Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCache.java @ 2468:6c97c830fb6f
Merge
author | jrose |
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date | Sat, 09 Apr 2011 21:16:12 -0700 |
parents | 0a8e0d4345b3 |
children | 6a991dcb52bb |
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/* * Copyright (c) 2000, 2010, 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 (constantPoolCacheOopDesc). // See cpCacheOop.hpp for details about this class. // public class ConstantPoolCache extends Oop { 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("constantPoolCacheOopDesc"); constants = new OopField(type.getOopField("_constant_pool"), 0); baseOffset = type.getSize(); Type elType = db.lookupType("ConstantPoolCacheEntry"); elementSize = elType.getSize(); length = new CIntField(type.getCIntegerField("_length"), 0); } ConstantPoolCache(OopHandle handle, ObjectHeap heap) { super(handle, heap); } public boolean isConstantPoolCache() { return true; } private static OopField constants; private static long baseOffset; private static long elementSize; private static CIntField length; public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } public long getObjectSize() { return alignObjectSize(baseOffset + getLength() * elementSize); } public ConstantPoolCacheEntry getEntryAt(int i) { if (Assert.ASSERTS_ENABLED) { Assert.that(0 <= i && i < getLength(), "index out of bounds"); } return new ConstantPoolCacheEntry(this, i); } public static boolean isSecondaryIndex(int i) { return (i < 0); } public static int decodeSecondaryIndex(int i) { return isSecondaryIndex(i) ? ~i : i; } public static int encodeSecondaryIndex(int i) { return !isSecondaryIndex(i) ? ~i : i; } // secondary entries hold invokedynamic call site bindings public ConstantPoolCacheEntry getSecondaryEntryAt(int i) { ConstantPoolCacheEntry e = new ConstantPoolCacheEntry(this, decodeSecondaryIndex(i)); if (Assert.ASSERTS_ENABLED) { Assert.that(e.isSecondaryEntry(), "must be a secondary entry"); } return e; } public ConstantPoolCacheEntry getMainEntryAt(int i) { if (isSecondaryIndex(i)) { // run through an extra level of indirection: i = getSecondaryEntryAt(i).getMainEntryIndex(); } ConstantPoolCacheEntry e = new ConstantPoolCacheEntry(this, i); if (Assert.ASSERTS_ENABLED) { Assert.that(!e.isSecondaryEntry(), "must not be a secondary entry"); } return e; } public int getIntAt(int entry, int fld) { //alignObjectSize ? long offset = baseOffset + /*alignObjectSize*/entry * elementSize + fld* getHeap().getIntSize(); return (int) getHandle().getCIntegerAt(offset, getHeap().getIntSize(), true ); } public void printValueOn(PrintStream tty) { tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString()); } public int getLength() { return (int) length.getValue(this); } public void iterateFields(OopVisitor visitor, boolean doVMFields) { super.iterateFields(visitor, doVMFields); if (doVMFields) { visitor.doOop(constants, true); for (int i = 0; i < getLength(); i++) { ConstantPoolCacheEntry entry = getEntryAt(i); entry.iterateFields(visitor); } } } };