Wed, 03 Jul 2019 20:42:37 +0800
Merge
aoqi@0 | 1 | /* |
aoqi@423 | 2 | * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "classfile/systemDictionary.hpp" |
aoqi@0 | 27 | #include "memory/allocation.hpp" |
aoqi@0 | 28 | #include "memory/universe.hpp" |
aoqi@0 | 29 | #include "oops/oop.inline.hpp" |
aoqi@0 | 30 | #include "runtime/mutexLocker.hpp" |
aoqi@0 | 31 | #include "services/classLoadingService.hpp" |
aoqi@0 | 32 | #include "services/memoryService.hpp" |
aoqi@0 | 33 | #include "utilities/dtrace.hpp" |
aoqi@0 | 34 | #include "utilities/macros.hpp" |
aoqi@0 | 35 | |
aoqi@0 | 36 | #ifdef DTRACE_ENABLED |
aoqi@0 | 37 | |
aoqi@0 | 38 | // Only bother with this argument setup if dtrace is available |
aoqi@0 | 39 | |
aoqi@0 | 40 | #ifndef USDT2 |
aoqi@0 | 41 | |
aoqi@0 | 42 | HS_DTRACE_PROBE_DECL4(hotspot, class__loaded, char*, int, oop, bool); |
aoqi@0 | 43 | HS_DTRACE_PROBE_DECL4(hotspot, class__unloaded, char*, int, oop, bool); |
aoqi@0 | 44 | |
aoqi@0 | 45 | #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) \ |
aoqi@0 | 46 | { \ |
aoqi@0 | 47 | char* data = NULL; \ |
aoqi@0 | 48 | int len = 0; \ |
aoqi@0 | 49 | Symbol* name = (clss)->name(); \ |
aoqi@0 | 50 | if (name != NULL) { \ |
aoqi@0 | 51 | data = (char*)name->bytes(); \ |
aoqi@0 | 52 | len = name->utf8_length(); \ |
aoqi@0 | 53 | } \ |
aoqi@0 | 54 | HS_DTRACE_PROBE4(hotspot, class__##type, \ |
aoqi@423 | 55 | data, len, (void *)(clss)->class_loader(), (shared)); \ |
aoqi@0 | 56 | } |
aoqi@0 | 57 | |
aoqi@0 | 58 | #else /* USDT2 */ |
aoqi@0 | 59 | |
aoqi@0 | 60 | #define HOTSPOT_CLASS_unloaded HOTSPOT_CLASS_UNLOADED |
aoqi@0 | 61 | #define HOTSPOT_CLASS_loaded HOTSPOT_CLASS_LOADED |
aoqi@0 | 62 | #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) \ |
aoqi@0 | 63 | { \ |
aoqi@0 | 64 | char* data = NULL; \ |
aoqi@0 | 65 | int len = 0; \ |
aoqi@0 | 66 | Symbol* name = (clss)->name(); \ |
aoqi@0 | 67 | if (name != NULL) { \ |
aoqi@0 | 68 | data = (char*)name->bytes(); \ |
aoqi@0 | 69 | len = name->utf8_length(); \ |
aoqi@0 | 70 | } \ |
aoqi@0 | 71 | HOTSPOT_CLASS_##type( /* type = unloaded, loaded */ \ |
aoqi@0 | 72 | data, len, (clss)->class_loader(), (shared)); \ |
aoqi@0 | 73 | } |
aoqi@0 | 74 | |
aoqi@0 | 75 | #endif /* USDT2 */ |
aoqi@0 | 76 | #else // ndef DTRACE_ENABLED |
aoqi@0 | 77 | |
aoqi@0 | 78 | #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) |
aoqi@0 | 79 | |
aoqi@0 | 80 | #endif |
aoqi@0 | 81 | |
aoqi@0 | 82 | #if INCLUDE_MANAGEMENT |
aoqi@0 | 83 | // counters for classes loaded from class files |
aoqi@0 | 84 | PerfCounter* ClassLoadingService::_classes_loaded_count = NULL; |
aoqi@0 | 85 | PerfCounter* ClassLoadingService::_classes_unloaded_count = NULL; |
aoqi@0 | 86 | PerfCounter* ClassLoadingService::_classbytes_loaded = NULL; |
aoqi@0 | 87 | PerfCounter* ClassLoadingService::_classbytes_unloaded = NULL; |
aoqi@0 | 88 | |
aoqi@0 | 89 | // counters for classes loaded from shared archive |
aoqi@0 | 90 | PerfCounter* ClassLoadingService::_shared_classes_loaded_count = NULL; |
aoqi@0 | 91 | PerfCounter* ClassLoadingService::_shared_classes_unloaded_count = NULL; |
aoqi@0 | 92 | PerfCounter* ClassLoadingService::_shared_classbytes_loaded = NULL; |
aoqi@0 | 93 | PerfCounter* ClassLoadingService::_shared_classbytes_unloaded = NULL; |
aoqi@0 | 94 | PerfVariable* ClassLoadingService::_class_methods_size = NULL; |
aoqi@0 | 95 | |
aoqi@0 | 96 | void ClassLoadingService::init() { |
aoqi@0 | 97 | EXCEPTION_MARK; |
aoqi@0 | 98 | |
aoqi@0 | 99 | // These counters are for java.lang.management API support. |
aoqi@0 | 100 | // They are created even if -XX:-UsePerfData is set and in |
aoqi@0 | 101 | // that case, they will be allocated on C heap. |
aoqi@0 | 102 | _classes_loaded_count = |
aoqi@0 | 103 | PerfDataManager::create_counter(JAVA_CLS, "loadedClasses", |
aoqi@0 | 104 | PerfData::U_Events, CHECK); |
aoqi@0 | 105 | |
aoqi@0 | 106 | _classes_unloaded_count = |
aoqi@0 | 107 | PerfDataManager::create_counter(JAVA_CLS, "unloadedClasses", |
aoqi@0 | 108 | PerfData::U_Events, CHECK); |
aoqi@0 | 109 | |
aoqi@0 | 110 | _shared_classes_loaded_count = |
aoqi@0 | 111 | PerfDataManager::create_counter(JAVA_CLS, "sharedLoadedClasses", |
aoqi@0 | 112 | PerfData::U_Events, CHECK); |
aoqi@0 | 113 | |
aoqi@0 | 114 | _shared_classes_unloaded_count = |
aoqi@0 | 115 | PerfDataManager::create_counter(JAVA_CLS, "sharedUnloadedClasses", |
aoqi@0 | 116 | PerfData::U_Events, CHECK); |
aoqi@0 | 117 | |
aoqi@0 | 118 | if (UsePerfData) { |
aoqi@0 | 119 | _classbytes_loaded = |
aoqi@0 | 120 | PerfDataManager::create_counter(SUN_CLS, "loadedBytes", |
aoqi@0 | 121 | PerfData::U_Bytes, CHECK); |
aoqi@0 | 122 | |
aoqi@0 | 123 | _classbytes_unloaded = |
aoqi@0 | 124 | PerfDataManager::create_counter(SUN_CLS, "unloadedBytes", |
aoqi@0 | 125 | PerfData::U_Bytes, CHECK); |
aoqi@0 | 126 | _shared_classbytes_loaded = |
aoqi@0 | 127 | PerfDataManager::create_counter(SUN_CLS, "sharedLoadedBytes", |
aoqi@0 | 128 | PerfData::U_Bytes, CHECK); |
aoqi@0 | 129 | |
aoqi@0 | 130 | _shared_classbytes_unloaded = |
aoqi@0 | 131 | PerfDataManager::create_counter(SUN_CLS, "sharedUnloadedBytes", |
aoqi@0 | 132 | PerfData::U_Bytes, CHECK); |
aoqi@0 | 133 | _class_methods_size = |
aoqi@0 | 134 | PerfDataManager::create_variable(SUN_CLS, "methodBytes", |
aoqi@0 | 135 | PerfData::U_Bytes, CHECK); |
aoqi@0 | 136 | } |
aoqi@0 | 137 | } |
aoqi@0 | 138 | |
aoqi@0 | 139 | void ClassLoadingService::notify_class_unloaded(InstanceKlass* k) { |
aoqi@0 | 140 | DTRACE_CLASSLOAD_PROBE(unloaded, k, false); |
aoqi@0 | 141 | // Classes that can be unloaded must be non-shared |
aoqi@0 | 142 | _classes_unloaded_count->inc(); |
aoqi@0 | 143 | |
aoqi@0 | 144 | if (UsePerfData) { |
aoqi@0 | 145 | // add the class size |
aoqi@0 | 146 | size_t size = compute_class_size(k); |
aoqi@0 | 147 | _classbytes_unloaded->inc(size); |
aoqi@0 | 148 | |
aoqi@0 | 149 | // Compute method size & subtract from running total. |
aoqi@0 | 150 | // We are called during phase 1 of mark sweep, so it's |
aoqi@0 | 151 | // still ok to iterate through Method*s here. |
aoqi@0 | 152 | Array<Method*>* methods = k->methods(); |
aoqi@0 | 153 | for (int i = 0; i < methods->length(); i++) { |
aoqi@0 | 154 | _class_methods_size->inc(-methods->at(i)->size()); |
aoqi@0 | 155 | } |
aoqi@0 | 156 | } |
aoqi@0 | 157 | |
aoqi@0 | 158 | if (TraceClassUnloading) { |
aoqi@0 | 159 | ResourceMark rm; |
aoqi@0 | 160 | tty->print_cr("[Unloading class %s " INTPTR_FORMAT "]", k->external_name(), p2i(k)); |
aoqi@0 | 161 | } |
aoqi@0 | 162 | } |
aoqi@0 | 163 | |
aoqi@0 | 164 | void ClassLoadingService::notify_class_loaded(InstanceKlass* k, bool shared_class) { |
aoqi@0 | 165 | DTRACE_CLASSLOAD_PROBE(loaded, k, shared_class); |
aoqi@0 | 166 | PerfCounter* classes_counter = (shared_class ? _shared_classes_loaded_count |
aoqi@0 | 167 | : _classes_loaded_count); |
aoqi@0 | 168 | // increment the count |
aoqi@0 | 169 | classes_counter->inc(); |
aoqi@0 | 170 | |
aoqi@0 | 171 | if (UsePerfData) { |
aoqi@0 | 172 | PerfCounter* classbytes_counter = (shared_class ? _shared_classbytes_loaded |
aoqi@0 | 173 | : _classbytes_loaded); |
aoqi@0 | 174 | // add the class size |
aoqi@0 | 175 | size_t size = compute_class_size(k); |
aoqi@0 | 176 | classbytes_counter->inc(size); |
aoqi@0 | 177 | } |
aoqi@0 | 178 | } |
aoqi@0 | 179 | |
aoqi@0 | 180 | size_t ClassLoadingService::compute_class_size(InstanceKlass* k) { |
aoqi@0 | 181 | // lifted from ClassStatistics.do_class(Klass* k) |
aoqi@0 | 182 | |
aoqi@0 | 183 | size_t class_size = 0; |
aoqi@0 | 184 | |
aoqi@0 | 185 | class_size += k->size(); |
aoqi@0 | 186 | |
aoqi@0 | 187 | if (k->oop_is_instance()) { |
aoqi@0 | 188 | class_size += k->methods()->size(); |
aoqi@0 | 189 | // FIXME: Need to count the contents of methods |
aoqi@0 | 190 | class_size += k->constants()->size(); |
aoqi@0 | 191 | class_size += k->local_interfaces()->size(); |
aoqi@0 | 192 | class_size += k->transitive_interfaces()->size(); |
aoqi@0 | 193 | // We do not have to count implementors, since we only store one! |
aoqi@0 | 194 | // FIXME: How should these be accounted for, now when they have moved. |
aoqi@0 | 195 | //class_size += k->fields()->size(); |
aoqi@0 | 196 | } |
aoqi@0 | 197 | return class_size * oopSize; |
aoqi@0 | 198 | } |
aoqi@0 | 199 | |
aoqi@0 | 200 | |
aoqi@0 | 201 | bool ClassLoadingService::set_verbose(bool verbose) { |
aoqi@0 | 202 | MutexLocker m(Management_lock); |
aoqi@0 | 203 | |
aoqi@0 | 204 | // verbose will be set to the previous value |
aoqi@0 | 205 | bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassLoading", &verbose, Flag::MANAGEMENT); |
aoqi@0 | 206 | assert(succeed, "Setting TraceClassLoading flag fails"); |
aoqi@0 | 207 | reset_trace_class_unloading(); |
aoqi@0 | 208 | |
aoqi@0 | 209 | return verbose; |
aoqi@0 | 210 | } |
aoqi@0 | 211 | |
aoqi@0 | 212 | // Caller to this function must own Management_lock |
aoqi@0 | 213 | void ClassLoadingService::reset_trace_class_unloading() { |
aoqi@0 | 214 | assert(Management_lock->owned_by_self(), "Must own the Management_lock"); |
aoqi@0 | 215 | bool value = MemoryService::get_verbose() || ClassLoadingService::get_verbose(); |
aoqi@0 | 216 | bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassUnloading", &value, Flag::MANAGEMENT); |
aoqi@0 | 217 | assert(succeed, "Setting TraceClassUnLoading flag fails"); |
aoqi@0 | 218 | } |
aoqi@0 | 219 | |
aoqi@0 | 220 | GrowableArray<KlassHandle>* LoadedClassesEnumerator::_loaded_classes = NULL; |
aoqi@0 | 221 | Thread* LoadedClassesEnumerator::_current_thread = NULL; |
aoqi@0 | 222 | |
aoqi@0 | 223 | LoadedClassesEnumerator::LoadedClassesEnumerator(Thread* cur_thread) { |
aoqi@0 | 224 | assert(cur_thread == Thread::current(), "Check current thread"); |
aoqi@0 | 225 | |
aoqi@0 | 226 | int init_size = ClassLoadingService::loaded_class_count(); |
aoqi@0 | 227 | _klass_handle_array = new GrowableArray<KlassHandle>(init_size); |
aoqi@0 | 228 | |
aoqi@0 | 229 | // For consistency of the loaded classes, grab the SystemDictionary lock |
aoqi@0 | 230 | MutexLocker sd_mutex(SystemDictionary_lock); |
aoqi@0 | 231 | |
aoqi@0 | 232 | // Set _loaded_classes and _current_thread and begin enumerating all classes. |
aoqi@0 | 233 | // Only one thread will do the enumeration at a time. |
aoqi@0 | 234 | // These static variables are needed and they are used by the static method |
aoqi@0 | 235 | // add_loaded_class called from classes_do(). |
aoqi@0 | 236 | _loaded_classes = _klass_handle_array; |
aoqi@0 | 237 | _current_thread = cur_thread; |
aoqi@0 | 238 | |
aoqi@0 | 239 | SystemDictionary::classes_do(&add_loaded_class); |
aoqi@0 | 240 | |
aoqi@0 | 241 | // FIXME: Exclude array klasses for now |
aoqi@0 | 242 | // Universe::basic_type_classes_do(&add_loaded_class); |
aoqi@0 | 243 | } |
aoqi@0 | 244 | |
aoqi@0 | 245 | #endif // INCLUDE_MANAGEMENT |