management.cpp revision 7331:110ec5963eb1
1/* 2 * Copyright (c) 2003, 2014, 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 "runtime/thread.inline.hpp" 43#include "services/classLoadingService.hpp" 44#include "services/diagnosticCommand.hpp" 45#include "services/diagnosticFramework.hpp" 46#include "services/heapDumper.hpp" 47#include "services/jmm.h" 48#include "services/lowMemoryDetector.hpp" 49#include "services/gcNotifier.hpp" 50#include "services/nmtDCmd.hpp" 51#include "services/management.hpp" 52#include "services/memoryManager.hpp" 53#include "services/memoryPool.hpp" 54#include "services/memoryService.hpp" 55#include "services/runtimeService.hpp" 56#include "services/threadService.hpp" 57#include "utilities/macros.hpp" 58 59PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 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::_sensor_klass = NULL; 66Klass* Management::_threadInfo_klass = NULL; 67Klass* Management::_memoryUsage_klass = NULL; 68Klass* Management::_memoryPoolMXBean_klass = NULL; 69Klass* Management::_memoryManagerMXBean_klass = NULL; 70Klass* Management::_garbageCollectorMXBean_klass = NULL; 71Klass* Management::_managementFactory_klass = NULL; 72Klass* Management::_garbageCollectorImpl_klass = NULL; 73Klass* Management::_gcInfo_klass = NULL; 74Klass* Management::_diagnosticCommandImpl_klass = NULL; 75Klass* Management::_managementFactoryHelper_klass = NULL; 76 77 78jmmOptionalSupport Management::_optional_support = {0}; 79TimeStamp Management::_stamp; 80 81void management_init() { 82#if INCLUDE_MANAGEMENT 83 Management::init(); 84 ThreadService::init(); 85 RuntimeService::init(); 86 ClassLoadingService::init(); 87#else 88 ThreadService::init(); 89 // Make sure the VM version is initialized 90 // This is normally called by RuntimeService::init(). 91 // Since that is conditionalized out, we need to call it here. 92 Abstract_VM_Version::initialize(); 93#endif // INCLUDE_MANAGEMENT 94} 95 96#if INCLUDE_MANAGEMENT 97 98void Management::init() { 99 EXCEPTION_MARK; 100 101 // These counters are for java.lang.management API support. 102 // They are created even if -XX:-UsePerfData is set and in 103 // that case, they will be allocated on C heap. 104 105 _begin_vm_creation_time = 106 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", 107 PerfData::U_None, CHECK); 108 109 _end_vm_creation_time = 110 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", 111 PerfData::U_None, CHECK); 112 113 _vm_init_done_time = 114 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", 115 PerfData::U_None, CHECK); 116 117 // Initialize optional support 118 _optional_support.isLowMemoryDetectionSupported = 1; 119 _optional_support.isCompilationTimeMonitoringSupported = 1; 120 _optional_support.isThreadContentionMonitoringSupported = 1; 121 122 if (os::is_thread_cpu_time_supported()) { 123 _optional_support.isCurrentThreadCpuTimeSupported = 1; 124 _optional_support.isOtherThreadCpuTimeSupported = 1; 125 } else { 126 _optional_support.isCurrentThreadCpuTimeSupported = 0; 127 _optional_support.isOtherThreadCpuTimeSupported = 0; 128 } 129 130 _optional_support.isBootClassPathSupported = 1; 131 _optional_support.isObjectMonitorUsageSupported = 1; 132#if INCLUDE_SERVICES 133 // This depends on the heap inspector 134 _optional_support.isSynchronizerUsageSupported = 1; 135#endif // INCLUDE_SERVICES 136 _optional_support.isThreadAllocatedMemorySupported = 1; 137 _optional_support.isRemoteDiagnosticCommandsSupported = 1; 138 139 // Registration of the diagnostic commands 140 DCmdRegistrant::register_dcmds(); 141 DCmdRegistrant::register_dcmds_ext(); 142 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 143 | DCmd_Source_MBean; 144 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 145} 146 147void Management::initialize(TRAPS) { 148 // Start the service thread 149 ServiceThread::initialize(); 150 151 if (ManagementServer) { 152 ResourceMark rm(THREAD); 153 HandleMark hm(THREAD); 154 155 // Load and initialize the sun.management.Agent class 156 // invoke startAgent method to start the management server 157 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 158 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_management_Agent(), 159 loader, 160 Handle(), 161 THREAD); 162 if (k == NULL) { 163 vm_exit_during_initialization("Management agent initialization failure: " 164 "class sun.management.Agent not found."); 165 } 166 instanceKlassHandle ik (THREAD, k); 167 168 JavaValue result(T_VOID); 169 JavaCalls::call_static(&result, 170 ik, 171 vmSymbols::startAgent_name(), 172 vmSymbols::void_method_signature(), 173 CHECK); 174 } 175} 176 177void Management::get_optional_support(jmmOptionalSupport* support) { 178 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); 179} 180 181Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) { 182 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); 183 instanceKlassHandle ik (THREAD, k); 184 if (ik->should_be_initialized()) { 185 ik->initialize(CHECK_NULL); 186 } 187 // If these classes change to not be owned by the boot loader, they need 188 // to be walked to keep their class loader alive in oops_do. 189 assert(ik->class_loader() == NULL, "need to follow in oops_do"); 190 return ik(); 191} 192 193void Management::record_vm_startup_time(jlong begin, jlong duration) { 194 // if the performance counter is not initialized, 195 // then vm initialization failed; simply return. 196 if (_begin_vm_creation_time == NULL) return; 197 198 _begin_vm_creation_time->set_value(begin); 199 _end_vm_creation_time->set_value(begin + duration); 200 PerfMemory::set_accessible(true); 201} 202 203jlong Management::timestamp() { 204 TimeStamp t; 205 t.update(); 206 return t.ticks() - _stamp.ticks(); 207} 208 209void Management::oops_do(OopClosure* f) { 210 MemoryService::oops_do(f); 211 ThreadService::oops_do(f); 212} 213 214Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) { 215 if (_threadInfo_klass == NULL) { 216 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); 217 } 218 return _threadInfo_klass; 219} 220 221Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) { 222 if (_memoryUsage_klass == NULL) { 223 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); 224 } 225 return _memoryUsage_klass; 226} 227 228Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { 229 if (_memoryPoolMXBean_klass == NULL) { 230 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); 231 } 232 return _memoryPoolMXBean_klass; 233} 234 235Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { 236 if (_memoryManagerMXBean_klass == NULL) { 237 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); 238 } 239 return _memoryManagerMXBean_klass; 240} 241 242Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { 243 if (_garbageCollectorMXBean_klass == NULL) { 244 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); 245 } 246 return _garbageCollectorMXBean_klass; 247} 248 249Klass* Management::sun_management_Sensor_klass(TRAPS) { 250 if (_sensor_klass == NULL) { 251 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); 252 } 253 return _sensor_klass; 254} 255 256Klass* Management::sun_management_ManagementFactory_klass(TRAPS) { 257 if (_managementFactory_klass == NULL) { 258 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); 259 } 260 return _managementFactory_klass; 261} 262 263Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { 264 if (_garbageCollectorImpl_klass == NULL) { 265 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); 266 } 267 return _garbageCollectorImpl_klass; 268} 269 270Klass* Management::com_sun_management_GcInfo_klass(TRAPS) { 271 if (_gcInfo_klass == NULL) { 272 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); 273 } 274 return _gcInfo_klass; 275} 276 277Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) { 278 if (_diagnosticCommandImpl_klass == NULL) { 279 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL); 280 } 281 return _diagnosticCommandImpl_klass; 282} 283 284Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) { 285 if (_managementFactoryHelper_klass == NULL) { 286 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL); 287 } 288 return _managementFactoryHelper_klass; 289} 290 291static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { 292 Handle snapshot_thread(THREAD, snapshot->threadObj()); 293 294 jlong contended_time; 295 jlong waited_time; 296 if (ThreadService::is_thread_monitoring_contention()) { 297 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); 298 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); 299 } else { 300 // set them to -1 if thread contention monitoring is disabled. 301 contended_time = max_julong; 302 waited_time = max_julong; 303 } 304 305 int thread_status = snapshot->thread_status(); 306 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); 307 if (snapshot->is_ext_suspended()) { 308 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; 309 } 310 if (snapshot->is_in_native()) { 311 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; 312 } 313 314 ThreadStackTrace* st = snapshot->get_stack_trace(); 315 Handle stacktrace_h; 316 if (st != NULL) { 317 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); 318 } else { 319 stacktrace_h = Handle(); 320 } 321 322 args->push_oop(snapshot_thread); 323 args->push_int(thread_status); 324 args->push_oop(Handle(THREAD, snapshot->blocker_object())); 325 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); 326 args->push_long(snapshot->contended_enter_count()); 327 args->push_long(contended_time); 328 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); 329 args->push_long(waited_time); 330 args->push_oop(stacktrace_h); 331} 332 333// Helper function to construct a ThreadInfo object 334instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { 335 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 336 instanceKlassHandle ik (THREAD, k); 337 338 JavaValue result(T_VOID); 339 JavaCallArguments args(14); 340 341 // First allocate a ThreadObj object and 342 // push the receiver as the first argument 343 Handle element = ik->allocate_instance_handle(CHECK_NULL); 344 args.push_oop(element); 345 346 // initialize the arguments for the ThreadInfo constructor 347 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 348 349 // Call ThreadInfo constructor with no locked monitors and synchronizers 350 JavaCalls::call_special(&result, 351 ik, 352 vmSymbols::object_initializer_name(), 353 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), 354 &args, 355 CHECK_NULL); 356 357 return (instanceOop) element(); 358} 359 360instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, 361 objArrayHandle monitors_array, 362 typeArrayHandle depths_array, 363 objArrayHandle synchronizers_array, 364 TRAPS) { 365 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 366 instanceKlassHandle ik (THREAD, k); 367 368 JavaValue result(T_VOID); 369 JavaCallArguments args(17); 370 371 // First allocate a ThreadObj object and 372 // push the receiver as the first argument 373 Handle element = ik->allocate_instance_handle(CHECK_NULL); 374 args.push_oop(element); 375 376 // initialize the arguments for the ThreadInfo constructor 377 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 378 379 // push the locked monitors and synchronizers in the arguments 380 args.push_oop(monitors_array); 381 args.push_oop(depths_array); 382 args.push_oop(synchronizers_array); 383 384 // Call ThreadInfo constructor with locked monitors and synchronizers 385 JavaCalls::call_special(&result, 386 ik, 387 vmSymbols::object_initializer_name(), 388 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), 389 &args, 390 CHECK_NULL); 391 392 return (instanceOop) element(); 393} 394 395 396static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { 397 if (mgr == NULL) { 398 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 399 } 400 oop mgr_obj = JNIHandles::resolve(mgr); 401 instanceHandle h(THREAD, (instanceOop) mgr_obj); 402 403 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); 404 if (!h->is_a(k)) { 405 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 406 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", 407 NULL); 408 } 409 410 MemoryManager* gc = MemoryService::get_memory_manager(h); 411 if (gc == NULL || !gc->is_gc_memory_manager()) { 412 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 413 "Invalid GC memory manager", 414 NULL); 415 } 416 return (GCMemoryManager*) gc; 417} 418 419static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { 420 if (obj == NULL) { 421 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 422 } 423 424 oop pool_obj = JNIHandles::resolve(obj); 425 assert(pool_obj->is_instance(), "Should be an instanceOop"); 426 instanceHandle ph(THREAD, (instanceOop) pool_obj); 427 428 return MemoryService::get_memory_pool(ph); 429} 430 431#endif // INCLUDE_MANAGEMENT 432 433static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { 434 int num_threads = ids_ah->length(); 435 436 // Validate input thread IDs 437 int i = 0; 438 for (i = 0; i < num_threads; i++) { 439 jlong tid = ids_ah->long_at(i); 440 if (tid <= 0) { 441 // throw exception if invalid thread id. 442 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 443 "Invalid thread ID entry"); 444 } 445 } 446} 447 448#if INCLUDE_MANAGEMENT 449 450static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { 451 // check if the element of infoArray is of type ThreadInfo class 452 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); 453 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass(); 454 if (element_klass != threadinfo_klass) { 455 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 456 "infoArray element type is not ThreadInfo class"); 457 } 458} 459 460 461static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { 462 if (obj == NULL) { 463 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 464 } 465 466 oop mgr_obj = JNIHandles::resolve(obj); 467 assert(mgr_obj->is_instance(), "Should be an instanceOop"); 468 instanceHandle mh(THREAD, (instanceOop) mgr_obj); 469 470 return MemoryService::get_memory_manager(mh); 471} 472 473// Returns a version string and sets major and minor version if 474// the input parameters are non-null. 475JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) 476 return JMM_VERSION; 477JVM_END 478 479// Gets the list of VM monitoring and management optional supports 480// Returns 0 if succeeded; otherwise returns non-zero. 481JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) 482 if (support == NULL) { 483 return -1; 484 } 485 Management::get_optional_support(support); 486 return 0; 487JVM_END 488 489// Returns a java.lang.String object containing the input arguments to the VM. 490JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) 491 ResourceMark rm(THREAD); 492 493 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 494 return NULL; 495 } 496 497 char** vm_flags = Arguments::jvm_flags_array(); 498 char** vm_args = Arguments::jvm_args_array(); 499 int num_flags = Arguments::num_jvm_flags(); 500 int num_args = Arguments::num_jvm_args(); 501 502 size_t length = 1; // null terminator 503 int i; 504 for (i = 0; i < num_flags; i++) { 505 length += strlen(vm_flags[i]); 506 } 507 for (i = 0; i < num_args; i++) { 508 length += strlen(vm_args[i]); 509 } 510 // add a space between each argument 511 length += num_flags + num_args - 1; 512 513 // Return the list of input arguments passed to the VM 514 // and preserve the order that the VM processes. 515 char* args = NEW_RESOURCE_ARRAY(char, length); 516 args[0] = '\0'; 517 // concatenate all jvm_flags 518 if (num_flags > 0) { 519 strcat(args, vm_flags[0]); 520 for (i = 1; i < num_flags; i++) { 521 strcat(args, " "); 522 strcat(args, vm_flags[i]); 523 } 524 } 525 526 if (num_args > 0 && num_flags > 0) { 527 // append a space if args already contains one or more jvm_flags 528 strcat(args, " "); 529 } 530 531 // concatenate all jvm_args 532 if (num_args > 0) { 533 strcat(args, vm_args[0]); 534 for (i = 1; i < num_args; i++) { 535 strcat(args, " "); 536 strcat(args, vm_args[i]); 537 } 538 } 539 540 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); 541 return JNIHandles::make_local(env, hargs()); 542JVM_END 543 544// Returns an array of java.lang.String object containing the input arguments to the VM. 545JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) 546 ResourceMark rm(THREAD); 547 548 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 549 return NULL; 550 } 551 552 char** vm_flags = Arguments::jvm_flags_array(); 553 char** vm_args = Arguments::jvm_args_array(); 554 int num_flags = Arguments::num_jvm_flags(); 555 int num_args = Arguments::num_jvm_args(); 556 557 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); 558 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); 559 objArrayHandle result_h(THREAD, r); 560 561 int index = 0; 562 for (int j = 0; j < num_flags; j++, index++) { 563 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 564 result_h->obj_at_put(index, h()); 565 } 566 for (int i = 0; i < num_args; i++, index++) { 567 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 568 result_h->obj_at_put(index, h()); 569 } 570 return (jobjectArray) JNIHandles::make_local(env, result_h()); 571JVM_END 572 573// Returns an array of java/lang/management/MemoryPoolMXBean object 574// one for each memory pool if obj == null; otherwise returns 575// an array of memory pools for a given memory manager if 576// it is a valid memory manager. 577JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) 578 ResourceMark rm(THREAD); 579 580 int num_memory_pools; 581 MemoryManager* mgr = NULL; 582 if (obj == NULL) { 583 num_memory_pools = MemoryService::num_memory_pools(); 584 } else { 585 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); 586 if (mgr == NULL) { 587 return NULL; 588 } 589 num_memory_pools = mgr->num_memory_pools(); 590 } 591 592 // Allocate the resulting MemoryPoolMXBean[] object 593 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); 594 instanceKlassHandle ik (THREAD, k); 595 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); 596 objArrayHandle poolArray(THREAD, r); 597 598 if (mgr == NULL) { 599 // Get all memory pools 600 for (int i = 0; i < num_memory_pools; i++) { 601 MemoryPool* pool = MemoryService::get_memory_pool(i); 602 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 603 instanceHandle ph(THREAD, p); 604 poolArray->obj_at_put(i, ph()); 605 } 606 } else { 607 // Get memory pools managed by a given memory manager 608 for (int i = 0; i < num_memory_pools; i++) { 609 MemoryPool* pool = mgr->get_memory_pool(i); 610 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 611 instanceHandle ph(THREAD, p); 612 poolArray->obj_at_put(i, ph()); 613 } 614 } 615 return (jobjectArray) JNIHandles::make_local(env, poolArray()); 616JVM_END 617 618// Returns an array of java/lang/management/MemoryManagerMXBean object 619// one for each memory manager if obj == null; otherwise returns 620// an array of memory managers for a given memory pool if 621// it is a valid memory pool. 622JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) 623 ResourceMark rm(THREAD); 624 625 int num_mgrs; 626 MemoryPool* pool = NULL; 627 if (obj == NULL) { 628 num_mgrs = MemoryService::num_memory_managers(); 629 } else { 630 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 631 if (pool == NULL) { 632 return NULL; 633 } 634 num_mgrs = pool->num_memory_managers(); 635 } 636 637 // Allocate the resulting MemoryManagerMXBean[] object 638 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); 639 instanceKlassHandle ik (THREAD, k); 640 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); 641 objArrayHandle mgrArray(THREAD, r); 642 643 if (pool == NULL) { 644 // Get all memory managers 645 for (int i = 0; i < num_mgrs; i++) { 646 MemoryManager* mgr = MemoryService::get_memory_manager(i); 647 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 648 instanceHandle ph(THREAD, p); 649 mgrArray->obj_at_put(i, ph()); 650 } 651 } else { 652 // Get memory managers for a given memory pool 653 for (int i = 0; i < num_mgrs; i++) { 654 MemoryManager* mgr = pool->get_memory_manager(i); 655 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 656 instanceHandle ph(THREAD, p); 657 mgrArray->obj_at_put(i, ph()); 658 } 659 } 660 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); 661JVM_END 662 663 664// Returns a java/lang/management/MemoryUsage object containing the memory usage 665// of a given memory pool. 666JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) 667 ResourceMark rm(THREAD); 668 669 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 670 if (pool != NULL) { 671 MemoryUsage usage = pool->get_memory_usage(); 672 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 673 return JNIHandles::make_local(env, h()); 674 } else { 675 return NULL; 676 } 677JVM_END 678 679// Returns a java/lang/management/MemoryUsage object containing the memory usage 680// of a given memory pool. 681JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) 682 ResourceMark rm(THREAD); 683 684 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 685 if (pool != NULL) { 686 MemoryUsage usage = pool->get_peak_memory_usage(); 687 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 688 return JNIHandles::make_local(env, h()); 689 } else { 690 return NULL; 691 } 692JVM_END 693 694// Returns a java/lang/management/MemoryUsage object containing the memory usage 695// of a given memory pool after most recent GC. 696JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) 697 ResourceMark rm(THREAD); 698 699 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 700 if (pool != NULL && pool->is_collected_pool()) { 701 MemoryUsage usage = pool->get_last_collection_usage(); 702 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 703 return JNIHandles::make_local(env, h()); 704 } else { 705 return NULL; 706 } 707JVM_END 708 709// Sets the memory pool sensor for a threshold type 710JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) 711 if (obj == NULL || sensorObj == NULL) { 712 THROW(vmSymbols::java_lang_NullPointerException()); 713 } 714 715 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK); 716 oop s = JNIHandles::resolve(sensorObj); 717 assert(s->is_instance(), "Sensor should be an instanceOop"); 718 instanceHandle sensor_h(THREAD, (instanceOop) s); 719 if (!sensor_h->is_a(sensor_klass)) { 720 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 721 "Sensor is not an instance of sun.management.Sensor class"); 722 } 723 724 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); 725 assert(mpool != NULL, "MemoryPool should exist"); 726 727 switch (type) { 728 case JMM_USAGE_THRESHOLD_HIGH: 729 case JMM_USAGE_THRESHOLD_LOW: 730 // have only one sensor for threshold high and low 731 mpool->set_usage_sensor_obj(sensor_h); 732 break; 733 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 734 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 735 // have only one sensor for threshold high and low 736 mpool->set_gc_usage_sensor_obj(sensor_h); 737 break; 738 default: 739 assert(false, "Unrecognized type"); 740 } 741 742JVM_END 743 744 745// Sets the threshold of a given memory pool. 746// Returns the previous threshold. 747// 748// Input parameters: 749// pool - the MemoryPoolMXBean object 750// type - threshold type 751// threshold - the new threshold (must not be negative) 752// 753JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) 754 if (threshold < 0) { 755 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 756 "Invalid threshold value", 757 -1); 758 } 759 760 if ((size_t)threshold > max_uintx) { 761 stringStream st; 762 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); 763 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); 764 } 765 766 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); 767 assert(pool != NULL, "MemoryPool should exist"); 768 769 jlong prev = 0; 770 switch (type) { 771 case JMM_USAGE_THRESHOLD_HIGH: 772 if (!pool->usage_threshold()->is_high_threshold_supported()) { 773 return -1; 774 } 775 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); 776 break; 777 778 case JMM_USAGE_THRESHOLD_LOW: 779 if (!pool->usage_threshold()->is_low_threshold_supported()) { 780 return -1; 781 } 782 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); 783 break; 784 785 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 786 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { 787 return -1; 788 } 789 // return and the new threshold is effective for the next GC 790 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); 791 792 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 793 if (!pool->gc_usage_threshold()->is_low_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_low_threshold((size_t) threshold); 798 799 default: 800 assert(false, "Unrecognized type"); 801 return -1; 802 } 803 804 // When the threshold is changed, reevaluate if the low memory 805 // detection is enabled. 806 if (prev != threshold) { 807 LowMemoryDetector::recompute_enabled_for_collected_pools(); 808 LowMemoryDetector::detect_low_memory(pool); 809 } 810 return prev; 811JVM_END 812 813// Returns a java/lang/management/MemoryUsage object representing 814// the memory usage for the heap or non-heap memory. 815JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) 816 ResourceMark rm(THREAD); 817 818 // Calculate the memory usage 819 size_t total_init = 0; 820 size_t total_used = 0; 821 size_t total_committed = 0; 822 size_t total_max = 0; 823 bool has_undefined_init_size = false; 824 bool has_undefined_max_size = false; 825 826 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 827 MemoryPool* pool = MemoryService::get_memory_pool(i); 828 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { 829 MemoryUsage u = pool->get_memory_usage(); 830 total_used += u.used(); 831 total_committed += u.committed(); 832 833 if (u.init_size() == (size_t)-1) { 834 has_undefined_init_size = true; 835 } 836 if (!has_undefined_init_size) { 837 total_init += u.init_size(); 838 } 839 840 if (u.max_size() == (size_t)-1) { 841 has_undefined_max_size = true; 842 } 843 if (!has_undefined_max_size) { 844 total_max += u.max_size(); 845 } 846 } 847 } 848 849 // if any one of the memory pool has undefined init_size or max_size, 850 // set it to -1 851 if (has_undefined_init_size) { 852 total_init = (size_t)-1; 853 } 854 if (has_undefined_max_size) { 855 total_max = (size_t)-1; 856 } 857 858 MemoryUsage usage((heap ? InitialHeapSize : total_init), 859 total_used, 860 total_committed, 861 (heap ? Universe::heap()->max_capacity() : total_max)); 862 863 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 864 return JNIHandles::make_local(env, obj()); 865JVM_END 866 867// Returns the boolean value of a given attribute. 868JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) 869 switch (att) { 870 case JMM_VERBOSE_GC: 871 return MemoryService::get_verbose(); 872 case JMM_VERBOSE_CLASS: 873 return ClassLoadingService::get_verbose(); 874 case JMM_THREAD_CONTENTION_MONITORING: 875 return ThreadService::is_thread_monitoring_contention(); 876 case JMM_THREAD_CPU_TIME: 877 return ThreadService::is_thread_cpu_time_enabled(); 878 case JMM_THREAD_ALLOCATED_MEMORY: 879 return ThreadService::is_thread_allocated_memory_enabled(); 880 default: 881 assert(0, "Unrecognized attribute"); 882 return false; 883 } 884JVM_END 885 886// Sets the given boolean attribute and returns the previous value. 887JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) 888 switch (att) { 889 case JMM_VERBOSE_GC: 890 return MemoryService::set_verbose(flag != 0); 891 case JMM_VERBOSE_CLASS: 892 return ClassLoadingService::set_verbose(flag != 0); 893 case JMM_THREAD_CONTENTION_MONITORING: 894 return ThreadService::set_thread_monitoring_contention(flag != 0); 895 case JMM_THREAD_CPU_TIME: 896 return ThreadService::set_thread_cpu_time_enabled(flag != 0); 897 case JMM_THREAD_ALLOCATED_MEMORY: 898 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); 899 default: 900 assert(0, "Unrecognized attribute"); 901 return false; 902 } 903JVM_END 904 905 906static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { 907 switch (att) { 908 case JMM_GC_TIME_MS: 909 return mgr->gc_time_ms(); 910 911 case JMM_GC_COUNT: 912 return mgr->gc_count(); 913 914 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: 915 // current implementation only has 1 ext attribute 916 return 1; 917 918 default: 919 assert(0, "Unrecognized GC attribute"); 920 return -1; 921 } 922} 923 924class VmThreadCountClosure: public ThreadClosure { 925 private: 926 int _count; 927 public: 928 VmThreadCountClosure() : _count(0) {}; 929 void do_thread(Thread* thread); 930 int count() { return _count; } 931}; 932 933void VmThreadCountClosure::do_thread(Thread* thread) { 934 // exclude externally visible JavaThreads 935 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 936 return; 937 } 938 939 _count++; 940} 941 942static jint get_vm_thread_count() { 943 VmThreadCountClosure vmtcc; 944 { 945 MutexLockerEx ml(Threads_lock); 946 Threads::threads_do(&vmtcc); 947 } 948 949 return vmtcc.count(); 950} 951 952static jint get_num_flags() { 953 // last flag entry is always NULL, so subtract 1 954 int nFlags = (int) Flag::numFlags - 1; 955 int count = 0; 956 for (int i = 0; i < nFlags; i++) { 957 Flag* flag = &Flag::flags[i]; 958 // Exclude the locked (diagnostic, experimental) flags 959 if (flag->is_unlocked() || flag->is_unlocker()) { 960 count++; 961 } 962 } 963 return count; 964} 965 966static jlong get_long_attribute(jmmLongAttribute att) { 967 switch (att) { 968 case JMM_CLASS_LOADED_COUNT: 969 return ClassLoadingService::loaded_class_count(); 970 971 case JMM_CLASS_UNLOADED_COUNT: 972 return ClassLoadingService::unloaded_class_count(); 973 974 case JMM_THREAD_TOTAL_COUNT: 975 return ThreadService::get_total_thread_count(); 976 977 case JMM_THREAD_LIVE_COUNT: 978 return ThreadService::get_live_thread_count(); 979 980 case JMM_THREAD_PEAK_COUNT: 981 return ThreadService::get_peak_thread_count(); 982 983 case JMM_THREAD_DAEMON_COUNT: 984 return ThreadService::get_daemon_thread_count(); 985 986 case JMM_JVM_INIT_DONE_TIME_MS: 987 return Management::vm_init_done_time(); 988 989 case JMM_JVM_UPTIME_MS: 990 return Management::ticks_to_ms(os::elapsed_counter()); 991 992 case JMM_COMPILE_TOTAL_TIME_MS: 993 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); 994 995 case JMM_OS_PROCESS_ID: 996 return os::current_process_id(); 997 998 // Hotspot-specific counters 999 case JMM_CLASS_LOADED_BYTES: 1000 return ClassLoadingService::loaded_class_bytes(); 1001 1002 case JMM_CLASS_UNLOADED_BYTES: 1003 return ClassLoadingService::unloaded_class_bytes(); 1004 1005 case JMM_SHARED_CLASS_LOADED_COUNT: 1006 return ClassLoadingService::loaded_shared_class_count(); 1007 1008 case JMM_SHARED_CLASS_UNLOADED_COUNT: 1009 return ClassLoadingService::unloaded_shared_class_count(); 1010 1011 1012 case JMM_SHARED_CLASS_LOADED_BYTES: 1013 return ClassLoadingService::loaded_shared_class_bytes(); 1014 1015 case JMM_SHARED_CLASS_UNLOADED_BYTES: 1016 return ClassLoadingService::unloaded_shared_class_bytes(); 1017 1018 case JMM_TOTAL_CLASSLOAD_TIME_MS: 1019 return ClassLoader::classloader_time_ms(); 1020 1021 case JMM_VM_GLOBAL_COUNT: 1022 return get_num_flags(); 1023 1024 case JMM_SAFEPOINT_COUNT: 1025 return RuntimeService::safepoint_count(); 1026 1027 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: 1028 return RuntimeService::safepoint_sync_time_ms(); 1029 1030 case JMM_TOTAL_STOPPED_TIME_MS: 1031 return RuntimeService::safepoint_time_ms(); 1032 1033 case JMM_TOTAL_APP_TIME_MS: 1034 return RuntimeService::application_time_ms(); 1035 1036 case JMM_VM_THREAD_COUNT: 1037 return get_vm_thread_count(); 1038 1039 case JMM_CLASS_INIT_TOTAL_COUNT: 1040 return ClassLoader::class_init_count(); 1041 1042 case JMM_CLASS_INIT_TOTAL_TIME_MS: 1043 return ClassLoader::class_init_time_ms(); 1044 1045 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: 1046 return ClassLoader::class_verify_time_ms(); 1047 1048 case JMM_METHOD_DATA_SIZE_BYTES: 1049 return ClassLoadingService::class_method_data_size(); 1050 1051 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: 1052 return os::physical_memory(); 1053 1054 default: 1055 return -1; 1056 } 1057} 1058 1059 1060// Returns the long value of a given attribute. 1061JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) 1062 if (obj == NULL) { 1063 return get_long_attribute(att); 1064 } else { 1065 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); 1066 if (mgr != NULL) { 1067 return get_gc_attribute(mgr, att); 1068 } 1069 } 1070 return -1; 1071JVM_END 1072 1073// Gets the value of all attributes specified in the given array 1074// and sets the value in the result array. 1075// Returns the number of attributes found. 1076JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, 1077 jobject obj, 1078 jmmLongAttribute* atts, 1079 jint count, 1080 jlong* result)) 1081 1082 int num_atts = 0; 1083 if (obj == NULL) { 1084 for (int i = 0; i < count; i++) { 1085 result[i] = get_long_attribute(atts[i]); 1086 if (result[i] != -1) { 1087 num_atts++; 1088 } 1089 } 1090 } else { 1091 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); 1092 for (int i = 0; i < count; i++) { 1093 result[i] = get_gc_attribute(mgr, atts[i]); 1094 if (result[i] != -1) { 1095 num_atts++; 1096 } 1097 } 1098 } 1099 return num_atts; 1100JVM_END 1101 1102// Helper function to do thread dump for a specific list of threads 1103static void do_thread_dump(ThreadDumpResult* dump_result, 1104 typeArrayHandle ids_ah, // array of thread ID (long[]) 1105 int num_threads, 1106 int max_depth, 1107 bool with_locked_monitors, 1108 bool with_locked_synchronizers, 1109 TRAPS) { 1110 1111 // First get an array of threadObj handles. 1112 // A JavaThread may terminate before we get the stack trace. 1113 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 1114 { 1115 MutexLockerEx ml(Threads_lock); 1116 for (int i = 0; i < num_threads; i++) { 1117 jlong tid = ids_ah->long_at(i); 1118 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid); 1119 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); 1120 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); 1121 thread_handle_array->append(threadObj_h); 1122 } 1123 } 1124 1125 // Obtain thread dumps and thread snapshot information 1126 VM_ThreadDump op(dump_result, 1127 thread_handle_array, 1128 num_threads, 1129 max_depth, /* stack depth */ 1130 with_locked_monitors, 1131 with_locked_synchronizers); 1132 VMThread::execute(&op); 1133} 1134 1135// Gets an array of ThreadInfo objects. Each element is the ThreadInfo 1136// for the thread ID specified in the corresponding entry in 1137// the given array of thread IDs; or NULL if the thread does not exist 1138// or has terminated. 1139// 1140// Input parameters: 1141// ids - array of thread IDs 1142// maxDepth - the maximum depth of stack traces to be dumped: 1143// maxDepth == -1 requests to dump entire stack trace. 1144// maxDepth == 0 requests no stack trace. 1145// infoArray - array of ThreadInfo objects 1146// 1147// QQQ - Why does this method return a value instead of void? 1148JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) 1149 // Check if threads is null 1150 if (ids == NULL || infoArray == NULL) { 1151 THROW_(vmSymbols::java_lang_NullPointerException(), -1); 1152 } 1153 1154 if (maxDepth < -1) { 1155 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1156 "Invalid maxDepth", -1); 1157 } 1158 1159 ResourceMark rm(THREAD); 1160 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1161 typeArrayHandle ids_ah(THREAD, ta); 1162 1163 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); 1164 objArrayOop oa = objArrayOop(infoArray_obj); 1165 objArrayHandle infoArray_h(THREAD, oa); 1166 1167 // validate the thread id array 1168 validate_thread_id_array(ids_ah, CHECK_0); 1169 1170 // validate the ThreadInfo[] parameters 1171 validate_thread_info_array(infoArray_h, CHECK_0); 1172 1173 // infoArray must be of the same length as the given array of thread IDs 1174 int num_threads = ids_ah->length(); 1175 if (num_threads != infoArray_h->length()) { 1176 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1177 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); 1178 } 1179 1180 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1181 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); 1182 1183 // Must use ThreadDumpResult to store the ThreadSnapshot. 1184 // GC may occur after the thread snapshots are taken but before 1185 // this function returns. The threadObj and other oops kept 1186 // in the ThreadSnapshot are marked and adjusted during GC. 1187 ThreadDumpResult dump_result(num_threads); 1188 1189 if (maxDepth == 0) { 1190 // no stack trace dumped - do not need to stop the world 1191 { 1192 MutexLockerEx ml(Threads_lock); 1193 for (int i = 0; i < num_threads; i++) { 1194 jlong tid = ids_ah->long_at(i); 1195 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid); 1196 ThreadSnapshot* ts; 1197 if (jt == NULL) { 1198 // if the thread does not exist or now it is terminated, 1199 // create dummy snapshot 1200 ts = new ThreadSnapshot(); 1201 } else { 1202 ts = new ThreadSnapshot(jt); 1203 } 1204 dump_result.add_thread_snapshot(ts); 1205 } 1206 } 1207 } else { 1208 // obtain thread dump with the specific list of threads with stack trace 1209 do_thread_dump(&dump_result, 1210 ids_ah, 1211 num_threads, 1212 maxDepth, 1213 false, /* no locked monitor */ 1214 false, /* no locked synchronizers */ 1215 CHECK_0); 1216 } 1217 1218 int num_snapshots = dump_result.num_snapshots(); 1219 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); 1220 int index = 0; 1221 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { 1222 // For each thread, create an java/lang/management/ThreadInfo object 1223 // and fill with the thread information 1224 1225 if (ts->threadObj() == NULL) { 1226 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1227 infoArray_h->obj_at_put(index, NULL); 1228 continue; 1229 } 1230 1231 // Create java.lang.management.ThreadInfo object 1232 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); 1233 infoArray_h->obj_at_put(index, info_obj); 1234 } 1235 return 0; 1236JVM_END 1237 1238// Dump thread info for the specified threads. 1239// It returns an array of ThreadInfo objects. Each element is the ThreadInfo 1240// for the thread ID specified in the corresponding entry in 1241// the given array of thread IDs; or NULL if the thread does not exist 1242// or has terminated. 1243// 1244// Input parameter: 1245// ids - array of thread IDs; NULL indicates all live threads 1246// locked_monitors - if true, dump locked object monitors 1247// locked_synchronizers - if true, dump locked JSR-166 synchronizers 1248// 1249JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) 1250 ResourceMark rm(THREAD); 1251 1252 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1253 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); 1254 1255 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); 1256 int num_threads = (ta != NULL ? ta->length() : 0); 1257 typeArrayHandle ids_ah(THREAD, ta); 1258 1259 ThreadDumpResult dump_result(num_threads); // can safepoint 1260 1261 if (ids_ah() != NULL) { 1262 1263 // validate the thread id array 1264 validate_thread_id_array(ids_ah, CHECK_NULL); 1265 1266 // obtain thread dump of a specific list of threads 1267 do_thread_dump(&dump_result, 1268 ids_ah, 1269 num_threads, 1270 -1, /* entire stack */ 1271 (locked_monitors ? true : false), /* with locked monitors */ 1272 (locked_synchronizers ? true : false), /* with locked synchronizers */ 1273 CHECK_NULL); 1274 } else { 1275 // obtain thread dump of all threads 1276 VM_ThreadDump op(&dump_result, 1277 -1, /* entire stack */ 1278 (locked_monitors ? true : false), /* with locked monitors */ 1279 (locked_synchronizers ? true : false) /* with locked synchronizers */); 1280 VMThread::execute(&op); 1281 } 1282 1283 int num_snapshots = dump_result.num_snapshots(); 1284 1285 // create the result ThreadInfo[] object 1286 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 1287 instanceKlassHandle ik (THREAD, k); 1288 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); 1289 objArrayHandle result_h(THREAD, r); 1290 1291 int index = 0; 1292 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { 1293 if (ts->threadObj() == NULL) { 1294 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1295 result_h->obj_at_put(index, NULL); 1296 continue; 1297 } 1298 1299 ThreadStackTrace* stacktrace = ts->get_stack_trace(); 1300 assert(stacktrace != NULL, "Must have a stack trace dumped"); 1301 1302 // Create Object[] filled with locked monitors 1303 // Create int[] filled with the stack depth where a monitor was locked 1304 int num_frames = stacktrace->get_stack_depth(); 1305 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); 1306 1307 // Count the total number of locked monitors 1308 for (int i = 0; i < num_frames; i++) { 1309 StackFrameInfo* frame = stacktrace->stack_frame_at(i); 1310 num_locked_monitors += frame->num_locked_monitors(); 1311 } 1312 1313 objArrayHandle monitors_array; 1314 typeArrayHandle depths_array; 1315 objArrayHandle synchronizers_array; 1316 1317 if (locked_monitors) { 1318 // Constructs Object[] and int[] to contain the object monitor and the stack depth 1319 // where the thread locked it 1320 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); 1321 objArrayHandle mh(THREAD, array); 1322 monitors_array = mh; 1323 1324 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); 1325 typeArrayHandle dh(THREAD, tarray); 1326 depths_array = dh; 1327 1328 int count = 0; 1329 int j = 0; 1330 for (int depth = 0; depth < num_frames; depth++) { 1331 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); 1332 int len = frame->num_locked_monitors(); 1333 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); 1334 for (j = 0; j < len; j++) { 1335 oop monitor = locked_monitors->at(j); 1336 assert(monitor != NULL, "must be a Java object"); 1337 monitors_array->obj_at_put(count, monitor); 1338 depths_array->int_at_put(count, depth); 1339 count++; 1340 } 1341 } 1342 1343 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); 1344 for (j = 0; j < jni_locked_monitors->length(); j++) { 1345 oop object = jni_locked_monitors->at(j); 1346 assert(object != NULL, "must be a Java object"); 1347 monitors_array->obj_at_put(count, object); 1348 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info 1349 depths_array->int_at_put(count, -1); 1350 count++; 1351 } 1352 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); 1353 } 1354 1355 if (locked_synchronizers) { 1356 // Create Object[] filled with locked JSR-166 synchronizers 1357 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); 1358 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); 1359 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); 1360 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); 1361 1362 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); 1363 objArrayHandle sh(THREAD, array); 1364 synchronizers_array = sh; 1365 1366 for (int k = 0; k < num_locked_synchronizers; k++) { 1367 synchronizers_array->obj_at_put(k, locks->at(k)); 1368 } 1369 } 1370 1371 // Create java.lang.management.ThreadInfo object 1372 instanceOop info_obj = Management::create_thread_info_instance(ts, 1373 monitors_array, 1374 depths_array, 1375 synchronizers_array, 1376 CHECK_NULL); 1377 result_h->obj_at_put(index, info_obj); 1378 } 1379 1380 return (jobjectArray) JNIHandles::make_local(env, result_h()); 1381JVM_END 1382 1383// Returns an array of Class objects. 1384JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) 1385 ResourceMark rm(THREAD); 1386 1387 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter 1388 1389 int num_classes = lce.num_loaded_classes(); 1390 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); 1391 objArrayHandle classes_ah(THREAD, r); 1392 1393 for (int i = 0; i < num_classes; i++) { 1394 KlassHandle kh = lce.get_klass(i); 1395 oop mirror = kh()->java_mirror(); 1396 classes_ah->obj_at_put(i, mirror); 1397 } 1398 1399 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); 1400JVM_END 1401 1402// Reset statistic. Return true if the requested statistic is reset. 1403// Otherwise, return false. 1404// 1405// Input parameters: 1406// obj - specify which instance the statistic associated with to be reset 1407// For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. 1408// For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. 1409// type - the type of statistic to be reset 1410// 1411JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) 1412 ResourceMark rm(THREAD); 1413 1414 switch (type) { 1415 case JMM_STAT_PEAK_THREAD_COUNT: 1416 ThreadService::reset_peak_thread_count(); 1417 return true; 1418 1419 case JMM_STAT_THREAD_CONTENTION_COUNT: 1420 case JMM_STAT_THREAD_CONTENTION_TIME: { 1421 jlong tid = obj.j; 1422 if (tid < 0) { 1423 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); 1424 } 1425 1426 // Look for the JavaThread of this given tid 1427 MutexLockerEx ml(Threads_lock); 1428 if (tid == 0) { 1429 // reset contention statistics for all threads if tid == 0 1430 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { 1431 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1432 ThreadService::reset_contention_count_stat(java_thread); 1433 } else { 1434 ThreadService::reset_contention_time_stat(java_thread); 1435 } 1436 } 1437 } else { 1438 // reset contention statistics for a given thread 1439 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(tid); 1440 if (java_thread == NULL) { 1441 return false; 1442 } 1443 1444 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1445 ThreadService::reset_contention_count_stat(java_thread); 1446 } else { 1447 ThreadService::reset_contention_time_stat(java_thread); 1448 } 1449 } 1450 return true; 1451 break; 1452 } 1453 case JMM_STAT_PEAK_POOL_USAGE: { 1454 jobject o = obj.l; 1455 if (o == NULL) { 1456 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1457 } 1458 1459 oop pool_obj = JNIHandles::resolve(o); 1460 assert(pool_obj->is_instance(), "Should be an instanceOop"); 1461 instanceHandle ph(THREAD, (instanceOop) pool_obj); 1462 1463 MemoryPool* pool = MemoryService::get_memory_pool(ph); 1464 if (pool != NULL) { 1465 pool->reset_peak_memory_usage(); 1466 return true; 1467 } 1468 break; 1469 } 1470 case JMM_STAT_GC_STAT: { 1471 jobject o = obj.l; 1472 if (o == NULL) { 1473 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1474 } 1475 1476 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); 1477 if (mgr != NULL) { 1478 mgr->reset_gc_stat(); 1479 return true; 1480 } 1481 break; 1482 } 1483 default: 1484 assert(0, "Unknown Statistic Type"); 1485 } 1486 return false; 1487JVM_END 1488 1489// Returns the fast estimate of CPU time consumed by 1490// a given thread (in nanoseconds). 1491// If thread_id == 0, return CPU time for the current thread. 1492JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) 1493 if (!os::is_thread_cpu_time_supported()) { 1494 return -1; 1495 } 1496 1497 if (thread_id < 0) { 1498 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1499 "Invalid thread ID", -1); 1500 } 1501 1502 JavaThread* java_thread = NULL; 1503 if (thread_id == 0) { 1504 // current thread 1505 return os::current_thread_cpu_time(); 1506 } else { 1507 MutexLockerEx ml(Threads_lock); 1508 java_thread = Threads::find_java_thread_from_java_tid(thread_id); 1509 if (java_thread != NULL) { 1510 return os::thread_cpu_time((Thread*) java_thread); 1511 } 1512 } 1513 return -1; 1514JVM_END 1515 1516// Returns a String array of all VM global flag names 1517JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) 1518 // last flag entry is always NULL, so subtract 1 1519 int nFlags = (int) Flag::numFlags - 1; 1520 // allocate a temp array 1521 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1522 nFlags, CHECK_0); 1523 objArrayHandle flags_ah(THREAD, r); 1524 int num_entries = 0; 1525 for (int i = 0; i < nFlags; i++) { 1526 Flag* flag = &Flag::flags[i]; 1527 // Exclude notproduct and develop flags in product builds. 1528 if (flag->is_constant_in_binary()) { 1529 continue; 1530 } 1531 // Exclude the locked (experimental, diagnostic) flags 1532 if (flag->is_unlocked() || flag->is_unlocker()) { 1533 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0); 1534 flags_ah->obj_at_put(num_entries, s()); 1535 num_entries++; 1536 } 1537 } 1538 1539 if (num_entries < nFlags) { 1540 // Return array of right length 1541 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); 1542 for(int i = 0; i < num_entries; i++) { 1543 res->obj_at_put(i, flags_ah->obj_at(i)); 1544 } 1545 return (jobjectArray)JNIHandles::make_local(env, res); 1546 } 1547 1548 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); 1549JVM_END 1550 1551// Utility function used by jmm_GetVMGlobals. Returns false if flag type 1552// can't be determined, true otherwise. If false is returned, then *global 1553// will be incomplete and invalid. 1554bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { 1555 Handle flag_name; 1556 if (name() == NULL) { 1557 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false); 1558 } else { 1559 flag_name = name; 1560 } 1561 global->name = (jstring)JNIHandles::make_local(env, flag_name()); 1562 1563 if (flag->is_bool()) { 1564 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; 1565 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; 1566 } else if (flag->is_intx()) { 1567 global->value.j = (jlong)flag->get_intx(); 1568 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1569 } else if (flag->is_uintx()) { 1570 global->value.j = (jlong)flag->get_uintx(); 1571 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1572 } else if (flag->is_uint64_t()) { 1573 global->value.j = (jlong)flag->get_uint64_t(); 1574 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1575 } else if (flag->is_double()) { 1576 global->value.d = (jdouble)flag->get_double(); 1577 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE; 1578 } else if (flag->is_size_t()) { 1579 global->value.j = (jlong)flag->get_size_t(); 1580 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1581 } else if (flag->is_ccstr()) { 1582 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); 1583 global->value.l = (jobject)JNIHandles::make_local(env, str()); 1584 global->type = JMM_VMGLOBAL_TYPE_JSTRING; 1585 } else { 1586 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; 1587 return false; 1588 } 1589 1590 global->writeable = flag->is_writeable(); 1591 global->external = flag->is_external(); 1592 switch (flag->get_origin()) { 1593 case Flag::DEFAULT: 1594 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; 1595 break; 1596 case Flag::COMMAND_LINE: 1597 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; 1598 break; 1599 case Flag::ENVIRON_VAR: 1600 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; 1601 break; 1602 case Flag::CONFIG_FILE: 1603 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; 1604 break; 1605 case Flag::MANAGEMENT: 1606 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; 1607 break; 1608 case Flag::ERGONOMIC: 1609 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; 1610 break; 1611 case Flag::ATTACH_ON_DEMAND: 1612 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND; 1613 break; 1614 default: 1615 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; 1616 } 1617 1618 return true; 1619} 1620 1621// Fill globals array of count length with jmmVMGlobal entries 1622// specified by names. If names == NULL, fill globals array 1623// with all Flags. Return value is number of entries 1624// created in globals. 1625// If a Flag with a given name in an array element does not 1626// exist, globals[i].name will be set to NULL. 1627JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, 1628 jobjectArray names, 1629 jmmVMGlobal *globals, 1630 jint count)) 1631 1632 1633 if (globals == NULL) { 1634 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1635 } 1636 1637 ResourceMark rm(THREAD); 1638 1639 if (names != NULL) { 1640 // return the requested globals 1641 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); 1642 objArrayHandle names_ah(THREAD, ta); 1643 // Make sure we have a String array 1644 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1645 if (element_klass != SystemDictionary::String_klass()) { 1646 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1647 "Array element type is not String class", 0); 1648 } 1649 1650 int names_length = names_ah->length(); 1651 int num_entries = 0; 1652 for (int i = 0; i < names_length && i < count; i++) { 1653 oop s = names_ah->obj_at(i); 1654 if (s == NULL) { 1655 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1656 } 1657 1658 Handle sh(THREAD, s); 1659 char* str = java_lang_String::as_utf8_string(s); 1660 Flag* flag = Flag::find_flag(str, strlen(str)); 1661 if (flag != NULL && 1662 add_global_entry(env, sh, &globals[i], flag, THREAD)) { 1663 num_entries++; 1664 } else { 1665 globals[i].name = NULL; 1666 } 1667 } 1668 return num_entries; 1669 } else { 1670 // return all globals if names == NULL 1671 1672 // last flag entry is always NULL, so subtract 1 1673 int nFlags = (int) Flag::numFlags - 1; 1674 Handle null_h; 1675 int num_entries = 0; 1676 for (int i = 0; i < nFlags && num_entries < count; i++) { 1677 Flag* flag = &Flag::flags[i]; 1678 // Exclude notproduct and develop flags in product builds. 1679 if (flag->is_constant_in_binary()) { 1680 continue; 1681 } 1682 // Exclude the locked (diagnostic, experimental) flags 1683 if ((flag->is_unlocked() || flag->is_unlocker()) && 1684 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { 1685 num_entries++; 1686 } 1687 } 1688 return num_entries; 1689 } 1690JVM_END 1691 1692JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) 1693 ResourceMark rm(THREAD); 1694 1695 oop fn = JNIHandles::resolve_external_guard(flag_name); 1696 if (fn == NULL) { 1697 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 1698 "The flag name cannot be null."); 1699 } 1700 char* name = java_lang_String::as_utf8_string(fn); 1701 Flag* flag = Flag::find_flag(name, strlen(name)); 1702 if (flag == NULL) { 1703 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1704 "Flag does not exist."); 1705 } 1706 if (!flag->is_writeable()) { 1707 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1708 "This flag is not writeable."); 1709 } 1710 1711 bool succeed = false; 1712 if (flag->is_bool()) { 1713 bool bvalue = (new_value.z == JNI_TRUE ? true : false); 1714 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT); 1715 } else if (flag->is_intx()) { 1716 intx ivalue = (intx)new_value.j; 1717 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT); 1718 } else if (flag->is_uintx()) { 1719 uintx uvalue = (uintx)new_value.j; 1720 1721 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) { 1722 FormatBuffer<80> err_msg("%s", ""); 1723 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) { 1724 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer()); 1725 } 1726 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) { 1727 FormatBuffer<80> err_msg("%s", ""); 1728 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) { 1729 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer()); 1730 } 1731 } 1732 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT); 1733 } else if (flag->is_uint64_t()) { 1734 uint64_t uvalue = (uint64_t)new_value.j; 1735 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT); 1736 } else if (flag->is_size_t()) { 1737 size_t svalue = (size_t)new_value.j; 1738 succeed = CommandLineFlags::size_tAtPut(name, &svalue, Flag::MANAGEMENT); 1739 } else if (flag->is_ccstr()) { 1740 oop str = JNIHandles::resolve_external_guard(new_value.l); 1741 if (str == NULL) { 1742 THROW(vmSymbols::java_lang_NullPointerException()); 1743 } 1744 ccstr svalue = java_lang_String::as_utf8_string(str); 1745 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT); 1746 if (succeed) { 1747 FREE_C_HEAP_ARRAY(char, svalue, mtInternal); 1748 } 1749 } 1750 assert(succeed, "Setting flag should succeed"); 1751JVM_END 1752 1753class ThreadTimesClosure: public ThreadClosure { 1754 private: 1755 objArrayHandle _names_strings; 1756 char **_names_chars; 1757 typeArrayHandle _times; 1758 int _names_len; 1759 int _times_len; 1760 int _count; 1761 1762 public: 1763 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times); 1764 ~ThreadTimesClosure(); 1765 virtual void do_thread(Thread* thread); 1766 void do_unlocked(); 1767 int count() { return _count; } 1768}; 1769 1770ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, 1771 typeArrayHandle times) { 1772 assert(names() != NULL, "names was NULL"); 1773 assert(times() != NULL, "times was NULL"); 1774 _names_strings = names; 1775 _names_len = names->length(); 1776 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); 1777 _times = times; 1778 _times_len = times->length(); 1779 _count = 0; 1780} 1781 1782// 1783// Called with Threads_lock held 1784// 1785void ThreadTimesClosure::do_thread(Thread* thread) { 1786 assert(thread != NULL, "thread was NULL"); 1787 1788 // exclude externally visible JavaThreads 1789 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 1790 return; 1791 } 1792 1793 if (_count >= _names_len || _count >= _times_len) { 1794 // skip if the result array is not big enough 1795 return; 1796 } 1797 1798 EXCEPTION_MARK; 1799 ResourceMark rm(THREAD); // thread->name() uses ResourceArea 1800 1801 assert(thread->name() != NULL, "All threads should have a name"); 1802 _names_chars[_count] = os::strdup(thread->name()); 1803 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? 1804 os::thread_cpu_time(thread) : -1); 1805 _count++; 1806} 1807 1808// Called without Threads_lock, we can allocate String objects. 1809void ThreadTimesClosure::do_unlocked() { 1810 1811 EXCEPTION_MARK; 1812 for (int i = 0; i < _count; i++) { 1813 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); 1814 _names_strings->obj_at_put(i, s()); 1815 } 1816} 1817 1818ThreadTimesClosure::~ThreadTimesClosure() { 1819 for (int i = 0; i < _count; i++) { 1820 os::free(_names_chars[i]); 1821 } 1822 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal); 1823} 1824 1825// Fills names with VM internal thread names and times with the corresponding 1826// CPU times. If names or times is NULL, a NullPointerException is thrown. 1827// If the element type of names is not String, an IllegalArgumentException is 1828// thrown. 1829// If an array is not large enough to hold all the entries, only the entries 1830// that fit will be returned. Return value is the number of VM internal 1831// threads entries. 1832JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, 1833 jobjectArray names, 1834 jlongArray times)) 1835 if (names == NULL || times == NULL) { 1836 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1837 } 1838 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); 1839 objArrayHandle names_ah(THREAD, na); 1840 1841 // Make sure we have a String array 1842 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1843 if (element_klass != SystemDictionary::String_klass()) { 1844 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1845 "Array element type is not String class", 0); 1846 } 1847 1848 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); 1849 typeArrayHandle times_ah(THREAD, ta); 1850 1851 ThreadTimesClosure ttc(names_ah, times_ah); 1852 { 1853 MutexLockerEx ml(Threads_lock); 1854 Threads::threads_do(&ttc); 1855 } 1856 ttc.do_unlocked(); 1857 return ttc.count(); 1858JVM_END 1859 1860static Handle find_deadlocks(bool object_monitors_only, TRAPS) { 1861 ResourceMark rm(THREAD); 1862 1863 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); 1864 VMThread::execute(&op); 1865 1866 DeadlockCycle* deadlocks = op.result(); 1867 if (deadlocks == NULL) { 1868 // no deadlock found and return 1869 return Handle(); 1870 } 1871 1872 int num_threads = 0; 1873 DeadlockCycle* cycle; 1874 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1875 num_threads += cycle->num_threads(); 1876 } 1877 1878 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); 1879 objArrayHandle threads_ah(THREAD, r); 1880 1881 int index = 0; 1882 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1883 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); 1884 int len = deadlock_threads->length(); 1885 for (int i = 0; i < len; i++) { 1886 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); 1887 index++; 1888 } 1889 } 1890 return threads_ah; 1891} 1892 1893// Finds cycles of threads that are deadlocked involved in object monitors 1894// and JSR-166 synchronizers. 1895// Returns an array of Thread objects which are in deadlock, if any. 1896// Otherwise, returns NULL. 1897// 1898// Input parameter: 1899// object_monitors_only - if true, only check object monitors 1900// 1901JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) 1902 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); 1903 return (jobjectArray) JNIHandles::make_local(env, result()); 1904JVM_END 1905 1906// Finds cycles of threads that are deadlocked on monitor locks 1907// Returns an array of Thread objects which are in deadlock, if any. 1908// Otherwise, returns NULL. 1909JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) 1910 Handle result = find_deadlocks(true, CHECK_0); 1911 return (jobjectArray) JNIHandles::make_local(env, result()); 1912JVM_END 1913 1914// Gets the information about GC extension attributes including 1915// the name of the attribute, its type, and a short description. 1916// 1917// Input parameters: 1918// mgr - GC memory manager 1919// info - caller allocated array of jmmExtAttributeInfo 1920// count - number of elements of the info array 1921// 1922// Returns the number of GC extension attributes filled in the info array; or 1923// -1 if info is not big enough 1924// 1925JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) 1926 // All GC memory managers have 1 attribute (number of GC threads) 1927 if (count == 0) { 1928 return 0; 1929 } 1930 1931 if (info == NULL) { 1932 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1933 } 1934 1935 info[0].name = "GcThreadCount"; 1936 info[0].type = 'I'; 1937 info[0].description = "Number of GC threads"; 1938 return 1; 1939JVM_END 1940 1941// verify the given array is an array of java/lang/management/MemoryUsage objects 1942// of a given length and return the objArrayOop 1943static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { 1944 if (array == NULL) { 1945 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1946 } 1947 1948 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); 1949 objArrayHandle array_h(THREAD, oa); 1950 1951 // array must be of the given length 1952 if (length != array_h->length()) { 1953 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1954 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); 1955 } 1956 1957 // check if the element of array is of type MemoryUsage class 1958 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); 1959 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass(); 1960 if (element_klass != usage_klass) { 1961 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1962 "The element type is not MemoryUsage class", 0); 1963 } 1964 1965 return array_h(); 1966} 1967 1968// Gets the statistics of the last GC of a given GC memory manager. 1969// Input parameters: 1970// obj - GarbageCollectorMXBean object 1971// gc_stat - caller allocated jmmGCStat where: 1972// a. before_gc_usage - array of MemoryUsage objects 1973// b. after_gc_usage - array of MemoryUsage objects 1974// c. gc_ext_attributes_values_size is set to the 1975// gc_ext_attribute_values array allocated 1976// d. gc_ext_attribute_values is a caller allocated array of jvalue. 1977// 1978// On return, 1979// gc_index == 0 indicates no GC statistics available 1980// 1981// before_gc_usage and after_gc_usage - filled with per memory pool 1982// before and after GC usage in the same order as the memory pools 1983// returned by GetMemoryPools for a given GC memory manager. 1984// num_gc_ext_attributes indicates the number of elements in 1985// the gc_ext_attribute_values array is filled; or 1986// -1 if the gc_ext_attributes_values array is not big enough 1987// 1988JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) 1989 ResourceMark rm(THREAD); 1990 1991 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { 1992 THROW(vmSymbols::java_lang_NullPointerException()); 1993 } 1994 1995 // Get the GCMemoryManager 1996 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 1997 1998 // Make a copy of the last GC statistics 1999 // GC may occur while constructing the last GC information 2000 int num_pools = MemoryService::num_memory_pools(); 2001 GCStatInfo stat(num_pools); 2002 if (mgr->get_last_gc_stat(&stat) == 0) { 2003 gc_stat->gc_index = 0; 2004 return; 2005 } 2006 2007 gc_stat->gc_index = stat.gc_index(); 2008 gc_stat->start_time = Management::ticks_to_ms(stat.start_time()); 2009 gc_stat->end_time = Management::ticks_to_ms(stat.end_time()); 2010 2011 // Current implementation does not have GC extension attributes 2012 gc_stat->num_gc_ext_attributes = 0; 2013 2014 // Fill the arrays of MemoryUsage objects with before and after GC 2015 // per pool memory usage 2016 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, 2017 num_pools, 2018 CHECK); 2019 objArrayHandle usage_before_gc_ah(THREAD, bu); 2020 2021 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, 2022 num_pools, 2023 CHECK); 2024 objArrayHandle usage_after_gc_ah(THREAD, au); 2025 2026 for (int i = 0; i < num_pools; i++) { 2027 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK); 2028 Handle after_usage; 2029 2030 MemoryUsage u = stat.after_gc_usage_for_pool(i); 2031 if (u.max_size() == 0 && u.used() > 0) { 2032 // If max size == 0, this pool is a survivor space. 2033 // Set max size = -1 since the pools will be swapped after GC. 2034 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); 2035 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); 2036 } else { 2037 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK); 2038 } 2039 usage_before_gc_ah->obj_at_put(i, before_usage()); 2040 usage_after_gc_ah->obj_at_put(i, after_usage()); 2041 } 2042 2043 if (gc_stat->gc_ext_attribute_values_size > 0) { 2044 // Current implementation only has 1 attribute (number of GC threads) 2045 // The type is 'I' 2046 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); 2047 } 2048JVM_END 2049 2050JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) 2051 ResourceMark rm(THREAD); 2052 // Get the GCMemoryManager 2053 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2054 mgr->set_notification_enabled(enabled?true:false); 2055JVM_END 2056 2057// Dump heap - Returns 0 if succeeds. 2058JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) 2059#if INCLUDE_SERVICES 2060 ResourceMark rm(THREAD); 2061 oop on = JNIHandles::resolve_external_guard(outputfile); 2062 if (on == NULL) { 2063 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2064 "Output file name cannot be null.", -1); 2065 } 2066 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1)); 2067 if (name == NULL) { 2068 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2069 "Output file name cannot be null.", -1); 2070 } 2071 HeapDumper dumper(live ? true : false); 2072 if (dumper.dump(name) != 0) { 2073 const char* errmsg = dumper.error_as_C_string(); 2074 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); 2075 } 2076 return 0; 2077#else // INCLUDE_SERVICES 2078 return -1; 2079#endif // INCLUDE_SERVICES 2080JVM_END 2081 2082JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) 2083 ResourceMark rm(THREAD); 2084 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean); 2085 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), 2086 dcmd_list->length(), CHECK_NULL); 2087 objArrayHandle cmd_array(THREAD, cmd_array_oop); 2088 for (int i = 0; i < dcmd_list->length(); i++) { 2089 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); 2090 cmd_array->obj_at_put(i, cmd_name); 2091 } 2092 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); 2093JVM_END 2094 2095JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, 2096 dcmdInfo* infoArray)) 2097 if (cmds == NULL || infoArray == NULL) { 2098 THROW(vmSymbols::java_lang_NullPointerException()); 2099 } 2100 2101 ResourceMark rm(THREAD); 2102 2103 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); 2104 objArrayHandle cmds_ah(THREAD, ca); 2105 2106 // Make sure we have a String array 2107 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass(); 2108 if (element_klass != SystemDictionary::String_klass()) { 2109 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2110 "Array element type is not String class"); 2111 } 2112 2113 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean); 2114 2115 int num_cmds = cmds_ah->length(); 2116 for (int i = 0; i < num_cmds; i++) { 2117 oop cmd = cmds_ah->obj_at(i); 2118 if (cmd == NULL) { 2119 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2120 "Command name cannot be null."); 2121 } 2122 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2123 if (cmd_name == NULL) { 2124 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2125 "Command name cannot be null."); 2126 } 2127 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); 2128 if (pos == -1) { 2129 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2130 "Unknown diagnostic command"); 2131 } 2132 DCmdInfo* info = info_list->at(pos); 2133 infoArray[i].name = info->name(); 2134 infoArray[i].description = info->description(); 2135 infoArray[i].impact = info->impact(); 2136 JavaPermission p = info->permission(); 2137 infoArray[i].permission_class = p._class; 2138 infoArray[i].permission_name = p._name; 2139 infoArray[i].permission_action = p._action; 2140 infoArray[i].num_arguments = info->num_arguments(); 2141 infoArray[i].enabled = info->is_enabled(); 2142 } 2143JVM_END 2144 2145JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, 2146 jstring command, dcmdArgInfo* infoArray)) 2147 ResourceMark rm(THREAD); 2148 oop cmd = JNIHandles::resolve_external_guard(command); 2149 if (cmd == NULL) { 2150 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2151 "Command line cannot be null."); 2152 } 2153 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2154 if (cmd_name == NULL) { 2155 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2156 "Command line content cannot be null."); 2157 } 2158 DCmd* dcmd = NULL; 2159 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name, 2160 strlen(cmd_name)); 2161 if (factory != NULL) { 2162 dcmd = factory->create_resource_instance(NULL); 2163 } 2164 if (dcmd == NULL) { 2165 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2166 "Unknown diagnostic command"); 2167 } 2168 DCmdMark mark(dcmd); 2169 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); 2170 if (array->length() == 0) { 2171 return; 2172 } 2173 for (int i = 0; i < array->length(); i++) { 2174 infoArray[i].name = array->at(i)->name(); 2175 infoArray[i].description = array->at(i)->description(); 2176 infoArray[i].type = array->at(i)->type(); 2177 infoArray[i].default_string = array->at(i)->default_string(); 2178 infoArray[i].mandatory = array->at(i)->is_mandatory(); 2179 infoArray[i].option = array->at(i)->is_option(); 2180 infoArray[i].multiple = array->at(i)->is_multiple(); 2181 infoArray[i].position = array->at(i)->position(); 2182 } 2183 return; 2184JVM_END 2185 2186JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) 2187 ResourceMark rm(THREAD); 2188 oop cmd = JNIHandles::resolve_external_guard(commandline); 2189 if (cmd == NULL) { 2190 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2191 "Command line cannot be null."); 2192 } 2193 char* cmdline = java_lang_String::as_utf8_string(cmd); 2194 if (cmdline == NULL) { 2195 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2196 "Command line content cannot be null."); 2197 } 2198 bufferedStream output; 2199 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL); 2200 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); 2201 return (jstring) JNIHandles::make_local(env, result); 2202JVM_END 2203 2204JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled)) 2205 DCmdFactory::set_jmx_notification_enabled(enabled?true:false); 2206JVM_END 2207 2208jlong Management::ticks_to_ms(jlong ticks) { 2209 assert(os::elapsed_frequency() > 0, "Must be non-zero"); 2210 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) 2211 * (double)1000.0); 2212} 2213#endif // INCLUDE_MANAGEMENT 2214 2215// Gets an array containing the amount of memory allocated on the Java 2216// heap for a set of threads (in bytes). Each element of the array is 2217// the amount of memory allocated for the thread ID specified in the 2218// corresponding entry in the given array of thread IDs; or -1 if the 2219// thread does not exist or has terminated. 2220JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, 2221 jlongArray sizeArray)) 2222 // Check if threads is null 2223 if (ids == NULL || sizeArray == NULL) { 2224 THROW(vmSymbols::java_lang_NullPointerException()); 2225 } 2226 2227 ResourceMark rm(THREAD); 2228 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 2229 typeArrayHandle ids_ah(THREAD, ta); 2230 2231 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); 2232 typeArrayHandle sizeArray_h(THREAD, sa); 2233 2234 // validate the thread id array 2235 validate_thread_id_array(ids_ah, CHECK); 2236 2237 // sizeArray must be of the same length as the given array of thread IDs 2238 int num_threads = ids_ah->length(); 2239 if (num_threads != sizeArray_h->length()) { 2240 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2241 "The length of the given long array does not match the length of " 2242 "the given array of thread IDs"); 2243 } 2244 2245 MutexLockerEx ml(Threads_lock); 2246 for (int i = 0; i < num_threads; i++) { 2247 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i)); 2248 if (java_thread != NULL) { 2249 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); 2250 } 2251 } 2252JVM_END 2253 2254// Returns the CPU time consumed by a given thread (in nanoseconds). 2255// If thread_id == 0, CPU time for the current thread is returned. 2256// If user_sys_cpu_time = true, user level and system CPU time of 2257// a given thread is returned; otherwise, only user level CPU time 2258// is returned. 2259JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) 2260 if (!os::is_thread_cpu_time_supported()) { 2261 return -1; 2262 } 2263 2264 if (thread_id < 0) { 2265 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2266 "Invalid thread ID", -1); 2267 } 2268 2269 JavaThread* java_thread = NULL; 2270 if (thread_id == 0) { 2271 // current thread 2272 return os::current_thread_cpu_time(user_sys_cpu_time != 0); 2273 } else { 2274 MutexLockerEx ml(Threads_lock); 2275 java_thread = Threads::find_java_thread_from_java_tid(thread_id); 2276 if (java_thread != NULL) { 2277 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); 2278 } 2279 } 2280 return -1; 2281JVM_END 2282 2283// Gets an array containing the CPU times consumed by a set of threads 2284// (in nanoseconds). Each element of the array is the CPU time for the 2285// thread ID specified in the corresponding entry in the given array 2286// of thread IDs; or -1 if the thread does not exist or has terminated. 2287// If user_sys_cpu_time = true, the sum of user level and system CPU time 2288// for the given thread is returned; otherwise, only user level CPU time 2289// is returned. 2290JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, 2291 jlongArray timeArray, 2292 jboolean user_sys_cpu_time)) 2293 // Check if threads is null 2294 if (ids == NULL || timeArray == NULL) { 2295 THROW(vmSymbols::java_lang_NullPointerException()); 2296 } 2297 2298 ResourceMark rm(THREAD); 2299 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 2300 typeArrayHandle ids_ah(THREAD, ta); 2301 2302 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); 2303 typeArrayHandle timeArray_h(THREAD, tia); 2304 2305 // validate the thread id array 2306 validate_thread_id_array(ids_ah, CHECK); 2307 2308 // timeArray must be of the same length as the given array of thread IDs 2309 int num_threads = ids_ah->length(); 2310 if (num_threads != timeArray_h->length()) { 2311 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2312 "The length of the given long array does not match the length of " 2313 "the given array of thread IDs"); 2314 } 2315 2316 MutexLockerEx ml(Threads_lock); 2317 for (int i = 0; i < num_threads; i++) { 2318 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i)); 2319 if (java_thread != NULL) { 2320 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, 2321 user_sys_cpu_time != 0)); 2322 } 2323 } 2324JVM_END 2325 2326 2327 2328#if INCLUDE_MANAGEMENT 2329const struct jmmInterface_1_ jmm_interface = { 2330 NULL, 2331 NULL, 2332 jmm_GetVersion, 2333 jmm_GetOptionalSupport, 2334 jmm_GetInputArguments, 2335 jmm_GetThreadInfo, 2336 jmm_GetInputArgumentArray, 2337 jmm_GetMemoryPools, 2338 jmm_GetMemoryManagers, 2339 jmm_GetMemoryPoolUsage, 2340 jmm_GetPeakMemoryPoolUsage, 2341 jmm_GetThreadAllocatedMemory, 2342 jmm_GetMemoryUsage, 2343 jmm_GetLongAttribute, 2344 jmm_GetBoolAttribute, 2345 jmm_SetBoolAttribute, 2346 jmm_GetLongAttributes, 2347 jmm_FindMonitorDeadlockedThreads, 2348 jmm_GetThreadCpuTime, 2349 jmm_GetVMGlobalNames, 2350 jmm_GetVMGlobals, 2351 jmm_GetInternalThreadTimes, 2352 jmm_ResetStatistic, 2353 jmm_SetPoolSensor, 2354 jmm_SetPoolThreshold, 2355 jmm_GetPoolCollectionUsage, 2356 jmm_GetGCExtAttributeInfo, 2357 jmm_GetLastGCStat, 2358 jmm_GetThreadCpuTimeWithKind, 2359 jmm_GetThreadCpuTimesWithKind, 2360 jmm_DumpHeap0, 2361 jmm_FindDeadlockedThreads, 2362 jmm_SetVMGlobal, 2363 NULL, 2364 jmm_DumpThreads, 2365 jmm_SetGCNotificationEnabled, 2366 jmm_GetDiagnosticCommands, 2367 jmm_GetDiagnosticCommandInfo, 2368 jmm_GetDiagnosticCommandArgumentsInfo, 2369 jmm_ExecuteDiagnosticCommand, 2370 jmm_SetDiagnosticFrameworkNotificationEnabled 2371}; 2372#endif // INCLUDE_MANAGEMENT 2373 2374void* Management::get_jmm_interface(int version) { 2375#if INCLUDE_MANAGEMENT 2376 if (version == JMM_VERSION_1_0) { 2377 return (void*) &jmm_interface; 2378 } 2379#endif // INCLUDE_MANAGEMENT 2380 return NULL; 2381} 2382