Mercurial > hg > truffle
annotate src/share/vm/services/management.cpp @ 4133:3b688d6ff3d0
7104647: Adding a diagnostic command framework
Reviewed-by: phh, dcubed
| author | fparain |
|---|---|
| date | Wed, 14 Dec 2011 04:30:57 -0800 |
| parents | 78542e2b5e35 |
| children | 6c995c08526c |
| rev | line source |
|---|---|
| 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 "compiler/compileBroker.hpp" | |
| 28 #include "memory/iterator.hpp" | |
| 29 #include "memory/oopFactory.hpp" | |
| 30 #include "memory/resourceArea.hpp" | |
| 31 #include "oops/klass.hpp" | |
| 32 #include "oops/klassOop.hpp" | |
| 33 #include "oops/objArrayKlass.hpp" | |
| 34 #include "oops/oop.inline.hpp" | |
| 35 #include "runtime/arguments.hpp" | |
| 36 #include "runtime/handles.inline.hpp" | |
| 37 #include "runtime/interfaceSupport.hpp" | |
| 38 #include "runtime/javaCalls.hpp" | |
| 39 #include "runtime/jniHandles.hpp" | |
| 40 #include "runtime/os.hpp" | |
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41 #include "runtime/serviceThread.hpp" |
| 1972 | 42 #include "services/classLoadingService.hpp" |
| 4133 | 43 #include "services/diagnosticCommand.hpp" |
| 44 #include "services/diagnosticFramework.hpp" | |
| 1972 | 45 #include "services/heapDumper.hpp" |
| 4133 | 46 #include "services/jmm.h" |
| 1972 | 47 #include "services/lowMemoryDetector.hpp" |
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48 #include "services/gcNotifier.hpp" |
| 1972 | 49 #include "services/management.hpp" |
| 50 #include "services/memoryManager.hpp" | |
| 51 #include "services/memoryPool.hpp" | |
| 52 #include "services/memoryService.hpp" | |
| 53 #include "services/runtimeService.hpp" | |
| 54 #include "services/threadService.hpp" | |
| 0 | 55 |
| 56 PerfVariable* Management::_begin_vm_creation_time = NULL; | |
| 57 PerfVariable* Management::_end_vm_creation_time = NULL; | |
| 58 PerfVariable* Management::_vm_init_done_time = NULL; | |
| 59 | |
| 60 klassOop Management::_sensor_klass = NULL; | |
| 61 klassOop Management::_threadInfo_klass = NULL; | |
| 62 klassOop Management::_memoryUsage_klass = NULL; | |
| 63 klassOop Management::_memoryPoolMXBean_klass = NULL; | |
| 64 klassOop Management::_memoryManagerMXBean_klass = NULL; | |
| 65 klassOop Management::_garbageCollectorMXBean_klass = NULL; | |
| 66 klassOop Management::_managementFactory_klass = NULL; | |
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67 klassOop Management::_garbageCollectorImpl_klass = NULL; |
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68 klassOop Management::_gcInfo_klass = NULL; |
| 0 | 69 |
| 70 jmmOptionalSupport Management::_optional_support = {0}; | |
| 71 TimeStamp Management::_stamp; | |
| 72 | |
| 73 void management_init() { | |
| 74 Management::init(); | |
| 75 ThreadService::init(); | |
| 76 RuntimeService::init(); | |
| 77 ClassLoadingService::init(); | |
| 78 } | |
| 79 | |
| 80 void Management::init() { | |
| 81 EXCEPTION_MARK; | |
| 82 | |
| 83 // These counters are for java.lang.management API support. | |
| 84 // They are created even if -XX:-UsePerfData is set and in | |
| 85 // that case, they will be allocated on C heap. | |
| 86 | |
| 87 _begin_vm_creation_time = | |
| 88 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", | |
| 89 PerfData::U_None, CHECK); | |
| 90 | |
| 91 _end_vm_creation_time = | |
| 92 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", | |
| 93 PerfData::U_None, CHECK); | |
| 94 | |
| 95 _vm_init_done_time = | |
| 96 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", | |
| 97 PerfData::U_None, CHECK); | |
| 98 | |
| 99 // Initialize optional support | |
| 100 _optional_support.isLowMemoryDetectionSupported = 1; | |
| 101 _optional_support.isCompilationTimeMonitoringSupported = 1; | |
| 102 _optional_support.isThreadContentionMonitoringSupported = 1; | |
| 103 | |
| 104 if (os::is_thread_cpu_time_supported()) { | |
| 105 _optional_support.isCurrentThreadCpuTimeSupported = 1; | |
| 106 _optional_support.isOtherThreadCpuTimeSupported = 1; | |
| 107 } else { | |
| 108 _optional_support.isCurrentThreadCpuTimeSupported = 0; | |
| 109 _optional_support.isOtherThreadCpuTimeSupported = 0; | |
| 110 } | |
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111 |
| 0 | 112 _optional_support.isBootClassPathSupported = 1; |
| 113 _optional_support.isObjectMonitorUsageSupported = 1; | |
| 114 #ifndef SERVICES_KERNEL | |
| 115 // This depends on the heap inspector | |
| 116 _optional_support.isSynchronizerUsageSupported = 1; | |
| 117 #endif // SERVICES_KERNEL | |
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118 _optional_support.isThreadAllocatedMemorySupported = 1; |
| 4133 | 119 |
| 120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(true, false)); | |
| 121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(true, false)); | |
| 0 | 122 } |
| 123 | |
| 124 void Management::initialize(TRAPS) { | |
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125 // Start the service thread |
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126 ServiceThread::initialize(); |
| 0 | 127 |
| 128 if (ManagementServer) { | |
| 129 ResourceMark rm(THREAD); | |
| 130 HandleMark hm(THREAD); | |
| 131 | |
| 132 // Load and initialize the sun.management.Agent class | |
| 133 // invoke startAgent method to start the management server | |
| 134 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
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135 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), |
| 0 | 136 loader, |
| 137 Handle(), | |
| 138 true, | |
| 139 CHECK); | |
| 140 instanceKlassHandle ik (THREAD, k); | |
| 141 | |
| 142 JavaValue result(T_VOID); | |
| 143 JavaCalls::call_static(&result, | |
| 144 ik, | |
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145 vmSymbols::startAgent_name(), |
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146 vmSymbols::void_method_signature(), |
| 0 | 147 CHECK); |
| 148 } | |
| 149 } | |
| 150 | |
| 151 void Management::get_optional_support(jmmOptionalSupport* support) { | |
| 152 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); | |
| 153 } | |
| 154 | |
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155 klassOop Management::load_and_initialize_klass(Symbol* sh, TRAPS) { |
| 0 | 156 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); |
| 157 instanceKlassHandle ik (THREAD, k); | |
| 158 if (ik->should_be_initialized()) { | |
| 159 ik->initialize(CHECK_NULL); | |
| 160 } | |
| 161 return ik(); | |
| 162 } | |
| 163 | |
| 164 void Management::record_vm_startup_time(jlong begin, jlong duration) { | |
| 165 // if the performance counter is not initialized, | |
| 166 // then vm initialization failed; simply return. | |
| 167 if (_begin_vm_creation_time == NULL) return; | |
| 168 | |
| 169 _begin_vm_creation_time->set_value(begin); | |
| 170 _end_vm_creation_time->set_value(begin + duration); | |
| 171 PerfMemory::set_accessible(true); | |
| 172 } | |
| 173 | |
| 174 jlong Management::timestamp() { | |
| 175 TimeStamp t; | |
| 176 t.update(); | |
| 177 return t.ticks() - _stamp.ticks(); | |
| 178 } | |
| 179 | |
| 180 void Management::oops_do(OopClosure* f) { | |
| 181 MemoryService::oops_do(f); | |
| 182 ThreadService::oops_do(f); | |
| 183 | |
| 184 f->do_oop((oop*) &_sensor_klass); | |
| 185 f->do_oop((oop*) &_threadInfo_klass); | |
| 186 f->do_oop((oop*) &_memoryUsage_klass); | |
| 187 f->do_oop((oop*) &_memoryPoolMXBean_klass); | |
| 188 f->do_oop((oop*) &_memoryManagerMXBean_klass); | |
| 189 f->do_oop((oop*) &_garbageCollectorMXBean_klass); | |
| 190 f->do_oop((oop*) &_managementFactory_klass); | |
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191 f->do_oop((oop*) &_garbageCollectorImpl_klass); |
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192 f->do_oop((oop*) &_gcInfo_klass); |
| 0 | 193 } |
| 194 | |
| 195 klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { | |
| 196 if (_threadInfo_klass == NULL) { | |
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197 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); |
| 0 | 198 } |
| 199 return _threadInfo_klass; | |
| 200 } | |
| 201 | |
| 202 klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) { | |
| 203 if (_memoryUsage_klass == NULL) { | |
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204 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); |
| 0 | 205 } |
| 206 return _memoryUsage_klass; | |
| 207 } | |
| 208 | |
| 209 klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { | |
| 210 if (_memoryPoolMXBean_klass == NULL) { | |
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211 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); |
| 0 | 212 } |
| 213 return _memoryPoolMXBean_klass; | |
| 214 } | |
| 215 | |
| 216 klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { | |
| 217 if (_memoryManagerMXBean_klass == NULL) { | |
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218 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); |
| 0 | 219 } |
| 220 return _memoryManagerMXBean_klass; | |
| 221 } | |
| 222 | |
| 223 klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { | |
| 224 if (_garbageCollectorMXBean_klass == NULL) { | |
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225 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); |
| 0 | 226 } |
| 227 return _garbageCollectorMXBean_klass; | |
| 228 } | |
| 229 | |
| 230 klassOop Management::sun_management_Sensor_klass(TRAPS) { | |
| 231 if (_sensor_klass == NULL) { | |
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232 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); |
| 0 | 233 } |
| 234 return _sensor_klass; | |
| 235 } | |
| 236 | |
| 237 klassOop Management::sun_management_ManagementFactory_klass(TRAPS) { | |
| 238 if (_managementFactory_klass == NULL) { | |
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239 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); |
| 0 | 240 } |
| 241 return _managementFactory_klass; | |
| 242 } | |
| 243 | |
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244 klassOop Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { |
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245 if (_garbageCollectorImpl_klass == NULL) { |
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246 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); |
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247 } |
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248 return _garbageCollectorImpl_klass; |
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249 } |
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250 |
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251 klassOop Management::com_sun_management_GcInfo_klass(TRAPS) { |
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252 if (_gcInfo_klass == NULL) { |
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253 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); |
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254 } |
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255 return _gcInfo_klass; |
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256 } |
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257 |
| 0 | 258 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { |
| 259 Handle snapshot_thread(THREAD, snapshot->threadObj()); | |
| 260 | |
| 261 jlong contended_time; | |
| 262 jlong waited_time; | |
| 263 if (ThreadService::is_thread_monitoring_contention()) { | |
| 264 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); | |
| 265 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); | |
| 266 } else { | |
| 267 // set them to -1 if thread contention monitoring is disabled. | |
| 268 contended_time = max_julong; | |
| 269 waited_time = max_julong; | |
| 270 } | |
| 271 | |
| 272 int thread_status = snapshot->thread_status(); | |
| 273 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); | |
| 274 if (snapshot->is_ext_suspended()) { | |
| 275 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; | |
| 276 } | |
| 277 if (snapshot->is_in_native()) { | |
| 278 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; | |
| 279 } | |
| 280 | |
| 281 ThreadStackTrace* st = snapshot->get_stack_trace(); | |
| 282 Handle stacktrace_h; | |
| 283 if (st != NULL) { | |
| 284 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); | |
| 285 } else { | |
| 286 stacktrace_h = Handle(); | |
| 287 } | |
| 288 | |
| 289 args->push_oop(snapshot_thread); | |
| 290 args->push_int(thread_status); | |
| 291 args->push_oop(Handle(THREAD, snapshot->blocker_object())); | |
| 292 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); | |
| 293 args->push_long(snapshot->contended_enter_count()); | |
| 294 args->push_long(contended_time); | |
| 295 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); | |
| 296 args->push_long(waited_time); | |
| 297 args->push_oop(stacktrace_h); | |
| 298 } | |
| 299 | |
| 300 // Helper function to construct a ThreadInfo object | |
| 301 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { | |
| 302 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 303 instanceKlassHandle ik (THREAD, k); | |
| 304 | |
| 305 JavaValue result(T_VOID); | |
| 306 JavaCallArguments args(14); | |
| 307 | |
| 308 // First allocate a ThreadObj object and | |
| 309 // push the receiver as the first argument | |
| 310 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
| 311 args.push_oop(element); | |
| 312 | |
| 313 // initialize the arguments for the ThreadInfo constructor | |
| 314 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
| 315 | |
| 316 // Call ThreadInfo constructor with no locked monitors and synchronizers | |
| 317 JavaCalls::call_special(&result, | |
| 318 ik, | |
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319 vmSymbols::object_initializer_name(), |
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320 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), |
| 0 | 321 &args, |
| 322 CHECK_NULL); | |
| 323 | |
| 324 return (instanceOop) element(); | |
| 325 } | |
| 326 | |
| 327 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, | |
| 328 objArrayHandle monitors_array, | |
| 329 typeArrayHandle depths_array, | |
| 330 objArrayHandle synchronizers_array, | |
| 331 TRAPS) { | |
| 332 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 333 instanceKlassHandle ik (THREAD, k); | |
| 334 | |
| 335 JavaValue result(T_VOID); | |
| 336 JavaCallArguments args(17); | |
| 337 | |
| 338 // First allocate a ThreadObj object and | |
| 339 // push the receiver as the first argument | |
| 340 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
| 341 args.push_oop(element); | |
| 342 | |
| 343 // initialize the arguments for the ThreadInfo constructor | |
| 344 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
| 345 | |
| 346 // push the locked monitors and synchronizers in the arguments | |
| 347 args.push_oop(monitors_array); | |
| 348 args.push_oop(depths_array); | |
| 349 args.push_oop(synchronizers_array); | |
| 350 | |
| 351 // Call ThreadInfo constructor with locked monitors and synchronizers | |
| 352 JavaCalls::call_special(&result, | |
| 353 ik, | |
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354 vmSymbols::object_initializer_name(), |
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355 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), |
| 0 | 356 &args, |
| 357 CHECK_NULL); | |
| 358 | |
| 359 return (instanceOop) element(); | |
| 360 } | |
| 361 | |
| 362 // Helper functions | |
| 363 static JavaThread* find_java_thread_from_id(jlong thread_id) { | |
| 364 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); | |
| 365 | |
| 366 JavaThread* java_thread = NULL; | |
| 367 // Sequential search for now. Need to do better optimization later. | |
| 368 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 369 oop tobj = thread->threadObj(); | |
| 370 if (!thread->is_exiting() && | |
| 371 tobj != NULL && | |
| 372 thread_id == java_lang_Thread::thread_id(tobj)) { | |
| 373 java_thread = thread; | |
| 374 break; | |
| 375 } | |
| 376 } | |
| 377 return java_thread; | |
| 378 } | |
| 379 | |
| 380 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { | |
| 381 if (mgr == NULL) { | |
| 382 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 383 } | |
| 384 oop mgr_obj = JNIHandles::resolve(mgr); | |
| 385 instanceHandle h(THREAD, (instanceOop) mgr_obj); | |
| 386 | |
| 387 klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); | |
| 388 if (!h->is_a(k)) { | |
| 389 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 390 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", | |
| 391 NULL); | |
| 392 } | |
| 393 | |
| 394 MemoryManager* gc = MemoryService::get_memory_manager(h); | |
| 395 if (gc == NULL || !gc->is_gc_memory_manager()) { | |
| 396 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 397 "Invalid GC memory manager", | |
| 398 NULL); | |
| 399 } | |
| 400 return (GCMemoryManager*) gc; | |
| 401 } | |
| 402 | |
| 403 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { | |
| 404 if (obj == NULL) { | |
| 405 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 406 } | |
| 407 | |
| 408 oop pool_obj = JNIHandles::resolve(obj); | |
| 409 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
| 410 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
| 411 | |
| 412 return MemoryService::get_memory_pool(ph); | |
| 413 } | |
| 414 | |
| 415 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { | |
| 416 int num_threads = ids_ah->length(); | |
| 417 | |
| 418 // Validate input thread IDs | |
| 419 int i = 0; | |
| 420 for (i = 0; i < num_threads; i++) { | |
| 421 jlong tid = ids_ah->long_at(i); | |
| 422 if (tid <= 0) { | |
| 423 // throw exception if invalid thread id. | |
| 424 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 425 "Invalid thread ID entry"); | |
| 426 } | |
| 427 } | |
| 428 } | |
| 429 | |
| 430 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { | |
| 431 // check if the element of infoArray is of type ThreadInfo class | |
| 432 klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); | |
| 433 klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass(); | |
| 434 if (element_klass != threadinfo_klass) { | |
| 435 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 436 "infoArray element type is not ThreadInfo class"); | |
| 437 } | |
| 438 } | |
| 439 | |
| 440 | |
| 441 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { | |
| 442 if (obj == NULL) { | |
| 443 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 444 } | |
| 445 | |
| 446 oop mgr_obj = JNIHandles::resolve(obj); | |
| 447 assert(mgr_obj->is_instance(), "Should be an instanceOop"); | |
| 448 instanceHandle mh(THREAD, (instanceOop) mgr_obj); | |
| 449 | |
| 450 return MemoryService::get_memory_manager(mh); | |
| 451 } | |
| 452 | |
| 453 // Returns a version string and sets major and minor version if | |
| 454 // the input parameters are non-null. | |
| 455 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) | |
| 456 return JMM_VERSION; | |
| 457 JVM_END | |
| 458 | |
| 459 // Gets the list of VM monitoring and management optional supports | |
| 460 // Returns 0 if succeeded; otherwise returns non-zero. | |
| 461 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) | |
| 462 if (support == NULL) { | |
| 463 return -1; | |
| 464 } | |
| 465 Management::get_optional_support(support); | |
| 466 return 0; | |
| 467 JVM_END | |
| 468 | |
| 469 // Returns a java.lang.String object containing the input arguments to the VM. | |
| 470 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) | |
| 471 ResourceMark rm(THREAD); | |
| 472 | |
| 473 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
| 474 return NULL; | |
| 475 } | |
| 476 | |
| 477 char** vm_flags = Arguments::jvm_flags_array(); | |
| 478 char** vm_args = Arguments::jvm_args_array(); | |
| 479 int num_flags = Arguments::num_jvm_flags(); | |
| 480 int num_args = Arguments::num_jvm_args(); | |
| 481 | |
| 482 size_t length = 1; // null terminator | |
| 483 int i; | |
| 484 for (i = 0; i < num_flags; i++) { | |
| 485 length += strlen(vm_flags[i]); | |
| 486 } | |
| 487 for (i = 0; i < num_args; i++) { | |
| 488 length += strlen(vm_args[i]); | |
| 489 } | |
| 490 // add a space between each argument | |
| 491 length += num_flags + num_args - 1; | |
| 492 | |
| 493 // Return the list of input arguments passed to the VM | |
| 494 // and preserve the order that the VM processes. | |
| 495 char* args = NEW_RESOURCE_ARRAY(char, length); | |
| 496 args[0] = '\0'; | |
| 497 // concatenate all jvm_flags | |
| 498 if (num_flags > 0) { | |
| 499 strcat(args, vm_flags[0]); | |
| 500 for (i = 1; i < num_flags; i++) { | |
| 501 strcat(args, " "); | |
| 502 strcat(args, vm_flags[i]); | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 if (num_args > 0 && num_flags > 0) { | |
| 507 // append a space if args already contains one or more jvm_flags | |
| 508 strcat(args, " "); | |
| 509 } | |
| 510 | |
| 511 // concatenate all jvm_args | |
| 512 if (num_args > 0) { | |
| 513 strcat(args, vm_args[0]); | |
| 514 for (i = 1; i < num_args; i++) { | |
| 515 strcat(args, " "); | |
| 516 strcat(args, vm_args[i]); | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); | |
| 521 return JNIHandles::make_local(env, hargs()); | |
| 522 JVM_END | |
| 523 | |
| 524 // Returns an array of java.lang.String object containing the input arguments to the VM. | |
| 525 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) | |
| 526 ResourceMark rm(THREAD); | |
| 527 | |
| 528 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
| 529 return NULL; | |
| 530 } | |
| 531 | |
| 532 char** vm_flags = Arguments::jvm_flags_array(); | |
| 533 char** vm_args = Arguments::jvm_args_array(); | |
| 534 int num_flags = Arguments::num_jvm_flags(); | |
| 535 int num_args = Arguments::num_jvm_args(); | |
| 536 | |
| 1142 | 537 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); |
| 0 | 538 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); |
| 539 objArrayHandle result_h(THREAD, r); | |
| 540 | |
| 541 int index = 0; | |
| 542 for (int j = 0; j < num_flags; j++, index++) { | |
| 543 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); | |
| 544 result_h->obj_at_put(index, h()); | |
| 545 } | |
| 546 for (int i = 0; i < num_args; i++, index++) { | |
| 547 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); | |
| 548 result_h->obj_at_put(index, h()); | |
| 549 } | |
| 550 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
| 551 JVM_END | |
| 552 | |
| 553 // Returns an array of java/lang/management/MemoryPoolMXBean object | |
| 554 // one for each memory pool if obj == null; otherwise returns | |
| 555 // an array of memory pools for a given memory manager if | |
| 556 // it is a valid memory manager. | |
| 557 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) | |
| 558 ResourceMark rm(THREAD); | |
| 559 | |
| 560 int num_memory_pools; | |
| 561 MemoryManager* mgr = NULL; | |
| 562 if (obj == NULL) { | |
| 563 num_memory_pools = MemoryService::num_memory_pools(); | |
| 564 } else { | |
| 565 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); | |
| 566 if (mgr == NULL) { | |
| 567 return NULL; | |
| 568 } | |
| 569 num_memory_pools = mgr->num_memory_pools(); | |
| 570 } | |
| 571 | |
| 572 // Allocate the resulting MemoryPoolMXBean[] object | |
| 573 klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); | |
| 574 instanceKlassHandle ik (THREAD, k); | |
| 575 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); | |
| 576 objArrayHandle poolArray(THREAD, r); | |
| 577 | |
| 578 if (mgr == NULL) { | |
| 579 // Get all memory pools | |
| 580 for (int i = 0; i < num_memory_pools; i++) { | |
| 581 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
| 582 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
| 583 instanceHandle ph(THREAD, p); | |
| 584 poolArray->obj_at_put(i, ph()); | |
| 585 } | |
| 586 } else { | |
| 587 // Get memory pools managed by a given memory manager | |
| 588 for (int i = 0; i < num_memory_pools; i++) { | |
| 589 MemoryPool* pool = mgr->get_memory_pool(i); | |
| 590 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
| 591 instanceHandle ph(THREAD, p); | |
| 592 poolArray->obj_at_put(i, ph()); | |
| 593 } | |
| 594 } | |
| 595 return (jobjectArray) JNIHandles::make_local(env, poolArray()); | |
| 596 JVM_END | |
| 597 | |
| 598 // Returns an array of java/lang/management/MemoryManagerMXBean object | |
| 599 // one for each memory manager if obj == null; otherwise returns | |
| 600 // an array of memory managers for a given memory pool if | |
| 601 // it is a valid memory pool. | |
| 602 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) | |
| 603 ResourceMark rm(THREAD); | |
| 604 | |
| 605 int num_mgrs; | |
| 606 MemoryPool* pool = NULL; | |
| 607 if (obj == NULL) { | |
| 608 num_mgrs = MemoryService::num_memory_managers(); | |
| 609 } else { | |
| 610 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 611 if (pool == NULL) { | |
| 612 return NULL; | |
| 613 } | |
| 614 num_mgrs = pool->num_memory_managers(); | |
| 615 } | |
| 616 | |
| 617 // Allocate the resulting MemoryManagerMXBean[] object | |
| 618 klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); | |
| 619 instanceKlassHandle ik (THREAD, k); | |
| 620 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); | |
| 621 objArrayHandle mgrArray(THREAD, r); | |
| 622 | |
| 623 if (pool == NULL) { | |
| 624 // Get all memory managers | |
| 625 for (int i = 0; i < num_mgrs; i++) { | |
| 626 MemoryManager* mgr = MemoryService::get_memory_manager(i); | |
| 627 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
| 628 instanceHandle ph(THREAD, p); | |
| 629 mgrArray->obj_at_put(i, ph()); | |
| 630 } | |
| 631 } else { | |
| 632 // Get memory managers for a given memory pool | |
| 633 for (int i = 0; i < num_mgrs; i++) { | |
| 634 MemoryManager* mgr = pool->get_memory_manager(i); | |
| 635 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
| 636 instanceHandle ph(THREAD, p); | |
| 637 mgrArray->obj_at_put(i, ph()); | |
| 638 } | |
| 639 } | |
| 640 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); | |
| 641 JVM_END | |
| 642 | |
| 643 | |
| 644 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 645 // of a given memory pool. | |
| 646 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
| 647 ResourceMark rm(THREAD); | |
| 648 | |
| 649 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 650 if (pool != NULL) { | |
| 651 MemoryUsage usage = pool->get_memory_usage(); | |
| 652 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 653 return JNIHandles::make_local(env, h()); | |
| 654 } else { | |
| 655 return NULL; | |
| 656 } | |
| 657 JVM_END | |
| 658 | |
| 659 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 660 // of a given memory pool. | |
| 661 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
| 662 ResourceMark rm(THREAD); | |
| 663 | |
| 664 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 665 if (pool != NULL) { | |
| 666 MemoryUsage usage = pool->get_peak_memory_usage(); | |
| 667 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 668 return JNIHandles::make_local(env, h()); | |
| 669 } else { | |
| 670 return NULL; | |
| 671 } | |
| 672 JVM_END | |
| 673 | |
| 674 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 675 // of a given memory pool after most recent GC. | |
| 676 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) | |
| 677 ResourceMark rm(THREAD); | |
| 678 | |
| 679 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 680 if (pool != NULL && pool->is_collected_pool()) { | |
| 681 MemoryUsage usage = pool->get_last_collection_usage(); | |
| 682 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 683 return JNIHandles::make_local(env, h()); | |
| 684 } else { | |
| 685 return NULL; | |
| 686 } | |
| 687 JVM_END | |
| 688 | |
| 689 // Sets the memory pool sensor for a threshold type | |
| 690 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) | |
| 691 if (obj == NULL || sensorObj == NULL) { | |
| 692 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 693 } | |
| 694 | |
| 695 klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK); | |
| 696 oop s = JNIHandles::resolve(sensorObj); | |
| 697 assert(s->is_instance(), "Sensor should be an instanceOop"); | |
| 698 instanceHandle sensor_h(THREAD, (instanceOop) s); | |
| 699 if (!sensor_h->is_a(sensor_klass)) { | |
| 700 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 701 "Sensor is not an instance of sun.management.Sensor class"); | |
| 702 } | |
| 703 | |
| 704 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); | |
| 705 assert(mpool != NULL, "MemoryPool should exist"); | |
| 706 | |
| 707 switch (type) { | |
| 708 case JMM_USAGE_THRESHOLD_HIGH: | |
| 709 case JMM_USAGE_THRESHOLD_LOW: | |
| 710 // have only one sensor for threshold high and low | |
| 711 mpool->set_usage_sensor_obj(sensor_h); | |
| 712 break; | |
| 713 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
| 714 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
| 715 // have only one sensor for threshold high and low | |
| 716 mpool->set_gc_usage_sensor_obj(sensor_h); | |
| 717 break; | |
| 718 default: | |
| 719 assert(false, "Unrecognized type"); | |
| 720 } | |
| 721 | |
| 722 JVM_END | |
| 723 | |
| 724 | |
| 725 // Sets the threshold of a given memory pool. | |
| 726 // Returns the previous threshold. | |
| 727 // | |
| 728 // Input parameters: | |
| 729 // pool - the MemoryPoolMXBean object | |
| 730 // type - threshold type | |
| 731 // threshold - the new threshold (must not be negative) | |
| 732 // | |
| 733 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) | |
| 734 if (threshold < 0) { | |
| 735 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 736 "Invalid threshold value", | |
| 737 -1); | |
| 738 } | |
| 739 | |
|
489
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740 if ((size_t)threshold > max_uintx) { |
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741 stringStream st; |
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742 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); |
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743 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); |
| 0 | 744 } |
| 745 | |
| 746 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); | |
| 747 assert(pool != NULL, "MemoryPool should exist"); | |
| 748 | |
| 749 jlong prev = 0; | |
| 750 switch (type) { | |
| 751 case JMM_USAGE_THRESHOLD_HIGH: | |
| 752 if (!pool->usage_threshold()->is_high_threshold_supported()) { | |
| 753 return -1; | |
| 754 } | |
| 755 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); | |
| 756 break; | |
| 757 | |
| 758 case JMM_USAGE_THRESHOLD_LOW: | |
| 759 if (!pool->usage_threshold()->is_low_threshold_supported()) { | |
| 760 return -1; | |
| 761 } | |
| 762 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); | |
| 763 break; | |
| 764 | |
| 765 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
| 766 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { | |
| 767 return -1; | |
| 768 } | |
| 769 // return and the new threshold is effective for the next GC | |
| 770 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); | |
| 771 | |
| 772 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
| 773 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { | |
| 774 return -1; | |
| 775 } | |
| 776 // return and the new threshold is effective for the next GC | |
| 777 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); | |
| 778 | |
| 779 default: | |
| 780 assert(false, "Unrecognized type"); | |
| 781 return -1; | |
| 782 } | |
| 783 | |
| 784 // When the threshold is changed, reevaluate if the low memory | |
| 785 // detection is enabled. | |
| 786 if (prev != threshold) { | |
| 787 LowMemoryDetector::recompute_enabled_for_collected_pools(); | |
| 788 LowMemoryDetector::detect_low_memory(pool); | |
| 789 } | |
| 790 return prev; | |
| 791 JVM_END | |
| 792 | |
|
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793 // Gets an array containing the amount of memory allocated on the Java |
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794 // heap for a set of threads (in bytes). Each element of the array is |
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795 // the amount of memory allocated for the thread ID specified in the |
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796 // corresponding entry in the given array of thread IDs; or -1 if the |
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797 // thread does not exist or has terminated. |
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798 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, |
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799 jlongArray sizeArray)) |
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800 // Check if threads is null |
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801 if (ids == NULL || sizeArray == NULL) { |
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802 THROW(vmSymbols::java_lang_NullPointerException()); |
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803 } |
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804 |
|
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805 ResourceMark rm(THREAD); |
|
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806 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
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807 typeArrayHandle ids_ah(THREAD, ta); |
|
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808 |
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809 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); |
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810 typeArrayHandle sizeArray_h(THREAD, sa); |
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811 |
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812 // validate the thread id array |
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813 validate_thread_id_array(ids_ah, CHECK); |
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814 |
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815 // sizeArray must be of the same length as the given array of thread IDs |
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816 int num_threads = ids_ah->length(); |
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817 if (num_threads != sizeArray_h->length()) { |
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818 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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819 "The length of the given long array does not match the length of " |
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820 "the given array of thread IDs"); |
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821 } |
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822 |
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823 MutexLockerEx ml(Threads_lock); |
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824 for (int i = 0; i < num_threads; i++) { |
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825 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); |
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826 if (java_thread != NULL) { |
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827 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); |
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828 } |
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829 } |
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830 JVM_END |
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831 |
| 0 | 832 // Returns a java/lang/management/MemoryUsage object representing |
| 833 // the memory usage for the heap or non-heap memory. | |
| 834 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) | |
| 835 ResourceMark rm(THREAD); | |
| 836 | |
| 837 // Calculate the memory usage | |
| 838 size_t total_init = 0; | |
| 839 size_t total_used = 0; | |
| 840 size_t total_committed = 0; | |
| 841 size_t total_max = 0; | |
| 842 bool has_undefined_init_size = false; | |
| 843 bool has_undefined_max_size = false; | |
| 844 | |
| 845 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { | |
| 846 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
| 847 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { | |
| 848 MemoryUsage u = pool->get_memory_usage(); | |
| 849 total_used += u.used(); | |
| 850 total_committed += u.committed(); | |
| 851 | |
| 852 // if any one of the memory pool has undefined init_size or max_size, | |
| 853 // set it to -1 | |
| 854 if (u.init_size() == (size_t)-1) { | |
| 855 has_undefined_init_size = true; | |
| 856 } | |
| 857 if (!has_undefined_init_size) { | |
| 858 total_init += u.init_size(); | |
| 859 } | |
| 860 | |
| 861 if (u.max_size() == (size_t)-1) { | |
| 862 has_undefined_max_size = true; | |
| 863 } | |
| 864 if (!has_undefined_max_size) { | |
| 865 total_max += u.max_size(); | |
| 866 } | |
| 867 } | |
| 868 } | |
| 869 | |
|
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870 // In our current implementation, we make sure that all non-heap |
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871 // pools have defined init and max sizes. Heap pools do not matter, |
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872 // as we never use total_init and total_max for them. |
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873 assert(heap || !has_undefined_init_size, "Undefined init size"); |
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874 assert(heap || !has_undefined_max_size, "Undefined max size"); |
| 0 | 875 |
| 1064 | 876 MemoryUsage usage((heap ? InitialHeapSize : total_init), |
| 0 | 877 total_used, |
| 878 total_committed, | |
| 879 (heap ? Universe::heap()->max_capacity() : total_max)); | |
| 880 | |
| 881 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 882 return JNIHandles::make_local(env, obj()); | |
| 883 JVM_END | |
| 884 | |
| 885 // Returns the boolean value of a given attribute. | |
| 886 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) | |
| 887 switch (att) { | |
| 888 case JMM_VERBOSE_GC: | |
| 889 return MemoryService::get_verbose(); | |
| 890 case JMM_VERBOSE_CLASS: | |
| 891 return ClassLoadingService::get_verbose(); | |
| 892 case JMM_THREAD_CONTENTION_MONITORING: | |
| 893 return ThreadService::is_thread_monitoring_contention(); | |
| 894 case JMM_THREAD_CPU_TIME: | |
| 895 return ThreadService::is_thread_cpu_time_enabled(); | |
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896 case JMM_THREAD_ALLOCATED_MEMORY: |
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897 return ThreadService::is_thread_allocated_memory_enabled(); |
| 0 | 898 default: |
| 899 assert(0, "Unrecognized attribute"); | |
| 900 return false; | |
| 901 } | |
| 902 JVM_END | |
| 903 | |
| 904 // Sets the given boolean attribute and returns the previous value. | |
| 905 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) | |
| 906 switch (att) { | |
| 907 case JMM_VERBOSE_GC: | |
| 908 return MemoryService::set_verbose(flag != 0); | |
| 909 case JMM_VERBOSE_CLASS: | |
| 910 return ClassLoadingService::set_verbose(flag != 0); | |
| 911 case JMM_THREAD_CONTENTION_MONITORING: | |
| 912 return ThreadService::set_thread_monitoring_contention(flag != 0); | |
| 913 case JMM_THREAD_CPU_TIME: | |
| 914 return ThreadService::set_thread_cpu_time_enabled(flag != 0); | |
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915 case JMM_THREAD_ALLOCATED_MEMORY: |
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916 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); |
| 0 | 917 default: |
| 918 assert(0, "Unrecognized attribute"); | |
| 919 return false; | |
| 920 } | |
| 921 JVM_END | |
| 922 | |
| 923 | |
| 924 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { | |
| 925 switch (att) { | |
| 926 case JMM_GC_TIME_MS: | |
| 927 return mgr->gc_time_ms(); | |
| 928 | |
| 929 case JMM_GC_COUNT: | |
| 930 return mgr->gc_count(); | |
| 931 | |
| 932 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: | |
| 933 // current implementation only has 1 ext attribute | |
| 934 return 1; | |
| 935 | |
| 936 default: | |
| 937 assert(0, "Unrecognized GC attribute"); | |
| 938 return -1; | |
| 939 } | |
| 940 } | |
| 941 | |
| 942 class VmThreadCountClosure: public ThreadClosure { | |
| 943 private: | |
| 944 int _count; | |
| 945 public: | |
| 946 VmThreadCountClosure() : _count(0) {}; | |
| 947 void do_thread(Thread* thread); | |
| 948 int count() { return _count; } | |
| 949 }; | |
| 950 | |
| 951 void VmThreadCountClosure::do_thread(Thread* thread) { | |
| 952 // exclude externally visible JavaThreads | |
| 953 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
| 954 return; | |
| 955 } | |
| 956 | |
| 957 _count++; | |
| 958 } | |
| 959 | |
| 960 static jint get_vm_thread_count() { | |
| 961 VmThreadCountClosure vmtcc; | |
| 962 { | |
| 963 MutexLockerEx ml(Threads_lock); | |
| 964 Threads::threads_do(&vmtcc); | |
| 965 } | |
| 966 | |
| 967 return vmtcc.count(); | |
| 968 } | |
| 969 | |
| 970 static jint get_num_flags() { | |
| 971 // last flag entry is always NULL, so subtract 1 | |
| 972 int nFlags = (int) Flag::numFlags - 1; | |
| 973 int count = 0; | |
| 974 for (int i = 0; i < nFlags; i++) { | |
| 975 Flag* flag = &Flag::flags[i]; | |
| 350 | 976 // Exclude the locked (diagnostic, experimental) flags |
| 0 | 977 if (flag->is_unlocked() || flag->is_unlocker()) { |
| 978 count++; | |
| 979 } | |
| 980 } | |
| 981 return count; | |
| 982 } | |
| 983 | |
| 984 static jlong get_long_attribute(jmmLongAttribute att) { | |
| 985 switch (att) { | |
| 986 case JMM_CLASS_LOADED_COUNT: | |
| 987 return ClassLoadingService::loaded_class_count(); | |
| 988 | |
| 989 case JMM_CLASS_UNLOADED_COUNT: | |
| 990 return ClassLoadingService::unloaded_class_count(); | |
| 991 | |
| 992 case JMM_THREAD_TOTAL_COUNT: | |
| 993 return ThreadService::get_total_thread_count(); | |
| 994 | |
| 995 case JMM_THREAD_LIVE_COUNT: | |
| 996 return ThreadService::get_live_thread_count(); | |
| 997 | |
| 998 case JMM_THREAD_PEAK_COUNT: | |
| 999 return ThreadService::get_peak_thread_count(); | |
| 1000 | |
| 1001 case JMM_THREAD_DAEMON_COUNT: | |
| 1002 return ThreadService::get_daemon_thread_count(); | |
| 1003 | |
| 1004 case JMM_JVM_INIT_DONE_TIME_MS: | |
| 1005 return Management::vm_init_done_time(); | |
| 1006 | |
| 1007 case JMM_COMPILE_TOTAL_TIME_MS: | |
| 1008 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); | |
| 1009 | |
| 1010 case JMM_OS_PROCESS_ID: | |
| 1011 return os::current_process_id(); | |
| 1012 | |
| 1013 // Hotspot-specific counters | |
| 1014 case JMM_CLASS_LOADED_BYTES: | |
| 1015 return ClassLoadingService::loaded_class_bytes(); | |
| 1016 | |
| 1017 case JMM_CLASS_UNLOADED_BYTES: | |
| 1018 return ClassLoadingService::unloaded_class_bytes(); | |
| 1019 | |
| 1020 case JMM_SHARED_CLASS_LOADED_COUNT: | |
| 1021 return ClassLoadingService::loaded_shared_class_count(); | |
| 1022 | |
| 1023 case JMM_SHARED_CLASS_UNLOADED_COUNT: | |
| 1024 return ClassLoadingService::unloaded_shared_class_count(); | |
| 1025 | |
| 1026 | |
| 1027 case JMM_SHARED_CLASS_LOADED_BYTES: | |
| 1028 return ClassLoadingService::loaded_shared_class_bytes(); | |
| 1029 | |
| 1030 case JMM_SHARED_CLASS_UNLOADED_BYTES: | |
| 1031 return ClassLoadingService::unloaded_shared_class_bytes(); | |
| 1032 | |
| 1033 case JMM_TOTAL_CLASSLOAD_TIME_MS: | |
| 1034 return ClassLoader::classloader_time_ms(); | |
| 1035 | |
| 1036 case JMM_VM_GLOBAL_COUNT: | |
| 1037 return get_num_flags(); | |
| 1038 | |
| 1039 case JMM_SAFEPOINT_COUNT: | |
| 1040 return RuntimeService::safepoint_count(); | |
| 1041 | |
| 1042 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: | |
| 1043 return RuntimeService::safepoint_sync_time_ms(); | |
| 1044 | |
| 1045 case JMM_TOTAL_STOPPED_TIME_MS: | |
| 1046 return RuntimeService::safepoint_time_ms(); | |
| 1047 | |
| 1048 case JMM_TOTAL_APP_TIME_MS: | |
| 1049 return RuntimeService::application_time_ms(); | |
| 1050 | |
| 1051 case JMM_VM_THREAD_COUNT: | |
| 1052 return get_vm_thread_count(); | |
| 1053 | |
| 1054 case JMM_CLASS_INIT_TOTAL_COUNT: | |
| 1055 return ClassLoader::class_init_count(); | |
| 1056 | |
| 1057 case JMM_CLASS_INIT_TOTAL_TIME_MS: | |
| 1058 return ClassLoader::class_init_time_ms(); | |
| 1059 | |
| 1060 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: | |
| 1061 return ClassLoader::class_verify_time_ms(); | |
| 1062 | |
| 1063 case JMM_METHOD_DATA_SIZE_BYTES: | |
| 1064 return ClassLoadingService::class_method_data_size(); | |
| 1065 | |
| 1066 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: | |
| 1067 return os::physical_memory(); | |
| 1068 | |
| 1069 default: | |
| 1070 return -1; | |
| 1071 } | |
| 1072 } | |
| 1073 | |
| 1074 | |
| 1075 // Returns the long value of a given attribute. | |
| 1076 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) | |
| 1077 if (obj == NULL) { | |
| 1078 return get_long_attribute(att); | |
| 1079 } else { | |
| 1080 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); | |
| 1081 if (mgr != NULL) { | |
| 1082 return get_gc_attribute(mgr, att); | |
| 1083 } | |
| 1084 } | |
| 1085 return -1; | |
| 1086 JVM_END | |
| 1087 | |
| 1088 // Gets the value of all attributes specified in the given array | |
| 1089 // and sets the value in the result array. | |
| 1090 // Returns the number of attributes found. | |
| 1091 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, | |
| 1092 jobject obj, | |
| 1093 jmmLongAttribute* atts, | |
| 1094 jint count, | |
| 1095 jlong* result)) | |
| 1096 | |
| 1097 int num_atts = 0; | |
| 1098 if (obj == NULL) { | |
| 1099 for (int i = 0; i < count; i++) { | |
| 1100 result[i] = get_long_attribute(atts[i]); | |
| 1101 if (result[i] != -1) { | |
| 1102 num_atts++; | |
| 1103 } | |
| 1104 } | |
| 1105 } else { | |
| 1106 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); | |
| 1107 for (int i = 0; i < count; i++) { | |
| 1108 result[i] = get_gc_attribute(mgr, atts[i]); | |
| 1109 if (result[i] != -1) { | |
| 1110 num_atts++; | |
| 1111 } | |
| 1112 } | |
| 1113 } | |
| 1114 return num_atts; | |
| 1115 JVM_END | |
| 1116 | |
| 1117 // Helper function to do thread dump for a specific list of threads | |
| 1118 static void do_thread_dump(ThreadDumpResult* dump_result, | |
| 1119 typeArrayHandle ids_ah, // array of thread ID (long[]) | |
| 1120 int num_threads, | |
| 1121 int max_depth, | |
| 1122 bool with_locked_monitors, | |
| 1123 bool with_locked_synchronizers, | |
| 1124 TRAPS) { | |
| 1125 | |
| 1126 // First get an array of threadObj handles. | |
| 1127 // A JavaThread may terminate before we get the stack trace. | |
| 1128 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
| 1129 { | |
| 1130 MutexLockerEx ml(Threads_lock); | |
| 1131 for (int i = 0; i < num_threads; i++) { | |
| 1132 jlong tid = ids_ah->long_at(i); | |
| 1133 JavaThread* jt = find_java_thread_from_id(tid); | |
| 1134 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); | |
| 1135 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); | |
| 1136 thread_handle_array->append(threadObj_h); | |
| 1137 } | |
| 1138 } | |
| 1139 | |
| 1140 // Obtain thread dumps and thread snapshot information | |
| 1141 VM_ThreadDump op(dump_result, | |
| 1142 thread_handle_array, | |
| 1143 num_threads, | |
| 1144 max_depth, /* stack depth */ | |
| 1145 with_locked_monitors, | |
| 1146 with_locked_synchronizers); | |
| 1147 VMThread::execute(&op); | |
| 1148 } | |
| 1149 | |
| 1150 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo | |
| 1151 // for the thread ID specified in the corresponding entry in | |
| 1152 // the given array of thread IDs; or NULL if the thread does not exist | |
| 1153 // or has terminated. | |
| 1154 // | |
| 1155 // Input parameters: | |
| 1156 // ids - array of thread IDs | |
| 1157 // maxDepth - the maximum depth of stack traces to be dumped: | |
| 1158 // maxDepth == -1 requests to dump entire stack trace. | |
| 1159 // maxDepth == 0 requests no stack trace. | |
| 1160 // infoArray - array of ThreadInfo objects | |
| 1161 // | |
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1162 // QQQ - Why does this method return a value instead of void? |
| 0 | 1163 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) |
| 1164 // Check if threads is null | |
| 1165 if (ids == NULL || infoArray == NULL) { | |
| 1166 THROW_(vmSymbols::java_lang_NullPointerException(), -1); | |
| 1167 } | |
| 1168 | |
| 1169 if (maxDepth < -1) { | |
| 1170 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1171 "Invalid maxDepth", -1); | |
| 1172 } | |
| 1173 | |
| 1174 ResourceMark rm(THREAD); | |
| 1175 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); | |
| 1176 typeArrayHandle ids_ah(THREAD, ta); | |
| 1177 | |
| 1178 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); | |
| 1179 objArrayOop oa = objArrayOop(infoArray_obj); | |
| 1180 objArrayHandle infoArray_h(THREAD, oa); | |
| 1181 | |
| 1182 // validate the thread id array | |
| 1183 validate_thread_id_array(ids_ah, CHECK_0); | |
| 1184 | |
| 1185 // validate the ThreadInfo[] parameters | |
| 1186 validate_thread_info_array(infoArray_h, CHECK_0); | |
| 1187 | |
| 1188 // infoArray must be of the same length as the given array of thread IDs | |
| 1189 int num_threads = ids_ah->length(); | |
| 1190 if (num_threads != infoArray_h->length()) { | |
| 1191 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1192 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); | |
| 1193 } | |
| 1194 | |
| 1195 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 1196 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
| 1197 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); | |
| 1198 } | |
| 1199 | |
| 1200 // Must use ThreadDumpResult to store the ThreadSnapshot. | |
| 1201 // GC may occur after the thread snapshots are taken but before | |
| 1202 // this function returns. The threadObj and other oops kept | |
| 1203 // in the ThreadSnapshot are marked and adjusted during GC. | |
| 1204 ThreadDumpResult dump_result(num_threads); | |
| 1205 | |
| 1206 if (maxDepth == 0) { | |
| 1207 // no stack trace dumped - do not need to stop the world | |
| 1208 { | |
| 1209 MutexLockerEx ml(Threads_lock); | |
| 1210 for (int i = 0; i < num_threads; i++) { | |
| 1211 jlong tid = ids_ah->long_at(i); | |
| 1212 JavaThread* jt = find_java_thread_from_id(tid); | |
| 1213 ThreadSnapshot* ts; | |
| 1214 if (jt == NULL) { | |
| 1215 // if the thread does not exist or now it is terminated, | |
| 1216 // create dummy snapshot | |
| 1217 ts = new ThreadSnapshot(); | |
| 1218 } else { | |
| 1219 ts = new ThreadSnapshot(jt); | |
| 1220 } | |
| 1221 dump_result.add_thread_snapshot(ts); | |
| 1222 } | |
| 1223 } | |
| 1224 } else { | |
| 1225 // obtain thread dump with the specific list of threads with stack trace | |
| 1226 do_thread_dump(&dump_result, | |
| 1227 ids_ah, | |
| 1228 num_threads, | |
| 1229 maxDepth, | |
| 1230 false, /* no locked monitor */ | |
| 1231 false, /* no locked synchronizers */ | |
| 1232 CHECK_0); | |
| 1233 } | |
| 1234 | |
| 1235 int num_snapshots = dump_result.num_snapshots(); | |
| 1236 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); | |
| 1237 int index = 0; | |
| 1238 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { | |
| 1239 // For each thread, create an java/lang/management/ThreadInfo object | |
| 1240 // and fill with the thread information | |
| 1241 | |
| 1242 if (ts->threadObj() == NULL) { | |
| 1243 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
| 1244 infoArray_h->obj_at_put(index, NULL); | |
| 1245 continue; | |
| 1246 } | |
| 1247 | |
| 1248 // Create java.lang.management.ThreadInfo object | |
| 1249 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); | |
| 1250 infoArray_h->obj_at_put(index, info_obj); | |
| 1251 } | |
| 1252 return 0; | |
| 1253 JVM_END | |
| 1254 | |
| 1255 // Dump thread info for the specified threads. | |
| 1256 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo | |
| 1257 // for the thread ID specified in the corresponding entry in | |
| 1258 // the given array of thread IDs; or NULL if the thread does not exist | |
| 1259 // or has terminated. | |
| 1260 // | |
| 1261 // Input parameter: | |
| 1262 // ids - array of thread IDs; NULL indicates all live threads | |
| 1263 // locked_monitors - if true, dump locked object monitors | |
| 1264 // locked_synchronizers - if true, dump locked JSR-166 synchronizers | |
| 1265 // | |
| 1266 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) | |
| 1267 ResourceMark rm(THREAD); | |
| 1268 | |
| 1269 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 1270 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
| 1271 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); | |
| 1272 } | |
| 1273 | |
| 1274 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); | |
| 1275 int num_threads = (ta != NULL ? ta->length() : 0); | |
| 1276 typeArrayHandle ids_ah(THREAD, ta); | |
| 1277 | |
| 1278 ThreadDumpResult dump_result(num_threads); // can safepoint | |
| 1279 | |
| 1280 if (ids_ah() != NULL) { | |
| 1281 | |
| 1282 // validate the thread id array | |
| 1283 validate_thread_id_array(ids_ah, CHECK_NULL); | |
| 1284 | |
| 1285 // obtain thread dump of a specific list of threads | |
| 1286 do_thread_dump(&dump_result, | |
| 1287 ids_ah, | |
| 1288 num_threads, | |
| 1289 -1, /* entire stack */ | |
| 1290 (locked_monitors ? true : false), /* with locked monitors */ | |
| 1291 (locked_synchronizers ? true : false), /* with locked synchronizers */ | |
| 1292 CHECK_NULL); | |
| 1293 } else { | |
| 1294 // obtain thread dump of all threads | |
| 1295 VM_ThreadDump op(&dump_result, | |
| 1296 -1, /* entire stack */ | |
| 1297 (locked_monitors ? true : false), /* with locked monitors */ | |
| 1298 (locked_synchronizers ? true : false) /* with locked synchronizers */); | |
| 1299 VMThread::execute(&op); | |
| 1300 } | |
| 1301 | |
| 1302 int num_snapshots = dump_result.num_snapshots(); | |
| 1303 | |
| 1304 // create the result ThreadInfo[] object | |
| 1305 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 1306 instanceKlassHandle ik (THREAD, k); | |
| 1307 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); | |
| 1308 objArrayHandle result_h(THREAD, r); | |
| 1309 | |
| 1310 int index = 0; | |
| 1311 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { | |
| 1312 if (ts->threadObj() == NULL) { | |
| 1313 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
| 1314 result_h->obj_at_put(index, NULL); | |
| 1315 continue; | |
| 1316 } | |
| 1317 | |
| 1318 ThreadStackTrace* stacktrace = ts->get_stack_trace(); | |
| 1319 assert(stacktrace != NULL, "Must have a stack trace dumped"); | |
| 1320 | |
| 1321 // Create Object[] filled with locked monitors | |
| 1322 // Create int[] filled with the stack depth where a monitor was locked | |
| 1323 int num_frames = stacktrace->get_stack_depth(); | |
| 1324 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); | |
| 1325 | |
| 1326 // Count the total number of locked monitors | |
| 1327 for (int i = 0; i < num_frames; i++) { | |
| 1328 StackFrameInfo* frame = stacktrace->stack_frame_at(i); | |
| 1329 num_locked_monitors += frame->num_locked_monitors(); | |
| 1330 } | |
| 1331 | |
| 1332 objArrayHandle monitors_array; | |
| 1333 typeArrayHandle depths_array; | |
| 1334 objArrayHandle synchronizers_array; | |
| 1335 | |
| 1336 if (locked_monitors) { | |
| 1337 // Constructs Object[] and int[] to contain the object monitor and the stack depth | |
| 1338 // where the thread locked it | |
|
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1339 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); |
| 0 | 1340 objArrayHandle mh(THREAD, array); |
| 1341 monitors_array = mh; | |
| 1342 | |
| 1343 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); | |
| 1344 typeArrayHandle dh(THREAD, tarray); | |
| 1345 depths_array = dh; | |
| 1346 | |
| 1347 int count = 0; | |
| 1348 int j = 0; | |
| 1349 for (int depth = 0; depth < num_frames; depth++) { | |
| 1350 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); | |
| 1351 int len = frame->num_locked_monitors(); | |
| 1352 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); | |
| 1353 for (j = 0; j < len; j++) { | |
| 1354 oop monitor = locked_monitors->at(j); | |
| 1355 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); | |
| 1356 monitors_array->obj_at_put(count, monitor); | |
| 1357 depths_array->int_at_put(count, depth); | |
| 1358 count++; | |
| 1359 } | |
| 1360 } | |
| 1361 | |
| 1362 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); | |
| 1363 for (j = 0; j < jni_locked_monitors->length(); j++) { | |
| 1364 oop object = jni_locked_monitors->at(j); | |
| 1365 assert(object != NULL && object->is_instance(), "must be a Java object"); | |
| 1366 monitors_array->obj_at_put(count, object); | |
| 1367 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info | |
| 1368 depths_array->int_at_put(count, -1); | |
| 1369 count++; | |
| 1370 } | |
| 1371 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); | |
| 1372 } | |
| 1373 | |
| 1374 if (locked_synchronizers) { | |
| 1375 // Create Object[] filled with locked JSR-166 synchronizers | |
| 1376 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); | |
| 1377 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); | |
| 1378 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); | |
| 1379 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); | |
| 1380 | |
|
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1381 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); |
| 0 | 1382 objArrayHandle sh(THREAD, array); |
| 1383 synchronizers_array = sh; | |
| 1384 | |
| 1385 for (int k = 0; k < num_locked_synchronizers; k++) { | |
| 1386 synchronizers_array->obj_at_put(k, locks->at(k)); | |
| 1387 } | |
| 1388 } | |
| 1389 | |
| 1390 // Create java.lang.management.ThreadInfo object | |
| 1391 instanceOop info_obj = Management::create_thread_info_instance(ts, | |
| 1392 monitors_array, | |
| 1393 depths_array, | |
| 1394 synchronizers_array, | |
| 1395 CHECK_NULL); | |
| 1396 result_h->obj_at_put(index, info_obj); | |
| 1397 } | |
| 1398 | |
| 1399 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
| 1400 JVM_END | |
| 1401 | |
| 1402 // Returns an array of Class objects. | |
| 1403 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) | |
| 1404 ResourceMark rm(THREAD); | |
| 1405 | |
| 1406 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter | |
| 1407 | |
| 1408 int num_classes = lce.num_loaded_classes(); | |
| 1142 | 1409 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); |
| 0 | 1410 objArrayHandle classes_ah(THREAD, r); |
| 1411 | |
| 1412 for (int i = 0; i < num_classes; i++) { | |
| 1413 KlassHandle kh = lce.get_klass(i); | |
| 1414 oop mirror = Klass::cast(kh())->java_mirror(); | |
| 1415 classes_ah->obj_at_put(i, mirror); | |
| 1416 } | |
| 1417 | |
| 1418 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); | |
| 1419 JVM_END | |
| 1420 | |
| 1421 // Reset statistic. Return true if the requested statistic is reset. | |
| 1422 // Otherwise, return false. | |
| 1423 // | |
| 1424 // Input parameters: | |
| 1425 // obj - specify which instance the statistic associated with to be reset | |
| 1426 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. | |
| 1427 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. | |
| 1428 // type - the type of statistic to be reset | |
| 1429 // | |
| 1430 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) | |
| 1431 ResourceMark rm(THREAD); | |
| 1432 | |
| 1433 switch (type) { | |
| 1434 case JMM_STAT_PEAK_THREAD_COUNT: | |
| 1435 ThreadService::reset_peak_thread_count(); | |
| 1436 return true; | |
| 1437 | |
| 1438 case JMM_STAT_THREAD_CONTENTION_COUNT: | |
| 1439 case JMM_STAT_THREAD_CONTENTION_TIME: { | |
| 1440 jlong tid = obj.j; | |
| 1441 if (tid < 0) { | |
| 1442 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); | |
| 1443 } | |
| 1444 | |
| 1445 // Look for the JavaThread of this given tid | |
| 1446 MutexLockerEx ml(Threads_lock); | |
| 1447 if (tid == 0) { | |
| 1448 // reset contention statistics for all threads if tid == 0 | |
| 1449 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { | |
| 1450 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
| 1451 ThreadService::reset_contention_count_stat(java_thread); | |
| 1452 } else { | |
| 1453 ThreadService::reset_contention_time_stat(java_thread); | |
| 1454 } | |
| 1455 } | |
| 1456 } else { | |
| 1457 // reset contention statistics for a given thread | |
| 1458 JavaThread* java_thread = find_java_thread_from_id(tid); | |
| 1459 if (java_thread == NULL) { | |
| 1460 return false; | |
| 1461 } | |
| 1462 | |
| 1463 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
| 1464 ThreadService::reset_contention_count_stat(java_thread); | |
| 1465 } else { | |
| 1466 ThreadService::reset_contention_time_stat(java_thread); | |
| 1467 } | |
| 1468 } | |
| 1469 return true; | |
| 1470 break; | |
| 1471 } | |
| 1472 case JMM_STAT_PEAK_POOL_USAGE: { | |
| 1473 jobject o = obj.l; | |
| 1474 if (o == NULL) { | |
| 1475 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1476 } | |
| 1477 | |
| 1478 oop pool_obj = JNIHandles::resolve(o); | |
| 1479 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
| 1480 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
| 1481 | |
| 1482 MemoryPool* pool = MemoryService::get_memory_pool(ph); | |
| 1483 if (pool != NULL) { | |
| 1484 pool->reset_peak_memory_usage(); | |
| 1485 return true; | |
| 1486 } | |
| 1487 break; | |
| 1488 } | |
| 1489 case JMM_STAT_GC_STAT: { | |
| 1490 jobject o = obj.l; | |
| 1491 if (o == NULL) { | |
| 1492 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1493 } | |
| 1494 | |
| 1495 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); | |
| 1496 if (mgr != NULL) { | |
| 1497 mgr->reset_gc_stat(); | |
| 1498 return true; | |
| 1499 } | |
| 1500 break; | |
| 1501 } | |
| 1502 default: | |
| 1503 assert(0, "Unknown Statistic Type"); | |
| 1504 } | |
| 1505 return false; | |
| 1506 JVM_END | |
| 1507 | |
| 1508 // Returns the fast estimate of CPU time consumed by | |
| 1509 // a given thread (in nanoseconds). | |
| 1510 // If thread_id == 0, return CPU time for the current thread. | |
| 1511 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) | |
| 1512 if (!os::is_thread_cpu_time_supported()) { | |
| 1513 return -1; | |
| 1514 } | |
| 1515 | |
| 1516 if (thread_id < 0) { | |
| 1517 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1518 "Invalid thread ID", -1); | |
| 1519 } | |
| 1520 | |
| 1521 JavaThread* java_thread = NULL; | |
| 1522 if (thread_id == 0) { | |
| 1523 // current thread | |
| 1524 return os::current_thread_cpu_time(); | |
| 1525 } else { | |
| 1526 MutexLockerEx ml(Threads_lock); | |
| 1527 java_thread = find_java_thread_from_id(thread_id); | |
| 1528 if (java_thread != NULL) { | |
| 1529 return os::thread_cpu_time((Thread*) java_thread); | |
| 1530 } | |
| 1531 } | |
| 1532 return -1; | |
| 1533 JVM_END | |
| 1534 | |
| 1535 // Returns the CPU time consumed by a given thread (in nanoseconds). | |
| 1536 // If thread_id == 0, CPU time for the current thread is returned. | |
| 1537 // If user_sys_cpu_time = true, user level and system CPU time of | |
| 1538 // a given thread is returned; otherwise, only user level CPU time | |
| 1539 // is returned. | |
| 1540 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) | |
| 1541 if (!os::is_thread_cpu_time_supported()) { | |
| 1542 return -1; | |
| 1543 } | |
| 1544 | |
| 1545 if (thread_id < 0) { | |
| 1546 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1547 "Invalid thread ID", -1); | |
| 1548 } | |
| 1549 | |
| 1550 JavaThread* java_thread = NULL; | |
| 1551 if (thread_id == 0) { | |
| 1552 // current thread | |
| 1553 return os::current_thread_cpu_time(user_sys_cpu_time != 0); | |
| 1554 } else { | |
| 1555 MutexLockerEx ml(Threads_lock); | |
| 1556 java_thread = find_java_thread_from_id(thread_id); | |
| 1557 if (java_thread != NULL) { | |
| 1558 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); | |
| 1559 } | |
| 1560 } | |
| 1561 return -1; | |
| 1562 JVM_END | |
| 1563 | |
|
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1564 // Gets an array containing the CPU times consumed by a set of threads |
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1565 // (in nanoseconds). Each element of the array is the CPU time for the |
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1566 // thread ID specified in the corresponding entry in the given array |
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1567 // of thread IDs; or -1 if the thread does not exist or has terminated. |
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1568 // If user_sys_cpu_time = true, the sum of user level and system CPU time |
|
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1569 // for the given thread is returned; otherwise, only user level CPU time |
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1570 // is returned. |
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1571 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, |
|
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1572 jlongArray timeArray, |
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1573 jboolean user_sys_cpu_time)) |
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1574 // Check if threads is null |
|
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1575 if (ids == NULL || timeArray == NULL) { |
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1576 THROW(vmSymbols::java_lang_NullPointerException()); |
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1577 } |
|
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1578 |
|
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1579 ResourceMark rm(THREAD); |
|
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1580 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
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1581 typeArrayHandle ids_ah(THREAD, ta); |
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1582 |
|
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1583 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); |
|
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1584 typeArrayHandle timeArray_h(THREAD, tia); |
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1585 |
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1586 // validate the thread id array |
|
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1587 validate_thread_id_array(ids_ah, CHECK); |
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1588 |
|
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1589 // timeArray must be of the same length as the given array of thread IDs |
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1590 int num_threads = ids_ah->length(); |
|
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1591 if (num_threads != timeArray_h->length()) { |
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1592 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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1593 "The length of the given long array does not match the length of " |
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1594 "the given array of thread IDs"); |
|
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1595 } |
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1596 |
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1597 MutexLockerEx ml(Threads_lock); |
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1598 for (int i = 0; i < num_threads; i++) { |
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1599 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); |
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1600 if (java_thread != NULL) { |
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1601 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, |
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1602 user_sys_cpu_time != 0)); |
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1603 } |
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1604 } |
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1605 JVM_END |
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1606 |
| 0 | 1607 // Returns a String array of all VM global flag names |
| 1608 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) | |
| 1609 // last flag entry is always NULL, so subtract 1 | |
| 1610 int nFlags = (int) Flag::numFlags - 1; | |
| 1611 // allocate a temp array | |
| 1142 | 1612 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 0 | 1613 nFlags, CHECK_0); |
| 1614 objArrayHandle flags_ah(THREAD, r); | |
| 1615 int num_entries = 0; | |
| 1616 for (int i = 0; i < nFlags; i++) { | |
| 1617 Flag* flag = &Flag::flags[i]; | |
| 350 | 1618 // Exclude the locked (experimental, diagnostic) flags |
| 0 | 1619 if (flag->is_unlocked() || flag->is_unlocker()) { |
| 1620 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); | |
| 1621 flags_ah->obj_at_put(num_entries, s()); | |
| 1622 num_entries++; | |
| 1623 } | |
| 1624 } | |
| 1625 | |
| 1626 if (num_entries < nFlags) { | |
| 1627 // Return array of right length | |
| 1142 | 1628 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); |
| 0 | 1629 for(int i = 0; i < num_entries; i++) { |
| 1630 res->obj_at_put(i, flags_ah->obj_at(i)); | |
| 1631 } | |
| 1632 return (jobjectArray)JNIHandles::make_local(env, res); | |
| 1633 } | |
| 1634 | |
| 1635 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); | |
| 1636 JVM_END | |
| 1637 | |
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1638 // Utility function used by jmm_GetVMGlobals. Returns false if flag type |
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1639 // can't be determined, true otherwise. If false is returned, then *global |
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1640 // will be incomplete and invalid. |
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1641 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { |
| 0 | 1642 Handle flag_name; |
| 1643 if (name() == NULL) { | |
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1644 flag_name = java_lang_String::create_from_str(flag->name, CHECK_false); |
| 0 | 1645 } else { |
| 1646 flag_name = name; | |
| 1647 } | |
| 1648 global->name = (jstring)JNIHandles::make_local(env, flag_name()); | |
| 1649 | |
| 1650 if (flag->is_bool()) { | |
| 1651 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; | |
| 1652 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; | |
| 1653 } else if (flag->is_intx()) { | |
| 1654 global->value.j = (jlong)flag->get_intx(); | |
| 1655 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
| 1656 } else if (flag->is_uintx()) { | |
| 1657 global->value.j = (jlong)flag->get_uintx(); | |
| 1658 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
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1659 } else if (flag->is_uint64_t()) { |
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1660 global->value.j = (jlong)flag->get_uint64_t(); |
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1661 global->type = JMM_VMGLOBAL_TYPE_JLONG; |
| 0 | 1662 } else if (flag->is_ccstr()) { |
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1663 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); |
| 0 | 1664 global->value.l = (jobject)JNIHandles::make_local(env, str()); |
| 1665 global->type = JMM_VMGLOBAL_TYPE_JSTRING; | |
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1666 } else { |
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1667 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; |
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1668 return false; |
| 0 | 1669 } |
| 1670 | |
| 1671 global->writeable = flag->is_writeable(); | |
| 1672 global->external = flag->is_external(); | |
| 1673 switch (flag->origin) { | |
| 1674 case DEFAULT: | |
| 1675 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; | |
| 1676 break; | |
| 1677 case COMMAND_LINE: | |
| 1678 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; | |
| 1679 break; | |
| 1680 case ENVIRON_VAR: | |
| 1681 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; | |
| 1682 break; | |
| 1683 case CONFIG_FILE: | |
| 1684 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; | |
| 1685 break; | |
| 1686 case MANAGEMENT: | |
| 1687 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; | |
| 1688 break; | |
| 1689 case ERGONOMIC: | |
| 1690 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; | |
| 1691 break; | |
| 1692 default: | |
| 1693 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; | |
| 1694 } | |
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1695 |
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1696 return true; |
| 0 | 1697 } |
| 1698 | |
| 1699 // Fill globals array of count length with jmmVMGlobal entries | |
| 1700 // specified by names. If names == NULL, fill globals array | |
| 1701 // with all Flags. Return value is number of entries | |
| 1702 // created in globals. | |
| 1703 // If a Flag with a given name in an array element does not | |
| 1704 // exist, globals[i].name will be set to NULL. | |
| 1705 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, | |
| 1706 jobjectArray names, | |
| 1707 jmmVMGlobal *globals, | |
| 1708 jint count)) | |
| 1709 | |
| 1710 | |
| 1711 if (globals == NULL) { | |
| 1712 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1713 } | |
| 1714 | |
| 1715 ResourceMark rm(THREAD); | |
| 1716 | |
| 1717 if (names != NULL) { | |
| 1718 // return the requested globals | |
| 1719 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); | |
| 1720 objArrayHandle names_ah(THREAD, ta); | |
| 1721 // Make sure we have a String array | |
| 1722 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
| 1142 | 1723 if (element_klass != SystemDictionary::String_klass()) { |
| 0 | 1724 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| 1725 "Array element type is not String class", 0); | |
| 1726 } | |
| 1727 | |
| 1728 int names_length = names_ah->length(); | |
| 1729 int num_entries = 0; | |
| 1730 for (int i = 0; i < names_length && i < count; i++) { | |
| 1731 oop s = names_ah->obj_at(i); | |
| 1732 if (s == NULL) { | |
| 1733 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1734 } | |
| 1735 | |
| 1736 Handle sh(THREAD, s); | |
| 1737 char* str = java_lang_String::as_utf8_string(s); | |
| 1738 Flag* flag = Flag::find_flag(str, strlen(str)); | |
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1739 if (flag != NULL && |
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1740 add_global_entry(env, sh, &globals[i], flag, THREAD)) { |
| 0 | 1741 num_entries++; |
| 1742 } else { | |
| 1743 globals[i].name = NULL; | |
| 1744 } | |
| 1745 } | |
| 1746 return num_entries; | |
| 1747 } else { | |
| 1748 // return all globals if names == NULL | |
| 1749 | |
| 1750 // last flag entry is always NULL, so subtract 1 | |
| 1751 int nFlags = (int) Flag::numFlags - 1; | |
| 1752 Handle null_h; | |
| 1753 int num_entries = 0; | |
| 1754 for (int i = 0; i < nFlags && num_entries < count; i++) { | |
| 1755 Flag* flag = &Flag::flags[i]; | |
| 350 | 1756 // Exclude the locked (diagnostic, experimental) flags |
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1757 if ((flag->is_unlocked() || flag->is_unlocker()) && |
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1758 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { |
| 0 | 1759 num_entries++; |
| 1760 } | |
| 1761 } | |
| 1762 return num_entries; | |
| 1763 } | |
| 1764 JVM_END | |
| 1765 | |
| 1766 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) | |
| 1767 ResourceMark rm(THREAD); | |
| 1768 | |
| 1769 oop fn = JNIHandles::resolve_external_guard(flag_name); | |
| 1770 if (fn == NULL) { | |
| 1771 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 1772 "The flag name cannot be null."); | |
| 1773 } | |
| 1774 char* name = java_lang_String::as_utf8_string(fn); | |
| 1775 Flag* flag = Flag::find_flag(name, strlen(name)); | |
| 1776 if (flag == NULL) { | |
| 1777 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1778 "Flag does not exist."); | |
| 1779 } | |
| 1780 if (!flag->is_writeable()) { | |
| 1781 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1782 "This flag is not writeable."); | |
| 1783 } | |
| 1784 | |
| 1785 bool succeed; | |
| 1786 if (flag->is_bool()) { | |
| 1787 bool bvalue = (new_value.z == JNI_TRUE ? true : false); | |
| 1788 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); | |
| 1789 } else if (flag->is_intx()) { | |
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1790 intx ivalue = (intx)new_value.j; |
| 0 | 1791 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); |
| 1792 } else if (flag->is_uintx()) { | |
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1793 uintx uvalue = (uintx)new_value.j; |
| 0 | 1794 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); |
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1795 } else if (flag->is_uint64_t()) { |
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1796 uint64_t uvalue = (uint64_t)new_value.j; |
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1797 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT); |
| 0 | 1798 } else if (flag->is_ccstr()) { |
| 1799 oop str = JNIHandles::resolve_external_guard(new_value.l); | |
| 1800 if (str == NULL) { | |
| 1801 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1802 } | |
| 1803 ccstr svalue = java_lang_String::as_utf8_string(str); | |
| 1804 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); | |
| 1805 } | |
| 1806 assert(succeed, "Setting flag should succeed"); | |
| 1807 JVM_END | |
| 1808 | |
| 1809 class ThreadTimesClosure: public ThreadClosure { | |
| 1810 private: | |
| 1811 objArrayOop _names; | |
| 1812 typeArrayOop _times; | |
| 1813 int _names_len; | |
| 1814 int _times_len; | |
| 1815 int _count; | |
| 1816 | |
| 1817 public: | |
| 1818 ThreadTimesClosure(objArrayOop names, typeArrayOop times); | |
| 1819 virtual void do_thread(Thread* thread); | |
| 1820 int count() { return _count; } | |
| 1821 }; | |
| 1822 | |
| 1823 ThreadTimesClosure::ThreadTimesClosure(objArrayOop names, | |
| 1824 typeArrayOop times) { | |
| 1825 assert(names != NULL, "names was NULL"); | |
| 1826 assert(times != NULL, "times was NULL"); | |
| 1827 _names = names; | |
| 1828 _names_len = names->length(); | |
| 1829 _times = times; | |
| 1830 _times_len = times->length(); | |
| 1831 _count = 0; | |
| 1832 } | |
| 1833 | |
| 1834 void ThreadTimesClosure::do_thread(Thread* thread) { | |
| 1835 Handle s; | |
| 1836 assert(thread != NULL, "thread was NULL"); | |
| 1837 | |
| 1838 // exclude externally visible JavaThreads | |
| 1839 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
| 1840 return; | |
| 1841 } | |
| 1842 | |
| 1843 if (_count >= _names_len || _count >= _times_len) { | |
| 1844 // skip if the result array is not big enough | |
| 1845 return; | |
| 1846 } | |
| 1847 | |
| 1848 EXCEPTION_MARK; | |
| 1849 | |
| 1850 assert(thread->name() != NULL, "All threads should have a name"); | |
| 1851 s = java_lang_String::create_from_str(thread->name(), CHECK); | |
| 1852 _names->obj_at_put(_count, s()); | |
| 1853 | |
| 1854 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? | |
| 1855 os::thread_cpu_time(thread) : -1); | |
| 1856 _count++; | |
| 1857 } | |
| 1858 | |
| 1859 // Fills names with VM internal thread names and times with the corresponding | |
| 1860 // CPU times. If names or times is NULL, a NullPointerException is thrown. | |
| 1861 // If the element type of names is not String, an IllegalArgumentException is | |
| 1862 // thrown. | |
| 1863 // If an array is not large enough to hold all the entries, only the entries | |
| 1864 // that fit will be returned. Return value is the number of VM internal | |
| 1865 // threads entries. | |
| 1866 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, | |
| 1867 jobjectArray names, | |
| 1868 jlongArray times)) | |
| 1869 if (names == NULL || times == NULL) { | |
| 1870 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1871 } | |
| 1872 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); | |
| 1873 objArrayHandle names_ah(THREAD, na); | |
| 1874 | |
| 1875 // Make sure we have a String array | |
| 1876 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
| 1142 | 1877 if (element_klass != SystemDictionary::String_klass()) { |
| 0 | 1878 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| 1879 "Array element type is not String class", 0); | |
| 1880 } | |
| 1881 | |
| 1882 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); | |
| 1883 typeArrayHandle times_ah(THREAD, ta); | |
| 1884 | |
| 1885 ThreadTimesClosure ttc(names_ah(), times_ah()); | |
| 1886 { | |
| 1887 MutexLockerEx ml(Threads_lock); | |
| 1888 Threads::threads_do(&ttc); | |
| 1889 } | |
| 1890 | |
| 1891 return ttc.count(); | |
| 1892 JVM_END | |
| 1893 | |
| 1894 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { | |
| 1895 ResourceMark rm(THREAD); | |
| 1896 | |
| 1897 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); | |
| 1898 VMThread::execute(&op); | |
| 1899 | |
| 1900 DeadlockCycle* deadlocks = op.result(); | |
| 1901 if (deadlocks == NULL) { | |
| 1902 // no deadlock found and return | |
| 1903 return Handle(); | |
| 1904 } | |
| 1905 | |
| 1906 int num_threads = 0; | |
| 1907 DeadlockCycle* cycle; | |
| 1908 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 1909 num_threads += cycle->num_threads(); | |
| 1910 } | |
| 1911 | |
| 1142 | 1912 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); |
| 0 | 1913 objArrayHandle threads_ah(THREAD, r); |
| 1914 | |
| 1915 int index = 0; | |
| 1916 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 1917 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); | |
| 1918 int len = deadlock_threads->length(); | |
| 1919 for (int i = 0; i < len; i++) { | |
| 1920 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); | |
| 1921 index++; | |
| 1922 } | |
| 1923 } | |
| 1924 return threads_ah; | |
| 1925 } | |
| 1926 | |
| 1927 // Finds cycles of threads that are deadlocked involved in object monitors | |
| 1928 // and JSR-166 synchronizers. | |
| 1929 // Returns an array of Thread objects which are in deadlock, if any. | |
| 1930 // Otherwise, returns NULL. | |
| 1931 // | |
| 1932 // Input parameter: | |
| 1933 // object_monitors_only - if true, only check object monitors | |
| 1934 // | |
| 1935 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) | |
| 1936 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); | |
| 1937 return (jobjectArray) JNIHandles::make_local(env, result()); | |
| 1938 JVM_END | |
| 1939 | |
| 1940 // Finds cycles of threads that are deadlocked on monitor locks | |
| 1941 // Returns an array of Thread objects which are in deadlock, if any. | |
| 1942 // Otherwise, returns NULL. | |
| 1943 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) | |
| 1944 Handle result = find_deadlocks(true, CHECK_0); | |
| 1945 return (jobjectArray) JNIHandles::make_local(env, result()); | |
| 1946 JVM_END | |
| 1947 | |
| 1948 // Gets the information about GC extension attributes including | |
| 1949 // the name of the attribute, its type, and a short description. | |
| 1950 // | |
| 1951 // Input parameters: | |
| 1952 // mgr - GC memory manager | |
| 1953 // info - caller allocated array of jmmExtAttributeInfo | |
| 1954 // count - number of elements of the info array | |
| 1955 // | |
| 1956 // Returns the number of GC extension attributes filled in the info array; or | |
| 1957 // -1 if info is not big enough | |
| 1958 // | |
| 1959 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) | |
| 1960 // All GC memory managers have 1 attribute (number of GC threads) | |
| 1961 if (count == 0) { | |
| 1962 return 0; | |
| 1963 } | |
| 1964 | |
| 1965 if (info == NULL) { | |
| 1966 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1967 } | |
| 1968 | |
| 1969 info[0].name = "GcThreadCount"; | |
| 1970 info[0].type = 'I'; | |
| 1971 info[0].description = "Number of GC threads"; | |
| 1972 return 1; | |
| 1973 JVM_END | |
| 1974 | |
| 1975 // verify the given array is an array of java/lang/management/MemoryUsage objects | |
| 1976 // of a given length and return the objArrayOop | |
| 1977 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { | |
| 1978 if (array == NULL) { | |
| 1979 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1980 } | |
| 1981 | |
| 1982 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 1983 objArrayHandle array_h(THREAD, oa); | |
| 1984 | |
| 1985 // array must be of the given length | |
| 1986 if (length != array_h->length()) { | |
| 1987 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1988 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); | |
| 1989 } | |
| 1990 | |
| 1991 // check if the element of array is of type MemoryUsage class | |
| 1992 klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); | |
| 1993 klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass(); | |
| 1994 if (element_klass != usage_klass) { | |
| 1995 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1996 "The element type is not MemoryUsage class", 0); | |
| 1997 } | |
| 1998 | |
| 1999 return array_h(); | |
| 2000 } | |
| 2001 | |
| 2002 // Gets the statistics of the last GC of a given GC memory manager. | |
| 2003 // Input parameters: | |
| 2004 // obj - GarbageCollectorMXBean object | |
| 2005 // gc_stat - caller allocated jmmGCStat where: | |
| 2006 // a. before_gc_usage - array of MemoryUsage objects | |
| 2007 // b. after_gc_usage - array of MemoryUsage objects | |
| 2008 // c. gc_ext_attributes_values_size is set to the | |
| 2009 // gc_ext_attribute_values array allocated | |
| 2010 // d. gc_ext_attribute_values is a caller allocated array of jvalue. | |
| 2011 // | |
| 2012 // On return, | |
| 2013 // gc_index == 0 indicates no GC statistics available | |
| 2014 // | |
| 2015 // before_gc_usage and after_gc_usage - filled with per memory pool | |
| 2016 // before and after GC usage in the same order as the memory pools | |
| 2017 // returned by GetMemoryPools for a given GC memory manager. | |
| 2018 // num_gc_ext_attributes indicates the number of elements in | |
| 2019 // the gc_ext_attribute_values array is filled; or | |
| 2020 // -1 if the gc_ext_attributes_values array is not big enough | |
| 2021 // | |
| 2022 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) | |
| 2023 ResourceMark rm(THREAD); | |
| 2024 | |
| 2025 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { | |
| 2026 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 2027 } | |
| 2028 | |
| 2029 // Get the GCMemoryManager | |
| 2030 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); | |
| 2031 | |
| 2032 // Make a copy of the last GC statistics | |
| 2033 // GC may occur while constructing the last GC information | |
| 2034 int num_pools = MemoryService::num_memory_pools(); | |
| 2035 GCStatInfo* stat = new GCStatInfo(num_pools); | |
|
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2036 if (mgr->get_last_gc_stat(stat) == 0) { |
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2037 gc_stat->gc_index = 0; |
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2038 return; |
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2039 } |
| 0 | 2040 |
| 2041 gc_stat->gc_index = stat->gc_index(); | |
| 2042 gc_stat->start_time = Management::ticks_to_ms(stat->start_time()); | |
| 2043 gc_stat->end_time = Management::ticks_to_ms(stat->end_time()); | |
| 2044 | |
| 2045 // Current implementation does not have GC extension attributes | |
| 2046 gc_stat->num_gc_ext_attributes = 0; | |
| 2047 | |
| 2048 // Fill the arrays of MemoryUsage objects with before and after GC | |
| 2049 // per pool memory usage | |
| 2050 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, | |
| 2051 num_pools, | |
| 2052 CHECK); | |
| 2053 objArrayHandle usage_before_gc_ah(THREAD, bu); | |
| 2054 | |
| 2055 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, | |
| 2056 num_pools, | |
| 2057 CHECK); | |
| 2058 objArrayHandle usage_after_gc_ah(THREAD, au); | |
| 2059 | |
| 2060 for (int i = 0; i < num_pools; i++) { | |
| 2061 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK); | |
| 2062 Handle after_usage; | |
| 2063 | |
| 2064 MemoryUsage u = stat->after_gc_usage_for_pool(i); | |
| 2065 if (u.max_size() == 0 && u.used() > 0) { | |
| 2066 // If max size == 0, this pool is a survivor space. | |
| 2067 // Set max size = -1 since the pools will be swapped after GC. | |
| 2068 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); | |
| 2069 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); | |
| 2070 } else { | |
| 2071 after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK); | |
| 2072 } | |
| 2073 usage_before_gc_ah->obj_at_put(i, before_usage()); | |
| 2074 usage_after_gc_ah->obj_at_put(i, after_usage()); | |
| 2075 } | |
| 2076 | |
| 2077 if (gc_stat->gc_ext_attribute_values_size > 0) { | |
| 2078 // Current implementation only has 1 attribute (number of GC threads) | |
| 2079 // The type is 'I' | |
| 2080 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); | |
| 2081 } | |
| 2082 JVM_END | |
| 2083 | |
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2084 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) |
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2085 ResourceMark rm(THREAD); |
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2086 // Get the GCMemoryManager |
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2087 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); |
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2088 mgr->set_notification_enabled(enabled?true:false); |
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2089 JVM_END |
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2090 |
| 0 | 2091 // Dump heap - Returns 0 if succeeds. |
| 2092 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) | |
| 2093 #ifndef SERVICES_KERNEL | |
| 2094 ResourceMark rm(THREAD); | |
| 2095 oop on = JNIHandles::resolve_external_guard(outputfile); | |
| 2096 if (on == NULL) { | |
| 2097 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
| 2098 "Output file name cannot be null.", -1); | |
| 2099 } | |
| 2100 char* name = java_lang_String::as_utf8_string(on); | |
| 2101 if (name == NULL) { | |
| 2102 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
| 2103 "Output file name cannot be null.", -1); | |
| 2104 } | |
| 2105 HeapDumper dumper(live ? true : false); | |
| 2106 if (dumper.dump(name) != 0) { | |
| 2107 const char* errmsg = dumper.error_as_C_string(); | |
| 2108 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); | |
| 2109 } | |
| 2110 return 0; | |
| 2111 #else // SERVICES_KERNEL | |
| 2112 return -1; | |
| 2113 #endif // SERVICES_KERNEL | |
| 2114 JVM_END | |
| 2115 | |
| 4133 | 2116 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) |
| 2117 ResourceMark rm(THREAD); | |
| 2118 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(); | |
| 2119 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), | |
| 2120 dcmd_list->length(), CHECK_NULL); | |
| 2121 objArrayHandle cmd_array(THREAD, cmd_array_oop); | |
| 2122 for (int i = 0; i < dcmd_list->length(); i++) { | |
| 2123 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); | |
| 2124 cmd_array->obj_at_put(i, cmd_name); | |
| 2125 } | |
| 2126 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); | |
| 2127 JVM_END | |
| 2128 | |
| 2129 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, | |
| 2130 dcmdInfo* infoArray)) | |
| 2131 if (cmds == NULL || infoArray == NULL) { | |
| 2132 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 2133 } | |
| 2134 | |
| 2135 ResourceMark rm(THREAD); | |
| 2136 | |
| 2137 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); | |
| 2138 objArrayHandle cmds_ah(THREAD, ca); | |
| 2139 | |
| 2140 // Make sure we have a String array | |
| 2141 klassOop element_klass = objArrayKlass::cast(cmds_ah->klass())->element_klass(); | |
| 2142 if (element_klass != SystemDictionary::String_klass()) { | |
| 2143 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 2144 "Array element type is not String class"); | |
| 2145 } | |
| 2146 | |
| 2147 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(); | |
| 2148 | |
| 2149 int num_cmds = cmds_ah->length(); | |
| 2150 for (int i = 0; i < num_cmds; i++) { | |
| 2151 oop cmd = cmds_ah->obj_at(i); | |
| 2152 if (cmd == NULL) { | |
| 2153 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 2154 "Command name cannot be null."); | |
| 2155 } | |
| 2156 char* cmd_name = java_lang_String::as_utf8_string(cmd); | |
| 2157 if (cmd_name == NULL) { | |
| 2158 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 2159 "Command name cannot be null."); | |
| 2160 } | |
| 2161 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); | |
| 2162 if (pos == -1) { | |
| 2163 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 2164 "Unknown diagnostic command"); | |
| 2165 } | |
| 2166 DCmdInfo* info = info_list->at(pos); | |
| 2167 infoArray[i].name = info->name(); | |
| 2168 infoArray[i].description = info->description(); | |
| 2169 infoArray[i].impact = info->impact(); | |
| 2170 infoArray[i].num_arguments = info->num_arguments(); | |
| 2171 infoArray[i].enabled = info->is_enabled(); | |
| 2172 } | |
| 2173 JVM_END | |
| 2174 | |
| 2175 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, | |
| 2176 jstring command, dcmdArgInfo* infoArray)) | |
| 2177 ResourceMark rm(THREAD); | |
| 2178 oop cmd = JNIHandles::resolve_external_guard(command); | |
| 2179 if (cmd == NULL) { | |
| 2180 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 2181 "Command line cannot be null."); | |
| 2182 } | |
| 2183 char* cmd_name = java_lang_String::as_utf8_string(cmd); | |
| 2184 if (cmd_name == NULL) { | |
| 2185 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 2186 "Command line content cannot be null."); | |
| 2187 } | |
| 2188 DCmd* dcmd = NULL; | |
| 2189 DCmdFactory*factory = DCmdFactory::factory(cmd_name, strlen(cmd_name)); | |
| 2190 if (factory != NULL) { | |
| 2191 dcmd = factory->create_resource_instance(NULL); | |
| 2192 } | |
| 2193 if (dcmd == NULL) { | |
| 2194 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 2195 "Unknown diagnostic command"); | |
| 2196 } | |
| 2197 DCmdMark mark(dcmd); | |
| 2198 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); | |
| 2199 if (array->length() == 0) { | |
| 2200 return; | |
| 2201 } | |
| 2202 for (int i = 0; i < array->length(); i++) { | |
| 2203 infoArray[i].name = array->at(i)->name(); | |
| 2204 infoArray[i].description = array->at(i)->description(); | |
| 2205 infoArray[i].type = array->at(i)->type(); | |
| 2206 infoArray[i].default_string = array->at(i)->default_string(); | |
| 2207 infoArray[i].mandatory = array->at(i)->is_mandatory(); | |
| 2208 infoArray[i].option = array->at(i)->is_option(); | |
| 2209 infoArray[i].position = array->at(i)->position(); | |
| 2210 } | |
| 2211 return; | |
| 2212 JVM_END | |
| 2213 | |
| 2214 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) | |
| 2215 ResourceMark rm(THREAD); | |
| 2216 oop cmd = JNIHandles::resolve_external_guard(commandline); | |
| 2217 if (cmd == NULL) { | |
| 2218 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), | |
| 2219 "Command line cannot be null."); | |
| 2220 } | |
| 2221 char* cmdline = java_lang_String::as_utf8_string(cmd); | |
| 2222 if (cmdline == NULL) { | |
| 2223 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), | |
| 2224 "Command line content cannot be null."); | |
| 2225 } | |
| 2226 bufferedStream output; | |
| 2227 DCmd::parse_and_execute(&output, cmdline, ' ', CHECK_NULL); | |
| 2228 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); | |
| 2229 return (jstring) JNIHandles::make_local(env, result); | |
| 2230 JVM_END | |
| 2231 | |
| 0 | 2232 jlong Management::ticks_to_ms(jlong ticks) { |
| 2233 assert(os::elapsed_frequency() > 0, "Must be non-zero"); | |
| 2234 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) | |
| 2235 * (double)1000.0); | |
| 2236 } | |
| 2237 | |
| 2238 const struct jmmInterface_1_ jmm_interface = { | |
| 2239 NULL, | |
| 2240 NULL, | |
| 2241 jmm_GetVersion, | |
| 2242 jmm_GetOptionalSupport, | |
| 2243 jmm_GetInputArguments, | |
| 2244 jmm_GetThreadInfo, | |
| 2245 jmm_GetInputArgumentArray, | |
| 2246 jmm_GetMemoryPools, | |
| 2247 jmm_GetMemoryManagers, | |
| 2248 jmm_GetMemoryPoolUsage, | |
| 2249 jmm_GetPeakMemoryPoolUsage, | |
|
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2250 jmm_GetThreadAllocatedMemory, |
| 0 | 2251 jmm_GetMemoryUsage, |
| 2252 jmm_GetLongAttribute, | |
| 2253 jmm_GetBoolAttribute, | |
| 2254 jmm_SetBoolAttribute, | |
| 2255 jmm_GetLongAttributes, | |
| 2256 jmm_FindMonitorDeadlockedThreads, | |
| 2257 jmm_GetThreadCpuTime, | |
| 2258 jmm_GetVMGlobalNames, | |
| 2259 jmm_GetVMGlobals, | |
| 2260 jmm_GetInternalThreadTimes, | |
| 2261 jmm_ResetStatistic, | |
| 2262 jmm_SetPoolSensor, | |
| 2263 jmm_SetPoolThreshold, | |
| 2264 jmm_GetPoolCollectionUsage, | |
| 2265 jmm_GetGCExtAttributeInfo, | |
| 2266 jmm_GetLastGCStat, | |
| 2267 jmm_GetThreadCpuTimeWithKind, | |
|
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2268 jmm_GetThreadCpuTimesWithKind, |
| 0 | 2269 jmm_DumpHeap0, |
| 2270 jmm_FindDeadlockedThreads, | |
| 2271 jmm_SetVMGlobal, | |
| 2272 NULL, | |
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2273 jmm_DumpThreads, |
| 4133 | 2274 jmm_SetGCNotificationEnabled, |
| 2275 jmm_GetDiagnosticCommands, | |
| 2276 jmm_GetDiagnosticCommandInfo, | |
| 2277 jmm_GetDiagnosticCommandArgumentsInfo, | |
| 2278 jmm_ExecuteDiagnosticCommand | |
| 0 | 2279 }; |
| 2280 | |
| 2281 void* Management::get_jmm_interface(int version) { | |
| 2282 if (version == JMM_VERSION_1_0) { | |
| 2283 return (void*) &jmm_interface; | |
| 2284 } | |
| 2285 return NULL; | |
| 2286 } |