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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
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#define SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
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#include "jfr/recorder/storage/jfrBuffer.hpp"
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#include "jfr/utilities/jfrTypes.hpp"
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#include "memory/allocation.hpp"
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class Thread;
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class JfrFlush : public StackObj {
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public:
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typedef JfrBuffer Type;
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JfrFlush(Type* old, size_t used, size_t requested, Thread* t);
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Type* result() const { return _result; }
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private:
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Type* _result;
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};
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void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t);
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bool jfr_is_event_enabled(JfrEventId id);
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bool jfr_has_stacktrace_enabled(JfrEventId id);
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bool jfr_save_stacktrace(Thread* t);
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void jfr_clear_stacktrace(Thread* t);
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template <typename Event>
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class JfrConditionalFlush {
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public:
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typedef JfrBuffer Type;
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JfrConditionalFlush(Thread* t) {
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if (jfr_is_event_enabled(Event::eventId)) {
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jfr_conditional_flush(Event::eventId, sizeof(Event), t);
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}
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}
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};
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template <typename Event>
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class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> {
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Thread* _t;
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bool _owner;
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public:
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JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) {
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if (Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
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_owner = jfr_save_stacktrace(t);
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}
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}
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~JfrConditionalFlushWithStacktrace() {
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if (_owner) {
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jfr_clear_stacktrace(_t);
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}
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}
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};
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#endif // SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
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