Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/Thread.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 /* |
|
2195
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
1552
diff
changeset
|
2 * Copyright (c) 2000, 2011, 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:
844
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
844
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:
844
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.types.*; | |
| 30 | |
| 31 public class Thread extends VMObject { | |
| 32 private static long tlabFieldOffset; | |
| 33 | |
| 34 private static CIntegerField suspendFlagsField; | |
| 35 // Thread::SuspendFlags enum constants | |
| 36 private static int EXTERNAL_SUSPEND; | |
| 37 private static int EXT_SUSPENDED; | |
| 38 private static int HAS_ASYNC_EXCEPTION; | |
| 39 | |
| 40 private static AddressField activeHandlesField; | |
| 41 private static AddressField currentPendingMonitorField; | |
| 42 private static AddressField currentWaitingMonitorField; | |
| 43 | |
| 44 static { | |
| 45 VM.registerVMInitializedObserver(new Observer() { | |
| 46 public void update(Observable o, Object data) { | |
| 47 initialize(VM.getVM().getTypeDataBase()); | |
| 48 } | |
| 49 }); | |
| 50 } | |
| 51 | |
| 52 private static synchronized void initialize(TypeDataBase db) { | |
| 53 Type type = db.lookupType("Thread"); | |
| 54 | |
| 55 suspendFlagsField = type.getCIntegerField("_suspend_flags"); | |
| 56 EXTERNAL_SUSPEND = db.lookupIntConstant("Thread::_external_suspend").intValue(); | |
| 57 EXT_SUSPENDED = db.lookupIntConstant("Thread::_ext_suspended").intValue(); | |
| 58 HAS_ASYNC_EXCEPTION = db.lookupIntConstant("Thread::_has_async_exception").intValue(); | |
| 59 | |
| 60 tlabFieldOffset = type.getField("_tlab").getOffset(); | |
| 61 activeHandlesField = type.getAddressField("_active_handles"); | |
| 62 currentPendingMonitorField = type.getAddressField("_current_pending_monitor"); | |
| 63 currentWaitingMonitorField = type.getAddressField("_current_waiting_monitor"); | |
| 64 } | |
| 65 | |
| 66 public Thread(Address addr) { | |
| 67 super(addr); | |
| 68 } | |
| 69 | |
| 70 public int suspendFlags() { | |
| 71 return (int) suspendFlagsField.getValue(addr); | |
| 72 } | |
| 73 | |
| 74 public boolean isExternalSuspend() { | |
| 75 return (suspendFlags() & EXTERNAL_SUSPEND) != 0; | |
| 76 } | |
| 77 | |
| 78 public boolean isExtSuspended() { | |
| 79 return (suspendFlags() & EXT_SUSPENDED) != 0; | |
| 80 } | |
| 81 | |
| 82 public boolean isBeingExtSuspended() { | |
| 83 return isExtSuspended() || isExternalSuspend(); | |
| 84 } | |
| 85 | |
| 86 // historical usage: checked for VM or external suspension | |
| 87 public boolean isAnySuspended() { | |
| 88 return isExtSuspended(); | |
| 89 } | |
| 90 | |
| 91 public boolean hasAsyncException() { | |
| 92 return (suspendFlags() & HAS_ASYNC_EXCEPTION) != 0; | |
| 93 } | |
| 94 | |
| 95 public ThreadLocalAllocBuffer tlab() { | |
| 96 return new ThreadLocalAllocBuffer(addr.addOffsetTo(tlabFieldOffset)); | |
| 97 } | |
| 98 | |
| 99 public JNIHandleBlock activeHandles() { | |
| 100 Address a = activeHandlesField.getAddress(addr); | |
| 101 if (a == null) { | |
| 102 return null; | |
| 103 } | |
| 104 return new JNIHandleBlock(a); | |
| 105 } | |
| 106 | |
| 107 public boolean isVMThread() { return false; } | |
| 108 public boolean isJavaThread() { return false; } | |
| 109 public boolean isCompilerThread() { return false; } | |
| 110 public boolean isHiddenFromExternalView() { return false; } | |
| 111 public boolean isJvmtiAgentThread() { return false; } | |
| 112 public boolean isWatcherThread() { return false; } | |
| 113 public boolean isConcurrentMarkSweepThread() { return false; } | |
|
2195
bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
kamg
parents:
1552
diff
changeset
|
114 public boolean isServiceThread() { return false; } |
| 0 | 115 |
| 116 /** Memory operations */ | |
| 117 public void oopsDo(AddressVisitor oopVisitor) { | |
| 118 // FIXME: Empty for now; will later traverse JNI handles and | |
| 119 // pending exception | |
| 120 } | |
| 121 | |
| 122 public ObjectMonitor getCurrentPendingMonitor() { | |
| 123 Address monitorAddr = currentPendingMonitorField.getValue(addr); | |
| 124 if (monitorAddr == null) { | |
| 125 return null; | |
| 126 } | |
| 127 return new ObjectMonitor(monitorAddr); | |
| 128 } | |
| 129 | |
| 130 public ObjectMonitor getCurrentWaitingMonitor() { | |
| 131 Address monitorAddr = currentWaitingMonitorField.getValue(addr); | |
| 132 if (monitorAddr == null) { | |
| 133 return null; | |
| 134 } | |
| 135 return new ObjectMonitor(monitorAddr); | |
| 136 } | |
| 137 | |
| 138 public boolean isLockOwned(Address lock) { | |
| 139 if (isInStack(lock)) return true; | |
| 140 return false; | |
| 141 } | |
| 142 | |
| 143 public boolean isInStack(Address a) { | |
| 144 // In the Serviceability Agent we need access to the thread's | |
| 145 // stack pointer to be able to answer this question. Since it is | |
| 146 // only a debugging system at the moment we need access to the | |
| 147 // underlying thread, which is only present for Java threads; see | |
| 148 // JavaThread.java. | |
| 149 return false; | |
| 150 } | |
| 151 | |
| 152 /** Assistance for ObjectMonitor implementation */ | |
| 153 Address threadObjectAddress() { return addr; } | |
| 154 } |