| /* |
| * Copyright (c) 2000, 2008, 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.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); |
| } |
| } |