1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/jfr/support/jfrFlush.hpp Mon Aug 12 18:30:40 2019 +0300
1.3 @@ -0,0 +1,77 @@
1.4 +/*
1.5 + * Copyright (c) 2016, 2018, 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_JFR_SUPPORT_JFRFLUSH_HPP
1.29 +#define SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
1.30 +
1.31 +#include "jfr/recorder/storage/jfrBuffer.hpp"
1.32 +#include "jfr/utilities/jfrTypes.hpp"
1.33 +#include "memory/allocation.hpp"
1.34 +
1.35 +class Thread;
1.36 +
1.37 +class JfrFlush : public StackObj {
1.38 + public:
1.39 + typedef JfrBuffer Type;
1.40 + JfrFlush(Type* old, size_t used, size_t requested, Thread* t);
1.41 + Type* result() const { return _result; }
1.42 + private:
1.43 + Type* _result;
1.44 +};
1.45 +
1.46 +void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t);
1.47 +bool jfr_is_event_enabled(JfrEventId id);
1.48 +bool jfr_has_stacktrace_enabled(JfrEventId id);
1.49 +bool jfr_save_stacktrace(Thread* t);
1.50 +void jfr_clear_stacktrace(Thread* t);
1.51 +
1.52 +template <typename Event>
1.53 +class JfrConditionalFlush {
1.54 + public:
1.55 + typedef JfrBuffer Type;
1.56 + JfrConditionalFlush(Thread* t) {
1.57 + if (jfr_is_event_enabled(Event::eventId)) {
1.58 + jfr_conditional_flush(Event::eventId, sizeof(Event), t);
1.59 + }
1.60 + }
1.61 +};
1.62 +
1.63 +template <typename Event>
1.64 +class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> {
1.65 + Thread* _t;
1.66 + bool _owner;
1.67 + public:
1.68 + JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) {
1.69 + if (Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
1.70 + _owner = jfr_save_stacktrace(t);
1.71 + }
1.72 + }
1.73 + ~JfrConditionalFlushWithStacktrace() {
1.74 + if (_owner) {
1.75 + jfr_clear_stacktrace(_t);
1.76 + }
1.77 + }
1.78 +};
1.79 +
1.80 +#endif // SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP
