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comparison: src/share/vm/services/memTrackWorker.hpp
src/share/vm/services/memTrackWorker.hpp
- changeset 7074
- 833b0f92429a
- parent 5614
- 9758d9f36299
- child 6876
- 710a3c8b516e
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| 7073:4d3a43351904 | 7074:833b0f92429a |
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| 1 /* | |
| 2 * Copyright (c) 2013, 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_VM_SERVICES_MEM_TRACK_WORKER_HPP | |
| 26 #define SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "runtime/thread.hpp" | |
| 30 #include "services/memRecorder.hpp" | |
| 31 | |
| 32 // Maximum MAX_GENERATIONS generation data can be tracked. | |
| 33 #define MAX_GENERATIONS 512 | |
| 34 | |
| 35 class GenerationData VALUE_OBJ_CLASS_SPEC { | |
| 36 private: | |
| 37 int _number_of_classes; | |
| 38 MemRecorder* _recorder_list; | |
| 39 | |
| 40 public: | |
| 41 GenerationData(): _number_of_classes(0), _recorder_list(NULL) { } | |
| 42 | |
| 43 inline int number_of_classes() const { return _number_of_classes; } | |
| 44 inline void set_number_of_classes(long num) { _number_of_classes = num; } | |
| 45 | |
| 46 inline MemRecorder* next_recorder() { | |
| 47 if (_recorder_list == NULL) { | |
| 48 return NULL; | |
| 49 } else { | |
| 50 MemRecorder* tmp = _recorder_list; | |
| 51 _recorder_list = _recorder_list->next(); | |
| 52 return tmp; | |
| 53 } | |
| 54 } | |
| 55 | |
| 56 inline bool has_more_recorder() const { | |
| 57 return (_recorder_list != NULL); | |
| 58 } | |
| 59 | |
| 60 // add recorders to this generation | |
| 61 void add_recorders(MemRecorder* head) { | |
| 62 if (head != NULL) { | |
| 63 if (_recorder_list == NULL) { | |
| 64 _recorder_list = head; | |
| 65 } else { | |
| 66 MemRecorder* tmp = _recorder_list; | |
| 67 for (; tmp->next() != NULL; tmp = tmp->next()); | |
| 68 tmp->set_next(head); | |
| 69 } | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 void reset(); | |
| 74 | |
| 75 NOT_PRODUCT(MemRecorder* peek() const { return _recorder_list; }) | |
| 76 }; | |
| 77 | |
| 78 class MemTrackWorker : public NamedThread { | |
| 79 private: | |
| 80 // circular buffer. This buffer contains generation data to be merged into global | |
| 81 // snaphsot. | |
| 82 // Each slot holds a generation | |
| 83 GenerationData _gen[MAX_GENERATIONS]; | |
| 84 int _head, _tail; // head and tail pointers to above circular buffer | |
| 85 | |
| 86 bool _has_error; | |
| 87 | |
| 88 MemSnapshot* _snapshot; | |
| 89 | |
| 90 public: | |
| 91 MemTrackWorker(MemSnapshot* snapshot); | |
| 92 ~MemTrackWorker(); | |
| 93 _NOINLINE_ void* operator new(size_t size) throw(); | |
| 94 _NOINLINE_ void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw(); | |
| 95 | |
| 96 void start(); | |
| 97 void run(); | |
| 98 | |
| 99 inline bool has_error() const { return _has_error; } | |
| 100 | |
| 101 // task at synchronization point | |
| 102 void at_sync_point(MemRecorder* pending_recorders, int number_of_classes); | |
| 103 | |
| 104 // for debugging purpose, they are not thread safe. | |
| 105 NOT_PRODUCT(static int count_recorder(const MemRecorder* head);) | |
| 106 NOT_PRODUCT(int count_pending_recorders() const;) | |
| 107 | |
| 108 NOT_PRODUCT(int _sync_point_count;) | |
| 109 NOT_PRODUCT(int _merge_count;) | |
| 110 NOT_PRODUCT(int _last_gen_in_use;) | |
| 111 | |
| 112 // how many generations are queued | |
| 113 inline int generations_in_use() const { | |
| 114 return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1)); | |
| 115 } | |
| 116 }; | |
| 117 | |
| 118 #endif // SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP |
