Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/ObjectSynchronizer.java @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
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date | Tue, 05 Apr 2011 14:12:31 -0700 |
parents | c18cbe5936b8 |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2007, 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 |
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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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import java.util.*; | |
28 | |
29 import sun.jvm.hotspot.oops.*; | |
30 import sun.jvm.hotspot.utilities.*; | |
31 import sun.jvm.hotspot.debugger.*; | |
32 import sun.jvm.hotspot.types.*; | |
33 | |
34 public class ObjectSynchronizer { | |
35 static { | |
36 VM.registerVMInitializedObserver(new Observer() { | |
37 public void update(Observable o, Object data) { | |
38 initialize(VM.getVM().getTypeDataBase()); | |
39 } | |
40 }); | |
41 } | |
42 | |
43 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
44 Type type; | |
45 try { | |
46 type = db.lookupType("ObjectSynchronizer"); | |
47 AddressField blockListField; | |
48 blockListField = type.getAddressField("gBlockList"); | |
49 gBlockListAddr = blockListField.getValue(); | |
50 blockSize = db.lookupIntConstant("ObjectSynchronizer::_BLOCKSIZE").intValue(); | |
51 } catch (RuntimeException e) { } | |
52 type = db.lookupType("ObjectMonitor"); | |
53 objectMonitorTypeSize = type.getSize(); | |
54 } | |
55 | |
56 public long identityHashValueFor(Oop obj) { | |
57 Mark mark = obj.getMark(); | |
58 if (mark.isUnlocked()) { | |
59 // FIXME: can not generate marks in debugging system | |
60 return mark.hash(); | |
61 } else if (mark.hasMonitor()) { | |
62 ObjectMonitor monitor = mark.monitor(); | |
63 Mark temp = monitor.header(); | |
64 return temp.hash(); | |
65 } else { | |
66 if (Assert.ASSERTS_ENABLED) { | |
67 Assert.that(VM.getVM().isDebugging(), "Can not access displaced header otherwise"); | |
68 } | |
69 if (mark.hasDisplacedMarkHelper()) { | |
70 Mark temp = mark.displacedMarkHelper(); | |
71 return temp.hash(); | |
72 } | |
73 // FIXME: can not do anything else here in debugging system | |
74 return 0; | |
75 } | |
76 } | |
77 | |
78 public static Iterator objectMonitorIterator() { | |
79 if (gBlockListAddr != null) { | |
80 return new ObjectMonitorIterator(); | |
81 } else { | |
82 return null; | |
83 } | |
84 } | |
85 | |
86 private static class ObjectMonitorIterator implements Iterator { | |
87 | |
88 // JVMTI raw monitors are not pointed by gBlockList | |
89 // and are not included by this Iterator. May add them later. | |
90 | |
91 ObjectMonitorIterator() { | |
92 blockAddr = gBlockListAddr; | |
93 index = blockSize - 1; | |
94 block = new ObjectMonitor(blockAddr); | |
95 } | |
96 | |
97 public boolean hasNext() { | |
98 return (index > 0 || block.freeNext() != null); | |
99 } | |
100 | |
101 public Object next() { | |
102 Address addr; | |
103 if (index > 0) { | |
104 addr = blockAddr.addOffsetTo(index*objectMonitorTypeSize); | |
105 } else { | |
106 blockAddr = block.freeNext(); | |
107 index = blockSize - 1; | |
108 addr = blockAddr.addOffsetTo(index*objectMonitorTypeSize); | |
109 } | |
110 index --; | |
111 return new ObjectMonitor(addr); | |
112 } | |
113 | |
114 public void remove() { | |
115 throw new UnsupportedOperationException(); | |
116 } | |
117 | |
118 private ObjectMonitor block; | |
119 private int index; | |
120 private Address blockAddr; | |
121 } | |
122 | |
123 private static Address gBlockListAddr; | |
124 private static int blockSize; | |
125 private static long objectMonitorTypeSize; | |
126 | |
127 } |