/**
* Find or create an interface method signature for the given method reference.
*
* @param ref A reference to a supposed interface method
* @return the interface method signature
*/
public static synchronized InterfaceMethodSignature findOrCreate(MemberReference ref) {
InterfaceMethodSignature key =
new InterfaceMethodSignature(ref.getName(), ref.getDescriptor(), nextId + 1);
InterfaceMethodSignature val = dictionary.get(key);
if (val != null) return val;
nextId++;
dictionary.add(key);
return key;
}
/** Find the value for an annotation */
private Object getElementValue(String name, Class<?> valueType) {
for (AnnotationMember evp : elementValuePairs) {
String evpFieldName = evp.getName().toString();
if (name.equals(evpFieldName)) {
return evp.getValue();
}
}
MethodReference methRef =
MemberReference.findOrCreate(
type,
Atom.findOrCreateAsciiAtom(name),
Atom.findOrCreateAsciiAtom("()" + TypeReference.findOrCreate(valueType).getName()))
.asMethodReference();
try {
return methRef.resolve().getAnnotationDefault();
} catch (Throwable t) {
return NO_VALUE;
}
}
/**
* Read the pair from the input stream and create object
*
* @param constantPool the constant pool for the class being read
* @param input stream to read from
* @param classLoader the class loader being used to load this annotation
* @return a newly created annotation member
*/
static AnnotationMember readAnnotationMember(
TypeReference type, int[] constantPool, DataInputStream input, ClassLoader classLoader)
throws IOException, ClassNotFoundException {
// Read name of pair
int elemNameIndex = input.readUnsignedShort();
Atom name = RVMClass.getUtf(constantPool, elemNameIndex);
MethodReference meth;
Object value;
if (type.isResolved()) {
meth = type.resolve().asClass().findDeclaredMethod(name).getMemberRef().asMethodReference();
value = RVMAnnotation.readValue(meth.getReturnType(), constantPool, input, classLoader);
} else {
value = RVMAnnotation.readValue(null, constantPool, input, classLoader);
meth =
MemberReference.findOrCreate(
type,
name,
Atom.findOrCreateAsciiAtom(
"()" + TypeReference.findOrCreate(value.getClass()).getName()))
.asMethodReference();
}
return new AnnotationMember(meth, value);
}
/**
* Create a method for reflectively invoking this method
*
* @param reflectionClass the class this method will belong to
* @param constantPool for the class
* @param memRef the member reference corresponding to this method
* @return the created method
*/
RVMMethod createReflectionMethod(
TypeReference reflectionClass, int[] constantPool, MethodReference memRef) {
TypeReference[] parameters = getParameterTypes();
int numParams = parameters.length;
byte[] bytecodes;
boolean interfaceCall = false;
int curBC = 0;
if (!isStatic()) {
if (!getDeclaringClass().isInterface()) {
// virtual call
bytecodes = new byte[8 * numParams + 8];
} else {
// interface call
bytecodes = new byte[8 * numParams + 10];
interfaceCall = true;
}
bytecodes[curBC] = JBC_aload_1;
curBC++;
} else {
// static call
bytecodes = new byte[8 * numParams + 7];
}
for (int i = 0; i < numParams; i++) {
if (parameters[i].isVoidType()) {
bytecodes[curBC] =
bytecodes[curBC + 1] =
bytecodes[curBC + 2] =
bytecodes[curBC + 3] =
bytecodes[curBC + 4] =
bytecodes[curBC + 5] =
bytecodes[curBC + 6] = bytecodes[curBC + 7] = (byte) JBC_nop;
continue;
}
bytecodes[curBC] = (byte) JBC_aload_2;
bytecodes[curBC + 1] = (byte) JBC_sipush;
bytecodes[curBC + 2] = (byte) (i >>> 8);
bytecodes[curBC + 3] = (byte) i;
bytecodes[curBC + 4] = (byte) JBC_aaload;
if (!parameters[i].isPrimitiveType()) {
bytecodes[curBC + 5] = (byte) JBC_checkcast;
if (VM.VerifyAssertions) VM._assert(parameters[i].getId() != 0);
constantPool[i + 1] = ClassFileReader.packCPEntry(CP_CLASS, parameters[i].getId());
bytecodes[curBC + 6] = (byte) ((i + 1) >>> 8);
bytecodes[curBC + 7] = (byte) (i + 1);
} else if (parameters[i].isWordLikeType()) {
bytecodes[curBC + 5] = bytecodes[curBC + 6] = bytecodes[curBC + 7] = (byte) JBC_nop;
} else {
bytecodes[curBC + 5] = (byte) JBC_invokestatic;
MemberReference unboxMethod;
if (parameters[i].isBooleanType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsBoolean"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)Z"));
} else if (parameters[i].isByteType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsByte"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)B"));
} else if (parameters[i].isShortType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsShort"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)S"));
} else if (parameters[i].isCharType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsChar"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)C"));
} else if (parameters[i].isIntType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsInt"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)I"));
} else if (parameters[i].isLongType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsLong"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)J"));
} else if (parameters[i].isFloatType()) {
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsFloat"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)F"));
} else {
if (VM.VerifyAssertions) VM._assert(parameters[i].isDoubleType());
unboxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("unboxAsDouble"),
Atom.findOrCreateUnicodeAtom("(Ljava/lang/Object;)D"));
}
constantPool[i + 1] = ClassFileReader.packCPEntry(CP_MEMBER, unboxMethod.getId());
bytecodes[curBC + 6] = (byte) ((i + 1) >>> 8);
bytecodes[curBC + 7] = (byte) (i + 1);
}
curBC += 8;
}
if (isStatic()) {
bytecodes[curBC] = (byte) JBC_invokestatic;
} else if (isObjectInitializer() || isPrivate()) {
bytecodes[curBC] = (byte) JBC_invokespecial;
} else if (interfaceCall) {
bytecodes[curBC] = (byte) JBC_invokeinterface;
} else {
bytecodes[curBC] = (byte) JBC_invokevirtual;
}
constantPool[numParams + 1] = ClassFileReader.packCPEntry(CP_MEMBER, getId());
bytecodes[curBC + 1] = (byte) ((numParams + 1) >>> 8);
bytecodes[curBC + 2] = (byte) (numParams + 1);
if (interfaceCall) {
// invokeinterface bytecodes are historically longer than others
curBC += 2;
}
TypeReference returnType = getReturnType();
if (!returnType.isPrimitiveType() || returnType.isWordLikeType()) {
bytecodes[curBC + 3] = (byte) JBC_nop;
bytecodes[curBC + 4] = (byte) JBC_nop;
bytecodes[curBC + 5] = (byte) JBC_nop;
} else if (returnType.isVoidType()) {
bytecodes[curBC + 3] = (byte) JBC_aconst_null;
bytecodes[curBC + 4] = (byte) JBC_nop;
bytecodes[curBC + 5] = (byte) JBC_nop;
} else {
MemberReference boxMethod;
if (returnType.isBooleanType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsBoolean"),
Atom.findOrCreateUnicodeAtom("(Z)Ljava/lang/Object;"));
} else if (returnType.isByteType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsByte"),
Atom.findOrCreateUnicodeAtom("(B)Ljava/lang/Object;"));
} else if (returnType.isShortType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsShort"),
Atom.findOrCreateUnicodeAtom("(S)Ljava/lang/Object;"));
} else if (returnType.isCharType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsChar"),
Atom.findOrCreateUnicodeAtom("(C)Ljava/lang/Object;"));
} else if (returnType.isIntType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsInt"),
Atom.findOrCreateUnicodeAtom("(I)Ljava/lang/Object;"));
} else if (returnType.isLongType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsLong"),
Atom.findOrCreateUnicodeAtom("(J)Ljava/lang/Object;"));
} else if (returnType.isFloatType()) {
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsFloat"),
Atom.findOrCreateUnicodeAtom("(F)Ljava/lang/Object;"));
} else {
if (VM.VerifyAssertions) VM._assert(returnType.isDoubleType());
boxMethod =
MethodReference.findOrCreate(
baseReflectionClass,
Atom.findOrCreateUnicodeAtom("boxAsDouble"),
Atom.findOrCreateUnicodeAtom("(D)Ljava/lang/Object;"));
}
constantPool[numParams + 2] = ClassFileReader.packCPEntry(CP_MEMBER, boxMethod.getId());
bytecodes[curBC + 3] = (byte) JBC_invokestatic;
bytecodes[curBC + 4] = (byte) ((numParams + 2) >>> 8);
bytecodes[curBC + 5] = (byte) (numParams + 2);
}
bytecodes[curBC + 6] = (byte) JBC_areturn;
return new NormalMethod(
reflectionClass,
memRef,
(short) (ACC_PUBLIC | ACC_FINAL | ACC_SYNTHETIC),
null,
(short) 3,
(short) (getParameterWords() + 2),
bytecodes,
null,
null,
null,
constantPool,
null,
null,
null,
null);
}
/**
* Called from {@link ClassFileReader#readClass(TypeReference,DataInputStream)} to create an
* instance of a RVMMethod by reading the relevant data from the argument bytecode stream.
*
* @param declaringClass the TypeReference of the class being loaded
* @param constantPool the constantPool of the RVMClass object that's being constructed
* @param memRef the canonical memberReference for this member.
* @param modifiers modifiers associated with this member.
* @param input the DataInputStream to read the method's attributes from
*/
static RVMMethod readMethod(
TypeReference declaringClass,
int[] constantPool,
MemberReference memRef,
short modifiers,
DataInputStream input)
throws IOException {
short tmp_localWords = 0;
short tmp_operandWords = 0;
byte[] tmp_bytecodes = null;
ExceptionHandlerMap tmp_exceptionHandlerMap = null;
TypeReference[] tmp_exceptionTypes = null;
int[] tmp_lineNumberMap = null;
LocalVariableTable tmp_localVariableTable = null;
Atom tmp_signature = null;
RVMAnnotation[] annotations = null;
RVMAnnotation[][] parameterAnnotations = null;
Object tmp_annotationDefault = null;
// Read the attributes
for (int i = 0, n = input.readUnsignedShort(); i < n; i++) {
Atom attName = ClassFileReader.getUtf(constantPool, input.readUnsignedShort());
int attLength = input.readInt();
// Only bother to interpret non-boring Method attributes
if (attName == RVMClassLoader.codeAttributeName) {
tmp_operandWords = input.readShort();
tmp_localWords = input.readShort();
tmp_bytecodes = new byte[input.readInt()];
input.readFully(tmp_bytecodes);
tmp_exceptionHandlerMap = ExceptionHandlerMap.readExceptionHandlerMap(input, constantPool);
// Read the attributes portion of the code attribute
for (int j = 0, n2 = input.readUnsignedShort(); j < n2; j++) {
attName = ClassFileReader.getUtf(constantPool, input.readUnsignedShort());
attLength = input.readInt();
if (attName == RVMClassLoader.lineNumberTableAttributeName) {
int cnt = input.readUnsignedShort();
if (cnt != 0) {
tmp_lineNumberMap = new int[cnt];
for (int k = 0; k < cnt; k++) {
int startPC = input.readUnsignedShort();
int lineNumber = input.readUnsignedShort();
tmp_lineNumberMap[k] = (lineNumber << BITS_IN_SHORT) | startPC;
}
}
} else if (attName == RVMClassLoader.localVariableTableAttributeName) {
tmp_localVariableTable = LocalVariableTable.readLocalVariableTable(input, constantPool);
} else {
// All other entries in the attribute portion of the code attribute are boring.
int skippedAmount = input.skipBytes(attLength);
if (skippedAmount != attLength) {
throw new IOException("Unexpected short skip");
}
}
}
} else if (attName == RVMClassLoader.exceptionsAttributeName) {
int cnt = input.readUnsignedShort();
if (cnt != 0) {
tmp_exceptionTypes = new TypeReference[cnt];
for (int j = 0, m = tmp_exceptionTypes.length; j < m; ++j) {
tmp_exceptionTypes[j] =
ClassFileReader.getTypeRef(constantPool, input.readUnsignedShort());
}
}
} else if (attName == RVMClassLoader.syntheticAttributeName) {
modifiers |= ACC_SYNTHETIC;
} else if (attName == RVMClassLoader.signatureAttributeName) {
tmp_signature = ClassFileReader.getUtf(constantPool, input.readUnsignedShort());
} else if (attName == RVMClassLoader.runtimeVisibleAnnotationsAttributeName) {
annotations =
AnnotatedElement.readAnnotations(constantPool, input, declaringClass.getClassLoader());
} else if (attName == RVMClassLoader.runtimeVisibleParameterAnnotationsAttributeName) {
int numParameters = input.readByte() & 0xFF;
parameterAnnotations = new RVMAnnotation[numParameters][];
for (int a = 0; a < numParameters; ++a) {
parameterAnnotations[a] =
AnnotatedElement.readAnnotations(
constantPool, input, declaringClass.getClassLoader());
}
} else if (attName == RVMClassLoader.annotationDefaultAttributeName) {
try {
tmp_annotationDefault =
RVMAnnotation.readValue(
memRef.asMethodReference().getReturnType(),
constantPool,
input,
declaringClass.getClassLoader());
} catch (ClassNotFoundException e) {
throw new Error(e);
}
} else {
// all other method attributes are boring
int skippedAmount = input.skipBytes(attLength);
if (skippedAmount != attLength) {
throw new IOException("Unexpected short skip");
}
}
}
RVMMethod method;
if ((modifiers & ACC_NATIVE) != 0) {
method =
new NativeMethod(
declaringClass,
memRef,
modifiers,
tmp_exceptionTypes,
tmp_signature,
annotations,
parameterAnnotations,
tmp_annotationDefault);
} else if ((modifiers & ACC_ABSTRACT) != 0) {
method =
new AbstractMethod(
declaringClass,
memRef,
modifiers,
tmp_exceptionTypes,
tmp_signature,
annotations,
parameterAnnotations,
tmp_annotationDefault);
} else {
method =
new NormalMethod(
declaringClass,
memRef,
modifiers,
tmp_exceptionTypes,
tmp_localWords,
tmp_operandWords,
tmp_bytecodes,
tmp_exceptionHandlerMap,
tmp_lineNumberMap,
tmp_localVariableTable,
constantPool,
tmp_signature,
annotations,
parameterAnnotations,
tmp_annotationDefault);
}
return method;
}
