1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/classfile/classLoaderStats.cpp Mon Dec 25 00:08:23 2017 -0500
1.3 @@ -0,0 +1,167 @@
1.4 +/*
1.5 + * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "classfile/classLoaderStats.hpp"
1.30 +#include "utilities/globalDefinitions.hpp"
1.31 +
1.32 +
1.33 +class ClassStatsClosure : public KlassClosure {
1.34 +public:
1.35 + int _num_classes;
1.36 +
1.37 + ClassStatsClosure() :
1.38 + _num_classes(0) {
1.39 + }
1.40 +
1.41 + virtual void do_klass(Klass* k) {
1.42 + _num_classes++;
1.43 + }
1.44 +};
1.45 +
1.46 +
1.47 +void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) {
1.48 + oop cl = cld->class_loader();
1.49 + ClassLoaderStats* cls;
1.50 +
1.51 + // The hashtable key is the ClassLoader oop since we want to account
1.52 + // for "real" classes and anonymous classes together
1.53 + ClassLoaderStats** cls_ptr = _stats->get(cl);
1.54 + if (cls_ptr == NULL) {
1.55 + cls = new ClassLoaderStats();
1.56 + _stats->put(cl, cls);
1.57 + _total_loaders++;
1.58 + } else {
1.59 + cls = *cls_ptr;
1.60 + }
1.61 +
1.62 + if (!cld->is_anonymous()) {
1.63 + cls->_cld = cld;
1.64 + }
1.65 +
1.66 + cls->_class_loader = cl;
1.67 + if (cl != NULL) {
1.68 + cls->_parent = java_lang_ClassLoader::parent(cl);
1.69 + addEmptyParents(cls->_parent);
1.70 + }
1.71 +
1.72 + ClassStatsClosure csc;
1.73 + cld->classes_do(&csc);
1.74 + if(cld->is_anonymous()) {
1.75 + cls->_anon_classes_count += csc._num_classes;
1.76 + } else {
1.77 + cls->_classes_count = csc._num_classes;
1.78 + }
1.79 + _total_classes += csc._num_classes;
1.80 +
1.81 + Metaspace* ms = cld->metaspace_or_null();
1.82 + if (ms != NULL) {
1.83 + if(cld->is_anonymous()) {
1.84 + cls->_anon_chunk_sz += ms->allocated_chunks_bytes();
1.85 + cls->_anon_block_sz += ms->allocated_blocks_bytes();
1.86 + } else {
1.87 + cls->_chunk_sz = ms->allocated_chunks_bytes();
1.88 + cls->_block_sz = ms->allocated_blocks_bytes();
1.89 + }
1.90 + _total_chunk_sz += ms->allocated_chunks_bytes();
1.91 + _total_block_sz += ms->allocated_blocks_bytes();
1.92 + }
1.93 +}
1.94 +
1.95 +
1.96 +// Handles the difference in pointer width on 32 and 64 bit platforms
1.97 +#ifdef _LP64
1.98 + #define SPACE "%8s"
1.99 +#else
1.100 + #define SPACE "%s"
1.101 +#endif
1.102 +
1.103 +
1.104 +bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) {
1.105 + Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass());
1.106 + Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass());
1.107 +
1.108 + _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
1.109 + p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld),
1.110 + cls->_classes_count,
1.111 + cls->_chunk_sz, cls->_block_sz);
1.112 + if (class_loader_klass != NULL) {
1.113 + _out->print("%s", class_loader_klass->external_name());
1.114 + } else {
1.115 + _out->print("<boot class loader>");
1.116 + }
1.117 + _out->cr();
1.118 + if (cls->_anon_classes_count > 0) {
1.119 + _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes",
1.120 + "", "", "",
1.121 + cls->_anon_classes_count,
1.122 + cls->_anon_chunk_sz, cls->_anon_block_sz);
1.123 + }
1.124 + return true;
1.125 +}
1.126 +
1.127 +
1.128 +void ClassLoaderStatsClosure::print() {
1.129 + _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", "");
1.130 + _stats->iterate(this);
1.131 + _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders);
1.132 + _out->print(SPACE SPACE SPACE " ", "", "", "");
1.133 + _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ",
1.134 + _total_classes,
1.135 + _total_chunk_sz,
1.136 + _total_block_sz);
1.137 + _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks");
1.138 + _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)");
1.139 +}
1.140 +
1.141 +
1.142 +void ClassLoaderStatsClosure::addEmptyParents(oop cl) {
1.143 + while (cl != NULL && java_lang_ClassLoader::loader_data(cl) == NULL) {
1.144 + // This classloader has not loaded any classes
1.145 + ClassLoaderStats** cls_ptr = _stats->get(cl);
1.146 + if (cls_ptr == NULL) {
1.147 + // It does not exist in our table - add it
1.148 + ClassLoaderStats* cls = new ClassLoaderStats();
1.149 + cls->_class_loader = cl;
1.150 + cls->_parent = java_lang_ClassLoader::parent(cl);
1.151 + _stats->put(cl, cls);
1.152 + _total_loaders++;
1.153 + }
1.154 +
1.155 + cl = java_lang_ClassLoader::parent(cl);
1.156 + }
1.157 +}
1.158 +
1.159 +
1.160 +void ClassLoaderStatsVMOperation::doit() {
1.161 + ClassLoaderStatsClosure clsc (_out);
1.162 + ClassLoaderDataGraph::cld_do(&clsc);
1.163 + clsc.print();
1.164 +}
1.165 +
1.166 +
1.167 +void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) {
1.168 + ClassLoaderStatsVMOperation op(output());
1.169 + VMThread::execute(&op);
1.170 +}
