Mercurial > hg > truffle
annotate src/share/vm/services/classLoadingService.cpp @ 14518:d8041d695d19
Merged with jdk9/dev/hotspot changeset 3812c088b945
| author | twisti |
|---|---|
| date | Tue, 11 Mar 2014 18:45:59 -0700 |
| parents | e6195383bcaf |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "memory/allocation.hpp" | |
| 28 #include "memory/universe.hpp" | |
| 29 #include "oops/oop.inline.hpp" | |
| 30 #include "runtime/mutexLocker.hpp" | |
| 31 #include "services/classLoadingService.hpp" | |
| 32 #include "services/memoryService.hpp" | |
| 33 #include "utilities/dtrace.hpp" | |
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34 #include "utilities/macros.hpp" |
| 0 | 35 |
| 36 #ifdef DTRACE_ENABLED | |
| 37 | |
| 38 // Only bother with this argument setup if dtrace is available | |
| 39 | |
| 4006 | 40 #define HOTSPOT_CLASS_unloaded HOTSPOT_CLASS_UNLOADED |
| 41 #define HOTSPOT_CLASS_loaded HOTSPOT_CLASS_LOADED | |
| 42 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) \ | |
| 43 { \ | |
| 44 char* data = NULL; \ | |
| 45 int len = 0; \ | |
| 46 Symbol* name = (clss)->name(); \ | |
| 47 if (name != NULL) { \ | |
| 48 data = (char*)name->bytes(); \ | |
| 49 len = name->utf8_length(); \ | |
| 50 } \ | |
| 51 HOTSPOT_CLASS_##type( /* type = unloaded, loaded */ \ | |
| 52 data, len, (clss)->class_loader(), (shared)); \ | |
| 53 } | |
| 54 | |
| 0 | 55 #else // ndef DTRACE_ENABLED |
| 56 | |
| 57 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) | |
| 58 | |
| 59 #endif | |
| 60 | |
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61 #if INCLUDE_MANAGEMENT |
| 0 | 62 // counters for classes loaded from class files |
| 63 PerfCounter* ClassLoadingService::_classes_loaded_count = NULL; | |
| 64 PerfCounter* ClassLoadingService::_classes_unloaded_count = NULL; | |
| 65 PerfCounter* ClassLoadingService::_classbytes_loaded = NULL; | |
| 66 PerfCounter* ClassLoadingService::_classbytes_unloaded = NULL; | |
| 67 | |
| 68 // counters for classes loaded from shared archive | |
| 69 PerfCounter* ClassLoadingService::_shared_classes_loaded_count = NULL; | |
| 70 PerfCounter* ClassLoadingService::_shared_classes_unloaded_count = NULL; | |
| 71 PerfCounter* ClassLoadingService::_shared_classbytes_loaded = NULL; | |
| 72 PerfCounter* ClassLoadingService::_shared_classbytes_unloaded = NULL; | |
| 73 PerfVariable* ClassLoadingService::_class_methods_size = NULL; | |
| 74 | |
| 75 void ClassLoadingService::init() { | |
| 76 EXCEPTION_MARK; | |
| 77 | |
| 78 // These counters are for java.lang.management API support. | |
| 79 // They are created even if -XX:-UsePerfData is set and in | |
| 80 // that case, they will be allocated on C heap. | |
| 81 _classes_loaded_count = | |
| 82 PerfDataManager::create_counter(JAVA_CLS, "loadedClasses", | |
| 83 PerfData::U_Events, CHECK); | |
| 84 | |
| 85 _classes_unloaded_count = | |
| 86 PerfDataManager::create_counter(JAVA_CLS, "unloadedClasses", | |
| 87 PerfData::U_Events, CHECK); | |
| 88 | |
| 89 _shared_classes_loaded_count = | |
| 90 PerfDataManager::create_counter(JAVA_CLS, "sharedLoadedClasses", | |
| 91 PerfData::U_Events, CHECK); | |
| 92 | |
| 93 _shared_classes_unloaded_count = | |
| 94 PerfDataManager::create_counter(JAVA_CLS, "sharedUnloadedClasses", | |
| 95 PerfData::U_Events, CHECK); | |
| 96 | |
| 97 if (UsePerfData) { | |
| 98 _classbytes_loaded = | |
| 99 PerfDataManager::create_counter(SUN_CLS, "loadedBytes", | |
| 100 PerfData::U_Bytes, CHECK); | |
| 101 | |
| 102 _classbytes_unloaded = | |
| 103 PerfDataManager::create_counter(SUN_CLS, "unloadedBytes", | |
| 104 PerfData::U_Bytes, CHECK); | |
| 105 _shared_classbytes_loaded = | |
| 106 PerfDataManager::create_counter(SUN_CLS, "sharedLoadedBytes", | |
| 107 PerfData::U_Bytes, CHECK); | |
| 108 | |
| 109 _shared_classbytes_unloaded = | |
| 110 PerfDataManager::create_counter(SUN_CLS, "sharedUnloadedBytes", | |
| 111 PerfData::U_Bytes, CHECK); | |
| 112 _class_methods_size = | |
| 113 PerfDataManager::create_variable(SUN_CLS, "methodBytes", | |
| 114 PerfData::U_Bytes, CHECK); | |
| 115 } | |
| 116 } | |
| 117 | |
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118 void ClassLoadingService::notify_class_unloaded(InstanceKlass* k) { |
| 0 | 119 DTRACE_CLASSLOAD_PROBE(unloaded, k, false); |
| 120 // Classes that can be unloaded must be non-shared | |
| 121 _classes_unloaded_count->inc(); | |
| 122 | |
| 123 if (UsePerfData) { | |
| 124 // add the class size | |
| 125 size_t size = compute_class_size(k); | |
| 126 _classbytes_unloaded->inc(size); | |
| 127 | |
| 128 // Compute method size & subtract from running total. | |
| 129 // We are called during phase 1 of mark sweep, so it's | |
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130 // still ok to iterate through Method*s here. |
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131 Array<Method*>* methods = k->methods(); |
| 0 | 132 for (int i = 0; i < methods->length(); i++) { |
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133 _class_methods_size->inc(-methods->at(i)->size()); |
| 0 | 134 } |
| 135 } | |
| 136 | |
| 137 if (TraceClassUnloading) { | |
| 138 ResourceMark rm; | |
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139 tty->print_cr("[Unloading class %s " INTPTR_FORMAT "]", k->external_name(), k); |
| 0 | 140 } |
| 141 } | |
| 142 | |
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143 void ClassLoadingService::notify_class_loaded(InstanceKlass* k, bool shared_class) { |
| 0 | 144 DTRACE_CLASSLOAD_PROBE(loaded, k, shared_class); |
| 145 PerfCounter* classes_counter = (shared_class ? _shared_classes_loaded_count | |
| 146 : _classes_loaded_count); | |
| 147 // increment the count | |
| 148 classes_counter->inc(); | |
| 149 | |
| 150 if (UsePerfData) { | |
| 151 PerfCounter* classbytes_counter = (shared_class ? _shared_classbytes_loaded | |
| 152 : _classbytes_loaded); | |
| 153 // add the class size | |
| 154 size_t size = compute_class_size(k); | |
| 155 classbytes_counter->inc(size); | |
| 156 } | |
| 157 } | |
| 158 | |
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159 size_t ClassLoadingService::compute_class_size(InstanceKlass* k) { |
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160 // lifted from ClassStatistics.do_class(Klass* k) |
| 0 | 161 |
| 162 size_t class_size = 0; | |
| 163 | |
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164 class_size += k->size(); |
| 0 | 165 |
| 166 if (k->oop_is_instance()) { | |
| 167 class_size += k->methods()->size(); | |
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168 // FIXME: Need to count the contents of methods |
| 0 | 169 class_size += k->constants()->size(); |
| 170 class_size += k->local_interfaces()->size(); | |
| 171 class_size += k->transitive_interfaces()->size(); | |
| 172 // We do not have to count implementors, since we only store one! | |
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173 // FIXME: How should these be accounted for, now when they have moved. |
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174 //class_size += k->fields()->size(); |
| 0 | 175 } |
| 176 return class_size * oopSize; | |
| 177 } | |
| 178 | |
| 179 | |
| 180 bool ClassLoadingService::set_verbose(bool verbose) { | |
| 181 MutexLocker m(Management_lock); | |
| 182 | |
| 183 // verbose will be set to the previous value | |
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184 bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassLoading", &verbose, Flag::MANAGEMENT); |
| 0 | 185 assert(succeed, "Setting TraceClassLoading flag fails"); |
| 186 reset_trace_class_unloading(); | |
| 187 | |
| 188 return verbose; | |
| 189 } | |
| 190 | |
| 191 // Caller to this function must own Management_lock | |
| 192 void ClassLoadingService::reset_trace_class_unloading() { | |
| 193 assert(Management_lock->owned_by_self(), "Must own the Management_lock"); | |
| 194 bool value = MemoryService::get_verbose() || ClassLoadingService::get_verbose(); | |
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195 bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassUnloading", &value, Flag::MANAGEMENT); |
| 0 | 196 assert(succeed, "Setting TraceClassUnLoading flag fails"); |
| 197 } | |
| 198 | |
| 199 GrowableArray<KlassHandle>* LoadedClassesEnumerator::_loaded_classes = NULL; | |
| 200 Thread* LoadedClassesEnumerator::_current_thread = NULL; | |
| 201 | |
| 202 LoadedClassesEnumerator::LoadedClassesEnumerator(Thread* cur_thread) { | |
| 203 assert(cur_thread == Thread::current(), "Check current thread"); | |
| 204 | |
| 205 int init_size = ClassLoadingService::loaded_class_count(); | |
| 206 _klass_handle_array = new GrowableArray<KlassHandle>(init_size); | |
| 207 | |
| 208 // For consistency of the loaded classes, grab the SystemDictionary lock | |
| 209 MutexLocker sd_mutex(SystemDictionary_lock); | |
| 210 | |
| 211 // Set _loaded_classes and _current_thread and begin enumerating all classes. | |
| 212 // Only one thread will do the enumeration at a time. | |
| 213 // These static variables are needed and they are used by the static method | |
| 214 // add_loaded_class called from classes_do(). | |
| 215 _loaded_classes = _klass_handle_array; | |
| 216 _current_thread = cur_thread; | |
| 217 | |
| 218 SystemDictionary::classes_do(&add_loaded_class); | |
| 219 | |
| 220 // FIXME: Exclude array klasses for now | |
| 221 // Universe::basic_type_classes_do(&add_loaded_class); | |
| 222 } | |
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223 |
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224 #endif // INCLUDE_MANAGEMENT |