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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2005 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.gc_interface;
26
27 import java.io.*;
28 import java.util.*;
29
30 import sun.jvm.hotspot.debugger.*;
31 import sun.jvm.hotspot.memory.*;
32 import sun.jvm.hotspot.runtime.*;
33 import sun.jvm.hotspot.types.*;
34
35 public class CollectedHeap extends VMObject {
36 private static long reservedFieldOffset;
37
38 static {
39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase());
42 }
43 });
44 }
45
46 private static synchronized void initialize(TypeDataBase db) {
47 Type type = db.lookupType("CollectedHeap");
48
49 reservedFieldOffset = type.getField("_reserved").getOffset();
50 }
51
52 public CollectedHeap(Address addr) {
53 super(addr);
54 }
55
56 /** Returns the lowest address of the heap. */
57 public Address start() {
58 return reservedRegion().start();
59 }
60
61 public long capacity() { return 0; }
62 public long used() { return 0; }
63
64 public MemRegion reservedRegion() {
65 return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
66 }
67
68 public boolean isIn(Address a) {
69 return isInReserved(a);
70 }
71
72 public boolean isInReserved(Address a) {
73 return reservedRegion().contains(a);
74 }
75
76 public CollectedHeapName kind() {
77 return CollectedHeapName.ABSTRACT;
78 }
79
80 public void print() { printOn(System.out); }
81 public void printOn(PrintStream tty) {
82 MemRegion mr = reservedRegion();
83 tty.println("unknown subtype of CollectedHeap @ " + getAddress() + " (" +
84 mr.start() + "," + mr.end() + ")");
85 }
86 }