1 /* 2 * Copyright (c) 2014, 2015, 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 "oops/oop.inline.hpp" 28 #include "utilities/globalDefinitions.hpp" 29 30 31 class ClassStatsClosure : public KlassClosure { 32 public: 33 int _num_classes; 34 35 ClassStatsClosure() : 36 _num_classes(0) { 37 } 38 39 virtual void do_klass(Klass* k) { 40 _num_classes++; 41 } 42 }; 43 44 45 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) { 46 oop cl = cld->class_loader(); 47 ClassLoaderStats* cls; 48 49 // The hashtable key is the ClassLoader oop since we want to account 50 // for "real" classes and anonymous classes together 51 ClassLoaderStats** cls_ptr = _stats->get(cl); 52 if (cls_ptr == NULL) { 53 cls = new ClassLoaderStats(); 54 _stats->put(cl, cls); 55 _total_loaders++; 56 } else { 57 cls = *cls_ptr; 58 } 59 60 if (!cld->is_anonymous()) { 61 cls->_cld = cld; 62 } 63 64 cls->_class_loader = cl; 65 if (cl != NULL) { 66 cls->_parent = java_lang_ClassLoader::parent(cl); 67 addEmptyParents(cls->_parent); 68 } 69 70 ClassStatsClosure csc; 71 cld->classes_do(&csc); 72 if(cld->is_anonymous()) { 73 cls->_anon_classes_count += csc._num_classes; 74 } else { 75 cls->_classes_count = csc._num_classes; 76 } 77 _total_classes += csc._num_classes; 78 79 ClassLoaderMetaspace* ms = cld->metaspace_or_null(); 80 if (ms != NULL) { 81 if(cld->is_anonymous()) { 82 cls->_anon_chunk_sz += ms->allocated_chunks_bytes(); 83 cls->_anon_block_sz += ms->allocated_blocks_bytes(); 84 } else { 85 cls->_chunk_sz = ms->allocated_chunks_bytes(); 86 cls->_block_sz = ms->allocated_blocks_bytes(); 87 } 88 _total_chunk_sz += ms->allocated_chunks_bytes(); 89 _total_block_sz += ms->allocated_blocks_bytes(); 90 } 91 } 92 93 94 // Handles the difference in pointer width on 32 and 64 bit platforms 95 #ifdef _LP64 96 #define SPACE "%8s" 97 #else 98 #define SPACE "%s" 99 #endif 100 101 102 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) { 103 Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass()); 104 Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass()); 105 106 _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ", 107 p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld), 108 cls->_classes_count, 109 cls->_chunk_sz, cls->_block_sz); 110 if (class_loader_klass != NULL) { 111 _out->print("%s", class_loader_klass->external_name()); 112 } else { 113 _out->print("<boot class loader>"); 114 } 115 _out->cr(); 116 if (cls->_anon_classes_count > 0) { 117 _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes", 118 "", "", "", 119 cls->_anon_classes_count, 120 cls->_anon_chunk_sz, cls->_anon_block_sz); 121 } 122 return true; 123 } 124 125 126 void ClassLoaderStatsClosure::print() { 127 _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", ""); 128 _stats->iterate(this); 129 _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders); 130 _out->print(SPACE SPACE SPACE " ", "", "", ""); 131 _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ", 132 _total_classes, 133 _total_chunk_sz, 134 _total_block_sz); 135 _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks"); 136 _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)"); 137 } 138 139 140 void ClassLoaderStatsClosure::addEmptyParents(oop cl) { 141 while (cl != NULL && java_lang_ClassLoader::loader_data(cl) == NULL) { 142 // This classloader has not loaded any classes 143 ClassLoaderStats** cls_ptr = _stats->get(cl); 144 if (cls_ptr == NULL) { 145 // It does not exist in our table - add it 146 ClassLoaderStats* cls = new ClassLoaderStats(); 147 cls->_class_loader = cl; 148 cls->_parent = java_lang_ClassLoader::parent(cl); 149 _stats->put(cl, cls); 150 _total_loaders++; 151 } 152 153 cl = java_lang_ClassLoader::parent(cl); 154 } 155 } 156 157 158 void ClassLoaderStatsVMOperation::doit() { 159 ClassLoaderStatsClosure clsc (_out); 160 ClassLoaderDataGraph::cld_do(&clsc); 161 clsc.print(); 162 } 163 164 165 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) { 166 ClassLoaderStatsVMOperation op(output()); 167 VMThread::execute(&op); 168 }