Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/DefNewGeneration.java @ 554:78144dc3db03
Merge
author | never |
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date | Tue, 13 Jan 2009 14:02:19 -0800 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
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/* * Copyright 2000-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.memory; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; /** DefNewGeneration is a young generation containing eden, from- and to-space. */ public class DefNewGeneration extends Generation { protected static AddressField edenSpaceField; protected static AddressField fromSpaceField; protected static AddressField toSpaceField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("DefNewGeneration"); edenSpaceField = type.getAddressField("_eden_space"); fromSpaceField = type.getAddressField("_from_space"); toSpaceField = type.getAddressField("_to_space"); } public DefNewGeneration(Address addr) { super(addr); } public Generation.Name kind() { return Generation.Name.DEF_NEW; } // Accessing spaces public EdenSpace eden() { return (EdenSpace) VMObjectFactory.newObject(EdenSpace.class, edenSpaceField.getValue(addr)); } public ContiguousSpace from() { return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, fromSpaceField.getValue(addr)); } public ContiguousSpace to() { return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, toSpaceField.getValue(addr)); } public long capacity() { return eden().capacity() + from().capacity(); /* to() is only used during scavenge */ } public long used() { return eden().used() + from().used(); /* to() is only used during scavenge */ } public long free() { return eden().free() + from().free(); /* to() is only used during scavenge */ } public long contiguousAvailable() { return eden().free(); } public String name() { return "default new generation"; } public void spaceIterate(SpaceClosure blk, boolean usedOnly) { blk.doSpace(eden()); blk.doSpace(from()); if (!usedOnly) { blk.doSpace(to()); } } public void printOn(PrintStream tty) { tty.print(" eden"); eden().printOn(tty); tty.print("\n from"); from().printOn(tty); tty.print("\n to "); to().printOn(tty); } }