| /* |
| * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_TRACE_TRACEEVENT_HPP |
| #define SHARE_VM_TRACE_TRACEEVENT_HPP |
| |
| #include "trace/traceTime.hpp" |
| #include "utilities/macros.hpp" |
| |
| enum EventStartTime { |
| UNTIMED, |
| TIMED |
| }; |
| |
| #if INCLUDE_TRACE |
| #include "trace/traceBackend.hpp" |
| #include "tracefiles/traceEventIds.hpp" |
| #include "utilities/ticks.hpp" |
| |
| template<typename T> |
| class TraceEvent { |
| private: |
| bool _started; |
| |
| protected: |
| jlong _startTime; |
| jlong _endTime; |
| DEBUG_ONLY(bool _committed;) |
| |
| void set_starttime(const TracingTime& time) { |
| _startTime = time; |
| } |
| |
| void set_endtime(const TracingTime& time) { |
| _endTime = time; |
| } |
| |
| TraceEvent(EventStartTime timing=TIMED) : |
| _startTime(0), |
| _endTime(0), |
| _started(false) |
| #ifdef ASSERT |
| , _committed(false) |
| #endif |
| { |
| if (T::is_enabled()) { |
| _started = true; |
| if (TIMED == timing && !T::isInstant) { |
| static_cast<T*>(this)->set_starttime(Tracing::time()); |
| } |
| } |
| } |
| |
| public: |
| void set_starttime(const Ticks& time) { |
| _startTime = time.value(); |
| } |
| |
| void set_endtime(const Ticks& time) { |
| _endTime = time.value(); |
| } |
| |
| static bool is_enabled() { |
| return Tracing::is_event_enabled(T::eventId); |
| } |
| |
| bool should_commit() { |
| return _started; |
| } |
| |
| void commit() { |
| if (!should_commit()) { |
| return; |
| } |
| assert(!_committed, "event already committed"); |
| if (_startTime == 0) { |
| static_cast<T*>(this)->set_starttime(Tracing::time()); |
| } else if (_endTime == 0) { |
| static_cast<T*>(this)->set_endtime(Tracing::time()); |
| } |
| if (static_cast<T*>(this)->should_write()) { |
| static_cast<T*>(this)->writeEvent(); |
| DEBUG_ONLY(_committed = true;) |
| } |
| } |
| |
| static TraceEventId id() { |
| return T::eventId; |
| } |
| |
| static bool is_instant() { |
| return T::isInstant; |
| } |
| |
| static bool is_requestable() { |
| return T::isRequestable; |
| } |
| |
| static bool has_thread() { |
| return T::hasThread; |
| } |
| |
| static bool has_stacktrace() { |
| return T::hasStackTrace; |
| } |
| }; |
| |
| #endif // INCLUDE_TRACE |
| #endif // SHARE_VM_TRACE_TRACEEVENT_HPP |