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 "memory/metaspace/classLoaderMetaspace.hpp" 27 #include "classfile/classLoaderData.inline.hpp" 28 #include "classfile/classLoaderDataGraph.hpp" 29 #include "classfile/classLoaderStats.hpp" 30 #include "oops/oop.inline.hpp" 31 #include "utilities/globalDefinitions.hpp" 32 33 34 class ClassStatsClosure : public KlassClosure { 35 public: 36 int _num_classes; 37 38 ClassStatsClosure() : 39 _num_classes(0) { 40 } 41 42 virtual void do_klass(Klass* k) { 43 _num_classes++; 44 } 45 }; 46 47 48 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) { 49 oop cl = cld->class_loader(); 50 ClassLoaderStats* cls; 51 52 // The hashtable key is the ClassLoader oop since we want to account 53 // for "real" classes and anonymous classes together 54 ClassLoaderStats** cls_ptr = _stats->get(cl); 55 if (cls_ptr == NULL) { 56 cls = new ClassLoaderStats(); 57 _stats->put(cl, cls); 58 _total_loaders++; 59 } else { 60 cls = *cls_ptr; 61 } 62 63 if (!cld->is_unsafe_anonymous()) { 64 cls->_cld = cld; 65 } 66 67 cls->_class_loader = cl; 68 if (cl != NULL) { 69 cls->_parent = java_lang_ClassLoader::parent(cl); 70 addEmptyParents(cls->_parent); 71 } 72 73 ClassStatsClosure csc; 74 cld->classes_do(&csc); 75 if(cld->is_unsafe_anonymous()) { 76 cls->_anon_classes_count += csc._num_classes; 77 } else { 78 cls->_classes_count = csc._num_classes; 79 } 80 _total_classes += csc._num_classes; 81 82 metaspace::ClassLoaderMetaspace* ms = cld->metaspace_or_null(); 83 if (ms != NULL) { 84 if(cld->is_unsafe_anonymous()) { 85 cls->_anon_chunk_sz += ms->allocated_chunks_bytes(); 86 cls->_anon_block_sz += ms->allocated_blocks_bytes(); 87 } else { 88 cls->_chunk_sz = ms->allocated_chunks_bytes(); 89 cls->_block_sz = ms->allocated_blocks_bytes(); 90 } 91 _total_chunk_sz += ms->allocated_chunks_bytes(); 92 _total_block_sz += ms->allocated_blocks_bytes(); 93 } 94 } 95 96 97 // Handles the difference in pointer width on 32 and 64 bit platforms 98 #ifdef _LP64 99 #define SPACE "%8s" 100 #else 101 #define SPACE "%s" 102 #endif 103 104 105 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) { 106 Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass()); 107 Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass()); 108 109 _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ", 110 p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld), 111 cls->_classes_count, 112 cls->_chunk_sz, cls->_block_sz); 113 if (class_loader_klass != NULL) { 114 _out->print("%s", class_loader_klass->external_name()); 115 } else { 116 _out->print("<boot class loader>"); 117 } 118 _out->cr(); 119 if (cls->_anon_classes_count > 0) { 120 _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes", 121 "", "", "", 122 cls->_anon_classes_count, 123 cls->_anon_chunk_sz, cls->_anon_block_sz); 124 } 125 return true; 126 } 127 128 129 void ClassLoaderStatsClosure::print() { 130 _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", ""); 131 _stats->iterate(this); 132 _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders); 133 _out->print(SPACE SPACE SPACE " ", "", "", ""); 134 _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ", 135 _total_classes, 136 _total_chunk_sz, 137 _total_block_sz); 138 _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks"); 139 _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)"); 140 } 141 142 143 void ClassLoaderStatsClosure::addEmptyParents(oop cl) { 144 while (cl != NULL && java_lang_ClassLoader::loader_data_acquire(cl) == NULL) { 145 // This classloader has not loaded any classes 146 ClassLoaderStats** cls_ptr = _stats->get(cl); 147 if (cls_ptr == NULL) { 148 // It does not exist in our table - add it 149 ClassLoaderStats* cls = new ClassLoaderStats(); 150 cls->_class_loader = cl; 151 cls->_parent = java_lang_ClassLoader::parent(cl); 152 _stats->put(cl, cls); 153 _total_loaders++; 154 } 155 156 cl = java_lang_ClassLoader::parent(cl); 157 } 158 } 159 160 161 void ClassLoaderStatsVMOperation::doit() { 162 ClassLoaderStatsClosure clsc (_out); 163 ClassLoaderDataGraph::loaded_cld_do(&clsc); 164 clsc.print(); 165 } 166 167 168 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) { 169 ClassLoaderStatsVMOperation op(output()); 170 VMThread::execute(&op); 171 }