Mercurial > hg > truffle
comparison src/share/vm/trace/traceEvent.hpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
author | sla |
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date | Mon, 10 Jun 2013 11:30:51 +0200 |
parents | |
children | 86e6d691f2e1 |
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1 /* | |
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 #ifndef SHARE_VM_TRACE_TRACEEVENT_HPP | |
26 #define SHARE_VM_TRACE_TRACEEVENT_HPP | |
27 | |
28 enum EventStartTime { | |
29 UNTIMED, | |
30 TIMED | |
31 }; | |
32 | |
33 #include "utilities/macros.hpp" | |
34 | |
35 #if INCLUDE_TRACE | |
36 | |
37 #include "trace/traceBackend.hpp" | |
38 #include "trace/tracing.hpp" | |
39 #include "tracefiles/traceEventIds.hpp" | |
40 #include "tracefiles/traceTypes.hpp" | |
41 | |
42 template<typename T> | |
43 class TraceEvent : public StackObj { | |
44 protected: | |
45 jlong _startTime; | |
46 jlong _endTime; | |
47 | |
48 private: | |
49 bool _started; | |
50 #ifdef ASSERT | |
51 bool _committed; | |
52 bool _cancelled; | |
53 protected: | |
54 bool _ignore_check; | |
55 #endif | |
56 | |
57 public: | |
58 TraceEvent(EventStartTime timing=TIMED) : | |
59 _startTime(0), | |
60 _endTime(0), | |
61 _started(false) | |
62 #ifdef ASSERT | |
63 , | |
64 _committed(false), | |
65 _cancelled(false), | |
66 _ignore_check(false) | |
67 #endif | |
68 { | |
69 if (T::is_enabled()) { | |
70 _started = true; | |
71 if (timing == TIMED && !T::isInstant) { | |
72 static_cast<T *>(this)->set_starttime(Tracing::time()); | |
73 } | |
74 } | |
75 } | |
76 | |
77 static bool is_enabled() { | |
78 return Tracing::is_event_enabled(T::eventId); | |
79 } | |
80 | |
81 bool should_commit() { | |
82 return _started; | |
83 } | |
84 | |
85 void ignoreCheck() { | |
86 DEBUG_ONLY(_ignore_check = true); | |
87 } | |
88 | |
89 void commit() { | |
90 if (!should_commit()) { | |
91 cancel(); | |
92 return; | |
93 } | |
94 if (_endTime == 0) { | |
95 static_cast<T*>(this)->set_endtime(Tracing::time()); | |
96 } | |
97 if (static_cast<T*>(this)->should_write()) { | |
98 static_cast<T*>(this)->writeEvent(); | |
99 } | |
100 set_commited(); | |
101 } | |
102 | |
103 void set_starttime(jlong time) { | |
104 _startTime = time; | |
105 } | |
106 | |
107 void set_endtime(jlong time) { | |
108 _endTime = time; | |
109 } | |
110 | |
111 TraceEventId id() const { | |
112 return T::eventId; | |
113 } | |
114 | |
115 bool is_instant() const { | |
116 return T::isInstant; | |
117 } | |
118 | |
119 bool is_requestable() const { | |
120 return T::isRequestable; | |
121 } | |
122 | |
123 bool has_thread() const { | |
124 return T::hasThread; | |
125 } | |
126 | |
127 bool has_stacktrace() const { | |
128 return T::hasStackTrace; | |
129 } | |
130 | |
131 void cancel() { | |
132 assert(!_committed && !_cancelled, "event was already committed/cancelled"); | |
133 DEBUG_ONLY(_cancelled = true); | |
134 } | |
135 | |
136 void set_commited() { | |
137 assert(!_committed, "event has already been committed"); | |
138 DEBUG_ONLY(_committed = true); | |
139 } | |
140 | |
141 ~TraceEvent() { | |
142 if (_started) { | |
143 assert(_ignore_check || _committed || _cancelled, "event was not committed/cancelled"); | |
144 } | |
145 } | |
146 }; | |
147 | |
148 #endif /* INCLUDE_TRACE */ | |
149 | |
150 #endif /* SHARE_VM_TRACE_TRACEEVENT_HPP */ |