Mercurial > hg > truffle
annotate src/share/vm/memory/classify.hpp @ 4712:e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
Summary: Replaces calls to os::javaTimeMillis(), which does not (and cannot) guarantee monotonicity, in GC code to an equivalent expression that uses os::javaTimeNanos(). os::javaTimeNanos is guaranteed monotonically non-decreasing if the underlying platform provides a monotonic time source. Changes in OS files are to make use of the newly defined constants in globalDefinitions.hpp.
Reviewed-by: dholmes, ysr
author | johnc |
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date | Mon, 19 Dec 2011 10:02:05 -0800 |
parents | f95d63e2154a |
children |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_MEMORY_CLASSIFY_HPP |
26 #define SHARE_VM_MEMORY_CLASSIFY_HPP | |
27 | |
28 #include "oops/oop.inline.hpp" | |
29 | |
0 | 30 typedef enum oop_type { |
31 unknown_type, | |
32 instance_type, | |
33 instanceRef_type, | |
34 objArray_type, | |
35 symbol_type, | |
36 klass_type, | |
37 instanceKlass_type, | |
38 method_type, | |
39 constMethod_type, | |
40 methodData_type, | |
41 constantPool_type, | |
42 constantPoolCache_type, | |
43 typeArray_type, | |
44 compiledICHolder_type, | |
45 number_object_types | |
46 } object_type; | |
47 | |
48 | |
49 // Classify objects by type and keep counts. | |
50 // Print the count and space taken for each type. | |
51 | |
52 | |
53 class ClassifyObjectClosure : public ObjectClosure { | |
54 private: | |
55 | |
56 static const char* object_type_name[number_object_types]; | |
57 | |
58 int total_object_count; | |
59 size_t total_object_size; | |
60 int object_count[number_object_types]; | |
61 size_t object_size[number_object_types]; | |
62 | |
63 public: | |
64 ClassifyObjectClosure() { reset(); } | |
65 void reset(); | |
66 void do_object(oop obj); | |
67 static object_type classify_object(oop obj, bool count); | |
68 size_t print(); | |
69 }; | |
70 | |
71 | |
72 // Count objects using the alloc_count field in the object's klass | |
73 // object. | |
74 | |
75 class ClassifyInstanceKlassClosure : public ClassifyObjectClosure { | |
76 private: | |
77 int total_instances; | |
78 public: | |
79 ClassifyInstanceKlassClosure() { reset(); } | |
80 void reset(); | |
81 void print(); | |
82 void do_object(oop obj); | |
83 }; | |
84 | |
85 | |
86 // Clear the alloc_count fields in all classes so that the count can be | |
87 // restarted. | |
88 | |
89 class ClearAllocCountClosure : public ObjectClosure { | |
90 public: | |
91 void do_object(oop obj) { | |
92 if (obj->is_klass()) { | |
93 Klass* k = Klass::cast((klassOop)obj); | |
94 k->set_alloc_count(0); | |
95 } | |
96 } | |
97 }; | |
1972 | 98 |
99 #endif // SHARE_VM_MEMORY_CLASSIFY_HPP |