Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/ObjectSynchronizer.java @ 2195:bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
Summary: Defer posting events from the compiler thread: use service thread
Reviewed-by: coleenp, dholmes, never, dcubed
| author | kamg |
|---|---|
| date | Wed, 02 Feb 2011 14:38:01 -0500 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
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 } |