Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/runtime/ConcurrentLocksPrinter.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. | |
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.runtime; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.memory.*; | |
30 import sun.jvm.hotspot.oops.*; | |
31 | |
32 public class ConcurrentLocksPrinter { | |
33 private Map locksMap = new HashMap(); // <JavaThread, List<Oop>> | |
34 | |
35 public ConcurrentLocksPrinter() { | |
36 fillLocks(); | |
37 } | |
38 | |
39 public void print(JavaThread jthread, PrintStream tty) { | |
40 List locks = (List) locksMap.get(jthread); | |
41 tty.println("Locked ownable synchronizers:"); | |
42 if (locks == null || locks.isEmpty()) { | |
43 tty.println(" - None"); | |
44 } else { | |
45 for (Iterator itr = locks.iterator(); itr.hasNext();) { | |
46 Oop oop = (Oop) itr.next(); | |
47 tty.println(" - <" + oop.getHandle() + ">, (a " + | |
48 oop.getKlass().getName().asString() + ")"); | |
49 } | |
50 } | |
51 } | |
52 | |
53 //-- Internals only below this point | |
54 private JavaThread getOwnerThread(Oop oop) { | |
55 Oop threadOop = OopUtilities.abstractOwnableSynchronizerGetOwnerThread(oop); | |
56 if (threadOop == null) { | |
57 return null; | |
58 } else { | |
59 return OopUtilities.threadOopGetJavaThread(threadOop); | |
60 } | |
61 } | |
62 | |
63 private void fillLocks() { | |
64 VM vm = VM.getVM(); | |
65 SystemDictionary sysDict = vm.getSystemDictionary(); | |
66 Klass absOwnSyncKlass = sysDict.getAbstractOwnableSynchronizerKlass(); | |
67 ObjectHeap heap = vm.getObjectHeap(); | |
68 // may be not loaded at all | |
69 if (absOwnSyncKlass != null) { | |
70 heap.iterateObjectsOfKlass(new DefaultHeapVisitor() { | |
71 public boolean doObj(Oop oop) { | |
72 JavaThread thread = getOwnerThread(oop); | |
73 if (thread != null) { | |
74 List locks = (List) locksMap.get(thread); | |
75 if (locks == null) { | |
76 locks = new LinkedList(); | |
77 locksMap.put(thread, locks); | |
78 } | |
79 locks.add(oop); | |
80 } | |
81 return false; | |
82 } | |
83 | |
84 }, absOwnSyncKlass, true); | |
85 } | |
86 } | |
87 } |