Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/memory/HeapBlock.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
| children |
| rev | line source |
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| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 2005, 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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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6941466: Oracle rebranding changes for Hotspot repositories
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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.runtime.*; | |
| 30 import sun.jvm.hotspot.types.*; | |
| 31 | |
| 32 public class HeapBlock extends VMObject { | |
| 33 private static long heapBlockSize; | |
| 34 private static Field headerField; | |
| 35 // Fields for class Header | |
| 36 private static CIntegerField headerLengthField; | |
| 37 private static CIntegerField headerUsedField; | |
| 38 | |
| 39 static { | |
| 40 VM.registerVMInitializedObserver(new Observer() { | |
| 41 public void update(Observable o, Object data) { | |
| 42 initialize(VM.getVM().getTypeDataBase()); | |
| 43 } | |
| 44 }); | |
| 45 } | |
| 46 | |
| 47 private static void initialize(TypeDataBase db) { | |
| 48 // HeapBlock | |
| 49 Type type = db.lookupType("HeapBlock"); | |
| 50 heapBlockSize = type.getSize(); | |
| 51 headerField = type.getField("_header"); | |
| 52 | |
| 53 // Header | |
| 54 type = db.lookupType("HeapBlock::Header"); | |
| 55 headerLengthField = type.getCIntegerField("_length"); | |
| 56 headerUsedField = type.getCIntegerField("_used"); | |
| 57 } | |
| 58 | |
| 59 public HeapBlock(Address addr) { | |
| 60 super(addr); | |
| 61 } | |
| 62 | |
| 63 public long getLength() { | |
| 64 return getHeader().getLength(); | |
| 65 } | |
| 66 | |
| 67 public boolean isFree() { | |
| 68 return getHeader().isFree(); | |
| 69 } | |
| 70 | |
| 71 public Address getAllocatedSpace() { | |
| 72 return addr.addOffsetTo(heapBlockSize); | |
| 73 } | |
| 74 | |
| 75 //-------------------------------------------------------------------------------- | |
| 76 // Internals only below this point | |
| 77 // | |
| 78 | |
| 79 public static class Header extends VMObject { | |
| 80 public Header(Address addr) { | |
| 81 super(addr); | |
| 82 } | |
| 83 | |
| 84 public long getLength() { | |
| 85 return headerLengthField.getValue(addr); | |
| 86 } | |
| 87 | |
| 88 public boolean isFree() { | |
| 89 return (headerUsedField.getValue(addr) == 0); | |
| 90 } | |
| 91 } | |
| 92 | |
| 93 private Header getHeader() { | |
| 94 return (Header) VMObjectFactory.newObject(HeapBlock.Header.class, addr.addOffsetTo(headerField.getOffset())); | |
| 95 } | |
| 96 } |