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annotate src/share/vm/services/classLoadingService.cpp @ 14189:1a899ea6b7ed
8031305: (hotspot) com.sun.management.VMOption is missing the ATTACH_ON_DEMAND origin
Reviewed-by: jbachorik, mchung, dholmes
author | sla |
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date | Tue, 07 Jan 2014 12:32:57 +0100 |
parents | 268e7a2178d7 |
children | e6195383bcaf 78bbf4d43a14 |
rev | line source |
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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 #ifndef USDT2 |
41 | |
0 | 42 HS_DTRACE_PROBE_DECL4(hotspot, class__loaded, char*, int, oop, bool); |
43 HS_DTRACE_PROBE_DECL4(hotspot, class__unloaded, char*, int, oop, bool); | |
44 | |
45 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) \ | |
46 { \ | |
47 char* data = NULL; \ | |
48 int len = 0; \ | |
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49 Symbol* name = (clss)->name(); \ |
0 | 50 if (name != NULL) { \ |
51 data = (char*)name->bytes(); \ | |
52 len = name->utf8_length(); \ | |
53 } \ | |
54 HS_DTRACE_PROBE4(hotspot, class__##type, \ | |
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55 data, len, SOLARIS_ONLY((void *))(clss)->class_loader(), (shared)); \ |
0 | 56 } |
57 | |
4006 | 58 #else /* USDT2 */ |
59 | |
60 #define HOTSPOT_CLASS_unloaded HOTSPOT_CLASS_UNLOADED | |
61 #define HOTSPOT_CLASS_loaded HOTSPOT_CLASS_LOADED | |
62 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) \ | |
63 { \ | |
64 char* data = NULL; \ | |
65 int len = 0; \ | |
66 Symbol* name = (clss)->name(); \ | |
67 if (name != NULL) { \ | |
68 data = (char*)name->bytes(); \ | |
69 len = name->utf8_length(); \ | |
70 } \ | |
71 HOTSPOT_CLASS_##type( /* type = unloaded, loaded */ \ | |
72 data, len, (clss)->class_loader(), (shared)); \ | |
73 } | |
74 | |
75 #endif /* USDT2 */ | |
0 | 76 #else // ndef DTRACE_ENABLED |
77 | |
78 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) | |
79 | |
80 #endif | |
81 | |
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82 #if INCLUDE_MANAGEMENT |
0 | 83 // counters for classes loaded from class files |
84 PerfCounter* ClassLoadingService::_classes_loaded_count = NULL; | |
85 PerfCounter* ClassLoadingService::_classes_unloaded_count = NULL; | |
86 PerfCounter* ClassLoadingService::_classbytes_loaded = NULL; | |
87 PerfCounter* ClassLoadingService::_classbytes_unloaded = NULL; | |
88 | |
89 // counters for classes loaded from shared archive | |
90 PerfCounter* ClassLoadingService::_shared_classes_loaded_count = NULL; | |
91 PerfCounter* ClassLoadingService::_shared_classes_unloaded_count = NULL; | |
92 PerfCounter* ClassLoadingService::_shared_classbytes_loaded = NULL; | |
93 PerfCounter* ClassLoadingService::_shared_classbytes_unloaded = NULL; | |
94 PerfVariable* ClassLoadingService::_class_methods_size = NULL; | |
95 | |
96 void ClassLoadingService::init() { | |
97 EXCEPTION_MARK; | |
98 | |
99 // These counters are for java.lang.management API support. | |
100 // They are created even if -XX:-UsePerfData is set and in | |
101 // that case, they will be allocated on C heap. | |
102 _classes_loaded_count = | |
103 PerfDataManager::create_counter(JAVA_CLS, "loadedClasses", | |
104 PerfData::U_Events, CHECK); | |
105 | |
106 _classes_unloaded_count = | |
107 PerfDataManager::create_counter(JAVA_CLS, "unloadedClasses", | |
108 PerfData::U_Events, CHECK); | |
109 | |
110 _shared_classes_loaded_count = | |
111 PerfDataManager::create_counter(JAVA_CLS, "sharedLoadedClasses", | |
112 PerfData::U_Events, CHECK); | |
113 | |
114 _shared_classes_unloaded_count = | |
115 PerfDataManager::create_counter(JAVA_CLS, "sharedUnloadedClasses", | |
116 PerfData::U_Events, CHECK); | |
117 | |
118 if (UsePerfData) { | |
119 _classbytes_loaded = | |
120 PerfDataManager::create_counter(SUN_CLS, "loadedBytes", | |
121 PerfData::U_Bytes, CHECK); | |
122 | |
123 _classbytes_unloaded = | |
124 PerfDataManager::create_counter(SUN_CLS, "unloadedBytes", | |
125 PerfData::U_Bytes, CHECK); | |
126 _shared_classbytes_loaded = | |
127 PerfDataManager::create_counter(SUN_CLS, "sharedLoadedBytes", | |
128 PerfData::U_Bytes, CHECK); | |
129 | |
130 _shared_classbytes_unloaded = | |
131 PerfDataManager::create_counter(SUN_CLS, "sharedUnloadedBytes", | |
132 PerfData::U_Bytes, CHECK); | |
133 _class_methods_size = | |
134 PerfDataManager::create_variable(SUN_CLS, "methodBytes", | |
135 PerfData::U_Bytes, CHECK); | |
136 } | |
137 } | |
138 | |
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139 void ClassLoadingService::notify_class_unloaded(InstanceKlass* k) { |
0 | 140 DTRACE_CLASSLOAD_PROBE(unloaded, k, false); |
141 // Classes that can be unloaded must be non-shared | |
142 _classes_unloaded_count->inc(); | |
143 | |
144 if (UsePerfData) { | |
145 // add the class size | |
146 size_t size = compute_class_size(k); | |
147 _classbytes_unloaded->inc(size); | |
148 | |
149 // Compute method size & subtract from running total. | |
150 // We are called during phase 1 of mark sweep, so it's | |
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151 // still ok to iterate through Method*s here. |
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152 Array<Method*>* methods = k->methods(); |
0 | 153 for (int i = 0; i < methods->length(); i++) { |
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154 _class_methods_size->inc(-methods->at(i)->size()); |
0 | 155 } |
156 } | |
157 | |
158 if (TraceClassUnloading) { | |
159 ResourceMark rm; | |
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160 tty->print_cr("[Unloading class %s " INTPTR_FORMAT "]", k->external_name(), k); |
0 | 161 } |
162 } | |
163 | |
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164 void ClassLoadingService::notify_class_loaded(InstanceKlass* k, bool shared_class) { |
0 | 165 DTRACE_CLASSLOAD_PROBE(loaded, k, shared_class); |
166 PerfCounter* classes_counter = (shared_class ? _shared_classes_loaded_count | |
167 : _classes_loaded_count); | |
168 // increment the count | |
169 classes_counter->inc(); | |
170 | |
171 if (UsePerfData) { | |
172 PerfCounter* classbytes_counter = (shared_class ? _shared_classbytes_loaded | |
173 : _classbytes_loaded); | |
174 // add the class size | |
175 size_t size = compute_class_size(k); | |
176 classbytes_counter->inc(size); | |
177 } | |
178 } | |
179 | |
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180 size_t ClassLoadingService::compute_class_size(InstanceKlass* k) { |
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181 // lifted from ClassStatistics.do_class(Klass* k) |
0 | 182 |
183 size_t class_size = 0; | |
184 | |
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185 class_size += k->size(); |
0 | 186 |
187 if (k->oop_is_instance()) { | |
188 class_size += k->methods()->size(); | |
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189 // FIXME: Need to count the contents of methods |
0 | 190 class_size += k->constants()->size(); |
191 class_size += k->local_interfaces()->size(); | |
192 class_size += k->transitive_interfaces()->size(); | |
193 // We do not have to count implementors, since we only store one! | |
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194 // FIXME: How should these be accounted for, now when they have moved. |
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195 //class_size += k->fields()->size(); |
0 | 196 } |
197 return class_size * oopSize; | |
198 } | |
199 | |
200 | |
201 bool ClassLoadingService::set_verbose(bool verbose) { | |
202 MutexLocker m(Management_lock); | |
203 | |
204 // verbose will be set to the previous value | |
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205 bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassLoading", &verbose, Flag::MANAGEMENT); |
0 | 206 assert(succeed, "Setting TraceClassLoading flag fails"); |
207 reset_trace_class_unloading(); | |
208 | |
209 return verbose; | |
210 } | |
211 | |
212 // Caller to this function must own Management_lock | |
213 void ClassLoadingService::reset_trace_class_unloading() { | |
214 assert(Management_lock->owned_by_self(), "Must own the Management_lock"); | |
215 bool value = MemoryService::get_verbose() || ClassLoadingService::get_verbose(); | |
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216 bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassUnloading", &value, Flag::MANAGEMENT); |
0 | 217 assert(succeed, "Setting TraceClassUnLoading flag fails"); |
218 } | |
219 | |
220 GrowableArray<KlassHandle>* LoadedClassesEnumerator::_loaded_classes = NULL; | |
221 Thread* LoadedClassesEnumerator::_current_thread = NULL; | |
222 | |
223 LoadedClassesEnumerator::LoadedClassesEnumerator(Thread* cur_thread) { | |
224 assert(cur_thread == Thread::current(), "Check current thread"); | |
225 | |
226 int init_size = ClassLoadingService::loaded_class_count(); | |
227 _klass_handle_array = new GrowableArray<KlassHandle>(init_size); | |
228 | |
229 // For consistency of the loaded classes, grab the SystemDictionary lock | |
230 MutexLocker sd_mutex(SystemDictionary_lock); | |
231 | |
232 // Set _loaded_classes and _current_thread and begin enumerating all classes. | |
233 // Only one thread will do the enumeration at a time. | |
234 // These static variables are needed and they are used by the static method | |
235 // add_loaded_class called from classes_do(). | |
236 _loaded_classes = _klass_handle_array; | |
237 _current_thread = cur_thread; | |
238 | |
239 SystemDictionary::classes_do(&add_loaded_class); | |
240 | |
241 // FIXME: Exclude array klasses for now | |
242 // Universe::basic_type_classes_do(&add_loaded_class); | |
243 } | |
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244 |
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245 #endif // INCLUDE_MANAGEMENT |