Tue, 08 Jan 2013 14:04:25 -0500
8005048: NMT: #loaded classes needs to just show the # defined classes
Summary: Count number of instance classes so that it matches class metadata size
Reviewed-by: coleenp, acorn
1 /*
2 * Copyright (c) 2012, 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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP
26 #define SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP
28 #include "memory/allocation.hpp"
29 #include "runtime/thread.hpp"
30 #include "services/memRecorder.hpp"
32 // Maximum MAX_GENERATIONS generation data can be tracked.
33 #define MAX_GENERATIONS 512
35 class GenerationData : public _ValueObj {
36 private:
37 int _number_of_classes;
38 MemRecorder* _recorder_list;
40 public:
41 GenerationData(): _number_of_classes(0), _recorder_list(NULL) { }
43 inline int number_of_classes() const { return _number_of_classes; }
44 inline void set_number_of_classes(long num) { _number_of_classes = num; }
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 }
56 inline bool has_more_recorder() const {
57 return (_recorder_list != NULL);
58 }
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 }
73 void reset();
75 NOT_PRODUCT(MemRecorder* peek() const { return _recorder_list; })
76 };
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
86 bool _has_error;
88 public:
89 MemTrackWorker();
90 ~MemTrackWorker();
91 _NOINLINE_ void* operator new(size_t size);
92 _NOINLINE_ void* operator new(size_t size, const std::nothrow_t& nothrow_constant);
94 void start();
95 void run();
97 inline bool has_error() const { return _has_error; }
99 // task at synchronization point
100 void at_sync_point(MemRecorder* pending_recorders, int number_of_classes);
102 // for debugging purpose, they are not thread safe.
103 NOT_PRODUCT(static int count_recorder(const MemRecorder* head);)
104 NOT_PRODUCT(int count_pending_recorders() const;)
106 NOT_PRODUCT(int _sync_point_count;)
107 NOT_PRODUCT(int _merge_count;)
108 NOT_PRODUCT(int _last_gen_in_use;)
110 inline int generations_in_use() const {
111 return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1));
112 }
113 };
115 #endif // SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP