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comparison: src/share/vm/trace/traceEvent.hpp
src/share/vm/trace/traceEvent.hpp
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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 #include "utilities/macros.hpp" | |
| 29 | |
| 30 enum EventStartTime { | |
| 31 UNTIMED, | |
| 32 TIMED | |
| 33 }; | |
| 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 #include "utilities/ticks.hpp" | |
| 42 | |
| 43 template<typename T> | |
| 44 class TraceEvent : public StackObj { | |
| 45 private: | |
| 46 bool _started; | |
| 47 #ifdef ASSERT | |
| 48 bool _committed; | |
| 49 bool _cancelled; | |
| 50 protected: | |
| 51 bool _ignore_check; | |
| 52 #endif | |
| 53 | |
| 54 protected: | |
| 55 jlong _startTime; | |
| 56 jlong _endTime; | |
| 57 | |
| 58 void set_starttime(const TracingTime& time) { | |
| 59 _startTime = time; | |
| 60 } | |
| 61 | |
| 62 void set_endtime(const TracingTime& time) { | |
| 63 _endTime = time; | |
| 64 } | |
| 65 | |
| 66 public: | |
| 67 TraceEvent(EventStartTime timing=TIMED) : | |
| 68 _startTime(0), | |
| 69 _endTime(0), | |
| 70 _started(false) | |
| 71 #ifdef ASSERT | |
| 72 , | |
| 73 _committed(false), | |
| 74 _cancelled(false), | |
| 75 _ignore_check(false) | |
| 76 #endif | |
| 77 { | |
| 78 if (T::is_enabled()) { | |
| 79 _started = true; | |
| 80 if (timing == TIMED && !T::isInstant) { | |
| 81 static_cast<T *>(this)->set_starttime(Tracing::time()); | |
| 82 } | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 static bool is_enabled() { | |
| 87 return Tracing::is_event_enabled(T::eventId); | |
| 88 } | |
| 89 | |
| 90 bool should_commit() { | |
| 91 return _started; | |
| 92 } | |
| 93 | |
| 94 void ignoreCheck() { | |
| 95 DEBUG_ONLY(_ignore_check = true); | |
| 96 } | |
| 97 | |
| 98 void commit() { | |
| 99 if (!should_commit()) { | |
| 100 cancel(); | |
| 101 return; | |
| 102 } | |
| 103 if (_endTime == 0) { | |
| 104 static_cast<T*>(this)->set_endtime(Tracing::time()); | |
| 105 } | |
| 106 if (static_cast<T*>(this)->should_write()) { | |
| 107 static_cast<T*>(this)->writeEvent(); | |
| 108 } | |
| 109 set_commited(); | |
| 110 } | |
| 111 | |
| 112 void set_starttime(const Ticks& time) { | |
| 113 _startTime = time.value(); | |
| 114 } | |
| 115 | |
| 116 void set_endtime(const Ticks& time) { | |
| 117 _endTime = time.value(); | |
| 118 } | |
| 119 | |
| 120 TraceEventId id() const { | |
| 121 return T::eventId; | |
| 122 } | |
| 123 | |
| 124 bool is_instant() const { | |
| 125 return T::isInstant; | |
| 126 } | |
| 127 | |
| 128 bool is_requestable() const { | |
| 129 return T::isRequestable; | |
| 130 } | |
| 131 | |
| 132 bool has_thread() const { | |
| 133 return T::hasThread; | |
| 134 } | |
| 135 | |
| 136 bool has_stacktrace() const { | |
| 137 return T::hasStackTrace; | |
| 138 } | |
| 139 | |
| 140 void cancel() { | |
| 141 assert(!_committed && !_cancelled, "event was already committed/cancelled"); | |
| 142 DEBUG_ONLY(_cancelled = true); | |
| 143 } | |
| 144 | |
| 145 void set_commited() { | |
| 146 assert(!_committed, "event has already been committed"); | |
| 147 DEBUG_ONLY(_committed = true); | |
| 148 } | |
| 149 | |
| 150 ~TraceEvent() { | |
| 151 if (_started) { | |
| 152 assert(_ignore_check || _committed || _cancelled, "event was not committed/cancelled"); | |
| 153 } | |
| 154 } | |
| 155 }; | |
| 156 | |
| 157 #endif /* INCLUDE_TRACE */ | |
| 158 | |
| 159 #endif /* SHARE_VM_TRACE_TRACEEVENT_HPP */ |
