Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/memory/FreeChunk.java @ 904:ef671fb22f73
6868051: (SA) FreeChunk support for compressed oops is broken
Reviewed-by: kvn, dcubed
author | never |
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date | Thu, 06 Aug 2009 12:24:41 -0700 |
parents | d1605aabd0a1 |
children | 89e0543e1737 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2003-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
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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ef671fb22f73
6868051: (SA) FreeChunk support for compressed oops is broken
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diff
changeset
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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()) { |
904
ef671fb22f73
6868051: (SA) FreeChunk support for compressed oops is broken
never
parents:
196
diff
changeset
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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 } |