Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/statSampler.cpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | 1d1603768966 |
| children | 63a4eb8bcd23 |
| rev | line source |
|---|---|
| 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", | |
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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 } |