management.cpp revision 9099:115188e14c15
1/* 2 * Copyright (c) 2003, 2015, 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/objArrayOop.inline.hpp" 34#include "oops/oop.inline.hpp" 35#include "runtime/arguments.hpp" 36#include "runtime/globals.hpp" 37#include "runtime/handles.inline.hpp" 38#include "runtime/interfaceSupport.hpp" 39#include "runtime/javaCalls.hpp" 40#include "runtime/jniHandles.hpp" 41#include "runtime/os.hpp" 42#include "runtime/serviceThread.hpp" 43#include "runtime/thread.inline.hpp" 44#include "services/classLoadingService.hpp" 45#include "services/diagnosticCommand.hpp" 46#include "services/diagnosticFramework.hpp" 47#include "services/writeableFlags.hpp" 48#include "services/heapDumper.hpp" 49#include "services/jmm.h" 50#include "services/lowMemoryDetector.hpp" 51#include "services/gcNotifier.hpp" 52#include "services/nmtDCmd.hpp" 53#include "services/management.hpp" 54#include "services/memoryManager.hpp" 55#include "services/memoryPool.hpp" 56#include "services/memoryService.hpp" 57#include "services/runtimeService.hpp" 58#include "services/threadService.hpp" 59#include "utilities/macros.hpp" 60 61PerfVariable* Management::_begin_vm_creation_time = NULL; 62PerfVariable* Management::_end_vm_creation_time = NULL; 63PerfVariable* Management::_vm_init_done_time = NULL; 64 65Klass* Management::_diagnosticCommandImpl_klass = NULL; 66Klass* Management::_garbageCollectorExtImpl_klass = NULL; 67Klass* Management::_garbageCollectorMXBean_klass = NULL; 68Klass* Management::_gcInfo_klass = NULL; 69Klass* Management::_managementFactoryHelper_klass = NULL; 70Klass* Management::_memoryManagerMXBean_klass = NULL; 71Klass* Management::_memoryPoolMXBean_klass = NULL; 72Klass* Management::_memoryUsage_klass = NULL; 73Klass* Management::_sensor_klass = NULL; 74Klass* Management::_threadInfo_klass = NULL; 75 76jmmOptionalSupport Management::_optional_support = {0}; 77TimeStamp Management::_stamp; 78 79void management_init() { 80#if INCLUDE_MANAGEMENT 81 Management::init(); 82 ThreadService::init(); 83 RuntimeService::init(); 84 ClassLoadingService::init(); 85#else 86 ThreadService::init(); 87 // Make sure the VM version is initialized 88 // This is normally called by RuntimeService::init(). 89 // Since that is conditionalized out, we need to call it here. 90 Abstract_VM_Version::initialize(); 91#endif // INCLUDE_MANAGEMENT 92} 93 94#if INCLUDE_MANAGEMENT 95 96void Management::init() { 97 EXCEPTION_MARK; 98 99 // These counters are for java.lang.management API support. 100 // They are created even if -XX:-UsePerfData is set and in 101 // that case, they will be allocated on C heap. 102 103 _begin_vm_creation_time = 104 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", 105 PerfData::U_None, CHECK); 106 107 _end_vm_creation_time = 108 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", 109 PerfData::U_None, CHECK); 110 111 _vm_init_done_time = 112 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", 113 PerfData::U_None, CHECK); 114 115 // Initialize optional support 116 _optional_support.isLowMemoryDetectionSupported = 1; 117 _optional_support.isCompilationTimeMonitoringSupported = 1; 118 _optional_support.isThreadContentionMonitoringSupported = 1; 119 120 if (os::is_thread_cpu_time_supported()) { 121 _optional_support.isCurrentThreadCpuTimeSupported = 1; 122 _optional_support.isOtherThreadCpuTimeSupported = 1; 123 } else { 124 _optional_support.isCurrentThreadCpuTimeSupported = 0; 125 _optional_support.isOtherThreadCpuTimeSupported = 0; 126 } 127 128 _optional_support.isBootClassPathSupported = 1; 129 _optional_support.isObjectMonitorUsageSupported = 1; 130#if INCLUDE_SERVICES 131 // This depends on the heap inspector 132 _optional_support.isSynchronizerUsageSupported = 1; 133#endif // INCLUDE_SERVICES 134 _optional_support.isThreadAllocatedMemorySupported = 1; 135 _optional_support.isRemoteDiagnosticCommandsSupported = 1; 136 137 // Registration of the diagnostic commands 138 DCmdRegistrant::register_dcmds(); 139 DCmdRegistrant::register_dcmds_ext(); 140 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 141 | DCmd_Source_MBean; 142 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 143} 144 145void Management::initialize(TRAPS) { 146 // Start the service thread 147 ServiceThread::initialize(); 148 149 if (ManagementServer) { 150 ResourceMark rm(THREAD); 151 HandleMark hm(THREAD); 152 153 // Load and initialize the sun.management.Agent class 154 // invoke startAgent method to start the management server 155 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 156 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_management_Agent(), 157 loader, 158 Handle(), 159 THREAD); 160 if (k == NULL) { 161 vm_exit_during_initialization("Management agent initialization failure: " 162 "class sun.management.Agent not found."); 163 } 164 instanceKlassHandle ik (THREAD, k); 165 166 JavaValue result(T_VOID); 167 JavaCalls::call_static(&result, 168 ik, 169 vmSymbols::startAgent_name(), 170 vmSymbols::void_method_signature(), 171 CHECK); 172 } 173} 174 175void Management::get_optional_support(jmmOptionalSupport* support) { 176 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); 177} 178 179Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) { 180 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); 181 instanceKlassHandle ik (THREAD, k); 182 if (ik->should_be_initialized()) { 183 ik->initialize(CHECK_NULL); 184 } 185 // If these classes change to not be owned by the boot loader, they need 186 // to be walked to keep their class loader alive in oops_do. 187 assert(ik->class_loader() == NULL, "need to follow in oops_do"); 188 return ik(); 189} 190 191void Management::record_vm_startup_time(jlong begin, jlong duration) { 192 // if the performance counter is not initialized, 193 // then vm initialization failed; simply return. 194 if (_begin_vm_creation_time == NULL) return; 195 196 _begin_vm_creation_time->set_value(begin); 197 _end_vm_creation_time->set_value(begin + duration); 198 PerfMemory::set_accessible(true); 199} 200 201jlong Management::timestamp() { 202 TimeStamp t; 203 t.update(); 204 return t.ticks() - _stamp.ticks(); 205} 206 207void Management::oops_do(OopClosure* f) { 208 MemoryService::oops_do(f); 209 ThreadService::oops_do(f); 210} 211 212Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) { 213 if (_threadInfo_klass == NULL) { 214 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); 215 } 216 return _threadInfo_klass; 217} 218 219Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) { 220 if (_memoryUsage_klass == NULL) { 221 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); 222 } 223 return _memoryUsage_klass; 224} 225 226Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { 227 if (_memoryPoolMXBean_klass == NULL) { 228 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); 229 } 230 return _memoryPoolMXBean_klass; 231} 232 233Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { 234 if (_memoryManagerMXBean_klass == NULL) { 235 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); 236 } 237 return _memoryManagerMXBean_klass; 238} 239 240Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { 241 if (_garbageCollectorMXBean_klass == NULL) { 242 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); 243 } 244 return _garbageCollectorMXBean_klass; 245} 246 247Klass* Management::sun_management_Sensor_klass(TRAPS) { 248 if (_sensor_klass == NULL) { 249 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); 250 } 251 return _sensor_klass; 252} 253 254Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) { 255 if (_managementFactoryHelper_klass == NULL) { 256 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL); 257 } 258 return _managementFactoryHelper_klass; 259} 260 261Klass* Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS) { 262 if (_garbageCollectorExtImpl_klass == NULL) { 263 _garbageCollectorExtImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_GarbageCollectorExtImpl(), CHECK_NULL); 264 } 265 return _garbageCollectorExtImpl_klass; 266} 267 268Klass* Management::com_sun_management_GcInfo_klass(TRAPS) { 269 if (_gcInfo_klass == NULL) { 270 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); 271 } 272 return _gcInfo_klass; 273} 274 275Klass* Management::com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS) { 276 if (_diagnosticCommandImpl_klass == NULL) { 277 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_DiagnosticCommandImpl(), CHECK_NULL); 278 } 279 return _diagnosticCommandImpl_klass; 280} 281 282static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { 283 Handle snapshot_thread(THREAD, snapshot->threadObj()); 284 285 jlong contended_time; 286 jlong waited_time; 287 if (ThreadService::is_thread_monitoring_contention()) { 288 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); 289 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); 290 } else { 291 // set them to -1 if thread contention monitoring is disabled. 292 contended_time = max_julong; 293 waited_time = max_julong; 294 } 295 296 int thread_status = snapshot->thread_status(); 297 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); 298 if (snapshot->is_ext_suspended()) { 299 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; 300 } 301 if (snapshot->is_in_native()) { 302 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; 303 } 304 305 ThreadStackTrace* st = snapshot->get_stack_trace(); 306 Handle stacktrace_h; 307 if (st != NULL) { 308 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); 309 } else { 310 stacktrace_h = Handle(); 311 } 312 313 args->push_oop(snapshot_thread); 314 args->push_int(thread_status); 315 args->push_oop(Handle(THREAD, snapshot->blocker_object())); 316 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); 317 args->push_long(snapshot->contended_enter_count()); 318 args->push_long(contended_time); 319 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); 320 args->push_long(waited_time); 321 args->push_oop(stacktrace_h); 322} 323 324// Helper function to construct a ThreadInfo object 325instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { 326 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 327 instanceKlassHandle ik (THREAD, k); 328 329 JavaValue result(T_VOID); 330 JavaCallArguments args(14); 331 332 // First allocate a ThreadObj object and 333 // push the receiver as the first argument 334 Handle element = ik->allocate_instance_handle(CHECK_NULL); 335 args.push_oop(element); 336 337 // initialize the arguments for the ThreadInfo constructor 338 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 339 340 // Call ThreadInfo constructor with no locked monitors and synchronizers 341 JavaCalls::call_special(&result, 342 ik, 343 vmSymbols::object_initializer_name(), 344 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), 345 &args, 346 CHECK_NULL); 347 348 return (instanceOop) element(); 349} 350 351instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, 352 objArrayHandle monitors_array, 353 typeArrayHandle depths_array, 354 objArrayHandle synchronizers_array, 355 TRAPS) { 356 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 357 instanceKlassHandle ik (THREAD, k); 358 359 JavaValue result(T_VOID); 360 JavaCallArguments args(17); 361 362 // First allocate a ThreadObj object and 363 // push the receiver as the first argument 364 Handle element = ik->allocate_instance_handle(CHECK_NULL); 365 args.push_oop(element); 366 367 // initialize the arguments for the ThreadInfo constructor 368 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 369 370 // push the locked monitors and synchronizers in the arguments 371 args.push_oop(monitors_array); 372 args.push_oop(depths_array); 373 args.push_oop(synchronizers_array); 374 375 // Call ThreadInfo constructor with locked monitors and synchronizers 376 JavaCalls::call_special(&result, 377 ik, 378 vmSymbols::object_initializer_name(), 379 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), 380 &args, 381 CHECK_NULL); 382 383 return (instanceOop) element(); 384} 385 386 387static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { 388 if (mgr == NULL) { 389 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 390 } 391 oop mgr_obj = JNIHandles::resolve(mgr); 392 instanceHandle h(THREAD, (instanceOop) mgr_obj); 393 394 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); 395 if (!h->is_a(k)) { 396 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 397 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", 398 NULL); 399 } 400 401 MemoryManager* gc = MemoryService::get_memory_manager(h); 402 if (gc == NULL || !gc->is_gc_memory_manager()) { 403 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 404 "Invalid GC memory manager", 405 NULL); 406 } 407 return (GCMemoryManager*) gc; 408} 409 410static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { 411 if (obj == NULL) { 412 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 413 } 414 415 oop pool_obj = JNIHandles::resolve(obj); 416 assert(pool_obj->is_instance(), "Should be an instanceOop"); 417 instanceHandle ph(THREAD, (instanceOop) pool_obj); 418 419 return MemoryService::get_memory_pool(ph); 420} 421 422#endif // INCLUDE_MANAGEMENT 423 424static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { 425 int num_threads = ids_ah->length(); 426 427 // Validate input thread IDs 428 int i = 0; 429 for (i = 0; i < num_threads; i++) { 430 jlong tid = ids_ah->long_at(i); 431 if (tid <= 0) { 432 // throw exception if invalid thread id. 433 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 434 "Invalid thread ID entry"); 435 } 436 } 437} 438 439#if INCLUDE_MANAGEMENT 440 441static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { 442 // check if the element of infoArray is of type ThreadInfo class 443 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); 444 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass(); 445 if (element_klass != threadinfo_klass) { 446 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 447 "infoArray element type is not ThreadInfo class"); 448 } 449} 450 451 452static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { 453 if (obj == NULL) { 454 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 455 } 456 457 oop mgr_obj = JNIHandles::resolve(obj); 458 assert(mgr_obj->is_instance(), "Should be an instanceOop"); 459 instanceHandle mh(THREAD, (instanceOop) mgr_obj); 460 461 return MemoryService::get_memory_manager(mh); 462} 463 464// Returns a version string and sets major and minor version if 465// the input parameters are non-null. 466JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) 467 return JMM_VERSION; 468JVM_END 469 470// Gets the list of VM monitoring and management optional supports 471// Returns 0 if succeeded; otherwise returns non-zero. 472JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) 473 if (support == NULL) { 474 return -1; 475 } 476 Management::get_optional_support(support); 477 return 0; 478JVM_END 479 480// Returns a java.lang.String object containing the input arguments to the VM. 481JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) 482 ResourceMark rm(THREAD); 483 484 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 485 return NULL; 486 } 487 488 char** vm_flags = Arguments::jvm_flags_array(); 489 char** vm_args = Arguments::jvm_args_array(); 490 int num_flags = Arguments::num_jvm_flags(); 491 int num_args = Arguments::num_jvm_args(); 492 493 size_t length = 1; // null terminator 494 int i; 495 for (i = 0; i < num_flags; i++) { 496 length += strlen(vm_flags[i]); 497 } 498 for (i = 0; i < num_args; i++) { 499 length += strlen(vm_args[i]); 500 } 501 // add a space between each argument 502 length += num_flags + num_args - 1; 503 504 // Return the list of input arguments passed to the VM 505 // and preserve the order that the VM processes. 506 char* args = NEW_RESOURCE_ARRAY(char, length); 507 args[0] = '\0'; 508 // concatenate all jvm_flags 509 if (num_flags > 0) { 510 strcat(args, vm_flags[0]); 511 for (i = 1; i < num_flags; i++) { 512 strcat(args, " "); 513 strcat(args, vm_flags[i]); 514 } 515 } 516 517 if (num_args > 0 && num_flags > 0) { 518 // append a space if args already contains one or more jvm_flags 519 strcat(args, " "); 520 } 521 522 // concatenate all jvm_args 523 if (num_args > 0) { 524 strcat(args, vm_args[0]); 525 for (i = 1; i < num_args; i++) { 526 strcat(args, " "); 527 strcat(args, vm_args[i]); 528 } 529 } 530 531 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); 532 return JNIHandles::make_local(env, hargs()); 533JVM_END 534 535// Returns an array of java.lang.String object containing the input arguments to the VM. 536JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) 537 ResourceMark rm(THREAD); 538 539 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 540 return NULL; 541 } 542 543 char** vm_flags = Arguments::jvm_flags_array(); 544 char** vm_args = Arguments::jvm_args_array(); 545 int num_flags = Arguments::num_jvm_flags(); 546 int num_args = Arguments::num_jvm_args(); 547 548 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); 549 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); 550 objArrayHandle result_h(THREAD, r); 551 552 int index = 0; 553 for (int j = 0; j < num_flags; j++, index++) { 554 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 555 result_h->obj_at_put(index, h()); 556 } 557 for (int i = 0; i < num_args; i++, index++) { 558 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 559 result_h->obj_at_put(index, h()); 560 } 561 return (jobjectArray) JNIHandles::make_local(env, result_h()); 562JVM_END 563 564// Returns an array of java/lang/management/MemoryPoolMXBean object 565// one for each memory pool if obj == null; otherwise returns 566// an array of memory pools for a given memory manager if 567// it is a valid memory manager. 568JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) 569 ResourceMark rm(THREAD); 570 571 int num_memory_pools; 572 MemoryManager* mgr = NULL; 573 if (obj == NULL) { 574 num_memory_pools = MemoryService::num_memory_pools(); 575 } else { 576 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); 577 if (mgr == NULL) { 578 return NULL; 579 } 580 num_memory_pools = mgr->num_memory_pools(); 581 } 582 583 // Allocate the resulting MemoryPoolMXBean[] object 584 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); 585 instanceKlassHandle ik (THREAD, k); 586 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); 587 objArrayHandle poolArray(THREAD, r); 588 589 if (mgr == NULL) { 590 // Get all memory pools 591 for (int i = 0; i < num_memory_pools; i++) { 592 MemoryPool* pool = MemoryService::get_memory_pool(i); 593 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 594 instanceHandle ph(THREAD, p); 595 poolArray->obj_at_put(i, ph()); 596 } 597 } else { 598 // Get memory pools managed by a given memory manager 599 for (int i = 0; i < num_memory_pools; i++) { 600 MemoryPool* pool = mgr->get_memory_pool(i); 601 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 602 instanceHandle ph(THREAD, p); 603 poolArray->obj_at_put(i, ph()); 604 } 605 } 606 return (jobjectArray) JNIHandles::make_local(env, poolArray()); 607JVM_END 608 609// Returns an array of java/lang/management/MemoryManagerMXBean object 610// one for each memory manager if obj == null; otherwise returns 611// an array of memory managers for a given memory pool if 612// it is a valid memory pool. 613JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) 614 ResourceMark rm(THREAD); 615 616 int num_mgrs; 617 MemoryPool* pool = NULL; 618 if (obj == NULL) { 619 num_mgrs = MemoryService::num_memory_managers(); 620 } else { 621 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 622 if (pool == NULL) { 623 return NULL; 624 } 625 num_mgrs = pool->num_memory_managers(); 626 } 627 628 // Allocate the resulting MemoryManagerMXBean[] object 629 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); 630 instanceKlassHandle ik (THREAD, k); 631 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); 632 objArrayHandle mgrArray(THREAD, r); 633 634 if (pool == NULL) { 635 // Get all memory managers 636 for (int i = 0; i < num_mgrs; i++) { 637 MemoryManager* mgr = MemoryService::get_memory_manager(i); 638 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 639 instanceHandle ph(THREAD, p); 640 mgrArray->obj_at_put(i, ph()); 641 } 642 } else { 643 // Get memory managers for a given memory pool 644 for (int i = 0; i < num_mgrs; i++) { 645 MemoryManager* mgr = pool->get_memory_manager(i); 646 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 647 instanceHandle ph(THREAD, p); 648 mgrArray->obj_at_put(i, ph()); 649 } 650 } 651 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); 652JVM_END 653 654 655// Returns a java/lang/management/MemoryUsage object containing the memory usage 656// of a given memory pool. 657JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) 658 ResourceMark rm(THREAD); 659 660 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 661 if (pool != NULL) { 662 MemoryUsage usage = pool->get_memory_usage(); 663 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 664 return JNIHandles::make_local(env, h()); 665 } else { 666 return NULL; 667 } 668JVM_END 669 670// Returns a java/lang/management/MemoryUsage object containing the memory usage 671// of a given memory pool. 672JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) 673 ResourceMark rm(THREAD); 674 675 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 676 if (pool != NULL) { 677 MemoryUsage usage = pool->get_peak_memory_usage(); 678 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 679 return JNIHandles::make_local(env, h()); 680 } else { 681 return NULL; 682 } 683JVM_END 684 685// Returns a java/lang/management/MemoryUsage object containing the memory usage 686// of a given memory pool after most recent GC. 687JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) 688 ResourceMark rm(THREAD); 689 690 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 691 if (pool != NULL && pool->is_collected_pool()) { 692 MemoryUsage usage = pool->get_last_collection_usage(); 693 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 694 return JNIHandles::make_local(env, h()); 695 } else { 696 return NULL; 697 } 698JVM_END 699 700// Sets the memory pool sensor for a threshold type 701JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) 702 if (obj == NULL || sensorObj == NULL) { 703 THROW(vmSymbols::java_lang_NullPointerException()); 704 } 705 706 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK); 707 oop s = JNIHandles::resolve(sensorObj); 708 assert(s->is_instance(), "Sensor should be an instanceOop"); 709 instanceHandle sensor_h(THREAD, (instanceOop) s); 710 if (!sensor_h->is_a(sensor_klass)) { 711 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 712 "Sensor is not an instance of sun.management.Sensor class"); 713 } 714 715 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); 716 assert(mpool != NULL, "MemoryPool should exist"); 717 718 switch (type) { 719 case JMM_USAGE_THRESHOLD_HIGH: 720 case JMM_USAGE_THRESHOLD_LOW: 721 // have only one sensor for threshold high and low 722 mpool->set_usage_sensor_obj(sensor_h); 723 break; 724 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 725 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 726 // have only one sensor for threshold high and low 727 mpool->set_gc_usage_sensor_obj(sensor_h); 728 break; 729 default: 730 assert(false, "Unrecognized type"); 731 } 732 733JVM_END 734 735 736// Sets the threshold of a given memory pool. 737// Returns the previous threshold. 738// 739// Input parameters: 740// pool - the MemoryPoolMXBean object 741// type - threshold type 742// threshold - the new threshold (must not be negative) 743// 744JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) 745 if (threshold < 0) { 746 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 747 "Invalid threshold value", 748 -1); 749 } 750 751 if ((size_t)threshold > max_uintx) { 752 stringStream st; 753 st.print("Invalid valid threshold value. Threshold value (" JLONG_FORMAT ") > max value of size_t (" UINTX_FORMAT ")", threshold, max_uintx); 754 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); 755 } 756 757 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); 758 assert(pool != NULL, "MemoryPool should exist"); 759 760 jlong prev = 0; 761 switch (type) { 762 case JMM_USAGE_THRESHOLD_HIGH: 763 if (!pool->usage_threshold()->is_high_threshold_supported()) { 764 return -1; 765 } 766 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); 767 break; 768 769 case JMM_USAGE_THRESHOLD_LOW: 770 if (!pool->usage_threshold()->is_low_threshold_supported()) { 771 return -1; 772 } 773 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); 774 break; 775 776 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 777 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { 778 return -1; 779 } 780 // return and the new threshold is effective for the next GC 781 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); 782 783 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 784 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { 785 return -1; 786 } 787 // return and the new threshold is effective for the next GC 788 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); 789 790 default: 791 assert(false, "Unrecognized type"); 792 return -1; 793 } 794 795 // When the threshold is changed, reevaluate if the low memory 796 // detection is enabled. 797 if (prev != threshold) { 798 LowMemoryDetector::recompute_enabled_for_collected_pools(); 799 LowMemoryDetector::detect_low_memory(pool); 800 } 801 return prev; 802JVM_END 803 804// Returns a java/lang/management/MemoryUsage object representing 805// the memory usage for the heap or non-heap memory. 806JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) 807 ResourceMark rm(THREAD); 808 809 // Calculate the memory usage 810 size_t total_init = 0; 811 size_t total_used = 0; 812 size_t total_committed = 0; 813 size_t total_max = 0; 814 bool has_undefined_init_size = false; 815 bool has_undefined_max_size = false; 816 817 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 818 MemoryPool* pool = MemoryService::get_memory_pool(i); 819 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { 820 MemoryUsage u = pool->get_memory_usage(); 821 total_used += u.used(); 822 total_committed += u.committed(); 823 824 if (u.init_size() == (size_t)-1) { 825 has_undefined_init_size = true; 826 } 827 if (!has_undefined_init_size) { 828 total_init += u.init_size(); 829 } 830 831 if (u.max_size() == (size_t)-1) { 832 has_undefined_max_size = true; 833 } 834 if (!has_undefined_max_size) { 835 total_max += u.max_size(); 836 } 837 } 838 } 839 840 // if any one of the memory pool has undefined init_size or max_size, 841 // set it to -1 842 if (has_undefined_init_size) { 843 total_init = (size_t)-1; 844 } 845 if (has_undefined_max_size) { 846 total_max = (size_t)-1; 847 } 848 849 MemoryUsage usage((heap ? InitialHeapSize : total_init), 850 total_used, 851 total_committed, 852 (heap ? Universe::heap()->max_capacity() : total_max)); 853 854 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 855 return JNIHandles::make_local(env, obj()); 856JVM_END 857 858// Returns the boolean value of a given attribute. 859JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) 860 switch (att) { 861 case JMM_VERBOSE_GC: 862 return MemoryService::get_verbose(); 863 case JMM_VERBOSE_CLASS: 864 return ClassLoadingService::get_verbose(); 865 case JMM_THREAD_CONTENTION_MONITORING: 866 return ThreadService::is_thread_monitoring_contention(); 867 case JMM_THREAD_CPU_TIME: 868 return ThreadService::is_thread_cpu_time_enabled(); 869 case JMM_THREAD_ALLOCATED_MEMORY: 870 return ThreadService::is_thread_allocated_memory_enabled(); 871 default: 872 assert(0, "Unrecognized attribute"); 873 return false; 874 } 875JVM_END 876 877// Sets the given boolean attribute and returns the previous value. 878JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) 879 switch (att) { 880 case JMM_VERBOSE_GC: 881 return MemoryService::set_verbose(flag != 0); 882 case JMM_VERBOSE_CLASS: 883 return ClassLoadingService::set_verbose(flag != 0); 884 case JMM_THREAD_CONTENTION_MONITORING: 885 return ThreadService::set_thread_monitoring_contention(flag != 0); 886 case JMM_THREAD_CPU_TIME: 887 return ThreadService::set_thread_cpu_time_enabled(flag != 0); 888 case JMM_THREAD_ALLOCATED_MEMORY: 889 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); 890 default: 891 assert(0, "Unrecognized attribute"); 892 return false; 893 } 894JVM_END 895 896 897static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { 898 switch (att) { 899 case JMM_GC_TIME_MS: 900 return mgr->gc_time_ms(); 901 902 case JMM_GC_COUNT: 903 return mgr->gc_count(); 904 905 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: 906 // current implementation only has 1 ext attribute 907 return 1; 908 909 default: 910 assert(0, "Unrecognized GC attribute"); 911 return -1; 912 } 913} 914 915class VmThreadCountClosure: public ThreadClosure { 916 private: 917 int _count; 918 public: 919 VmThreadCountClosure() : _count(0) {}; 920 void do_thread(Thread* thread); 921 int count() { return _count; } 922}; 923 924void VmThreadCountClosure::do_thread(Thread* thread) { 925 // exclude externally visible JavaThreads 926 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 927 return; 928 } 929 930 _count++; 931} 932 933static jint get_vm_thread_count() { 934 VmThreadCountClosure vmtcc; 935 { 936 MutexLockerEx ml(Threads_lock); 937 Threads::threads_do(&vmtcc); 938 } 939 940 return vmtcc.count(); 941} 942 943static jint get_num_flags() { 944 // last flag entry is always NULL, so subtract 1 945 int nFlags = (int) Flag::numFlags - 1; 946 int count = 0; 947 for (int i = 0; i < nFlags; i++) { 948 Flag* flag = &Flag::flags[i]; 949 // Exclude the locked (diagnostic, experimental) flags 950 if (flag->is_unlocked() || flag->is_unlocker()) { 951 count++; 952 } 953 } 954 return count; 955} 956 957static jlong get_long_attribute(jmmLongAttribute att) { 958 switch (att) { 959 case JMM_CLASS_LOADED_COUNT: 960 return ClassLoadingService::loaded_class_count(); 961 962 case JMM_CLASS_UNLOADED_COUNT: 963 return ClassLoadingService::unloaded_class_count(); 964 965 case JMM_THREAD_TOTAL_COUNT: 966 return ThreadService::get_total_thread_count(); 967 968 case JMM_THREAD_LIVE_COUNT: 969 return ThreadService::get_live_thread_count(); 970 971 case JMM_THREAD_PEAK_COUNT: 972 return ThreadService::get_peak_thread_count(); 973 974 case JMM_THREAD_DAEMON_COUNT: 975 return ThreadService::get_daemon_thread_count(); 976 977 case JMM_JVM_INIT_DONE_TIME_MS: 978 return Management::vm_init_done_time(); 979 980 case JMM_JVM_UPTIME_MS: 981 return Management::ticks_to_ms(os::elapsed_counter()); 982 983 case JMM_COMPILE_TOTAL_TIME_MS: 984 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); 985 986 case JMM_OS_PROCESS_ID: 987 return os::current_process_id(); 988 989 // Hotspot-specific counters 990 case JMM_CLASS_LOADED_BYTES: 991 return ClassLoadingService::loaded_class_bytes(); 992 993 case JMM_CLASS_UNLOADED_BYTES: 994 return ClassLoadingService::unloaded_class_bytes(); 995 996 case JMM_SHARED_CLASS_LOADED_COUNT: 997 return ClassLoadingService::loaded_shared_class_count(); 998 999 case JMM_SHARED_CLASS_UNLOADED_COUNT: 1000 return ClassLoadingService::unloaded_shared_class_count(); 1001 1002 1003 case JMM_SHARED_CLASS_LOADED_BYTES: 1004 return ClassLoadingService::loaded_shared_class_bytes(); 1005 1006 case JMM_SHARED_CLASS_UNLOADED_BYTES: 1007 return ClassLoadingService::unloaded_shared_class_bytes(); 1008 1009 case JMM_TOTAL_CLASSLOAD_TIME_MS: 1010 return ClassLoader::classloader_time_ms(); 1011 1012 case JMM_VM_GLOBAL_COUNT: 1013 return get_num_flags(); 1014 1015 case JMM_SAFEPOINT_COUNT: 1016 return RuntimeService::safepoint_count(); 1017 1018 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: 1019 return RuntimeService::safepoint_sync_time_ms(); 1020 1021 case JMM_TOTAL_STOPPED_TIME_MS: 1022 return RuntimeService::safepoint_time_ms(); 1023 1024 case JMM_TOTAL_APP_TIME_MS: 1025 return RuntimeService::application_time_ms(); 1026 1027 case JMM_VM_THREAD_COUNT: 1028 return get_vm_thread_count(); 1029 1030 case JMM_CLASS_INIT_TOTAL_COUNT: 1031 return ClassLoader::class_init_count(); 1032 1033 case JMM_CLASS_INIT_TOTAL_TIME_MS: 1034 return ClassLoader::class_init_time_ms(); 1035 1036 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: 1037 return ClassLoader::class_verify_time_ms(); 1038 1039 case JMM_METHOD_DATA_SIZE_BYTES: 1040 return ClassLoadingService::class_method_data_size(); 1041 1042 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: 1043 return os::physical_memory(); 1044 1045 default: 1046 return -1; 1047 } 1048} 1049 1050 1051// Returns the long value of a given attribute. 1052JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) 1053 if (obj == NULL) { 1054 return get_long_attribute(att); 1055 } else { 1056 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); 1057 if (mgr != NULL) { 1058 return get_gc_attribute(mgr, att); 1059 } 1060 } 1061 return -1; 1062JVM_END 1063 1064// Gets the value of all attributes specified in the given array 1065// and sets the value in the result array. 1066// Returns the number of attributes found. 1067JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, 1068 jobject obj, 1069 jmmLongAttribute* atts, 1070 jint count, 1071 jlong* result)) 1072 1073 int num_atts = 0; 1074 if (obj == NULL) { 1075 for (int i = 0; i < count; i++) { 1076 result[i] = get_long_attribute(atts[i]); 1077 if (result[i] != -1) { 1078 num_atts++; 1079 } 1080 } 1081 } else { 1082 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); 1083 for (int i = 0; i < count; i++) { 1084 result[i] = get_gc_attribute(mgr, atts[i]); 1085 if (result[i] != -1) { 1086 num_atts++; 1087 } 1088 } 1089 } 1090 return num_atts; 1091JVM_END 1092 1093// Helper function to do thread dump for a specific list of threads 1094static void do_thread_dump(ThreadDumpResult* dump_result, 1095 typeArrayHandle ids_ah, // array of thread ID (long[]) 1096 int num_threads, 1097 int max_depth, 1098 bool with_locked_monitors, 1099 bool with_locked_synchronizers, 1100 TRAPS) { 1101 // no need to actually perform thread dump if no TIDs are specified 1102 if (num_threads == 0) return; 1103 1104 // First get an array of threadObj handles. 1105 // A JavaThread may terminate before we get the stack trace. 1106 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 1107 { 1108 MutexLockerEx ml(Threads_lock); 1109 for (int i = 0; i < num_threads; i++) { 1110 jlong tid = ids_ah->long_at(i); 1111 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid); 1112 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); 1113 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); 1114 thread_handle_array->append(threadObj_h); 1115 } 1116 } 1117 1118 // Obtain thread dumps and thread snapshot information 1119 VM_ThreadDump op(dump_result, 1120 thread_handle_array, 1121 num_threads, 1122 max_depth, /* stack depth */ 1123 with_locked_monitors, 1124 with_locked_synchronizers); 1125 VMThread::execute(&op); 1126} 1127 1128// Gets an array of ThreadInfo objects. Each element is the ThreadInfo 1129// for the thread ID specified in the corresponding entry in 1130// the given array of thread IDs; or NULL if the thread does not exist 1131// or has terminated. 1132// 1133// Input parameters: 1134// ids - array of thread IDs 1135// maxDepth - the maximum depth of stack traces to be dumped: 1136// maxDepth == -1 requests to dump entire stack trace. 1137// maxDepth == 0 requests no stack trace. 1138// infoArray - array of ThreadInfo objects 1139// 1140// QQQ - Why does this method return a value instead of void? 1141JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) 1142 // Check if threads is null 1143 if (ids == NULL || infoArray == NULL) { 1144 THROW_(vmSymbols::java_lang_NullPointerException(), -1); 1145 } 1146 1147 if (maxDepth < -1) { 1148 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1149 "Invalid maxDepth", -1); 1150 } 1151 1152 ResourceMark rm(THREAD); 1153 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1154 typeArrayHandle ids_ah(THREAD, ta); 1155 1156 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); 1157 objArrayOop oa = objArrayOop(infoArray_obj); 1158 objArrayHandle infoArray_h(THREAD, oa); 1159 1160 // validate the thread id array 1161 validate_thread_id_array(ids_ah, CHECK_0); 1162 1163 // validate the ThreadInfo[] parameters 1164 validate_thread_info_array(infoArray_h, CHECK_0); 1165 1166 // infoArray must be of the same length as the given array of thread IDs 1167 int num_threads = ids_ah->length(); 1168 if (num_threads != infoArray_h->length()) { 1169 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1170 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); 1171 } 1172 1173 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1174 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); 1175 1176 // Must use ThreadDumpResult to store the ThreadSnapshot. 1177 // GC may occur after the thread snapshots are taken but before 1178 // this function returns. The threadObj and other oops kept 1179 // in the ThreadSnapshot are marked and adjusted during GC. 1180 ThreadDumpResult dump_result(num_threads); 1181 1182 if (maxDepth == 0) { 1183 // no stack trace dumped - do not need to stop the world 1184 { 1185 MutexLockerEx ml(Threads_lock); 1186 for (int i = 0; i < num_threads; i++) { 1187 jlong tid = ids_ah->long_at(i); 1188 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid); 1189 ThreadSnapshot* ts; 1190 if (jt == NULL) { 1191 // if the thread does not exist or now it is terminated, 1192 // create dummy snapshot 1193 ts = new ThreadSnapshot(); 1194 } else { 1195 ts = new ThreadSnapshot(jt); 1196 } 1197 dump_result.add_thread_snapshot(ts); 1198 } 1199 } 1200 } else { 1201 // obtain thread dump with the specific list of threads with stack trace 1202 do_thread_dump(&dump_result, 1203 ids_ah, 1204 num_threads, 1205 maxDepth, 1206 false, /* no locked monitor */ 1207 false, /* no locked synchronizers */ 1208 CHECK_0); 1209 } 1210 1211 int num_snapshots = dump_result.num_snapshots(); 1212 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); 1213 int index = 0; 1214 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { 1215 // For each thread, create an java/lang/management/ThreadInfo object 1216 // and fill with the thread information 1217 1218 if (ts->threadObj() == NULL) { 1219 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1220 infoArray_h->obj_at_put(index, NULL); 1221 continue; 1222 } 1223 1224 // Create java.lang.management.ThreadInfo object 1225 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); 1226 infoArray_h->obj_at_put(index, info_obj); 1227 } 1228 return 0; 1229JVM_END 1230 1231// Dump thread info for the specified threads. 1232// It returns an array of ThreadInfo objects. Each element is the ThreadInfo 1233// for the thread ID specified in the corresponding entry in 1234// the given array of thread IDs; or NULL if the thread does not exist 1235// or has terminated. 1236// 1237// Input parameter: 1238// ids - array of thread IDs; NULL indicates all live threads 1239// locked_monitors - if true, dump locked object monitors 1240// locked_synchronizers - if true, dump locked JSR-166 synchronizers 1241// 1242JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) 1243 ResourceMark rm(THREAD); 1244 1245 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1246 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); 1247 1248 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); 1249 int num_threads = (ta != NULL ? ta->length() : 0); 1250 typeArrayHandle ids_ah(THREAD, ta); 1251 1252 ThreadDumpResult dump_result(num_threads); // can safepoint 1253 1254 if (ids_ah() != NULL) { 1255 1256 // validate the thread id array 1257 validate_thread_id_array(ids_ah, CHECK_NULL); 1258 1259 // obtain thread dump of a specific list of threads 1260 do_thread_dump(&dump_result, 1261 ids_ah, 1262 num_threads, 1263 -1, /* entire stack */ 1264 (locked_monitors ? true : false), /* with locked monitors */ 1265 (locked_synchronizers ? true : false), /* with locked synchronizers */ 1266 CHECK_NULL); 1267 } else { 1268 // obtain thread dump of all threads 1269 VM_ThreadDump op(&dump_result, 1270 -1, /* entire stack */ 1271 (locked_monitors ? true : false), /* with locked monitors */ 1272 (locked_synchronizers ? true : false) /* with locked synchronizers */); 1273 VMThread::execute(&op); 1274 } 1275 1276 int num_snapshots = dump_result.num_snapshots(); 1277 1278 // create the result ThreadInfo[] object 1279 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 1280 instanceKlassHandle ik (THREAD, k); 1281 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); 1282 objArrayHandle result_h(THREAD, r); 1283 1284 int index = 0; 1285 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { 1286 if (ts->threadObj() == NULL) { 1287 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1288 result_h->obj_at_put(index, NULL); 1289 continue; 1290 } 1291 1292 ThreadStackTrace* stacktrace = ts->get_stack_trace(); 1293 assert(stacktrace != NULL, "Must have a stack trace dumped"); 1294 1295 // Create Object[] filled with locked monitors 1296 // Create int[] filled with the stack depth where a monitor was locked 1297 int num_frames = stacktrace->get_stack_depth(); 1298 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); 1299 1300 // Count the total number of locked monitors 1301 for (int i = 0; i < num_frames; i++) { 1302 StackFrameInfo* frame = stacktrace->stack_frame_at(i); 1303 num_locked_monitors += frame->num_locked_monitors(); 1304 } 1305 1306 objArrayHandle monitors_array; 1307 typeArrayHandle depths_array; 1308 objArrayHandle synchronizers_array; 1309 1310 if (locked_monitors) { 1311 // Constructs Object[] and int[] to contain the object monitor and the stack depth 1312 // where the thread locked it 1313 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); 1314 objArrayHandle mh(THREAD, array); 1315 monitors_array = mh; 1316 1317 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); 1318 typeArrayHandle dh(THREAD, tarray); 1319 depths_array = dh; 1320 1321 int count = 0; 1322 int j = 0; 1323 for (int depth = 0; depth < num_frames; depth++) { 1324 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); 1325 int len = frame->num_locked_monitors(); 1326 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); 1327 for (j = 0; j < len; j++) { 1328 oop monitor = locked_monitors->at(j); 1329 assert(monitor != NULL, "must be a Java object"); 1330 monitors_array->obj_at_put(count, monitor); 1331 depths_array->int_at_put(count, depth); 1332 count++; 1333 } 1334 } 1335 1336 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); 1337 for (j = 0; j < jni_locked_monitors->length(); j++) { 1338 oop object = jni_locked_monitors->at(j); 1339 assert(object != NULL, "must be a Java object"); 1340 monitors_array->obj_at_put(count, object); 1341 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info 1342 depths_array->int_at_put(count, -1); 1343 count++; 1344 } 1345 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); 1346 } 1347 1348 if (locked_synchronizers) { 1349 // Create Object[] filled with locked JSR-166 synchronizers 1350 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); 1351 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); 1352 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); 1353 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); 1354 1355 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); 1356 objArrayHandle sh(THREAD, array); 1357 synchronizers_array = sh; 1358 1359 for (int k = 0; k < num_locked_synchronizers; k++) { 1360 synchronizers_array->obj_at_put(k, locks->at(k)); 1361 } 1362 } 1363 1364 // Create java.lang.management.ThreadInfo object 1365 instanceOop info_obj = Management::create_thread_info_instance(ts, 1366 monitors_array, 1367 depths_array, 1368 synchronizers_array, 1369 CHECK_NULL); 1370 result_h->obj_at_put(index, info_obj); 1371 } 1372 1373 return (jobjectArray) JNIHandles::make_local(env, result_h()); 1374JVM_END 1375 1376// Returns an array of Class objects. 1377JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) 1378 ResourceMark rm(THREAD); 1379 1380 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter 1381 1382 int num_classes = lce.num_loaded_classes(); 1383 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); 1384 objArrayHandle classes_ah(THREAD, r); 1385 1386 for (int i = 0; i < num_classes; i++) { 1387 KlassHandle kh = lce.get_klass(i); 1388 oop mirror = kh()->java_mirror(); 1389 classes_ah->obj_at_put(i, mirror); 1390 } 1391 1392 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); 1393JVM_END 1394 1395// Reset statistic. Return true if the requested statistic is reset. 1396// Otherwise, return false. 1397// 1398// Input parameters: 1399// obj - specify which instance the statistic associated with to be reset 1400// For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. 1401// For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. 1402// type - the type of statistic to be reset 1403// 1404JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) 1405 ResourceMark rm(THREAD); 1406 1407 switch (type) { 1408 case JMM_STAT_PEAK_THREAD_COUNT: 1409 ThreadService::reset_peak_thread_count(); 1410 return true; 1411 1412 case JMM_STAT_THREAD_CONTENTION_COUNT: 1413 case JMM_STAT_THREAD_CONTENTION_TIME: { 1414 jlong tid = obj.j; 1415 if (tid < 0) { 1416 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); 1417 } 1418 1419 // Look for the JavaThread of this given tid 1420 MutexLockerEx ml(Threads_lock); 1421 if (tid == 0) { 1422 // reset contention statistics for all threads if tid == 0 1423 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { 1424 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1425 ThreadService::reset_contention_count_stat(java_thread); 1426 } else { 1427 ThreadService::reset_contention_time_stat(java_thread); 1428 } 1429 } 1430 } else { 1431 // reset contention statistics for a given thread 1432 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(tid); 1433 if (java_thread == NULL) { 1434 return false; 1435 } 1436 1437 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1438 ThreadService::reset_contention_count_stat(java_thread); 1439 } else { 1440 ThreadService::reset_contention_time_stat(java_thread); 1441 } 1442 } 1443 return true; 1444 break; 1445 } 1446 case JMM_STAT_PEAK_POOL_USAGE: { 1447 jobject o = obj.l; 1448 if (o == NULL) { 1449 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1450 } 1451 1452 oop pool_obj = JNIHandles::resolve(o); 1453 assert(pool_obj->is_instance(), "Should be an instanceOop"); 1454 instanceHandle ph(THREAD, (instanceOop) pool_obj); 1455 1456 MemoryPool* pool = MemoryService::get_memory_pool(ph); 1457 if (pool != NULL) { 1458 pool->reset_peak_memory_usage(); 1459 return true; 1460 } 1461 break; 1462 } 1463 case JMM_STAT_GC_STAT: { 1464 jobject o = obj.l; 1465 if (o == NULL) { 1466 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1467 } 1468 1469 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); 1470 if (mgr != NULL) { 1471 mgr->reset_gc_stat(); 1472 return true; 1473 } 1474 break; 1475 } 1476 default: 1477 assert(0, "Unknown Statistic Type"); 1478 } 1479 return false; 1480JVM_END 1481 1482// Returns the fast estimate of CPU time consumed by 1483// a given thread (in nanoseconds). 1484// If thread_id == 0, return CPU time for the current thread. 1485JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) 1486 if (!os::is_thread_cpu_time_supported()) { 1487 return -1; 1488 } 1489 1490 if (thread_id < 0) { 1491 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1492 "Invalid thread ID", -1); 1493 } 1494 1495 JavaThread* java_thread = NULL; 1496 if (thread_id == 0) { 1497 // current thread 1498 return os::current_thread_cpu_time(); 1499 } else { 1500 MutexLockerEx ml(Threads_lock); 1501 java_thread = Threads::find_java_thread_from_java_tid(thread_id); 1502 if (java_thread != NULL) { 1503 return os::thread_cpu_time((Thread*) java_thread); 1504 } 1505 } 1506 return -1; 1507JVM_END 1508 1509// Returns a String array of all VM global flag names 1510JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) 1511 // last flag entry is always NULL, so subtract 1 1512 int nFlags = (int) Flag::numFlags - 1; 1513 // allocate a temp array 1514 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1515 nFlags, CHECK_0); 1516 objArrayHandle flags_ah(THREAD, r); 1517 int num_entries = 0; 1518 for (int i = 0; i < nFlags; i++) { 1519 Flag* flag = &Flag::flags[i]; 1520 // Exclude notproduct and develop flags in product builds. 1521 if (flag->is_constant_in_binary()) { 1522 continue; 1523 } 1524 // Exclude the locked (experimental, diagnostic) flags 1525 if (flag->is_unlocked() || flag->is_unlocker()) { 1526 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0); 1527 flags_ah->obj_at_put(num_entries, s()); 1528 num_entries++; 1529 } 1530 } 1531 1532 if (num_entries < nFlags) { 1533 // Return array of right length 1534 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); 1535 for(int i = 0; i < num_entries; i++) { 1536 res->obj_at_put(i, flags_ah->obj_at(i)); 1537 } 1538 return (jobjectArray)JNIHandles::make_local(env, res); 1539 } 1540 1541 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); 1542JVM_END 1543 1544// Utility function used by jmm_GetVMGlobals. Returns false if flag type 1545// can't be determined, true otherwise. If false is returned, then *global 1546// will be incomplete and invalid. 1547bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { 1548 Handle flag_name; 1549 if (name() == NULL) { 1550 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false); 1551 } else { 1552 flag_name = name; 1553 } 1554 global->name = (jstring)JNIHandles::make_local(env, flag_name()); 1555 1556 if (flag->is_bool()) { 1557 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; 1558 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; 1559 } else if (flag->is_int()) { 1560 global->value.j = (jlong)flag->get_int(); 1561 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1562 } else if (flag->is_uint()) { 1563 global->value.j = (jlong)flag->get_uint(); 1564 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1565 } else if (flag->is_intx()) { 1566 global->value.j = (jlong)flag->get_intx(); 1567 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1568 } else if (flag->is_uintx()) { 1569 global->value.j = (jlong)flag->get_uintx(); 1570 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1571 } else if (flag->is_uint64_t()) { 1572 global->value.j = (jlong)flag->get_uint64_t(); 1573 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1574 } else if (flag->is_double()) { 1575 global->value.d = (jdouble)flag->get_double(); 1576 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE; 1577 } else if (flag->is_size_t()) { 1578 global->value.j = (jlong)flag->get_size_t(); 1579 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1580 } else if (flag->is_ccstr()) { 1581 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); 1582 global->value.l = (jobject)JNIHandles::make_local(env, str()); 1583 global->type = JMM_VMGLOBAL_TYPE_JSTRING; 1584 } else { 1585 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; 1586 return false; 1587 } 1588 1589 global->writeable = flag->is_writeable(); 1590 global->external = flag->is_external(); 1591 switch (flag->get_origin()) { 1592 case Flag::DEFAULT: 1593 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; 1594 break; 1595 case Flag::COMMAND_LINE: 1596 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; 1597 break; 1598 case Flag::ENVIRON_VAR: 1599 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; 1600 break; 1601 case Flag::CONFIG_FILE: 1602 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; 1603 break; 1604 case Flag::MANAGEMENT: 1605 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; 1606 break; 1607 case Flag::ERGONOMIC: 1608 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; 1609 break; 1610 case Flag::ATTACH_ON_DEMAND: 1611 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND; 1612 break; 1613 default: 1614 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; 1615 } 1616 1617 return true; 1618} 1619 1620// Fill globals array of count length with jmmVMGlobal entries 1621// specified by names. If names == NULL, fill globals array 1622// with all Flags. Return value is number of entries 1623// created in globals. 1624// If a Flag with a given name in an array element does not 1625// exist, globals[i].name will be set to NULL. 1626JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, 1627 jobjectArray names, 1628 jmmVMGlobal *globals, 1629 jint count)) 1630 1631 1632 if (globals == NULL) { 1633 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1634 } 1635 1636 ResourceMark rm(THREAD); 1637 1638 if (names != NULL) { 1639 // return the requested globals 1640 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); 1641 objArrayHandle names_ah(THREAD, ta); 1642 // Make sure we have a String array 1643 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1644 if (element_klass != SystemDictionary::String_klass()) { 1645 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1646 "Array element type is not String class", 0); 1647 } 1648 1649 int names_length = names_ah->length(); 1650 int num_entries = 0; 1651 for (int i = 0; i < names_length && i < count; i++) { 1652 oop s = names_ah->obj_at(i); 1653 if (s == NULL) { 1654 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1655 } 1656 1657 Handle sh(THREAD, s); 1658 char* str = java_lang_String::as_utf8_string(s); 1659 Flag* flag = Flag::find_flag(str, strlen(str)); 1660 if (flag != NULL && 1661 add_global_entry(env, sh, &globals[i], flag, THREAD)) { 1662 num_entries++; 1663 } else { 1664 globals[i].name = NULL; 1665 } 1666 } 1667 return num_entries; 1668 } else { 1669 // return all globals if names == NULL 1670 1671 // last flag entry is always NULL, so subtract 1 1672 int nFlags = (int) Flag::numFlags - 1; 1673 Handle null_h; 1674 int num_entries = 0; 1675 for (int i = 0; i < nFlags && num_entries < count; i++) { 1676 Flag* flag = &Flag::flags[i]; 1677 // Exclude notproduct and develop flags in product builds. 1678 if (flag->is_constant_in_binary()) { 1679 continue; 1680 } 1681 // Exclude the locked (diagnostic, experimental) flags 1682 if ((flag->is_unlocked() || flag->is_unlocker()) && 1683 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { 1684 num_entries++; 1685 } 1686 } 1687 return num_entries; 1688 } 1689JVM_END 1690 1691JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) 1692 ResourceMark rm(THREAD); 1693 1694 oop fn = JNIHandles::resolve_external_guard(flag_name); 1695 if (fn == NULL) { 1696 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 1697 "The flag name cannot be null."); 1698 } 1699 char* name = java_lang_String::as_utf8_string(fn); 1700 1701 FormatBuffer<80> err_msg("%s", ""); 1702 int succeed = WriteableFlags::set_flag(name, new_value, Flag::MANAGEMENT, err_msg); 1703 1704 if (succeed != Flag::SUCCESS) { 1705 if (succeed == Flag::MISSING_VALUE) { 1706 // missing value causes NPE to be thrown 1707 THROW(vmSymbols::java_lang_NullPointerException()); 1708 } else { 1709 // all the other errors are reported as IAE with the appropriate error message 1710 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1711 err_msg.buffer()); 1712 } 1713 } 1714 assert(succeed == Flag::SUCCESS, "Setting flag should succeed"); 1715JVM_END 1716 1717class ThreadTimesClosure: public ThreadClosure { 1718 private: 1719 objArrayHandle _names_strings; 1720 char **_names_chars; 1721 typeArrayHandle _times; 1722 int _names_len; 1723 int _times_len; 1724 int _count; 1725 1726 public: 1727 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times); 1728 ~ThreadTimesClosure(); 1729 virtual void do_thread(Thread* thread); 1730 void do_unlocked(); 1731 int count() { return _count; } 1732}; 1733 1734ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, 1735 typeArrayHandle times) { 1736 assert(names() != NULL, "names was NULL"); 1737 assert(times() != NULL, "times was NULL"); 1738 _names_strings = names; 1739 _names_len = names->length(); 1740 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); 1741 _times = times; 1742 _times_len = times->length(); 1743 _count = 0; 1744} 1745 1746// 1747// Called with Threads_lock held 1748// 1749void ThreadTimesClosure::do_thread(Thread* thread) { 1750 assert(thread != NULL, "thread was NULL"); 1751 1752 // exclude externally visible JavaThreads 1753 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 1754 return; 1755 } 1756 1757 if (_count >= _names_len || _count >= _times_len) { 1758 // skip if the result array is not big enough 1759 return; 1760 } 1761 1762 EXCEPTION_MARK; 1763 ResourceMark rm(THREAD); // thread->name() uses ResourceArea 1764 1765 assert(thread->name() != NULL, "All threads should have a name"); 1766 _names_chars[_count] = os::strdup(thread->name()); 1767 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? 1768 os::thread_cpu_time(thread) : -1); 1769 _count++; 1770} 1771 1772// Called without Threads_lock, we can allocate String objects. 1773void ThreadTimesClosure::do_unlocked() { 1774 1775 EXCEPTION_MARK; 1776 for (int i = 0; i < _count; i++) { 1777 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); 1778 _names_strings->obj_at_put(i, s()); 1779 } 1780} 1781 1782ThreadTimesClosure::~ThreadTimesClosure() { 1783 for (int i = 0; i < _count; i++) { 1784 os::free(_names_chars[i]); 1785 } 1786 FREE_C_HEAP_ARRAY(char *, _names_chars); 1787} 1788 1789// Fills names with VM internal thread names and times with the corresponding 1790// CPU times. If names or times is NULL, a NullPointerException is thrown. 1791// If the element type of names is not String, an IllegalArgumentException is 1792// thrown. 1793// If an array is not large enough to hold all the entries, only the entries 1794// that fit will be returned. Return value is the number of VM internal 1795// threads entries. 1796JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, 1797 jobjectArray names, 1798 jlongArray times)) 1799 if (names == NULL || times == NULL) { 1800 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1801 } 1802 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); 1803 objArrayHandle names_ah(THREAD, na); 1804 1805 // Make sure we have a String array 1806 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1807 if (element_klass != SystemDictionary::String_klass()) { 1808 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1809 "Array element type is not String class", 0); 1810 } 1811 1812 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); 1813 typeArrayHandle times_ah(THREAD, ta); 1814 1815 ThreadTimesClosure ttc(names_ah, times_ah); 1816 { 1817 MutexLockerEx ml(Threads_lock); 1818 Threads::threads_do(&ttc); 1819 } 1820 ttc.do_unlocked(); 1821 return ttc.count(); 1822JVM_END 1823 1824static Handle find_deadlocks(bool object_monitors_only, TRAPS) { 1825 ResourceMark rm(THREAD); 1826 1827 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); 1828 VMThread::execute(&op); 1829 1830 DeadlockCycle* deadlocks = op.result(); 1831 if (deadlocks == NULL) { 1832 // no deadlock found and return 1833 return Handle(); 1834 } 1835 1836 int num_threads = 0; 1837 DeadlockCycle* cycle; 1838 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1839 num_threads += cycle->num_threads(); 1840 } 1841 1842 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); 1843 objArrayHandle threads_ah(THREAD, r); 1844 1845 int index = 0; 1846 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1847 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); 1848 int len = deadlock_threads->length(); 1849 for (int i = 0; i < len; i++) { 1850 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); 1851 index++; 1852 } 1853 } 1854 return threads_ah; 1855} 1856 1857// Finds cycles of threads that are deadlocked involved in object monitors 1858// and JSR-166 synchronizers. 1859// Returns an array of Thread objects which are in deadlock, if any. 1860// Otherwise, returns NULL. 1861// 1862// Input parameter: 1863// object_monitors_only - if true, only check object monitors 1864// 1865JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) 1866 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); 1867 return (jobjectArray) JNIHandles::make_local(env, result()); 1868JVM_END 1869 1870// Finds cycles of threads that are deadlocked on monitor locks 1871// Returns an array of Thread objects which are in deadlock, if any. 1872// Otherwise, returns NULL. 1873JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) 1874 Handle result = find_deadlocks(true, CHECK_0); 1875 return (jobjectArray) JNIHandles::make_local(env, result()); 1876JVM_END 1877 1878// Gets the information about GC extension attributes including 1879// the name of the attribute, its type, and a short description. 1880// 1881// Input parameters: 1882// mgr - GC memory manager 1883// info - caller allocated array of jmmExtAttributeInfo 1884// count - number of elements of the info array 1885// 1886// Returns the number of GC extension attributes filled in the info array; or 1887// -1 if info is not big enough 1888// 1889JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) 1890 // All GC memory managers have 1 attribute (number of GC threads) 1891 if (count == 0) { 1892 return 0; 1893 } 1894 1895 if (info == NULL) { 1896 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1897 } 1898 1899 info[0].name = "GcThreadCount"; 1900 info[0].type = 'I'; 1901 info[0].description = "Number of GC threads"; 1902 return 1; 1903JVM_END 1904 1905// verify the given array is an array of java/lang/management/MemoryUsage objects 1906// of a given length and return the objArrayOop 1907static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { 1908 if (array == NULL) { 1909 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1910 } 1911 1912 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); 1913 objArrayHandle array_h(THREAD, oa); 1914 1915 // array must be of the given length 1916 if (length != array_h->length()) { 1917 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1918 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); 1919 } 1920 1921 // check if the element of array is of type MemoryUsage class 1922 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); 1923 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass(); 1924 if (element_klass != usage_klass) { 1925 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1926 "The element type is not MemoryUsage class", 0); 1927 } 1928 1929 return array_h(); 1930} 1931 1932// Gets the statistics of the last GC of a given GC memory manager. 1933// Input parameters: 1934// obj - GarbageCollectorMXBean object 1935// gc_stat - caller allocated jmmGCStat where: 1936// a. before_gc_usage - array of MemoryUsage objects 1937// b. after_gc_usage - array of MemoryUsage objects 1938// c. gc_ext_attributes_values_size is set to the 1939// gc_ext_attribute_values array allocated 1940// d. gc_ext_attribute_values is a caller allocated array of jvalue. 1941// 1942// On return, 1943// gc_index == 0 indicates no GC statistics available 1944// 1945// before_gc_usage and after_gc_usage - filled with per memory pool 1946// before and after GC usage in the same order as the memory pools 1947// returned by GetMemoryPools for a given GC memory manager. 1948// num_gc_ext_attributes indicates the number of elements in 1949// the gc_ext_attribute_values array is filled; or 1950// -1 if the gc_ext_attributes_values array is not big enough 1951// 1952JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) 1953 ResourceMark rm(THREAD); 1954 1955 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { 1956 THROW(vmSymbols::java_lang_NullPointerException()); 1957 } 1958 1959 // Get the GCMemoryManager 1960 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 1961 1962 // Make a copy of the last GC statistics 1963 // GC may occur while constructing the last GC information 1964 int num_pools = MemoryService::num_memory_pools(); 1965 GCStatInfo stat(num_pools); 1966 if (mgr->get_last_gc_stat(&stat) == 0) { 1967 gc_stat->gc_index = 0; 1968 return; 1969 } 1970 1971 gc_stat->gc_index = stat.gc_index(); 1972 gc_stat->start_time = Management::ticks_to_ms(stat.start_time()); 1973 gc_stat->end_time = Management::ticks_to_ms(stat.end_time()); 1974 1975 // Current implementation does not have GC extension attributes 1976 gc_stat->num_gc_ext_attributes = 0; 1977 1978 // Fill the arrays of MemoryUsage objects with before and after GC 1979 // per pool memory usage 1980 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, 1981 num_pools, 1982 CHECK); 1983 objArrayHandle usage_before_gc_ah(THREAD, bu); 1984 1985 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, 1986 num_pools, 1987 CHECK); 1988 objArrayHandle usage_after_gc_ah(THREAD, au); 1989 1990 for (int i = 0; i < num_pools; i++) { 1991 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK); 1992 Handle after_usage; 1993 1994 MemoryUsage u = stat.after_gc_usage_for_pool(i); 1995 if (u.max_size() == 0 && u.used() > 0) { 1996 // If max size == 0, this pool is a survivor space. 1997 // Set max size = -1 since the pools will be swapped after GC. 1998 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); 1999 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); 2000 } else { 2001 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK); 2002 } 2003 usage_before_gc_ah->obj_at_put(i, before_usage()); 2004 usage_after_gc_ah->obj_at_put(i, after_usage()); 2005 } 2006 2007 if (gc_stat->gc_ext_attribute_values_size > 0) { 2008 // Current implementation only has 1 attribute (number of GC threads) 2009 // The type is 'I' 2010 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); 2011 } 2012JVM_END 2013 2014JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) 2015 ResourceMark rm(THREAD); 2016 // Get the GCMemoryManager 2017 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2018 mgr->set_notification_enabled(enabled?true:false); 2019JVM_END 2020 2021// Dump heap - Returns 0 if succeeds. 2022JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) 2023#if INCLUDE_SERVICES 2024 ResourceMark rm(THREAD); 2025 oop on = JNIHandles::resolve_external_guard(outputfile); 2026 if (on == NULL) { 2027 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2028 "Output file name cannot be null.", -1); 2029 } 2030 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1)); 2031 if (name == NULL) { 2032 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2033 "Output file name cannot be null.", -1); 2034 } 2035 HeapDumper dumper(live ? true : false); 2036 if (dumper.dump(name) != 0) { 2037 const char* errmsg = dumper.error_as_C_string(); 2038 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); 2039 } 2040 return 0; 2041#else // INCLUDE_SERVICES 2042 return -1; 2043#endif // INCLUDE_SERVICES 2044JVM_END 2045 2046JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) 2047 ResourceMark rm(THREAD); 2048 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean); 2049 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), 2050 dcmd_list->length(), CHECK_NULL); 2051 objArrayHandle cmd_array(THREAD, cmd_array_oop); 2052 for (int i = 0; i < dcmd_list->length(); i++) { 2053 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); 2054 cmd_array->obj_at_put(i, cmd_name); 2055 } 2056 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); 2057JVM_END 2058 2059JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, 2060 dcmdInfo* infoArray)) 2061 if (cmds == NULL || infoArray == NULL) { 2062 THROW(vmSymbols::java_lang_NullPointerException()); 2063 } 2064 2065 ResourceMark rm(THREAD); 2066 2067 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); 2068 objArrayHandle cmds_ah(THREAD, ca); 2069 2070 // Make sure we have a String array 2071 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass(); 2072 if (element_klass != SystemDictionary::String_klass()) { 2073 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2074 "Array element type is not String class"); 2075 } 2076 2077 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean); 2078 2079 int num_cmds = cmds_ah->length(); 2080 for (int i = 0; i < num_cmds; i++) { 2081 oop cmd = cmds_ah->obj_at(i); 2082 if (cmd == NULL) { 2083 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2084 "Command name cannot be null."); 2085 } 2086 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2087 if (cmd_name == NULL) { 2088 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2089 "Command name cannot be null."); 2090 } 2091 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); 2092 if (pos == -1) { 2093 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2094 "Unknown diagnostic command"); 2095 } 2096 DCmdInfo* info = info_list->at(pos); 2097 infoArray[i].name = info->name(); 2098 infoArray[i].description = info->description(); 2099 infoArray[i].impact = info->impact(); 2100 JavaPermission p = info->permission(); 2101 infoArray[i].permission_class = p._class; 2102 infoArray[i].permission_name = p._name; 2103 infoArray[i].permission_action = p._action; 2104 infoArray[i].num_arguments = info->num_arguments(); 2105 infoArray[i].enabled = info->is_enabled(); 2106 } 2107JVM_END 2108 2109JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, 2110 jstring command, dcmdArgInfo* infoArray)) 2111 ResourceMark rm(THREAD); 2112 oop cmd = JNIHandles::resolve_external_guard(command); 2113 if (cmd == NULL) { 2114 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2115 "Command line cannot be null."); 2116 } 2117 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2118 if (cmd_name == NULL) { 2119 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2120 "Command line content cannot be null."); 2121 } 2122 DCmd* dcmd = NULL; 2123 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name, 2124 strlen(cmd_name)); 2125 if (factory != NULL) { 2126 dcmd = factory->create_resource_instance(NULL); 2127 } 2128 if (dcmd == NULL) { 2129 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2130 "Unknown diagnostic command"); 2131 } 2132 DCmdMark mark(dcmd); 2133 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); 2134 if (array->length() == 0) { 2135 return; 2136 } 2137 for (int i = 0; i < array->length(); i++) { 2138 infoArray[i].name = array->at(i)->name(); 2139 infoArray[i].description = array->at(i)->description(); 2140 infoArray[i].type = array->at(i)->type(); 2141 infoArray[i].default_string = array->at(i)->default_string(); 2142 infoArray[i].mandatory = array->at(i)->is_mandatory(); 2143 infoArray[i].option = array->at(i)->is_option(); 2144 infoArray[i].multiple = array->at(i)->is_multiple(); 2145 infoArray[i].position = array->at(i)->position(); 2146 } 2147 return; 2148JVM_END 2149 2150JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) 2151 ResourceMark rm(THREAD); 2152 oop cmd = JNIHandles::resolve_external_guard(commandline); 2153 if (cmd == NULL) { 2154 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2155 "Command line cannot be null."); 2156 } 2157 char* cmdline = java_lang_String::as_utf8_string(cmd); 2158 if (cmdline == NULL) { 2159 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2160 "Command line content cannot be null."); 2161 } 2162 bufferedStream output; 2163 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL); 2164 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); 2165 return (jstring) JNIHandles::make_local(env, result); 2166JVM_END 2167 2168JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled)) 2169 DCmdFactory::set_jmx_notification_enabled(enabled?true:false); 2170JVM_END 2171 2172jlong Management::ticks_to_ms(jlong ticks) { 2173 assert(os::elapsed_frequency() > 0, "Must be non-zero"); 2174 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) 2175 * (double)1000.0); 2176} 2177#endif // INCLUDE_MANAGEMENT 2178 2179// Gets an array containing the amount of memory allocated on the Java 2180// heap for a set of threads (in bytes). Each element of the array is 2181// the amount of memory allocated for the thread ID specified in the 2182// corresponding entry in the given array of thread IDs; or -1 if the 2183// thread does not exist or has terminated. 2184JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, 2185 jlongArray sizeArray)) 2186 // Check if threads is null 2187 if (ids == NULL || sizeArray == NULL) { 2188 THROW(vmSymbols::java_lang_NullPointerException()); 2189 } 2190 2191 ResourceMark rm(THREAD); 2192 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 2193 typeArrayHandle ids_ah(THREAD, ta); 2194 2195 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); 2196 typeArrayHandle sizeArray_h(THREAD, sa); 2197 2198 // validate the thread id array 2199 validate_thread_id_array(ids_ah, CHECK); 2200 2201 // sizeArray must be of the same length as the given array of thread IDs 2202 int num_threads = ids_ah->length(); 2203 if (num_threads != sizeArray_h->length()) { 2204 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2205 "The length of the given long array does not match the length of " 2206 "the given array of thread IDs"); 2207 } 2208 2209 MutexLockerEx ml(Threads_lock); 2210 for (int i = 0; i < num_threads; i++) { 2211 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i)); 2212 if (java_thread != NULL) { 2213 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); 2214 } 2215 } 2216JVM_END 2217 2218// Returns the CPU time consumed by a given thread (in nanoseconds). 2219// If thread_id == 0, CPU time for the current thread is returned. 2220// If user_sys_cpu_time = true, user level and system CPU time of 2221// a given thread is returned; otherwise, only user level CPU time 2222// is returned. 2223JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) 2224 if (!os::is_thread_cpu_time_supported()) { 2225 return -1; 2226 } 2227 2228 if (thread_id < 0) { 2229 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2230 "Invalid thread ID", -1); 2231 } 2232 2233 JavaThread* java_thread = NULL; 2234 if (thread_id == 0) { 2235 // current thread 2236 return os::current_thread_cpu_time(user_sys_cpu_time != 0); 2237 } else { 2238 MutexLockerEx ml(Threads_lock); 2239 java_thread = Threads::find_java_thread_from_java_tid(thread_id); 2240 if (java_thread != NULL) { 2241 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); 2242 } 2243 } 2244 return -1; 2245JVM_END 2246 2247// Gets an array containing the CPU times consumed by a set of threads 2248// (in nanoseconds). Each element of the array is the CPU time for the 2249// thread ID specified in the corresponding entry in the given array 2250// of thread IDs; or -1 if the thread does not exist or has terminated. 2251// If user_sys_cpu_time = true, the sum of user level and system CPU time 2252// for the given thread is returned; otherwise, only user level CPU time 2253// is returned. 2254JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, 2255 jlongArray timeArray, 2256 jboolean user_sys_cpu_time)) 2257 // Check if threads is null 2258 if (ids == NULL || timeArray == NULL) { 2259 THROW(vmSymbols::java_lang_NullPointerException()); 2260 } 2261 2262 ResourceMark rm(THREAD); 2263 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 2264 typeArrayHandle ids_ah(THREAD, ta); 2265 2266 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); 2267 typeArrayHandle timeArray_h(THREAD, tia); 2268 2269 // validate the thread id array 2270 validate_thread_id_array(ids_ah, CHECK); 2271 2272 // timeArray must be of the same length as the given array of thread IDs 2273 int num_threads = ids_ah->length(); 2274 if (num_threads != timeArray_h->length()) { 2275 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2276 "The length of the given long array does not match the length of " 2277 "the given array of thread IDs"); 2278 } 2279 2280 MutexLockerEx ml(Threads_lock); 2281 for (int i = 0; i < num_threads; i++) { 2282 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i)); 2283 if (java_thread != NULL) { 2284 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, 2285 user_sys_cpu_time != 0)); 2286 } 2287 } 2288JVM_END 2289 2290 2291 2292#if INCLUDE_MANAGEMENT 2293const struct jmmInterface_1_ jmm_interface = { 2294 NULL, 2295 NULL, 2296 jmm_GetVersion, 2297 jmm_GetOptionalSupport, 2298 jmm_GetInputArguments, 2299 jmm_GetThreadInfo, 2300 jmm_GetInputArgumentArray, 2301 jmm_GetMemoryPools, 2302 jmm_GetMemoryManagers, 2303 jmm_GetMemoryPoolUsage, 2304 jmm_GetPeakMemoryPoolUsage, 2305 jmm_GetThreadAllocatedMemory, 2306 jmm_GetMemoryUsage, 2307 jmm_GetLongAttribute, 2308 jmm_GetBoolAttribute, 2309 jmm_SetBoolAttribute, 2310 jmm_GetLongAttributes, 2311 jmm_FindMonitorDeadlockedThreads, 2312 jmm_GetThreadCpuTime, 2313 jmm_GetVMGlobalNames, 2314 jmm_GetVMGlobals, 2315 jmm_GetInternalThreadTimes, 2316 jmm_ResetStatistic, 2317 jmm_SetPoolSensor, 2318 jmm_SetPoolThreshold, 2319 jmm_GetPoolCollectionUsage, 2320 jmm_GetGCExtAttributeInfo, 2321 jmm_GetLastGCStat, 2322 jmm_GetThreadCpuTimeWithKind, 2323 jmm_GetThreadCpuTimesWithKind, 2324 jmm_DumpHeap0, 2325 jmm_FindDeadlockedThreads, 2326 jmm_SetVMGlobal, 2327 NULL, 2328 jmm_DumpThreads, 2329 jmm_SetGCNotificationEnabled, 2330 jmm_GetDiagnosticCommands, 2331 jmm_GetDiagnosticCommandInfo, 2332 jmm_GetDiagnosticCommandArgumentsInfo, 2333 jmm_ExecuteDiagnosticCommand, 2334 jmm_SetDiagnosticFrameworkNotificationEnabled 2335}; 2336#endif // INCLUDE_MANAGEMENT 2337 2338void* Management::get_jmm_interface(int version) { 2339#if INCLUDE_MANAGEMENT 2340 if (version == JMM_VERSION_1_0) { 2341 return (void*) &jmm_interface; 2342 } 2343#endif // INCLUDE_MANAGEMENT 2344 return NULL; 2345} 2346