| /* |
| * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.generic; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| import com.sun.org.apache.bcel.internal.ExceptionConst; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantInvokeDynamic; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantNameAndType; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantPool; |
| import com.sun.org.apache.bcel.internal.util.ByteSequence; |
| |
| /** |
| * Class for INVOKEDYNAMIC. Not an instance of InvokeInstruction, since that class |
| * expects to be able to get the class of the method. Ignores the bootstrap |
| * mechanism entirely. |
| * |
| * @see |
| * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokedynamic"> |
| * The invokedynamic instruction in The Java Virtual Machine Specification</a> |
| * @since 6.0 |
| * @LastModified: Jan 2020 |
| */ |
| public class INVOKEDYNAMIC extends InvokeInstruction { |
| |
| /** |
| * Empty constructor needed for Instruction.readInstruction. |
| * Not to be used otherwise. |
| */ |
| INVOKEDYNAMIC() { |
| } |
| |
| |
| public INVOKEDYNAMIC(final int index) { |
| super(Const.INVOKEDYNAMIC, index); |
| } |
| |
| |
| /** |
| * Dump instruction as byte code to stream out. |
| * @param out Output stream |
| */ |
| @Override |
| public void dump( final DataOutputStream out ) throws IOException { |
| out.writeByte(super.getOpcode()); |
| out.writeShort(super.getIndex()); |
| out.writeByte(0); |
| out.writeByte(0); |
| } |
| |
| |
| /** |
| * Read needed data (i.e., index) from file. |
| */ |
| @Override |
| protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { |
| super.initFromFile(bytes, wide); |
| super.setLength(5); |
| bytes.readByte(); // Skip 0 byte |
| bytes.readByte(); // Skip 0 byte |
| } |
| |
| |
| /** |
| * @return mnemonic for instruction with symbolic references resolved |
| */ |
| @Override |
| public String toString( final ConstantPool cp ) { |
| return super.toString(cp); |
| } |
| |
| |
| @Override |
| public Class<?>[] getExceptions() { |
| return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_INTERFACE_METHOD_RESOLUTION, |
| ExceptionConst.UNSATISFIED_LINK_ERROR, |
| ExceptionConst.ABSTRACT_METHOD_ERROR, |
| ExceptionConst.ILLEGAL_ACCESS_ERROR, |
| ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR); |
| } |
| |
| |
| /** |
| * Call corresponding visitor method(s). The order is: |
| * Call visitor methods of implemented interfaces first, then |
| * call methods according to the class hierarchy in descending order, |
| * i.e., the most specific visitXXX() call comes last. |
| * |
| * @param v Visitor object |
| */ |
| @Override |
| public void accept( final Visitor v ) { |
| v.visitExceptionThrower(this); |
| v.visitTypedInstruction(this); |
| v.visitStackConsumer(this); |
| v.visitStackProducer(this); |
| v.visitLoadClass(this); |
| v.visitCPInstruction(this); |
| v.visitFieldOrMethod(this); |
| v.visitInvokeInstruction(this); |
| v.visitINVOKEDYNAMIC(this); |
| } |
| |
| /** |
| * Override the parent method because our classname is held elsewhere. |
| * |
| * @param cpg the ConstantPool generator |
| * @deprecated in FieldOrMethod |
| * |
| * @return name of the referenced class/interface |
| */ |
| @Override |
| @Deprecated |
| public String getClassName( final ConstantPoolGen cpg ) { |
| final ConstantPool cp = cpg.getConstantPool(); |
| final ConstantInvokeDynamic cid = (ConstantInvokeDynamic) cp.getConstant(super.getIndex(), Const.CONSTANT_InvokeDynamic); |
| return ((ConstantNameAndType) cp.getConstant(cid.getNameAndTypeIndex())).getName(cp); |
| } |
| |
| |
| /** |
| * Since InvokeDynamic doesn't refer to a reference type, just return java.lang.Object, |
| * as that is the only type we can say for sure the reference will be. |
| * |
| * @param cpg |
| * the ConstantPoolGen used to create the instruction |
| * @return an ObjectType for java.lang.Object |
| * @since 6.1 |
| */ |
| @Override |
| public ReferenceType getReferenceType(final ConstantPoolGen cpg) { |
| return new ObjectType(Object.class.getName()); |
| } |
| } |