Mercurial > hg > truffle
annotate src/share/vm/runtime/statSampler.cpp @ 7598:f9bda35f4226
8005816: Shark: fix volatile float field access
Reviewed-by: twisti
Contributed-by: Roman Kennke <rkennke@redhat.com>
author | twisti |
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date | Fri, 11 Jan 2013 16:47:23 -0800 |
parents | 1d1603768966 |
children | 63a4eb8bcd23 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 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 "classfile/vmSymbols.hpp" | |
28 #include "memory/allocation.inline.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "oops/oop.inline.hpp" | |
31 #include "runtime/arguments.hpp" | |
32 #include "runtime/java.hpp" | |
33 #include "runtime/javaCalls.hpp" | |
34 #include "runtime/os.hpp" | |
35 #include "runtime/statSampler.hpp" | |
36 #ifdef TARGET_ARCH_x86 | |
37 # include "vm_version_x86.hpp" | |
38 #endif | |
39 #ifdef TARGET_ARCH_sparc | |
40 # include "vm_version_sparc.hpp" | |
41 #endif | |
42 #ifdef TARGET_ARCH_zero | |
43 # include "vm_version_zero.hpp" | |
44 #endif | |
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45 #ifdef TARGET_ARCH_arm |
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46 # include "vm_version_arm.hpp" |
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47 #endif |
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48 #ifdef TARGET_ARCH_ppc |
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49 # include "vm_version_ppc.hpp" |
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50 #endif |
0 | 51 |
52 // -------------------------------------------------------- | |
53 // StatSamplerTask | |
54 | |
55 class StatSamplerTask : public PeriodicTask { | |
56 public: | |
57 StatSamplerTask(int interval_time) : PeriodicTask(interval_time) {} | |
58 void task() { StatSampler::collect_sample(); } | |
59 }; | |
60 | |
61 | |
62 //---------------------------------------------------------- | |
63 // Implementation of StatSampler | |
64 | |
65 StatSamplerTask* StatSampler::_task = NULL; | |
66 PerfDataList* StatSampler::_sampled = NULL; | |
67 | |
68 /* | |
69 * the initialize method is called from the engage() method | |
70 * and is responsible for initializing various global variables. | |
71 */ | |
72 void StatSampler::initialize() { | |
73 | |
74 if (!UsePerfData) return; | |
75 | |
76 // create performance data that could not be created prior | |
77 // to vm_init_globals() or otherwise have no logical home. | |
78 | |
79 create_misc_perfdata(); | |
80 | |
81 // get copy of the sampled list | |
82 _sampled = PerfDataManager::sampled(); | |
83 | |
84 } | |
85 | |
86 /* | |
87 * The engage() method is called at initialization time via | |
88 * Thread::create_vm() to initialize the StatSampler and | |
89 * register it with the WatcherThread as a periodic task. | |
90 */ | |
91 void StatSampler::engage() { | |
92 | |
93 if (!UsePerfData) return; | |
94 | |
95 if (!is_active()) { | |
96 | |
97 initialize(); | |
98 | |
99 // start up the periodic task | |
100 _task = new StatSamplerTask(PerfDataSamplingInterval); | |
101 _task->enroll(); | |
102 } | |
103 } | |
104 | |
105 | |
106 /* | |
107 * the disengage() method is responsible for deactivating the periodic | |
108 * task and, if logging was enabled, for logging the final sample. This | |
109 * method is called from before_exit() in java.cpp and is only called | |
110 * after the WatcherThread has been stopped. | |
111 */ | |
112 void StatSampler::disengage() { | |
113 | |
114 if (!UsePerfData) return; | |
115 | |
116 if (!is_active()) | |
117 return; | |
118 | |
119 // remove StatSamplerTask | |
120 _task->disenroll(); | |
121 delete _task; | |
122 _task = NULL; | |
123 | |
124 // force a final sample | |
125 sample_data(_sampled); | |
126 } | |
127 | |
128 /* | |
129 * the destroy method is responsible for releasing any resources used by | |
130 * the StatSampler prior to shutdown of the VM. this method is called from | |
131 * before_exit() in java.cpp and is only called after the WatcherThread | |
132 * has stopped. | |
133 */ | |
134 void StatSampler::destroy() { | |
135 | |
136 if (!UsePerfData) return; | |
137 | |
138 if (_sampled != NULL) { | |
139 delete(_sampled); | |
140 _sampled = NULL; | |
141 } | |
142 } | |
143 | |
144 /* | |
145 * The sample_data() method is responsible for sampling the | |
146 * the data value for each PerfData instance in the given list. | |
147 */ | |
148 void StatSampler::sample_data(PerfDataList* list) { | |
149 | |
150 assert(list != NULL, "null list unexpected"); | |
151 | |
152 for (int index = 0; index < list->length(); index++) { | |
153 PerfData* item = list->at(index); | |
154 item->sample(); | |
155 } | |
156 } | |
157 | |
158 /* | |
159 * the collect_sample() method is the method invoked by the | |
160 * WatcherThread via the PeriodicTask::task() method. This method | |
161 * is responsible for collecting data samples from sampled | |
162 * PerfData instances every PerfDataSamplingInterval milliseconds. | |
163 * It is also responsible for logging the requested set of | |
164 * PerfData instances every _sample_count milliseconds. While | |
165 * logging data, it will output a column header after every _print_header | |
166 * rows of data have been logged. | |
167 */ | |
168 void StatSampler::collect_sample() { | |
169 | |
170 // future - check for new PerfData objects. PerfData objects might | |
171 // get added to the PerfDataManager lists after we have already | |
172 // built our local copies. | |
173 // | |
174 // if (PerfDataManager::count() > previous) { | |
175 // // get a new copy of the sampled list | |
176 // if (_sampled != NULL) { | |
177 // delete(_sampled); | |
178 // _sampled = NULL; | |
179 // } | |
180 // _sampled = PerfDataManager::sampled(); | |
181 // } | |
182 | |
183 assert(_sampled != NULL, "list not initialized"); | |
184 | |
185 sample_data(_sampled); | |
186 } | |
187 | |
188 /* | |
189 * method to upcall into Java to return the value of the specified | |
190 * property as a utf8 string, or NULL if does not exist. The caller | |
191 * is responsible for setting a ResourceMark for proper cleanup of | |
192 * the utf8 strings. | |
193 */ | |
194 const char* StatSampler::get_system_property(const char* name, TRAPS) { | |
195 | |
196 // setup the arguments to getProperty | |
197 Handle key_str = java_lang_String::create_from_str(name, CHECK_NULL); | |
198 | |
199 // return value | |
200 JavaValue result(T_OBJECT); | |
201 | |
202 // public static String getProperty(String key, String def); | |
203 JavaCalls::call_static(&result, | |
1142 | 204 KlassHandle(THREAD, SystemDictionary::System_klass()), |
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205 vmSymbols::getProperty_name(), |
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206 vmSymbols::string_string_signature(), |
0 | 207 key_str, |
208 CHECK_NULL); | |
209 | |
210 oop value_oop = (oop)result.get_jobject(); | |
211 if (value_oop == NULL) { | |
212 return NULL; | |
213 } | |
214 | |
215 // convert Java String to utf8 string | |
216 char* value = java_lang_String::as_utf8_string(value_oop); | |
217 | |
218 return value; | |
219 } | |
220 | |
221 /* | |
222 * The list of System Properties that have corresponding PerfData | |
223 * string instrumentation created by retrieving the named property's | |
224 * value from System.getProperty() and unconditionally creating a | |
225 * PerfStringConstant object initialized to the retreived value. This | |
226 * is not an exhustive list of Java properties with corresponding string | |
227 * instrumentation as the create_system_property_instrumentation() method | |
228 * creates other property based instrumentation conditionally. | |
229 */ | |
230 | |
231 // stable interface, supported counters | |
232 static const char* property_counters_ss[] = { | |
233 "java.vm.specification.version", | |
234 "java.vm.specification.name", | |
235 "java.vm.specification.vendor", | |
236 "java.vm.version", | |
237 "java.vm.name", | |
238 "java.vm.vendor", | |
239 "java.vm.info", | |
240 "java.library.path", | |
241 "java.class.path", | |
242 "java.endorsed.dirs", | |
243 "java.ext.dirs", | |
279
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244 "java.version", |
0 | 245 "java.home", |
246 NULL | |
247 }; | |
248 | |
249 // unstable interface, supported counters | |
250 static const char* property_counters_us[] = { | |
251 NULL | |
252 }; | |
253 | |
254 // unstable interface, unsupported counters | |
255 static const char* property_counters_uu[] = { | |
256 "sun.boot.class.path", | |
257 "sun.boot.library.path", | |
258 NULL | |
259 }; | |
260 | |
261 typedef struct { | |
262 const char** property_list; | |
263 CounterNS name_space; | |
264 } PropertyCounters; | |
265 | |
266 static PropertyCounters property_counters[] = { | |
267 { property_counters_ss, JAVA_PROPERTY }, | |
268 { property_counters_us, COM_PROPERTY }, | |
269 { property_counters_uu, SUN_PROPERTY }, | |
270 { NULL, SUN_PROPERTY } | |
271 }; | |
272 | |
273 | |
274 /* | |
275 * Method to create PerfData string instruments that contain the values | |
276 * of various system properties. String instruments are created for each | |
277 * property specified in the property lists provided in property_counters[]. | |
278 * Property counters have a counter name space prefix prepended to the | |
279 * property name as indicated in property_counters[]. | |
280 */ | |
281 void StatSampler::create_system_property_instrumentation(TRAPS) { | |
282 | |
283 ResourceMark rm; | |
284 | |
285 for (int i = 0; property_counters[i].property_list != NULL; i++) { | |
286 | |
287 for (int j = 0; property_counters[i].property_list[j] != NULL; j++) { | |
288 | |
289 const char* property_name = property_counters[i].property_list[j]; | |
290 assert(property_name != NULL, "property name should not be NULL"); | |
291 | |
292 const char* value = get_system_property(property_name, CHECK); | |
293 | |
294 // the property must exist | |
295 assert(value != NULL, "property name should be valid"); | |
296 | |
297 if (value != NULL) { | |
298 // create the property counter | |
299 PerfDataManager::create_string_constant(property_counters[i].name_space, | |
300 property_name, value, CHECK); | |
301 } | |
302 } | |
303 } | |
304 } | |
305 | |
306 /* | |
307 * The create_misc_perfdata() method provides a place to create | |
308 * PerfData instances that would otherwise have no better place | |
309 * to exist. | |
310 */ | |
311 void StatSampler::create_misc_perfdata() { | |
312 | |
313 ResourceMark rm; | |
314 EXCEPTION_MARK; | |
315 | |
316 // numeric constants | |
317 | |
318 // frequency of the native high resolution timer | |
319 PerfDataManager::create_constant(SUN_OS, "hrt.frequency", | |
320 PerfData::U_Hertz, os::elapsed_frequency(), | |
321 CHECK); | |
322 | |
323 // string constants | |
324 | |
325 // create string instrumentation for various Java properties. | |
326 create_system_property_instrumentation(CHECK); | |
327 | |
328 // hotspot flags (from .hotspotrc) and args (from command line) | |
329 // | |
330 PerfDataManager::create_string_constant(JAVA_RT, "vmFlags", | |
331 Arguments::jvm_flags(), CHECK); | |
332 PerfDataManager::create_string_constant(JAVA_RT, "vmArgs", | |
333 Arguments::jvm_args(), CHECK); | |
334 | |
335 // java class name/jar file and arguments to main class | |
336 // note: name is cooridnated with launcher and Arguments.cpp | |
337 PerfDataManager::create_string_constant(SUN_RT, "javaCommand", | |
338 Arguments::java_command(), CHECK); | |
339 | |
340 // the Java VM Internal version string | |
341 PerfDataManager::create_string_constant(SUN_RT, "internalVersion", | |
342 VM_Version::internal_vm_info_string(), | |
343 CHECK); | |
344 | |
345 // create sampled instrumentation objects | |
346 create_sampled_perfdata(); | |
347 } | |
348 | |
349 /* | |
350 * helper class to provide for sampling of the elapsed_counter value | |
351 * maintained in the OS class. | |
352 */ | |
353 class HighResTimeSampler : public PerfSampleHelper { | |
354 public: | |
355 jlong take_sample() { return os::elapsed_counter(); } | |
356 }; | |
357 | |
358 /* | |
359 * the create_sampled_perdata() method provides a place to instantiate | |
360 * sampled PerfData instances that would otherwise have no better place | |
361 * to exist. | |
362 */ | |
363 void StatSampler::create_sampled_perfdata() { | |
364 | |
365 EXCEPTION_MARK; | |
366 | |
367 // setup sampling of the elapsed time counter maintained in the | |
368 // the os class. This counter can be used as either a time stamp | |
369 // for each logged entry or as a liveness indicator for the VM. | |
370 PerfSampleHelper* psh = new HighResTimeSampler(); | |
371 PerfDataManager::create_counter(SUN_OS, "hrt.ticks", | |
372 PerfData::U_Ticks, psh, CHECK); | |
373 } | |
374 | |
375 /* | |
376 * the statSampler_exit() function is called from os_init.cpp on | |
377 * exit of the vm. | |
378 */ | |
379 void statSampler_exit() { | |
380 | |
381 if (!UsePerfData) return; | |
382 | |
383 StatSampler::destroy(); | |
384 } |