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/classLoaderDataGraph.hpp"
28 #include "classfile/classLoaderStats.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "utilities/globalDefinitions.hpp"
31
32
33 class ClassStatsClosure : public KlassClosure {
34 public:
35 int _num_classes;
36
ClassStatsClosure()37 ClassStatsClosure() :
38 _num_classes(0) {
39 }
40
do_klass(Klass * k)41 virtual void do_klass(Klass* k) {
42 _num_classes++;
43 }
44 };
45
46
do_cld(ClassLoaderData * cld)47 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) {
48 oop cl = cld->class_loader();
49 ClassLoaderStats* cls;
50
51 // The hashtable key is the ClassLoader oop since we want to account
52 // for "real" classes and anonymous classes together
53 ClassLoaderStats** cls_ptr = _stats->get(cl);
54 if (cls_ptr == NULL) {
55 cls = new ClassLoaderStats();
56 _stats->put(cl, cls);
57 _total_loaders++;
58 } else {
59 cls = *cls_ptr;
60 }
61
62 if (!cld->is_unsafe_anonymous()) {
63 cls->_cld = cld;
64 }
65
66 cls->_class_loader = cl;
67 if (cl != NULL) {
68 cls->_parent = java_lang_ClassLoader::parent(cl);
69 addEmptyParents(cls->_parent);
70 }
71
72 ClassStatsClosure csc;
73 cld->classes_do(&csc);
74 if(cld->is_unsafe_anonymous()) {
75 cls->_anon_classes_count += csc._num_classes;
76 } else {
77 cls->_classes_count = csc._num_classes;
78 }
79 _total_classes += csc._num_classes;
80
81 ClassLoaderMetaspace* ms = cld->metaspace_or_null();
82 if (ms != NULL) {
83 if(cld->is_unsafe_anonymous()) {
84 cls->_anon_chunk_sz += ms->allocated_chunks_bytes();
85 cls->_anon_block_sz += ms->allocated_blocks_bytes();
86 } else {
87 cls->_chunk_sz = ms->allocated_chunks_bytes();
88 cls->_block_sz = ms->allocated_blocks_bytes();
89 }
90 _total_chunk_sz += ms->allocated_chunks_bytes();
91 _total_block_sz += ms->allocated_blocks_bytes();
92 }
93 }
94
95
96 // Handles the difference in pointer width on 32 and 64 bit platforms
97 #ifdef _LP64
98 #define SPACE "%8s"
99 #else
100 #define SPACE "%s"
101 #endif
102
103
do_entry(oop const & key,ClassLoaderStats * const & cls)104 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) {
105 Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass());
106 Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass());
107
108 _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
109 p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld),
110 cls->_classes_count,
111 cls->_chunk_sz, cls->_block_sz);
112 if (class_loader_klass != NULL) {
113 _out->print("%s", class_loader_klass->external_name());
114 } else {
115 _out->print("<boot class loader>");
116 }
117 _out->cr();
118 if (cls->_anon_classes_count > 0) {
119 _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes",
120 "", "", "",
121 cls->_anon_classes_count,
122 cls->_anon_chunk_sz, cls->_anon_block_sz);
123 }
124 return true;
125 }
126
127
print()128 void ClassLoaderStatsClosure::print() {
129 _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", "");
130 _stats->iterate(this);
131 _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders);
132 _out->print(SPACE SPACE SPACE " ", "", "", "");
133 _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
134 _total_classes,
135 _total_chunk_sz,
136 _total_block_sz);
137 _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks");
138 _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)");
139 }
140
141
addEmptyParents(oop cl)142 void ClassLoaderStatsClosure::addEmptyParents(oop cl) {
143 while (cl != NULL && java_lang_ClassLoader::loader_data_acquire(cl) == NULL) {
144 // This classloader has not loaded any classes
145 ClassLoaderStats** cls_ptr = _stats->get(cl);
146 if (cls_ptr == NULL) {
147 // It does not exist in our table - add it
148 ClassLoaderStats* cls = new ClassLoaderStats();
149 cls->_class_loader = cl;
150 cls->_parent = java_lang_ClassLoader::parent(cl);
151 _stats->put(cl, cls);
152 _total_loaders++;
153 }
154
155 cl = java_lang_ClassLoader::parent(cl);
156 }
157 }
158
159
doit()160 void ClassLoaderStatsVMOperation::doit() {
161 ClassLoaderStatsClosure clsc (_out);
162 ClassLoaderDataGraph::loaded_cld_do(&clsc);
163 clsc.print();
164 }
165
166
execute(DCmdSource source,TRAPS)167 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) {
168 ClassLoaderStatsVMOperation op(output());
169 VMThread::execute(&op);
170 }
171