Mercurial > hg > graal-compiler
comparison src/share/vm/services/memPtr.cpp @ 6197:d2a62e0f25eb
6995781: Native Memory Tracking (Phase 1)
7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain
author | zgu |
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date | Thu, 28 Jun 2012 17:03:16 -0400 |
parents | |
children | e5bf1c79ed5b |
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6174:74533f63b116 | 6197:d2a62e0f25eb |
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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 #include "precompiled.hpp" | |
26 #include "services/memPtr.hpp" | |
27 #include "services/memTracker.hpp" | |
28 | |
29 volatile jint SequenceGenerator::_seq_number = 1; | |
30 DEBUG_ONLY(jint SequenceGenerator::_max_seq_number = 1;) | |
31 DEBUG_ONLY(volatile unsigned long SequenceGenerator::_generation = 0;) | |
32 | |
33 jint SequenceGenerator::next() { | |
34 jint seq = Atomic::add(1, &_seq_number); | |
35 if (seq < 0) { | |
36 MemTracker::shutdown(MemTracker::NMT_sequence_overflow); | |
37 } | |
38 assert(seq > 0, "counter overflow"); | |
39 DEBUG_ONLY(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;) | |
40 return seq; | |
41 } | |
42 | |
43 | |
44 | |
45 bool VMMemRegion::contains(const VMMemRegion* mr) const { | |
46 assert(base() != 0, "no base address"); | |
47 assert(size() != 0 || committed_size() != 0, | |
48 "no range"); | |
49 address base_addr = base(); | |
50 address end_addr = base_addr + | |
51 (is_reserve_record()? reserved_size(): committed_size()); | |
52 if (mr->is_reserve_record()) { | |
53 if (mr->base() == base_addr && mr->size() == size()) { | |
54 // the same range | |
55 return true; | |
56 } | |
57 return false; | |
58 } else if (mr->is_commit_record() || mr->is_uncommit_record()) { | |
59 assert(mr->base() != 0 && mr->committed_size() > 0, | |
60 "bad record"); | |
61 return (mr->base() >= base_addr && | |
62 (mr->base() + mr->committed_size()) <= end_addr); | |
63 } else if (mr->is_type_tagging_record()) { | |
64 assert(mr->base() != 0, "no base"); | |
65 return mr->base() == base_addr; | |
66 } else if (mr->is_release_record()) { | |
67 assert(mr->base() != 0 && mr->size() > 0, | |
68 "bad record"); | |
69 return (mr->base() == base_addr && mr->size() == size()); | |
70 } else { | |
71 assert(false, "what happened?"); | |
72 return false; | |
73 } | |
74 } |