Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/memory/DefNewGeneration.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c70a245cad3a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/memory/DefNewGeneration.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,104 @@ +/* + * Copyright 2000-2005 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(" from"); + from().printOn(tty); + tty.print(" to "); + to().printOn(tty); + } +}