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comparison src/share/vm/services/memTrackWorker.hpp @ 6275:957c266d8bc5

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Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
author Doug Simon <doug.simon@oracle.com>
date Tue, 21 Aug 2012 10:39:19 +0200
parents 7e5976e66c62
children ecd24264898b
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5891:fd8832ae511d 6275:957c266d8bc5
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.
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
36 class MemTrackWorker : public NamedThread {
37 private:
38 // circular buffer. This buffer contains recorders to be merged into global
39 // snaphsot.
40 // Each slot holds a linked list of memory recorders, that contains one
41 // generation of memory data.
42 MemRecorder* _gen[MAX_GENERATIONS];
43 int _head, _tail; // head and tail pointers to above circular buffer
44
45 bool _has_error;
46
47 public:
48 MemTrackWorker();
49 ~MemTrackWorker();
50 _NOINLINE_ void* operator new(size_t size);
51 _NOINLINE_ void* operator new(size_t size, const std::nothrow_t& nothrow_constant);
52
53 void start();
54 void run();
55
56 inline bool has_error() const { return _has_error; }
57
58 // task at synchronization point
59 void at_sync_point(MemRecorder* pending_recorders);
60
61 // for debugging purpose, they are not thread safe.
62 NOT_PRODUCT(static int count_recorder(const MemRecorder* head);)
63 NOT_PRODUCT(int count_pending_recorders() const;)
64
65 NOT_PRODUCT(int _sync_point_count;)
66 NOT_PRODUCT(int _merge_count;)
67 NOT_PRODUCT(int _last_gen_in_use;)
68
69 inline int generations_in_use() const {
70 return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1));
71 }
72 };
73
74 #endif // SHARE_VM_SERVICES_MEM_TRACK_WORKER_HPP