Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/memory/OneContigSpaceCardGeneration.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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1 /* | |
2 * Copyright 2000 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 | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.runtime.*; | |
32 import sun.jvm.hotspot.types.*; | |
33 | |
34 /** <P> OneSpaceOldGeneration models a heap of old objects contained | |
35 in a single contiguous space. </P> | |
36 | |
37 <P> Garbage collection is performed using mark-compact. </P> */ | |
38 | |
39 public abstract class OneContigSpaceCardGeneration extends CardGeneration { | |
40 private static AddressField theSpaceField; | |
41 | |
42 static { | |
43 VM.registerVMInitializedObserver(new Observer() { | |
44 public void update(Observable o, Object data) { | |
45 initialize(VM.getVM().getTypeDataBase()); | |
46 } | |
47 }); | |
48 } | |
49 | |
50 private static synchronized void initialize(TypeDataBase db) { | |
51 Type type = db.lookupType("OneContigSpaceCardGeneration"); | |
52 | |
53 theSpaceField = type.getAddressField("_the_space"); | |
54 } | |
55 | |
56 public OneContigSpaceCardGeneration(Address addr) { | |
57 super(addr); | |
58 } | |
59 | |
60 public ContiguousSpace theSpace() { | |
61 return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, theSpaceField.getValue(addr)); | |
62 } | |
63 | |
64 public boolean isIn(Address p) { | |
65 return theSpace().contains(p); | |
66 } | |
67 | |
68 /** Space queries */ | |
69 public long capacity() { return theSpace().capacity(); } | |
70 public long used() { return theSpace().used(); } | |
71 public long free() { return theSpace().free(); } | |
72 public long contiguousAvailable() { return theSpace().free() + virtualSpace().uncommittedSize(); } | |
73 | |
74 public void spaceIterate(SpaceClosure blk, boolean usedOnly) { | |
75 blk.doSpace(theSpace()); | |
76 } | |
77 | |
78 public void printOn(PrintStream tty) { | |
79 tty.print(" old "); | |
80 theSpace().printOn(tty); | |
81 } | |
82 } |