1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/services/memTrackWorker.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,118 @@
1.4 +/*
1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP
1.29 +#define SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "runtime/thread.hpp"
1.33 +#include "services/memRecorder.hpp"
1.34 +
1.35 +// Maximum MAX_GENERATIONS generation data can be tracked.
1.36 +#define MAX_GENERATIONS 512
1.37 +
1.38 +class GenerationData VALUE_OBJ_CLASS_SPEC {
1.39 + private:
1.40 + int _number_of_classes;
1.41 + MemRecorder* _recorder_list;
1.42 +
1.43 + public:
1.44 + GenerationData(): _number_of_classes(0), _recorder_list(NULL) { }
1.45 +
1.46 + inline int number_of_classes() const { return _number_of_classes; }
1.47 + inline void set_number_of_classes(long num) { _number_of_classes = num; }
1.48 +
1.49 + inline MemRecorder* next_recorder() {
1.50 + if (_recorder_list == NULL) {
1.51 + return NULL;
1.52 + } else {
1.53 + MemRecorder* tmp = _recorder_list;
1.54 + _recorder_list = _recorder_list->next();
1.55 + return tmp;
1.56 + }
1.57 + }
1.58 +
1.59 + inline bool has_more_recorder() const {
1.60 + return (_recorder_list != NULL);
1.61 + }
1.62 +
1.63 + // add recorders to this generation
1.64 + void add_recorders(MemRecorder* head) {
1.65 + if (head != NULL) {
1.66 + if (_recorder_list == NULL) {
1.67 + _recorder_list = head;
1.68 + } else {
1.69 + MemRecorder* tmp = _recorder_list;
1.70 + for (; tmp->next() != NULL; tmp = tmp->next());
1.71 + tmp->set_next(head);
1.72 + }
1.73 + }
1.74 + }
1.75 +
1.76 + void reset();
1.77 +
1.78 + NOT_PRODUCT(MemRecorder* peek() const { return _recorder_list; })
1.79 +};
1.80 +
1.81 +class MemTrackWorker : public NamedThread {
1.82 + private:
1.83 + // circular buffer. This buffer contains generation data to be merged into global
1.84 + // snaphsot.
1.85 + // Each slot holds a generation
1.86 + GenerationData _gen[MAX_GENERATIONS];
1.87 + int _head, _tail; // head and tail pointers to above circular buffer
1.88 +
1.89 + bool _has_error;
1.90 +
1.91 + MemSnapshot* _snapshot;
1.92 +
1.93 + public:
1.94 + MemTrackWorker(MemSnapshot* snapshot);
1.95 + ~MemTrackWorker();
1.96 + _NOINLINE_ void* operator new(size_t size) throw();
1.97 + _NOINLINE_ void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw();
1.98 +
1.99 + void start();
1.100 + void run();
1.101 +
1.102 + inline bool has_error() const { return _has_error; }
1.103 +
1.104 + // task at synchronization point
1.105 + void at_sync_point(MemRecorder* pending_recorders, int number_of_classes);
1.106 +
1.107 + // for debugging purpose, they are not thread safe.
1.108 + NOT_PRODUCT(static int count_recorder(const MemRecorder* head);)
1.109 + NOT_PRODUCT(int count_pending_recorders() const;)
1.110 +
1.111 + NOT_PRODUCT(int _sync_point_count;)
1.112 + NOT_PRODUCT(int _merge_count;)
1.113 + NOT_PRODUCT(int _last_gen_in_use;)
1.114 +
1.115 + // how many generations are queued
1.116 + inline int generations_in_use() const {
1.117 + return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1));
1.118 + }
1.119 +};
1.120 +
1.121 +#endif // SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP
