| /* |
| * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP |
| #define SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "runtime/thread.hpp" |
| #include "services/memRecorder.hpp" |
| |
| // Maximum MAX_GENERATIONS generation data can be tracked. |
| #define MAX_GENERATIONS 512 |
| |
| class GenerationData VALUE_OBJ_CLASS_SPEC { |
| private: |
| int _number_of_classes; |
| MemRecorder* _recorder_list; |
| |
| public: |
| GenerationData(): _number_of_classes(0), _recorder_list(NULL) { } |
| |
| inline int number_of_classes() const { return _number_of_classes; } |
| inline void set_number_of_classes(long num) { _number_of_classes = num; } |
| |
| inline MemRecorder* next_recorder() { |
| if (_recorder_list == NULL) { |
| return NULL; |
| } else { |
| MemRecorder* tmp = _recorder_list; |
| _recorder_list = _recorder_list->next(); |
| return tmp; |
| } |
| } |
| |
| inline bool has_more_recorder() const { |
| return (_recorder_list != NULL); |
| } |
| |
| // add recorders to this generation |
| void add_recorders(MemRecorder* head) { |
| if (head != NULL) { |
| if (_recorder_list == NULL) { |
| _recorder_list = head; |
| } else { |
| MemRecorder* tmp = _recorder_list; |
| for (; tmp->next() != NULL; tmp = tmp->next()); |
| tmp->set_next(head); |
| } |
| } |
| } |
| |
| void reset(); |
| |
| NOT_PRODUCT(MemRecorder* peek() const { return _recorder_list; }) |
| }; |
| |
| class MemTrackWorker : public NamedThread { |
| private: |
| // circular buffer. This buffer contains generation data to be merged into global |
| // snaphsot. |
| // Each slot holds a generation |
| GenerationData _gen[MAX_GENERATIONS]; |
| int _head, _tail; // head and tail pointers to above circular buffer |
| |
| bool _has_error; |
| |
| MemSnapshot* _snapshot; |
| |
| public: |
| MemTrackWorker(MemSnapshot* snapshot); |
| ~MemTrackWorker(); |
| _NOINLINE_ void* operator new(size_t size); |
| _NOINLINE_ void* operator new(size_t size, const std::nothrow_t& nothrow_constant); |
| |
| void start(); |
| void run(); |
| |
| inline bool has_error() const { return _has_error; } |
| |
| // task at synchronization point |
| void at_sync_point(MemRecorder* pending_recorders, int number_of_classes); |
| |
| // for debugging purpose, they are not thread safe. |
| NOT_PRODUCT(static int count_recorder(const MemRecorder* head);) |
| NOT_PRODUCT(int count_pending_recorders() const;) |
| |
| NOT_PRODUCT(int _sync_point_count;) |
| NOT_PRODUCT(int _merge_count;) |
| NOT_PRODUCT(int _last_gen_in_use;) |
| |
| // how many generations are queued |
| inline int generations_in_use() const { |
| return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1)); |
| } |
| }; |
| |
| #endif // SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP |