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annotate src/share/vm/services/management.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | 1c63587d925b |
| children | b1a2afa37ec4 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 2010, 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" | |
| 41 #include "services/classLoadingService.hpp" | |
| 42 #include "services/heapDumper.hpp" | |
| 43 #include "services/lowMemoryDetector.hpp" | |
| 44 #include "services/management.hpp" | |
| 45 #include "services/memoryManager.hpp" | |
| 46 #include "services/memoryPool.hpp" | |
| 47 #include "services/memoryService.hpp" | |
| 48 #include "services/runtimeService.hpp" | |
| 49 #include "services/threadService.hpp" | |
| 0 | 50 |
| 51 PerfVariable* Management::_begin_vm_creation_time = NULL; | |
| 52 PerfVariable* Management::_end_vm_creation_time = NULL; | |
| 53 PerfVariable* Management::_vm_init_done_time = NULL; | |
| 54 | |
| 55 klassOop Management::_sensor_klass = NULL; | |
| 56 klassOop Management::_threadInfo_klass = NULL; | |
| 57 klassOop Management::_memoryUsage_klass = NULL; | |
| 58 klassOop Management::_memoryPoolMXBean_klass = NULL; | |
| 59 klassOop Management::_memoryManagerMXBean_klass = NULL; | |
| 60 klassOop Management::_garbageCollectorMXBean_klass = NULL; | |
| 61 klassOop Management::_managementFactory_klass = NULL; | |
| 62 | |
| 63 jmmOptionalSupport Management::_optional_support = {0}; | |
| 64 TimeStamp Management::_stamp; | |
| 65 | |
| 66 void management_init() { | |
| 67 Management::init(); | |
| 68 ThreadService::init(); | |
| 69 RuntimeService::init(); | |
| 70 ClassLoadingService::init(); | |
| 71 } | |
| 72 | |
| 73 void Management::init() { | |
| 74 EXCEPTION_MARK; | |
| 75 | |
| 76 // These counters are for java.lang.management API support. | |
| 77 // They are created even if -XX:-UsePerfData is set and in | |
| 78 // that case, they will be allocated on C heap. | |
| 79 | |
| 80 _begin_vm_creation_time = | |
| 81 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", | |
| 82 PerfData::U_None, CHECK); | |
| 83 | |
| 84 _end_vm_creation_time = | |
| 85 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", | |
| 86 PerfData::U_None, CHECK); | |
| 87 | |
| 88 _vm_init_done_time = | |
| 89 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", | |
| 90 PerfData::U_None, CHECK); | |
| 91 | |
| 92 // Initialize optional support | |
| 93 _optional_support.isLowMemoryDetectionSupported = 1; | |
| 94 _optional_support.isCompilationTimeMonitoringSupported = 1; | |
| 95 _optional_support.isThreadContentionMonitoringSupported = 1; | |
| 96 | |
| 97 if (os::is_thread_cpu_time_supported()) { | |
| 98 _optional_support.isCurrentThreadCpuTimeSupported = 1; | |
| 99 _optional_support.isOtherThreadCpuTimeSupported = 1; | |
| 100 } else { | |
| 101 _optional_support.isCurrentThreadCpuTimeSupported = 0; | |
| 102 _optional_support.isOtherThreadCpuTimeSupported = 0; | |
| 103 } | |
| 104 _optional_support.isBootClassPathSupported = 1; | |
| 105 _optional_support.isObjectMonitorUsageSupported = 1; | |
| 106 #ifndef SERVICES_KERNEL | |
| 107 // This depends on the heap inspector | |
| 108 _optional_support.isSynchronizerUsageSupported = 1; | |
| 109 #endif // SERVICES_KERNEL | |
| 110 } | |
| 111 | |
| 112 void Management::initialize(TRAPS) { | |
| 113 // Start the low memory detector thread | |
| 114 LowMemoryDetector::initialize(); | |
| 115 | |
| 116 if (ManagementServer) { | |
| 117 ResourceMark rm(THREAD); | |
| 118 HandleMark hm(THREAD); | |
| 119 | |
| 120 // Load and initialize the sun.management.Agent class | |
| 121 // invoke startAgent method to start the management server | |
| 122 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
| 123 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::sun_management_Agent(), | |
| 124 loader, | |
| 125 Handle(), | |
| 126 true, | |
| 127 CHECK); | |
| 128 instanceKlassHandle ik (THREAD, k); | |
| 129 | |
| 130 JavaValue result(T_VOID); | |
| 131 JavaCalls::call_static(&result, | |
| 132 ik, | |
| 133 vmSymbolHandles::startAgent_name(), | |
| 134 vmSymbolHandles::void_method_signature(), | |
| 135 CHECK); | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 void Management::get_optional_support(jmmOptionalSupport* support) { | |
| 140 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); | |
| 141 } | |
| 142 | |
| 143 klassOop Management::load_and_initialize_klass(symbolHandle sh, TRAPS) { | |
| 144 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); | |
| 145 instanceKlassHandle ik (THREAD, k); | |
| 146 if (ik->should_be_initialized()) { | |
| 147 ik->initialize(CHECK_NULL); | |
| 148 } | |
| 149 return ik(); | |
| 150 } | |
| 151 | |
| 152 void Management::record_vm_startup_time(jlong begin, jlong duration) { | |
| 153 // if the performance counter is not initialized, | |
| 154 // then vm initialization failed; simply return. | |
| 155 if (_begin_vm_creation_time == NULL) return; | |
| 156 | |
| 157 _begin_vm_creation_time->set_value(begin); | |
| 158 _end_vm_creation_time->set_value(begin + duration); | |
| 159 PerfMemory::set_accessible(true); | |
| 160 } | |
| 161 | |
| 162 jlong Management::timestamp() { | |
| 163 TimeStamp t; | |
| 164 t.update(); | |
| 165 return t.ticks() - _stamp.ticks(); | |
| 166 } | |
| 167 | |
| 168 void Management::oops_do(OopClosure* f) { | |
| 169 MemoryService::oops_do(f); | |
| 170 ThreadService::oops_do(f); | |
| 171 | |
| 172 f->do_oop((oop*) &_sensor_klass); | |
| 173 f->do_oop((oop*) &_threadInfo_klass); | |
| 174 f->do_oop((oop*) &_memoryUsage_klass); | |
| 175 f->do_oop((oop*) &_memoryPoolMXBean_klass); | |
| 176 f->do_oop((oop*) &_memoryManagerMXBean_klass); | |
| 177 f->do_oop((oop*) &_garbageCollectorMXBean_klass); | |
| 178 f->do_oop((oop*) &_managementFactory_klass); | |
| 179 } | |
| 180 | |
| 181 klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { | |
| 182 if (_threadInfo_klass == NULL) { | |
| 183 _threadInfo_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_ThreadInfo(), CHECK_NULL); | |
| 184 } | |
| 185 return _threadInfo_klass; | |
| 186 } | |
| 187 | |
| 188 klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) { | |
| 189 if (_memoryUsage_klass == NULL) { | |
| 190 _memoryUsage_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryUsage(), CHECK_NULL); | |
| 191 } | |
| 192 return _memoryUsage_klass; | |
| 193 } | |
| 194 | |
| 195 klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { | |
| 196 if (_memoryPoolMXBean_klass == NULL) { | |
| 197 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); | |
| 198 } | |
| 199 return _memoryPoolMXBean_klass; | |
| 200 } | |
| 201 | |
| 202 klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { | |
| 203 if (_memoryManagerMXBean_klass == NULL) { | |
| 204 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); | |
| 205 } | |
| 206 return _memoryManagerMXBean_klass; | |
| 207 } | |
| 208 | |
| 209 klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { | |
| 210 if (_garbageCollectorMXBean_klass == NULL) { | |
| 211 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); | |
| 212 } | |
| 213 return _garbageCollectorMXBean_klass; | |
| 214 } | |
| 215 | |
| 216 klassOop Management::sun_management_Sensor_klass(TRAPS) { | |
| 217 if (_sensor_klass == NULL) { | |
| 218 _sensor_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_Sensor(), CHECK_NULL); | |
| 219 } | |
| 220 return _sensor_klass; | |
| 221 } | |
| 222 | |
| 223 klassOop Management::sun_management_ManagementFactory_klass(TRAPS) { | |
| 224 if (_managementFactory_klass == NULL) { | |
| 225 _managementFactory_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_ManagementFactory(), CHECK_NULL); | |
| 226 } | |
| 227 return _managementFactory_klass; | |
| 228 } | |
| 229 | |
| 230 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { | |
| 231 Handle snapshot_thread(THREAD, snapshot->threadObj()); | |
| 232 | |
| 233 jlong contended_time; | |
| 234 jlong waited_time; | |
| 235 if (ThreadService::is_thread_monitoring_contention()) { | |
| 236 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); | |
| 237 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); | |
| 238 } else { | |
| 239 // set them to -1 if thread contention monitoring is disabled. | |
| 240 contended_time = max_julong; | |
| 241 waited_time = max_julong; | |
| 242 } | |
| 243 | |
| 244 int thread_status = snapshot->thread_status(); | |
| 245 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); | |
| 246 if (snapshot->is_ext_suspended()) { | |
| 247 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; | |
| 248 } | |
| 249 if (snapshot->is_in_native()) { | |
| 250 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; | |
| 251 } | |
| 252 | |
| 253 ThreadStackTrace* st = snapshot->get_stack_trace(); | |
| 254 Handle stacktrace_h; | |
| 255 if (st != NULL) { | |
| 256 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); | |
| 257 } else { | |
| 258 stacktrace_h = Handle(); | |
| 259 } | |
| 260 | |
| 261 args->push_oop(snapshot_thread); | |
| 262 args->push_int(thread_status); | |
| 263 args->push_oop(Handle(THREAD, snapshot->blocker_object())); | |
| 264 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); | |
| 265 args->push_long(snapshot->contended_enter_count()); | |
| 266 args->push_long(contended_time); | |
| 267 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); | |
| 268 args->push_long(waited_time); | |
| 269 args->push_oop(stacktrace_h); | |
| 270 } | |
| 271 | |
| 272 // Helper function to construct a ThreadInfo object | |
| 273 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { | |
| 274 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 275 instanceKlassHandle ik (THREAD, k); | |
| 276 | |
| 277 JavaValue result(T_VOID); | |
| 278 JavaCallArguments args(14); | |
| 279 | |
| 280 // First allocate a ThreadObj object and | |
| 281 // push the receiver as the first argument | |
| 282 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
| 283 args.push_oop(element); | |
| 284 | |
| 285 // initialize the arguments for the ThreadInfo constructor | |
| 286 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
| 287 | |
| 288 // Call ThreadInfo constructor with no locked monitors and synchronizers | |
| 289 JavaCalls::call_special(&result, | |
| 290 ik, | |
| 291 vmSymbolHandles::object_initializer_name(), | |
| 292 vmSymbolHandles::java_lang_management_ThreadInfo_constructor_signature(), | |
| 293 &args, | |
| 294 CHECK_NULL); | |
| 295 | |
| 296 return (instanceOop) element(); | |
| 297 } | |
| 298 | |
| 299 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, | |
| 300 objArrayHandle monitors_array, | |
| 301 typeArrayHandle depths_array, | |
| 302 objArrayHandle synchronizers_array, | |
| 303 TRAPS) { | |
| 304 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 305 instanceKlassHandle ik (THREAD, k); | |
| 306 | |
| 307 JavaValue result(T_VOID); | |
| 308 JavaCallArguments args(17); | |
| 309 | |
| 310 // First allocate a ThreadObj object and | |
| 311 // push the receiver as the first argument | |
| 312 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
| 313 args.push_oop(element); | |
| 314 | |
| 315 // initialize the arguments for the ThreadInfo constructor | |
| 316 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
| 317 | |
| 318 // push the locked monitors and synchronizers in the arguments | |
| 319 args.push_oop(monitors_array); | |
| 320 args.push_oop(depths_array); | |
| 321 args.push_oop(synchronizers_array); | |
| 322 | |
| 323 // Call ThreadInfo constructor with locked monitors and synchronizers | |
| 324 JavaCalls::call_special(&result, | |
| 325 ik, | |
| 326 vmSymbolHandles::object_initializer_name(), | |
| 327 vmSymbolHandles::java_lang_management_ThreadInfo_with_locks_constructor_signature(), | |
| 328 &args, | |
| 329 CHECK_NULL); | |
| 330 | |
| 331 return (instanceOop) element(); | |
| 332 } | |
| 333 | |
| 334 // Helper functions | |
| 335 static JavaThread* find_java_thread_from_id(jlong thread_id) { | |
| 336 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); | |
| 337 | |
| 338 JavaThread* java_thread = NULL; | |
| 339 // Sequential search for now. Need to do better optimization later. | |
| 340 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 341 oop tobj = thread->threadObj(); | |
| 342 if (!thread->is_exiting() && | |
| 343 tobj != NULL && | |
| 344 thread_id == java_lang_Thread::thread_id(tobj)) { | |
| 345 java_thread = thread; | |
| 346 break; | |
| 347 } | |
| 348 } | |
| 349 return java_thread; | |
| 350 } | |
| 351 | |
| 352 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { | |
| 353 if (mgr == NULL) { | |
| 354 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 355 } | |
| 356 oop mgr_obj = JNIHandles::resolve(mgr); | |
| 357 instanceHandle h(THREAD, (instanceOop) mgr_obj); | |
| 358 | |
| 359 klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); | |
| 360 if (!h->is_a(k)) { | |
| 361 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 362 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", | |
| 363 NULL); | |
| 364 } | |
| 365 | |
| 366 MemoryManager* gc = MemoryService::get_memory_manager(h); | |
| 367 if (gc == NULL || !gc->is_gc_memory_manager()) { | |
| 368 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 369 "Invalid GC memory manager", | |
| 370 NULL); | |
| 371 } | |
| 372 return (GCMemoryManager*) gc; | |
| 373 } | |
| 374 | |
| 375 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { | |
| 376 if (obj == NULL) { | |
| 377 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 378 } | |
| 379 | |
| 380 oop pool_obj = JNIHandles::resolve(obj); | |
| 381 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
| 382 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
| 383 | |
| 384 return MemoryService::get_memory_pool(ph); | |
| 385 } | |
| 386 | |
| 387 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { | |
| 388 int num_threads = ids_ah->length(); | |
| 389 // should be non-empty array | |
| 390 if (num_threads == 0) { | |
| 391 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 392 "Empty array of thread IDs"); | |
| 393 } | |
| 394 | |
| 395 // Validate input thread IDs | |
| 396 int i = 0; | |
| 397 for (i = 0; i < num_threads; i++) { | |
| 398 jlong tid = ids_ah->long_at(i); | |
| 399 if (tid <= 0) { | |
| 400 // throw exception if invalid thread id. | |
| 401 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 402 "Invalid thread ID entry"); | |
| 403 } | |
| 404 } | |
| 405 | |
| 406 } | |
| 407 | |
| 408 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { | |
| 409 | |
| 410 // check if the element of infoArray is of type ThreadInfo class | |
| 411 klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); | |
| 412 klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass(); | |
| 413 if (element_klass != threadinfo_klass) { | |
| 414 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 415 "infoArray element type is not ThreadInfo class"); | |
| 416 } | |
| 417 | |
| 418 } | |
| 419 | |
| 420 | |
| 421 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { | |
| 422 if (obj == NULL) { | |
| 423 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 424 } | |
| 425 | |
| 426 oop mgr_obj = JNIHandles::resolve(obj); | |
| 427 assert(mgr_obj->is_instance(), "Should be an instanceOop"); | |
| 428 instanceHandle mh(THREAD, (instanceOop) mgr_obj); | |
| 429 | |
| 430 return MemoryService::get_memory_manager(mh); | |
| 431 } | |
| 432 | |
| 433 // Returns a version string and sets major and minor version if | |
| 434 // the input parameters are non-null. | |
| 435 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) | |
| 436 return JMM_VERSION; | |
| 437 JVM_END | |
| 438 | |
| 439 // Gets the list of VM monitoring and management optional supports | |
| 440 // Returns 0 if succeeded; otherwise returns non-zero. | |
| 441 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) | |
| 442 if (support == NULL) { | |
| 443 return -1; | |
| 444 } | |
| 445 Management::get_optional_support(support); | |
| 446 return 0; | |
| 447 JVM_END | |
| 448 | |
| 449 // Returns a java.lang.String object containing the input arguments to the VM. | |
| 450 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) | |
| 451 ResourceMark rm(THREAD); | |
| 452 | |
| 453 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
| 454 return NULL; | |
| 455 } | |
| 456 | |
| 457 char** vm_flags = Arguments::jvm_flags_array(); | |
| 458 char** vm_args = Arguments::jvm_args_array(); | |
| 459 int num_flags = Arguments::num_jvm_flags(); | |
| 460 int num_args = Arguments::num_jvm_args(); | |
| 461 | |
| 462 size_t length = 1; // null terminator | |
| 463 int i; | |
| 464 for (i = 0; i < num_flags; i++) { | |
| 465 length += strlen(vm_flags[i]); | |
| 466 } | |
| 467 for (i = 0; i < num_args; i++) { | |
| 468 length += strlen(vm_args[i]); | |
| 469 } | |
| 470 // add a space between each argument | |
| 471 length += num_flags + num_args - 1; | |
| 472 | |
| 473 // Return the list of input arguments passed to the VM | |
| 474 // and preserve the order that the VM processes. | |
| 475 char* args = NEW_RESOURCE_ARRAY(char, length); | |
| 476 args[0] = '\0'; | |
| 477 // concatenate all jvm_flags | |
| 478 if (num_flags > 0) { | |
| 479 strcat(args, vm_flags[0]); | |
| 480 for (i = 1; i < num_flags; i++) { | |
| 481 strcat(args, " "); | |
| 482 strcat(args, vm_flags[i]); | |
| 483 } | |
| 484 } | |
| 485 | |
| 486 if (num_args > 0 && num_flags > 0) { | |
| 487 // append a space if args already contains one or more jvm_flags | |
| 488 strcat(args, " "); | |
| 489 } | |
| 490 | |
| 491 // concatenate all jvm_args | |
| 492 if (num_args > 0) { | |
| 493 strcat(args, vm_args[0]); | |
| 494 for (i = 1; i < num_args; i++) { | |
| 495 strcat(args, " "); | |
| 496 strcat(args, vm_args[i]); | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); | |
| 501 return JNIHandles::make_local(env, hargs()); | |
| 502 JVM_END | |
| 503 | |
| 504 // Returns an array of java.lang.String object containing the input arguments to the VM. | |
| 505 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) | |
| 506 ResourceMark rm(THREAD); | |
| 507 | |
| 508 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
| 509 return NULL; | |
| 510 } | |
| 511 | |
| 512 char** vm_flags = Arguments::jvm_flags_array(); | |
| 513 char** vm_args = Arguments::jvm_args_array(); | |
| 514 int num_flags = Arguments::num_jvm_flags(); | |
| 515 int num_args = Arguments::num_jvm_args(); | |
| 516 | |
| 1142 | 517 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); |
| 0 | 518 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); |
| 519 objArrayHandle result_h(THREAD, r); | |
| 520 | |
| 521 int index = 0; | |
| 522 for (int j = 0; j < num_flags; j++, index++) { | |
| 523 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); | |
| 524 result_h->obj_at_put(index, h()); | |
| 525 } | |
| 526 for (int i = 0; i < num_args; i++, index++) { | |
| 527 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); | |
| 528 result_h->obj_at_put(index, h()); | |
| 529 } | |
| 530 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
| 531 JVM_END | |
| 532 | |
| 533 // Returns an array of java/lang/management/MemoryPoolMXBean object | |
| 534 // one for each memory pool if obj == null; otherwise returns | |
| 535 // an array of memory pools for a given memory manager if | |
| 536 // it is a valid memory manager. | |
| 537 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) | |
| 538 ResourceMark rm(THREAD); | |
| 539 | |
| 540 int num_memory_pools; | |
| 541 MemoryManager* mgr = NULL; | |
| 542 if (obj == NULL) { | |
| 543 num_memory_pools = MemoryService::num_memory_pools(); | |
| 544 } else { | |
| 545 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); | |
| 546 if (mgr == NULL) { | |
| 547 return NULL; | |
| 548 } | |
| 549 num_memory_pools = mgr->num_memory_pools(); | |
| 550 } | |
| 551 | |
| 552 // Allocate the resulting MemoryPoolMXBean[] object | |
| 553 klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); | |
| 554 instanceKlassHandle ik (THREAD, k); | |
| 555 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); | |
| 556 objArrayHandle poolArray(THREAD, r); | |
| 557 | |
| 558 if (mgr == NULL) { | |
| 559 // Get all memory pools | |
| 560 for (int i = 0; i < num_memory_pools; i++) { | |
| 561 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
| 562 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
| 563 instanceHandle ph(THREAD, p); | |
| 564 poolArray->obj_at_put(i, ph()); | |
| 565 } | |
| 566 } else { | |
| 567 // Get memory pools managed by a given memory manager | |
| 568 for (int i = 0; i < num_memory_pools; i++) { | |
| 569 MemoryPool* pool = mgr->get_memory_pool(i); | |
| 570 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
| 571 instanceHandle ph(THREAD, p); | |
| 572 poolArray->obj_at_put(i, ph()); | |
| 573 } | |
| 574 } | |
| 575 return (jobjectArray) JNIHandles::make_local(env, poolArray()); | |
| 576 JVM_END | |
| 577 | |
| 578 // Returns an array of java/lang/management/MemoryManagerMXBean object | |
| 579 // one for each memory manager if obj == null; otherwise returns | |
| 580 // an array of memory managers for a given memory pool if | |
| 581 // it is a valid memory pool. | |
| 582 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) | |
| 583 ResourceMark rm(THREAD); | |
| 584 | |
| 585 int num_mgrs; | |
| 586 MemoryPool* pool = NULL; | |
| 587 if (obj == NULL) { | |
| 588 num_mgrs = MemoryService::num_memory_managers(); | |
| 589 } else { | |
| 590 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 591 if (pool == NULL) { | |
| 592 return NULL; | |
| 593 } | |
| 594 num_mgrs = pool->num_memory_managers(); | |
| 595 } | |
| 596 | |
| 597 // Allocate the resulting MemoryManagerMXBean[] object | |
| 598 klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); | |
| 599 instanceKlassHandle ik (THREAD, k); | |
| 600 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); | |
| 601 objArrayHandle mgrArray(THREAD, r); | |
| 602 | |
| 603 if (pool == NULL) { | |
| 604 // Get all memory managers | |
| 605 for (int i = 0; i < num_mgrs; i++) { | |
| 606 MemoryManager* mgr = MemoryService::get_memory_manager(i); | |
| 607 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
| 608 instanceHandle ph(THREAD, p); | |
| 609 mgrArray->obj_at_put(i, ph()); | |
| 610 } | |
| 611 } else { | |
| 612 // Get memory managers for a given memory pool | |
| 613 for (int i = 0; i < num_mgrs; i++) { | |
| 614 MemoryManager* mgr = pool->get_memory_manager(i); | |
| 615 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
| 616 instanceHandle ph(THREAD, p); | |
| 617 mgrArray->obj_at_put(i, ph()); | |
| 618 } | |
| 619 } | |
| 620 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); | |
| 621 JVM_END | |
| 622 | |
| 623 | |
| 624 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 625 // of a given memory pool. | |
| 626 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
| 627 ResourceMark rm(THREAD); | |
| 628 | |
| 629 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 630 if (pool != NULL) { | |
| 631 MemoryUsage usage = pool->get_memory_usage(); | |
| 632 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 633 return JNIHandles::make_local(env, h()); | |
| 634 } else { | |
| 635 return NULL; | |
| 636 } | |
| 637 JVM_END | |
| 638 | |
| 639 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 640 // of a given memory pool. | |
| 641 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
| 642 ResourceMark rm(THREAD); | |
| 643 | |
| 644 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 645 if (pool != NULL) { | |
| 646 MemoryUsage usage = pool->get_peak_memory_usage(); | |
| 647 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 648 return JNIHandles::make_local(env, h()); | |
| 649 } else { | |
| 650 return NULL; | |
| 651 } | |
| 652 JVM_END | |
| 653 | |
| 654 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 655 // of a given memory pool after most recent GC. | |
| 656 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) | |
| 657 ResourceMark rm(THREAD); | |
| 658 | |
| 659 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 660 if (pool != NULL && pool->is_collected_pool()) { | |
| 661 MemoryUsage usage = pool->get_last_collection_usage(); | |
| 662 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 663 return JNIHandles::make_local(env, h()); | |
| 664 } else { | |
| 665 return NULL; | |
| 666 } | |
| 667 JVM_END | |
| 668 | |
| 669 // Sets the memory pool sensor for a threshold type | |
| 670 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) | |
| 671 if (obj == NULL || sensorObj == NULL) { | |
| 672 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 673 } | |
| 674 | |
| 675 klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK); | |
| 676 oop s = JNIHandles::resolve(sensorObj); | |
| 677 assert(s->is_instance(), "Sensor should be an instanceOop"); | |
| 678 instanceHandle sensor_h(THREAD, (instanceOop) s); | |
| 679 if (!sensor_h->is_a(sensor_klass)) { | |
| 680 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 681 "Sensor is not an instance of sun.management.Sensor class"); | |
| 682 } | |
| 683 | |
| 684 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); | |
| 685 assert(mpool != NULL, "MemoryPool should exist"); | |
| 686 | |
| 687 switch (type) { | |
| 688 case JMM_USAGE_THRESHOLD_HIGH: | |
| 689 case JMM_USAGE_THRESHOLD_LOW: | |
| 690 // have only one sensor for threshold high and low | |
| 691 mpool->set_usage_sensor_obj(sensor_h); | |
| 692 break; | |
| 693 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
| 694 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
| 695 // have only one sensor for threshold high and low | |
| 696 mpool->set_gc_usage_sensor_obj(sensor_h); | |
| 697 break; | |
| 698 default: | |
| 699 assert(false, "Unrecognized type"); | |
| 700 } | |
| 701 | |
| 702 JVM_END | |
| 703 | |
| 704 | |
| 705 // Sets the threshold of a given memory pool. | |
| 706 // Returns the previous threshold. | |
| 707 // | |
| 708 // Input parameters: | |
| 709 // pool - the MemoryPoolMXBean object | |
| 710 // type - threshold type | |
| 711 // threshold - the new threshold (must not be negative) | |
| 712 // | |
| 713 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) | |
| 714 if (threshold < 0) { | |
| 715 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 716 "Invalid threshold value", | |
| 717 -1); | |
| 718 } | |
| 719 | |
|
489
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720 if ((size_t)threshold > max_uintx) { |
|
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721 stringStream st; |
|
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722 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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723 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); |
| 0 | 724 } |
| 725 | |
| 726 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); | |
| 727 assert(pool != NULL, "MemoryPool should exist"); | |
| 728 | |
| 729 jlong prev = 0; | |
| 730 switch (type) { | |
| 731 case JMM_USAGE_THRESHOLD_HIGH: | |
| 732 if (!pool->usage_threshold()->is_high_threshold_supported()) { | |
| 733 return -1; | |
| 734 } | |
| 735 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); | |
| 736 break; | |
| 737 | |
| 738 case JMM_USAGE_THRESHOLD_LOW: | |
| 739 if (!pool->usage_threshold()->is_low_threshold_supported()) { | |
| 740 return -1; | |
| 741 } | |
| 742 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); | |
| 743 break; | |
| 744 | |
| 745 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
| 746 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { | |
| 747 return -1; | |
| 748 } | |
| 749 // return and the new threshold is effective for the next GC | |
| 750 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); | |
| 751 | |
| 752 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
| 753 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { | |
| 754 return -1; | |
| 755 } | |
| 756 // return and the new threshold is effective for the next GC | |
| 757 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); | |
| 758 | |
| 759 default: | |
| 760 assert(false, "Unrecognized type"); | |
| 761 return -1; | |
| 762 } | |
| 763 | |
| 764 // When the threshold is changed, reevaluate if the low memory | |
| 765 // detection is enabled. | |
| 766 if (prev != threshold) { | |
| 767 LowMemoryDetector::recompute_enabled_for_collected_pools(); | |
| 768 LowMemoryDetector::detect_low_memory(pool); | |
| 769 } | |
| 770 return prev; | |
| 771 JVM_END | |
| 772 | |
| 773 // Returns a java/lang/management/MemoryUsage object representing | |
| 774 // the memory usage for the heap or non-heap memory. | |
| 775 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) | |
| 776 ResourceMark rm(THREAD); | |
| 777 | |
| 778 // Calculate the memory usage | |
| 779 size_t total_init = 0; | |
| 780 size_t total_used = 0; | |
| 781 size_t total_committed = 0; | |
| 782 size_t total_max = 0; | |
| 783 bool has_undefined_init_size = false; | |
| 784 bool has_undefined_max_size = false; | |
| 785 | |
| 786 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { | |
| 787 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
| 788 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { | |
| 789 MemoryUsage u = pool->get_memory_usage(); | |
| 790 total_used += u.used(); | |
| 791 total_committed += u.committed(); | |
| 792 | |
| 793 // if any one of the memory pool has undefined init_size or max_size, | |
| 794 // set it to -1 | |
| 795 if (u.init_size() == (size_t)-1) { | |
| 796 has_undefined_init_size = true; | |
| 797 } | |
| 798 if (!has_undefined_init_size) { | |
| 799 total_init += u.init_size(); | |
| 800 } | |
| 801 | |
| 802 if (u.max_size() == (size_t)-1) { | |
| 803 has_undefined_max_size = true; | |
| 804 } | |
| 805 if (!has_undefined_max_size) { | |
| 806 total_max += u.max_size(); | |
| 807 } | |
| 808 } | |
| 809 } | |
| 810 | |
|
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811 // In our current implementation, we make sure that all non-heap |
|
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812 // pools have defined init and max sizes. Heap pools do not matter, |
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813 // as we never use total_init and total_max for them. |
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814 assert(heap || !has_undefined_init_size, "Undefined init size"); |
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815 assert(heap || !has_undefined_max_size, "Undefined max size"); |
| 0 | 816 |
| 1064 | 817 MemoryUsage usage((heap ? InitialHeapSize : total_init), |
| 0 | 818 total_used, |
| 819 total_committed, | |
| 820 (heap ? Universe::heap()->max_capacity() : total_max)); | |
| 821 | |
| 822 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 823 return JNIHandles::make_local(env, obj()); | |
| 824 JVM_END | |
| 825 | |
| 826 // Returns the boolean value of a given attribute. | |
| 827 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) | |
| 828 switch (att) { | |
| 829 case JMM_VERBOSE_GC: | |
| 830 return MemoryService::get_verbose(); | |
| 831 case JMM_VERBOSE_CLASS: | |
| 832 return ClassLoadingService::get_verbose(); | |
| 833 case JMM_THREAD_CONTENTION_MONITORING: | |
| 834 return ThreadService::is_thread_monitoring_contention(); | |
| 835 case JMM_THREAD_CPU_TIME: | |
| 836 return ThreadService::is_thread_cpu_time_enabled(); | |
| 837 default: | |
| 838 assert(0, "Unrecognized attribute"); | |
| 839 return false; | |
| 840 } | |
| 841 JVM_END | |
| 842 | |
| 843 // Sets the given boolean attribute and returns the previous value. | |
| 844 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) | |
| 845 switch (att) { | |
| 846 case JMM_VERBOSE_GC: | |
| 847 return MemoryService::set_verbose(flag != 0); | |
| 848 case JMM_VERBOSE_CLASS: | |
| 849 return ClassLoadingService::set_verbose(flag != 0); | |
| 850 case JMM_THREAD_CONTENTION_MONITORING: | |
| 851 return ThreadService::set_thread_monitoring_contention(flag != 0); | |
| 852 case JMM_THREAD_CPU_TIME: | |
| 853 return ThreadService::set_thread_cpu_time_enabled(flag != 0); | |
| 854 default: | |
| 855 assert(0, "Unrecognized attribute"); | |
| 856 return false; | |
| 857 } | |
| 858 JVM_END | |
| 859 | |
| 860 | |
| 861 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { | |
| 862 switch (att) { | |
| 863 case JMM_GC_TIME_MS: | |
| 864 return mgr->gc_time_ms(); | |
| 865 | |
| 866 case JMM_GC_COUNT: | |
| 867 return mgr->gc_count(); | |
| 868 | |
| 869 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: | |
| 870 // current implementation only has 1 ext attribute | |
| 871 return 1; | |
| 872 | |
| 873 default: | |
| 874 assert(0, "Unrecognized GC attribute"); | |
| 875 return -1; | |
| 876 } | |
| 877 } | |
| 878 | |
| 879 class VmThreadCountClosure: public ThreadClosure { | |
| 880 private: | |
| 881 int _count; | |
| 882 public: | |
| 883 VmThreadCountClosure() : _count(0) {}; | |
| 884 void do_thread(Thread* thread); | |
| 885 int count() { return _count; } | |
| 886 }; | |
| 887 | |
| 888 void VmThreadCountClosure::do_thread(Thread* thread) { | |
| 889 // exclude externally visible JavaThreads | |
| 890 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
| 891 return; | |
| 892 } | |
| 893 | |
| 894 _count++; | |
| 895 } | |
| 896 | |
| 897 static jint get_vm_thread_count() { | |
| 898 VmThreadCountClosure vmtcc; | |
| 899 { | |
| 900 MutexLockerEx ml(Threads_lock); | |
| 901 Threads::threads_do(&vmtcc); | |
| 902 } | |
| 903 | |
| 904 return vmtcc.count(); | |
| 905 } | |
| 906 | |
| 907 static jint get_num_flags() { | |
| 908 // last flag entry is always NULL, so subtract 1 | |
| 909 int nFlags = (int) Flag::numFlags - 1; | |
| 910 int count = 0; | |
| 911 for (int i = 0; i < nFlags; i++) { | |
| 912 Flag* flag = &Flag::flags[i]; | |
| 350 | 913 // Exclude the locked (diagnostic, experimental) flags |
| 0 | 914 if (flag->is_unlocked() || flag->is_unlocker()) { |
| 915 count++; | |
| 916 } | |
| 917 } | |
| 918 return count; | |
| 919 } | |
| 920 | |
| 921 static jlong get_long_attribute(jmmLongAttribute att) { | |
| 922 switch (att) { | |
| 923 case JMM_CLASS_LOADED_COUNT: | |
| 924 return ClassLoadingService::loaded_class_count(); | |
| 925 | |
| 926 case JMM_CLASS_UNLOADED_COUNT: | |
| 927 return ClassLoadingService::unloaded_class_count(); | |
| 928 | |
| 929 case JMM_THREAD_TOTAL_COUNT: | |
| 930 return ThreadService::get_total_thread_count(); | |
| 931 | |
| 932 case JMM_THREAD_LIVE_COUNT: | |
| 933 return ThreadService::get_live_thread_count(); | |
| 934 | |
| 935 case JMM_THREAD_PEAK_COUNT: | |
| 936 return ThreadService::get_peak_thread_count(); | |
| 937 | |
| 938 case JMM_THREAD_DAEMON_COUNT: | |
| 939 return ThreadService::get_daemon_thread_count(); | |
| 940 | |
| 941 case JMM_JVM_INIT_DONE_TIME_MS: | |
| 942 return Management::vm_init_done_time(); | |
| 943 | |
| 944 case JMM_COMPILE_TOTAL_TIME_MS: | |
| 945 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); | |
| 946 | |
| 947 case JMM_OS_PROCESS_ID: | |
| 948 return os::current_process_id(); | |
| 949 | |
| 950 // Hotspot-specific counters | |
| 951 case JMM_CLASS_LOADED_BYTES: | |
| 952 return ClassLoadingService::loaded_class_bytes(); | |
| 953 | |
| 954 case JMM_CLASS_UNLOADED_BYTES: | |
| 955 return ClassLoadingService::unloaded_class_bytes(); | |
| 956 | |
| 957 case JMM_SHARED_CLASS_LOADED_COUNT: | |
| 958 return ClassLoadingService::loaded_shared_class_count(); | |
| 959 | |
| 960 case JMM_SHARED_CLASS_UNLOADED_COUNT: | |
| 961 return ClassLoadingService::unloaded_shared_class_count(); | |
| 962 | |
| 963 | |
| 964 case JMM_SHARED_CLASS_LOADED_BYTES: | |
| 965 return ClassLoadingService::loaded_shared_class_bytes(); | |
| 966 | |
| 967 case JMM_SHARED_CLASS_UNLOADED_BYTES: | |
| 968 return ClassLoadingService::unloaded_shared_class_bytes(); | |
| 969 | |
| 970 case JMM_TOTAL_CLASSLOAD_TIME_MS: | |
| 971 return ClassLoader::classloader_time_ms(); | |
| 972 | |
| 973 case JMM_VM_GLOBAL_COUNT: | |
| 974 return get_num_flags(); | |
| 975 | |
| 976 case JMM_SAFEPOINT_COUNT: | |
| 977 return RuntimeService::safepoint_count(); | |
| 978 | |
| 979 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: | |
| 980 return RuntimeService::safepoint_sync_time_ms(); | |
| 981 | |
| 982 case JMM_TOTAL_STOPPED_TIME_MS: | |
| 983 return RuntimeService::safepoint_time_ms(); | |
| 984 | |
| 985 case JMM_TOTAL_APP_TIME_MS: | |
| 986 return RuntimeService::application_time_ms(); | |
| 987 | |
| 988 case JMM_VM_THREAD_COUNT: | |
| 989 return get_vm_thread_count(); | |
| 990 | |
| 991 case JMM_CLASS_INIT_TOTAL_COUNT: | |
| 992 return ClassLoader::class_init_count(); | |
| 993 | |
| 994 case JMM_CLASS_INIT_TOTAL_TIME_MS: | |
| 995 return ClassLoader::class_init_time_ms(); | |
| 996 | |
| 997 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: | |
| 998 return ClassLoader::class_verify_time_ms(); | |
| 999 | |
| 1000 case JMM_METHOD_DATA_SIZE_BYTES: | |
| 1001 return ClassLoadingService::class_method_data_size(); | |
| 1002 | |
| 1003 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: | |
| 1004 return os::physical_memory(); | |
| 1005 | |
| 1006 default: | |
| 1007 return -1; | |
| 1008 } | |
| 1009 } | |
| 1010 | |
| 1011 | |
| 1012 // Returns the long value of a given attribute. | |
| 1013 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) | |
| 1014 if (obj == NULL) { | |
| 1015 return get_long_attribute(att); | |
| 1016 } else { | |
| 1017 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); | |
| 1018 if (mgr != NULL) { | |
| 1019 return get_gc_attribute(mgr, att); | |
| 1020 } | |
| 1021 } | |
| 1022 return -1; | |
| 1023 JVM_END | |
| 1024 | |
| 1025 // Gets the value of all attributes specified in the given array | |
| 1026 // and sets the value in the result array. | |
| 1027 // Returns the number of attributes found. | |
| 1028 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, | |
| 1029 jobject obj, | |
| 1030 jmmLongAttribute* atts, | |
| 1031 jint count, | |
| 1032 jlong* result)) | |
| 1033 | |
| 1034 int num_atts = 0; | |
| 1035 if (obj == NULL) { | |
| 1036 for (int i = 0; i < count; i++) { | |
| 1037 result[i] = get_long_attribute(atts[i]); | |
| 1038 if (result[i] != -1) { | |
| 1039 num_atts++; | |
| 1040 } | |
| 1041 } | |
| 1042 } else { | |
| 1043 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); | |
| 1044 for (int i = 0; i < count; i++) { | |
| 1045 result[i] = get_gc_attribute(mgr, atts[i]); | |
| 1046 if (result[i] != -1) { | |
| 1047 num_atts++; | |
| 1048 } | |
| 1049 } | |
| 1050 } | |
| 1051 return num_atts; | |
| 1052 JVM_END | |
| 1053 | |
| 1054 // Helper function to do thread dump for a specific list of threads | |
| 1055 static void do_thread_dump(ThreadDumpResult* dump_result, | |
| 1056 typeArrayHandle ids_ah, // array of thread ID (long[]) | |
| 1057 int num_threads, | |
| 1058 int max_depth, | |
| 1059 bool with_locked_monitors, | |
| 1060 bool with_locked_synchronizers, | |
| 1061 TRAPS) { | |
| 1062 | |
| 1063 // First get an array of threadObj handles. | |
| 1064 // A JavaThread may terminate before we get the stack trace. | |
| 1065 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
| 1066 { | |
| 1067 MutexLockerEx ml(Threads_lock); | |
| 1068 for (int i = 0; i < num_threads; i++) { | |
| 1069 jlong tid = ids_ah->long_at(i); | |
| 1070 JavaThread* jt = find_java_thread_from_id(tid); | |
| 1071 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); | |
| 1072 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); | |
| 1073 thread_handle_array->append(threadObj_h); | |
| 1074 } | |
| 1075 } | |
| 1076 | |
| 1077 // Obtain thread dumps and thread snapshot information | |
| 1078 VM_ThreadDump op(dump_result, | |
| 1079 thread_handle_array, | |
| 1080 num_threads, | |
| 1081 max_depth, /* stack depth */ | |
| 1082 with_locked_monitors, | |
| 1083 with_locked_synchronizers); | |
| 1084 VMThread::execute(&op); | |
| 1085 } | |
| 1086 | |
| 1087 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo | |
| 1088 // for the thread ID specified in the corresponding entry in | |
| 1089 // the given array of thread IDs; or NULL if the thread does not exist | |
| 1090 // or has terminated. | |
| 1091 // | |
| 1092 // Input parameters: | |
| 1093 // ids - array of thread IDs | |
| 1094 // maxDepth - the maximum depth of stack traces to be dumped: | |
| 1095 // maxDepth == -1 requests to dump entire stack trace. | |
| 1096 // maxDepth == 0 requests no stack trace. | |
| 1097 // infoArray - array of ThreadInfo objects | |
| 1098 // | |
| 1099 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) | |
| 1100 // Check if threads is null | |
| 1101 if (ids == NULL || infoArray == NULL) { | |
| 1102 THROW_(vmSymbols::java_lang_NullPointerException(), -1); | |
| 1103 } | |
| 1104 | |
| 1105 if (maxDepth < -1) { | |
| 1106 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1107 "Invalid maxDepth", -1); | |
| 1108 } | |
| 1109 | |
| 1110 ResourceMark rm(THREAD); | |
| 1111 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); | |
| 1112 typeArrayHandle ids_ah(THREAD, ta); | |
| 1113 | |
| 1114 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); | |
| 1115 objArrayOop oa = objArrayOop(infoArray_obj); | |
| 1116 objArrayHandle infoArray_h(THREAD, oa); | |
| 1117 | |
| 1118 // validate the thread id array | |
| 1119 validate_thread_id_array(ids_ah, CHECK_0); | |
| 1120 | |
| 1121 // validate the ThreadInfo[] parameters | |
| 1122 validate_thread_info_array(infoArray_h, CHECK_0); | |
| 1123 | |
| 1124 // infoArray must be of the same length as the given array of thread IDs | |
| 1125 int num_threads = ids_ah->length(); | |
| 1126 if (num_threads != infoArray_h->length()) { | |
| 1127 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1128 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); | |
| 1129 } | |
| 1130 | |
| 1131 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 1132 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
| 1133 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); | |
| 1134 } | |
| 1135 | |
| 1136 // Must use ThreadDumpResult to store the ThreadSnapshot. | |
| 1137 // GC may occur after the thread snapshots are taken but before | |
| 1138 // this function returns. The threadObj and other oops kept | |
| 1139 // in the ThreadSnapshot are marked and adjusted during GC. | |
| 1140 ThreadDumpResult dump_result(num_threads); | |
| 1141 | |
| 1142 if (maxDepth == 0) { | |
| 1143 // no stack trace dumped - do not need to stop the world | |
| 1144 { | |
| 1145 MutexLockerEx ml(Threads_lock); | |
| 1146 for (int i = 0; i < num_threads; i++) { | |
| 1147 jlong tid = ids_ah->long_at(i); | |
| 1148 JavaThread* jt = find_java_thread_from_id(tid); | |
| 1149 ThreadSnapshot* ts; | |
| 1150 if (jt == NULL) { | |
| 1151 // if the thread does not exist or now it is terminated, | |
| 1152 // create dummy snapshot | |
| 1153 ts = new ThreadSnapshot(); | |
| 1154 } else { | |
| 1155 ts = new ThreadSnapshot(jt); | |
| 1156 } | |
| 1157 dump_result.add_thread_snapshot(ts); | |
| 1158 } | |
| 1159 } | |
| 1160 } else { | |
| 1161 // obtain thread dump with the specific list of threads with stack trace | |
| 1162 | |
| 1163 do_thread_dump(&dump_result, | |
| 1164 ids_ah, | |
| 1165 num_threads, | |
| 1166 maxDepth, | |
| 1167 false, /* no locked monitor */ | |
| 1168 false, /* no locked synchronizers */ | |
| 1169 CHECK_0); | |
| 1170 } | |
| 1171 | |
| 1172 int num_snapshots = dump_result.num_snapshots(); | |
| 1173 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); | |
| 1174 int index = 0; | |
| 1175 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { | |
| 1176 // For each thread, create an java/lang/management/ThreadInfo object | |
| 1177 // and fill with the thread information | |
| 1178 | |
| 1179 if (ts->threadObj() == NULL) { | |
| 1180 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
| 1181 infoArray_h->obj_at_put(index, NULL); | |
| 1182 continue; | |
| 1183 } | |
| 1184 | |
| 1185 // Create java.lang.management.ThreadInfo object | |
| 1186 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); | |
| 1187 infoArray_h->obj_at_put(index, info_obj); | |
| 1188 } | |
| 1189 return 0; | |
| 1190 JVM_END | |
| 1191 | |
| 1192 // Dump thread info for the specified threads. | |
| 1193 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo | |
| 1194 // for the thread ID specified in the corresponding entry in | |
| 1195 // the given array of thread IDs; or NULL if the thread does not exist | |
| 1196 // or has terminated. | |
| 1197 // | |
| 1198 // Input parameter: | |
| 1199 // ids - array of thread IDs; NULL indicates all live threads | |
| 1200 // locked_monitors - if true, dump locked object monitors | |
| 1201 // locked_synchronizers - if true, dump locked JSR-166 synchronizers | |
| 1202 // | |
| 1203 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) | |
| 1204 ResourceMark rm(THREAD); | |
| 1205 | |
| 1206 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 1207 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
| 1208 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); | |
| 1209 } | |
| 1210 | |
| 1211 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); | |
| 1212 int num_threads = (ta != NULL ? ta->length() : 0); | |
| 1213 typeArrayHandle ids_ah(THREAD, ta); | |
| 1214 | |
| 1215 ThreadDumpResult dump_result(num_threads); // can safepoint | |
| 1216 | |
| 1217 if (ids_ah() != NULL) { | |
| 1218 | |
| 1219 // validate the thread id array | |
| 1220 validate_thread_id_array(ids_ah, CHECK_NULL); | |
| 1221 | |
| 1222 // obtain thread dump of a specific list of threads | |
| 1223 do_thread_dump(&dump_result, | |
| 1224 ids_ah, | |
| 1225 num_threads, | |
| 1226 -1, /* entire stack */ | |
| 1227 (locked_monitors ? true : false), /* with locked monitors */ | |
| 1228 (locked_synchronizers ? true : false), /* with locked synchronizers */ | |
| 1229 CHECK_NULL); | |
| 1230 } else { | |
| 1231 // obtain thread dump of all threads | |
| 1232 VM_ThreadDump op(&dump_result, | |
| 1233 -1, /* entire stack */ | |
| 1234 (locked_monitors ? true : false), /* with locked monitors */ | |
| 1235 (locked_synchronizers ? true : false) /* with locked synchronizers */); | |
| 1236 VMThread::execute(&op); | |
| 1237 } | |
| 1238 | |
| 1239 int num_snapshots = dump_result.num_snapshots(); | |
| 1240 | |
| 1241 // create the result ThreadInfo[] object | |
| 1242 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 1243 instanceKlassHandle ik (THREAD, k); | |
| 1244 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); | |
| 1245 objArrayHandle result_h(THREAD, r); | |
| 1246 | |
| 1247 int index = 0; | |
| 1248 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { | |
| 1249 if (ts->threadObj() == NULL) { | |
| 1250 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
| 1251 result_h->obj_at_put(index, NULL); | |
| 1252 continue; | |
| 1253 } | |
| 1254 | |
| 1255 | |
| 1256 | |
| 1257 ThreadStackTrace* stacktrace = ts->get_stack_trace(); | |
| 1258 assert(stacktrace != NULL, "Must have a stack trace dumped"); | |
| 1259 | |
| 1260 // Create Object[] filled with locked monitors | |
| 1261 // Create int[] filled with the stack depth where a monitor was locked | |
| 1262 int num_frames = stacktrace->get_stack_depth(); | |
| 1263 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); | |
| 1264 | |
| 1265 // Count the total number of locked monitors | |
| 1266 for (int i = 0; i < num_frames; i++) { | |
| 1267 StackFrameInfo* frame = stacktrace->stack_frame_at(i); | |
| 1268 num_locked_monitors += frame->num_locked_monitors(); | |
| 1269 } | |
| 1270 | |
| 1271 objArrayHandle monitors_array; | |
| 1272 typeArrayHandle depths_array; | |
| 1273 objArrayHandle synchronizers_array; | |
| 1274 | |
| 1275 if (locked_monitors) { | |
| 1276 // Constructs Object[] and int[] to contain the object monitor and the stack depth | |
| 1277 // where the thread locked it | |
| 1278 objArrayOop array = oopFactory::new_system_objArray(num_locked_monitors, CHECK_NULL); | |
| 1279 objArrayHandle mh(THREAD, array); | |
| 1280 monitors_array = mh; | |
| 1281 | |
| 1282 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); | |
| 1283 typeArrayHandle dh(THREAD, tarray); | |
| 1284 depths_array = dh; | |
| 1285 | |
| 1286 int count = 0; | |
| 1287 int j = 0; | |
| 1288 for (int depth = 0; depth < num_frames; depth++) { | |
| 1289 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); | |
| 1290 int len = frame->num_locked_monitors(); | |
| 1291 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); | |
| 1292 for (j = 0; j < len; j++) { | |
| 1293 oop monitor = locked_monitors->at(j); | |
| 1294 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); | |
| 1295 monitors_array->obj_at_put(count, monitor); | |
| 1296 depths_array->int_at_put(count, depth); | |
| 1297 count++; | |
| 1298 } | |
| 1299 } | |
| 1300 | |
| 1301 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); | |
| 1302 for (j = 0; j < jni_locked_monitors->length(); j++) { | |
| 1303 oop object = jni_locked_monitors->at(j); | |
| 1304 assert(object != NULL && object->is_instance(), "must be a Java object"); | |
| 1305 monitors_array->obj_at_put(count, object); | |
| 1306 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info | |
| 1307 depths_array->int_at_put(count, -1); | |
| 1308 count++; | |
| 1309 } | |
| 1310 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); | |
| 1311 } | |
| 1312 | |
| 1313 if (locked_synchronizers) { | |
| 1314 // Create Object[] filled with locked JSR-166 synchronizers | |
| 1315 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); | |
| 1316 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); | |
| 1317 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); | |
| 1318 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); | |
| 1319 | |
| 1320 objArrayOop array = oopFactory::new_system_objArray(num_locked_synchronizers, CHECK_NULL); | |
| 1321 objArrayHandle sh(THREAD, array); | |
| 1322 synchronizers_array = sh; | |
| 1323 | |
| 1324 for (int k = 0; k < num_locked_synchronizers; k++) { | |
| 1325 synchronizers_array->obj_at_put(k, locks->at(k)); | |
| 1326 } | |
| 1327 } | |
| 1328 | |
| 1329 // Create java.lang.management.ThreadInfo object | |
| 1330 instanceOop info_obj = Management::create_thread_info_instance(ts, | |
| 1331 monitors_array, | |
| 1332 depths_array, | |
| 1333 synchronizers_array, | |
| 1334 CHECK_NULL); | |
| 1335 result_h->obj_at_put(index, info_obj); | |
| 1336 } | |
| 1337 | |
| 1338 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
| 1339 JVM_END | |
| 1340 | |
| 1341 // Returns an array of Class objects. | |
| 1342 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) | |
| 1343 ResourceMark rm(THREAD); | |
| 1344 | |
| 1345 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter | |
| 1346 | |
| 1347 int num_classes = lce.num_loaded_classes(); | |
| 1142 | 1348 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); |
| 0 | 1349 objArrayHandle classes_ah(THREAD, r); |
| 1350 | |
| 1351 for (int i = 0; i < num_classes; i++) { | |
| 1352 KlassHandle kh = lce.get_klass(i); | |
| 1353 oop mirror = Klass::cast(kh())->java_mirror(); | |
| 1354 classes_ah->obj_at_put(i, mirror); | |
| 1355 } | |
| 1356 | |
| 1357 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); | |
| 1358 JVM_END | |
| 1359 | |
| 1360 // Reset statistic. Return true if the requested statistic is reset. | |
| 1361 // Otherwise, return false. | |
| 1362 // | |
| 1363 // Input parameters: | |
| 1364 // obj - specify which instance the statistic associated with to be reset | |
| 1365 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. | |
| 1366 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. | |
| 1367 // type - the type of statistic to be reset | |
| 1368 // | |
| 1369 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) | |
| 1370 ResourceMark rm(THREAD); | |
| 1371 | |
| 1372 switch (type) { | |
| 1373 case JMM_STAT_PEAK_THREAD_COUNT: | |
| 1374 ThreadService::reset_peak_thread_count(); | |
| 1375 return true; | |
| 1376 | |
| 1377 case JMM_STAT_THREAD_CONTENTION_COUNT: | |
| 1378 case JMM_STAT_THREAD_CONTENTION_TIME: { | |
| 1379 jlong tid = obj.j; | |
| 1380 if (tid < 0) { | |
| 1381 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); | |
| 1382 } | |
| 1383 | |
| 1384 // Look for the JavaThread of this given tid | |
| 1385 MutexLockerEx ml(Threads_lock); | |
| 1386 if (tid == 0) { | |
| 1387 // reset contention statistics for all threads if tid == 0 | |
| 1388 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { | |
| 1389 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
| 1390 ThreadService::reset_contention_count_stat(java_thread); | |
| 1391 } else { | |
| 1392 ThreadService::reset_contention_time_stat(java_thread); | |
| 1393 } | |
| 1394 } | |
| 1395 } else { | |
| 1396 // reset contention statistics for a given thread | |
| 1397 JavaThread* java_thread = find_java_thread_from_id(tid); | |
| 1398 if (java_thread == NULL) { | |
| 1399 return false; | |
| 1400 } | |
| 1401 | |
| 1402 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
| 1403 ThreadService::reset_contention_count_stat(java_thread); | |
| 1404 } else { | |
| 1405 ThreadService::reset_contention_time_stat(java_thread); | |
| 1406 } | |
| 1407 } | |
| 1408 return true; | |
| 1409 break; | |
| 1410 } | |
| 1411 case JMM_STAT_PEAK_POOL_USAGE: { | |
| 1412 jobject o = obj.l; | |
| 1413 if (o == NULL) { | |
| 1414 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1415 } | |
| 1416 | |
| 1417 oop pool_obj = JNIHandles::resolve(o); | |
| 1418 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
| 1419 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
| 1420 | |
| 1421 MemoryPool* pool = MemoryService::get_memory_pool(ph); | |
| 1422 if (pool != NULL) { | |
| 1423 pool->reset_peak_memory_usage(); | |
| 1424 return true; | |
| 1425 } | |
| 1426 break; | |
| 1427 } | |
| 1428 case JMM_STAT_GC_STAT: { | |
| 1429 jobject o = obj.l; | |
| 1430 if (o == NULL) { | |
| 1431 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1432 } | |
| 1433 | |
| 1434 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); | |
| 1435 if (mgr != NULL) { | |
| 1436 mgr->reset_gc_stat(); | |
| 1437 return true; | |
| 1438 } | |
| 1439 break; | |
| 1440 } | |
| 1441 default: | |
| 1442 assert(0, "Unknown Statistic Type"); | |
| 1443 } | |
| 1444 return false; | |
| 1445 JVM_END | |
| 1446 | |
| 1447 // Returns the fast estimate of CPU time consumed by | |
| 1448 // a given thread (in nanoseconds). | |
| 1449 // If thread_id == 0, return CPU time for the current thread. | |
| 1450 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) | |
| 1451 if (!os::is_thread_cpu_time_supported()) { | |
| 1452 return -1; | |
| 1453 } | |
| 1454 | |
| 1455 if (thread_id < 0) { | |
| 1456 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1457 "Invalid thread ID", -1); | |
| 1458 } | |
| 1459 | |
| 1460 JavaThread* java_thread = NULL; | |
| 1461 if (thread_id == 0) { | |
| 1462 // current thread | |
| 1463 return os::current_thread_cpu_time(); | |
| 1464 } else { | |
| 1465 MutexLockerEx ml(Threads_lock); | |
| 1466 java_thread = find_java_thread_from_id(thread_id); | |
| 1467 if (java_thread != NULL) { | |
| 1468 return os::thread_cpu_time((Thread*) java_thread); | |
| 1469 } | |
| 1470 } | |
| 1471 return -1; | |
| 1472 JVM_END | |
| 1473 | |
| 1474 // Returns the CPU time consumed by a given thread (in nanoseconds). | |
| 1475 // If thread_id == 0, CPU time for the current thread is returned. | |
| 1476 // If user_sys_cpu_time = true, user level and system CPU time of | |
| 1477 // a given thread is returned; otherwise, only user level CPU time | |
| 1478 // is returned. | |
| 1479 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) | |
| 1480 if (!os::is_thread_cpu_time_supported()) { | |
| 1481 return -1; | |
| 1482 } | |
| 1483 | |
| 1484 if (thread_id < 0) { | |
| 1485 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1486 "Invalid thread ID", -1); | |
| 1487 } | |
| 1488 | |
| 1489 JavaThread* java_thread = NULL; | |
| 1490 if (thread_id == 0) { | |
| 1491 // current thread | |
| 1492 return os::current_thread_cpu_time(user_sys_cpu_time != 0); | |
| 1493 } else { | |
| 1494 MutexLockerEx ml(Threads_lock); | |
| 1495 java_thread = find_java_thread_from_id(thread_id); | |
| 1496 if (java_thread != NULL) { | |
| 1497 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); | |
| 1498 } | |
| 1499 } | |
| 1500 return -1; | |
| 1501 JVM_END | |
| 1502 | |
| 1503 // Returns a String array of all VM global flag names | |
| 1504 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) | |
| 1505 // last flag entry is always NULL, so subtract 1 | |
| 1506 int nFlags = (int) Flag::numFlags - 1; | |
| 1507 // allocate a temp array | |
| 1142 | 1508 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 0 | 1509 nFlags, CHECK_0); |
| 1510 objArrayHandle flags_ah(THREAD, r); | |
| 1511 int num_entries = 0; | |
| 1512 for (int i = 0; i < nFlags; i++) { | |
| 1513 Flag* flag = &Flag::flags[i]; | |
| 350 | 1514 // Exclude the locked (experimental, diagnostic) flags |
| 0 | 1515 if (flag->is_unlocked() || flag->is_unlocker()) { |
| 1516 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); | |
| 1517 flags_ah->obj_at_put(num_entries, s()); | |
| 1518 num_entries++; | |
| 1519 } | |
| 1520 } | |
| 1521 | |
| 1522 if (num_entries < nFlags) { | |
| 1523 // Return array of right length | |
| 1142 | 1524 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); |
| 0 | 1525 for(int i = 0; i < num_entries; i++) { |
| 1526 res->obj_at_put(i, flags_ah->obj_at(i)); | |
| 1527 } | |
| 1528 return (jobjectArray)JNIHandles::make_local(env, res); | |
| 1529 } | |
| 1530 | |
| 1531 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); | |
| 1532 JVM_END | |
| 1533 | |
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1534 // Utility function used by jmm_GetVMGlobals. Returns false if flag type |
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1535 // can't be determined, true otherwise. If false is returned, then *global |
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1536 // will be incomplete and invalid. |
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1537 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { |
| 0 | 1538 Handle flag_name; |
| 1539 if (name() == NULL) { | |
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1540 flag_name = java_lang_String::create_from_str(flag->name, CHECK_false); |
| 0 | 1541 } else { |
| 1542 flag_name = name; | |
| 1543 } | |
| 1544 global->name = (jstring)JNIHandles::make_local(env, flag_name()); | |
| 1545 | |
| 1546 if (flag->is_bool()) { | |
| 1547 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; | |
| 1548 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; | |
| 1549 } else if (flag->is_intx()) { | |
| 1550 global->value.j = (jlong)flag->get_intx(); | |
| 1551 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
| 1552 } else if (flag->is_uintx()) { | |
| 1553 global->value.j = (jlong)flag->get_uintx(); | |
| 1554 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
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1555 } else if (flag->is_uint64_t()) { |
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1556 global->value.j = (jlong)flag->get_uint64_t(); |
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1557 global->type = JMM_VMGLOBAL_TYPE_JLONG; |
| 0 | 1558 } else if (flag->is_ccstr()) { |
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1559 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); |
| 0 | 1560 global->value.l = (jobject)JNIHandles::make_local(env, str()); |
| 1561 global->type = JMM_VMGLOBAL_TYPE_JSTRING; | |
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1562 } else { |
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1563 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; |
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1564 return false; |
| 0 | 1565 } |
| 1566 | |
| 1567 global->writeable = flag->is_writeable(); | |
| 1568 global->external = flag->is_external(); | |
| 1569 switch (flag->origin) { | |
| 1570 case DEFAULT: | |
| 1571 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; | |
| 1572 break; | |
| 1573 case COMMAND_LINE: | |
| 1574 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; | |
| 1575 break; | |
| 1576 case ENVIRON_VAR: | |
| 1577 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; | |
| 1578 break; | |
| 1579 case CONFIG_FILE: | |
| 1580 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; | |
| 1581 break; | |
| 1582 case MANAGEMENT: | |
| 1583 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; | |
| 1584 break; | |
| 1585 case ERGONOMIC: | |
| 1586 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; | |
| 1587 break; | |
| 1588 default: | |
| 1589 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; | |
| 1590 } | |
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1591 |
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1592 return true; |
| 0 | 1593 } |
| 1594 | |
| 1595 // Fill globals array of count length with jmmVMGlobal entries | |
| 1596 // specified by names. If names == NULL, fill globals array | |
| 1597 // with all Flags. Return value is number of entries | |
| 1598 // created in globals. | |
| 1599 // If a Flag with a given name in an array element does not | |
| 1600 // exist, globals[i].name will be set to NULL. | |
| 1601 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, | |
| 1602 jobjectArray names, | |
| 1603 jmmVMGlobal *globals, | |
| 1604 jint count)) | |
| 1605 | |
| 1606 | |
| 1607 if (globals == NULL) { | |
| 1608 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1609 } | |
| 1610 | |
| 1611 ResourceMark rm(THREAD); | |
| 1612 | |
| 1613 if (names != NULL) { | |
| 1614 // return the requested globals | |
| 1615 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); | |
| 1616 objArrayHandle names_ah(THREAD, ta); | |
| 1617 // Make sure we have a String array | |
| 1618 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
| 1142 | 1619 if (element_klass != SystemDictionary::String_klass()) { |
| 0 | 1620 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| 1621 "Array element type is not String class", 0); | |
| 1622 } | |
| 1623 | |
| 1624 int names_length = names_ah->length(); | |
| 1625 int num_entries = 0; | |
| 1626 for (int i = 0; i < names_length && i < count; i++) { | |
| 1627 oop s = names_ah->obj_at(i); | |
| 1628 if (s == NULL) { | |
| 1629 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1630 } | |
| 1631 | |
| 1632 Handle sh(THREAD, s); | |
| 1633 char* str = java_lang_String::as_utf8_string(s); | |
| 1634 Flag* flag = Flag::find_flag(str, strlen(str)); | |
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1635 if (flag != NULL && |
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1636 add_global_entry(env, sh, &globals[i], flag, THREAD)) { |
| 0 | 1637 num_entries++; |
| 1638 } else { | |
| 1639 globals[i].name = NULL; | |
| 1640 } | |
| 1641 } | |
| 1642 return num_entries; | |
| 1643 } else { | |
| 1644 // return all globals if names == NULL | |
| 1645 | |
| 1646 // last flag entry is always NULL, so subtract 1 | |
| 1647 int nFlags = (int) Flag::numFlags - 1; | |
| 1648 Handle null_h; | |
| 1649 int num_entries = 0; | |
| 1650 for (int i = 0; i < nFlags && num_entries < count; i++) { | |
| 1651 Flag* flag = &Flag::flags[i]; | |
| 350 | 1652 // Exclude the locked (diagnostic, experimental) flags |
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1653 if ((flag->is_unlocked() || flag->is_unlocker()) && |
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1654 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { |
| 0 | 1655 num_entries++; |
| 1656 } | |
| 1657 } | |
| 1658 return num_entries; | |
| 1659 } | |
| 1660 JVM_END | |
| 1661 | |
| 1662 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) | |
| 1663 ResourceMark rm(THREAD); | |
| 1664 | |
| 1665 oop fn = JNIHandles::resolve_external_guard(flag_name); | |
| 1666 if (fn == NULL) { | |
| 1667 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 1668 "The flag name cannot be null."); | |
| 1669 } | |
| 1670 char* name = java_lang_String::as_utf8_string(fn); | |
| 1671 Flag* flag = Flag::find_flag(name, strlen(name)); | |
| 1672 if (flag == NULL) { | |
| 1673 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1674 "Flag does not exist."); | |
| 1675 } | |
| 1676 if (!flag->is_writeable()) { | |
| 1677 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1678 "This flag is not writeable."); | |
| 1679 } | |
| 1680 | |
| 1681 bool succeed; | |
| 1682 if (flag->is_bool()) { | |
| 1683 bool bvalue = (new_value.z == JNI_TRUE ? true : false); | |
| 1684 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); | |
| 1685 } else if (flag->is_intx()) { | |
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1686 intx ivalue = (intx)new_value.j; |
| 0 | 1687 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); |
| 1688 } else if (flag->is_uintx()) { | |
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1689 uintx uvalue = (uintx)new_value.j; |
| 0 | 1690 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); |
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1691 } else if (flag->is_uint64_t()) { |
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1692 uint64_t uvalue = (uint64_t)new_value.j; |
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1693 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT); |
| 0 | 1694 } else if (flag->is_ccstr()) { |
| 1695 oop str = JNIHandles::resolve_external_guard(new_value.l); | |
| 1696 if (str == NULL) { | |
| 1697 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1698 } | |
| 1699 ccstr svalue = java_lang_String::as_utf8_string(str); | |
| 1700 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); | |
| 1701 } | |
| 1702 assert(succeed, "Setting flag should succeed"); | |
| 1703 JVM_END | |
| 1704 | |
| 1705 class ThreadTimesClosure: public ThreadClosure { | |
| 1706 private: | |
| 1707 objArrayOop _names; | |
| 1708 typeArrayOop _times; | |
| 1709 int _names_len; | |
| 1710 int _times_len; | |
| 1711 int _count; | |
| 1712 | |
| 1713 public: | |
| 1714 ThreadTimesClosure(objArrayOop names, typeArrayOop times); | |
| 1715 virtual void do_thread(Thread* thread); | |
| 1716 int count() { return _count; } | |
| 1717 }; | |
| 1718 | |
| 1719 ThreadTimesClosure::ThreadTimesClosure(objArrayOop names, | |
| 1720 typeArrayOop times) { | |
| 1721 assert(names != NULL, "names was NULL"); | |
| 1722 assert(times != NULL, "times was NULL"); | |
| 1723 _names = names; | |
| 1724 _names_len = names->length(); | |
| 1725 _times = times; | |
| 1726 _times_len = times->length(); | |
| 1727 _count = 0; | |
| 1728 } | |
| 1729 | |
| 1730 void ThreadTimesClosure::do_thread(Thread* thread) { | |
| 1731 Handle s; | |
| 1732 assert(thread != NULL, "thread was NULL"); | |
| 1733 | |
| 1734 // exclude externally visible JavaThreads | |
| 1735 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
| 1736 return; | |
| 1737 } | |
| 1738 | |
| 1739 if (_count >= _names_len || _count >= _times_len) { | |
| 1740 // skip if the result array is not big enough | |
| 1741 return; | |
| 1742 } | |
| 1743 | |
| 1744 EXCEPTION_MARK; | |
| 1745 | |
| 1746 assert(thread->name() != NULL, "All threads should have a name"); | |
| 1747 s = java_lang_String::create_from_str(thread->name(), CHECK); | |
| 1748 _names->obj_at_put(_count, s()); | |
| 1749 | |
| 1750 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? | |
| 1751 os::thread_cpu_time(thread) : -1); | |
| 1752 _count++; | |
| 1753 } | |
| 1754 | |
| 1755 // Fills names with VM internal thread names and times with the corresponding | |
| 1756 // CPU times. If names or times is NULL, a NullPointerException is thrown. | |
| 1757 // If the element type of names is not String, an IllegalArgumentException is | |
| 1758 // thrown. | |
| 1759 // If an array is not large enough to hold all the entries, only the entries | |
| 1760 // that fit will be returned. Return value is the number of VM internal | |
| 1761 // threads entries. | |
| 1762 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, | |
| 1763 jobjectArray names, | |
| 1764 jlongArray times)) | |
| 1765 if (names == NULL || times == NULL) { | |
| 1766 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1767 } | |
| 1768 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); | |
| 1769 objArrayHandle names_ah(THREAD, na); | |
| 1770 | |
| 1771 // Make sure we have a String array | |
| 1772 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
| 1142 | 1773 if (element_klass != SystemDictionary::String_klass()) { |
| 0 | 1774 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| 1775 "Array element type is not String class", 0); | |
| 1776 } | |
| 1777 | |
| 1778 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); | |
| 1779 typeArrayHandle times_ah(THREAD, ta); | |
| 1780 | |
| 1781 ThreadTimesClosure ttc(names_ah(), times_ah()); | |
| 1782 { | |
| 1783 MutexLockerEx ml(Threads_lock); | |
| 1784 Threads::threads_do(&ttc); | |
| 1785 } | |
| 1786 | |
| 1787 return ttc.count(); | |
| 1788 JVM_END | |
| 1789 | |
| 1790 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { | |
| 1791 ResourceMark rm(THREAD); | |
| 1792 | |
| 1793 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); | |
| 1794 VMThread::execute(&op); | |
| 1795 | |
| 1796 DeadlockCycle* deadlocks = op.result(); | |
| 1797 if (deadlocks == NULL) { | |
| 1798 // no deadlock found and return | |
| 1799 return Handle(); | |
| 1800 } | |
| 1801 | |
| 1802 int num_threads = 0; | |
| 1803 DeadlockCycle* cycle; | |
| 1804 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 1805 num_threads += cycle->num_threads(); | |
| 1806 } | |
| 1807 | |
| 1142 | 1808 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); |
| 0 | 1809 objArrayHandle threads_ah(THREAD, r); |
| 1810 | |
| 1811 int index = 0; | |
| 1812 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 1813 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); | |
| 1814 int len = deadlock_threads->length(); | |
| 1815 for (int i = 0; i < len; i++) { | |
| 1816 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); | |
| 1817 index++; | |
| 1818 } | |
| 1819 } | |
| 1820 return threads_ah; | |
| 1821 } | |
| 1822 | |
| 1823 // Finds cycles of threads that are deadlocked involved in object monitors | |
| 1824 // and JSR-166 synchronizers. | |
| 1825 // Returns an array of Thread objects which are in deadlock, if any. | |
| 1826 // Otherwise, returns NULL. | |
| 1827 // | |
| 1828 // Input parameter: | |
| 1829 // object_monitors_only - if true, only check object monitors | |
| 1830 // | |
| 1831 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) | |
| 1832 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); | |
| 1833 return (jobjectArray) JNIHandles::make_local(env, result()); | |
| 1834 JVM_END | |
| 1835 | |
| 1836 // Finds cycles of threads that are deadlocked on monitor locks | |
| 1837 // Returns an array of Thread objects which are in deadlock, if any. | |
| 1838 // Otherwise, returns NULL. | |
| 1839 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) | |
| 1840 Handle result = find_deadlocks(true, CHECK_0); | |
| 1841 return (jobjectArray) JNIHandles::make_local(env, result()); | |
| 1842 JVM_END | |
| 1843 | |
| 1844 // Gets the information about GC extension attributes including | |
| 1845 // the name of the attribute, its type, and a short description. | |
| 1846 // | |
| 1847 // Input parameters: | |
| 1848 // mgr - GC memory manager | |
| 1849 // info - caller allocated array of jmmExtAttributeInfo | |
| 1850 // count - number of elements of the info array | |
| 1851 // | |
| 1852 // Returns the number of GC extension attributes filled in the info array; or | |
| 1853 // -1 if info is not big enough | |
| 1854 // | |
| 1855 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) | |
| 1856 // All GC memory managers have 1 attribute (number of GC threads) | |
| 1857 if (count == 0) { | |
| 1858 return 0; | |
| 1859 } | |
| 1860 | |
| 1861 if (info == NULL) { | |
| 1862 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1863 } | |
| 1864 | |
| 1865 info[0].name = "GcThreadCount"; | |
| 1866 info[0].type = 'I'; | |
| 1867 info[0].description = "Number of GC threads"; | |
| 1868 return 1; | |
| 1869 JVM_END | |
| 1870 | |
| 1871 // verify the given array is an array of java/lang/management/MemoryUsage objects | |
| 1872 // of a given length and return the objArrayOop | |
| 1873 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { | |
| 1874 if (array == NULL) { | |
| 1875 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1876 } | |
| 1877 | |
| 1878 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 1879 objArrayHandle array_h(THREAD, oa); | |
| 1880 | |
| 1881 // array must be of the given length | |
| 1882 if (length != array_h->length()) { | |
| 1883 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1884 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); | |
| 1885 } | |
| 1886 | |
| 1887 // check if the element of array is of type MemoryUsage class | |
| 1888 klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); | |
| 1889 klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass(); | |
| 1890 if (element_klass != usage_klass) { | |
| 1891 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1892 "The element type is not MemoryUsage class", 0); | |
| 1893 } | |
| 1894 | |
| 1895 return array_h(); | |
| 1896 } | |
| 1897 | |
| 1898 // Gets the statistics of the last GC of a given GC memory manager. | |
| 1899 // Input parameters: | |
| 1900 // obj - GarbageCollectorMXBean object | |
| 1901 // gc_stat - caller allocated jmmGCStat where: | |
| 1902 // a. before_gc_usage - array of MemoryUsage objects | |
| 1903 // b. after_gc_usage - array of MemoryUsage objects | |
| 1904 // c. gc_ext_attributes_values_size is set to the | |
| 1905 // gc_ext_attribute_values array allocated | |
| 1906 // d. gc_ext_attribute_values is a caller allocated array of jvalue. | |
| 1907 // | |
| 1908 // On return, | |
| 1909 // gc_index == 0 indicates no GC statistics available | |
| 1910 // | |
| 1911 // before_gc_usage and after_gc_usage - filled with per memory pool | |
| 1912 // before and after GC usage in the same order as the memory pools | |
| 1913 // returned by GetMemoryPools for a given GC memory manager. | |
| 1914 // num_gc_ext_attributes indicates the number of elements in | |
| 1915 // the gc_ext_attribute_values array is filled; or | |
| 1916 // -1 if the gc_ext_attributes_values array is not big enough | |
| 1917 // | |
| 1918 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) | |
| 1919 ResourceMark rm(THREAD); | |
| 1920 | |
| 1921 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { | |
| 1922 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1923 } | |
| 1924 | |
| 1925 // Get the GCMemoryManager | |
| 1926 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); | |
| 1927 | |
| 1928 // Make a copy of the last GC statistics | |
| 1929 // GC may occur while constructing the last GC information | |
| 1930 int num_pools = MemoryService::num_memory_pools(); | |
| 1931 GCStatInfo* stat = new GCStatInfo(num_pools); | |
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1932 if (mgr->get_last_gc_stat(stat) == 0) { |
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1933 gc_stat->gc_index = 0; |
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1934 return; |
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1935 } |
| 0 | 1936 |
| 1937 gc_stat->gc_index = stat->gc_index(); | |
| 1938 gc_stat->start_time = Management::ticks_to_ms(stat->start_time()); | |
| 1939 gc_stat->end_time = Management::ticks_to_ms(stat->end_time()); | |
| 1940 | |
| 1941 // Current implementation does not have GC extension attributes | |
| 1942 gc_stat->num_gc_ext_attributes = 0; | |
| 1943 | |
| 1944 // Fill the arrays of MemoryUsage objects with before and after GC | |
| 1945 // per pool memory usage | |
| 1946 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, | |
| 1947 num_pools, | |
| 1948 CHECK); | |
| 1949 objArrayHandle usage_before_gc_ah(THREAD, bu); | |
| 1950 | |
| 1951 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, | |
| 1952 num_pools, | |
| 1953 CHECK); | |
| 1954 objArrayHandle usage_after_gc_ah(THREAD, au); | |
| 1955 | |
| 1956 for (int i = 0; i < num_pools; i++) { | |
| 1957 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK); | |
| 1958 Handle after_usage; | |
| 1959 | |
| 1960 MemoryUsage u = stat->after_gc_usage_for_pool(i); | |
| 1961 if (u.max_size() == 0 && u.used() > 0) { | |
| 1962 // If max size == 0, this pool is a survivor space. | |
| 1963 // Set max size = -1 since the pools will be swapped after GC. | |
| 1964 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); | |
| 1965 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); | |
| 1966 } else { | |
| 1967 after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK); | |
| 1968 } | |
| 1969 usage_before_gc_ah->obj_at_put(i, before_usage()); | |
| 1970 usage_after_gc_ah->obj_at_put(i, after_usage()); | |
| 1971 } | |
| 1972 | |
| 1973 if (gc_stat->gc_ext_attribute_values_size > 0) { | |
| 1974 // Current implementation only has 1 attribute (number of GC threads) | |
| 1975 // The type is 'I' | |
| 1976 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); | |
| 1977 } | |
| 1978 JVM_END | |
| 1979 | |
| 1980 // Dump heap - Returns 0 if succeeds. | |
| 1981 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) | |
| 1982 #ifndef SERVICES_KERNEL | |
| 1983 ResourceMark rm(THREAD); | |
| 1984 oop on = JNIHandles::resolve_external_guard(outputfile); | |
| 1985 if (on == NULL) { | |
| 1986 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
| 1987 "Output file name cannot be null.", -1); | |
| 1988 } | |
| 1989 char* name = java_lang_String::as_utf8_string(on); | |
| 1990 if (name == NULL) { | |
| 1991 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
| 1992 "Output file name cannot be null.", -1); | |
| 1993 } | |
| 1994 HeapDumper dumper(live ? true : false); | |
| 1995 if (dumper.dump(name) != 0) { | |
| 1996 const char* errmsg = dumper.error_as_C_string(); | |
| 1997 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); | |
| 1998 } | |
| 1999 return 0; | |
| 2000 #else // SERVICES_KERNEL | |
| 2001 return -1; | |
| 2002 #endif // SERVICES_KERNEL | |
| 2003 JVM_END | |
| 2004 | |
| 2005 jlong Management::ticks_to_ms(jlong ticks) { | |
| 2006 assert(os::elapsed_frequency() > 0, "Must be non-zero"); | |
| 2007 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) | |
| 2008 * (double)1000.0); | |
| 2009 } | |
| 2010 | |
| 2011 const struct jmmInterface_1_ jmm_interface = { | |
| 2012 NULL, | |
| 2013 NULL, | |
| 2014 jmm_GetVersion, | |
| 2015 jmm_GetOptionalSupport, | |
| 2016 jmm_GetInputArguments, | |
| 2017 jmm_GetThreadInfo, | |
| 2018 jmm_GetInputArgumentArray, | |
| 2019 jmm_GetMemoryPools, | |
| 2020 jmm_GetMemoryManagers, | |
| 2021 jmm_GetMemoryPoolUsage, | |
| 2022 jmm_GetPeakMemoryPoolUsage, | |
| 2023 NULL, | |
| 2024 jmm_GetMemoryUsage, | |
| 2025 jmm_GetLongAttribute, | |
| 2026 jmm_GetBoolAttribute, | |
| 2027 jmm_SetBoolAttribute, | |
| 2028 jmm_GetLongAttributes, | |
| 2029 jmm_FindMonitorDeadlockedThreads, | |
| 2030 jmm_GetThreadCpuTime, | |
| 2031 jmm_GetVMGlobalNames, | |
| 2032 jmm_GetVMGlobals, | |
| 2033 jmm_GetInternalThreadTimes, | |
| 2034 jmm_ResetStatistic, | |
| 2035 jmm_SetPoolSensor, | |
| 2036 jmm_SetPoolThreshold, | |
| 2037 jmm_GetPoolCollectionUsage, | |
| 2038 jmm_GetGCExtAttributeInfo, | |
| 2039 jmm_GetLastGCStat, | |
| 2040 jmm_GetThreadCpuTimeWithKind, | |
| 2041 NULL, | |
| 2042 jmm_DumpHeap0, | |
| 2043 jmm_FindDeadlockedThreads, | |
| 2044 jmm_SetVMGlobal, | |
| 2045 NULL, | |
| 2046 jmm_DumpThreads | |
| 2047 }; | |
| 2048 | |
| 2049 void* Management::get_jmm_interface(int version) { | |
| 2050 if (version == JMM_VERSION_1_0) { | |
| 2051 return (void*) &jmm_interface; | |
| 2052 } | |
| 2053 return NULL; | |
| 2054 } |