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comparison src/share/vm/trace/traceEvent.hpp @ 10405:f2110083203d

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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
date Mon, 10 Jun 2013 11:30:51 +0200
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children 86e6d691f2e1
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10404:d0add7016434 10405:f2110083203d
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 */