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/resourceArea.hpp" 30 #include "runtime/safepoint.hpp" 31 #include "utilities/globalDefinitions.hpp" 32 #include "utilities/ostream.hpp" 33 34 35 namespace metaspace { 36 37 PrintCLDMetaspaceInfoClosure::PrintCLDMetaspaceInfoClosure(outputStream* out, size_t scale, bool do_print, 38 bool do_print_classes, bool break_down_by_chunktype) 39 : _out(out), _scale(scale), _do_print(do_print), _do_print_classes(do_print_classes) 40 , _break_down_by_chunktype(break_down_by_chunktype) 41 , _num_loaders(0), _num_loaders_unloading(0), _num_loaders_without_metaspace(0) 42 { 43 memset(_num_loaders_by_spacetype, 0, sizeof(_num_loaders_by_spacetype)); 44 } 45 46 static const char* classes_plural(uintx num) { 47 return num == 1 ? "" : "es"; 48 } 49 50 void PrintCLDMetaspaceInfoClosure::do_cld(ClassLoaderData* cld) { 51 52 assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint"); 53 54 if (cld->is_unloading()) { 55 _num_loaders_unloading ++; 56 return; 57 } 58 59 ClassLoaderMetaspace* msp = cld->metaspace_or_null(); 60 if (msp == NULL) { 61 _num_loaders_without_metaspace ++; 62 return; 63 } 64 65 // Collect statistics for this class loader metaspace 66 ClassLoaderMetaspaceStatistics this_cld_stat; 67 msp->add_to_statistics(&this_cld_stat); 68 69 // And add it to the running totals 70 _stats_total.add(this_cld_stat); 71 _num_loaders ++; 72 _stats_by_spacetype[msp->space_type()].add(this_cld_stat); 73 _num_loaders_by_spacetype[msp->space_type()] ++; 74 75 // Optionally, print. 76 if (_do_print) { 77 78 _out->print(UINTX_FORMAT_W(4) ": ", _num_loaders); 79 80 // Print "CLD for [<loader name>,] instance of <loader class name>" 81 // or "CLD for <anonymous class>, loaded by [<loader name>,] instance of <loader class name>" 82 83 ResourceMark rm; 84 const char* name = NULL; 85 const char* class_name = NULL; 86 87 // Note: this should also work if unloading: 88 Klass* k = cld->class_loader_klass(); 89 if (k != NULL) { 90 class_name = k->external_name(); 91 Symbol* s = cld->name(); 92 if (s != NULL) { 93 name = s->as_C_string(); 94 } 95 } else { 96 name = "<bootstrap>"; 97 } 98 99 // Print 100 _out->print("CLD " PTR_FORMAT, p2i(cld)); 101 if (cld->is_unloading()) { 102 _out->print(" (unloading)"); 103 } 104 _out->print(":"); 105 if (cld->is_anonymous()) { 106 _out->print(" <anonymous class>, loaded by"); 107 } 108 if (name != NULL) { 109 _out->print(" \"%s\"", name); 110 } 111 if (class_name != NULL) { 112 _out->print(" instance of %s", class_name); 113 } 114 115 if (_do_print_classes) { 116 streamIndentor sti(_out, 6); 117 _out->cr_indent(); 118 _out->print("Loaded classes: "); 119 PrintMetaspaceInfoKlassClosure pkic(_out, true); 120 cld->classes_do(&pkic); 121 _out->cr_indent(); 122 _out->print("-total-: "); 123 _out->print(UINTX_FORMAT " class%s", pkic._num_classes, classes_plural(pkic._num_classes)); 124 if (pkic._num_instance_classes > 0 || pkic._num_array_classes > 0) { 125 _out->print(" ("); 126 if (pkic._num_instance_classes > 0) { 127 _out->print(UINTX_FORMAT " instance class%s", pkic._num_instance_classes, 128 classes_plural(pkic._num_instance_classes)); 129 } 130 if (pkic._num_array_classes > 0) { 131 if (pkic._num_instance_classes > 0) { 132 _out->print(", "); 133 } 134 _out->print(UINTX_FORMAT " array class%s", pkic._num_array_classes, 135 classes_plural(pkic._num_array_classes)); 136 } 137 _out->print(")."); 138 } 139 } 140 141 _out->cr(); 142 143 144 _out->cr(); 145 146 // Print statistics 147 this_cld_stat.print_on(_out, _scale, _break_down_by_chunktype); 148 _out->cr(); 149 150 } 151 152 } 153 154 } // namespace metaspace 155