Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/FreeChunk.java @ 17467:55fb97c4c58d hs25-b65
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
| author | mikael |
|---|---|
| date | Tue, 24 Dec 2013 11:48:39 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2009, 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.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.types.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 187 | 31 import sun.jvm.hotspot.oops.*; |
| 0 | 32 |
| 33 public class FreeChunk extends VMObject { | |
| 34 static { | |
| 35 VM.registerVMInitializedObserver(new Observer() { | |
| 36 public void update(Observable o, Object data) { | |
| 37 initialize(VM.getVM().getTypeDataBase()); | |
| 38 } | |
| 39 }); | |
| 40 } | |
| 41 | |
| 42 private static synchronized void initialize(TypeDataBase db) { | |
| 43 Type type = db.lookupType("FreeChunk"); | |
| 44 nextField = type.getAddressField("_next"); | |
| 45 prevField = type.getAddressField("_prev"); | |
| 187 | 46 sizeField = type.getAddressField("_size"); |
| 0 | 47 } |
| 48 | |
| 49 // Fields | |
| 50 private static AddressField nextField; | |
| 51 private static AddressField prevField; | |
| 187 | 52 private static AddressField sizeField; |
| 0 | 53 |
| 54 // Accessors | |
| 55 public FreeChunk next() { | |
| 56 return (FreeChunk) VMObjectFactory.newObject(FreeChunk.class, nextField.getValue(addr)); | |
| 57 } | |
| 58 | |
| 59 public FreeChunk prev() { | |
| 60 Address prev = prevField.getValue(addr).andWithMask(~0x3); | |
| 61 return (FreeChunk) VMObjectFactory.newObject(FreeChunk.class, prev); | |
| 62 } | |
| 63 | |
| 64 public long size() { | |
| 187 | 65 if (VM.getVM().isCompressedOopsEnabled()) { |
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66 Mark mark = new Mark(addr.addOffsetTo(sizeField.getOffset())); |
| 187 | 67 return mark.getSize(); |
| 68 } else { | |
| 69 Address size = sizeField.getValue(addr); | |
| 70 Debugger dbg = VM.getVM().getDebugger(); | |
| 71 return dbg.getAddressValue(size); | |
| 72 } | |
| 0 | 73 } |
| 74 | |
| 75 public FreeChunk(Address addr) { | |
| 76 super(addr); | |
| 77 } | |
| 78 | |
| 187 | 79 public static boolean indicatesFreeChunk(Address cur) { |
| 80 FreeChunk f = new FreeChunk(cur); | |
| 81 return f.isFree(); | |
| 0 | 82 } |
| 83 | |
| 84 public boolean isFree() { | |
| 187 | 85 if (VM.getVM().isCompressedOopsEnabled()) { |
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86 Mark mark = new Mark(addr.addOffsetTo(sizeField.getOffset())); |
| 187 | 87 return mark.isCmsFreeChunk(); |
| 88 } else { | |
| 89 Address prev = prevField.getValue(addr); | |
| 90 Debugger dbg = VM.getVM().getDebugger(); | |
| 91 long word = dbg.getAddressValue(prev); | |
| 92 return (word & 0x1L) == 0x1L; | |
| 93 } | |
| 0 | 94 } |
| 95 } |