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167 lines
6.2 KiB
167 lines
6.2 KiB
/*
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* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*/
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package com.sun.org.apache.bcel.internal.generic;
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/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2001 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" and
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* "Apache BCEL" must not be used to endorse or promote products
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* derived from this software without prior written permission. For
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* written permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* "Apache BCEL", nor may "Apache" appear in their name, without
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* prior written permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*/
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import com.sun.org.apache.bcel.internal.classfile.ConstantPool;
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import com.sun.org.apache.bcel.internal.Constants;
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import com.sun.org.apache.bcel.internal.ExceptionConstants;
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import java.io.*;
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import com.sun.org.apache.bcel.internal.util.ByteSequence;
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/**
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* INVOKEINTERFACE - Invoke interface method
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* <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -> ...</PRE>
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*
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* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
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*/
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public final class INVOKEINTERFACE extends InvokeInstruction {
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private int nargs; // Number of arguments on stack (number of stack slots), called "count" in vmspec2
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/**
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* Empty constructor needed for the Class.newInstance() statement in
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* Instruction.readInstruction(). Not to be used otherwise.
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*/
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INVOKEINTERFACE() {}
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public INVOKEINTERFACE(int index, int nargs) {
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super(Constants.INVOKEINTERFACE, index);
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length = 5;
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if(nargs < 1)
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throw new ClassGenException("Number of arguments must be > 0 " + nargs);
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this.nargs = nargs;
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}
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/**
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* Dump instruction as byte code to stream out.
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* @param out Output stream
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*/
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public void dump(DataOutputStream out) throws IOException {
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out.writeByte(opcode);
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out.writeShort(index);
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out.writeByte(nargs);
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out.writeByte(0);
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}
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/**
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* The <B>count</B> argument according to the Java Language Specification,
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* Second Edition.
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*/
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public int getCount() { return nargs; }
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/**
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* Read needed data (i.e., index) from file.
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*/
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protected void initFromFile(ByteSequence bytes, boolean wide)
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throws IOException
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{
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super.initFromFile(bytes, wide);
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length = 5;
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nargs = bytes.readUnsignedByte();
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bytes.readByte(); // Skip 0 byte
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}
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/**
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* @return mnemonic for instruction with symbolic references resolved
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*/
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public String toString(ConstantPool cp) {
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return super.toString(cp) + " " + nargs;
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}
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public int consumeStack(ConstantPoolGen cpg) { // nargs is given in byte-code
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return nargs; // nargs includes this reference
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}
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public Class[] getExceptions() {
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Class[] cs = new Class[4 + ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length];
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System.arraycopy(ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION, 0,
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cs, 0, ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length);
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cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+3] = ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
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cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+2] = ExceptionConstants.ILLEGAL_ACCESS_ERROR;
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cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length+1] = ExceptionConstants.ABSTRACT_METHOD_ERROR;
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cs[ExceptionConstants.EXCS_INTERFACE_METHOD_RESOLUTION.length] = ExceptionConstants.UNSATISFIED_LINK_ERROR;
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return cs;
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}
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/**
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* Call corresponding visitor method(s). The order is:
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* Call visitor methods of implemented interfaces first, then
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* call methods according to the class hierarchy in descending order,
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* i.e., the most specific visitXXX() call comes last.
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*
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* @param v Visitor object
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*/
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public void accept(Visitor v) {
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v.visitExceptionThrower(this);
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v.visitTypedInstruction(this);
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v.visitStackConsumer(this);
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v.visitStackProducer(this);
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v.visitLoadClass(this);
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v.visitCPInstruction(this);
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v.visitFieldOrMethod(this);
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v.visitInvokeInstruction(this);
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v.visitINVOKEINTERFACE(this);
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}
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}
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