1 /*
2 * Copyright (c) 2014, 2018, 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/classLoaderData.inline.hpp"
27 #include "classfile/classLoaderStats.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "utilities/globalDefinitions.hpp"
30
31
32 class ClassStatsClosure : public KlassClosure {
33 public:
34 int _num_classes;
35
36 ClassStatsClosure() :
37 _num_classes(0) {
38 }
39
40 virtual void do_klass(Klass* k) {
41 _num_classes++;
42 }
43 };
44
45
46 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) {
47 oop cl = cld->class_loader();
48 ClassLoaderStats* cls;
49
50 // The hashtable key is the ClassLoader oop since we want to account
51 // for "real" classes and anonymous classes together
52 ClassLoaderStats** cls_ptr = _stats->get(cl);
53 if (cls_ptr == NULL) {
54 cls = new ClassLoaderStats();
55 _stats->put(cl, cls);
56 _total_loaders++;
57 } else {
58 cls = *cls_ptr;
59 }
60
61 if (!cld->is_unsafe_anonymous()) {
62 cls->_cld = cld;
63 }
64
65 cls->_class_loader = cl;
66 if (cl != NULL) {
67 cls->_parent = java_lang_ClassLoader::parent(cl);
68 addEmptyParents(cls->_parent);
69 }
70
71 ClassStatsClosure csc;
72 cld->classes_do(&csc);
73 if(cld->is_unsafe_anonymous()) {
74 cls->_anon_classes_count += csc._num_classes;
75 } else {
76 cls->_classes_count = csc._num_classes;
77 }
78 _total_classes += csc._num_classes;
79
80 ClassLoaderMetaspace* ms = cld->metaspace_or_null();
81 if (ms != NULL) {
82 if(cld->is_unsafe_anonymous()) {
83 cls->_anon_chunk_sz += ms->allocated_chunks_bytes();
84 cls->_anon_block_sz += ms->allocated_blocks_bytes();
85 } else {
86 cls->_chunk_sz = ms->allocated_chunks_bytes();
87 cls->_block_sz = ms->allocated_blocks_bytes();
88 }
89 _total_chunk_sz += ms->allocated_chunks_bytes();
90 _total_block_sz += ms->allocated_blocks_bytes();
91 }
92 }
93
94
95 // Handles the difference in pointer width on 32 and 64 bit platforms
96 #ifdef _LP64
97 #define SPACE "%8s"
98 #else
99 #define SPACE "%s"
100 #endif
101
102
103 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) {
104 Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass());
105 Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass());
106
107 _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
108 p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld),
109 cls->_classes_count,
110 cls->_chunk_sz, cls->_block_sz);
111 if (class_loader_klass != NULL) {
112 _out->print("%s", class_loader_klass->external_name());
113 } else {
114 _out->print("<boot class loader>");
115 }
116 _out->cr();
117 if (cls->_anon_classes_count > 0) {
118 _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes",
119 "", "", "",
120 cls->_anon_classes_count,
121 cls->_anon_chunk_sz, cls->_anon_block_sz);
122 }
123 return true;
124 }
125
126
127 void ClassLoaderStatsClosure::print() {
128 _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", "");
129 _stats->iterate(this);
130 _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders);
131 _out->print(SPACE SPACE SPACE " ", "", "", "");
132 _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
133 _total_classes,
134 _total_chunk_sz,
135 _total_block_sz);
136 _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks");
137 _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)");
138 }
139
140
141 void ClassLoaderStatsClosure::addEmptyParents(oop cl) {
142 while (cl != NULL && java_lang_ClassLoader::loader_data(cl) == NULL) {
143 // This classloader has not loaded any classes
144 ClassLoaderStats** cls_ptr = _stats->get(cl);
145 if (cls_ptr == NULL) {
146 // It does not exist in our table - add it
147 ClassLoaderStats* cls = new ClassLoaderStats();
148 cls->_class_loader = cl;
149 cls->_parent = java_lang_ClassLoader::parent(cl);
150 _stats->put(cl, cls);
151 _total_loaders++;
152 }
153
154 cl = java_lang_ClassLoader::parent(cl);
155 }
156 }
157
158
159 void ClassLoaderStatsVMOperation::doit() {
160 ClassLoaderStatsClosure clsc (_out);
161 ClassLoaderDataGraph::cld_do(&clsc);
162 clsc.print();
163 }
164
165
166 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) {
167 ClassLoaderStatsVMOperation op(output());
168 VMThread::execute(&op);
169 }