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 37 ClassStatsClosure() : 38 _num_classes(0) { 39 } 40 41 virtual void do_klass(Klass* k) { 42 _num_classes++; 43 } 44 }; 45 46 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 102 103 104 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 } 126 127 128 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 } 140 141 142 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 } 158 159 160 void ClassLoaderStatsVMOperation::doit() { 161 ClassLoaderStatsClosure clsc (_out); 162 ClassLoaderDataGraph::loaded_cld_do(&clsc); 163 clsc.print(); 164 } 165 166 167 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) { 168 ClassLoaderStatsVMOperation op(output()); 169 VMThread::execute(&op); 170 }