Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/HeapRegion.java @ 3972:4f93f0d00802
7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc
author | tonyp |
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date | Tue, 20 Sep 2011 09:59:59 -0400 |
parents | |
children | 1526a938e670 |
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3953:77e1a9153757 | 3972:4f93f0d00802 |
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1 /* | |
2 * Copyright (c) 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.gc_implementation.g1; | |
26 | |
27 import java.util.Observable; | |
28 import java.util.Observer; | |
29 | |
30 import sun.jvm.hotspot.debugger.Address; | |
31 import sun.jvm.hotspot.memory.ContiguousSpace; | |
32 import sun.jvm.hotspot.runtime.VM; | |
33 import sun.jvm.hotspot.types.CIntegerField; | |
34 import sun.jvm.hotspot.types.Type; | |
35 import sun.jvm.hotspot.types.TypeDataBase; | |
36 | |
37 // Mirror class for HeapRegion. Currently we don't actually include | |
38 // any of its fields but only iterate over it (which we get "for free" | |
39 // as HeapRegion ultimately inherits from ContiguousSpace). | |
40 | |
41 public class HeapRegion extends ContiguousSpace { | |
42 // static int GrainBytes; | |
43 static private CIntegerField grainBytesField; | |
44 | |
45 static { | |
46 VM.registerVMInitializedObserver(new Observer() { | |
47 public void update(Observable o, Object data) { | |
48 initialize(VM.getVM().getTypeDataBase()); | |
49 } | |
50 }); | |
51 } | |
52 | |
53 static private synchronized void initialize(TypeDataBase db) { | |
54 Type type = db.lookupType("HeapRegion"); | |
55 | |
56 grainBytesField = type.getCIntegerField("GrainBytes"); | |
57 } | |
58 | |
59 static public long grainBytes() { | |
60 return grainBytesField.getValue(); | |
61 } | |
62 | |
63 public HeapRegion(Address addr) { | |
64 super(addr); | |
65 } | |
66 } |