Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/memory/CMSCollector.java @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | 89152779163c |
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rev | line source |
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0 | 1 /* |
17524 | 2 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 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 CMSCollector extends VMObject { | |
34 private static long markBitMapFieldOffset; | |
35 | |
36 public CMSCollector(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("CMSCollector"); | |
50 markBitMapFieldOffset = type.getField("_markBitMap").getOffset(); | |
51 } | |
52 | |
53 //Accessing mark bitmap | |
54 public CMSBitMap markBitMap() { | |
55 return (CMSBitMap) VMObjectFactory.newObject( | |
56 CMSBitMap.class, | |
57 addr.addOffsetTo(markBitMapFieldOffset)); | |
58 } | |
59 | |
60 public long blockSizeUsingPrintezisBits(Address addr) { | |
61 CMSBitMap markBitMap = markBitMap(); | |
62 long addressSize = VM.getVM().getAddressSize(); | |
63 if ( markBitMap.isMarked(addr) && markBitMap.isMarked(addr.addOffsetTo(1*addressSize)) ) { | |
64 Address nextOneAddr = markBitMap.getNextMarkedWordAddress(addr.addOffsetTo(2*addressSize)); | |
65 //return size in bytes | |
66 long size = (nextOneAddr.addOffsetTo(1*addressSize)).minus(addr); | |
67 return size; | |
68 } else { | |
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69 //missing Printezis marks |
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70 return -1; |
0 | 71 } |
72 | |
73 } | |
74 } |