Mercurial > hg > truffle
annotate src/share/vm/utilities/ticks.hpp @ 17977:0b9500028980
8029381: assert(is_method_type()) failed: bad cast
Summary: Access to method_type and appendix from constant pool (cpcache) needs to be guarded by is_f1_null() because of racy update/initialization.
Reviewed-by: kvn, coleenp, jrose
author | drchase |
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date | Mon, 02 Jun 2014 14:32:29 -0400 |
parents | 86e6d691f2e1 |
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1 /* |
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2 * Copyright (c) 2013, 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_UTILITIES_TICKS_HPP |
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26 #define SHARE_VM_UTILITIES_TICKS_HPP |
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27 |
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28 #include "memory/allocation.hpp" |
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29 #include "utilities/globalDefinitions.hpp" |
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30 |
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31 class Ticks; |
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32 |
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33 class Tickspan VALUE_OBJ_CLASS_SPEC { |
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34 friend class Ticks; |
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35 friend Tickspan operator-(const Ticks& end, const Ticks& start); |
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36 |
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37 private: |
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38 jlong _span_ticks; |
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39 |
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40 Tickspan(const Ticks& end, const Ticks& start); |
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41 |
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42 public: |
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43 Tickspan() : _span_ticks(0) {} |
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44 |
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45 Tickspan& operator+=(const Tickspan& rhs) { |
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46 _span_ticks += rhs._span_ticks; |
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47 return *this; |
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48 } |
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49 |
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50 jlong value() const { |
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51 return _span_ticks; |
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52 } |
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53 |
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54 }; |
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55 |
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56 class Ticks VALUE_OBJ_CLASS_SPEC { |
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57 private: |
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58 jlong _stamp_ticks; |
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59 |
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60 public: |
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61 Ticks() : _stamp_ticks(0) { |
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62 assert((_stamp_ticks = invalid_time_stamp) == invalid_time_stamp, |
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63 "initial unstamped time value assignment"); |
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64 } |
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65 |
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66 Ticks& operator+=(const Tickspan& span) { |
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67 _stamp_ticks += span.value(); |
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68 return *this; |
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69 } |
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70 |
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71 Ticks& operator-=(const Tickspan& span) { |
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72 _stamp_ticks -= span.value(); |
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73 return *this; |
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74 } |
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75 |
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76 void stamp(); |
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77 |
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78 jlong value() const { |
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79 return _stamp_ticks; |
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80 } |
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81 |
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82 static const Ticks now(); |
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83 |
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84 #ifdef ASSERT |
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85 static const jlong invalid_time_stamp; |
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86 #endif |
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87 |
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88 #ifndef PRODUCT |
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89 // only for internal use by GC VM tests |
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90 friend class TimePartitionPhasesIteratorTest; |
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91 friend class GCTimerTest; |
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92 |
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93 private: |
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94 // implicit type conversion |
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95 Ticks(int ticks) : _stamp_ticks(ticks) {} |
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96 |
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97 #endif // !PRODUCT |
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98 |
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99 }; |
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100 |
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101 class TicksToTimeHelper : public AllStatic { |
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102 public: |
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103 enum Unit { |
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104 SECONDS = 1, |
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105 MILLISECONDS = 1000 |
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106 }; |
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107 static double seconds(const Tickspan& span); |
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108 static jlong milliseconds(const Tickspan& span); |
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109 }; |
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110 |
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111 #endif // SHARE_VM_UTILITIES_TICKS_HPP |