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1 /* |
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2 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP |
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26 #define SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP |
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27 |
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28 #include "jfr/utilities/jfrAllocation.hpp" |
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29 |
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30 class Monitor; |
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31 class JavaThread; |
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32 class JfrStackFrame; |
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33 class JfrThreadSampler; |
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34 class Thread; |
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35 |
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36 class JfrThreadSampling : public JfrCHeapObj { |
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37 friend class JfrRecorder; |
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38 private: |
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39 JfrThreadSampler* _sampler; |
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40 void start_sampler(size_t interval_java, size_t interval_native); |
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41 void set_sampling_interval(bool java_interval, size_t period); |
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42 |
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43 JfrThreadSampling(); |
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44 ~JfrThreadSampling(); |
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45 |
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46 static JfrThreadSampling& instance(); |
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47 static JfrThreadSampling* create(); |
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48 static void destroy(); |
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49 |
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50 public: |
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51 static void set_java_sample_interval(size_t period); |
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52 static void set_native_sample_interval(size_t period); |
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53 static void on_javathread_suspend(JavaThread* thread); |
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54 static Thread* sampler_thread(); |
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55 }; |
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56 |
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57 #endif // SHARE_VM_JFR_PERIODIC_SAMPLING_JFRTHREADSAMPLER_HPP |