| /* |
| * Copyright (c) 2003, 2015, 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.gc.cms; |
| |
| import java.io.*; |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.gc.shared.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| |
| public class ConcurrentMarkSweepGeneration extends CardGeneration { |
| private static AddressField cmsSpaceField; |
| |
| public ConcurrentMarkSweepGeneration(Address addr) { |
| super(addr); |
| } |
| |
| 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("ConcurrentMarkSweepGeneration"); |
| cmsSpaceField = type.getAddressField("_cmsSpace"); |
| } |
| |
| // Accessing space |
| public CompactibleFreeListSpace cmsSpace() { |
| return (CompactibleFreeListSpace) VMObjectFactory.newObject( |
| CompactibleFreeListSpace.class, |
| cmsSpaceField.getValue(addr)); |
| } |
| |
| public long capacity() { return cmsSpace().capacity(); } |
| public long used() { return cmsSpace().used(); } |
| public long free() { return cmsSpace().free(); } |
| public long contiguousAvailable() { throw new RuntimeException("not yet implemented"); } |
| public boolean contains(Address p) { return cmsSpace().contains(p); } |
| public void spaceIterate(SpaceClosure blk, boolean usedOnly) { |
| blk.doSpace(cmsSpace()); |
| } |
| |
| public Generation.Name kind() { |
| return Generation.Name.CONCURRENT_MARK_SWEEP; |
| } |
| |
| public String name() { |
| return "concurrent mark-sweep generation"; |
| } |
| |
| public void printOn(PrintStream tty) { |
| tty.println(name()); |
| cmsSpace().printOn(tty); |
| } |
| } |