builder fBuilder =
new FieldInfo.Builder(slashedClassName, name, desc, access);
fBuilder.setSourceSignature(signature);
return new AbstractFieldAnnotationVisitor() {
public org.objectweb.asm.AnnotationVisitor visitAnnotation(
final String desc, boolean visible) {
AnnotationValue value = new AnnotationValue(desc);
fBuilder.addAnnotation(desc, value);
return value.getAnnotationVisitor();
}
public void visitEnd() {
cBuilder2.addFieldDescriptor(fBuilder.build());
}
};
}
return null;
}
public void visitInnerClass(String name, String outerName, String innerName, int access) {
if (name.equals(slashedClassName) && outerName != null) {
if (cBuilder instanceof ClassInfo.Builder) {
ClassDescriptor outerClassDescriptor =
DescriptorFactory.createClassDescriptor(outerName);
((ClassInfo.Builder) cBuilder).setImmediateEnclosingClass(outerClassDescriptor);
((ClassInfo.Builder) cBuilder).setAccessFlags(access);
}
}
}
public MethodVisitor visitMethod(
final int access,
final String methodName,
final String methodDesc,
String signature,
String[] exceptions) {
if (cBuilder instanceof ClassInfo.Builder) {
final MethodInfo.Builder mBuilder =
new MethodInfo.Builder(slashedClassName, methodName, methodDesc, access);
mBuilder.setSourceSignature(signature);
mBuilder.setThrownExceptions(exceptions);
if ((access & Opcodes.ACC_SYNCHRONIZED) != 0) mBuilder.setUsesConcurrency();
return new AbstractMethodVisitor() {
int variable;
boolean sawReturn = (access & Opcodes.ACC_NATIVE) != 0;
boolean sawNormalThrow = false;
boolean sawUnsupportedThrow = false;
boolean sawSystemExit = false;
boolean sawBranch = false;
boolean sawBackBranch = false;
int methodCallCount = 0;
boolean sawStubThrow = false;
boolean justSawInitializationOfUnsupportedOperationException;
boolean isBridge =
(access & Opcodes.ACC_SYNTHETIC) != 0 && (access & Opcodes.ACC_BRIDGE) != 0;
String bridgedMethodSignature;
State state = State.INITIAL;
StubState stubState = StubState.INITIAL;
boolean isAccessMethod = methodName.startsWith("access$");
String accessOwner, accessName, accessDesc;
boolean accessIsStatic;
HashSet<Label> labelsSeen = new HashSet<Label>();
@Override
public void visitLdcInsn(Object cst) {
if (cst.equals("Stub!")) stubState = StubState.LOADED_STUB;
else stubState = StubState.INITIAL;
}
@Override
public void visitInsn(int opcode) {
if (opcode == Opcodes.MONITORENTER) mBuilder.setUsesConcurrency();
if (RETURN_OPCODE_SET.get(opcode)) sawReturn = true;
else if (opcode == Opcodes.ATHROW) {
if (stubState == StubState.INITIALIZE_RUNTIME) {
sawStubThrow = true;
} else if (justSawInitializationOfUnsupportedOperationException)
sawUnsupportedThrow = true;
else sawNormalThrow = true;
}
resetState();
}
public void resetState() {
if (state != State.AFTER_METHOD_CALL) state = State.INITIAL;
stubState = StubState.INITIAL;
}
@Override
public void visitSomeInsn() {
resetState();
}
@Override
public void visitVarInsn(int opcode, int var) {
if (opcode == Opcodes.ALOAD && var == 0) state = State.THIS_LOADED;
else if (state == State.THIS_LOADED)
switch (opcode) {
case Opcodes.ALOAD:
case Opcodes.ILOAD:
case Opcodes.LLOAD:
case Opcodes.DLOAD:
case Opcodes.FLOAD:
state = State.VARIABLE_LOADED;
variable = var;
}
else visitSomeInsn();
}
public org.objectweb.asm.AnnotationVisitor visitAnnotation(
final String desc, boolean visible) {
AnnotationValue value = new AnnotationValue(desc);
mBuilder.addAnnotation(desc, value);
return value.getAnnotationVisitor();
}
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc) {
methodCallCount++;
if (isAccessMethod && methodCallCount == 1) {
this.accessOwner = owner;
this.accessName = name;
this.accessDesc = desc;
this.accessIsStatic = opcode == Opcodes.INVOKESTATIC;
}
if (stubState == StubState.LOADED_STUB
&& opcode == Opcodes.INVOKESPECIAL
&& owner.equals("java/lang/RuntimeException")
&& name.equals("<init>")) stubState = StubState.INITIALIZE_RUNTIME;
else stubState = StubState.INITIAL;
if (owner.startsWith("java/util/concurrent")) mBuilder.setUsesConcurrency();
if (opcode == Opcodes.INVOKEINTERFACE) return;
if (owner.charAt(0) == '[' && owner.charAt(owner.length() - 1) != ';') {
// primitive array
return;
}
if (opcode == Opcodes.INVOKESTATIC
&& owner.equals("java/lang/System")
&& name.equals("exit")
&& !sawReturn) sawSystemExit = true;
justSawInitializationOfUnsupportedOperationException =
opcode == Opcodes.INVOKESPECIAL
&& owner.equals("java/lang/UnsupportedOperationException")
&& name.equals("<init>");
if (isBridge && bridgedMethodSignature == null)
switch (opcode) {
case Opcodes.INVOKEVIRTUAL:
case Opcodes.INVOKESPECIAL:
case Opcodes.INVOKESTATIC:
case Opcodes.INVOKEINTERFACE:
if (desc != null && name.equals(methodName)) bridgedMethodSignature = desc;
}
// System.out.println("Call from " +
// ClassParserUsingASM.this.slashedClassName +
// " to " + owner + " : " + desc);
if (desc == null || desc.indexOf('[') == -1 && desc.indexOf('L') == -1) return;
if (ClassParserUsingASM.this.slashedClassName.equals(owner)) return;
ClassDescriptor classDescriptor =
DescriptorFactory.instance().getClassDescriptor(owner);
calledClassSet.add(classDescriptor);
// System.out.println("Added call from " +
// ClassParserUsingASM.this.slashedClassName +
// " to " + owner);
state = State.AFTER_METHOD_CALL;
}
@Override
public void visitJumpInsn(int opcode, Label label) {
sawBranch = true;
if (labelsSeen.contains(label)) sawBackBranch = true;
super.visitJumpInsn(opcode, label);
}
@Override
public void visitLabel(Label label) {
labelsSeen.add(label);
super.visitLabel(label);
}
public void visitEnd() {
labelsSeen.clear();
if (isAccessMethod && methodCallCount == 1) {
mBuilder.setAccessMethodFor(
accessOwner, accessName, accessDesc, accessIsStatic);
}
if (sawBackBranch) mBuilder.setHasBackBranch();
boolean sawThrow = sawNormalThrow | sawUnsupportedThrow | sawStubThrow;
if (sawThrow && !sawReturn || sawSystemExit && !sawBranch) {
mBuilder.setIsUnconditionalThrower();
if (!sawReturn && !sawNormalThrow) {
if (sawUnsupportedThrow) mBuilder.setUnsupported();
if (sawStubThrow) {
mBuilder.addAccessFlags(Constants.ACC_SYNTHETIC);
mBuilder.setIsStub();
}
}
// else
// System.out.println(slashedClassName+"."+methodName+methodDesc
// + " is thrower");
}
mBuilder.setNumberMethodCalls(methodCallCount);
MethodInfo methodInfo = mBuilder.build();
Builder classBuilder = (ClassInfo.Builder) cBuilder;
if (isBridge
&& bridgedMethodSignature != null
&& !bridgedMethodSignature.equals(methodDesc))
classBuilder.addBridgeMethodDescriptor(methodInfo, bridgedMethodSignature);
else classBuilder.addMethodDescriptor(methodInfo);
if (methodInfo.usesConcurrency()) classBuilder.setUsesConcurrency();
if (methodInfo.isStub()) classBuilder.setHasStubs();
}
public org.objectweb.asm.AnnotationVisitor visitParameterAnnotation(
int parameter, String desc, boolean visible) {
AnnotationValue value = new AnnotationValue(desc);
mBuilder.addParameterAnnotation(parameter, desc, value);
return value.getAnnotationVisitor();
}
};
}
return null;
}
public void visitOuterClass(String owner, String name, String desc) {}
public void visitSource(String arg0, String arg1) {
if (cBuilder instanceof ClassInfo.Builder) {
((ClassInfo.Builder) cBuilder).setSource(arg0);
}
}
},
ClassReader.SKIP_FRAMES);
HashSet<ClassDescriptor> referencedClassSet = new HashSet<ClassDescriptor>();
// collect class references
int constantPoolCount = classReader.readUnsignedShort(8);
int offset = 10;
char[] buf = new char[1024];
// System.out.println("constant pool count: " + constantPoolCount);
for (int count = 1; count < constantPoolCount; count++) {
int tag = classReader.readByte(offset);
int size;
switch (tag) {
case Constants.CONSTANT_Methodref:
case Constants.CONSTANT_InterfaceMethodref:
case Constants.CONSTANT_Fieldref:
case Constants.CONSTANT_Integer:
case Constants.CONSTANT_Float:
case Constants.CONSTANT_NameAndType:
size = 5;
break;
case Constants.CONSTANT_Long:
case Constants.CONSTANT_Double:
size = 9;
count++;
break;
case Constants.CONSTANT_Utf8:
size = 3 + classReader.readUnsignedShort(offset + 1);
break;
case Constants.CONSTANT_Class:
@SlashedClassName String className = classReader.readUTF8(offset + 1, buf);
if (className.indexOf('[') >= 0) {
ClassParser.extractReferencedClassesFromSignature(referencedClassSet, className);
} else if (ClassName.isValidClassName(className)) {
ClassDescriptor classDescriptor =
DescriptorFactory.instance().getClassDescriptor(className);
referencedClassSet.add(classDescriptor);
}
size = 3;
break;
// case ClassWriter.CLASS:
// case ClassWriter.STR:
case Constants.CONSTANT_String:
size = 3;
break;
default:
throw new IllegalStateException(
"Unexpected tag of "
+ tag
+ " at offset "
+ offset
+ " while parsing "
+ slashedClassName
+ " from "
+ codeBaseEntry);
}
// System.out.println(count + "@" + offset + " : [" + tag
// +"] size="+size);
offset += size;
}
cBuilder.setCalledClassDescriptors(calledClassSet);
cBuilder.setReferencedClassDescriptors(referencedClassSet);
}
