1 /* 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "compiler/compileBroker.hpp" 28 #include "memory/iterator.hpp" 29 #include "memory/oopFactory.hpp" 30 #include "memory/resourceArea.hpp" 31 #include "oops/klass.hpp" 32 #include "oops/objArrayKlass.hpp" 33 #include "oops/oop.inline.hpp" 34 #include "runtime/arguments.hpp" 35 #include "runtime/globals.hpp" 36 #include "runtime/handles.inline.hpp" 37 #include "runtime/interfaceSupport.hpp" 38 #include "runtime/javaCalls.hpp" 39 #include "runtime/jniHandles.hpp" 40 #include "runtime/os.hpp" 41 #include "runtime/serviceThread.hpp" 42 #include "services/classLoadingService.hpp" 43 #include "services/diagnosticCommand.hpp" 44 #include "services/diagnosticFramework.hpp" 45 #include "services/heapDumper.hpp" 46 #include "services/jmm.h" 47 #include "services/lowMemoryDetector.hpp" 48 #include "services/gcNotifier.hpp" 49 #include "services/nmtDCmd.hpp" 50 #include "services/management.hpp" 51 #include "services/memoryManager.hpp" 52 #include "services/memoryPool.hpp" 53 #include "services/memoryService.hpp" 54 #include "services/runtimeService.hpp" 55 #include "services/threadService.hpp" 56 #include "utilities/macros.hpp" 57 58 PerfVariable* Management::_begin_vm_creation_time = NULL; 59 PerfVariable* Management::_end_vm_creation_time = NULL; 60 PerfVariable* Management::_vm_init_done_time = NULL; 61 62 Klass* Management::_sensor_klass = NULL; 63 Klass* Management::_threadInfo_klass = NULL; 64 Klass* Management::_memoryUsage_klass = NULL; 65 Klass* Management::_memoryPoolMXBean_klass = NULL; 66 Klass* Management::_memoryManagerMXBean_klass = NULL; 67 Klass* Management::_garbageCollectorMXBean_klass = NULL; 68 Klass* Management::_managementFactory_klass = NULL; 69 Klass* Management::_garbageCollectorImpl_klass = NULL; 70 Klass* Management::_gcInfo_klass = NULL; 71 Klass* Management::_diagnosticCommandImpl_klass = NULL; 72 Klass* Management::_managementFactoryHelper_klass = NULL; 73 74 75 jmmOptionalSupport Management::_optional_support = {0}; 76 TimeStamp Management::_stamp; 77 78 void management_init() { 79 #if INCLUDE_MANAGEMENT 80 Management::init(); 81 ThreadService::init(); 82 RuntimeService::init(); 83 ClassLoadingService::init(); 84 #else 85 ThreadService::init(); 86 // Make sure the VM version is initialized 87 // This is normally called by RuntimeService::init(). 88 // Since that is conditionalized out, we need to call it here. 89 Abstract_VM_Version::initialize(); 90 #endif // INCLUDE_MANAGEMENT 91 } 92 93 #if INCLUDE_MANAGEMENT 94 95 void Management::init() { 96 EXCEPTION_MARK; 97 98 // These counters are for java.lang.management API support. 99 // They are created even if -XX:-UsePerfData is set and in 100 // that case, they will be allocated on C heap. 101 102 _begin_vm_creation_time = 103 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", 104 PerfData::U_None, CHECK); 105 106 _end_vm_creation_time = 107 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", 108 PerfData::U_None, CHECK); 109 110 _vm_init_done_time = 111 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", 112 PerfData::U_None, CHECK); 113 114 // Initialize optional support 115 _optional_support.isLowMemoryDetectionSupported = 1; 116 _optional_support.isCompilationTimeMonitoringSupported = 1; 117 _optional_support.isThreadContentionMonitoringSupported = 1; 118 119 if (os::is_thread_cpu_time_supported()) { 120 _optional_support.isCurrentThreadCpuTimeSupported = 1; 121 _optional_support.isOtherThreadCpuTimeSupported = 1; 122 } else { 123 _optional_support.isCurrentThreadCpuTimeSupported = 0; 124 _optional_support.isOtherThreadCpuTimeSupported = 0; 125 } 126 127 _optional_support.isBootClassPathSupported = 1; 128 _optional_support.isObjectMonitorUsageSupported = 1; 129 #if INCLUDE_SERVICES 130 // This depends on the heap inspector 131 _optional_support.isSynchronizerUsageSupported = 1; 132 #endif // INCLUDE_SERVICES 133 _optional_support.isThreadAllocatedMemorySupported = 1; 134 _optional_support.isRemoteDiagnosticCommandsSupported = 1; 135 136 // Registration of the diagnostic commands 137 DCmdRegistrant::register_dcmds(); 138 DCmdRegistrant::register_dcmds_ext(); 139 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 140 | DCmd_Source_MBean; 141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 142 } 143 144 void Management::initialize(TRAPS) { 145 // Start the service thread 146 ServiceThread::initialize(); 147 148 if (ManagementServer) { 149 ResourceMark rm(THREAD); 150 HandleMark hm(THREAD); 151 152 // Load and initialize the sun.management.Agent class 153 // invoke startAgent method to start the management server 154 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 155 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), 156 loader, 157 Handle(), 158 true, 159 CHECK); 160 instanceKlassHandle ik (THREAD, k); 161 162 JavaValue result(T_VOID); 163 JavaCalls::call_static(&result, 164 ik, 165 vmSymbols::startAgent_name(), 166 vmSymbols::void_method_signature(), 167 CHECK); 168 } 169 } 170 171 void Management::get_optional_support(jmmOptionalSupport* support) { 172 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); 173 } 174 175 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) { 176 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); 177 instanceKlassHandle ik (THREAD, k); 178 if (ik->should_be_initialized()) { 179 ik->initialize(CHECK_NULL); 180 } 181 // If these classes change to not be owned by the boot loader, they need 182 // to be walked to keep their class loader alive in oops_do. 183 assert(ik->class_loader() == NULL, "need to follow in oops_do"); 184 return ik(); 185 } 186 187 void Management::record_vm_startup_time(jlong begin, jlong duration) { 188 // if the performance counter is not initialized, 189 // then vm initialization failed; simply return. 190 if (_begin_vm_creation_time == NULL) return; 191 192 _begin_vm_creation_time->set_value(begin); 193 _end_vm_creation_time->set_value(begin + duration); 194 PerfMemory::set_accessible(true); 195 } 196 197 jlong Management::timestamp() { 198 TimeStamp t; 199 t.update(); 200 return t.ticks() - _stamp.ticks(); 201 } 202 203 void Management::oops_do(OopClosure* f) { 204 MemoryService::oops_do(f); 205 ThreadService::oops_do(f); 206 } 207 208 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) { 209 if (_threadInfo_klass == NULL) { 210 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); 211 } 212 return _threadInfo_klass; 213 } 214 215 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) { 216 if (_memoryUsage_klass == NULL) { 217 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); 218 } 219 return _memoryUsage_klass; 220 } 221 222 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { 223 if (_memoryPoolMXBean_klass == NULL) { 224 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); 225 } 226 return _memoryPoolMXBean_klass; 227 } 228 229 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { 230 if (_memoryManagerMXBean_klass == NULL) { 231 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); 232 } 233 return _memoryManagerMXBean_klass; 234 } 235 236 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { 237 if (_garbageCollectorMXBean_klass == NULL) { 238 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); 239 } 240 return _garbageCollectorMXBean_klass; 241 } 242 243 Klass* Management::sun_management_Sensor_klass(TRAPS) { 244 if (_sensor_klass == NULL) { 245 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); 246 } 247 return _sensor_klass; 248 } 249 250 Klass* Management::sun_management_ManagementFactory_klass(TRAPS) { 251 if (_managementFactory_klass == NULL) { 252 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); 253 } 254 return _managementFactory_klass; 255 } 256 257 Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { 258 if (_garbageCollectorImpl_klass == NULL) { 259 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); 260 } 261 return _garbageCollectorImpl_klass; 262 } 263 264 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) { 265 if (_gcInfo_klass == NULL) { 266 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); 267 } 268 return _gcInfo_klass; 269 } 270 271 Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) { 272 if (_diagnosticCommandImpl_klass == NULL) { 273 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL); 274 } 275 return _diagnosticCommandImpl_klass; 276 } 277 278 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) { 279 if (_managementFactoryHelper_klass == NULL) { 280 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL); 281 } 282 return _managementFactoryHelper_klass; 283 } 284 285 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { 286 Handle snapshot_thread(THREAD, snapshot->threadObj()); 287 288 jlong contended_time; 289 jlong waited_time; 290 if (ThreadService::is_thread_monitoring_contention()) { 291 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); 292 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); 293 } else { 294 // set them to -1 if thread contention monitoring is disabled. 295 contended_time = max_julong; 296 waited_time = max_julong; 297 } 298 299 int thread_status = snapshot->thread_status(); 300 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); 301 if (snapshot->is_ext_suspended()) { 302 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; 303 } 304 if (snapshot->is_in_native()) { 305 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; 306 } 307 308 ThreadStackTrace* st = snapshot->get_stack_trace(); 309 Handle stacktrace_h; 310 if (st != NULL) { 311 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); 312 } else { 313 stacktrace_h = Handle(); 314 } 315 316 args->push_oop(snapshot_thread); 317 args->push_int(thread_status); 318 args->push_oop(Handle(THREAD, snapshot->blocker_object())); 319 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); 320 args->push_long(snapshot->contended_enter_count()); 321 args->push_long(contended_time); 322 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); 323 args->push_long(waited_time); 324 args->push_oop(stacktrace_h); 325 } 326 327 // Helper function to construct a ThreadInfo object 328 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { 329 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 330 instanceKlassHandle ik (THREAD, k); 331 332 JavaValue result(T_VOID); 333 JavaCallArguments args(14); 334 335 // First allocate a ThreadObj object and 336 // push the receiver as the first argument 337 Handle element = ik->allocate_instance_handle(CHECK_NULL); 338 args.push_oop(element); 339 340 // initialize the arguments for the ThreadInfo constructor 341 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 342 343 // Call ThreadInfo constructor with no locked monitors and synchronizers 344 JavaCalls::call_special(&result, 345 ik, 346 vmSymbols::object_initializer_name(), 347 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), 348 &args, 349 CHECK_NULL); 350 351 return (instanceOop) element(); 352 } 353 354 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, 355 objArrayHandle monitors_array, 356 typeArrayHandle depths_array, 357 objArrayHandle synchronizers_array, 358 TRAPS) { 359 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 360 instanceKlassHandle ik (THREAD, k); 361 362 JavaValue result(T_VOID); 363 JavaCallArguments args(17); 364 365 // First allocate a ThreadObj object and 366 // push the receiver as the first argument 367 Handle element = ik->allocate_instance_handle(CHECK_NULL); 368 args.push_oop(element); 369 370 // initialize the arguments for the ThreadInfo constructor 371 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 372 373 // push the locked monitors and synchronizers in the arguments 374 args.push_oop(monitors_array); 375 args.push_oop(depths_array); 376 args.push_oop(synchronizers_array); 377 378 // Call ThreadInfo constructor with locked monitors and synchronizers 379 JavaCalls::call_special(&result, 380 ik, 381 vmSymbols::object_initializer_name(), 382 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), 383 &args, 384 CHECK_NULL); 385 386 return (instanceOop) element(); 387 } 388 389 // Helper functions 390 static JavaThread* find_java_thread_from_id(jlong thread_id) { 391 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); 392 393 JavaThread* java_thread = NULL; 394 // Sequential search for now. Need to do better optimization later. 395 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { 396 oop tobj = thread->threadObj(); 397 if (!thread->is_exiting() && 398 tobj != NULL && 399 thread_id == java_lang_Thread::thread_id(tobj)) { 400 java_thread = thread; 401 break; 402 } 403 } 404 return java_thread; 405 } 406 407 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { 408 if (mgr == NULL) { 409 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 410 } 411 oop mgr_obj = JNIHandles::resolve(mgr); 412 instanceHandle h(THREAD, (instanceOop) mgr_obj); 413 414 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); 415 if (!h->is_a(k)) { 416 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 417 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", 418 NULL); 419 } 420 421 MemoryManager* gc = MemoryService::get_memory_manager(h); 422 if (gc == NULL || !gc->is_gc_memory_manager()) { 423 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 424 "Invalid GC memory manager", 425 NULL); 426 } 427 return (GCMemoryManager*) gc; 428 } 429 430 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { 431 if (obj == NULL) { 432 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 433 } 434 435 oop pool_obj = JNIHandles::resolve(obj); 436 assert(pool_obj->is_instance(), "Should be an instanceOop"); 437 instanceHandle ph(THREAD, (instanceOop) pool_obj); 438 439 return MemoryService::get_memory_pool(ph); 440 } 441 442 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { 443 int num_threads = ids_ah->length(); 444 445 // Validate input thread IDs 446 int i = 0; 447 for (i = 0; i < num_threads; i++) { 448 jlong tid = ids_ah->long_at(i); 449 if (tid <= 0) { 450 // throw exception if invalid thread id. 451 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 452 "Invalid thread ID entry"); 453 } 454 } 455 } 456 457 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { 458 // check if the element of infoArray is of type ThreadInfo class 459 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); 460 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass(); 461 if (element_klass != threadinfo_klass) { 462 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 463 "infoArray element type is not ThreadInfo class"); 464 } 465 } 466 467 468 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { 469 if (obj == NULL) { 470 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 471 } 472 473 oop mgr_obj = JNIHandles::resolve(obj); 474 assert(mgr_obj->is_instance(), "Should be an instanceOop"); 475 instanceHandle mh(THREAD, (instanceOop) mgr_obj); 476 477 return MemoryService::get_memory_manager(mh); 478 } 479 480 // Returns a version string and sets major and minor version if 481 // the input parameters are non-null. 482 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) 483 return JMM_VERSION; 484 JVM_END 485 486 // Gets the list of VM monitoring and management optional supports 487 // Returns 0 if succeeded; otherwise returns non-zero. 488 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) 489 if (support == NULL) { 490 return -1; 491 } 492 Management::get_optional_support(support); 493 return 0; 494 JVM_END 495 496 // Returns a java.lang.String object containing the input arguments to the VM. 497 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) 498 ResourceMark rm(THREAD); 499 500 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 501 return NULL; 502 } 503 504 char** vm_flags = Arguments::jvm_flags_array(); 505 char** vm_args = Arguments::jvm_args_array(); 506 int num_flags = Arguments::num_jvm_flags(); 507 int num_args = Arguments::num_jvm_args(); 508 509 size_t length = 1; // null terminator 510 int i; 511 for (i = 0; i < num_flags; i++) { 512 length += strlen(vm_flags[i]); 513 } 514 for (i = 0; i < num_args; i++) { 515 length += strlen(vm_args[i]); 516 } 517 // add a space between each argument 518 length += num_flags + num_args - 1; 519 520 // Return the list of input arguments passed to the VM 521 // and preserve the order that the VM processes. 522 char* args = NEW_RESOURCE_ARRAY(char, length); 523 args[0] = '\0'; 524 // concatenate all jvm_flags 525 if (num_flags > 0) { 526 strcat(args, vm_flags[0]); 527 for (i = 1; i < num_flags; i++) { 528 strcat(args, " "); 529 strcat(args, vm_flags[i]); 530 } 531 } 532 533 if (num_args > 0 && num_flags > 0) { 534 // append a space if args already contains one or more jvm_flags 535 strcat(args, " "); 536 } 537 538 // concatenate all jvm_args 539 if (num_args > 0) { 540 strcat(args, vm_args[0]); 541 for (i = 1; i < num_args; i++) { 542 strcat(args, " "); 543 strcat(args, vm_args[i]); 544 } 545 } 546 547 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); 548 return JNIHandles::make_local(env, hargs()); 549 JVM_END 550 551 // Returns an array of java.lang.String object containing the input arguments to the VM. 552 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) 553 ResourceMark rm(THREAD); 554 555 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 556 return NULL; 557 } 558 559 char** vm_flags = Arguments::jvm_flags_array(); 560 char** vm_args = Arguments::jvm_args_array(); 561 int num_flags = Arguments::num_jvm_flags(); 562 int num_args = Arguments::num_jvm_args(); 563 564 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); 565 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); 566 objArrayHandle result_h(THREAD, r); 567 568 int index = 0; 569 for (int j = 0; j < num_flags; j++, index++) { 570 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 571 result_h->obj_at_put(index, h()); 572 } 573 for (int i = 0; i < num_args; i++, index++) { 574 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 575 result_h->obj_at_put(index, h()); 576 } 577 return (jobjectArray) JNIHandles::make_local(env, result_h()); 578 JVM_END 579 580 // Returns an array of java/lang/management/MemoryPoolMXBean object 581 // one for each memory pool if obj == null; otherwise returns 582 // an array of memory pools for a given memory manager if 583 // it is a valid memory manager. 584 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) 585 ResourceMark rm(THREAD); 586 587 int num_memory_pools; 588 MemoryManager* mgr = NULL; 589 if (obj == NULL) { 590 num_memory_pools = MemoryService::num_memory_pools(); 591 } else { 592 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); 593 if (mgr == NULL) { 594 return NULL; 595 } 596 num_memory_pools = mgr->num_memory_pools(); 597 } 598 599 // Allocate the resulting MemoryPoolMXBean[] object 600 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); 601 instanceKlassHandle ik (THREAD, k); 602 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); 603 objArrayHandle poolArray(THREAD, r); 604 605 if (mgr == NULL) { 606 // Get all memory pools 607 for (int i = 0; i < num_memory_pools; i++) { 608 MemoryPool* pool = MemoryService::get_memory_pool(i); 609 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 610 instanceHandle ph(THREAD, p); 611 poolArray->obj_at_put(i, ph()); 612 } 613 } else { 614 // Get memory pools managed by a given memory manager 615 for (int i = 0; i < num_memory_pools; i++) { 616 MemoryPool* pool = mgr->get_memory_pool(i); 617 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 618 instanceHandle ph(THREAD, p); 619 poolArray->obj_at_put(i, ph()); 620 } 621 } 622 return (jobjectArray) JNIHandles::make_local(env, poolArray()); 623 JVM_END 624 625 // Returns an array of java/lang/management/MemoryManagerMXBean object 626 // one for each memory manager if obj == null; otherwise returns 627 // an array of memory managers for a given memory pool if 628 // it is a valid memory pool. 629 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) 630 ResourceMark rm(THREAD); 631 632 int num_mgrs; 633 MemoryPool* pool = NULL; 634 if (obj == NULL) { 635 num_mgrs = MemoryService::num_memory_managers(); 636 } else { 637 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 638 if (pool == NULL) { 639 return NULL; 640 } 641 num_mgrs = pool->num_memory_managers(); 642 } 643 644 // Allocate the resulting MemoryManagerMXBean[] object 645 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); 646 instanceKlassHandle ik (THREAD, k); 647 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); 648 objArrayHandle mgrArray(THREAD, r); 649 650 if (pool == NULL) { 651 // Get all memory managers 652 for (int i = 0; i < num_mgrs; i++) { 653 MemoryManager* mgr = MemoryService::get_memory_manager(i); 654 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 655 instanceHandle ph(THREAD, p); 656 mgrArray->obj_at_put(i, ph()); 657 } 658 } else { 659 // Get memory managers for a given memory pool 660 for (int i = 0; i < num_mgrs; i++) { 661 MemoryManager* mgr = pool->get_memory_manager(i); 662 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 663 instanceHandle ph(THREAD, p); 664 mgrArray->obj_at_put(i, ph()); 665 } 666 } 667 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); 668 JVM_END 669 670 671 // Returns a java/lang/management/MemoryUsage object containing the memory usage 672 // of a given memory pool. 673 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) 674 ResourceMark rm(THREAD); 675 676 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 677 if (pool != NULL) { 678 MemoryUsage usage = pool->get_memory_usage(); 679 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 680 return JNIHandles::make_local(env, h()); 681 } else { 682 return NULL; 683 } 684 JVM_END 685 686 // Returns a java/lang/management/MemoryUsage object containing the memory usage 687 // of a given memory pool. 688 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) 689 ResourceMark rm(THREAD); 690 691 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 692 if (pool != NULL) { 693 MemoryUsage usage = pool->get_peak_memory_usage(); 694 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 695 return JNIHandles::make_local(env, h()); 696 } else { 697 return NULL; 698 } 699 JVM_END 700 701 // Returns a java/lang/management/MemoryUsage object containing the memory usage 702 // of a given memory pool after most recent GC. 703 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) 704 ResourceMark rm(THREAD); 705 706 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 707 if (pool != NULL && pool->is_collected_pool()) { 708 MemoryUsage usage = pool->get_last_collection_usage(); 709 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 710 return JNIHandles::make_local(env, h()); 711 } else { 712 return NULL; 713 } 714 JVM_END 715 716 // Sets the memory pool sensor for a threshold type 717 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) 718 if (obj == NULL || sensorObj == NULL) { 719 THROW(vmSymbols::java_lang_NullPointerException()); 720 } 721 722 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK); 723 oop s = JNIHandles::resolve(sensorObj); 724 assert(s->is_instance(), "Sensor should be an instanceOop"); 725 instanceHandle sensor_h(THREAD, (instanceOop) s); 726 if (!sensor_h->is_a(sensor_klass)) { 727 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 728 "Sensor is not an instance of sun.management.Sensor class"); 729 } 730 731 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); 732 assert(mpool != NULL, "MemoryPool should exist"); 733 734 switch (type) { 735 case JMM_USAGE_THRESHOLD_HIGH: 736 case JMM_USAGE_THRESHOLD_LOW: 737 // have only one sensor for threshold high and low 738 mpool->set_usage_sensor_obj(sensor_h); 739 break; 740 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 741 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 742 // have only one sensor for threshold high and low 743 mpool->set_gc_usage_sensor_obj(sensor_h); 744 break; 745 default: 746 assert(false, "Unrecognized type"); 747 } 748 749 JVM_END 750 751 752 // Sets the threshold of a given memory pool. 753 // Returns the previous threshold. 754 // 755 // Input parameters: 756 // pool - the MemoryPoolMXBean object 757 // type - threshold type 758 // threshold - the new threshold (must not be negative) 759 // 760 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) 761 if (threshold < 0) { 762 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 763 "Invalid threshold value", 764 -1); 765 } 766 767 if ((size_t)threshold > max_uintx) { 768 stringStream st; 769 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); 770 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); 771 } 772 773 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); 774 assert(pool != NULL, "MemoryPool should exist"); 775 776 jlong prev = 0; 777 switch (type) { 778 case JMM_USAGE_THRESHOLD_HIGH: 779 if (!pool->usage_threshold()->is_high_threshold_supported()) { 780 return -1; 781 } 782 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); 783 break; 784 785 case JMM_USAGE_THRESHOLD_LOW: 786 if (!pool->usage_threshold()->is_low_threshold_supported()) { 787 return -1; 788 } 789 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); 790 break; 791 792 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 793 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { 794 return -1; 795 } 796 // return and the new threshold is effective for the next GC 797 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); 798 799 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 800 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { 801 return -1; 802 } 803 // return and the new threshold is effective for the next GC 804 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); 805 806 default: 807 assert(false, "Unrecognized type"); 808 return -1; 809 } 810 811 // When the threshold is changed, reevaluate if the low memory 812 // detection is enabled. 813 if (prev != threshold) { 814 LowMemoryDetector::recompute_enabled_for_collected_pools(); 815 LowMemoryDetector::detect_low_memory(pool); 816 } 817 return prev; 818 JVM_END 819 820 // Gets an array containing the amount of memory allocated on the Java 821 // heap for a set of threads (in bytes). Each element of the array is 822 // the amount of memory allocated for the thread ID specified in the 823 // corresponding entry in the given array of thread IDs; or -1 if the 824 // thread does not exist or has terminated. 825 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, 826 jlongArray sizeArray)) 827 // Check if threads is null 828 if (ids == NULL || sizeArray == NULL) { 829 THROW(vmSymbols::java_lang_NullPointerException()); 830 } 831 832 ResourceMark rm(THREAD); 833 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 834 typeArrayHandle ids_ah(THREAD, ta); 835 836 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); 837 typeArrayHandle sizeArray_h(THREAD, sa); 838 839 // validate the thread id array 840 validate_thread_id_array(ids_ah, CHECK); 841 842 // sizeArray must be of the same length as the given array of thread IDs 843 int num_threads = ids_ah->length(); 844 if (num_threads != sizeArray_h->length()) { 845 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 846 "The length of the given long array does not match the length of " 847 "the given array of thread IDs"); 848 } 849 850 MutexLockerEx ml(Threads_lock); 851 for (int i = 0; i < num_threads; i++) { 852 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 853 if (java_thread != NULL) { 854 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); 855 } 856 } 857 JVM_END 858 859 // Returns a java/lang/management/MemoryUsage object representing 860 // the memory usage for the heap or non-heap memory. 861 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) 862 ResourceMark rm(THREAD); 863 864 // Calculate the memory usage 865 size_t total_init = 0; 866 size_t total_used = 0; 867 size_t total_committed = 0; 868 size_t total_max = 0; 869 bool has_undefined_init_size = false; 870 bool has_undefined_max_size = false; 871 872 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 873 MemoryPool* pool = MemoryService::get_memory_pool(i); 874 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { 875 MemoryUsage u = pool->get_memory_usage(); 876 total_used += u.used(); 877 total_committed += u.committed(); 878 879 if (u.init_size() == (size_t)-1) { 880 has_undefined_init_size = true; 881 } 882 if (!has_undefined_init_size) { 883 total_init += u.init_size(); 884 } 885 886 if (u.max_size() == (size_t)-1) { 887 has_undefined_max_size = true; 888 } 889 if (!has_undefined_max_size) { 890 total_max += u.max_size(); 891 } 892 } 893 } 894 895 // if any one of the memory pool has undefined init_size or max_size, 896 // set it to -1 897 if (has_undefined_init_size) { 898 total_init = (size_t)-1; 899 } 900 if (has_undefined_max_size) { 901 total_max = (size_t)-1; 902 } 903 904 MemoryUsage usage((heap ? InitialHeapSize : total_init), 905 total_used, 906 total_committed, 907 (heap ? Universe::heap()->max_capacity() : total_max)); 908 909 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 910 return JNIHandles::make_local(env, obj()); 911 JVM_END 912 913 // Returns the boolean value of a given attribute. 914 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) 915 switch (att) { 916 case JMM_VERBOSE_GC: 917 return MemoryService::get_verbose(); 918 case JMM_VERBOSE_CLASS: 919 return ClassLoadingService::get_verbose(); 920 case JMM_THREAD_CONTENTION_MONITORING: 921 return ThreadService::is_thread_monitoring_contention(); 922 case JMM_THREAD_CPU_TIME: 923 return ThreadService::is_thread_cpu_time_enabled(); 924 case JMM_THREAD_ALLOCATED_MEMORY: 925 return ThreadService::is_thread_allocated_memory_enabled(); 926 default: 927 assert(0, "Unrecognized attribute"); 928 return false; 929 } 930 JVM_END 931 932 // Sets the given boolean attribute and returns the previous value. 933 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) 934 switch (att) { 935 case JMM_VERBOSE_GC: 936 return MemoryService::set_verbose(flag != 0); 937 case JMM_VERBOSE_CLASS: 938 return ClassLoadingService::set_verbose(flag != 0); 939 case JMM_THREAD_CONTENTION_MONITORING: 940 return ThreadService::set_thread_monitoring_contention(flag != 0); 941 case JMM_THREAD_CPU_TIME: 942 return ThreadService::set_thread_cpu_time_enabled(flag != 0); 943 case JMM_THREAD_ALLOCATED_MEMORY: 944 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); 945 default: 946 assert(0, "Unrecognized attribute"); 947 return false; 948 } 949 JVM_END 950 951 952 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { 953 switch (att) { 954 case JMM_GC_TIME_MS: 955 return mgr->gc_time_ms(); 956 957 case JMM_GC_COUNT: 958 return mgr->gc_count(); 959 960 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: 961 // current implementation only has 1 ext attribute 962 return 1; 963 964 default: 965 assert(0, "Unrecognized GC attribute"); 966 return -1; 967 } 968 } 969 970 class VmThreadCountClosure: public ThreadClosure { 971 private: 972 int _count; 973 public: 974 VmThreadCountClosure() : _count(0) {}; 975 void do_thread(Thread* thread); 976 int count() { return _count; } 977 }; 978 979 void VmThreadCountClosure::do_thread(Thread* thread) { 980 // exclude externally visible JavaThreads 981 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 982 return; 983 } 984 985 _count++; 986 } 987 988 static jint get_vm_thread_count() { 989 VmThreadCountClosure vmtcc; 990 { 991 MutexLockerEx ml(Threads_lock); 992 Threads::threads_do(&vmtcc); 993 } 994 995 return vmtcc.count(); 996 } 997 998 static jint get_num_flags() { 999 // last flag entry is always NULL, so subtract 1 1000 int nFlags = (int) Flag::numFlags - 1; 1001 int count = 0; 1002 for (int i = 0; i < nFlags; i++) { 1003 Flag* flag = &Flag::flags[i]; 1004 // Exclude the locked (diagnostic, experimental) flags 1005 if (flag->is_unlocked() || flag->is_unlocker()) { 1006 count++; 1007 } 1008 } 1009 return count; 1010 } 1011 1012 static jlong get_long_attribute(jmmLongAttribute att) { 1013 switch (att) { 1014 case JMM_CLASS_LOADED_COUNT: 1015 return ClassLoadingService::loaded_class_count(); 1016 1017 case JMM_CLASS_UNLOADED_COUNT: 1018 return ClassLoadingService::unloaded_class_count(); 1019 1020 case JMM_THREAD_TOTAL_COUNT: 1021 return ThreadService::get_total_thread_count(); 1022 1023 case JMM_THREAD_LIVE_COUNT: 1024 return ThreadService::get_live_thread_count(); 1025 1026 case JMM_THREAD_PEAK_COUNT: 1027 return ThreadService::get_peak_thread_count(); 1028 1029 case JMM_THREAD_DAEMON_COUNT: 1030 return ThreadService::get_daemon_thread_count(); 1031 1032 case JMM_JVM_INIT_DONE_TIME_MS: 1033 return Management::vm_init_done_time(); 1034 1035 case JMM_JVM_UPTIME_MS: 1036 return Management::ticks_to_ms(os::elapsed_counter()); 1037 1038 case JMM_COMPILE_TOTAL_TIME_MS: 1039 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); 1040 1041 case JMM_OS_PROCESS_ID: 1042 return os::current_process_id(); 1043 1044 // Hotspot-specific counters 1045 case JMM_CLASS_LOADED_BYTES: 1046 return ClassLoadingService::loaded_class_bytes(); 1047 1048 case JMM_CLASS_UNLOADED_BYTES: 1049 return ClassLoadingService::unloaded_class_bytes(); 1050 1051 case JMM_SHARED_CLASS_LOADED_COUNT: 1052 return ClassLoadingService::loaded_shared_class_count(); 1053 1054 case JMM_SHARED_CLASS_UNLOADED_COUNT: 1055 return ClassLoadingService::unloaded_shared_class_count(); 1056 1057 1058 case JMM_SHARED_CLASS_LOADED_BYTES: 1059 return ClassLoadingService::loaded_shared_class_bytes(); 1060 1061 case JMM_SHARED_CLASS_UNLOADED_BYTES: 1062 return ClassLoadingService::unloaded_shared_class_bytes(); 1063 1064 case JMM_TOTAL_CLASSLOAD_TIME_MS: 1065 return ClassLoader::classloader_time_ms(); 1066 1067 case JMM_VM_GLOBAL_COUNT: 1068 return get_num_flags(); 1069 1070 case JMM_SAFEPOINT_COUNT: 1071 return RuntimeService::safepoint_count(); 1072 1073 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: 1074 return RuntimeService::safepoint_sync_time_ms(); 1075 1076 case JMM_TOTAL_STOPPED_TIME_MS: 1077 return RuntimeService::safepoint_time_ms(); 1078 1079 case JMM_TOTAL_APP_TIME_MS: 1080 return RuntimeService::application_time_ms(); 1081 1082 case JMM_VM_THREAD_COUNT: 1083 return get_vm_thread_count(); 1084 1085 case JMM_CLASS_INIT_TOTAL_COUNT: 1086 return ClassLoader::class_init_count(); 1087 1088 case JMM_CLASS_INIT_TOTAL_TIME_MS: 1089 return ClassLoader::class_init_time_ms(); 1090 1091 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: 1092 return ClassLoader::class_verify_time_ms(); 1093 1094 case JMM_METHOD_DATA_SIZE_BYTES: 1095 return ClassLoadingService::class_method_data_size(); 1096 1097 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: 1098 return os::physical_memory(); 1099 1100 default: 1101 return -1; 1102 } 1103 } 1104 1105 1106 // Returns the long value of a given attribute. 1107 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) 1108 if (obj == NULL) { 1109 return get_long_attribute(att); 1110 } else { 1111 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); 1112 if (mgr != NULL) { 1113 return get_gc_attribute(mgr, att); 1114 } 1115 } 1116 return -1; 1117 JVM_END 1118 1119 // Gets the value of all attributes specified in the given array 1120 // and sets the value in the result array. 1121 // Returns the number of attributes found. 1122 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, 1123 jobject obj, 1124 jmmLongAttribute* atts, 1125 jint count, 1126 jlong* result)) 1127 1128 int num_atts = 0; 1129 if (obj == NULL) { 1130 for (int i = 0; i < count; i++) { 1131 result[i] = get_long_attribute(atts[i]); 1132 if (result[i] != -1) { 1133 num_atts++; 1134 } 1135 } 1136 } else { 1137 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); 1138 for (int i = 0; i < count; i++) { 1139 result[i] = get_gc_attribute(mgr, atts[i]); 1140 if (result[i] != -1) { 1141 num_atts++; 1142 } 1143 } 1144 } 1145 return num_atts; 1146 JVM_END 1147 1148 // Helper function to do thread dump for a specific list of threads 1149 static void do_thread_dump(ThreadDumpResult* dump_result, 1150 typeArrayHandle ids_ah, // array of thread ID (long[]) 1151 int num_threads, 1152 int max_depth, 1153 bool with_locked_monitors, 1154 bool with_locked_synchronizers, 1155 TRAPS) { 1156 1157 // First get an array of threadObj handles. 1158 // A JavaThread may terminate before we get the stack trace. 1159 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 1160 { 1161 MutexLockerEx ml(Threads_lock); 1162 for (int i = 0; i < num_threads; i++) { 1163 jlong tid = ids_ah->long_at(i); 1164 JavaThread* jt = find_java_thread_from_id(tid); 1165 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); 1166 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); 1167 thread_handle_array->append(threadObj_h); 1168 } 1169 } 1170 1171 // Obtain thread dumps and thread snapshot information 1172 VM_ThreadDump op(dump_result, 1173 thread_handle_array, 1174 num_threads, 1175 max_depth, /* stack depth */ 1176 with_locked_monitors, 1177 with_locked_synchronizers); 1178 VMThread::execute(&op); 1179 } 1180 1181 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo 1182 // for the thread ID specified in the corresponding entry in 1183 // the given array of thread IDs; or NULL if the thread does not exist 1184 // or has terminated. 1185 // 1186 // Input parameters: 1187 // ids - array of thread IDs 1188 // maxDepth - the maximum depth of stack traces to be dumped: 1189 // maxDepth == -1 requests to dump entire stack trace. 1190 // maxDepth == 0 requests no stack trace. 1191 // infoArray - array of ThreadInfo objects 1192 // 1193 // QQQ - Why does this method return a value instead of void? 1194 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) 1195 // Check if threads is null 1196 if (ids == NULL || infoArray == NULL) { 1197 THROW_(vmSymbols::java_lang_NullPointerException(), -1); 1198 } 1199 1200 if (maxDepth < -1) { 1201 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1202 "Invalid maxDepth", -1); 1203 } 1204 1205 ResourceMark rm(THREAD); 1206 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1207 typeArrayHandle ids_ah(THREAD, ta); 1208 1209 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); 1210 objArrayOop oa = objArrayOop(infoArray_obj); 1211 objArrayHandle infoArray_h(THREAD, oa); 1212 1213 // validate the thread id array 1214 validate_thread_id_array(ids_ah, CHECK_0); 1215 1216 // validate the ThreadInfo[] parameters 1217 validate_thread_info_array(infoArray_h, CHECK_0); 1218 1219 // infoArray must be of the same length as the given array of thread IDs 1220 int num_threads = ids_ah->length(); 1221 if (num_threads != infoArray_h->length()) { 1222 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1223 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); 1224 } 1225 1226 if (JDK_Version::is_gte_jdk16x_version()) { 1227 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1228 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); 1229 } 1230 1231 // Must use ThreadDumpResult to store the ThreadSnapshot. 1232 // GC may occur after the thread snapshots are taken but before 1233 // this function returns. The threadObj and other oops kept 1234 // in the ThreadSnapshot are marked and adjusted during GC. 1235 ThreadDumpResult dump_result(num_threads); 1236 1237 if (maxDepth == 0) { 1238 // no stack trace dumped - do not need to stop the world 1239 { 1240 MutexLockerEx ml(Threads_lock); 1241 for (int i = 0; i < num_threads; i++) { 1242 jlong tid = ids_ah->long_at(i); 1243 JavaThread* jt = find_java_thread_from_id(tid); 1244 ThreadSnapshot* ts; 1245 if (jt == NULL) { 1246 // if the thread does not exist or now it is terminated, 1247 // create dummy snapshot 1248 ts = new ThreadSnapshot(); 1249 } else { 1250 ts = new ThreadSnapshot(jt); 1251 } 1252 dump_result.add_thread_snapshot(ts); 1253 } 1254 } 1255 } else { 1256 // obtain thread dump with the specific list of threads with stack trace 1257 do_thread_dump(&dump_result, 1258 ids_ah, 1259 num_threads, 1260 maxDepth, 1261 false, /* no locked monitor */ 1262 false, /* no locked synchronizers */ 1263 CHECK_0); 1264 } 1265 1266 int num_snapshots = dump_result.num_snapshots(); 1267 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); 1268 int index = 0; 1269 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { 1270 // For each thread, create an java/lang/management/ThreadInfo object 1271 // and fill with the thread information 1272 1273 if (ts->threadObj() == NULL) { 1274 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1275 infoArray_h->obj_at_put(index, NULL); 1276 continue; 1277 } 1278 1279 // Create java.lang.management.ThreadInfo object 1280 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); 1281 infoArray_h->obj_at_put(index, info_obj); 1282 } 1283 return 0; 1284 JVM_END 1285 1286 // Dump thread info for the specified threads. 1287 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo 1288 // for the thread ID specified in the corresponding entry in 1289 // the given array of thread IDs; or NULL if the thread does not exist 1290 // or has terminated. 1291 // 1292 // Input parameter: 1293 // ids - array of thread IDs; NULL indicates all live threads 1294 // locked_monitors - if true, dump locked object monitors 1295 // locked_synchronizers - if true, dump locked JSR-166 synchronizers 1296 // 1297 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) 1298 ResourceMark rm(THREAD); 1299 1300 if (JDK_Version::is_gte_jdk16x_version()) { 1301 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1302 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); 1303 } 1304 1305 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); 1306 int num_threads = (ta != NULL ? ta->length() : 0); 1307 typeArrayHandle ids_ah(THREAD, ta); 1308 1309 ThreadDumpResult dump_result(num_threads); // can safepoint 1310 1311 if (ids_ah() != NULL) { 1312 1313 // validate the thread id array 1314 validate_thread_id_array(ids_ah, CHECK_NULL); 1315 1316 // obtain thread dump of a specific list of threads 1317 do_thread_dump(&dump_result, 1318 ids_ah, 1319 num_threads, 1320 -1, /* entire stack */ 1321 (locked_monitors ? true : false), /* with locked monitors */ 1322 (locked_synchronizers ? true : false), /* with locked synchronizers */ 1323 CHECK_NULL); 1324 } else { 1325 // obtain thread dump of all threads 1326 VM_ThreadDump op(&dump_result, 1327 -1, /* entire stack */ 1328 (locked_monitors ? true : false), /* with locked monitors */ 1329 (locked_synchronizers ? true : false) /* with locked synchronizers */); 1330 VMThread::execute(&op); 1331 } 1332 1333 int num_snapshots = dump_result.num_snapshots(); 1334 1335 // create the result ThreadInfo[] object 1336 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 1337 instanceKlassHandle ik (THREAD, k); 1338 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); 1339 objArrayHandle result_h(THREAD, r); 1340 1341 int index = 0; 1342 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { 1343 if (ts->threadObj() == NULL) { 1344 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1345 result_h->obj_at_put(index, NULL); 1346 continue; 1347 } 1348 1349 ThreadStackTrace* stacktrace = ts->get_stack_trace(); 1350 assert(stacktrace != NULL, "Must have a stack trace dumped"); 1351 1352 // Create Object[] filled with locked monitors 1353 // Create int[] filled with the stack depth where a monitor was locked 1354 int num_frames = stacktrace->get_stack_depth(); 1355 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); 1356 1357 // Count the total number of locked monitors 1358 for (int i = 0; i < num_frames; i++) { 1359 StackFrameInfo* frame = stacktrace->stack_frame_at(i); 1360 num_locked_monitors += frame->num_locked_monitors(); 1361 } 1362 1363 objArrayHandle monitors_array; 1364 typeArrayHandle depths_array; 1365 objArrayHandle synchronizers_array; 1366 1367 if (locked_monitors) { 1368 // Constructs Object[] and int[] to contain the object monitor and the stack depth 1369 // where the thread locked it 1370 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); 1371 objArrayHandle mh(THREAD, array); 1372 monitors_array = mh; 1373 1374 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); 1375 typeArrayHandle dh(THREAD, tarray); 1376 depths_array = dh; 1377 1378 int count = 0; 1379 int j = 0; 1380 for (int depth = 0; depth < num_frames; depth++) { 1381 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); 1382 int len = frame->num_locked_monitors(); 1383 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); 1384 for (j = 0; j < len; j++) { 1385 oop monitor = locked_monitors->at(j); 1386 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); 1387 monitors_array->obj_at_put(count, monitor); 1388 depths_array->int_at_put(count, depth); 1389 count++; 1390 } 1391 } 1392 1393 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); 1394 for (j = 0; j < jni_locked_monitors->length(); j++) { 1395 oop object = jni_locked_monitors->at(j); 1396 assert(object != NULL && object->is_instance(), "must be a Java object"); 1397 monitors_array->obj_at_put(count, object); 1398 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info 1399 depths_array->int_at_put(count, -1); 1400 count++; 1401 } 1402 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); 1403 } 1404 1405 if (locked_synchronizers) { 1406 // Create Object[] filled with locked JSR-166 synchronizers 1407 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); 1408 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); 1409 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); 1410 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); 1411 1412 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); 1413 objArrayHandle sh(THREAD, array); 1414 synchronizers_array = sh; 1415 1416 for (int k = 0; k < num_locked_synchronizers; k++) { 1417 synchronizers_array->obj_at_put(k, locks->at(k)); 1418 } 1419 } 1420 1421 // Create java.lang.management.ThreadInfo object 1422 instanceOop info_obj = Management::create_thread_info_instance(ts, 1423 monitors_array, 1424 depths_array, 1425 synchronizers_array, 1426 CHECK_NULL); 1427 result_h->obj_at_put(index, info_obj); 1428 } 1429 1430 return (jobjectArray) JNIHandles::make_local(env, result_h()); 1431 JVM_END 1432 1433 // Returns an array of Class objects. 1434 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) 1435 ResourceMark rm(THREAD); 1436 1437 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter 1438 1439 int num_classes = lce.num_loaded_classes(); 1440 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); 1441 objArrayHandle classes_ah(THREAD, r); 1442 1443 for (int i = 0; i < num_classes; i++) { 1444 KlassHandle kh = lce.get_klass(i); 1445 oop mirror = kh()->java_mirror(); 1446 classes_ah->obj_at_put(i, mirror); 1447 } 1448 1449 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); 1450 JVM_END 1451 1452 // Reset statistic. Return true if the requested statistic is reset. 1453 // Otherwise, return false. 1454 // 1455 // Input parameters: 1456 // obj - specify which instance the statistic associated with to be reset 1457 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. 1458 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. 1459 // type - the type of statistic to be reset 1460 // 1461 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) 1462 ResourceMark rm(THREAD); 1463 1464 switch (type) { 1465 case JMM_STAT_PEAK_THREAD_COUNT: 1466 ThreadService::reset_peak_thread_count(); 1467 return true; 1468 1469 case JMM_STAT_THREAD_CONTENTION_COUNT: 1470 case JMM_STAT_THREAD_CONTENTION_TIME: { 1471 jlong tid = obj.j; 1472 if (tid < 0) { 1473 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); 1474 } 1475 1476 // Look for the JavaThread of this given tid 1477 MutexLockerEx ml(Threads_lock); 1478 if (tid == 0) { 1479 // reset contention statistics for all threads if tid == 0 1480 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { 1481 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1482 ThreadService::reset_contention_count_stat(java_thread); 1483 } else { 1484 ThreadService::reset_contention_time_stat(java_thread); 1485 } 1486 } 1487 } else { 1488 // reset contention statistics for a given thread 1489 JavaThread* java_thread = find_java_thread_from_id(tid); 1490 if (java_thread == NULL) { 1491 return false; 1492 } 1493 1494 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1495 ThreadService::reset_contention_count_stat(java_thread); 1496 } else { 1497 ThreadService::reset_contention_time_stat(java_thread); 1498 } 1499 } 1500 return true; 1501 break; 1502 } 1503 case JMM_STAT_PEAK_POOL_USAGE: { 1504 jobject o = obj.l; 1505 if (o == NULL) { 1506 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1507 } 1508 1509 oop pool_obj = JNIHandles::resolve(o); 1510 assert(pool_obj->is_instance(), "Should be an instanceOop"); 1511 instanceHandle ph(THREAD, (instanceOop) pool_obj); 1512 1513 MemoryPool* pool = MemoryService::get_memory_pool(ph); 1514 if (pool != NULL) { 1515 pool->reset_peak_memory_usage(); 1516 return true; 1517 } 1518 break; 1519 } 1520 case JMM_STAT_GC_STAT: { 1521 jobject o = obj.l; 1522 if (o == NULL) { 1523 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1524 } 1525 1526 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); 1527 if (mgr != NULL) { 1528 mgr->reset_gc_stat(); 1529 return true; 1530 } 1531 break; 1532 } 1533 default: 1534 assert(0, "Unknown Statistic Type"); 1535 } 1536 return false; 1537 JVM_END 1538 1539 // Returns the fast estimate of CPU time consumed by 1540 // a given thread (in nanoseconds). 1541 // If thread_id == 0, return CPU time for the current thread. 1542 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) 1543 if (!os::is_thread_cpu_time_supported()) { 1544 return -1; 1545 } 1546 1547 if (thread_id < 0) { 1548 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1549 "Invalid thread ID", -1); 1550 } 1551 1552 JavaThread* java_thread = NULL; 1553 if (thread_id == 0) { 1554 // current thread 1555 return os::current_thread_cpu_time(); 1556 } else { 1557 MutexLockerEx ml(Threads_lock); 1558 java_thread = find_java_thread_from_id(thread_id); 1559 if (java_thread != NULL) { 1560 return os::thread_cpu_time((Thread*) java_thread); 1561 } 1562 } 1563 return -1; 1564 JVM_END 1565 1566 // Returns the CPU time consumed by a given thread (in nanoseconds). 1567 // If thread_id == 0, CPU time for the current thread is returned. 1568 // If user_sys_cpu_time = true, user level and system CPU time of 1569 // a given thread is returned; otherwise, only user level CPU time 1570 // is returned. 1571 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) 1572 if (!os::is_thread_cpu_time_supported()) { 1573 return -1; 1574 } 1575 1576 if (thread_id < 0) { 1577 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1578 "Invalid thread ID", -1); 1579 } 1580 1581 JavaThread* java_thread = NULL; 1582 if (thread_id == 0) { 1583 // current thread 1584 return os::current_thread_cpu_time(user_sys_cpu_time != 0); 1585 } else { 1586 MutexLockerEx ml(Threads_lock); 1587 java_thread = find_java_thread_from_id(thread_id); 1588 if (java_thread != NULL) { 1589 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); 1590 } 1591 } 1592 return -1; 1593 JVM_END 1594 1595 // Gets an array containing the CPU times consumed by a set of threads 1596 // (in nanoseconds). Each element of the array is the CPU time for the 1597 // thread ID specified in the corresponding entry in the given array 1598 // of thread IDs; or -1 if the thread does not exist or has terminated. 1599 // If user_sys_cpu_time = true, the sum of user level and system CPU time 1600 // for the given thread is returned; otherwise, only user level CPU time 1601 // is returned. 1602 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, 1603 jlongArray timeArray, 1604 jboolean user_sys_cpu_time)) 1605 // Check if threads is null 1606 if (ids == NULL || timeArray == NULL) { 1607 THROW(vmSymbols::java_lang_NullPointerException()); 1608 } 1609 1610 ResourceMark rm(THREAD); 1611 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1612 typeArrayHandle ids_ah(THREAD, ta); 1613 1614 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); 1615 typeArrayHandle timeArray_h(THREAD, tia); 1616 1617 // validate the thread id array 1618 validate_thread_id_array(ids_ah, CHECK); 1619 1620 // timeArray must be of the same length as the given array of thread IDs 1621 int num_threads = ids_ah->length(); 1622 if (num_threads != timeArray_h->length()) { 1623 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1624 "The length of the given long array does not match the length of " 1625 "the given array of thread IDs"); 1626 } 1627 1628 MutexLockerEx ml(Threads_lock); 1629 for (int i = 0; i < num_threads; i++) { 1630 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 1631 if (java_thread != NULL) { 1632 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, 1633 user_sys_cpu_time != 0)); 1634 } 1635 } 1636 JVM_END 1637 1638 // Returns a String array of all VM global flag names 1639 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) 1640 // last flag entry is always NULL, so subtract 1 1641 int nFlags = (int) Flag::numFlags - 1; 1642 // allocate a temp array 1643 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1644 nFlags, CHECK_0); 1645 objArrayHandle flags_ah(THREAD, r); 1646 int num_entries = 0; 1647 for (int i = 0; i < nFlags; i++) { 1648 Flag* flag = &Flag::flags[i]; 1649 // Exclude notproduct and develop flags in product builds. 1650 if (flag->is_constant_in_binary()) { 1651 continue; 1652 } 1653 // Exclude the locked (experimental, diagnostic) flags 1654 if (flag->is_unlocked() || flag->is_unlocker()) { 1655 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0); 1656 flags_ah->obj_at_put(num_entries, s()); 1657 num_entries++; 1658 } 1659 } 1660 1661 if (num_entries < nFlags) { 1662 // Return array of right length 1663 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); 1664 for(int i = 0; i < num_entries; i++) { 1665 res->obj_at_put(i, flags_ah->obj_at(i)); 1666 } 1667 return (jobjectArray)JNIHandles::make_local(env, res); 1668 } 1669 1670 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); 1671 JVM_END 1672 1673 // Utility function used by jmm_GetVMGlobals. Returns false if flag type 1674 // can't be determined, true otherwise. If false is returned, then *global 1675 // will be incomplete and invalid. 1676 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { 1677 Handle flag_name; 1678 if (name() == NULL) { 1679 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false); 1680 } else { 1681 flag_name = name; 1682 } 1683 global->name = (jstring)JNIHandles::make_local(env, flag_name()); 1684 1685 if (flag->is_bool()) { 1686 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; 1687 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; 1688 } else if (flag->is_intx()) { 1689 global->value.j = (jlong)flag->get_intx(); 1690 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1691 } else if (flag->is_uintx()) { 1692 global->value.j = (jlong)flag->get_uintx(); 1693 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1694 } else if (flag->is_uint64_t()) { 1695 global->value.j = (jlong)flag->get_uint64_t(); 1696 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1697 } else if (flag->is_ccstr()) { 1698 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); 1699 global->value.l = (jobject)JNIHandles::make_local(env, str()); 1700 global->type = JMM_VMGLOBAL_TYPE_JSTRING; 1701 } else { 1702 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; 1703 return false; 1704 } 1705 1706 global->writeable = flag->is_writeable(); 1707 global->external = flag->is_external(); 1708 switch (flag->get_origin()) { 1709 case Flag::DEFAULT: 1710 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; 1711 break; 1712 case Flag::COMMAND_LINE: 1713 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; 1714 break; 1715 case Flag::ENVIRON_VAR: 1716 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; 1717 break; 1718 case Flag::CONFIG_FILE: 1719 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; 1720 break; 1721 case Flag::MANAGEMENT: 1722 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; 1723 break; 1724 case Flag::ERGONOMIC: 1725 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; 1726 break; 1727 default: 1728 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; 1729 } 1730 1731 return true; 1732 } 1733 1734 // Fill globals array of count length with jmmVMGlobal entries 1735 // specified by names. If names == NULL, fill globals array 1736 // with all Flags. Return value is number of entries 1737 // created in globals. 1738 // If a Flag with a given name in an array element does not 1739 // exist, globals[i].name will be set to NULL. 1740 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, 1741 jobjectArray names, 1742 jmmVMGlobal *globals, 1743 jint count)) 1744 1745 1746 if (globals == NULL) { 1747 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1748 } 1749 1750 ResourceMark rm(THREAD); 1751 1752 if (names != NULL) { 1753 // return the requested globals 1754 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); 1755 objArrayHandle names_ah(THREAD, ta); 1756 // Make sure we have a String array 1757 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1758 if (element_klass != SystemDictionary::String_klass()) { 1759 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1760 "Array element type is not String class", 0); 1761 } 1762 1763 int names_length = names_ah->length(); 1764 int num_entries = 0; 1765 for (int i = 0; i < names_length && i < count; i++) { 1766 oop s = names_ah->obj_at(i); 1767 if (s == NULL) { 1768 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1769 } 1770 1771 Handle sh(THREAD, s); 1772 char* str = java_lang_String::as_utf8_string(s); 1773 Flag* flag = Flag::find_flag(str, strlen(str)); 1774 if (flag != NULL && 1775 add_global_entry(env, sh, &globals[i], flag, THREAD)) { 1776 num_entries++; 1777 } else { 1778 globals[i].name = NULL; 1779 } 1780 } 1781 return num_entries; 1782 } else { 1783 // return all globals if names == NULL 1784 1785 // last flag entry is always NULL, so subtract 1 1786 int nFlags = (int) Flag::numFlags - 1; 1787 Handle null_h; 1788 int num_entries = 0; 1789 for (int i = 0; i < nFlags && num_entries < count; i++) { 1790 Flag* flag = &Flag::flags[i]; 1791 // Exclude notproduct and develop flags in product builds. 1792 if (flag->is_constant_in_binary()) { 1793 continue; 1794 } 1795 // Exclude the locked (diagnostic, experimental) flags 1796 if ((flag->is_unlocked() || flag->is_unlocker()) && 1797 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { 1798 num_entries++; 1799 } 1800 } 1801 return num_entries; 1802 } 1803 JVM_END 1804 1805 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) 1806 ResourceMark rm(THREAD); 1807 1808 oop fn = JNIHandles::resolve_external_guard(flag_name); 1809 if (fn == NULL) { 1810 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 1811 "The flag name cannot be null."); 1812 } 1813 char* name = java_lang_String::as_utf8_string(fn); 1814 Flag* flag = Flag::find_flag(name, strlen(name)); 1815 if (flag == NULL) { 1816 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1817 "Flag does not exist."); 1818 } 1819 if (!flag->is_writeable()) { 1820 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1821 "This flag is not writeable."); 1822 } 1823 1824 bool succeed; 1825 if (flag->is_bool()) { 1826 bool bvalue = (new_value.z == JNI_TRUE ? true : false); 1827 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT); 1828 } else if (flag->is_intx()) { 1829 intx ivalue = (intx)new_value.j; 1830 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT); 1831 } else if (flag->is_uintx()) { 1832 uintx uvalue = (uintx)new_value.j; 1833 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT); 1834 } else if (flag->is_uint64_t()) { 1835 uint64_t uvalue = (uint64_t)new_value.j; 1836 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT); 1837 } else if (flag->is_ccstr()) { 1838 oop str = JNIHandles::resolve_external_guard(new_value.l); 1839 if (str == NULL) { 1840 THROW(vmSymbols::java_lang_NullPointerException()); 1841 } 1842 ccstr svalue = java_lang_String::as_utf8_string(str); 1843 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT); 1844 } 1845 assert(succeed, "Setting flag should succeed"); 1846 JVM_END 1847 1848 class ThreadTimesClosure: public ThreadClosure { 1849 private: 1850 objArrayHandle _names_strings; 1851 char **_names_chars; 1852 typeArrayHandle _times; 1853 int _names_len; 1854 int _times_len; 1855 int _count; 1856 1857 public: 1858 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times); 1859 ~ThreadTimesClosure(); 1860 virtual void do_thread(Thread* thread); 1861 void do_unlocked(); 1862 int count() { return _count; } 1863 }; 1864 1865 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, 1866 typeArrayHandle times) { 1867 assert(names() != NULL, "names was NULL"); 1868 assert(times() != NULL, "times was NULL"); 1869 _names_strings = names; 1870 _names_len = names->length(); 1871 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); 1872 _times = times; 1873 _times_len = times->length(); 1874 _count = 0; 1875 } 1876 1877 // 1878 // Called with Threads_lock held 1879 // 1880 void ThreadTimesClosure::do_thread(Thread* thread) { 1881 assert(thread != NULL, "thread was NULL"); 1882 1883 // exclude externally visible JavaThreads 1884 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 1885 return; 1886 } 1887 1888 if (_count >= _names_len || _count >= _times_len) { 1889 // skip if the result array is not big enough 1890 return; 1891 } 1892 1893 EXCEPTION_MARK; 1894 ResourceMark rm(THREAD); // thread->name() uses ResourceArea 1895 1896 assert(thread->name() != NULL, "All threads should have a name"); 1897 _names_chars[_count] = strdup(thread->name()); 1898 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? 1899 os::thread_cpu_time(thread) : -1); 1900 _count++; 1901 } 1902 1903 // Called without Threads_lock, we can allocate String objects. 1904 void ThreadTimesClosure::do_unlocked() { 1905 1906 EXCEPTION_MARK; 1907 for (int i = 0; i < _count; i++) { 1908 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); 1909 _names_strings->obj_at_put(i, s()); 1910 } 1911 } 1912 1913 ThreadTimesClosure::~ThreadTimesClosure() { 1914 for (int i = 0; i < _count; i++) { 1915 free(_names_chars[i]); 1916 } 1917 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal); 1918 } 1919 1920 // Fills names with VM internal thread names and times with the corresponding 1921 // CPU times. If names or times is NULL, a NullPointerException is thrown. 1922 // If the element type of names is not String, an IllegalArgumentException is 1923 // thrown. 1924 // If an array is not large enough to hold all the entries, only the entries 1925 // that fit will be returned. Return value is the number of VM internal 1926 // threads entries. 1927 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, 1928 jobjectArray names, 1929 jlongArray times)) 1930 if (names == NULL || times == NULL) { 1931 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1932 } 1933 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); 1934 objArrayHandle names_ah(THREAD, na); 1935 1936 // Make sure we have a String array 1937 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1938 if (element_klass != SystemDictionary::String_klass()) { 1939 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1940 "Array element type is not String class", 0); 1941 } 1942 1943 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); 1944 typeArrayHandle times_ah(THREAD, ta); 1945 1946 ThreadTimesClosure ttc(names_ah, times_ah); 1947 { 1948 MutexLockerEx ml(Threads_lock); 1949 Threads::threads_do(&ttc); 1950 } 1951 ttc.do_unlocked(); 1952 return ttc.count(); 1953 JVM_END 1954 1955 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { 1956 ResourceMark rm(THREAD); 1957 1958 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); 1959 VMThread::execute(&op); 1960 1961 DeadlockCycle* deadlocks = op.result(); 1962 if (deadlocks == NULL) { 1963 // no deadlock found and return 1964 return Handle(); 1965 } 1966 1967 int num_threads = 0; 1968 DeadlockCycle* cycle; 1969 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1970 num_threads += cycle->num_threads(); 1971 } 1972 1973 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); 1974 objArrayHandle threads_ah(THREAD, r); 1975 1976 int index = 0; 1977 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1978 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); 1979 int len = deadlock_threads->length(); 1980 for (int i = 0; i < len; i++) { 1981 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); 1982 index++; 1983 } 1984 } 1985 return threads_ah; 1986 } 1987 1988 // Finds cycles of threads that are deadlocked involved in object monitors 1989 // and JSR-166 synchronizers. 1990 // Returns an array of Thread objects which are in deadlock, if any. 1991 // Otherwise, returns NULL. 1992 // 1993 // Input parameter: 1994 // object_monitors_only - if true, only check object monitors 1995 // 1996 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) 1997 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); 1998 return (jobjectArray) JNIHandles::make_local(env, result()); 1999 JVM_END 2000 2001 // Finds cycles of threads that are deadlocked on monitor locks 2002 // Returns an array of Thread objects which are in deadlock, if any. 2003 // Otherwise, returns NULL. 2004 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) 2005 Handle result = find_deadlocks(true, CHECK_0); 2006 return (jobjectArray) JNIHandles::make_local(env, result()); 2007 JVM_END 2008 2009 // Gets the information about GC extension attributes including 2010 // the name of the attribute, its type, and a short description. 2011 // 2012 // Input parameters: 2013 // mgr - GC memory manager 2014 // info - caller allocated array of jmmExtAttributeInfo 2015 // count - number of elements of the info array 2016 // 2017 // Returns the number of GC extension attributes filled in the info array; or 2018 // -1 if info is not big enough 2019 // 2020 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) 2021 // All GC memory managers have 1 attribute (number of GC threads) 2022 if (count == 0) { 2023 return 0; 2024 } 2025 2026 if (info == NULL) { 2027 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2028 } 2029 2030 info[0].name = "GcThreadCount"; 2031 info[0].type = 'I'; 2032 info[0].description = "Number of GC threads"; 2033 return 1; 2034 JVM_END 2035 2036 // verify the given array is an array of java/lang/management/MemoryUsage objects 2037 // of a given length and return the objArrayOop 2038 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { 2039 if (array == NULL) { 2040 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2041 } 2042 2043 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); 2044 objArrayHandle array_h(THREAD, oa); 2045 2046 // array must be of the given length 2047 if (length != array_h->length()) { 2048 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2049 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); 2050 } 2051 2052 // check if the element of array is of type MemoryUsage class 2053 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); 2054 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass(); 2055 if (element_klass != usage_klass) { 2056 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2057 "The element type is not MemoryUsage class", 0); 2058 } 2059 2060 return array_h(); 2061 } 2062 2063 // Gets the statistics of the last GC of a given GC memory manager. 2064 // Input parameters: 2065 // obj - GarbageCollectorMXBean object 2066 // gc_stat - caller allocated jmmGCStat where: 2067 // a. before_gc_usage - array of MemoryUsage objects 2068 // b. after_gc_usage - array of MemoryUsage objects 2069 // c. gc_ext_attributes_values_size is set to the 2070 // gc_ext_attribute_values array allocated 2071 // d. gc_ext_attribute_values is a caller allocated array of jvalue. 2072 // 2073 // On return, 2074 // gc_index == 0 indicates no GC statistics available 2075 // 2076 // before_gc_usage and after_gc_usage - filled with per memory pool 2077 // before and after GC usage in the same order as the memory pools 2078 // returned by GetMemoryPools for a given GC memory manager. 2079 // num_gc_ext_attributes indicates the number of elements in 2080 // the gc_ext_attribute_values array is filled; or 2081 // -1 if the gc_ext_attributes_values array is not big enough 2082 // 2083 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) 2084 ResourceMark rm(THREAD); 2085 2086 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { 2087 THROW(vmSymbols::java_lang_NullPointerException()); 2088 } 2089 2090 // Get the GCMemoryManager 2091 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2092 2093 // Make a copy of the last GC statistics 2094 // GC may occur while constructing the last GC information 2095 int num_pools = MemoryService::num_memory_pools(); 2096 GCStatInfo stat(num_pools); 2097 if (mgr->get_last_gc_stat(&stat) == 0) { 2098 gc_stat->gc_index = 0; 2099 return; 2100 } 2101 2102 gc_stat->gc_index = stat.gc_index(); 2103 gc_stat->start_time = Management::ticks_to_ms(stat.start_time()); 2104 gc_stat->end_time = Management::ticks_to_ms(stat.end_time()); 2105 2106 // Current implementation does not have GC extension attributes 2107 gc_stat->num_gc_ext_attributes = 0; 2108 2109 // Fill the arrays of MemoryUsage objects with before and after GC 2110 // per pool memory usage 2111 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, 2112 num_pools, 2113 CHECK); 2114 objArrayHandle usage_before_gc_ah(THREAD, bu); 2115 2116 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, 2117 num_pools, 2118 CHECK); 2119 objArrayHandle usage_after_gc_ah(THREAD, au); 2120 2121 for (int i = 0; i < num_pools; i++) { 2122 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK); 2123 Handle after_usage; 2124 2125 MemoryUsage u = stat.after_gc_usage_for_pool(i); 2126 if (u.max_size() == 0 && u.used() > 0) { 2127 // If max size == 0, this pool is a survivor space. 2128 // Set max size = -1 since the pools will be swapped after GC. 2129 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); 2130 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); 2131 } else { 2132 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK); 2133 } 2134 usage_before_gc_ah->obj_at_put(i, before_usage()); 2135 usage_after_gc_ah->obj_at_put(i, after_usage()); 2136 } 2137 2138 if (gc_stat->gc_ext_attribute_values_size > 0) { 2139 // Current implementation only has 1 attribute (number of GC threads) 2140 // The type is 'I' 2141 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); 2142 } 2143 JVM_END 2144 2145 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) 2146 ResourceMark rm(THREAD); 2147 // Get the GCMemoryManager 2148 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2149 mgr->set_notification_enabled(enabled?true:false); 2150 JVM_END 2151 2152 // Dump heap - Returns 0 if succeeds. 2153 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) 2154 #if INCLUDE_SERVICES 2155 ResourceMark rm(THREAD); 2156 oop on = JNIHandles::resolve_external_guard(outputfile); 2157 if (on == NULL) { 2158 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2159 "Output file name cannot be null.", -1); 2160 } 2161 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1)); 2162 if (name == NULL) { 2163 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2164 "Output file name cannot be null.", -1); 2165 } 2166 HeapDumper dumper(live ? true : false); 2167 if (dumper.dump(name) != 0) { 2168 const char* errmsg = dumper.error_as_C_string(); 2169 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); 2170 } 2171 return 0; 2172 #else // INCLUDE_SERVICES 2173 return -1; 2174 #endif // INCLUDE_SERVICES 2175 JVM_END 2176 2177 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) 2178 ResourceMark rm(THREAD); 2179 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean); 2180 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), 2181 dcmd_list->length(), CHECK_NULL); 2182 objArrayHandle cmd_array(THREAD, cmd_array_oop); 2183 for (int i = 0; i < dcmd_list->length(); i++) { 2184 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); 2185 cmd_array->obj_at_put(i, cmd_name); 2186 } 2187 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); 2188 JVM_END 2189 2190 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, 2191 dcmdInfo* infoArray)) 2192 if (cmds == NULL || infoArray == NULL) { 2193 THROW(vmSymbols::java_lang_NullPointerException()); 2194 } 2195 2196 ResourceMark rm(THREAD); 2197 2198 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); 2199 objArrayHandle cmds_ah(THREAD, ca); 2200 2201 // Make sure we have a String array 2202 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass(); 2203 if (element_klass != SystemDictionary::String_klass()) { 2204 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2205 "Array element type is not String class"); 2206 } 2207 2208 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean); 2209 2210 int num_cmds = cmds_ah->length(); 2211 for (int i = 0; i < num_cmds; i++) { 2212 oop cmd = cmds_ah->obj_at(i); 2213 if (cmd == NULL) { 2214 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2215 "Command name cannot be null."); 2216 } 2217 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2218 if (cmd_name == NULL) { 2219 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2220 "Command name cannot be null."); 2221 } 2222 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); 2223 if (pos == -1) { 2224 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2225 "Unknown diagnostic command"); 2226 } 2227 DCmdInfo* info = info_list->at(pos); 2228 infoArray[i].name = info->name(); 2229 infoArray[i].description = info->description(); 2230 infoArray[i].impact = info->impact(); 2231 JavaPermission p = info->permission(); 2232 infoArray[i].permission_class = p._class; 2233 infoArray[i].permission_name = p._name; 2234 infoArray[i].permission_action = p._action; 2235 infoArray[i].num_arguments = info->num_arguments(); 2236 infoArray[i].enabled = info->is_enabled(); 2237 } 2238 JVM_END 2239 2240 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, 2241 jstring command, dcmdArgInfo* infoArray)) 2242 ResourceMark rm(THREAD); 2243 oop cmd = JNIHandles::resolve_external_guard(command); 2244 if (cmd == NULL) { 2245 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2246 "Command line cannot be null."); 2247 } 2248 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2249 if (cmd_name == NULL) { 2250 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2251 "Command line content cannot be null."); 2252 } 2253 DCmd* dcmd = NULL; 2254 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name, 2255 strlen(cmd_name)); 2256 if (factory != NULL) { 2257 dcmd = factory->create_resource_instance(NULL); 2258 } 2259 if (dcmd == NULL) { 2260 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2261 "Unknown diagnostic command"); 2262 } 2263 DCmdMark mark(dcmd); 2264 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); 2265 if (array->length() == 0) { 2266 return; 2267 } 2268 for (int i = 0; i < array->length(); i++) { 2269 infoArray[i].name = array->at(i)->name(); 2270 infoArray[i].description = array->at(i)->description(); 2271 infoArray[i].type = array->at(i)->type(); 2272 infoArray[i].default_string = array->at(i)->default_string(); 2273 infoArray[i].mandatory = array->at(i)->is_mandatory(); 2274 infoArray[i].option = array->at(i)->is_option(); 2275 infoArray[i].multiple = array->at(i)->is_multiple(); 2276 infoArray[i].position = array->at(i)->position(); 2277 } 2278 return; 2279 JVM_END 2280 2281 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) 2282 ResourceMark rm(THREAD); 2283 oop cmd = JNIHandles::resolve_external_guard(commandline); 2284 if (cmd == NULL) { 2285 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2286 "Command line cannot be null."); 2287 } 2288 char* cmdline = java_lang_String::as_utf8_string(cmd); 2289 if (cmdline == NULL) { 2290 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2291 "Command line content cannot be null."); 2292 } 2293 bufferedStream output; 2294 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL); 2295 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); 2296 return (jstring) JNIHandles::make_local(env, result); 2297 JVM_END 2298 2299 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled)) 2300 DCmdFactory::set_jmx_notification_enabled(enabled?true:false); 2301 JVM_END 2302 2303 jlong Management::ticks_to_ms(jlong ticks) { 2304 assert(os::elapsed_frequency() > 0, "Must be non-zero"); 2305 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) 2306 * (double)1000.0); 2307 } 2308 2309 const struct jmmInterface_1_ jmm_interface = { 2310 NULL, 2311 NULL, 2312 jmm_GetVersion, 2313 jmm_GetOptionalSupport, 2314 jmm_GetInputArguments, 2315 jmm_GetThreadInfo, 2316 jmm_GetInputArgumentArray, 2317 jmm_GetMemoryPools, 2318 jmm_GetMemoryManagers, 2319 jmm_GetMemoryPoolUsage, 2320 jmm_GetPeakMemoryPoolUsage, 2321 jmm_GetThreadAllocatedMemory, 2322 jmm_GetMemoryUsage, 2323 jmm_GetLongAttribute, 2324 jmm_GetBoolAttribute, 2325 jmm_SetBoolAttribute, 2326 jmm_GetLongAttributes, 2327 jmm_FindMonitorDeadlockedThreads, 2328 jmm_GetThreadCpuTime, 2329 jmm_GetVMGlobalNames, 2330 jmm_GetVMGlobals, 2331 jmm_GetInternalThreadTimes, 2332 jmm_ResetStatistic, 2333 jmm_SetPoolSensor, 2334 jmm_SetPoolThreshold, 2335 jmm_GetPoolCollectionUsage, 2336 jmm_GetGCExtAttributeInfo, 2337 jmm_GetLastGCStat, 2338 jmm_GetThreadCpuTimeWithKind, 2339 jmm_GetThreadCpuTimesWithKind, 2340 jmm_DumpHeap0, 2341 jmm_FindDeadlockedThreads, 2342 jmm_SetVMGlobal, 2343 NULL, 2344 jmm_DumpThreads, 2345 jmm_SetGCNotificationEnabled, 2346 jmm_GetDiagnosticCommands, 2347 jmm_GetDiagnosticCommandInfo, 2348 jmm_GetDiagnosticCommandArgumentsInfo, 2349 jmm_ExecuteDiagnosticCommand, 2350 jmm_SetDiagnosticFrameworkNotificationEnabled 2351 }; 2352 #endif // INCLUDE_MANAGEMENT 2353 2354 void* Management::get_jmm_interface(int version) { 2355 #if INCLUDE_MANAGEMENT 2356 if (version == JMM_VERSION_1_0) { 2357 return (void*) &jmm_interface; 2358 } 2359 #endif // INCLUDE_MANAGEMENT 2360 return NULL; 2361 }