Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCache.java @ 13705:ac5b0f31f7a2
Truffle API-change: FrameDescriptors are now stored in the RootNode in a final field instead of the CallTarget.
author | Christian Humer <christian.humer@gmail.com> |
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date | Fri, 17 Jan 2014 17:06:08 +0100 |
parents | bd7a7ce2e264 |
children |
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/* * Copyright (c) 2000, 2012, 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.oops; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; // ConstantPoolCache : A constant pool cache (ConstantPoolCache). // See cpCache.hpp for details about this class. // public class ConstantPoolCache extends Metadata { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { Type type = db.lookupType("ConstantPoolCache"); constants = new MetadataField(type.getAddressField("_constant_pool"), 0); baseOffset = type.getSize(); Type elType = db.lookupType("ConstantPoolCacheEntry"); elementSize = elType.getSize(); length = new CIntField(type.getCIntegerField("_length"), 0); intSize = VM.getVM().getObjectHeap().getIntSize(); } public ConstantPoolCache(Address addr) { super(addr); } public boolean isConstantPoolCache() { return true; } private static MetadataField constants; private static long baseOffset; private static long elementSize; private static CIntField length; private static long intSize; public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } public long getSize() { return Oop.alignObjectSize(baseOffset + getLength() * elementSize); } public ConstantPoolCacheEntry getEntryAt(int i) { if (i < 0 || i >= getLength()) throw new IndexOutOfBoundsException(i + " " + getLength()); return new ConstantPoolCacheEntry(this, i); } public int getIntAt(int entry, int fld) { //alignObjectSize ? long offset = baseOffset + /*alignObjectSize*/entry * elementSize + fld * intSize; return (int) getAddress().getCIntegerAt(offset, intSize, true ); } public void printValueOn(PrintStream tty) { tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString() + " address = " + getAddress() + " offset = " + baseOffset); } public int getLength() { return (int) length.getValue(getAddress()); } public void iterateFields(MetadataVisitor visitor) { super.iterateFields(visitor); visitor.doMetadata(constants, true); for (int i = 0; i < getLength(); i++) { ConstantPoolCacheEntry entry = getEntryAt(i); entry.iterateFields(visitor); } } };