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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "classfile/classLoaderStats.hpp" |
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27 #include "utilities/globalDefinitions.hpp" |
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28 |
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29 |
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30 class ClassStatsClosure : public KlassClosure { |
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31 public: |
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32 int _num_classes; |
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33 |
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34 ClassStatsClosure() : |
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35 _num_classes(0) { |
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36 } |
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37 |
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38 virtual void do_klass(Klass* k) { |
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39 _num_classes++; |
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40 } |
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41 }; |
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42 |
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43 |
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44 void ClassLoaderStatsClosure::do_cld(ClassLoaderData* cld) { |
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45 oop cl = cld->class_loader(); |
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46 ClassLoaderStats* cls; |
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47 |
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48 // The hashtable key is the ClassLoader oop since we want to account |
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49 // for "real" classes and anonymous classes together |
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50 ClassLoaderStats** cls_ptr = _stats->get(cl); |
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51 if (cls_ptr == NULL) { |
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52 cls = new ClassLoaderStats(); |
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53 _stats->put(cl, cls); |
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54 _total_loaders++; |
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55 } else { |
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56 cls = *cls_ptr; |
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57 } |
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58 |
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59 if (!cld->is_anonymous()) { |
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60 cls->_cld = cld; |
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61 } |
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62 |
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63 cls->_class_loader = cl; |
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64 if (cl != NULL) { |
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65 cls->_parent = java_lang_ClassLoader::parent(cl); |
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66 addEmptyParents(cls->_parent); |
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67 } |
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68 |
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69 ClassStatsClosure csc; |
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70 cld->classes_do(&csc); |
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71 if(cld->is_anonymous()) { |
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72 cls->_anon_classes_count += csc._num_classes; |
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73 } else { |
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74 cls->_classes_count = csc._num_classes; |
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75 } |
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76 _total_classes += csc._num_classes; |
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77 |
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78 Metaspace* ms = cld->metaspace_or_null(); |
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79 if (ms != NULL) { |
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80 if(cld->is_anonymous()) { |
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81 cls->_anon_chunk_sz += ms->allocated_chunks_bytes(); |
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82 cls->_anon_block_sz += ms->allocated_blocks_bytes(); |
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83 } else { |
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84 cls->_chunk_sz = ms->allocated_chunks_bytes(); |
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85 cls->_block_sz = ms->allocated_blocks_bytes(); |
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86 } |
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87 _total_chunk_sz += ms->allocated_chunks_bytes(); |
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88 _total_block_sz += ms->allocated_blocks_bytes(); |
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89 } |
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90 } |
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91 |
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92 |
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93 // Handles the difference in pointer width on 32 and 64 bit platforms |
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94 #ifdef _LP64 |
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95 #define SPACE "%8s" |
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96 #else |
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97 #define SPACE "%s" |
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98 #endif |
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99 |
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100 |
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101 bool ClassLoaderStatsClosure::do_entry(oop const& key, ClassLoaderStats* const& cls) { |
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102 Klass* class_loader_klass = (cls->_class_loader == NULL ? NULL : cls->_class_loader->klass()); |
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103 Klass* parent_klass = (cls->_parent == NULL ? NULL : cls->_parent->klass()); |
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104 |
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105 _out->print(INTPTR_FORMAT " " INTPTR_FORMAT " " INTPTR_FORMAT " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ", |
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106 p2i(class_loader_klass), p2i(parent_klass), p2i(cls->_cld), |
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107 cls->_classes_count, |
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108 cls->_chunk_sz, cls->_block_sz); |
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109 if (class_loader_klass != NULL) { |
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110 _out->print("%s", class_loader_klass->external_name()); |
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111 } else { |
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112 _out->print("<boot class loader>"); |
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113 } |
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114 _out->cr(); |
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115 if (cls->_anon_classes_count > 0) { |
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116 _out->print_cr(SPACE SPACE SPACE " " UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " + unsafe anonymous classes", |
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117 "", "", "", |
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118 cls->_anon_classes_count, |
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119 cls->_anon_chunk_sz, cls->_anon_block_sz); |
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120 } |
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121 return true; |
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122 } |
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123 |
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124 |
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125 void ClassLoaderStatsClosure::print() { |
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126 _out->print_cr("ClassLoader" SPACE " Parent" SPACE " CLD*" SPACE " Classes ChunkSz BlockSz Type", "", "", ""); |
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127 _stats->iterate(this); |
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128 _out->print("Total = " UINTX_FORMAT_W(-6), _total_loaders); |
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129 _out->print(SPACE SPACE SPACE " ", "", "", ""); |
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130 _out->print_cr(UINTX_FORMAT_W(6) " " SIZE_FORMAT_W(8) " " SIZE_FORMAT_W(8) " ", |
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131 _total_classes, |
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132 _total_chunk_sz, |
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133 _total_block_sz); |
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134 _out->print_cr("ChunkSz: Total size of all allocated metaspace chunks"); |
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135 _out->print_cr("BlockSz: Total size of all allocated metaspace blocks (each chunk has several blocks)"); |
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136 } |
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137 |
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138 |
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139 void ClassLoaderStatsClosure::addEmptyParents(oop cl) { |
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140 while (cl != NULL && java_lang_ClassLoader::loader_data(cl) == NULL) { |
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141 // This classloader has not loaded any classes |
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142 ClassLoaderStats** cls_ptr = _stats->get(cl); |
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143 if (cls_ptr == NULL) { |
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144 // It does not exist in our table - add it |
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145 ClassLoaderStats* cls = new ClassLoaderStats(); |
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146 cls->_class_loader = cl; |
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147 cls->_parent = java_lang_ClassLoader::parent(cl); |
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148 _stats->put(cl, cls); |
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149 _total_loaders++; |
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150 } |
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151 |
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152 cl = java_lang_ClassLoader::parent(cl); |
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153 } |
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154 } |
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155 |
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156 |
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157 void ClassLoaderStatsVMOperation::doit() { |
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158 ClassLoaderStatsClosure clsc (_out); |
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159 ClassLoaderDataGraph::cld_do(&clsc); |
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160 clsc.print(); |
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161 } |
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162 |
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163 |
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164 void ClassLoaderStatsDCmd::execute(DCmdSource source, TRAPS) { |
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165 ClassLoaderStatsVMOperation op(output()); |
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166 VMThread::execute(&op); |
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167 } |