| /* |
| * Copyright (c) 2016, 2018, 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_JFR_SUPPORT_JFRFLUSH_HPP |
| #define SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP |
| |
| #include "jfr/recorder/storage/jfrBuffer.hpp" |
| #include "jfr/utilities/jfrTypes.hpp" |
| #include "memory/allocation.hpp" |
| |
| class Thread; |
| |
| class JfrFlush : public StackObj { |
| public: |
| typedef JfrBuffer Type; |
| JfrFlush(Type* old, size_t used, size_t requested, Thread* t); |
| Type* result() const { return _result; } |
| private: |
| Type* _result; |
| }; |
| |
| void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t); |
| bool jfr_is_event_enabled(JfrEventId id); |
| bool jfr_has_stacktrace_enabled(JfrEventId id); |
| bool jfr_save_stacktrace(Thread* t); |
| void jfr_clear_stacktrace(Thread* t); |
| |
| template <typename Event> |
| class JfrConditionalFlush { |
| public: |
| typedef JfrBuffer Type; |
| JfrConditionalFlush(Thread* t) { |
| if (jfr_is_event_enabled(Event::eventId)) { |
| jfr_conditional_flush(Event::eventId, sizeof(Event), t); |
| } |
| } |
| }; |
| |
| template <typename Event> |
| class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> { |
| Thread* _t; |
| bool _owner; |
| public: |
| JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) { |
| if (Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) { |
| _owner = jfr_save_stacktrace(t); |
| } |
| } |
| ~JfrConditionalFlushWithStacktrace() { |
| if (_owner) { |
| jfr_clear_stacktrace(_t); |
| } |
| } |
| }; |
| |
| #endif // SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP |