Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiUtil.hpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
author | johnc |
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date | Wed, 12 Oct 2011 10:25:51 -0700 |
parents | f95d63e2154a |
children |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, 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 |
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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 | |
1972 | 25 #ifndef SHARE_VM_PRIMS_JVMTIUTIL_HPP |
26 #define SHARE_VM_PRIMS_JVMTIUTIL_HPP | |
27 | |
28 #include "jvmtifiles/jvmti.h" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "prims/jvmtiEventController.hpp" | |
31 | |
0 | 32 /////////////////////////////////////////////////////////////// |
33 // | |
34 // class JvmtiUtil | |
35 // | |
36 // class for miscellaneous jvmti utility static methods | |
37 // | |
38 | |
39 class JvmtiUtil : AllStatic { | |
40 | |
41 static ResourceArea* _single_threaded_resource_area; | |
42 | |
43 static const char* _error_names[]; | |
44 static const bool _event_threaded[]; | |
45 | |
46 public: | |
47 | |
48 static ResourceArea* single_threaded_resource_area(); | |
49 | |
50 static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking | |
51 | |
52 static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr); | |
53 | |
54 static const bool event_threaded(int num) { | |
55 if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) { | |
56 return _event_threaded[num]; | |
57 } | |
58 if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) { | |
59 return false; | |
60 } | |
61 ShouldNotReachHere(); | |
62 return false; | |
63 } | |
64 }; | |
65 | |
66 | |
67 /////////////////////////////////////////////////////////////// | |
68 // | |
69 // class SafeResourceMark | |
70 // | |
71 // ResourceMarks that work before threads exist | |
72 // | |
73 | |
74 class SafeResourceMark : public ResourceMark { | |
75 | |
76 ResourceArea* safe_resource_area() { | |
77 Thread* thread; | |
78 | |
79 if (Threads::number_of_threads() == 0) { | |
80 return JvmtiUtil::single_threaded_resource_area(); | |
81 } | |
82 thread = ThreadLocalStorage::thread(); | |
83 if (thread == NULL) { | |
84 return JvmtiUtil::single_threaded_resource_area(); | |
85 } | |
86 return thread->resource_area(); | |
87 } | |
88 | |
89 public: | |
90 | |
91 SafeResourceMark() : ResourceMark(safe_resource_area()) {} | |
92 | |
93 }; | |
1972 | 94 |
95 #endif // SHARE_VM_PRIMS_JVMTIUTIL_HPP |