Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/ObjectMonitor.java @ 3945:8ed53447f690
Merge
author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | c18cbe5936b8 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 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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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.debugger.*; | |
30 import sun.jvm.hotspot.oops.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 | |
33 public class ObjectMonitor 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) throws WrongTypeException { | |
43 heap = VM.getVM().getObjectHeap(); | |
44 Type type = db.lookupType("ObjectMonitor"); | |
45 sun.jvm.hotspot.types.Field f = type.getField("_header"); | |
46 headerFieldOffset = f.getOffset(); | |
47 f = type.getField("_object"); | |
48 objectFieldOffset = f.getOffset(); | |
49 f = type.getField("_owner"); | |
50 ownerFieldOffset = f.getOffset(); | |
51 f = type.getField("FreeNext"); | |
52 FreeNextFieldOffset = f.getOffset(); | |
53 countField = type.getCIntegerField("_count"); | |
54 waitersField = type.getCIntegerField("_waiters"); | |
55 recursionsField = type.getCIntegerField("_recursions"); | |
56 } | |
57 | |
58 public ObjectMonitor(Address addr) { | |
59 super(addr); | |
60 } | |
61 | |
62 public Mark header() { | |
63 return new Mark(addr.addOffsetTo(headerFieldOffset)); | |
64 } | |
65 | |
66 // FIXME | |
67 // void set_header(markOop hdr); | |
68 | |
69 // FIXME: must implement and delegate to platform-dependent implementation | |
70 // public boolean isBusy(); | |
71 public boolean isEntered(sun.jvm.hotspot.runtime.Thread current) { | |
72 Address o = owner(); | |
73 if (current.threadObjectAddress().equals(o) || | |
74 current.isLockOwned(o)) { | |
75 return true; | |
76 } | |
77 return false; | |
78 } | |
79 | |
80 public Address owner() { return addr.getAddressAt(ownerFieldOffset); } | |
81 // FIXME | |
82 // void set_owner(void* owner); | |
83 | |
84 public long waiters() { return waitersField.getValue(addr); } | |
85 | |
86 public Address freeNext() { return addr.getAddressAt(FreeNextFieldOffset); } | |
87 // FIXME | |
88 // void set_queue(void* owner); | |
89 | |
90 public long count() { return countField.getValue(addr); } | |
91 // FIXME | |
92 // void set_count(intptr_t count); | |
93 | |
94 public long recursions() { return recursionsField.getValue(addr); } | |
95 | |
96 public OopHandle object() { | |
97 return addr.getOopHandleAt(objectFieldOffset); | |
98 } | |
99 | |
100 public long contentions() { | |
101 // refer to objectMonitor_xxx.inline.hpp - contentions definition. | |
102 // for Solaris and Linux, contentions is same as count. for Windows | |
103 // it is different (objectMonitor_win32.inline.hpp) | |
104 long count = count(); | |
105 if (VM.getVM().getOS().equals("win32")) { | |
106 // don't count the owner of the monitor | |
107 return count > 0? count - 1 : 0; | |
108 } else { | |
109 // Solaris and Linux | |
110 return count; | |
111 } | |
112 } | |
113 | |
114 // FIXME | |
115 // void* object_addr(); | |
116 // void set_object(void* obj); | |
117 | |
118 // The following four either aren't expressed as typed fields in | |
119 // vmStructs.cpp because they aren't strongly typed in the VM, or | |
120 // would confuse the SA's type system. | |
121 private static ObjectHeap heap; | |
122 private static long headerFieldOffset; | |
123 private static long objectFieldOffset; | |
124 private static long ownerFieldOffset; | |
125 private static long FreeNextFieldOffset; | |
126 private static CIntegerField countField; | |
127 private static CIntegerField waitersField; | |
128 private static CIntegerField recursionsField; | |
129 // FIXME: expose platform-dependent stuff | |
130 } |