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view agent/src/share/classes/sun/jvm/hotspot/gc_implementation/parallelScavenge/PSYoungGen.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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/* * Copyright 2003 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.gc_implementation.parallelScavenge; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.gc_implementation.shared.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; public class PSYoungGen extends VMObject { 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("PSYoungGen"); edenSpaceField = type.getAddressField("_eden_space"); fromSpaceField = type.getAddressField("_from_space"); toSpaceField = type.getAddressField("_to_space"); } public PSYoungGen(Address addr) { super(addr); } // Fields private static AddressField edenSpaceField; private static AddressField fromSpaceField; private static AddressField toSpaceField; // Accessors public MutableSpace edenSpace() { return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, edenSpaceField.getValue(addr)); } public MutableSpace fromSpace() { return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, fromSpaceField.getValue(addr)); } public MutableSpace toSpace() { return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, toSpaceField.getValue(addr)); } public long capacity() { return edenSpace().capacity() + fromSpace().capacity(); } public long used() { return edenSpace().used() + fromSpace().used(); } public boolean isIn(Address a) { if (edenSpace().contains(a)) { return true; } if (fromSpace().contains(a)) { return true; } return false; } public void printOn(PrintStream tty) { tty.print("PSYoungGen [ "); tty.print("eden = "); edenSpace().printOn(tty); tty.print(", from = "); fromSpace().printOn(tty); tty.print(", to = "); toSpace().printOn(tty); tty.print(" ] "); } }