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comparison: src/share/vm/classfile/classLoaderStats.cpp

src/share/vm/classfile/classLoaderStats.cpp

changeset 9063
777ace6655eb
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9061:d10254debf7c 9063:777ace6655eb
1 /*
2 * Copyright (c) 2014, 2017, 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 "classfile/classLoaderStats.hpp"
27 #include "utilities/globalDefinitions.hpp"
28
29
30 class ClassStatsClosure : public KlassClosure {
31 public:
32 int _num_classes;
33
34 ClassStatsClosure() :
35 _num_classes(0) {
36 }
37
38 virtual void do_klass(Klass* k) {
39 _num_classes++;
40 }
41 };
42
43
44 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) {
45 oop cl = cld->class_loader();
46 ClassLoaderStats* cls;
47
48 // The hashtable key is the ClassLoader oop since we want to account
49 // for "real" classes and anonymous classes together
50 ClassLoaderStats** cls_ptr = _stats->get(cl);
51 if (cls_ptr == NULL) {
52 cls = new ClassLoaderStats();
53 _stats->put(cl, cls);
54 _total_loaders++;
55 } else {
56 cls = *cls_ptr;
57 }
58
59 if (!cld->is_anonymous()) {
60 cls->_cld = cld;
61 }
62
63 cls->_class_loader = cl;
64 if (cl != NULL) {
65 cls->_parent = java_lang_ClassLoader::parent(cl);
66 addEmptyParents(cls->_parent);
67 }
68
69 ClassStatsClosure csc;
70 cld->classes_do(&csc);
71 if(cld->is_anonymous()) {
72 cls->_anon_classes_count += csc._num_classes;
73 } else {
74 cls->_classes_count = csc._num_classes;
75 }
76 _total_classes += csc._num_classes;
77
78 Metaspace* ms = cld->metaspace_or_null();
79 if (ms != NULL) {
80 if(cld->is_anonymous()) {
81 cls->_anon_chunk_sz += ms->allocated_chunks_bytes();
82 cls->_anon_block_sz += ms->allocated_blocks_bytes();
83 } else {
84 cls->_chunk_sz = ms->allocated_chunks_bytes();
85 cls->_block_sz = ms->allocated_blocks_bytes();
86 }
87 _total_chunk_sz += ms->allocated_chunks_bytes();
88 _total_block_sz += ms->allocated_blocks_bytes();
89 }
90 }
91
92
93 // Handles the difference in pointer width on 32 and 64 bit platforms
94 #ifdef _LP64
95 #define SPACE "%8s"
96 #else
97 #define SPACE "%s"
98 #endif
99
100
101 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) {
102 Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass());
103 Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass());
104
105 _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
106 p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld),
107 cls->_classes_count,
108 cls->_chunk_sz, cls->_block_sz);
109 if (class_loader_klass != NULL) {
110 _out->print("%s", class_loader_klass->external_name());
111 } else {
112 _out->print("<boot class loader>");
113 }
114 _out->cr();
115 if (cls->_anon_classes_count > 0) {
116 _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes",
117 "", "", "",
118 cls->_anon_classes_count,
119 cls->_anon_chunk_sz, cls->_anon_block_sz);
120 }
121 return true;
122 }
123
124
125 void ClassLoaderStatsClosure::print() {
126 _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", "");
127 _stats->iterate(this);
128 _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders);
129 _out->print(SPACE SPACE SPACE " ", "", "", "");
130 _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
131 _total_classes,
132 _total_chunk_sz,
133 _total_block_sz);
134 _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks");
135 _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)");
136 }
137
138
139 void ClassLoaderStatsClosure::addEmptyParents(oop cl) {
140 while (cl != NULL && java_lang_ClassLoader::loader_data(cl) == NULL) {
141 // This classloader has not loaded any classes
142 ClassLoaderStats** cls_ptr = _stats->get(cl);
143 if (cls_ptr == NULL) {
144 // It does not exist in our table - add it
145 ClassLoaderStats* cls = new ClassLoaderStats();
146 cls->_class_loader = cl;
147 cls->_parent = java_lang_ClassLoader::parent(cl);
148 _stats->put(cl, cls);
149 _total_loaders++;
150 }
151
152 cl = java_lang_ClassLoader::parent(cl);
153 }
154 }
155
156
157 void ClassLoaderStatsVMOperation::doit() {
158 ClassLoaderStatsClosure clsc (_out);
159 ClassLoaderDataGraph::cld_do(&clsc);
160 clsc.print();
161 }
162
163
164 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) {
165 ClassLoaderStatsVMOperation op(output());
166 VMThread::execute(&op);
167 }

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