1 /* 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 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/objArrayKlass.hpp" 33 #include "oops/oop.inline.hpp" 34 #include "runtime/arguments.hpp" 35 #include "runtime/globals.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 "runtime/serviceThread.hpp" 42 #include "services/classLoadingService.hpp" 43 #include "services/diagnosticCommand.hpp" 44 #include "services/diagnosticFramework.hpp" 45 #include "services/heapDumper.hpp" 46 #include "services/jmm.h" 47 #include "services/lowMemoryDetector.hpp" 48 #include "services/gcNotifier.hpp" 49 #include "services/nmtDCmd.hpp" 50 #include "services/management.hpp" 51 #include "services/memoryManager.hpp" 52 #include "services/memoryPool.hpp" 53 #include "services/memoryService.hpp" 54 #include "services/runtimeService.hpp" 55 #include "services/threadService.hpp" 56 #include "utilities/macros.hpp" 57 58 PerfVariable* Management::_begin_vm_creation_time = NULL; 59 PerfVariable* Management::_end_vm_creation_time = NULL; 60 PerfVariable* Management::_vm_init_done_time = NULL; 61 62 Klass* Management::_sensor_klass = NULL; 63 Klass* Management::_threadInfo_klass = NULL; 64 Klass* Management::_memoryUsage_klass = NULL; 65 Klass* Management::_memoryPoolMXBean_klass = NULL; 66 Klass* Management::_memoryManagerMXBean_klass = NULL; 67 Klass* Management::_garbageCollectorMXBean_klass = NULL; 68 Klass* Management::_managementFactory_klass = NULL; 69 Klass* Management::_garbageCollectorImpl_klass = NULL; 70 Klass* Management::_gcInfo_klass = NULL; 71 Klass* Management::_diagnosticCommandImpl_klass = NULL; 72 Klass* Management::_managementFactoryHelper_klass = NULL; 73 74 75 jmmOptionalSupport Management::_optional_support = {0}; 76 TimeStamp Management::_stamp; 77 78 void management_init() { 79 #if INCLUDE_MANAGEMENT 80 Management::init(); 81 ThreadService::init(); 82 RuntimeService::init(); 83 ClassLoadingService::init(); 84 #else 85 ThreadService::init(); 86 // Make sure the VM version is initialized 87 // This is normally called by RuntimeService::init(). 88 // Since that is conditionalized out, we need to call it here. 89 Abstract_VM_Version::initialize(); 90 #endif // INCLUDE_MANAGEMENT 91 } 92 93 #if INCLUDE_MANAGEMENT 94 95 void Management::init() { 96 EXCEPTION_MARK; 97 98 // These counters are for java.lang.management API support. 99 // They are created even if -XX:-UsePerfData is set and in 100 // that case, they will be allocated on C heap. 101 102 _begin_vm_creation_time = 103 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", 104 PerfData::U_None, CHECK); 105 106 _end_vm_creation_time = 107 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", 108 PerfData::U_None, CHECK); 109 110 _vm_init_done_time = 111 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", 112 PerfData::U_None, CHECK); 113 114 // Initialize optional support 115 _optional_support.isLowMemoryDetectionSupported = 1; 116 _optional_support.isCompilationTimeMonitoringSupported = 1; 117 _optional_support.isThreadContentionMonitoringSupported = 1; 118 119 if (os::is_thread_cpu_time_supported()) { 120 _optional_support.isCurrentThreadCpuTimeSupported = 1; 121 _optional_support.isOtherThreadCpuTimeSupported = 1; 122 } else { 123 _optional_support.isCurrentThreadCpuTimeSupported = 0; 124 _optional_support.isOtherThreadCpuTimeSupported = 0; 125 } 126 127 _optional_support.isBootClassPathSupported = 1; 128 _optional_support.isObjectMonitorUsageSupported = 1; 129 #if INCLUDE_SERVICES 130 // This depends on the heap inspector 131 _optional_support.isSynchronizerUsageSupported = 1; 132 #endif // INCLUDE_SERVICES 133 _optional_support.isThreadAllocatedMemorySupported = 1; 134 _optional_support.isRemoteDiagnosticCommandsSupported = 1; 135 136 // Registration of the diagnostic commands 137 DCmdRegistrant::register_dcmds(); 138 DCmdRegistrant::register_dcmds_ext(); 139 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 140 | DCmd_Source_MBean; 141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 142 } 143 144 void Management::initialize(TRAPS) { 145 // Start the service thread 146 ServiceThread::initialize(); 147 148 if (ManagementServer) { 149 ResourceMark rm(THREAD); 150 HandleMark hm(THREAD); 151 152 // Load and initialize the sun.management.Agent class 153 // invoke startAgent method to start the management server 154 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 155 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), 156 loader, 157 Handle(), 158 true, 159 CHECK); 160 instanceKlassHandle ik (THREAD, k); 161 162 JavaValue result(T_VOID); 163 JavaCalls::call_static(&result, 164 ik, 165 vmSymbols::startAgent_name(), 166 vmSymbols::void_method_signature(), 167 CHECK); 168 } 169 } 170 171 void Management::get_optional_support(jmmOptionalSupport* support) { 172 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); 173 } 174 175 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) { 176 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); 177 instanceKlassHandle ik (THREAD, k); 178 if (ik->should_be_initialized()) { 179 ik->initialize(CHECK_NULL); 180 } 181 // If these classes change to not be owned by the boot loader, they need 182 // to be walked to keep their class loader alive in oops_do. 183 assert(ik->class_loader() == NULL, "need to follow in oops_do"); 184 return ik(); 185 } 186 187 void Management::record_vm_startup_time(jlong begin, jlong duration) { 188 // if the performance counter is not initialized, 189 // then vm initialization failed; simply return. 190 if (_begin_vm_creation_time == NULL) return; 191 192 _begin_vm_creation_time->set_value(begin); 193 _end_vm_creation_time->set_value(begin + duration); 194 PerfMemory::set_accessible(true); 195 } 196 197 jlong Management::timestamp() { 198 TimeStamp t; 199 t.update(); 200 return t.ticks() - _stamp.ticks(); 201 } 202 203 void Management::oops_do(OopClosure* f) { 204 MemoryService::oops_do(f); 205 ThreadService::oops_do(f); 206 } 207 208 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) { 209 if (_threadInfo_klass == NULL) { 210 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); 211 } 212 return _threadInfo_klass; 213 } 214 215 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) { 216 if (_memoryUsage_klass == NULL) { 217 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); 218 } 219 return _memoryUsage_klass; 220 } 221 222 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { 223 if (_memoryPoolMXBean_klass == NULL) { 224 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); 225 } 226 return _memoryPoolMXBean_klass; 227 } 228 229 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { 230 if (_memoryManagerMXBean_klass == NULL) { 231 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); 232 } 233 return _memoryManagerMXBean_klass; 234 } 235 236 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { 237 if (_garbageCollectorMXBean_klass == NULL) { 238 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); 239 } 240 return _garbageCollectorMXBean_klass; 241 } 242 243 Klass* Management::sun_management_Sensor_klass(TRAPS) { 244 if (_sensor_klass == NULL) { 245 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); 246 } 247 return _sensor_klass; 248 } 249 250 Klass* Management::sun_management_ManagementFactory_klass(TRAPS) { 251 if (_managementFactory_klass == NULL) { 252 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); 253 } 254 return _managementFactory_klass; 255 } 256 257 Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { 258 if (_garbageCollectorImpl_klass == NULL) { 259 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); 260 } 261 return _garbageCollectorImpl_klass; 262 } 263 264 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) { 265 if (_gcInfo_klass == NULL) { 266 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); 267 } 268 return _gcInfo_klass; 269 } 270 271 Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) { 272 if (_diagnosticCommandImpl_klass == NULL) { 273 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL); 274 } 275 return _diagnosticCommandImpl_klass; 276 } 277 278 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) { 279 if (_managementFactoryHelper_klass == NULL) { 280 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL); 281 } 282 return _managementFactoryHelper_klass; 283 } 284 285 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { 286 Handle snapshot_thread(THREAD, snapshot->threadObj()); 287 288 jlong contended_time; 289 jlong waited_time; 290 if (ThreadService::is_thread_monitoring_contention()) { 291 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); 292 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); 293 } else { 294 // set them to -1 if thread contention monitoring is disabled. 295 contended_time = max_julong; 296 waited_time = max_julong; 297 } 298 299 int thread_status = snapshot->thread_status(); 300 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); 301 if (snapshot->is_ext_suspended()) { 302 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; 303 } 304 if (snapshot->is_in_native()) { 305 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; 306 } 307 308 ThreadStackTrace* st = snapshot->get_stack_trace(); 309 Handle stacktrace_h; 310 if (st != NULL) { 311 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); 312 } else { 313 stacktrace_h = Handle(); 314 } 315 316 args->push_oop(snapshot_thread); 317 args->push_int(thread_status); 318 args->push_oop(Handle(THREAD, snapshot->blocker_object())); 319 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); 320 args->push_long(snapshot->contended_enter_count()); 321 args->push_long(contended_time); 322 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); 323 args->push_long(waited_time); 324 args->push_oop(stacktrace_h); 325 } 326 327 // Helper function to construct a ThreadInfo object 328 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { 329 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 330 instanceKlassHandle ik (THREAD, k); 331 332 JavaValue result(T_VOID); 333 JavaCallArguments args(14); 334 335 // First allocate a ThreadObj object and 336 // push the receiver as the first argument 337 Handle element = ik->allocate_instance_handle(CHECK_NULL); 338 args.push_oop(element); 339 340 // initialize the arguments for the ThreadInfo constructor 341 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 342 343 // Call ThreadInfo constructor with no locked monitors and synchronizers 344 JavaCalls::call_special(&result, 345 ik, 346 vmSymbols::object_initializer_name(), 347 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), 348 &args, 349 CHECK_NULL); 350 351 return (instanceOop) element(); 352 } 353 354 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, 355 objArrayHandle monitors_array, 356 typeArrayHandle depths_array, 357 objArrayHandle synchronizers_array, 358 TRAPS) { 359 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 360 instanceKlassHandle ik (THREAD, k); 361 362 JavaValue result(T_VOID); 363 JavaCallArguments args(17); 364 365 // First allocate a ThreadObj object and 366 // push the receiver as the first argument 367 Handle element = ik->allocate_instance_handle(CHECK_NULL); 368 args.push_oop(element); 369 370 // initialize the arguments for the ThreadInfo constructor 371 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 372 373 // push the locked monitors and synchronizers in the arguments 374 args.push_oop(monitors_array); 375 args.push_oop(depths_array); 376 args.push_oop(synchronizers_array); 377 378 // Call ThreadInfo constructor with locked monitors and synchronizers 379 JavaCalls::call_special(&result, 380 ik, 381 vmSymbols::object_initializer_name(), 382 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), 383 &args, 384 CHECK_NULL); 385 386 return (instanceOop) element(); 387 } 388 389 // Helper functions 390 static JavaThread* find_java_thread_from_id(jlong thread_id) { 391 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); 392 393 JavaThread* java_thread = NULL; 394 // Sequential search for now. Need to do better optimization later. 395 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { 396 oop tobj = thread->threadObj(); 397 if (!thread->is_exiting() && 398 tobj != NULL && 399 thread_id == java_lang_Thread::thread_id(tobj)) { 400 java_thread = thread; 401 break; 402 } 403 } 404 return java_thread; 405 } 406 407 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { 408 if (mgr == NULL) { 409 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 410 } 411 oop mgr_obj = JNIHandles::resolve(mgr); 412 instanceHandle h(THREAD, (instanceOop) mgr_obj); 413 414 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); 415 if (!h->is_a(k)) { 416 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 417 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", 418 NULL); 419 } 420 421 MemoryManager* gc = MemoryService::get_memory_manager(h); 422 if (gc == NULL || !gc->is_gc_memory_manager()) { 423 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 424 "Invalid GC memory manager", 425 NULL); 426 } 427 return (GCMemoryManager*) gc; 428 } 429 430 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { 431 if (obj == NULL) { 432 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 433 } 434 435 oop pool_obj = JNIHandles::resolve(obj); 436 assert(pool_obj->is_instance(), "Should be an instanceOop"); 437 instanceHandle ph(THREAD, (instanceOop) pool_obj); 438 439 return MemoryService::get_memory_pool(ph); 440 } 441 442 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { 443 int num_threads = ids_ah->length(); 444 445 // Validate input thread IDs 446 int i = 0; 447 for (i = 0; i < num_threads; i++) { 448 jlong tid = ids_ah->long_at(i); 449 if (tid <= 0) { 450 // throw exception if invalid thread id. 451 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 452 "Invalid thread ID entry"); 453 } 454 } 455 } 456 457 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { 458 // check if the element of infoArray is of type ThreadInfo class 459 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); 460 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass(); 461 if (element_klass != threadinfo_klass) { 462 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 463 "infoArray element type is not ThreadInfo class"); 464 } 465 } 466 467 468 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { 469 if (obj == NULL) { 470 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 471 } 472 473 oop mgr_obj = JNIHandles::resolve(obj); 474 assert(mgr_obj->is_instance(), "Should be an instanceOop"); 475 instanceHandle mh(THREAD, (instanceOop) mgr_obj); 476 477 return MemoryService::get_memory_manager(mh); 478 } 479 480 // Returns a version string and sets major and minor version if 481 // the input parameters are non-null. 482 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) 483 return JMM_VERSION; 484 JVM_END 485 486 // Gets the list of VM monitoring and management optional supports 487 // Returns 0 if succeeded; otherwise returns non-zero. 488 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) 489 if (support == NULL) { 490 return -1; 491 } 492 Management::get_optional_support(support); 493 return 0; 494 JVM_END 495 496 // Returns a java.lang.String object containing the input arguments to the VM. 497 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) 498 ResourceMark rm(THREAD); 499 500 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 501 return NULL; 502 } 503 504 char** vm_flags = Arguments::jvm_flags_array(); 505 char** vm_args = Arguments::jvm_args_array(); 506 int num_flags = Arguments::num_jvm_flags(); 507 int num_args = Arguments::num_jvm_args(); 508 509 size_t length = 1; // null terminator 510 int i; 511 for (i = 0; i < num_flags; i++) { 512 length += strlen(vm_flags[i]); 513 } 514 for (i = 0; i < num_args; i++) { 515 length += strlen(vm_args[i]); 516 } 517 // add a space between each argument 518 length += num_flags + num_args - 1; 519 520 // Return the list of input arguments passed to the VM 521 // and preserve the order that the VM processes. 522 char* args = NEW_RESOURCE_ARRAY(char, length); 523 args[0] = '\0'; 524 // concatenate all jvm_flags 525 if (num_flags > 0) { 526 strcat(args, vm_flags[0]); 527 for (i = 1; i < num_flags; i++) { 528 strcat(args, " "); 529 strcat(args, vm_flags[i]); 530 } 531 } 532 533 if (num_args > 0 && num_flags > 0) { 534 // append a space if args already contains one or more jvm_flags 535 strcat(args, " "); 536 } 537 538 // concatenate all jvm_args 539 if (num_args > 0) { 540 strcat(args, vm_args[0]); 541 for (i = 1; i < num_args; i++) { 542 strcat(args, " "); 543 strcat(args, vm_args[i]); 544 } 545 } 546 547 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); 548 return JNIHandles::make_local(env, hargs()); 549 JVM_END 550 551 // Returns an array of java.lang.String object containing the input arguments to the VM. 552 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) 553 ResourceMark rm(THREAD); 554 555 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 556 return NULL; 557 } 558 559 char** vm_flags = Arguments::jvm_flags_array(); 560 char** vm_args = Arguments::jvm_args_array(); 561 int num_flags = Arguments::num_jvm_flags(); 562 int num_args = Arguments::num_jvm_args(); 563 564 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); 565 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); 566 objArrayHandle result_h(THREAD, r); 567 568 int index = 0; 569 for (int j = 0; j < num_flags; j++, index++) { 570 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 571 result_h->obj_at_put(index, h()); 572 } 573 for (int i = 0; i < num_args; i++, index++) { 574 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 575 result_h->obj_at_put(index, h()); 576 } 577 return (jobjectArray) JNIHandles::make_local(env, result_h()); 578 JVM_END 579 580 // Returns an array of java/lang/management/MemoryPoolMXBean object 581 // one for each memory pool if obj == null; otherwise returns 582 // an array of memory pools for a given memory manager if 583 // it is a valid memory manager. 584 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) 585 ResourceMark rm(THREAD); 586 587 int num_memory_pools; 588 MemoryManager* mgr = NULL; 589 if (obj == NULL) { 590 num_memory_pools = MemoryService::num_memory_pools(); 591 } else { 592 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); 593 if (mgr == NULL) { 594 return NULL; 595 } 596 num_memory_pools = mgr->num_memory_pools(); 597 } 598 599 // Allocate the resulting MemoryPoolMXBean[] object 600 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); 601 instanceKlassHandle ik (THREAD, k); 602 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); 603 objArrayHandle poolArray(THREAD, r); 604 605 if (mgr == NULL) { 606 // Get all memory pools 607 for (int i = 0; i < num_memory_pools; i++) { 608 MemoryPool* pool = MemoryService::get_memory_pool(i); 609 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 610 instanceHandle ph(THREAD, p); 611 poolArray->obj_at_put(i, ph()); 612 } 613 } else { 614 // Get memory pools managed by a given memory manager 615 for (int i = 0; i < num_memory_pools; i++) { 616 MemoryPool* pool = mgr->get_memory_pool(i); 617 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 618 instanceHandle ph(THREAD, p); 619 poolArray->obj_at_put(i, ph()); 620 } 621 } 622 return (jobjectArray) JNIHandles::make_local(env, poolArray()); 623 JVM_END 624 625 // Returns an array of java/lang/management/MemoryManagerMXBean object 626 // one for each memory manager if obj == null; otherwise returns 627 // an array of memory managers for a given memory pool if 628 // it is a valid memory pool. 629 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) 630 ResourceMark rm(THREAD); 631 632 int num_mgrs; 633 MemoryPool* pool = NULL; 634 if (obj == NULL) { 635 num_mgrs = MemoryService::num_memory_managers(); 636 } else { 637 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 638 if (pool == NULL) { 639 return NULL; 640 } 641 num_mgrs = pool->num_memory_managers(); 642 } 643 644 // Allocate the resulting MemoryManagerMXBean[] object 645 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); 646 instanceKlassHandle ik (THREAD, k); 647 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); 648 objArrayHandle mgrArray(THREAD, r); 649 650 if (pool == NULL) { 651 // Get all memory managers 652 for (int i = 0; i < num_mgrs; i++) { 653 MemoryManager* mgr = MemoryService::get_memory_manager(i); 654 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 655 instanceHandle ph(THREAD, p); 656 mgrArray->obj_at_put(i, ph()); 657 } 658 } else { 659 // Get memory managers for a given memory pool 660 for (int i = 0; i < num_mgrs; i++) { 661 MemoryManager* mgr = pool->get_memory_manager(i); 662 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 663 instanceHandle ph(THREAD, p); 664 mgrArray->obj_at_put(i, ph()); 665 } 666 } 667 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); 668 JVM_END 669 670 671 // Returns a java/lang/management/MemoryUsage object containing the memory usage 672 // of a given memory pool. 673 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) 674 ResourceMark rm(THREAD); 675 676 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 677 if (pool != NULL) { 678 MemoryUsage usage = pool->get_memory_usage(); 679 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 680 return JNIHandles::make_local(env, h()); 681 } else { 682 return NULL; 683 } 684 JVM_END 685 686 // Returns a java/lang/management/MemoryUsage object containing the memory usage 687 // of a given memory pool. 688 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) 689 ResourceMark rm(THREAD); 690 691 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 692 if (pool != NULL) { 693 MemoryUsage usage = pool->get_peak_memory_usage(); 694 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 695 return JNIHandles::make_local(env, h()); 696 } else { 697 return NULL; 698 } 699 JVM_END 700 701 // Returns a java/lang/management/MemoryUsage object containing the memory usage 702 // of a given memory pool after most recent GC. 703 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) 704 ResourceMark rm(THREAD); 705 706 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 707 if (pool != NULL && pool->is_collected_pool()) { 708 MemoryUsage usage = pool->get_last_collection_usage(); 709 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 710 return JNIHandles::make_local(env, h()); 711 } else { 712 return NULL; 713 } 714 JVM_END 715 716 // Sets the memory pool sensor for a threshold type 717 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) 718 if (obj == NULL || sensorObj == NULL) { 719 THROW(vmSymbols::java_lang_NullPointerException()); 720 } 721 722 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK); 723 oop s = JNIHandles::resolve(sensorObj); 724 assert(s->is_instance(), "Sensor should be an instanceOop"); 725 instanceHandle sensor_h(THREAD, (instanceOop) s); 726 if (!sensor_h->is_a(sensor_klass)) { 727 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 728 "Sensor is not an instance of sun.management.Sensor class"); 729 } 730 731 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); 732 assert(mpool != NULL, "MemoryPool should exist"); 733 734 switch (type) { 735 case JMM_USAGE_THRESHOLD_HIGH: 736 case JMM_USAGE_THRESHOLD_LOW: 737 // have only one sensor for threshold high and low 738 mpool->set_usage_sensor_obj(sensor_h); 739 break; 740 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 741 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 742 // have only one sensor for threshold high and low 743 mpool->set_gc_usage_sensor_obj(sensor_h); 744 break; 745 default: 746 assert(false, "Unrecognized type"); 747 } 748 749 JVM_END 750 751 752 // Sets the threshold of a given memory pool. 753 // Returns the previous threshold. 754 // 755 // Input parameters: 756 // pool - the MemoryPoolMXBean object 757 // type - threshold type 758 // threshold - the new threshold (must not be negative) 759 // 760 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) 761 if (threshold < 0) { 762 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 763 "Invalid threshold value", 764 -1); 765 } 766 767 if ((size_t)threshold > max_uintx) { 768 stringStream st; 769 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); 770 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); 771 } 772 773 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); 774 assert(pool != NULL, "MemoryPool should exist"); 775 776 jlong prev = 0; 777 switch (type) { 778 case JMM_USAGE_THRESHOLD_HIGH: 779 if (!pool->usage_threshold()->is_high_threshold_supported()) { 780 return -1; 781 } 782 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); 783 break; 784 785 case JMM_USAGE_THRESHOLD_LOW: 786 if (!pool->usage_threshold()->is_low_threshold_supported()) { 787 return -1; 788 } 789 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); 790 break; 791 792 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 793 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { 794 return -1; 795 } 796 // return and the new threshold is effective for the next GC 797 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); 798 799 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 800 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { 801 return -1; 802 } 803 // return and the new threshold is effective for the next GC 804 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); 805 806 default: 807 assert(false, "Unrecognized type"); 808 return -1; 809 } 810 811 // When the threshold is changed, reevaluate if the low memory 812 // detection is enabled. 813 if (prev != threshold) { 814 LowMemoryDetector::recompute_enabled_for_collected_pools(); 815 LowMemoryDetector::detect_low_memory(pool); 816 } 817 return prev; 818 JVM_END 819 820 // Gets an array containing the amount of memory allocated on the Java 821 // heap for a set of threads (in bytes). Each element of the array is 822 // the amount of memory allocated for the thread ID specified in the 823 // corresponding entry in the given array of thread IDs; or -1 if the 824 // thread does not exist or has terminated. 825 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, 826 jlongArray sizeArray)) 827 // Check if threads is null 828 if (ids == NULL || sizeArray == NULL) { 829 THROW(vmSymbols::java_lang_NullPointerException()); 830 } 831 832 ResourceMark rm(THREAD); 833 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 834 typeArrayHandle ids_ah(THREAD, ta); 835 836 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); 837 typeArrayHandle sizeArray_h(THREAD, sa); 838 839 // validate the thread id array 840 validate_thread_id_array(ids_ah, CHECK); 841 842 // sizeArray must be of the same length as the given array of thread IDs 843 int num_threads = ids_ah->length(); 844 if (num_threads != sizeArray_h->length()) { 845 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 846 "The length of the given long array does not match the length of " 847 "the given array of thread IDs"); 848 } 849 850 MutexLockerEx ml(Threads_lock); 851 for (int i = 0; i < num_threads; i++) { 852 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 853 if (java_thread != NULL) { 854 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); 855 } 856 } 857 JVM_END 858 859 // Returns a java/lang/management/MemoryUsage object representing 860 // the memory usage for the heap or non-heap memory. 861 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) 862 ResourceMark rm(THREAD); 863 864 // Calculate the memory usage 865 size_t total_init = 0; 866 size_t total_used = 0; 867 size_t total_committed = 0; 868 size_t total_max = 0; 869 bool has_undefined_init_size = false; 870 bool has_undefined_max_size = false; 871 872 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 873 MemoryPool* pool = MemoryService::get_memory_pool(i); 874 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { 875 MemoryUsage u = pool->get_memory_usage(); 876 total_used += u.used(); 877 total_committed += u.committed(); 878 879 // if any one of the memory pool has undefined init_size or max_size, 880 // set it to -1 881 if (u.init_size() == (size_t)-1) { 882 has_undefined_init_size = true; 883 } 884 if (!has_undefined_init_size) { 885 total_init += u.init_size(); 886 } 887 888 if (u.max_size() == (size_t)-1) { 889 has_undefined_max_size = true; 890 } 891 if (!has_undefined_max_size) { 892 total_max += u.max_size(); 893 } 894 } 895 } 896 if (has_undefined_init_size) { 897 total_init = -1; 898 } 899 if (has_undefined_max_size) { 900 total_max = -1; 901 } 902 903 MemoryUsage usage((heap ? InitialHeapSize : total_init), 904 total_used, 905 total_committed, 906 (heap ? Universe::heap()->max_capacity() : total_max)); 907 908 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 909 return JNIHandles::make_local(env, obj()); 910 JVM_END 911 912 // Returns the boolean value of a given attribute. 913 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) 914 switch (att) { 915 case JMM_VERBOSE_GC: 916 return MemoryService::get_verbose(); 917 case JMM_VERBOSE_CLASS: 918 return ClassLoadingService::get_verbose(); 919 case JMM_THREAD_CONTENTION_MONITORING: 920 return ThreadService::is_thread_monitoring_contention(); 921 case JMM_THREAD_CPU_TIME: 922 return ThreadService::is_thread_cpu_time_enabled(); 923 case JMM_THREAD_ALLOCATED_MEMORY: 924 return ThreadService::is_thread_allocated_memory_enabled(); 925 default: 926 assert(0, "Unrecognized attribute"); 927 return false; 928 } 929 JVM_END 930 931 // Sets the given boolean attribute and returns the previous value. 932 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) 933 switch (att) { 934 case JMM_VERBOSE_GC: 935 return MemoryService::set_verbose(flag != 0); 936 case JMM_VERBOSE_CLASS: 937 return ClassLoadingService::set_verbose(flag != 0); 938 case JMM_THREAD_CONTENTION_MONITORING: 939 return ThreadService::set_thread_monitoring_contention(flag != 0); 940 case JMM_THREAD_CPU_TIME: 941 return ThreadService::set_thread_cpu_time_enabled(flag != 0); 942 case JMM_THREAD_ALLOCATED_MEMORY: 943 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); 944 default: 945 assert(0, "Unrecognized attribute"); 946 return false; 947 } 948 JVM_END 949 950 951 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { 952 switch (att) { 953 case JMM_GC_TIME_MS: 954 return mgr->gc_time_ms(); 955 956 case JMM_GC_COUNT: 957 return mgr->gc_count(); 958 959 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: 960 // current implementation only has 1 ext attribute 961 return 1; 962 963 default: 964 assert(0, "Unrecognized GC attribute"); 965 return -1; 966 } 967 } 968 969 class VmThreadCountClosure: public ThreadClosure { 970 private: 971 int _count; 972 public: 973 VmThreadCountClosure() : _count(0) {}; 974 void do_thread(Thread* thread); 975 int count() { return _count; } 976 }; 977 978 void VmThreadCountClosure::do_thread(Thread* thread) { 979 // exclude externally visible JavaThreads 980 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 981 return; 982 } 983 984 _count++; 985 } 986 987 static jint get_vm_thread_count() { 988 VmThreadCountClosure vmtcc; 989 { 990 MutexLockerEx ml(Threads_lock); 991 Threads::threads_do(&vmtcc); 992 } 993 994 return vmtcc.count(); 995 } 996 997 static jint get_num_flags() { 998 // last flag entry is always NULL, so subtract 1 999 int nFlags = (int) Flag::numFlags - 1; 1000 int count = 0; 1001 for (int i = 0; i < nFlags; i++) { 1002 Flag* flag = &Flag::flags[i]; 1003 // Exclude the locked (diagnostic, experimental) flags 1004 if (flag->is_unlocked() || flag->is_unlocker()) { 1005 count++; 1006 } 1007 } 1008 return count; 1009 } 1010 1011 static jlong get_long_attribute(jmmLongAttribute att) { 1012 switch (att) { 1013 case JMM_CLASS_LOADED_COUNT: 1014 return ClassLoadingService::loaded_class_count(); 1015 1016 case JMM_CLASS_UNLOADED_COUNT: 1017 return ClassLoadingService::unloaded_class_count(); 1018 1019 case JMM_THREAD_TOTAL_COUNT: 1020 return ThreadService::get_total_thread_count(); 1021 1022 case JMM_THREAD_LIVE_COUNT: 1023 return ThreadService::get_live_thread_count(); 1024 1025 case JMM_THREAD_PEAK_COUNT: 1026 return ThreadService::get_peak_thread_count(); 1027 1028 case JMM_THREAD_DAEMON_COUNT: 1029 return ThreadService::get_daemon_thread_count(); 1030 1031 case JMM_JVM_INIT_DONE_TIME_MS: 1032 return Management::vm_init_done_time(); 1033 1034 case JMM_COMPILE_TOTAL_TIME_MS: 1035 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); 1036 1037 case JMM_OS_PROCESS_ID: 1038 return os::current_process_id(); 1039 1040 // Hotspot-specific counters 1041 case JMM_CLASS_LOADED_BYTES: 1042 return ClassLoadingService::loaded_class_bytes(); 1043 1044 case JMM_CLASS_UNLOADED_BYTES: 1045 return ClassLoadingService::unloaded_class_bytes(); 1046 1047 case JMM_SHARED_CLASS_LOADED_COUNT: 1048 return ClassLoadingService::loaded_shared_class_count(); 1049 1050 case JMM_SHARED_CLASS_UNLOADED_COUNT: 1051 return ClassLoadingService::unloaded_shared_class_count(); 1052 1053 1054 case JMM_SHARED_CLASS_LOADED_BYTES: 1055 return ClassLoadingService::loaded_shared_class_bytes(); 1056 1057 case JMM_SHARED_CLASS_UNLOADED_BYTES: 1058 return ClassLoadingService::unloaded_shared_class_bytes(); 1059 1060 case JMM_TOTAL_CLASSLOAD_TIME_MS: 1061 return ClassLoader::classloader_time_ms(); 1062 1063 case JMM_VM_GLOBAL_COUNT: 1064 return get_num_flags(); 1065 1066 case JMM_SAFEPOINT_COUNT: 1067 return RuntimeService::safepoint_count(); 1068 1069 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: 1070 return RuntimeService::safepoint_sync_time_ms(); 1071 1072 case JMM_TOTAL_STOPPED_TIME_MS: 1073 return RuntimeService::safepoint_time_ms(); 1074 1075 case JMM_TOTAL_APP_TIME_MS: 1076 return RuntimeService::application_time_ms(); 1077 1078 case JMM_VM_THREAD_COUNT: 1079 return get_vm_thread_count(); 1080 1081 case JMM_CLASS_INIT_TOTAL_COUNT: 1082 return ClassLoader::class_init_count(); 1083 1084 case JMM_CLASS_INIT_TOTAL_TIME_MS: 1085 return ClassLoader::class_init_time_ms(); 1086 1087 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: 1088 return ClassLoader::class_verify_time_ms(); 1089 1090 case JMM_METHOD_DATA_SIZE_BYTES: 1091 return ClassLoadingService::class_method_data_size(); 1092 1093 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: 1094 return os::physical_memory(); 1095 1096 default: 1097 return -1; 1098 } 1099 } 1100 1101 1102 // Returns the long value of a given attribute. 1103 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) 1104 if (obj == NULL) { 1105 return get_long_attribute(att); 1106 } else { 1107 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); 1108 if (mgr != NULL) { 1109 return get_gc_attribute(mgr, att); 1110 } 1111 } 1112 return -1; 1113 JVM_END 1114 1115 // Gets the value of all attributes specified in the given array 1116 // and sets the value in the result array. 1117 // Returns the number of attributes found. 1118 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, 1119 jobject obj, 1120 jmmLongAttribute* atts, 1121 jint count, 1122 jlong* result)) 1123 1124 int num_atts = 0; 1125 if (obj == NULL) { 1126 for (int i = 0; i < count; i++) { 1127 result[i] = get_long_attribute(atts[i]); 1128 if (result[i] != -1) { 1129 num_atts++; 1130 } 1131 } 1132 } else { 1133 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); 1134 for (int i = 0; i < count; i++) { 1135 result[i] = get_gc_attribute(mgr, atts[i]); 1136 if (result[i] != -1) { 1137 num_atts++; 1138 } 1139 } 1140 } 1141 return num_atts; 1142 JVM_END 1143 1144 // Helper function to do thread dump for a specific list of threads 1145 static void do_thread_dump(ThreadDumpResult* dump_result, 1146 typeArrayHandle ids_ah, // array of thread ID (long[]) 1147 int num_threads, 1148 int max_depth, 1149 bool with_locked_monitors, 1150 bool with_locked_synchronizers, 1151 TRAPS) { 1152 1153 // First get an array of threadObj handles. 1154 // A JavaThread may terminate before we get the stack trace. 1155 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 1156 { 1157 MutexLockerEx ml(Threads_lock); 1158 for (int i = 0; i < num_threads; i++) { 1159 jlong tid = ids_ah->long_at(i); 1160 JavaThread* jt = find_java_thread_from_id(tid); 1161 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); 1162 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); 1163 thread_handle_array->append(threadObj_h); 1164 } 1165 } 1166 1167 // Obtain thread dumps and thread snapshot information 1168 VM_ThreadDump op(dump_result, 1169 thread_handle_array, 1170 num_threads, 1171 max_depth, /* stack depth */ 1172 with_locked_monitors, 1173 with_locked_synchronizers); 1174 VMThread::execute(&op); 1175 } 1176 1177 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo 1178 // for the thread ID specified in the corresponding entry in 1179 // the given array of thread IDs; or NULL if the thread does not exist 1180 // or has terminated. 1181 // 1182 // Input parameters: 1183 // ids - array of thread IDs 1184 // maxDepth - the maximum depth of stack traces to be dumped: 1185 // maxDepth == -1 requests to dump entire stack trace. 1186 // maxDepth == 0 requests no stack trace. 1187 // infoArray - array of ThreadInfo objects 1188 // 1189 // QQQ - Why does this method return a value instead of void? 1190 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) 1191 // Check if threads is null 1192 if (ids == NULL || infoArray == NULL) { 1193 THROW_(vmSymbols::java_lang_NullPointerException(), -1); 1194 } 1195 1196 if (maxDepth < -1) { 1197 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1198 "Invalid maxDepth", -1); 1199 } 1200 1201 ResourceMark rm(THREAD); 1202 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1203 typeArrayHandle ids_ah(THREAD, ta); 1204 1205 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); 1206 objArrayOop oa = objArrayOop(infoArray_obj); 1207 objArrayHandle infoArray_h(THREAD, oa); 1208 1209 // validate the thread id array 1210 validate_thread_id_array(ids_ah, CHECK_0); 1211 1212 // validate the ThreadInfo[] parameters 1213 validate_thread_info_array(infoArray_h, CHECK_0); 1214 1215 // infoArray must be of the same length as the given array of thread IDs 1216 int num_threads = ids_ah->length(); 1217 if (num_threads != infoArray_h->length()) { 1218 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1219 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); 1220 } 1221 1222 if (JDK_Version::is_gte_jdk16x_version()) { 1223 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1224 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); 1225 } 1226 1227 // Must use ThreadDumpResult to store the ThreadSnapshot. 1228 // GC may occur after the thread snapshots are taken but before 1229 // this function returns. The threadObj and other oops kept 1230 // in the ThreadSnapshot are marked and adjusted during GC. 1231 ThreadDumpResult dump_result(num_threads); 1232 1233 if (maxDepth == 0) { 1234 // no stack trace dumped - do not need to stop the world 1235 { 1236 MutexLockerEx ml(Threads_lock); 1237 for (int i = 0; i < num_threads; i++) { 1238 jlong tid = ids_ah->long_at(i); 1239 JavaThread* jt = find_java_thread_from_id(tid); 1240 ThreadSnapshot* ts; 1241 if (jt == NULL) { 1242 // if the thread does not exist or now it is terminated, 1243 // create dummy snapshot 1244 ts = new ThreadSnapshot(); 1245 } else { 1246 ts = new ThreadSnapshot(jt); 1247 } 1248 dump_result.add_thread_snapshot(ts); 1249 } 1250 } 1251 } else { 1252 // obtain thread dump with the specific list of threads with stack trace 1253 do_thread_dump(&dump_result, 1254 ids_ah, 1255 num_threads, 1256 maxDepth, 1257 false, /* no locked monitor */ 1258 false, /* no locked synchronizers */ 1259 CHECK_0); 1260 } 1261 1262 int num_snapshots = dump_result.num_snapshots(); 1263 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); 1264 int index = 0; 1265 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { 1266 // For each thread, create an java/lang/management/ThreadInfo object 1267 // and fill with the thread information 1268 1269 if (ts->threadObj() == NULL) { 1270 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1271 infoArray_h->obj_at_put(index, NULL); 1272 continue; 1273 } 1274 1275 // Create java.lang.management.ThreadInfo object 1276 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); 1277 infoArray_h->obj_at_put(index, info_obj); 1278 } 1279 return 0; 1280 JVM_END 1281 1282 // Dump thread info for the specified threads. 1283 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo 1284 // for the thread ID specified in the corresponding entry in 1285 // the given array of thread IDs; or NULL if the thread does not exist 1286 // or has terminated. 1287 // 1288 // Input parameter: 1289 // ids - array of thread IDs; NULL indicates all live threads 1290 // locked_monitors - if true, dump locked object monitors 1291 // locked_synchronizers - if true, dump locked JSR-166 synchronizers 1292 // 1293 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) 1294 ResourceMark rm(THREAD); 1295 1296 if (JDK_Version::is_gte_jdk16x_version()) { 1297 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1298 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); 1299 } 1300 1301 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); 1302 int num_threads = (ta != NULL ? ta->length() : 0); 1303 typeArrayHandle ids_ah(THREAD, ta); 1304 1305 ThreadDumpResult dump_result(num_threads); // can safepoint 1306 1307 if (ids_ah() != NULL) { 1308 1309 // validate the thread id array 1310 validate_thread_id_array(ids_ah, CHECK_NULL); 1311 1312 // obtain thread dump of a specific list of threads 1313 do_thread_dump(&dump_result, 1314 ids_ah, 1315 num_threads, 1316 -1, /* entire stack */ 1317 (locked_monitors ? true : false), /* with locked monitors */ 1318 (locked_synchronizers ? true : false), /* with locked synchronizers */ 1319 CHECK_NULL); 1320 } else { 1321 // obtain thread dump of all threads 1322 VM_ThreadDump op(&dump_result, 1323 -1, /* entire stack */ 1324 (locked_monitors ? true : false), /* with locked monitors */ 1325 (locked_synchronizers ? true : false) /* with locked synchronizers */); 1326 VMThread::execute(&op); 1327 } 1328 1329 int num_snapshots = dump_result.num_snapshots(); 1330 1331 // create the result ThreadInfo[] object 1332 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 1333 instanceKlassHandle ik (THREAD, k); 1334 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); 1335 objArrayHandle result_h(THREAD, r); 1336 1337 int index = 0; 1338 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { 1339 if (ts->threadObj() == NULL) { 1340 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1341 result_h->obj_at_put(index, NULL); 1342 continue; 1343 } 1344 1345 ThreadStackTrace* stacktrace = ts->get_stack_trace(); 1346 assert(stacktrace != NULL, "Must have a stack trace dumped"); 1347 1348 // Create Object[] filled with locked monitors 1349 // Create int[] filled with the stack depth where a monitor was locked 1350 int num_frames = stacktrace->get_stack_depth(); 1351 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); 1352 1353 // Count the total number of locked monitors 1354 for (int i = 0; i < num_frames; i++) { 1355 StackFrameInfo* frame = stacktrace->stack_frame_at(i); 1356 num_locked_monitors += frame->num_locked_monitors(); 1357 } 1358 1359 objArrayHandle monitors_array; 1360 typeArrayHandle depths_array; 1361 objArrayHandle synchronizers_array; 1362 1363 if (locked_monitors) { 1364 // Constructs Object[] and int[] to contain the object monitor and the stack depth 1365 // where the thread locked it 1366 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); 1367 objArrayHandle mh(THREAD, array); 1368 monitors_array = mh; 1369 1370 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); 1371 typeArrayHandle dh(THREAD, tarray); 1372 depths_array = dh; 1373 1374 int count = 0; 1375 int j = 0; 1376 for (int depth = 0; depth < num_frames; depth++) { 1377 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); 1378 int len = frame->num_locked_monitors(); 1379 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); 1380 for (j = 0; j < len; j++) { 1381 oop monitor = locked_monitors->at(j); 1382 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); 1383 monitors_array->obj_at_put(count, monitor); 1384 depths_array->int_at_put(count, depth); 1385 count++; 1386 } 1387 } 1388 1389 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); 1390 for (j = 0; j < jni_locked_monitors->length(); j++) { 1391 oop object = jni_locked_monitors->at(j); 1392 assert(object != NULL && object->is_instance(), "must be a Java object"); 1393 monitors_array->obj_at_put(count, object); 1394 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info 1395 depths_array->int_at_put(count, -1); 1396 count++; 1397 } 1398 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); 1399 } 1400 1401 if (locked_synchronizers) { 1402 // Create Object[] filled with locked JSR-166 synchronizers 1403 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); 1404 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); 1405 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); 1406 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); 1407 1408 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); 1409 objArrayHandle sh(THREAD, array); 1410 synchronizers_array = sh; 1411 1412 for (int k = 0; k < num_locked_synchronizers; k++) { 1413 synchronizers_array->obj_at_put(k, locks->at(k)); 1414 } 1415 } 1416 1417 // Create java.lang.management.ThreadInfo object 1418 instanceOop info_obj = Management::create_thread_info_instance(ts, 1419 monitors_array, 1420 depths_array, 1421 synchronizers_array, 1422 CHECK_NULL); 1423 result_h->obj_at_put(index, info_obj); 1424 } 1425 1426 return (jobjectArray) JNIHandles::make_local(env, result_h()); 1427 JVM_END 1428 1429 // Returns an array of Class objects. 1430 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) 1431 ResourceMark rm(THREAD); 1432 1433 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter 1434 1435 int num_classes = lce.num_loaded_classes(); 1436 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); 1437 objArrayHandle classes_ah(THREAD, r); 1438 1439 for (int i = 0; i < num_classes; i++) { 1440 KlassHandle kh = lce.get_klass(i); 1441 oop mirror = kh()->java_mirror(); 1442 classes_ah->obj_at_put(i, mirror); 1443 } 1444 1445 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); 1446 JVM_END 1447 1448 // Reset statistic. Return true if the requested statistic is reset. 1449 // Otherwise, return false. 1450 // 1451 // Input parameters: 1452 // obj - specify which instance the statistic associated with to be reset 1453 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. 1454 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. 1455 // type - the type of statistic to be reset 1456 // 1457 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) 1458 ResourceMark rm(THREAD); 1459 1460 switch (type) { 1461 case JMM_STAT_PEAK_THREAD_COUNT: 1462 ThreadService::reset_peak_thread_count(); 1463 return true; 1464 1465 case JMM_STAT_THREAD_CONTENTION_COUNT: 1466 case JMM_STAT_THREAD_CONTENTION_TIME: { 1467 jlong tid = obj.j; 1468 if (tid < 0) { 1469 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); 1470 } 1471 1472 // Look for the JavaThread of this given tid 1473 MutexLockerEx ml(Threads_lock); 1474 if (tid == 0) { 1475 // reset contention statistics for all threads if tid == 0 1476 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { 1477 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1478 ThreadService::reset_contention_count_stat(java_thread); 1479 } else { 1480 ThreadService::reset_contention_time_stat(java_thread); 1481 } 1482 } 1483 } else { 1484 // reset contention statistics for a given thread 1485 JavaThread* java_thread = find_java_thread_from_id(tid); 1486 if (java_thread == NULL) { 1487 return false; 1488 } 1489 1490 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1491 ThreadService::reset_contention_count_stat(java_thread); 1492 } else { 1493 ThreadService::reset_contention_time_stat(java_thread); 1494 } 1495 } 1496 return true; 1497 break; 1498 } 1499 case JMM_STAT_PEAK_POOL_USAGE: { 1500 jobject o = obj.l; 1501 if (o == NULL) { 1502 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1503 } 1504 1505 oop pool_obj = JNIHandles::resolve(o); 1506 assert(pool_obj->is_instance(), "Should be an instanceOop"); 1507 instanceHandle ph(THREAD, (instanceOop) pool_obj); 1508 1509 MemoryPool* pool = MemoryService::get_memory_pool(ph); 1510 if (pool != NULL) { 1511 pool->reset_peak_memory_usage(); 1512 return true; 1513 } 1514 break; 1515 } 1516 case JMM_STAT_GC_STAT: { 1517 jobject o = obj.l; 1518 if (o == NULL) { 1519 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1520 } 1521 1522 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); 1523 if (mgr != NULL) { 1524 mgr->reset_gc_stat(); 1525 return true; 1526 } 1527 break; 1528 } 1529 default: 1530 assert(0, "Unknown Statistic Type"); 1531 } 1532 return false; 1533 JVM_END 1534 1535 // Returns the fast estimate of CPU time consumed by 1536 // a given thread (in nanoseconds). 1537 // If thread_id == 0, return CPU time for the current thread. 1538 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) 1539 if (!os::is_thread_cpu_time_supported()) { 1540 return -1; 1541 } 1542 1543 if (thread_id < 0) { 1544 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1545 "Invalid thread ID", -1); 1546 } 1547 1548 JavaThread* java_thread = NULL; 1549 if (thread_id == 0) { 1550 // current thread 1551 return os::current_thread_cpu_time(); 1552 } else { 1553 MutexLockerEx ml(Threads_lock); 1554 java_thread = find_java_thread_from_id(thread_id); 1555 if (java_thread != NULL) { 1556 return os::thread_cpu_time((Thread*) java_thread); 1557 } 1558 } 1559 return -1; 1560 JVM_END 1561 1562 // Returns the CPU time consumed by a given thread (in nanoseconds). 1563 // If thread_id == 0, CPU time for the current thread is returned. 1564 // If user_sys_cpu_time = true, user level and system CPU time of 1565 // a given thread is returned; otherwise, only user level CPU time 1566 // is returned. 1567 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) 1568 if (!os::is_thread_cpu_time_supported()) { 1569 return -1; 1570 } 1571 1572 if (thread_id < 0) { 1573 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1574 "Invalid thread ID", -1); 1575 } 1576 1577 JavaThread* java_thread = NULL; 1578 if (thread_id == 0) { 1579 // current thread 1580 return os::current_thread_cpu_time(user_sys_cpu_time != 0); 1581 } else { 1582 MutexLockerEx ml(Threads_lock); 1583 java_thread = find_java_thread_from_id(thread_id); 1584 if (java_thread != NULL) { 1585 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); 1586 } 1587 } 1588 return -1; 1589 JVM_END 1590 1591 // Gets an array containing the CPU times consumed by a set of threads 1592 // (in nanoseconds). Each element of the array is the CPU time for the 1593 // thread ID specified in the corresponding entry in the given array 1594 // of thread IDs; or -1 if the thread does not exist or has terminated. 1595 // If user_sys_cpu_time = true, the sum of user level and system CPU time 1596 // for the given thread is returned; otherwise, only user level CPU time 1597 // is returned. 1598 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, 1599 jlongArray timeArray, 1600 jboolean user_sys_cpu_time)) 1601 // Check if threads is null 1602 if (ids == NULL || timeArray == NULL) { 1603 THROW(vmSymbols::java_lang_NullPointerException()); 1604 } 1605 1606 ResourceMark rm(THREAD); 1607 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1608 typeArrayHandle ids_ah(THREAD, ta); 1609 1610 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); 1611 typeArrayHandle timeArray_h(THREAD, tia); 1612 1613 // validate the thread id array 1614 validate_thread_id_array(ids_ah, CHECK); 1615 1616 // timeArray must be of the same length as the given array of thread IDs 1617 int num_threads = ids_ah->length(); 1618 if (num_threads != timeArray_h->length()) { 1619 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1620 "The length of the given long array does not match the length of " 1621 "the given array of thread IDs"); 1622 } 1623 1624 MutexLockerEx ml(Threads_lock); 1625 for (int i = 0; i < num_threads; i++) { 1626 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 1627 if (java_thread != NULL) { 1628 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, 1629 user_sys_cpu_time != 0)); 1630 } 1631 } 1632 JVM_END 1633 1634 // Returns a String array of all VM global flag names 1635 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) 1636 // last flag entry is always NULL, so subtract 1 1637 int nFlags = (int) Flag::numFlags - 1; 1638 // allocate a temp array 1639 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1640 nFlags, CHECK_0); 1641 objArrayHandle flags_ah(THREAD, r); 1642 int num_entries = 0; 1643 for (int i = 0; i < nFlags; i++) { 1644 Flag* flag = &Flag::flags[i]; 1645 // Exclude the locked (experimental, diagnostic) flags 1646 if (flag->is_unlocked() || flag->is_unlocker()) { 1647 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); 1648 flags_ah->obj_at_put(num_entries, s()); 1649 num_entries++; 1650 } 1651 } 1652 1653 if (num_entries < nFlags) { 1654 // Return array of right length 1655 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); 1656 for(int i = 0; i < num_entries; i++) { 1657 res->obj_at_put(i, flags_ah->obj_at(i)); 1658 } 1659 return (jobjectArray)JNIHandles::make_local(env, res); 1660 } 1661 1662 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); 1663 JVM_END 1664 1665 // Utility function used by jmm_GetVMGlobals. Returns false if flag type 1666 // can't be determined, true otherwise. If false is returned, then *global 1667 // will be incomplete and invalid. 1668 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { 1669 Handle flag_name; 1670 if (name() == NULL) { 1671 flag_name = java_lang_String::create_from_str(flag->name, CHECK_false); 1672 } else { 1673 flag_name = name; 1674 } 1675 global->name = (jstring)JNIHandles::make_local(env, flag_name()); 1676 1677 if (flag->is_bool()) { 1678 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; 1679 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; 1680 } else if (flag->is_intx()) { 1681 global->value.j = (jlong)flag->get_intx(); 1682 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1683 } else if (flag->is_uintx()) { 1684 global->value.j = (jlong)flag->get_uintx(); 1685 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1686 } else if (flag->is_uint64_t()) { 1687 global->value.j = (jlong)flag->get_uint64_t(); 1688 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1689 } else if (flag->is_ccstr()) { 1690 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); 1691 global->value.l = (jobject)JNIHandles::make_local(env, str()); 1692 global->type = JMM_VMGLOBAL_TYPE_JSTRING; 1693 } else { 1694 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; 1695 return false; 1696 } 1697 1698 global->writeable = flag->is_writeable(); 1699 global->external = flag->is_external(); 1700 switch (flag->origin) { 1701 case DEFAULT: 1702 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; 1703 break; 1704 case COMMAND_LINE: 1705 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; 1706 break; 1707 case ENVIRON_VAR: 1708 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; 1709 break; 1710 case CONFIG_FILE: 1711 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; 1712 break; 1713 case MANAGEMENT: 1714 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; 1715 break; 1716 case ERGONOMIC: 1717 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; 1718 break; 1719 default: 1720 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; 1721 } 1722 1723 return true; 1724 } 1725 1726 // Fill globals array of count length with jmmVMGlobal entries 1727 // specified by names. If names == NULL, fill globals array 1728 // with all Flags. Return value is number of entries 1729 // created in globals. 1730 // If a Flag with a given name in an array element does not 1731 // exist, globals[i].name will be set to NULL. 1732 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, 1733 jobjectArray names, 1734 jmmVMGlobal *globals, 1735 jint count)) 1736 1737 1738 if (globals == NULL) { 1739 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1740 } 1741 1742 ResourceMark rm(THREAD); 1743 1744 if (names != NULL) { 1745 // return the requested globals 1746 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); 1747 objArrayHandle names_ah(THREAD, ta); 1748 // Make sure we have a String array 1749 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1750 if (element_klass != SystemDictionary::String_klass()) { 1751 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1752 "Array element type is not String class", 0); 1753 } 1754 1755 int names_length = names_ah->length(); 1756 int num_entries = 0; 1757 for (int i = 0; i < names_length && i < count; i++) { 1758 oop s = names_ah->obj_at(i); 1759 if (s == NULL) { 1760 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1761 } 1762 1763 Handle sh(THREAD, s); 1764 char* str = java_lang_String::as_utf8_string(s); 1765 Flag* flag = Flag::find_flag(str, strlen(str)); 1766 if (flag != NULL && 1767 add_global_entry(env, sh, &globals[i], flag, THREAD)) { 1768 num_entries++; 1769 } else { 1770 globals[i].name = NULL; 1771 } 1772 } 1773 return num_entries; 1774 } else { 1775 // return all globals if names == NULL 1776 1777 // last flag entry is always NULL, so subtract 1 1778 int nFlags = (int) Flag::numFlags - 1; 1779 Handle null_h; 1780 int num_entries = 0; 1781 for (int i = 0; i < nFlags && num_entries < count; i++) { 1782 Flag* flag = &Flag::flags[i]; 1783 // Exclude the locked (diagnostic, experimental) flags 1784 if ((flag->is_unlocked() || flag->is_unlocker()) && 1785 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { 1786 num_entries++; 1787 } 1788 } 1789 return num_entries; 1790 } 1791 JVM_END 1792 1793 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) 1794 ResourceMark rm(THREAD); 1795 1796 oop fn = JNIHandles::resolve_external_guard(flag_name); 1797 if (fn == NULL) { 1798 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 1799 "The flag name cannot be null."); 1800 } 1801 char* name = java_lang_String::as_utf8_string(fn); 1802 Flag* flag = Flag::find_flag(name, strlen(name)); 1803 if (flag == NULL) { 1804 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1805 "Flag does not exist."); 1806 } 1807 if (!flag->is_writeable()) { 1808 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1809 "This flag is not writeable."); 1810 } 1811 1812 bool succeed; 1813 if (flag->is_bool()) { 1814 bool bvalue = (new_value.z == JNI_TRUE ? true : false); 1815 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); 1816 } else if (flag->is_intx()) { 1817 intx ivalue = (intx)new_value.j; 1818 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); 1819 } else if (flag->is_uintx()) { 1820 uintx uvalue = (uintx)new_value.j; 1821 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); 1822 } else if (flag->is_uint64_t()) { 1823 uint64_t uvalue = (uint64_t)new_value.j; 1824 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT); 1825 } else if (flag->is_ccstr()) { 1826 oop str = JNIHandles::resolve_external_guard(new_value.l); 1827 if (str == NULL) { 1828 THROW(vmSymbols::java_lang_NullPointerException()); 1829 } 1830 ccstr svalue = java_lang_String::as_utf8_string(str); 1831 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); 1832 } 1833 assert(succeed, "Setting flag should succeed"); 1834 JVM_END 1835 1836 class ThreadTimesClosure: public ThreadClosure { 1837 private: 1838 objArrayHandle _names_strings; 1839 char **_names_chars; 1840 typeArrayHandle _times; 1841 int _names_len; 1842 int _times_len; 1843 int _count; 1844 1845 public: 1846 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times); 1847 ~ThreadTimesClosure(); 1848 virtual void do_thread(Thread* thread); 1849 void do_unlocked(); 1850 int count() { return _count; } 1851 }; 1852 1853 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, 1854 typeArrayHandle times) { 1855 assert(names() != NULL, "names was NULL"); 1856 assert(times() != NULL, "times was NULL"); 1857 _names_strings = names; 1858 _names_len = names->length(); 1859 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); 1860 _times = times; 1861 _times_len = times->length(); 1862 _count = 0; 1863 } 1864 1865 // 1866 // Called with Threads_lock held 1867 // 1868 void ThreadTimesClosure::do_thread(Thread* thread) { 1869 assert(thread != NULL, "thread was NULL"); 1870 1871 // exclude externally visible JavaThreads 1872 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 1873 return; 1874 } 1875 1876 if (_count >= _names_len || _count >= _times_len) { 1877 // skip if the result array is not big enough 1878 return; 1879 } 1880 1881 EXCEPTION_MARK; 1882 ResourceMark rm(THREAD); // thread->name() uses ResourceArea 1883 1884 assert(thread->name() != NULL, "All threads should have a name"); 1885 _names_chars[_count] = strdup(thread->name()); 1886 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? 1887 os::thread_cpu_time(thread) : -1); 1888 _count++; 1889 } 1890 1891 // Called without Threads_lock, we can allocate String objects. 1892 void ThreadTimesClosure::do_unlocked() { 1893 1894 EXCEPTION_MARK; 1895 for (int i = 0; i < _count; i++) { 1896 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); 1897 _names_strings->obj_at_put(i, s()); 1898 } 1899 } 1900 1901 ThreadTimesClosure::~ThreadTimesClosure() { 1902 for (int i = 0; i < _count; i++) { 1903 free(_names_chars[i]); 1904 } 1905 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal); 1906 } 1907 1908 // Fills names with VM internal thread names and times with the corresponding 1909 // CPU times. If names or times is NULL, a NullPointerException is thrown. 1910 // If the element type of names is not String, an IllegalArgumentException is 1911 // thrown. 1912 // If an array is not large enough to hold all the entries, only the entries 1913 // that fit will be returned. Return value is the number of VM internal 1914 // threads entries. 1915 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, 1916 jobjectArray names, 1917 jlongArray times)) 1918 if (names == NULL || times == NULL) { 1919 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1920 } 1921 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); 1922 objArrayHandle names_ah(THREAD, na); 1923 1924 // Make sure we have a String array 1925 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1926 if (element_klass != SystemDictionary::String_klass()) { 1927 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1928 "Array element type is not String class", 0); 1929 } 1930 1931 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); 1932 typeArrayHandle times_ah(THREAD, ta); 1933 1934 ThreadTimesClosure ttc(names_ah, times_ah); 1935 { 1936 MutexLockerEx ml(Threads_lock); 1937 Threads::threads_do(&ttc); 1938 } 1939 ttc.do_unlocked(); 1940 return ttc.count(); 1941 JVM_END 1942 1943 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { 1944 ResourceMark rm(THREAD); 1945 1946 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); 1947 VMThread::execute(&op); 1948 1949 DeadlockCycle* deadlocks = op.result(); 1950 if (deadlocks == NULL) { 1951 // no deadlock found and return 1952 return Handle(); 1953 } 1954 1955 int num_threads = 0; 1956 DeadlockCycle* cycle; 1957 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1958 num_threads += cycle->num_threads(); 1959 } 1960 1961 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); 1962 objArrayHandle threads_ah(THREAD, r); 1963 1964 int index = 0; 1965 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1966 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); 1967 int len = deadlock_threads->length(); 1968 for (int i = 0; i < len; i++) { 1969 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); 1970 index++; 1971 } 1972 } 1973 return threads_ah; 1974 } 1975 1976 // Finds cycles of threads that are deadlocked involved in object monitors 1977 // and JSR-166 synchronizers. 1978 // Returns an array of Thread objects which are in deadlock, if any. 1979 // Otherwise, returns NULL. 1980 // 1981 // Input parameter: 1982 // object_monitors_only - if true, only check object monitors 1983 // 1984 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) 1985 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); 1986 return (jobjectArray) JNIHandles::make_local(env, result()); 1987 JVM_END 1988 1989 // Finds cycles of threads that are deadlocked on monitor locks 1990 // Returns an array of Thread objects which are in deadlock, if any. 1991 // Otherwise, returns NULL. 1992 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) 1993 Handle result = find_deadlocks(true, CHECK_0); 1994 return (jobjectArray) JNIHandles::make_local(env, result()); 1995 JVM_END 1996 1997 // Gets the information about GC extension attributes including 1998 // the name of the attribute, its type, and a short description. 1999 // 2000 // Input parameters: 2001 // mgr - GC memory manager 2002 // info - caller allocated array of jmmExtAttributeInfo 2003 // count - number of elements of the info array 2004 // 2005 // Returns the number of GC extension attributes filled in the info array; or 2006 // -1 if info is not big enough 2007 // 2008 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) 2009 // All GC memory managers have 1 attribute (number of GC threads) 2010 if (count == 0) { 2011 return 0; 2012 } 2013 2014 if (info == NULL) { 2015 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2016 } 2017 2018 info[0].name = "GcThreadCount"; 2019 info[0].type = 'I'; 2020 info[0].description = "Number of GC threads"; 2021 return 1; 2022 JVM_END 2023 2024 // verify the given array is an array of java/lang/management/MemoryUsage objects 2025 // of a given length and return the objArrayOop 2026 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { 2027 if (array == NULL) { 2028 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2029 } 2030 2031 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); 2032 objArrayHandle array_h(THREAD, oa); 2033 2034 // array must be of the given length 2035 if (length != array_h->length()) { 2036 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2037 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); 2038 } 2039 2040 // check if the element of array is of type MemoryUsage class 2041 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); 2042 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass(); 2043 if (element_klass != usage_klass) { 2044 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2045 "The element type is not MemoryUsage class", 0); 2046 } 2047 2048 return array_h(); 2049 } 2050 2051 // Gets the statistics of the last GC of a given GC memory manager. 2052 // Input parameters: 2053 // obj - GarbageCollectorMXBean object 2054 // gc_stat - caller allocated jmmGCStat where: 2055 // a. before_gc_usage - array of MemoryUsage objects 2056 // b. after_gc_usage - array of MemoryUsage objects 2057 // c. gc_ext_attributes_values_size is set to the 2058 // gc_ext_attribute_values array allocated 2059 // d. gc_ext_attribute_values is a caller allocated array of jvalue. 2060 // 2061 // On return, 2062 // gc_index == 0 indicates no GC statistics available 2063 // 2064 // before_gc_usage and after_gc_usage - filled with per memory pool 2065 // before and after GC usage in the same order as the memory pools 2066 // returned by GetMemoryPools for a given GC memory manager. 2067 // num_gc_ext_attributes indicates the number of elements in 2068 // the gc_ext_attribute_values array is filled; or 2069 // -1 if the gc_ext_attributes_values array is not big enough 2070 // 2071 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) 2072 ResourceMark rm(THREAD); 2073 2074 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { 2075 THROW(vmSymbols::java_lang_NullPointerException()); 2076 } 2077 2078 // Get the GCMemoryManager 2079 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2080 2081 // Make a copy of the last GC statistics 2082 // GC may occur while constructing the last GC information 2083 int num_pools = MemoryService::num_memory_pools(); 2084 GCStatInfo stat(num_pools); 2085 if (mgr->get_last_gc_stat(&stat) == 0) { 2086 gc_stat->gc_index = 0; 2087 return; 2088 } 2089 2090 gc_stat->gc_index = stat.gc_index(); 2091 gc_stat->start_time = Management::ticks_to_ms(stat.start_time()); 2092 gc_stat->end_time = Management::ticks_to_ms(stat.end_time()); 2093 2094 // Current implementation does not have GC extension attributes 2095 gc_stat->num_gc_ext_attributes = 0; 2096 2097 // Fill the arrays of MemoryUsage objects with before and after GC 2098 // per pool memory usage 2099 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, 2100 num_pools, 2101 CHECK); 2102 objArrayHandle usage_before_gc_ah(THREAD, bu); 2103 2104 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, 2105 num_pools, 2106 CHECK); 2107 objArrayHandle usage_after_gc_ah(THREAD, au); 2108 2109 for (int i = 0; i < num_pools; i++) { 2110 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK); 2111 Handle after_usage; 2112 2113 MemoryUsage u = stat.after_gc_usage_for_pool(i); 2114 if (u.max_size() == 0 && u.used() > 0) { 2115 // If max size == 0, this pool is a survivor space. 2116 // Set max size = -1 since the pools will be swapped after GC. 2117 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); 2118 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); 2119 } else { 2120 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK); 2121 } 2122 usage_before_gc_ah->obj_at_put(i, before_usage()); 2123 usage_after_gc_ah->obj_at_put(i, after_usage()); 2124 } 2125 2126 if (gc_stat->gc_ext_attribute_values_size > 0) { 2127 // Current implementation only has 1 attribute (number of GC threads) 2128 // The type is 'I' 2129 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); 2130 } 2131 JVM_END 2132 2133 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) 2134 ResourceMark rm(THREAD); 2135 // Get the GCMemoryManager 2136 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2137 mgr->set_notification_enabled(enabled?true:false); 2138 JVM_END 2139 2140 // Dump heap - Returns 0 if succeeds. 2141 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) 2142 #if INCLUDE_SERVICES 2143 ResourceMark rm(THREAD); 2144 oop on = JNIHandles::resolve_external_guard(outputfile); 2145 if (on == NULL) { 2146 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2147 "Output file name cannot be null.", -1); 2148 } 2149 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1)); 2150 if (name == NULL) { 2151 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2152 "Output file name cannot be null.", -1); 2153 } 2154 HeapDumper dumper(live ? true : false); 2155 if (dumper.dump(name) != 0) { 2156 const char* errmsg = dumper.error_as_C_string(); 2157 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); 2158 } 2159 return 0; 2160 #else // INCLUDE_SERVICES 2161 return -1; 2162 #endif // INCLUDE_SERVICES 2163 JVM_END 2164 2165 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) 2166 ResourceMark rm(THREAD); 2167 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean); 2168 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), 2169 dcmd_list->length(), CHECK_NULL); 2170 objArrayHandle cmd_array(THREAD, cmd_array_oop); 2171 for (int i = 0; i < dcmd_list->length(); i++) { 2172 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); 2173 cmd_array->obj_at_put(i, cmd_name); 2174 } 2175 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); 2176 JVM_END 2177 2178 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, 2179 dcmdInfo* infoArray)) 2180 if (cmds == NULL || infoArray == NULL) { 2181 THROW(vmSymbols::java_lang_NullPointerException()); 2182 } 2183 2184 ResourceMark rm(THREAD); 2185 2186 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); 2187 objArrayHandle cmds_ah(THREAD, ca); 2188 2189 // Make sure we have a String array 2190 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass(); 2191 if (element_klass != SystemDictionary::String_klass()) { 2192 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2193 "Array element type is not String class"); 2194 } 2195 2196 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean); 2197 2198 int num_cmds = cmds_ah->length(); 2199 for (int i = 0; i < num_cmds; i++) { 2200 oop cmd = cmds_ah->obj_at(i); 2201 if (cmd == NULL) { 2202 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2203 "Command name cannot be null."); 2204 } 2205 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2206 if (cmd_name == NULL) { 2207 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2208 "Command name cannot be null."); 2209 } 2210 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); 2211 if (pos == -1) { 2212 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2213 "Unknown diagnostic command"); 2214 } 2215 DCmdInfo* info = info_list->at(pos); 2216 infoArray[i].name = info->name(); 2217 infoArray[i].description = info->description(); 2218 infoArray[i].impact = info->impact(); 2219 JavaPermission p = info->permission(); 2220 infoArray[i].permission_class = p._class; 2221 infoArray[i].permission_name = p._name; 2222 infoArray[i].permission_action = p._action; 2223 infoArray[i].num_arguments = info->num_arguments(); 2224 infoArray[i].enabled = info->is_enabled(); 2225 } 2226 JVM_END 2227 2228 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, 2229 jstring command, dcmdArgInfo* infoArray)) 2230 ResourceMark rm(THREAD); 2231 oop cmd = JNIHandles::resolve_external_guard(command); 2232 if (cmd == NULL) { 2233 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2234 "Command line cannot be null."); 2235 } 2236 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2237 if (cmd_name == NULL) { 2238 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2239 "Command line content cannot be null."); 2240 } 2241 DCmd* dcmd = NULL; 2242 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name, 2243 strlen(cmd_name)); 2244 if (factory != NULL) { 2245 dcmd = factory->create_resource_instance(NULL); 2246 } 2247 if (dcmd == NULL) { 2248 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2249 "Unknown diagnostic command"); 2250 } 2251 DCmdMark mark(dcmd); 2252 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); 2253 if (array->length() == 0) { 2254 return; 2255 } 2256 for (int i = 0; i < array->length(); i++) { 2257 infoArray[i].name = array->at(i)->name(); 2258 infoArray[i].description = array->at(i)->description(); 2259 infoArray[i].type = array->at(i)->type(); 2260 infoArray[i].default_string = array->at(i)->default_string(); 2261 infoArray[i].mandatory = array->at(i)->is_mandatory(); 2262 infoArray[i].option = array->at(i)->is_option(); 2263 infoArray[i].multiple = array->at(i)->is_multiple(); 2264 infoArray[i].position = array->at(i)->position(); 2265 } 2266 return; 2267 JVM_END 2268 2269 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) 2270 ResourceMark rm(THREAD); 2271 oop cmd = JNIHandles::resolve_external_guard(commandline); 2272 if (cmd == NULL) { 2273 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2274 "Command line cannot be null."); 2275 } 2276 char* cmdline = java_lang_String::as_utf8_string(cmd); 2277 if (cmdline == NULL) { 2278 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2279 "Command line content cannot be null."); 2280 } 2281 bufferedStream output; 2282 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL); 2283 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); 2284 return (jstring) JNIHandles::make_local(env, result); 2285 JVM_END 2286 2287 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled)) 2288 DCmdFactory::set_jmx_notification_enabled(enabled?true:false); 2289 JVM_END 2290 2291 jlong Management::ticks_to_ms(jlong ticks) { 2292 assert(os::elapsed_frequency() > 0, "Must be non-zero"); 2293 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) 2294 * (double)1000.0); 2295 } 2296 2297 const struct jmmInterface_1_ jmm_interface = { 2298 NULL, 2299 NULL, 2300 jmm_GetVersion, 2301 jmm_GetOptionalSupport, 2302 jmm_GetInputArguments, 2303 jmm_GetThreadInfo, 2304 jmm_GetInputArgumentArray, 2305 jmm_GetMemoryPools, 2306 jmm_GetMemoryManagers, 2307 jmm_GetMemoryPoolUsage, 2308 jmm_GetPeakMemoryPoolUsage, 2309 jmm_GetThreadAllocatedMemory, 2310 jmm_GetMemoryUsage, 2311 jmm_GetLongAttribute, 2312 jmm_GetBoolAttribute, 2313 jmm_SetBoolAttribute, 2314 jmm_GetLongAttributes, 2315 jmm_FindMonitorDeadlockedThreads, 2316 jmm_GetThreadCpuTime, 2317 jmm_GetVMGlobalNames, 2318 jmm_GetVMGlobals, 2319 jmm_GetInternalThreadTimes, 2320 jmm_ResetStatistic, 2321 jmm_SetPoolSensor, 2322 jmm_SetPoolThreshold, 2323 jmm_GetPoolCollectionUsage, 2324 jmm_GetGCExtAttributeInfo, 2325 jmm_GetLastGCStat, 2326 jmm_GetThreadCpuTimeWithKind, 2327 jmm_GetThreadCpuTimesWithKind, 2328 jmm_DumpHeap0, 2329 jmm_FindDeadlockedThreads, 2330 jmm_SetVMGlobal, 2331 NULL, 2332 jmm_DumpThreads, 2333 jmm_SetGCNotificationEnabled, 2334 jmm_GetDiagnosticCommands, 2335 jmm_GetDiagnosticCommandInfo, 2336 jmm_GetDiagnosticCommandArgumentsInfo, 2337 jmm_ExecuteDiagnosticCommand, 2338 jmm_SetDiagnosticFrameworkNotificationEnabled 2339 }; 2340 #endif // INCLUDE_MANAGEMENT 2341 2342 void* Management::get_jmm_interface(int version) { 2343 #if INCLUDE_MANAGEMENT 2344 if (version == JMM_VERSION_1_0) { 2345 return (void*) &jmm_interface; 2346 } 2347 #endif // INCLUDE_MANAGEMENT 2348 return NULL; 2349 }