1/* 2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25package sun.jvm.hotspot.interpreter; 26 27import sun.jvm.hotspot.oops.*; 28import sun.jvm.hotspot.runtime.*; 29 30// any bytecode with constant pool index 31 32public abstract class BytecodeWithCPIndex extends Bytecode { 33 BytecodeWithCPIndex(Method method, int bci) { 34 super(method, bci); 35 } 36 37 // the constant pool index for this bytecode 38 public int index() { 39 if (code() == Bytecodes._invokedynamic) { 40 int index = getIndexU4(); 41 if (ConstantPool.isInvokedynamicIndex(index)) { 42 return ConstantPool.decodeInvokedynamicIndex(index); 43 } else { 44 return index; 45 } 46 } else { 47 return getIndexU2(code(), false); 48 } 49 } 50 51 protected int indexForFieldOrMethod() { 52 ConstantPoolCache cpCache = method().getConstants().getCache(); 53 // get ConstantPool index from ConstantPoolCacheIndex at given bci 54 int cpCacheIndex = index(); 55 if (cpCache == null) { 56 return cpCacheIndex; 57 } else { 58 return cpCache.getEntryAt((int) (0xFFFF & cpCacheIndex)).getConstantPoolIndex(); 59 } 60 } 61} 62