1/*
2 * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef SHARE_JFR_SUPPORT_JFRFLUSH_HPP
26#define SHARE_JFR_SUPPORT_JFRFLUSH_HPP
27
28#include "jfr/recorder/storage/jfrBuffer.hpp"
29#include "jfr/utilities/jfrTypes.hpp"
30#include "memory/allocation.hpp"
31
32class Thread;
33
34class JfrFlush : public StackObj {
35 public:
36 typedef JfrBuffer Type;
37 JfrFlush(Type* old, size_t used, size_t requested, Thread* t);
38 Type* result() const { return _result; }
39 private:
40 Type* _result;
41};
42
43void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t);
44bool jfr_is_event_enabled(JfrEventId id);
45bool jfr_has_stacktrace_enabled(JfrEventId id);
46bool jfr_save_stacktrace(Thread* t);
47void jfr_clear_stacktrace(Thread* t);
48
49template <typename Event>
50class JfrConditionalFlush {
51 protected:
52 bool _enabled;
53 public:
54 typedef JfrBuffer Type;
55 JfrConditionalFlush(Thread* t) : _enabled(jfr_is_event_enabled(Event::eventId)) {
56 if (_enabled) {
57 jfr_conditional_flush(Event::eventId, sizeof(Event), t);
58 }
59 }
60};
61
62template <typename Event>
63class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> {
64 Thread* _t;
65 bool _owner;
66 public:
67 JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) {
68 if (this->_enabled && Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) {
69 _owner = jfr_save_stacktrace(t);
70 }
71 }
72 ~JfrConditionalFlushWithStacktrace() {
73 if (_owner) {
74 jfr_clear_stacktrace(_t);
75 }
76 }
77};
78
79#endif // SHARE_JFR_SUPPORT_JFRFLUSH_HPP
80