Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/interpreter/Bytecode.java @ 3945:8ed53447f690
Merge
author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | 6a991dcb52bb |
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/* * Copyright (c) 2001, 2004, 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. * * 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 sun.jvm.hotspot.interpreter; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.utilities.*; import sun.jvm.hotspot.runtime.VM; public class Bytecode { Method method; int bci; static final int jintSize = 4; static final String spaces = " "; static final String comma = ", "; Bytecode(Method method, int bci) { this.method = method; this.bci = bci; } // Address computation // NOTE: assumes that the start of the method's bytecodes is 4-byte aligned int alignedOffset(int offset) { return Bits.roundTo(bci + offset, jintSize) - bci; } public int getIndexU1() { return method.getBytecodeOrBPAt(bci() + 1) & 0xFF; } public int getIndexU2(int bc, boolean isWide) { if (can_use_native_byte_order(bc, isWide)) { return method.getNativeShortArg(bci() + (isWide ? 2 : 1)) & 0xFFFF; } return method.getBytecodeShortArg(bci() + (isWide ? 2 : 1)) & 0xFFFF; } public int getIndexU4() { return method.getNativeIntArg(bci() + 1); } public boolean hasIndexU4() { return code() == Bytecodes._invokedynamic; } public int getIndexU1Cpcache() { return method.getBytecodeOrBPAt(bci() + 1) & 0xFF; } public int getIndexU2Cpcache() { return method.getNativeShortArg(bci() + 1) & 0xFFFF; } static boolean can_use_native_byte_order(int bc, boolean is_wide) { return (VM.getVM().isBigEndian() || Bytecodes.native_byte_order(bc /*, is_wide*/)); } int javaSignedWordAt(int offset) { return method.getBytecodeIntArg(bci + offset); } short javaShortAt(int offset) { return method.getBytecodeShortArg(bci + offset); } byte javaByteAt(int offset) { return method.getBytecodeByteArg(bci + offset); } public Method method() { return method; } public int bci() { return bci; } // hotspot byte code public int code() { return Bytecodes.codeAt(method(), bci()); } // jvm byte code public int javaCode() { return Bytecodes.javaCode(code()); } public String getBytecodeName() { return Bytecodes.name(code()); } public String getJavaBytecodeName() { return Bytecodes.name(javaCode()); } public int getLength() { return Bytecodes.lengthAt(method(), bci()); } public int getJavaLength() { return Bytecodes.javaLengthAt(method(), bci()); } public String toString() { StringBuffer buf = new StringBuffer(getJavaBytecodeName()); if (code() != javaCode()) { buf.append(spaces); buf.append('['); buf.append(getBytecodeName()); buf.append(']'); } return buf.toString(); } }