Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/CMSCollector.java @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children |
| rev | line source |
|---|---|
| 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 } |