Mercurial > hg > truffle
annotate src/share/vm/services/classLoadingService.cpp @ 3763:e66f38dd58a9
Merge
author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | 1d1603768966 |
children | 436b4a3231bf |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, 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" | |
0 | 34 |
35 #ifdef DTRACE_ENABLED | |
36 | |
37 // Only bother with this argument setup if dtrace is available | |
38 | |
39 HS_DTRACE_PROBE_DECL4(hotspot, class__loaded, char*, int, oop, bool); | |
40 HS_DTRACE_PROBE_DECL4(hotspot, class__unloaded, char*, int, oop, bool); | |
41 | |
42 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) \ | |
43 { \ | |
44 char* data = NULL; \ | |
45 int len = 0; \ | |
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46 Symbol* name = (clss)->name(); \ |
0 | 47 if (name != NULL) { \ |
48 data = (char*)name->bytes(); \ | |
49 len = name->utf8_length(); \ | |
50 } \ | |
51 HS_DTRACE_PROBE4(hotspot, class__##type, \ | |
52 data, len, (clss)->class_loader(), (shared)); \ | |
53 } | |
54 | |
55 #else // ndef DTRACE_ENABLED | |
56 | |
57 #define DTRACE_CLASSLOAD_PROBE(type, clss, shared) | |
58 | |
59 #endif | |
60 | |
61 // counters for classes loaded from class files | |
62 PerfCounter* ClassLoadingService::_classes_loaded_count = NULL; | |
63 PerfCounter* ClassLoadingService::_classes_unloaded_count = NULL; | |
64 PerfCounter* ClassLoadingService::_classbytes_loaded = NULL; | |
65 PerfCounter* ClassLoadingService::_classbytes_unloaded = NULL; | |
66 | |
67 // counters for classes loaded from shared archive | |
68 PerfCounter* ClassLoadingService::_shared_classes_loaded_count = NULL; | |
69 PerfCounter* ClassLoadingService::_shared_classes_unloaded_count = NULL; | |
70 PerfCounter* ClassLoadingService::_shared_classbytes_loaded = NULL; | |
71 PerfCounter* ClassLoadingService::_shared_classbytes_unloaded = NULL; | |
72 PerfVariable* ClassLoadingService::_class_methods_size = NULL; | |
73 | |
74 void ClassLoadingService::init() { | |
75 EXCEPTION_MARK; | |
76 | |
77 // These counters are for java.lang.management API support. | |
78 // They are created even if -XX:-UsePerfData is set and in | |
79 // that case, they will be allocated on C heap. | |
80 _classes_loaded_count = | |
81 PerfDataManager::create_counter(JAVA_CLS, "loadedClasses", | |
82 PerfData::U_Events, CHECK); | |
83 | |
84 _classes_unloaded_count = | |
85 PerfDataManager::create_counter(JAVA_CLS, "unloadedClasses", | |
86 PerfData::U_Events, CHECK); | |
87 | |
88 _shared_classes_loaded_count = | |
89 PerfDataManager::create_counter(JAVA_CLS, "sharedLoadedClasses", | |
90 PerfData::U_Events, CHECK); | |
91 | |
92 _shared_classes_unloaded_count = | |
93 PerfDataManager::create_counter(JAVA_CLS, "sharedUnloadedClasses", | |
94 PerfData::U_Events, CHECK); | |
95 | |
96 if (UsePerfData) { | |
97 _classbytes_loaded = | |
98 PerfDataManager::create_counter(SUN_CLS, "loadedBytes", | |
99 PerfData::U_Bytes, CHECK); | |
100 | |
101 _classbytes_unloaded = | |
102 PerfDataManager::create_counter(SUN_CLS, "unloadedBytes", | |
103 PerfData::U_Bytes, CHECK); | |
104 _shared_classbytes_loaded = | |
105 PerfDataManager::create_counter(SUN_CLS, "sharedLoadedBytes", | |
106 PerfData::U_Bytes, CHECK); | |
107 | |
108 _shared_classbytes_unloaded = | |
109 PerfDataManager::create_counter(SUN_CLS, "sharedUnloadedBytes", | |
110 PerfData::U_Bytes, CHECK); | |
111 _class_methods_size = | |
112 PerfDataManager::create_variable(SUN_CLS, "methodBytes", | |
113 PerfData::U_Bytes, CHECK); | |
114 } | |
115 } | |
116 | |
117 void ClassLoadingService::notify_class_unloaded(instanceKlass* k) { | |
118 DTRACE_CLASSLOAD_PROBE(unloaded, k, false); | |
119 // Classes that can be unloaded must be non-shared | |
120 _classes_unloaded_count->inc(); | |
121 | |
122 if (UsePerfData) { | |
123 // add the class size | |
124 size_t size = compute_class_size(k); | |
125 _classbytes_unloaded->inc(size); | |
126 | |
127 // Compute method size & subtract from running total. | |
128 // We are called during phase 1 of mark sweep, so it's | |
129 // still ok to iterate through methodOops here. | |
130 objArrayOop methods = k->methods(); | |
131 for (int i = 0; i < methods->length(); i++) { | |
132 _class_methods_size->inc(-methods->obj_at(i)->size()); | |
133 } | |
134 } | |
135 | |
136 if (TraceClassUnloading) { | |
137 ResourceMark rm; | |
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138 tty->print_cr("[Unloading class %s]", k->external_name()); |
0 | 139 } |
140 } | |
141 | |
142 void ClassLoadingService::notify_class_loaded(instanceKlass* k, bool shared_class) { | |
143 DTRACE_CLASSLOAD_PROBE(loaded, k, shared_class); | |
144 PerfCounter* classes_counter = (shared_class ? _shared_classes_loaded_count | |
145 : _classes_loaded_count); | |
146 // increment the count | |
147 classes_counter->inc(); | |
148 | |
149 if (UsePerfData) { | |
150 PerfCounter* classbytes_counter = (shared_class ? _shared_classbytes_loaded | |
151 : _classbytes_loaded); | |
152 // add the class size | |
153 size_t size = compute_class_size(k); | |
154 classbytes_counter->inc(size); | |
155 } | |
156 } | |
157 | |
158 size_t ClassLoadingService::compute_class_size(instanceKlass* k) { | |
159 // lifted from ClassStatistics.do_class(klassOop k) | |
160 | |
161 size_t class_size = 0; | |
162 | |
163 class_size += k->as_klassOop()->size(); | |
164 | |
165 if (k->oop_is_instance()) { | |
166 class_size += k->methods()->size(); | |
167 class_size += k->constants()->size(); | |
168 class_size += k->local_interfaces()->size(); | |
169 class_size += k->transitive_interfaces()->size(); | |
170 // We do not have to count implementors, since we only store one! | |
171 class_size += k->fields()->size(); | |
172 } | |
173 return class_size * oopSize; | |
174 } | |
175 | |
176 | |
177 bool ClassLoadingService::set_verbose(bool verbose) { | |
178 MutexLocker m(Management_lock); | |
179 | |
180 // verbose will be set to the previous value | |
181 bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassLoading", &verbose, MANAGEMENT); | |
182 assert(succeed, "Setting TraceClassLoading flag fails"); | |
183 reset_trace_class_unloading(); | |
184 | |
185 return verbose; | |
186 } | |
187 | |
188 // Caller to this function must own Management_lock | |
189 void ClassLoadingService::reset_trace_class_unloading() { | |
190 assert(Management_lock->owned_by_self(), "Must own the Management_lock"); | |
191 bool value = MemoryService::get_verbose() || ClassLoadingService::get_verbose(); | |
192 bool succeed = CommandLineFlags::boolAtPut((char*)"TraceClassUnloading", &value, MANAGEMENT); | |
193 assert(succeed, "Setting TraceClassUnLoading flag fails"); | |
194 } | |
195 | |
196 GrowableArray<KlassHandle>* LoadedClassesEnumerator::_loaded_classes = NULL; | |
197 Thread* LoadedClassesEnumerator::_current_thread = NULL; | |
198 | |
199 LoadedClassesEnumerator::LoadedClassesEnumerator(Thread* cur_thread) { | |
200 assert(cur_thread == Thread::current(), "Check current thread"); | |
201 | |
202 int init_size = ClassLoadingService::loaded_class_count(); | |
203 _klass_handle_array = new GrowableArray<KlassHandle>(init_size); | |
204 | |
205 // For consistency of the loaded classes, grab the SystemDictionary lock | |
206 MutexLocker sd_mutex(SystemDictionary_lock); | |
207 | |
208 // Set _loaded_classes and _current_thread and begin enumerating all classes. | |
209 // Only one thread will do the enumeration at a time. | |
210 // These static variables are needed and they are used by the static method | |
211 // add_loaded_class called from classes_do(). | |
212 _loaded_classes = _klass_handle_array; | |
213 _current_thread = cur_thread; | |
214 | |
215 SystemDictionary::classes_do(&add_loaded_class); | |
216 | |
217 // FIXME: Exclude array klasses for now | |
218 // Universe::basic_type_classes_do(&add_loaded_class); | |
219 } |