Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/Threads.java @ 702:b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
Summary: Remove usage of _highest_lock field in Thread so that is_lock_owned won't depend on the correct update of that field.
Reviewed-by: never, dice, acorn
author | xlu |
---|---|
date | Mon, 06 Apr 2009 15:47:39 -0700 |
parents | a61af66fc99e |
children | bd02caa94611 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2000-2007 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.util.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.types.*; | |
30 import sun.jvm.hotspot.runtime.solaris_sparc.SolarisSPARCJavaThreadPDAccess; | |
31 import sun.jvm.hotspot.runtime.solaris_x86.SolarisX86JavaThreadPDAccess; | |
32 import sun.jvm.hotspot.runtime.solaris_amd64.SolarisAMD64JavaThreadPDAccess; | |
33 import sun.jvm.hotspot.runtime.win32_amd64.Win32AMD64JavaThreadPDAccess; | |
34 import sun.jvm.hotspot.runtime.win32_x86.Win32X86JavaThreadPDAccess; | |
35 import sun.jvm.hotspot.runtime.win32_ia64.Win32IA64JavaThreadPDAccess; | |
36 import sun.jvm.hotspot.runtime.linux_x86.LinuxX86JavaThreadPDAccess; | |
37 import sun.jvm.hotspot.runtime.linux_ia64.LinuxIA64JavaThreadPDAccess; | |
38 import sun.jvm.hotspot.runtime.linux_amd64.LinuxAMD64JavaThreadPDAccess; | |
39 import sun.jvm.hotspot.runtime.linux_sparc.LinuxSPARCJavaThreadPDAccess; | |
40 import sun.jvm.hotspot.utilities.*; | |
41 | |
42 public class Threads { | |
43 private static JavaThreadFactory threadFactory; | |
44 private static AddressField threadListField; | |
45 private static VirtualConstructor virtualConstructor; | |
46 private static JavaThreadPDAccess access; | |
47 | |
48 static { | |
49 VM.registerVMInitializedObserver(new Observer() { | |
50 public void update(Observable o, Object data) { | |
51 initialize(VM.getVM().getTypeDataBase()); | |
52 } | |
53 }); | |
54 } | |
55 | |
56 private static synchronized void initialize(TypeDataBase db) { | |
57 Type type = db.lookupType("Threads"); | |
58 | |
59 threadListField = type.getAddressField("_thread_list"); | |
60 | |
61 // Instantiate appropriate platform-specific JavaThreadFactory | |
62 String os = VM.getVM().getOS(); | |
63 String cpu = VM.getVM().getCPU(); | |
64 | |
65 access = null; | |
66 // FIXME: find the platform specific PD class by reflection? | |
67 if (os.equals("solaris")) { | |
68 if (cpu.equals("sparc")) { | |
69 access = new SolarisSPARCJavaThreadPDAccess(); | |
70 } else if (cpu.equals("x86")) { | |
71 access = new SolarisX86JavaThreadPDAccess(); | |
72 } else if (cpu.equals("amd64")) { | |
73 access = new SolarisAMD64JavaThreadPDAccess(); | |
74 } | |
75 } else if (os.equals("win32")) { | |
76 if (cpu.equals("x86")) { | |
77 access = new Win32X86JavaThreadPDAccess(); | |
78 } else if (cpu.equals("amd64")) { | |
79 access = new Win32AMD64JavaThreadPDAccess(); | |
80 } else if (cpu.equals("ia64")) { | |
81 access = new Win32IA64JavaThreadPDAccess(); | |
82 } | |
83 } else if (os.equals("linux")) { | |
84 if (cpu.equals("x86")) { | |
85 access = new LinuxX86JavaThreadPDAccess(); | |
86 } else if (cpu.equals("ia64")) { | |
87 access = new LinuxIA64JavaThreadPDAccess(); | |
88 } else if (cpu.equals("amd64")) { | |
89 access = new LinuxAMD64JavaThreadPDAccess(); | |
90 } else if (cpu.equals("sparc")) { | |
91 access = new LinuxSPARCJavaThreadPDAccess(); | |
92 } | |
93 | |
94 } | |
95 | |
96 if (access == null) { | |
97 throw new RuntimeException("OS/CPU combination " + os + "/" + cpu + | |
98 " not yet supported"); | |
99 } | |
100 | |
101 virtualConstructor = new VirtualConstructor(db); | |
102 // Add mappings for all known thread types | |
103 virtualConstructor.addMapping("JavaThread", JavaThread.class); | |
104 if (!VM.getVM().isCore()) { | |
105 virtualConstructor.addMapping("CompilerThread", CompilerThread.class); | |
106 } | |
107 // for now, use JavaThread itself. fix it later with appropriate class if needed | |
108 virtualConstructor.addMapping("SurrogateLockerThread", JavaThread.class); | |
109 virtualConstructor.addMapping("JvmtiAgentThread", JvmtiAgentThread.class); | |
110 virtualConstructor.addMapping("LowMemoryDetectorThread", LowMemoryDetectorThread.class); | |
111 } | |
112 | |
113 public Threads() { | |
114 } | |
115 | |
116 /** NOTE: this returns objects of type JavaThread, CompilerThread, | |
117 JvmtiAgentThread, and LowMemoryDetectorThread. | |
118 The latter four are subclasses of the former. Most operations | |
119 (fetching the top frame, etc.) are only allowed to be performed on | |
120 a "pure" JavaThread. For this reason, {@link | |
121 sun.jvm.hotspot.runtime.JavaThread#isJavaThread} has been | |
122 changed from the definition in the VM (which returns true for | |
123 all of these thread types) to return true for JavaThreads and | |
124 false for the three subclasses. FIXME: should reconsider the | |
125 inheritance hierarchy; see {@link | |
126 sun.jvm.hotspot.runtime.JavaThread#isJavaThread}. */ | |
127 public JavaThread first() { | |
128 Address threadAddr = threadListField.getValue(); | |
129 if (threadAddr == null) { | |
130 return null; | |
131 } | |
132 | |
133 return createJavaThreadWrapper(threadAddr); | |
134 } | |
135 | |
136 /** Routine for instantiating appropriately-typed wrapper for a | |
137 JavaThread. Currently needs to be public for OopUtilities to | |
138 access it. */ | |
139 public JavaThread createJavaThreadWrapper(Address threadAddr) { | |
140 try { | |
141 JavaThread thread = (JavaThread)virtualConstructor.instantiateWrapperFor(threadAddr); | |
142 thread.setThreadPDAccess(access); | |
143 return thread; | |
144 } catch (Exception e) { | |
145 throw new RuntimeException("Unable to deduce type of thread from address " + threadAddr + | |
146 " (expected type JavaThread, CompilerThread, LowMemoryDetectorThread, JvmtiAgentThread, or SurrogateLockerThread)", e); | |
147 } | |
148 } | |
149 | |
150 /** Memory operations */ | |
151 public void oopsDo(AddressVisitor oopVisitor) { | |
152 // FIXME: add more of VM functionality | |
153 for (JavaThread thread = first(); thread != null; thread = thread.next()) { | |
154 thread.oopsDo(oopVisitor); | |
155 } | |
156 } | |
157 | |
158 // refer to Threads::owning_thread_from_monitor_owner | |
159 public JavaThread owningThreadFromMonitor(Address o) { | |
160 if (o == null) return null; | |
161 for (JavaThread thread = first(); thread != null; thread = thread.next()) { | |
162 if (o.equals(thread.threadObjectAddress())) { | |
163 return thread; | |
164 } | |
165 } | |
166 | |
167 for (JavaThread thread = first(); thread != null; thread = thread.next()) { | |
702
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6699669: Hotspot server leaves synchronized block with monitor in bad state
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168 if (thread.isLockOwned(o)) |
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6699669: Hotspot server leaves synchronized block with monitor in bad state
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169 return thread; |
0 | 170 } |
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6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
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171 return null; |
0 | 172 } |
173 | |
174 public JavaThread owningThreadFromMonitor(ObjectMonitor monitor) { | |
175 return owningThreadFromMonitor(monitor.owner()); | |
176 } | |
177 | |
178 // refer to Threads::get_pending_threads | |
179 // Get list of Java threads that are waiting to enter the specified monitor. | |
180 public List getPendingThreads(ObjectMonitor monitor) { | |
181 List pendingThreads = new ArrayList(); | |
182 for (JavaThread thread = first(); thread != null; thread = thread.next()) { | |
183 if (thread.isCompilerThread()) { | |
184 continue; | |
185 } | |
186 ObjectMonitor pending = thread.getCurrentPendingMonitor(); | |
187 if (monitor.equals(pending)) { | |
188 pendingThreads.add(thread); | |
189 } | |
190 } | |
191 return pendingThreads; | |
192 } | |
193 | |
194 // Get list of Java threads that have called Object.wait on the specified monitor. | |
195 public List getWaitingThreads(ObjectMonitor monitor) { | |
196 List pendingThreads = new ArrayList(); | |
197 for (JavaThread thread = first(); thread != null; thread = thread.next()) { | |
198 ObjectMonitor waiting = thread.getCurrentWaitingMonitor(); | |
199 if (monitor.equals(waiting)) { | |
200 pendingThreads.add(thread); | |
201 } | |
202 } | |
203 return pendingThreads; | |
204 } | |
205 | |
206 // FIXME: add other accessors | |
207 } |