Mercurial > hg > truffle
annotate src/share/vm/services/classLoadingService.cpp @ 14578:d927132f45a4
update comments on BenchmarkCounters (-XX options instead of preprocessor defs)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Tue, 18 Mar 2014 09:59:33 +0100 |
parents | e6195383bcaf |
children | 4ca6dc0799b6 |
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 #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 |