1 /* 2 * Copyright (c) 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 #include "precompiled.hpp" 25 #include "classfile/classLoaderData.inline.hpp" 26 #include "classfile/javaClasses.hpp" 27 #include "memory/metaspace/printCLDMetaspaceInfoClosure.hpp" 28 #include "memory/metaspace/printMetaspaceInfoKlassClosure.hpp" 29 #include "memory/metaspaceShared.hpp" 30 #include "memory/resourceArea.hpp" 31 #include "runtime/safepoint.hpp" 32 #include "utilities/globalDefinitions.hpp" 33 #include "utilities/ostream.hpp" 34 35 36 namespace metaspace { 37 38 PrintCLDMetaspaceInfoClosure::PrintCLDMetaspaceInfoClosure(outputStream* out, size_t scale, bool do_print, 39 bool do_print_classes, bool break_down_by_chunktype) 40 : _out(out), _scale(scale), _do_print(do_print), _do_print_classes(do_print_classes) 41 , _break_down_by_chunktype(break_down_by_chunktype) 42 , _num_loaders(0), _num_loaders_without_metaspace(0), _num_loaders_unloading(0) 43 , _num_classes(0), _num_classes_shared(0) 44 { 45 memset(_num_loaders_by_spacetype, 0, sizeof(_num_loaders_by_spacetype)); 46 memset(_num_classes_by_spacetype, 0, sizeof(_num_classes_by_spacetype)); 47 memset(_num_classes_shared_by_spacetype, 0, sizeof(_num_classes_shared_by_spacetype)); 48 } 49 50 // A closure just to count classes 51 class CountKlassClosure : public KlassClosure { 52 public: 53 54 uintx _num_classes; 55 uintx _num_classes_shared; 56 57 CountKlassClosure() : _num_classes(0), _num_classes_shared(0) {} 58 void do_klass(Klass* k) { 59 _num_classes ++; 60 if (k->is_shared()) { 61 _num_classes_shared ++; 62 } 63 } 64 65 }; // end: PrintKlassInfoClosure 66 67 void PrintCLDMetaspaceInfoClosure::do_cld(ClassLoaderData* cld) { 68 69 assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint"); 70 71 if (cld->is_unloading()) { 72 _num_loaders_unloading ++; 73 return; 74 } 75 76 ClassLoaderMetaspace* msp = cld->metaspace_or_null(); 77 if (msp == NULL) { 78 _num_loaders_without_metaspace ++; 79 return; 80 } 81 82 // Collect statistics for this class loader metaspace 83 ClassLoaderMetaspaceStatistics this_cld_stat; 84 msp->add_to_statistics(&this_cld_stat); 85 86 // And add it to the running totals 87 _stats_total.add(this_cld_stat); 88 _num_loaders ++; 89 _stats_by_spacetype[msp->space_type()].add(this_cld_stat); 90 _num_loaders_by_spacetype[msp->space_type()] ++; 91 92 // Count classes loaded by this CLD. 93 CountKlassClosure ckc; 94 cld->classes_do(&ckc); 95 // accumulate. 96 _num_classes += ckc._num_classes; 97 _num_classes_by_spacetype[msp->space_type()] += ckc._num_classes; 98 _num_classes_shared += ckc._num_classes_shared; 99 _num_classes_shared_by_spacetype[msp->space_type()] += ckc._num_classes_shared; 100 101 // Optionally, print 102 if (_do_print) { 103 104 _out->print(UINTX_FORMAT_W(4) ": ", _num_loaders); 105 106 // Print "CLD for [<loader name>,] instance of <loader class name>" 107 // or "CLD for <anonymous class>, loaded by [<loader name>,] instance of <loader class name>" 108 109 ResourceMark rm; 110 const char* name = NULL; 111 const char* class_name = NULL; 112 113 // Note: this should also work if unloading: 114 Klass* k = cld->class_loader_klass(); 115 if (k != NULL) { 116 class_name = k->external_name(); 117 Symbol* s = cld->name(); 118 if (s != NULL) { 119 name = s->as_C_string(); 120 } 121 } else { 122 name = "<bootstrap>"; 123 } 124 125 // Print 126 _out->print("CLD " PTR_FORMAT, p2i(cld)); 127 if (cld->is_unloading()) { 128 _out->print(" (unloading)"); 129 } 130 _out->print(":"); 131 if (cld->is_unsafe_anonymous()) { 132 _out->print(" <anonymous class>, loaded by"); 133 } 134 if (name != NULL) { 135 _out->print(" \"%s\"", name); 136 } 137 if (class_name != NULL) { 138 _out->print(" instance of %s", class_name); 139 } 140 141 if (_do_print_classes) { 142 // Print a detailed description of all loaded classes. 143 streamIndentor sti(_out, 6); 144 _out->cr_indent(); 145 _out->print("Loaded classes"); 146 if (ckc._num_classes_shared > 0) { 147 _out->print("('s' = shared)"); 148 } 149 _out->print(":"); 150 PrintMetaspaceInfoKlassClosure pkic(_out, true); 151 cld->classes_do(&pkic); 152 _out->cr_indent(); 153 _out->print("-total-: "); 154 print_number_of_classes(_out, ckc._num_classes, ckc._num_classes_shared); 155 } else { 156 // Just print a summary about how many classes have been loaded. 157 _out->print(", "); 158 print_number_of_classes(_out, ckc._num_classes, ckc._num_classes_shared); 159 } 160 161 // Print statistics 162 this_cld_stat.print_on(_out, _scale, _break_down_by_chunktype); 163 _out->cr(); 164 165 } 166 167 } 168 169 } // namespace metaspace 170