Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/memory/ContiguousSpace.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 2000-2004 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 public class ContiguousSpace extends CompactibleSpace { | |
35 private static AddressField topField; | |
36 | |
37 static { | |
38 VM.registerVMInitializedObserver(new Observer() { | |
39 public void update(Observable o, Object data) { | |
40 initialize(VM.getVM().getTypeDataBase()); | |
41 } | |
42 }); | |
43 } | |
44 | |
45 private static synchronized void initialize(TypeDataBase db) { | |
46 Type type = db.lookupType("ContiguousSpace"); | |
47 | |
48 topField = type.getAddressField("_top"); | |
49 } | |
50 | |
51 public ContiguousSpace(Address addr) { | |
52 super(addr); | |
53 } | |
54 | |
55 public Address top() { | |
56 return topField.getValue(addr); | |
57 } | |
58 | |
59 /** In bytes */ | |
60 public long capacity() { | |
61 return end().minus(bottom()); | |
62 } | |
63 | |
64 /** In bytes */ | |
65 public long used() { | |
66 return top().minus(bottom()); | |
67 } | |
68 | |
69 /** In bytes */ | |
70 public long free() { | |
71 return end().minus(top()); | |
72 } | |
73 | |
74 /** In a contiguous space we have a more obvious bound on what parts | |
75 contain objects. */ | |
76 public MemRegion usedRegion() { | |
77 return new MemRegion(bottom(), top()); | |
78 } | |
79 | |
80 /** Returns regions of Space where live objects live */ | |
81 public List/*<MemRegion>*/ getLiveRegions() { | |
82 List res = new ArrayList(); | |
83 res.add(new MemRegion(bottom(), top())); | |
84 return res; | |
85 } | |
86 | |
87 /** Testers */ | |
88 public boolean contains(Address p) { | |
89 return (bottom().lessThanOrEqual(p) && top().greaterThan(p)); | |
90 } | |
91 | |
92 public void printOn(PrintStream tty) { | |
93 tty.print(" [" + bottom() + "," + | |
94 top() + "," + end() + ")"); | |
95 super.printOn(tty); | |
96 } | |
97 } |