| /* |
| * 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.util.StringTokenizer; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| import com.sun.org.apache.bcel.internal.classfile.Constant; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantCP; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantPool; |
| |
| /** |
| * Super class for the INVOKExxx family of instructions. |
| * |
| * @LastModified: Jan 2020 |
| */ |
| public abstract class InvokeInstruction extends FieldOrMethod implements ExceptionThrower, |
| StackConsumer, StackProducer { |
| |
| /** |
| * Empty constructor needed for Instruction.readInstruction. |
| * Not to be used otherwise. |
| */ |
| InvokeInstruction() { |
| } |
| |
| |
| /** |
| * @param index to constant pool |
| */ |
| protected InvokeInstruction(final short opcode, final int index) { |
| super(opcode, index); |
| } |
| |
| |
| /** |
| * @return mnemonic for instruction with symbolic references resolved |
| */ |
| @Override |
| public String toString( final ConstantPool cp ) { |
| final Constant c = cp.getConstant(super.getIndex()); |
| final StringTokenizer tok = new StringTokenizer(cp.constantToString(c)); |
| |
| final String opcodeName = Const.getOpcodeName(super.getOpcode()); |
| |
| final StringBuilder sb = new StringBuilder(opcodeName); |
| if (tok.hasMoreTokens()) { |
| sb.append(" "); |
| sb.append(tok.nextToken().replace('.', '/')); |
| if (tok.hasMoreTokens()) { |
| sb.append(tok.nextToken()); |
| } |
| } |
| |
| return sb.toString(); |
| } |
| |
| |
| /** |
| * Also works for instructions whose stack effect depends on the |
| * constant pool entry they reference. |
| * @return Number of words consumed from stack by this instruction |
| */ |
| @Override |
| public int consumeStack( final ConstantPoolGen cpg ) { |
| int sum; |
| if ((super.getOpcode() == Const.INVOKESTATIC) || (super.getOpcode() == Const.INVOKEDYNAMIC)) { |
| sum = 0; |
| } else { |
| sum = 1; // this reference |
| } |
| |
| final String signature = getSignature(cpg); |
| sum += Type.getArgumentTypesSize(signature); |
| return sum; |
| } |
| |
| |
| /** |
| * Also works for instructions whose stack effect depends on the |
| * constant pool entry they reference. |
| * @return Number of words produced onto stack by this instruction |
| */ |
| @Override |
| public int produceStack( final ConstantPoolGen cpg ) { |
| final String signature = getSignature(cpg); |
| return Type.getReturnTypeSize(signature); |
| } |
| |
| /** |
| * This overrides the deprecated version as we know here that the referenced class |
| * may legally be an array. |
| * |
| * @deprecated in FieldOrMethod |
| * |
| * @return name of the referenced class/interface |
| * @throws IllegalArgumentException if the referenced class is an array (this should not happen) |
| */ |
| @Override |
| @Deprecated |
| public String getClassName( final ConstantPoolGen cpg ) { |
| final ConstantPool cp = cpg.getConstantPool(); |
| final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex()); |
| final String className = cp.getConstantString(cmr.getClassIndex(), Const.CONSTANT_Class); |
| return className.replace('/', '.'); |
| } |
| |
| /** @return return type of referenced method. |
| */ |
| @Override |
| public Type getType( final ConstantPoolGen cpg ) { |
| return getReturnType(cpg); |
| } |
| |
| |
| /** @return name of referenced method. |
| */ |
| public String getMethodName( final ConstantPoolGen cpg ) { |
| return getName(cpg); |
| } |
| |
| |
| /** @return return type of referenced method. |
| */ |
| public Type getReturnType( final ConstantPoolGen cpg ) { |
| return Type.getReturnType(getSignature(cpg)); |
| } |
| |
| |
| /** @return argument types of referenced method. |
| */ |
| public Type[] getArgumentTypes( final ConstantPoolGen cpg ) { |
| return Type.getArgumentTypes(getSignature(cpg)); |
| } |
| |
| } |