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comparison src/share/vm/memory/classify.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 typedef enum oop_type {
26 unknown_type,
27 instance_type,
28 instanceRef_type,
29 objArray_type,
30 symbol_type,
31 klass_type,
32 instanceKlass_type,
33 method_type,
34 constMethod_type,
35 methodData_type,
36 constantPool_type,
37 constantPoolCache_type,
38 typeArray_type,
39 compiledICHolder_type,
40 number_object_types
41 } object_type;
42
43
44 // Classify objects by type and keep counts.
45 // Print the count and space taken for each type.
46
47
48 class ClassifyObjectClosure : public ObjectClosure {
49 private:
50
51 static const char* object_type_name[number_object_types];
52
53 int total_object_count;
54 size_t total_object_size;
55 int object_count[number_object_types];
56 size_t object_size[number_object_types];
57
58 public:
59 ClassifyObjectClosure() { reset(); }
60 void reset();
61 void do_object(oop obj);
62 static object_type classify_object(oop obj, bool count);
63 size_t print();
64 };
65
66
67 // Count objects using the alloc_count field in the object's klass
68 // object.
69
70 class ClassifyInstanceKlassClosure : public ClassifyObjectClosure {
71 private:
72 int total_instances;
73 public:
74 ClassifyInstanceKlassClosure() { reset(); }
75 void reset();
76 void print();
77 void do_object(oop obj);
78 };
79
80
81 // Clear the alloc_count fields in all classes so that the count can be
82 // restarted.
83
84 class ClearAllocCountClosure : public ObjectClosure {
85 public:
86 void do_object(oop obj) {
87 if (obj->is_klass()) {
88 Klass* k = Klass::cast((klassOop)obj);
89 k->set_alloc_count(0);
90 }
91 }
92 };