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comparison agent/src/share/classes/sun/jvm/hotspot/memory/ConcurrentMarkSweepGeneration.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.memory;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*;
32
33 public class ConcurrentMarkSweepGeneration extends CardGeneration {
34 private static AddressField cmsSpaceField;
35
36 public ConcurrentMarkSweepGeneration(Address addr) {
37 super(addr);
38 }
39
40 static {
41 VM.registerVMInitializedObserver(new Observer() {
42 public void update(Observable o, Object data) {
43 initialize(VM.getVM().getTypeDataBase());
44 }
45 });
46 }
47
48 private static synchronized void initialize(TypeDataBase db) {
49 Type type = db.lookupType("ConcurrentMarkSweepGeneration");
50 cmsSpaceField = type.getAddressField("_cmsSpace");
51 }
52
53 // Accessing space
54 public CompactibleFreeListSpace cmsSpace() {
55 return (CompactibleFreeListSpace) VMObjectFactory.newObject(
56 CompactibleFreeListSpace.class,
57 cmsSpaceField.getValue(addr));
58 }
59
60 public long capacity() { return cmsSpace().capacity(); }
61 public long used() { return cmsSpace().used(); }
62 public long free() { return cmsSpace().free(); }
63 public long contiguousAvailable() { throw new RuntimeException("not yet implemented"); }
64 public boolean contains(Address p) { return cmsSpace().contains(p); }
65 public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
66 blk.doSpace(cmsSpace());
67 }
68
69 public Generation.Name kind() {
70 return Generation.Name.CONCURRENT_MARK_SWEEP;
71 }
72
73 public String name() {
74 return "concurrent mark-sweep generation";
75 }
76
77 public void printOn(PrintStream tty) {
78 tty.println(name());
79 cmsSpace().printOn(tty);
80 }
81 }