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1 /* |
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2 * Copyright (c) 2016, 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_SUPPORT_JFRFLUSH_HPP |
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26 #define SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP |
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27 |
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28 #include "jfr/recorder/storage/jfrBuffer.hpp" |
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29 #include "jfr/utilities/jfrTypes.hpp" |
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30 #include "memory/allocation.hpp" |
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31 |
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32 class Thread; |
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33 |
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34 class JfrFlush : public StackObj { |
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35 public: |
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36 typedef JfrBuffer Type; |
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37 JfrFlush(Type* old, size_t used, size_t requested, Thread* t); |
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38 Type* result() const { return _result; } |
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39 private: |
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40 Type* _result; |
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41 }; |
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42 |
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43 void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t); |
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44 bool jfr_is_event_enabled(JfrEventId id); |
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45 bool jfr_has_stacktrace_enabled(JfrEventId id); |
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46 bool jfr_save_stacktrace(Thread* t); |
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47 void jfr_clear_stacktrace(Thread* t); |
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48 |
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49 template <typename Event> |
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50 class JfrConditionalFlush { |
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51 public: |
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52 typedef JfrBuffer Type; |
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53 JfrConditionalFlush(Thread* t) { |
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54 if (jfr_is_event_enabled(Event::eventId)) { |
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55 jfr_conditional_flush(Event::eventId, sizeof(Event), t); |
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56 } |
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57 } |
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58 }; |
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59 |
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60 template <typename Event> |
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61 class JfrConditionalFlushWithStacktrace : public JfrConditionalFlush<Event> { |
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62 Thread* _t; |
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63 bool _owner; |
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64 public: |
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65 JfrConditionalFlushWithStacktrace(Thread* t) : JfrConditionalFlush<Event>(t), _t(t), _owner(false) { |
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66 if (Event::has_stacktrace() && jfr_has_stacktrace_enabled(Event::eventId)) { |
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67 _owner = jfr_save_stacktrace(t); |
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68 } |
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69 } |
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70 ~JfrConditionalFlushWithStacktrace() { |
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71 if (_owner) { |
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72 jfr_clear_stacktrace(_t); |
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73 } |
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74 } |
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75 }; |
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76 |
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77 #endif // SHARE_VM_JFR_SUPPORT_JFRFLUSH_HPP |