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comparison src/share/vm/services/memPtr.cpp @ 6197:d2a62e0f25eb

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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
date Thu, 28 Jun 2012 17:03:16 -0400
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children e5bf1c79ed5b
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6174:74533f63b116 6197:d2a62e0f25eb
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 }