1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/trace/traceEvent.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,159 @@
1.4 +/*
1.5 + * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_TRACE_TRACEEVENT_HPP
1.29 +#define SHARE_VM_TRACE_TRACEEVENT_HPP
1.30 +
1.31 +#include "utilities/macros.hpp"
1.32 +
1.33 +enum EventStartTime {
1.34 + UNTIMED,
1.35 + TIMED
1.36 +};
1.37 +
1.38 +#if INCLUDE_TRACE
1.39 +
1.40 +#include "trace/traceBackend.hpp"
1.41 +#include "trace/tracing.hpp"
1.42 +#include "tracefiles/traceEventIds.hpp"
1.43 +#include "tracefiles/traceTypes.hpp"
1.44 +#include "utilities/ticks.hpp"
1.45 +
1.46 +template<typename T>
1.47 +class TraceEvent : public StackObj {
1.48 + private:
1.49 + bool _started;
1.50 +#ifdef ASSERT
1.51 + bool _committed;
1.52 + bool _cancelled;
1.53 + protected:
1.54 + bool _ignore_check;
1.55 +#endif
1.56 +
1.57 + protected:
1.58 + jlong _startTime;
1.59 + jlong _endTime;
1.60 +
1.61 + void set_starttime(const TracingTime& time) {
1.62 + _startTime = time;
1.63 + }
1.64 +
1.65 + void set_endtime(const TracingTime& time) {
1.66 + _endTime = time;
1.67 + }
1.68 +
1.69 + public:
1.70 + TraceEvent(EventStartTime timing=TIMED) :
1.71 + _startTime(0),
1.72 + _endTime(0),
1.73 + _started(false)
1.74 +#ifdef ASSERT
1.75 + ,
1.76 + _committed(false),
1.77 + _cancelled(false),
1.78 + _ignore_check(false)
1.79 +#endif
1.80 + {
1.81 + if (T::is_enabled()) {
1.82 + _started = true;
1.83 + if (timing == TIMED && !T::isInstant) {
1.84 + static_cast<T *>(this)->set_starttime(Tracing::time());
1.85 + }
1.86 + }
1.87 + }
1.88 +
1.89 + static bool is_enabled() {
1.90 + return Tracing::is_event_enabled(T::eventId);
1.91 + }
1.92 +
1.93 + bool should_commit() {
1.94 + return _started;
1.95 + }
1.96 +
1.97 + void ignoreCheck() {
1.98 + DEBUG_ONLY(_ignore_check = true);
1.99 + }
1.100 +
1.101 + void commit() {
1.102 + if (!should_commit()) {
1.103 + cancel();
1.104 + return;
1.105 + }
1.106 + if (_endTime == 0) {
1.107 + static_cast<T*>(this)->set_endtime(Tracing::time());
1.108 + }
1.109 + if (static_cast<T*>(this)->should_write()) {
1.110 + static_cast<T*>(this)->writeEvent();
1.111 + }
1.112 + set_commited();
1.113 + }
1.114 +
1.115 + void set_starttime(const Ticks& time) {
1.116 + _startTime = time.value();
1.117 + }
1.118 +
1.119 + void set_endtime(const Ticks& time) {
1.120 + _endTime = time.value();
1.121 + }
1.122 +
1.123 + TraceEventId id() const {
1.124 + return T::eventId;
1.125 + }
1.126 +
1.127 + bool is_instant() const {
1.128 + return T::isInstant;
1.129 + }
1.130 +
1.131 + bool is_requestable() const {
1.132 + return T::isRequestable;
1.133 + }
1.134 +
1.135 + bool has_thread() const {
1.136 + return T::hasThread;
1.137 + }
1.138 +
1.139 + bool has_stacktrace() const {
1.140 + return T::hasStackTrace;
1.141 + }
1.142 +
1.143 + void cancel() {
1.144 + assert(!_committed && !_cancelled, "event was already committed/cancelled");
1.145 + DEBUG_ONLY(_cancelled = true);
1.146 + }
1.147 +
1.148 + void set_commited() {
1.149 + assert(!_committed, "event has already been committed");
1.150 + DEBUG_ONLY(_committed = true);
1.151 + }
1.152 +
1.153 + ~TraceEvent() {
1.154 + if (_started) {
1.155 + assert(_ignore_check || _committed || _cancelled, "event was not committed/cancelled");
1.156 + }
1.157 + }
1.158 +};
1.159 +
1.160 +#endif /* INCLUDE_TRACE */
1.161 +
1.162 +#endif /* SHARE_VM_TRACE_TRACEEVENT_HPP */
