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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 4ce7240d622c
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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 # include "incls/_precompiled.incl"
26 # include "incls/_classify.cpp.incl"
27
28
29 const char* ClassifyObjectClosure::object_type_name[number_object_types] = {
30 "unknown",
31 "instance",
32 "instanceRef",
33 "objArray",
34 "symbol",
35 "klass",
36 "instanceKlass",
37 "method",
38 "constMethod",
39 "methodData",
40 "constantPool",
41 "constantPoolCache",
42 "typeArray",
43 "compiledICHolder"
44 };
45
46
47 object_type ClassifyObjectClosure::classify_object(oop obj, bool count) {
48 object_type type = unknown_type;
49
50 Klass* k = obj->blueprint();
51
52 if (k->as_klassOop() == SystemDictionary::object_klass()) {
53 tty->print_cr("Found the class!");
54 }
55
56 if (count) {
57 k->set_alloc_count(k->alloc_count() + 1);
58 }
59
60 if (obj->is_instance()) {
61 if (k->oop_is_instanceRef()) {
62 type = instanceRef_type;
63 } else {
64 type = instance_type;
65 }
66 } else if (obj->is_typeArray()) {
67 type = typeArray_type;
68 } else if (obj->is_objArray()) {
69 type = objArray_type;
70 } else if (obj->is_symbol()) {
71 type = symbol_type;
72 } else if (obj->is_klass()) {
73 Klass* k = ((klassOop)obj)->klass_part();
74 if (k->oop_is_instance()) {
75 type = instanceKlass_type;
76 } else {
77 type = klass_type;
78 }
79 } else if (obj->is_method()) {
80 type = method_type;
81 } else if (obj->is_constMethod()) {
82 type = constMethod_type;
83 } else if (obj->is_methodData()) {
84 ShouldNotReachHere();
85 } else if (obj->is_constantPool()) {
86 type = constantPool_type;
87 } else if (obj->is_constantPoolCache()) {
88 type = constantPoolCache_type;
89 } else if (obj->is_compiledICHolder()) {
90 type = compiledICHolder_type;
91 } else {
92 ShouldNotReachHere();
93 }
94
95 assert(type != unknown_type, "found object of unknown type.");
96 return type;
97 }
98
99
100 void ClassifyObjectClosure::reset() {
101 for (int i = 0; i < number_object_types; ++i) {
102 object_count[i] = 0;
103 object_size[i] = 0;
104 }
105 total_object_count = 0;
106 total_object_size = 0;
107 }
108
109
110 void ClassifyObjectClosure::do_object(oop obj) {
111 int i = classify_object(obj, true);
112 ++object_count[i];
113 ++total_object_count;
114 size_t size = obj->size() * HeapWordSize;
115 object_size[i] += size;
116 total_object_size += size;
117 }
118
119
120 size_t ClassifyObjectClosure::print() {
121 int num_objects = 0;
122 size_t size_objects = 0;
123 for (int i = 0; i < number_object_types; ++i) {
124 if (object_count[i] != 0) {
125 tty->print_cr("%8d %-22s (%8d bytes, %5.2f bytes/object)",
126 object_count[i], object_type_name[i], object_size[i],
127 (float)object_size[i]/(float)object_count[i]);
128 }
129 num_objects += object_count[i];
130 size_objects += object_size[i];
131 }
132 assert(num_objects == total_object_count, "Object count mismatch!");
133 assert(size_objects == total_object_size, "Object size mismatch!");
134
135 tty->print_cr(" Total: %d objects, %d bytes", total_object_count,
136 total_object_size);
137 return total_object_size;
138 }
139
140
141 void ClassifyInstanceKlassClosure::do_object(oop obj) {
142 int type = classify_object(obj, false);
143 if (type == instanceKlass_type || type == klass_type) {
144 Klass* k = ((klassOop)obj)->klass_part();
145 if (k->alloc_count() > 0) {
146 ResourceMark rm;
147 const char *name;
148 if (k->name() == NULL) {
149
150 if (obj == Universe::klassKlassObj()) {
151 name = "_klassKlassObj";
152 } else if (obj == Universe::arrayKlassKlassObj()) {
153 name = "_arrayKlassKlassObj";
154 } else if (obj == Universe::objArrayKlassKlassObj()) {
155 name = "_objArrayKlassKlassObj";
156 } else if (obj == Universe::typeArrayKlassKlassObj()) {
157 name = "_typeArrayKlassKlassObj";
158 } else if (obj == Universe::instanceKlassKlassObj()) {
159 name = "_instanceKlassKlassObj";
160 } else if (obj == Universe::symbolKlassObj()) {
161 name = "_symbolKlassObj";
162 } else if (obj == Universe::methodKlassObj()) {
163 name = "_methodKlassObj";
164 } else if (obj == Universe::constMethodKlassObj()) {
165 name = "_constMethodKlassObj";
166 } else if (obj == Universe::constantPoolKlassObj()) {
167 name = "_constantPoolKlassObj";
168 } else if (obj == Universe::constantPoolCacheKlassObj()) {
169 name = "_constantPoolCacheKlassObj";
170 } else if (obj == Universe::compiledICHolderKlassObj()) {
171 name = "_compiledICHolderKlassObj";
172 } else if (obj == Universe::systemObjArrayKlassObj()) {
173 name = "_systemObjArrayKlassObj";
174 } else {
175 name = "[unnamed]";
176 }
177 } else {
178 name = k->external_name();
179 }
180 tty->print_cr("% 8d instances of %s", k->alloc_count(), name);
181 }
182 total_instances += k->alloc_count();
183 }
184 }
185
186
187 void ClassifyInstanceKlassClosure::print() {
188 tty->print_cr(" Total instances: %d.", total_instances);
189 }
190
191
192 void ClassifyInstanceKlassClosure::reset() {
193 total_instances = 0;
194 }