1/*
2 * Copyright (c) 2012, 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.
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23 */
24
25#ifndef SHARE_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP
26#define SHARE_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP
27
28#include "jfr/utilities/jfrAllocation.hpp"
29
30class JavaThread;
31class JfrStackFrame;
32class JfrThreadSampler;
33class Thread;
34
35class JfrThreadSampling : public JfrCHeapObj {
36 friend class JfrRecorder;
37 private:
38 JfrThreadSampler* _sampler;
39 void start_sampler(size_t interval_java, size_t interval_native);
40 void set_sampling_interval(bool java_interval, size_t period);
41
42 JfrThreadSampling();
43 ~JfrThreadSampling();
44
45 static JfrThreadSampling& instance();
46 static JfrThreadSampling* create();
47 static void destroy();
48
49 public:
50 static void set_java_sample_interval(size_t period);
51 static void set_native_sample_interval(size_t period);
52 static void on_javathread_suspend(JavaThread* thread);
53};
54
55#endif // SHARE_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP
56