| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.lang.invoke; |
| |
| import jdk.internal.org.objectweb.asm.*; |
| import sun.invoke.util.BytecodeDescriptor; |
| import jdk.internal.misc.Unsafe; |
| import sun.security.action.GetPropertyAction; |
| |
| import java.io.FilePermission; |
| import java.io.Serializable; |
| import java.lang.reflect.Constructor; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.LinkedHashSet; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.PropertyPermission; |
| import java.util.Set; |
| |
| import static jdk.internal.org.objectweb.asm.Opcodes.*; |
| |
| /** |
| * Lambda metafactory implementation which dynamically creates an |
| * inner-class-like class per lambda callsite. |
| * |
| * @see LambdaMetafactory |
| */ |
| /* package */ final class InnerClassLambdaMetafactory extends AbstractValidatingLambdaMetafactory { |
| private static final Unsafe UNSAFE = Unsafe.getUnsafe(); |
| |
| private static final int CLASSFILE_VERSION = 52; |
| private static final String METHOD_DESCRIPTOR_VOID = Type.getMethodDescriptor(Type.VOID_TYPE); |
| private static final String JAVA_LANG_OBJECT = "java/lang/Object"; |
| private static final String NAME_CTOR = "<init>"; |
| private static final String NAME_FACTORY = "get$Lambda"; |
| |
| //Serialization support |
| private static final String NAME_SERIALIZED_LAMBDA = "java/lang/invoke/SerializedLambda"; |
| private static final String NAME_NOT_SERIALIZABLE_EXCEPTION = "java/io/NotSerializableException"; |
| private static final String DESCR_METHOD_WRITE_REPLACE = "()Ljava/lang/Object;"; |
| private static final String DESCR_METHOD_WRITE_OBJECT = "(Ljava/io/ObjectOutputStream;)V"; |
| private static final String DESCR_METHOD_READ_OBJECT = "(Ljava/io/ObjectInputStream;)V"; |
| private static final String NAME_METHOD_WRITE_REPLACE = "writeReplace"; |
| private static final String NAME_METHOD_READ_OBJECT = "readObject"; |
| private static final String NAME_METHOD_WRITE_OBJECT = "writeObject"; |
| |
| private static final String DESCR_CLASS = "Ljava/lang/Class;"; |
| private static final String DESCR_STRING = "Ljava/lang/String;"; |
| private static final String DESCR_OBJECT = "Ljava/lang/Object;"; |
| private static final String DESCR_CTOR_SERIALIZED_LAMBDA |
| = "(" + DESCR_CLASS + DESCR_STRING + DESCR_STRING + DESCR_STRING + "I" |
| + DESCR_STRING + DESCR_STRING + DESCR_STRING + DESCR_STRING + "[" + DESCR_OBJECT + ")V"; |
| |
| private static final String DESCR_CTOR_NOT_SERIALIZABLE_EXCEPTION = "(Ljava/lang/String;)V"; |
| private static final String[] SER_HOSTILE_EXCEPTIONS = new String[] {NAME_NOT_SERIALIZABLE_EXCEPTION}; |
| |
| |
| private static final String[] EMPTY_STRING_ARRAY = new String[0]; |
| |
| // Used to ensure that each spun class name is unique |
| private static final AtomicInteger counter = new AtomicInteger(0); |
| |
| // For dumping generated classes to disk, for debugging purposes |
| private static final ProxyClassesDumper dumper; |
| |
| static { |
| final String key = "jdk.internal.lambda.dumpProxyClasses"; |
| String path = GetPropertyAction.getProperty(key); |
| dumper = (null == path) ? null : ProxyClassesDumper.getInstance(path); |
| } |
| |
| // See context values in AbstractValidatingLambdaMetafactory |
| private final String implMethodClassName; // Name of type containing implementation "CC" |
| private final String implMethodName; // Name of implementation method "impl" |
| private final String implMethodDesc; // Type descriptor for implementation methods "(I)Ljava/lang/String;" |
| private final Class<?> implMethodReturnClass; // class for implementation method return type "Ljava/lang/String;" |
| private final MethodType constructorType; // Generated class constructor type "(CC)void" |
| private final ClassWriter cw; // ASM class writer |
| private final String[] argNames; // Generated names for the constructor arguments |
| private final String[] argDescs; // Type descriptors for the constructor arguments |
| private final String lambdaClassName; // Generated name for the generated class "X$$Lambda$1" |
| |
| /** |
| * General meta-factory constructor, supporting both standard cases and |
| * allowing for uncommon options such as serialization or bridging. |
| * |
| * @param caller Stacked automatically by VM; represents a lookup context |
| * with the accessibility privileges of the caller. |
| * @param invokedType Stacked automatically by VM; the signature of the |
| * invoked method, which includes the expected static |
| * type of the returned lambda object, and the static |
| * types of the captured arguments for the lambda. In |
| * the event that the implementation method is an |
| * instance method, the first argument in the invocation |
| * signature will correspond to the receiver. |
| * @param samMethodName Name of the method in the functional interface to |
| * which the lambda or method reference is being |
| * converted, represented as a String. |
| * @param samMethodType Type of the method in the functional interface to |
| * which the lambda or method reference is being |
| * converted, represented as a MethodType. |
| * @param implMethod The implementation method which should be called (with |
| * suitable adaptation of argument types, return types, |
| * and adjustment for captured arguments) when methods of |
| * the resulting functional interface instance are invoked. |
| * @param instantiatedMethodType The signature of the primary functional |
| * interface method after type variables are |
| * substituted with their instantiation from |
| * the capture site |
| * @param isSerializable Should the lambda be made serializable? If set, |
| * either the target type or one of the additional SAM |
| * types must extend {@code Serializable}. |
| * @param markerInterfaces Additional interfaces which the lambda object |
| * should implement. |
| * @param additionalBridges Method types for additional signatures to be |
| * bridged to the implementation method |
| * @throws LambdaConversionException If any of the meta-factory protocol |
| * invariants are violated |
| */ |
| public InnerClassLambdaMetafactory(MethodHandles.Lookup caller, |
| MethodType invokedType, |
| String samMethodName, |
| MethodType samMethodType, |
| MethodHandle implMethod, |
| MethodType instantiatedMethodType, |
| boolean isSerializable, |
| Class<?>[] markerInterfaces, |
| MethodType[] additionalBridges) |
| throws LambdaConversionException { |
| super(caller, invokedType, samMethodName, samMethodType, |
| implMethod, instantiatedMethodType, |
| isSerializable, markerInterfaces, additionalBridges); |
| implMethodClassName = implDefiningClass.getName().replace('.', '/'); |
| implMethodName = implInfo.getName(); |
| implMethodDesc = implMethodType.toMethodDescriptorString(); |
| implMethodReturnClass = (implKind == MethodHandleInfo.REF_newInvokeSpecial) |
| ? implDefiningClass |
| : implMethodType.returnType(); |
| constructorType = invokedType.changeReturnType(Void.TYPE); |
| lambdaClassName = targetClass.getName().replace('.', '/') + "$$Lambda$" + counter.incrementAndGet(); |
| cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); |
| int parameterCount = invokedType.parameterCount(); |
| if (parameterCount > 0) { |
| argNames = new String[parameterCount]; |
| argDescs = new String[parameterCount]; |
| for (int i = 0; i < parameterCount; i++) { |
| argNames[i] = "arg$" + (i + 1); |
| argDescs[i] = BytecodeDescriptor.unparse(invokedType.parameterType(i)); |
| } |
| } else { |
| argNames = argDescs = EMPTY_STRING_ARRAY; |
| } |
| } |
| |
| /** |
| * Build the CallSite. Generate a class file which implements the functional |
| * interface, define the class, if there are no parameters create an instance |
| * of the class which the CallSite will return, otherwise, generate handles |
| * which will call the class' constructor. |
| * |
| * @return a CallSite, which, when invoked, will return an instance of the |
| * functional interface |
| * @throws ReflectiveOperationException |
| * @throws LambdaConversionException If properly formed functional interface |
| * is not found |
| */ |
| @Override |
| CallSite buildCallSite() throws LambdaConversionException { |
| final Class<?> innerClass = spinInnerClass(); |
| if (invokedType.parameterCount() == 0) { |
| final Constructor<?>[] ctrs = AccessController.doPrivileged( |
| new PrivilegedAction<>() { |
| @Override |
| public Constructor<?>[] run() { |
| Constructor<?>[] ctrs = innerClass.getDeclaredConstructors(); |
| if (ctrs.length == 1) { |
| // The lambda implementing inner class constructor is private, set |
| // it accessible (by us) before creating the constant sole instance |
| ctrs[0].setAccessible(true); |
| } |
| return ctrs; |
| } |
| }); |
| if (ctrs.length != 1) { |
| throw new LambdaConversionException("Expected one lambda constructor for " |
| + innerClass.getCanonicalName() + ", got " + ctrs.length); |
| } |
| |
| try { |
| Object inst = ctrs[0].newInstance(); |
| return new ConstantCallSite(MethodHandles.constant(samBase, inst)); |
| } |
| catch (ReflectiveOperationException e) { |
| throw new LambdaConversionException("Exception instantiating lambda object", e); |
| } |
| } else { |
| try { |
| UNSAFE.ensureClassInitialized(innerClass); |
| return new ConstantCallSite( |
| MethodHandles.Lookup.IMPL_LOOKUP |
| .findStatic(innerClass, NAME_FACTORY, invokedType)); |
| } |
| catch (ReflectiveOperationException e) { |
| throw new LambdaConversionException("Exception finding constructor", e); |
| } |
| } |
| } |
| |
| /** |
| * Generate a class file which implements the functional |
| * interface, define and return the class. |
| * |
| * @implNote The class that is generated does not include signature |
| * information for exceptions that may be present on the SAM method. |
| * This is to reduce classfile size, and is harmless as checked exceptions |
| * are erased anyway, no one will ever compile against this classfile, |
| * and we make no guarantees about the reflective properties of lambda |
| * objects. |
| * |
| * @return a Class which implements the functional interface |
| * @throws LambdaConversionException If properly formed functional interface |
| * is not found |
| */ |
| private Class<?> spinInnerClass() throws LambdaConversionException { |
| String[] interfaces; |
| String samIntf = samBase.getName().replace('.', '/'); |
| boolean accidentallySerializable = !isSerializable && Serializable.class.isAssignableFrom(samBase); |
| if (markerInterfaces.length == 0) { |
| interfaces = new String[]{samIntf}; |
| } else { |
| // Assure no duplicate interfaces (ClassFormatError) |
| Set<String> itfs = new LinkedHashSet<>(markerInterfaces.length + 1); |
| itfs.add(samIntf); |
| for (Class<?> markerInterface : markerInterfaces) { |
| itfs.add(markerInterface.getName().replace('.', '/')); |
| accidentallySerializable |= !isSerializable && Serializable.class.isAssignableFrom(markerInterface); |
| } |
| interfaces = itfs.toArray(new String[itfs.size()]); |
| } |
| |
| cw.visit(CLASSFILE_VERSION, ACC_SUPER + ACC_FINAL + ACC_SYNTHETIC, |
| lambdaClassName, null, |
| JAVA_LANG_OBJECT, interfaces); |
| |
| // Generate final fields to be filled in by constructor |
| for (int i = 0; i < argDescs.length; i++) { |
| FieldVisitor fv = cw.visitField(ACC_PRIVATE + ACC_FINAL, |
| argNames[i], |
| argDescs[i], |
| null, null); |
| fv.visitEnd(); |
| } |
| |
| generateConstructor(); |
| |
| if (invokedType.parameterCount() != 0) { |
| generateFactory(); |
| } |
| |
| // Forward the SAM method |
| MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, samMethodName, |
| samMethodType.toMethodDescriptorString(), null, null); |
| mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true); |
| new ForwardingMethodGenerator(mv).generate(samMethodType); |
| |
| // Forward the bridges |
| if (additionalBridges != null) { |
| for (MethodType mt : additionalBridges) { |
| mv = cw.visitMethod(ACC_PUBLIC|ACC_BRIDGE, samMethodName, |
| mt.toMethodDescriptorString(), null, null); |
| mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true); |
| new ForwardingMethodGenerator(mv).generate(mt); |
| } |
| } |
| |
| if (isSerializable) |
| generateSerializationFriendlyMethods(); |
| else if (accidentallySerializable) |
| generateSerializationHostileMethods(); |
| |
| cw.visitEnd(); |
| |
| // Define the generated class in this VM. |
| |
| final byte[] classBytes = cw.toByteArray(); |
| |
| // If requested, dump out to a file for debugging purposes |
| if (dumper != null) { |
| AccessController.doPrivileged(new PrivilegedAction<>() { |
| @Override |
| public Void run() { |
| dumper.dumpClass(lambdaClassName, classBytes); |
| return null; |
| } |
| }, null, |
| new FilePermission("<<ALL FILES>>", "read, write"), |
| // createDirectories may need it |
| new PropertyPermission("user.dir", "read")); |
| } |
| |
| return UNSAFE.defineAnonymousClass(targetClass, classBytes, null); |
| } |
| |
| /** |
| * Generate the factory method for the class |
| */ |
| private void generateFactory() { |
| MethodVisitor m = cw.visitMethod(ACC_PRIVATE | ACC_STATIC, NAME_FACTORY, invokedType.toMethodDescriptorString(), null, null); |
| m.visitCode(); |
| m.visitTypeInsn(NEW, lambdaClassName); |
| m.visitInsn(Opcodes.DUP); |
| int parameterCount = invokedType.parameterCount(); |
| for (int typeIndex = 0, varIndex = 0; typeIndex < parameterCount; typeIndex++) { |
| Class<?> argType = invokedType.parameterType(typeIndex); |
| m.visitVarInsn(getLoadOpcode(argType), varIndex); |
| varIndex += getParameterSize(argType); |
| } |
| m.visitMethodInsn(INVOKESPECIAL, lambdaClassName, NAME_CTOR, constructorType.toMethodDescriptorString(), false); |
| m.visitInsn(ARETURN); |
| m.visitMaxs(-1, -1); |
| m.visitEnd(); |
| } |
| |
| /** |
| * Generate the constructor for the class |
| */ |
| private void generateConstructor() { |
| // Generate constructor |
| MethodVisitor ctor = cw.visitMethod(ACC_PRIVATE, NAME_CTOR, |
| constructorType.toMethodDescriptorString(), null, null); |
| ctor.visitCode(); |
| ctor.visitVarInsn(ALOAD, 0); |
| ctor.visitMethodInsn(INVOKESPECIAL, JAVA_LANG_OBJECT, NAME_CTOR, |
| METHOD_DESCRIPTOR_VOID, false); |
| int parameterCount = invokedType.parameterCount(); |
| for (int i = 0, lvIndex = 0; i < parameterCount; i++) { |
| ctor.visitVarInsn(ALOAD, 0); |
| Class<?> argType = invokedType.parameterType(i); |
| ctor.visitVarInsn(getLoadOpcode(argType), lvIndex + 1); |
| lvIndex += getParameterSize(argType); |
| ctor.visitFieldInsn(PUTFIELD, lambdaClassName, argNames[i], argDescs[i]); |
| } |
| ctor.visitInsn(RETURN); |
| // Maxs computed by ClassWriter.COMPUTE_MAXS, these arguments ignored |
| ctor.visitMaxs(-1, -1); |
| ctor.visitEnd(); |
| } |
| |
| /** |
| * Generate a writeReplace method that supports serialization |
| */ |
| private void generateSerializationFriendlyMethods() { |
| TypeConvertingMethodAdapter mv |
| = new TypeConvertingMethodAdapter( |
| cw.visitMethod(ACC_PRIVATE + ACC_FINAL, |
| NAME_METHOD_WRITE_REPLACE, DESCR_METHOD_WRITE_REPLACE, |
| null, null)); |
| |
| mv.visitCode(); |
| mv.visitTypeInsn(NEW, NAME_SERIALIZED_LAMBDA); |
| mv.visitInsn(DUP); |
| mv.visitLdcInsn(Type.getType(targetClass)); |
| mv.visitLdcInsn(invokedType.returnType().getName().replace('.', '/')); |
| mv.visitLdcInsn(samMethodName); |
| mv.visitLdcInsn(samMethodType.toMethodDescriptorString()); |
| mv.visitLdcInsn(implInfo.getReferenceKind()); |
| mv.visitLdcInsn(implInfo.getDeclaringClass().getName().replace('.', '/')); |
| mv.visitLdcInsn(implInfo.getName()); |
| mv.visitLdcInsn(implInfo.getMethodType().toMethodDescriptorString()); |
| mv.visitLdcInsn(instantiatedMethodType.toMethodDescriptorString()); |
| mv.iconst(argDescs.length); |
| mv.visitTypeInsn(ANEWARRAY, JAVA_LANG_OBJECT); |
| for (int i = 0; i < argDescs.length; i++) { |
| mv.visitInsn(DUP); |
| mv.iconst(i); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitFieldInsn(GETFIELD, lambdaClassName, argNames[i], argDescs[i]); |
| mv.boxIfTypePrimitive(Type.getType(argDescs[i])); |
| mv.visitInsn(AASTORE); |
| } |
| mv.visitMethodInsn(INVOKESPECIAL, NAME_SERIALIZED_LAMBDA, NAME_CTOR, |
| DESCR_CTOR_SERIALIZED_LAMBDA, false); |
| mv.visitInsn(ARETURN); |
| // Maxs computed by ClassWriter.COMPUTE_MAXS, these arguments ignored |
| mv.visitMaxs(-1, -1); |
| mv.visitEnd(); |
| } |
| |
| /** |
| * Generate a readObject/writeObject method that is hostile to serialization |
| */ |
| private void generateSerializationHostileMethods() { |
| MethodVisitor mv = cw.visitMethod(ACC_PRIVATE + ACC_FINAL, |
| NAME_METHOD_WRITE_OBJECT, DESCR_METHOD_WRITE_OBJECT, |
| null, SER_HOSTILE_EXCEPTIONS); |
| mv.visitCode(); |
| mv.visitTypeInsn(NEW, NAME_NOT_SERIALIZABLE_EXCEPTION); |
| mv.visitInsn(DUP); |
| mv.visitLdcInsn("Non-serializable lambda"); |
| mv.visitMethodInsn(INVOKESPECIAL, NAME_NOT_SERIALIZABLE_EXCEPTION, NAME_CTOR, |
| DESCR_CTOR_NOT_SERIALIZABLE_EXCEPTION, false); |
| mv.visitInsn(ATHROW); |
| mv.visitMaxs(-1, -1); |
| mv.visitEnd(); |
| |
| mv = cw.visitMethod(ACC_PRIVATE + ACC_FINAL, |
| NAME_METHOD_READ_OBJECT, DESCR_METHOD_READ_OBJECT, |
| null, SER_HOSTILE_EXCEPTIONS); |
| mv.visitCode(); |
| mv.visitTypeInsn(NEW, NAME_NOT_SERIALIZABLE_EXCEPTION); |
| mv.visitInsn(DUP); |
| mv.visitLdcInsn("Non-serializable lambda"); |
| mv.visitMethodInsn(INVOKESPECIAL, NAME_NOT_SERIALIZABLE_EXCEPTION, NAME_CTOR, |
| DESCR_CTOR_NOT_SERIALIZABLE_EXCEPTION, false); |
| mv.visitInsn(ATHROW); |
| mv.visitMaxs(-1, -1); |
| mv.visitEnd(); |
| } |
| |
| /** |
| * This class generates a method body which calls the lambda implementation |
| * method, converting arguments, as needed. |
| */ |
| private class ForwardingMethodGenerator extends TypeConvertingMethodAdapter { |
| |
| ForwardingMethodGenerator(MethodVisitor mv) { |
| super(mv); |
| } |
| |
| void generate(MethodType methodType) { |
| visitCode(); |
| |
| if (implKind == MethodHandleInfo.REF_newInvokeSpecial) { |
| visitTypeInsn(NEW, implMethodClassName); |
| visitInsn(DUP); |
| } |
| for (int i = 0; i < argNames.length; i++) { |
| visitVarInsn(ALOAD, 0); |
| visitFieldInsn(GETFIELD, lambdaClassName, argNames[i], argDescs[i]); |
| } |
| |
| convertArgumentTypes(methodType); |
| |
| // Invoke the method we want to forward to |
| visitMethodInsn(invocationOpcode(), implMethodClassName, |
| implMethodName, implMethodDesc, |
| implDefiningClass.isInterface()); |
| |
| // Convert the return value (if any) and return it |
| // Note: if adapting from non-void to void, the 'return' |
| // instruction will pop the unneeded result |
| Class<?> samReturnClass = methodType.returnType(); |
| convertType(implMethodReturnClass, samReturnClass, samReturnClass); |
| visitInsn(getReturnOpcode(samReturnClass)); |
| // Maxs computed by ClassWriter.COMPUTE_MAXS,these arguments ignored |
| visitMaxs(-1, -1); |
| visitEnd(); |
| } |
| |
| private void convertArgumentTypes(MethodType samType) { |
| int lvIndex = 0; |
| boolean samIncludesReceiver = implIsInstanceMethod && |
| invokedType.parameterCount() == 0; |
| int samReceiverLength = samIncludesReceiver ? 1 : 0; |
| if (samIncludesReceiver) { |
| // push receiver |
| Class<?> rcvrType = samType.parameterType(0); |
| visitVarInsn(getLoadOpcode(rcvrType), lvIndex + 1); |
| lvIndex += getParameterSize(rcvrType); |
| convertType(rcvrType, implDefiningClass, instantiatedMethodType.parameterType(0)); |
| } |
| int samParametersLength = samType.parameterCount(); |
| int argOffset = implMethodType.parameterCount() - samParametersLength; |
| for (int i = samReceiverLength; i < samParametersLength; i++) { |
| Class<?> argType = samType.parameterType(i); |
| visitVarInsn(getLoadOpcode(argType), lvIndex + 1); |
| lvIndex += getParameterSize(argType); |
| convertType(argType, implMethodType.parameterType(argOffset + i), instantiatedMethodType.parameterType(i)); |
| } |
| } |
| |
| private int invocationOpcode() throws InternalError { |
| switch (implKind) { |
| case MethodHandleInfo.REF_invokeStatic: |
| return INVOKESTATIC; |
| case MethodHandleInfo.REF_newInvokeSpecial: |
| return INVOKESPECIAL; |
| case MethodHandleInfo.REF_invokeVirtual: |
| return INVOKEVIRTUAL; |
| case MethodHandleInfo.REF_invokeInterface: |
| return INVOKEINTERFACE; |
| case MethodHandleInfo.REF_invokeSpecial: |
| return INVOKESPECIAL; |
| default: |
| throw new InternalError("Unexpected invocation kind: " + implKind); |
| } |
| } |
| } |
| |
| static int getParameterSize(Class<?> c) { |
| if (c == Void.TYPE) { |
| return 0; |
| } else if (c == Long.TYPE || c == Double.TYPE) { |
| return 2; |
| } |
| return 1; |
| } |
| |
| static int getLoadOpcode(Class<?> c) { |
| if(c == Void.TYPE) { |
| throw new InternalError("Unexpected void type of load opcode"); |
| } |
| return ILOAD + getOpcodeOffset(c); |
| } |
| |
| static int getReturnOpcode(Class<?> c) { |
| if(c == Void.TYPE) { |
| return RETURN; |
| } |
| return IRETURN + getOpcodeOffset(c); |
| } |
| |
| private static int getOpcodeOffset(Class<?> c) { |
| if (c.isPrimitive()) { |
| if (c == Long.TYPE) { |
| return 1; |
| } else if (c == Float.TYPE) { |
| return 2; |
| } else if (c == Double.TYPE) { |
| return 3; |
| } |
| return 0; |
| } else { |
| return 4; |
| } |
| } |
| |
| } |