management.cpp revision 6412:53a41e7cbe05
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// Helper functions 396static JavaThread* find_java_thread_from_id(jlong thread_id) { 397 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); 398 399 JavaThread* java_thread = NULL; 400 // Sequential search for now. Need to do better optimization later. 401 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { 402 oop tobj = thread->threadObj(); 403 if (!thread->is_exiting() && 404 tobj != NULL && 405 thread_id == java_lang_Thread::thread_id(tobj)) { 406 java_thread = thread; 407 break; 408 } 409 } 410 return java_thread; 411} 412 413static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { 414 if (mgr == NULL) { 415 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 416 } 417 oop mgr_obj = JNIHandles::resolve(mgr); 418 instanceHandle h(THREAD, (instanceOop) mgr_obj); 419 420 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); 421 if (!h->is_a(k)) { 422 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 423 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", 424 NULL); 425 } 426 427 MemoryManager* gc = MemoryService::get_memory_manager(h); 428 if (gc == NULL || !gc->is_gc_memory_manager()) { 429 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 430 "Invalid GC memory manager", 431 NULL); 432 } 433 return (GCMemoryManager*) gc; 434} 435 436static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { 437 if (obj == NULL) { 438 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 439 } 440 441 oop pool_obj = JNIHandles::resolve(obj); 442 assert(pool_obj->is_instance(), "Should be an instanceOop"); 443 instanceHandle ph(THREAD, (instanceOop) pool_obj); 444 445 return MemoryService::get_memory_pool(ph); 446} 447 448static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { 449 int num_threads = ids_ah->length(); 450 451 // Validate input thread IDs 452 int i = 0; 453 for (i = 0; i < num_threads; i++) { 454 jlong tid = ids_ah->long_at(i); 455 if (tid <= 0) { 456 // throw exception if invalid thread id. 457 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 458 "Invalid thread ID entry"); 459 } 460 } 461} 462 463static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { 464 // check if the element of infoArray is of type ThreadInfo class 465 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); 466 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass(); 467 if (element_klass != threadinfo_klass) { 468 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 469 "infoArray element type is not ThreadInfo class"); 470 } 471} 472 473 474static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { 475 if (obj == NULL) { 476 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 477 } 478 479 oop mgr_obj = JNIHandles::resolve(obj); 480 assert(mgr_obj->is_instance(), "Should be an instanceOop"); 481 instanceHandle mh(THREAD, (instanceOop) mgr_obj); 482 483 return MemoryService::get_memory_manager(mh); 484} 485 486// Returns a version string and sets major and minor version if 487// the input parameters are non-null. 488JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) 489 return JMM_VERSION; 490JVM_END 491 492// Gets the list of VM monitoring and management optional supports 493// Returns 0 if succeeded; otherwise returns non-zero. 494JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) 495 if (support == NULL) { 496 return -1; 497 } 498 Management::get_optional_support(support); 499 return 0; 500JVM_END 501 502// Returns a java.lang.String object containing the input arguments to the VM. 503JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) 504 ResourceMark rm(THREAD); 505 506 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 507 return NULL; 508 } 509 510 char** vm_flags = Arguments::jvm_flags_array(); 511 char** vm_args = Arguments::jvm_args_array(); 512 int num_flags = Arguments::num_jvm_flags(); 513 int num_args = Arguments::num_jvm_args(); 514 515 size_t length = 1; // null terminator 516 int i; 517 for (i = 0; i < num_flags; i++) { 518 length += strlen(vm_flags[i]); 519 } 520 for (i = 0; i < num_args; i++) { 521 length += strlen(vm_args[i]); 522 } 523 // add a space between each argument 524 length += num_flags + num_args - 1; 525 526 // Return the list of input arguments passed to the VM 527 // and preserve the order that the VM processes. 528 char* args = NEW_RESOURCE_ARRAY(char, length); 529 args[0] = '\0'; 530 // concatenate all jvm_flags 531 if (num_flags > 0) { 532 strcat(args, vm_flags[0]); 533 for (i = 1; i < num_flags; i++) { 534 strcat(args, " "); 535 strcat(args, vm_flags[i]); 536 } 537 } 538 539 if (num_args > 0 && num_flags > 0) { 540 // append a space if args already contains one or more jvm_flags 541 strcat(args, " "); 542 } 543 544 // concatenate all jvm_args 545 if (num_args > 0) { 546 strcat(args, vm_args[0]); 547 for (i = 1; i < num_args; i++) { 548 strcat(args, " "); 549 strcat(args, vm_args[i]); 550 } 551 } 552 553 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); 554 return JNIHandles::make_local(env, hargs()); 555JVM_END 556 557// Returns an array of java.lang.String object containing the input arguments to the VM. 558JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) 559 ResourceMark rm(THREAD); 560 561 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 562 return NULL; 563 } 564 565 char** vm_flags = Arguments::jvm_flags_array(); 566 char** vm_args = Arguments::jvm_args_array(); 567 int num_flags = Arguments::num_jvm_flags(); 568 int num_args = Arguments::num_jvm_args(); 569 570 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); 571 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); 572 objArrayHandle result_h(THREAD, r); 573 574 int index = 0; 575 for (int j = 0; j < num_flags; j++, index++) { 576 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 577 result_h->obj_at_put(index, h()); 578 } 579 for (int i = 0; i < num_args; i++, index++) { 580 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 581 result_h->obj_at_put(index, h()); 582 } 583 return (jobjectArray) JNIHandles::make_local(env, result_h()); 584JVM_END 585 586// Returns an array of java/lang/management/MemoryPoolMXBean object 587// one for each memory pool if obj == null; otherwise returns 588// an array of memory pools for a given memory manager if 589// it is a valid memory manager. 590JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) 591 ResourceMark rm(THREAD); 592 593 int num_memory_pools; 594 MemoryManager* mgr = NULL; 595 if (obj == NULL) { 596 num_memory_pools = MemoryService::num_memory_pools(); 597 } else { 598 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); 599 if (mgr == NULL) { 600 return NULL; 601 } 602 num_memory_pools = mgr->num_memory_pools(); 603 } 604 605 // Allocate the resulting MemoryPoolMXBean[] object 606 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); 607 instanceKlassHandle ik (THREAD, k); 608 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); 609 objArrayHandle poolArray(THREAD, r); 610 611 if (mgr == NULL) { 612 // Get all memory pools 613 for (int i = 0; i < num_memory_pools; i++) { 614 MemoryPool* pool = MemoryService::get_memory_pool(i); 615 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 616 instanceHandle ph(THREAD, p); 617 poolArray->obj_at_put(i, ph()); 618 } 619 } else { 620 // Get memory pools managed by a given memory manager 621 for (int i = 0; i < num_memory_pools; i++) { 622 MemoryPool* pool = mgr->get_memory_pool(i); 623 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 624 instanceHandle ph(THREAD, p); 625 poolArray->obj_at_put(i, ph()); 626 } 627 } 628 return (jobjectArray) JNIHandles::make_local(env, poolArray()); 629JVM_END 630 631// Returns an array of java/lang/management/MemoryManagerMXBean object 632// one for each memory manager if obj == null; otherwise returns 633// an array of memory managers for a given memory pool if 634// it is a valid memory pool. 635JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) 636 ResourceMark rm(THREAD); 637 638 int num_mgrs; 639 MemoryPool* pool = NULL; 640 if (obj == NULL) { 641 num_mgrs = MemoryService::num_memory_managers(); 642 } else { 643 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 644 if (pool == NULL) { 645 return NULL; 646 } 647 num_mgrs = pool->num_memory_managers(); 648 } 649 650 // Allocate the resulting MemoryManagerMXBean[] object 651 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); 652 instanceKlassHandle ik (THREAD, k); 653 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); 654 objArrayHandle mgrArray(THREAD, r); 655 656 if (pool == NULL) { 657 // Get all memory managers 658 for (int i = 0; i < num_mgrs; i++) { 659 MemoryManager* mgr = MemoryService::get_memory_manager(i); 660 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 661 instanceHandle ph(THREAD, p); 662 mgrArray->obj_at_put(i, ph()); 663 } 664 } else { 665 // Get memory managers for a given memory pool 666 for (int i = 0; i < num_mgrs; i++) { 667 MemoryManager* mgr = pool->get_memory_manager(i); 668 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 669 instanceHandle ph(THREAD, p); 670 mgrArray->obj_at_put(i, ph()); 671 } 672 } 673 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); 674JVM_END 675 676 677// Returns a java/lang/management/MemoryUsage object containing the memory usage 678// of a given memory pool. 679JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) 680 ResourceMark rm(THREAD); 681 682 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 683 if (pool != NULL) { 684 MemoryUsage usage = pool->get_memory_usage(); 685 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 686 return JNIHandles::make_local(env, h()); 687 } else { 688 return NULL; 689 } 690JVM_END 691 692// Returns a java/lang/management/MemoryUsage object containing the memory usage 693// of a given memory pool. 694JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) 695 ResourceMark rm(THREAD); 696 697 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 698 if (pool != NULL) { 699 MemoryUsage usage = pool->get_peak_memory_usage(); 700 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 701 return JNIHandles::make_local(env, h()); 702 } else { 703 return NULL; 704 } 705JVM_END 706 707// Returns a java/lang/management/MemoryUsage object containing the memory usage 708// of a given memory pool after most recent GC. 709JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) 710 ResourceMark rm(THREAD); 711 712 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 713 if (pool != NULL && pool->is_collected_pool()) { 714 MemoryUsage usage = pool->get_last_collection_usage(); 715 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 716 return JNIHandles::make_local(env, h()); 717 } else { 718 return NULL; 719 } 720JVM_END 721 722// Sets the memory pool sensor for a threshold type 723JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) 724 if (obj == NULL || sensorObj == NULL) { 725 THROW(vmSymbols::java_lang_NullPointerException()); 726 } 727 728 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK); 729 oop s = JNIHandles::resolve(sensorObj); 730 assert(s->is_instance(), "Sensor should be an instanceOop"); 731 instanceHandle sensor_h(THREAD, (instanceOop) s); 732 if (!sensor_h->is_a(sensor_klass)) { 733 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 734 "Sensor is not an instance of sun.management.Sensor class"); 735 } 736 737 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); 738 assert(mpool != NULL, "MemoryPool should exist"); 739 740 switch (type) { 741 case JMM_USAGE_THRESHOLD_HIGH: 742 case JMM_USAGE_THRESHOLD_LOW: 743 // have only one sensor for threshold high and low 744 mpool->set_usage_sensor_obj(sensor_h); 745 break; 746 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 747 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 748 // have only one sensor for threshold high and low 749 mpool->set_gc_usage_sensor_obj(sensor_h); 750 break; 751 default: 752 assert(false, "Unrecognized type"); 753 } 754 755JVM_END 756 757 758// Sets the threshold of a given memory pool. 759// Returns the previous threshold. 760// 761// Input parameters: 762// pool - the MemoryPoolMXBean object 763// type - threshold type 764// threshold - the new threshold (must not be negative) 765// 766JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) 767 if (threshold < 0) { 768 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 769 "Invalid threshold value", 770 -1); 771 } 772 773 if ((size_t)threshold > max_uintx) { 774 stringStream st; 775 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); 776 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); 777 } 778 779 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); 780 assert(pool != NULL, "MemoryPool should exist"); 781 782 jlong prev = 0; 783 switch (type) { 784 case JMM_USAGE_THRESHOLD_HIGH: 785 if (!pool->usage_threshold()->is_high_threshold_supported()) { 786 return -1; 787 } 788 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); 789 break; 790 791 case JMM_USAGE_THRESHOLD_LOW: 792 if (!pool->usage_threshold()->is_low_threshold_supported()) { 793 return -1; 794 } 795 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); 796 break; 797 798 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 799 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { 800 return -1; 801 } 802 // return and the new threshold is effective for the next GC 803 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); 804 805 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 806 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { 807 return -1; 808 } 809 // return and the new threshold is effective for the next GC 810 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); 811 812 default: 813 assert(false, "Unrecognized type"); 814 return -1; 815 } 816 817 // When the threshold is changed, reevaluate if the low memory 818 // detection is enabled. 819 if (prev != threshold) { 820 LowMemoryDetector::recompute_enabled_for_collected_pools(); 821 LowMemoryDetector::detect_low_memory(pool); 822 } 823 return prev; 824JVM_END 825 826// Gets an array containing the amount of memory allocated on the Java 827// heap for a set of threads (in bytes). Each element of the array is 828// the amount of memory allocated for the thread ID specified in the 829// corresponding entry in the given array of thread IDs; or -1 if the 830// thread does not exist or has terminated. 831JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, 832 jlongArray sizeArray)) 833 // Check if threads is null 834 if (ids == NULL || sizeArray == NULL) { 835 THROW(vmSymbols::java_lang_NullPointerException()); 836 } 837 838 ResourceMark rm(THREAD); 839 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 840 typeArrayHandle ids_ah(THREAD, ta); 841 842 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); 843 typeArrayHandle sizeArray_h(THREAD, sa); 844 845 // validate the thread id array 846 validate_thread_id_array(ids_ah, CHECK); 847 848 // sizeArray must be of the same length as the given array of thread IDs 849 int num_threads = ids_ah->length(); 850 if (num_threads != sizeArray_h->length()) { 851 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 852 "The length of the given long array does not match the length of " 853 "the given array of thread IDs"); 854 } 855 856 MutexLockerEx ml(Threads_lock); 857 for (int i = 0; i < num_threads; i++) { 858 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 859 if (java_thread != NULL) { 860 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); 861 } 862 } 863JVM_END 864 865// Returns a java/lang/management/MemoryUsage object representing 866// the memory usage for the heap or non-heap memory. 867JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) 868 ResourceMark rm(THREAD); 869 870 // Calculate the memory usage 871 size_t total_init = 0; 872 size_t total_used = 0; 873 size_t total_committed = 0; 874 size_t total_max = 0; 875 bool has_undefined_init_size = false; 876 bool has_undefined_max_size = false; 877 878 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 879 MemoryPool* pool = MemoryService::get_memory_pool(i); 880 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { 881 MemoryUsage u = pool->get_memory_usage(); 882 total_used += u.used(); 883 total_committed += u.committed(); 884 885 if (u.init_size() == (size_t)-1) { 886 has_undefined_init_size = true; 887 } 888 if (!has_undefined_init_size) { 889 total_init += u.init_size(); 890 } 891 892 if (u.max_size() == (size_t)-1) { 893 has_undefined_max_size = true; 894 } 895 if (!has_undefined_max_size) { 896 total_max += u.max_size(); 897 } 898 } 899 } 900 901 // if any one of the memory pool has undefined init_size or max_size, 902 // set it to -1 903 if (has_undefined_init_size) { 904 total_init = (size_t)-1; 905 } 906 if (has_undefined_max_size) { 907 total_max = (size_t)-1; 908 } 909 910 MemoryUsage usage((heap ? InitialHeapSize : total_init), 911 total_used, 912 total_committed, 913 (heap ? Universe::heap()->max_capacity() : total_max)); 914 915 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 916 return JNIHandles::make_local(env, obj()); 917JVM_END 918 919// Returns the boolean value of a given attribute. 920JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) 921 switch (att) { 922 case JMM_VERBOSE_GC: 923 return MemoryService::get_verbose(); 924 case JMM_VERBOSE_CLASS: 925 return ClassLoadingService::get_verbose(); 926 case JMM_THREAD_CONTENTION_MONITORING: 927 return ThreadService::is_thread_monitoring_contention(); 928 case JMM_THREAD_CPU_TIME: 929 return ThreadService::is_thread_cpu_time_enabled(); 930 case JMM_THREAD_ALLOCATED_MEMORY: 931 return ThreadService::is_thread_allocated_memory_enabled(); 932 default: 933 assert(0, "Unrecognized attribute"); 934 return false; 935 } 936JVM_END 937 938// Sets the given boolean attribute and returns the previous value. 939JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) 940 switch (att) { 941 case JMM_VERBOSE_GC: 942 return MemoryService::set_verbose(flag != 0); 943 case JMM_VERBOSE_CLASS: 944 return ClassLoadingService::set_verbose(flag != 0); 945 case JMM_THREAD_CONTENTION_MONITORING: 946 return ThreadService::set_thread_monitoring_contention(flag != 0); 947 case JMM_THREAD_CPU_TIME: 948 return ThreadService::set_thread_cpu_time_enabled(flag != 0); 949 case JMM_THREAD_ALLOCATED_MEMORY: 950 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); 951 default: 952 assert(0, "Unrecognized attribute"); 953 return false; 954 } 955JVM_END 956 957 958static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { 959 switch (att) { 960 case JMM_GC_TIME_MS: 961 return mgr->gc_time_ms(); 962 963 case JMM_GC_COUNT: 964 return mgr->gc_count(); 965 966 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: 967 // current implementation only has 1 ext attribute 968 return 1; 969 970 default: 971 assert(0, "Unrecognized GC attribute"); 972 return -1; 973 } 974} 975 976class VmThreadCountClosure: public ThreadClosure { 977 private: 978 int _count; 979 public: 980 VmThreadCountClosure() : _count(0) {}; 981 void do_thread(Thread* thread); 982 int count() { return _count; } 983}; 984 985void VmThreadCountClosure::do_thread(Thread* thread) { 986 // exclude externally visible JavaThreads 987 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 988 return; 989 } 990 991 _count++; 992} 993 994static jint get_vm_thread_count() { 995 VmThreadCountClosure vmtcc; 996 { 997 MutexLockerEx ml(Threads_lock); 998 Threads::threads_do(&vmtcc); 999 } 1000 1001 return vmtcc.count(); 1002} 1003 1004static jint get_num_flags() { 1005 // last flag entry is always NULL, so subtract 1 1006 int nFlags = (int) Flag::numFlags - 1; 1007 int count = 0; 1008 for (int i = 0; i < nFlags; i++) { 1009 Flag* flag = &Flag::flags[i]; 1010 // Exclude the locked (diagnostic, experimental) flags 1011 if (flag->is_unlocked() || flag->is_unlocker()) { 1012 count++; 1013 } 1014 } 1015 return count; 1016} 1017 1018static jlong get_long_attribute(jmmLongAttribute att) { 1019 switch (att) { 1020 case JMM_CLASS_LOADED_COUNT: 1021 return ClassLoadingService::loaded_class_count(); 1022 1023 case JMM_CLASS_UNLOADED_COUNT: 1024 return ClassLoadingService::unloaded_class_count(); 1025 1026 case JMM_THREAD_TOTAL_COUNT: 1027 return ThreadService::get_total_thread_count(); 1028 1029 case JMM_THREAD_LIVE_COUNT: 1030 return ThreadService::get_live_thread_count(); 1031 1032 case JMM_THREAD_PEAK_COUNT: 1033 return ThreadService::get_peak_thread_count(); 1034 1035 case JMM_THREAD_DAEMON_COUNT: 1036 return ThreadService::get_daemon_thread_count(); 1037 1038 case JMM_JVM_INIT_DONE_TIME_MS: 1039 return Management::vm_init_done_time(); 1040 1041 case JMM_JVM_UPTIME_MS: 1042 return Management::ticks_to_ms(os::elapsed_counter()); 1043 1044 case JMM_COMPILE_TOTAL_TIME_MS: 1045 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); 1046 1047 case JMM_OS_PROCESS_ID: 1048 return os::current_process_id(); 1049 1050 // Hotspot-specific counters 1051 case JMM_CLASS_LOADED_BYTES: 1052 return ClassLoadingService::loaded_class_bytes(); 1053 1054 case JMM_CLASS_UNLOADED_BYTES: 1055 return ClassLoadingService::unloaded_class_bytes(); 1056 1057 case JMM_SHARED_CLASS_LOADED_COUNT: 1058 return ClassLoadingService::loaded_shared_class_count(); 1059 1060 case JMM_SHARED_CLASS_UNLOADED_COUNT: 1061 return ClassLoadingService::unloaded_shared_class_count(); 1062 1063 1064 case JMM_SHARED_CLASS_LOADED_BYTES: 1065 return ClassLoadingService::loaded_shared_class_bytes(); 1066 1067 case JMM_SHARED_CLASS_UNLOADED_BYTES: 1068 return ClassLoadingService::unloaded_shared_class_bytes(); 1069 1070 case JMM_TOTAL_CLASSLOAD_TIME_MS: 1071 return ClassLoader::classloader_time_ms(); 1072 1073 case JMM_VM_GLOBAL_COUNT: 1074 return get_num_flags(); 1075 1076 case JMM_SAFEPOINT_COUNT: 1077 return RuntimeService::safepoint_count(); 1078 1079 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: 1080 return RuntimeService::safepoint_sync_time_ms(); 1081 1082 case JMM_TOTAL_STOPPED_TIME_MS: 1083 return RuntimeService::safepoint_time_ms(); 1084 1085 case JMM_TOTAL_APP_TIME_MS: 1086 return RuntimeService::application_time_ms(); 1087 1088 case JMM_VM_THREAD_COUNT: 1089 return get_vm_thread_count(); 1090 1091 case JMM_CLASS_INIT_TOTAL_COUNT: 1092 return ClassLoader::class_init_count(); 1093 1094 case JMM_CLASS_INIT_TOTAL_TIME_MS: 1095 return ClassLoader::class_init_time_ms(); 1096 1097 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: 1098 return ClassLoader::class_verify_time_ms(); 1099 1100 case JMM_METHOD_DATA_SIZE_BYTES: 1101 return ClassLoadingService::class_method_data_size(); 1102 1103 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: 1104 return os::physical_memory(); 1105 1106 default: 1107 return -1; 1108 } 1109} 1110 1111 1112// Returns the long value of a given attribute. 1113JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) 1114 if (obj == NULL) { 1115 return get_long_attribute(att); 1116 } else { 1117 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); 1118 if (mgr != NULL) { 1119 return get_gc_attribute(mgr, att); 1120 } 1121 } 1122 return -1; 1123JVM_END 1124 1125// Gets the value of all attributes specified in the given array 1126// and sets the value in the result array. 1127// Returns the number of attributes found. 1128JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, 1129 jobject obj, 1130 jmmLongAttribute* atts, 1131 jint count, 1132 jlong* result)) 1133 1134 int num_atts = 0; 1135 if (obj == NULL) { 1136 for (int i = 0; i < count; i++) { 1137 result[i] = get_long_attribute(atts[i]); 1138 if (result[i] != -1) { 1139 num_atts++; 1140 } 1141 } 1142 } else { 1143 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); 1144 for (int i = 0; i < count; i++) { 1145 result[i] = get_gc_attribute(mgr, atts[i]); 1146 if (result[i] != -1) { 1147 num_atts++; 1148 } 1149 } 1150 } 1151 return num_atts; 1152JVM_END 1153 1154// Helper function to do thread dump for a specific list of threads 1155static void do_thread_dump(ThreadDumpResult* dump_result, 1156 typeArrayHandle ids_ah, // array of thread ID (long[]) 1157 int num_threads, 1158 int max_depth, 1159 bool with_locked_monitors, 1160 bool with_locked_synchronizers, 1161 TRAPS) { 1162 1163 // First get an array of threadObj handles. 1164 // A JavaThread may terminate before we get the stack trace. 1165 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 1166 { 1167 MutexLockerEx ml(Threads_lock); 1168 for (int i = 0; i < num_threads; i++) { 1169 jlong tid = ids_ah->long_at(i); 1170 JavaThread* jt = find_java_thread_from_id(tid); 1171 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); 1172 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); 1173 thread_handle_array->append(threadObj_h); 1174 } 1175 } 1176 1177 // Obtain thread dumps and thread snapshot information 1178 VM_ThreadDump op(dump_result, 1179 thread_handle_array, 1180 num_threads, 1181 max_depth, /* stack depth */ 1182 with_locked_monitors, 1183 with_locked_synchronizers); 1184 VMThread::execute(&op); 1185} 1186 1187// Gets an array of ThreadInfo objects. Each element is the ThreadInfo 1188// for the thread ID specified in the corresponding entry in 1189// the given array of thread IDs; or NULL if the thread does not exist 1190// or has terminated. 1191// 1192// Input parameters: 1193// ids - array of thread IDs 1194// maxDepth - the maximum depth of stack traces to be dumped: 1195// maxDepth == -1 requests to dump entire stack trace. 1196// maxDepth == 0 requests no stack trace. 1197// infoArray - array of ThreadInfo objects 1198// 1199// QQQ - Why does this method return a value instead of void? 1200JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) 1201 // Check if threads is null 1202 if (ids == NULL || infoArray == NULL) { 1203 THROW_(vmSymbols::java_lang_NullPointerException(), -1); 1204 } 1205 1206 if (maxDepth < -1) { 1207 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1208 "Invalid maxDepth", -1); 1209 } 1210 1211 ResourceMark rm(THREAD); 1212 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1213 typeArrayHandle ids_ah(THREAD, ta); 1214 1215 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); 1216 objArrayOop oa = objArrayOop(infoArray_obj); 1217 objArrayHandle infoArray_h(THREAD, oa); 1218 1219 // validate the thread id array 1220 validate_thread_id_array(ids_ah, CHECK_0); 1221 1222 // validate the ThreadInfo[] parameters 1223 validate_thread_info_array(infoArray_h, CHECK_0); 1224 1225 // infoArray must be of the same length as the given array of thread IDs 1226 int num_threads = ids_ah->length(); 1227 if (num_threads != infoArray_h->length()) { 1228 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1229 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); 1230 } 1231 1232 if (JDK_Version::is_gte_jdk16x_version()) { 1233 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1234 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); 1235 } 1236 1237 // Must use ThreadDumpResult to store the ThreadSnapshot. 1238 // GC may occur after the thread snapshots are taken but before 1239 // this function returns. The threadObj and other oops kept 1240 // in the ThreadSnapshot are marked and adjusted during GC. 1241 ThreadDumpResult dump_result(num_threads); 1242 1243 if (maxDepth == 0) { 1244 // no stack trace dumped - do not need to stop the world 1245 { 1246 MutexLockerEx ml(Threads_lock); 1247 for (int i = 0; i < num_threads; i++) { 1248 jlong tid = ids_ah->long_at(i); 1249 JavaThread* jt = find_java_thread_from_id(tid); 1250 ThreadSnapshot* ts; 1251 if (jt == NULL) { 1252 // if the thread does not exist or now it is terminated, 1253 // create dummy snapshot 1254 ts = new ThreadSnapshot(); 1255 } else { 1256 ts = new ThreadSnapshot(jt); 1257 } 1258 dump_result.add_thread_snapshot(ts); 1259 } 1260 } 1261 } else { 1262 // obtain thread dump with the specific list of threads with stack trace 1263 do_thread_dump(&dump_result, 1264 ids_ah, 1265 num_threads, 1266 maxDepth, 1267 false, /* no locked monitor */ 1268 false, /* no locked synchronizers */ 1269 CHECK_0); 1270 } 1271 1272 int num_snapshots = dump_result.num_snapshots(); 1273 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); 1274 int index = 0; 1275 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { 1276 // For each thread, create an java/lang/management/ThreadInfo object 1277 // and fill with the thread information 1278 1279 if (ts->threadObj() == NULL) { 1280 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1281 infoArray_h->obj_at_put(index, NULL); 1282 continue; 1283 } 1284 1285 // Create java.lang.management.ThreadInfo object 1286 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); 1287 infoArray_h->obj_at_put(index, info_obj); 1288 } 1289 return 0; 1290JVM_END 1291 1292// Dump thread info for the specified threads. 1293// It returns an array of ThreadInfo objects. Each element is the ThreadInfo 1294// for the thread ID specified in the corresponding entry in 1295// the given array of thread IDs; or NULL if the thread does not exist 1296// or has terminated. 1297// 1298// Input parameter: 1299// ids - array of thread IDs; NULL indicates all live threads 1300// locked_monitors - if true, dump locked object monitors 1301// locked_synchronizers - if true, dump locked JSR-166 synchronizers 1302// 1303JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) 1304 ResourceMark rm(THREAD); 1305 1306 if (JDK_Version::is_gte_jdk16x_version()) { 1307 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1308 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); 1309 } 1310 1311 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); 1312 int num_threads = (ta != NULL ? ta->length() : 0); 1313 typeArrayHandle ids_ah(THREAD, ta); 1314 1315 ThreadDumpResult dump_result(num_threads); // can safepoint 1316 1317 if (ids_ah() != NULL) { 1318 1319 // validate the thread id array 1320 validate_thread_id_array(ids_ah, CHECK_NULL); 1321 1322 // obtain thread dump of a specific list of threads 1323 do_thread_dump(&dump_result, 1324 ids_ah, 1325 num_threads, 1326 -1, /* entire stack */ 1327 (locked_monitors ? true : false), /* with locked monitors */ 1328 (locked_synchronizers ? true : false), /* with locked synchronizers */ 1329 CHECK_NULL); 1330 } else { 1331 // obtain thread dump of all threads 1332 VM_ThreadDump op(&dump_result, 1333 -1, /* entire stack */ 1334 (locked_monitors ? true : false), /* with locked monitors */ 1335 (locked_synchronizers ? true : false) /* with locked synchronizers */); 1336 VMThread::execute(&op); 1337 } 1338 1339 int num_snapshots = dump_result.num_snapshots(); 1340 1341 // create the result ThreadInfo[] object 1342 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 1343 instanceKlassHandle ik (THREAD, k); 1344 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); 1345 objArrayHandle result_h(THREAD, r); 1346 1347 int index = 0; 1348 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { 1349 if (ts->threadObj() == NULL) { 1350 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1351 result_h->obj_at_put(index, NULL); 1352 continue; 1353 } 1354 1355 ThreadStackTrace* stacktrace = ts->get_stack_trace(); 1356 assert(stacktrace != NULL, "Must have a stack trace dumped"); 1357 1358 // Create Object[] filled with locked monitors 1359 // Create int[] filled with the stack depth where a monitor was locked 1360 int num_frames = stacktrace->get_stack_depth(); 1361 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); 1362 1363 // Count the total number of locked monitors 1364 for (int i = 0; i < num_frames; i++) { 1365 StackFrameInfo* frame = stacktrace->stack_frame_at(i); 1366 num_locked_monitors += frame->num_locked_monitors(); 1367 } 1368 1369 objArrayHandle monitors_array; 1370 typeArrayHandle depths_array; 1371 objArrayHandle synchronizers_array; 1372 1373 if (locked_monitors) { 1374 // Constructs Object[] and int[] to contain the object monitor and the stack depth 1375 // where the thread locked it 1376 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); 1377 objArrayHandle mh(THREAD, array); 1378 monitors_array = mh; 1379 1380 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); 1381 typeArrayHandle dh(THREAD, tarray); 1382 depths_array = dh; 1383 1384 int count = 0; 1385 int j = 0; 1386 for (int depth = 0; depth < num_frames; depth++) { 1387 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); 1388 int len = frame->num_locked_monitors(); 1389 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); 1390 for (j = 0; j < len; j++) { 1391 oop monitor = locked_monitors->at(j); 1392 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); 1393 monitors_array->obj_at_put(count, monitor); 1394 depths_array->int_at_put(count, depth); 1395 count++; 1396 } 1397 } 1398 1399 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); 1400 for (j = 0; j < jni_locked_monitors->length(); j++) { 1401 oop object = jni_locked_monitors->at(j); 1402 assert(object != NULL && object->is_instance(), "must be a Java object"); 1403 monitors_array->obj_at_put(count, object); 1404 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info 1405 depths_array->int_at_put(count, -1); 1406 count++; 1407 } 1408 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); 1409 } 1410 1411 if (locked_synchronizers) { 1412 // Create Object[] filled with locked JSR-166 synchronizers 1413 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); 1414 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); 1415 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); 1416 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); 1417 1418 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); 1419 objArrayHandle sh(THREAD, array); 1420 synchronizers_array = sh; 1421 1422 for (int k = 0; k < num_locked_synchronizers; k++) { 1423 synchronizers_array->obj_at_put(k, locks->at(k)); 1424 } 1425 } 1426 1427 // Create java.lang.management.ThreadInfo object 1428 instanceOop info_obj = Management::create_thread_info_instance(ts, 1429 monitors_array, 1430 depths_array, 1431 synchronizers_array, 1432 CHECK_NULL); 1433 result_h->obj_at_put(index, info_obj); 1434 } 1435 1436 return (jobjectArray) JNIHandles::make_local(env, result_h()); 1437JVM_END 1438 1439// Returns an array of Class objects. 1440JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) 1441 ResourceMark rm(THREAD); 1442 1443 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter 1444 1445 int num_classes = lce.num_loaded_classes(); 1446 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); 1447 objArrayHandle classes_ah(THREAD, r); 1448 1449 for (int i = 0; i < num_classes; i++) { 1450 KlassHandle kh = lce.get_klass(i); 1451 oop mirror = kh()->java_mirror(); 1452 classes_ah->obj_at_put(i, mirror); 1453 } 1454 1455 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); 1456JVM_END 1457 1458// Reset statistic. Return true if the requested statistic is reset. 1459// Otherwise, return false. 1460// 1461// Input parameters: 1462// obj - specify which instance the statistic associated with to be reset 1463// For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. 1464// For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. 1465// type - the type of statistic to be reset 1466// 1467JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) 1468 ResourceMark rm(THREAD); 1469 1470 switch (type) { 1471 case JMM_STAT_PEAK_THREAD_COUNT: 1472 ThreadService::reset_peak_thread_count(); 1473 return true; 1474 1475 case JMM_STAT_THREAD_CONTENTION_COUNT: 1476 case JMM_STAT_THREAD_CONTENTION_TIME: { 1477 jlong tid = obj.j; 1478 if (tid < 0) { 1479 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); 1480 } 1481 1482 // Look for the JavaThread of this given tid 1483 MutexLockerEx ml(Threads_lock); 1484 if (tid == 0) { 1485 // reset contention statistics for all threads if tid == 0 1486 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { 1487 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1488 ThreadService::reset_contention_count_stat(java_thread); 1489 } else { 1490 ThreadService::reset_contention_time_stat(java_thread); 1491 } 1492 } 1493 } else { 1494 // reset contention statistics for a given thread 1495 JavaThread* java_thread = find_java_thread_from_id(tid); 1496 if (java_thread == NULL) { 1497 return false; 1498 } 1499 1500 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1501 ThreadService::reset_contention_count_stat(java_thread); 1502 } else { 1503 ThreadService::reset_contention_time_stat(java_thread); 1504 } 1505 } 1506 return true; 1507 break; 1508 } 1509 case JMM_STAT_PEAK_POOL_USAGE: { 1510 jobject o = obj.l; 1511 if (o == NULL) { 1512 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1513 } 1514 1515 oop pool_obj = JNIHandles::resolve(o); 1516 assert(pool_obj->is_instance(), "Should be an instanceOop"); 1517 instanceHandle ph(THREAD, (instanceOop) pool_obj); 1518 1519 MemoryPool* pool = MemoryService::get_memory_pool(ph); 1520 if (pool != NULL) { 1521 pool->reset_peak_memory_usage(); 1522 return true; 1523 } 1524 break; 1525 } 1526 case JMM_STAT_GC_STAT: { 1527 jobject o = obj.l; 1528 if (o == NULL) { 1529 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1530 } 1531 1532 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); 1533 if (mgr != NULL) { 1534 mgr->reset_gc_stat(); 1535 return true; 1536 } 1537 break; 1538 } 1539 default: 1540 assert(0, "Unknown Statistic Type"); 1541 } 1542 return false; 1543JVM_END 1544 1545// Returns the fast estimate of CPU time consumed by 1546// a given thread (in nanoseconds). 1547// If thread_id == 0, return CPU time for the current thread. 1548JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) 1549 if (!os::is_thread_cpu_time_supported()) { 1550 return -1; 1551 } 1552 1553 if (thread_id < 0) { 1554 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1555 "Invalid thread ID", -1); 1556 } 1557 1558 JavaThread* java_thread = NULL; 1559 if (thread_id == 0) { 1560 // current thread 1561 return os::current_thread_cpu_time(); 1562 } else { 1563 MutexLockerEx ml(Threads_lock); 1564 java_thread = find_java_thread_from_id(thread_id); 1565 if (java_thread != NULL) { 1566 return os::thread_cpu_time((Thread*) java_thread); 1567 } 1568 } 1569 return -1; 1570JVM_END 1571 1572// Returns the CPU time consumed by a given thread (in nanoseconds). 1573// If thread_id == 0, CPU time for the current thread is returned. 1574// If user_sys_cpu_time = true, user level and system CPU time of 1575// a given thread is returned; otherwise, only user level CPU time 1576// is returned. 1577JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) 1578 if (!os::is_thread_cpu_time_supported()) { 1579 return -1; 1580 } 1581 1582 if (thread_id < 0) { 1583 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1584 "Invalid thread ID", -1); 1585 } 1586 1587 JavaThread* java_thread = NULL; 1588 if (thread_id == 0) { 1589 // current thread 1590 return os::current_thread_cpu_time(user_sys_cpu_time != 0); 1591 } else { 1592 MutexLockerEx ml(Threads_lock); 1593 java_thread = find_java_thread_from_id(thread_id); 1594 if (java_thread != NULL) { 1595 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); 1596 } 1597 } 1598 return -1; 1599JVM_END 1600 1601// Gets an array containing the CPU times consumed by a set of threads 1602// (in nanoseconds). Each element of the array is the CPU time for the 1603// thread ID specified in the corresponding entry in the given array 1604// of thread IDs; or -1 if the thread does not exist or has terminated. 1605// If user_sys_cpu_time = true, the sum of user level and system CPU time 1606// for the given thread is returned; otherwise, only user level CPU time 1607// is returned. 1608JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, 1609 jlongArray timeArray, 1610 jboolean user_sys_cpu_time)) 1611 // Check if threads is null 1612 if (ids == NULL || timeArray == NULL) { 1613 THROW(vmSymbols::java_lang_NullPointerException()); 1614 } 1615 1616 ResourceMark rm(THREAD); 1617 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1618 typeArrayHandle ids_ah(THREAD, ta); 1619 1620 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); 1621 typeArrayHandle timeArray_h(THREAD, tia); 1622 1623 // validate the thread id array 1624 validate_thread_id_array(ids_ah, CHECK); 1625 1626 // timeArray must be of the same length as the given array of thread IDs 1627 int num_threads = ids_ah->length(); 1628 if (num_threads != timeArray_h->length()) { 1629 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1630 "The length of the given long array does not match the length of " 1631 "the given array of thread IDs"); 1632 } 1633 1634 MutexLockerEx ml(Threads_lock); 1635 for (int i = 0; i < num_threads; i++) { 1636 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 1637 if (java_thread != NULL) { 1638 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, 1639 user_sys_cpu_time != 0)); 1640 } 1641 } 1642JVM_END 1643 1644// Returns a String array of all VM global flag names 1645JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) 1646 // last flag entry is always NULL, so subtract 1 1647 int nFlags = (int) Flag::numFlags - 1; 1648 // allocate a temp array 1649 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1650 nFlags, CHECK_0); 1651 objArrayHandle flags_ah(THREAD, r); 1652 int num_entries = 0; 1653 for (int i = 0; i < nFlags; i++) { 1654 Flag* flag = &Flag::flags[i]; 1655 // Exclude notproduct and develop flags in product builds. 1656 if (flag->is_constant_in_binary()) { 1657 continue; 1658 } 1659 // Exclude the locked (experimental, diagnostic) flags 1660 if (flag->is_unlocked() || flag->is_unlocker()) { 1661 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0); 1662 flags_ah->obj_at_put(num_entries, s()); 1663 num_entries++; 1664 } 1665 } 1666 1667 if (num_entries < nFlags) { 1668 // Return array of right length 1669 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); 1670 for(int i = 0; i < num_entries; i++) { 1671 res->obj_at_put(i, flags_ah->obj_at(i)); 1672 } 1673 return (jobjectArray)JNIHandles::make_local(env, res); 1674 } 1675 1676 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); 1677JVM_END 1678 1679// Utility function used by jmm_GetVMGlobals. Returns false if flag type 1680// can't be determined, true otherwise. If false is returned, then *global 1681// will be incomplete and invalid. 1682bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { 1683 Handle flag_name; 1684 if (name() == NULL) { 1685 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false); 1686 } else { 1687 flag_name = name; 1688 } 1689 global->name = (jstring)JNIHandles::make_local(env, flag_name()); 1690 1691 if (flag->is_bool()) { 1692 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; 1693 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; 1694 } else if (flag->is_intx()) { 1695 global->value.j = (jlong)flag->get_intx(); 1696 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1697 } else if (flag->is_uintx()) { 1698 global->value.j = (jlong)flag->get_uintx(); 1699 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1700 } else if (flag->is_uint64_t()) { 1701 global->value.j = (jlong)flag->get_uint64_t(); 1702 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1703 } else if (flag->is_ccstr()) { 1704 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); 1705 global->value.l = (jobject)JNIHandles::make_local(env, str()); 1706 global->type = JMM_VMGLOBAL_TYPE_JSTRING; 1707 } else { 1708 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; 1709 return false; 1710 } 1711 1712 global->writeable = flag->is_writeable(); 1713 global->external = flag->is_external(); 1714 switch (flag->get_origin()) { 1715 case Flag::DEFAULT: 1716 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; 1717 break; 1718 case Flag::COMMAND_LINE: 1719 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; 1720 break; 1721 case Flag::ENVIRON_VAR: 1722 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; 1723 break; 1724 case Flag::CONFIG_FILE: 1725 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; 1726 break; 1727 case Flag::MANAGEMENT: 1728 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; 1729 break; 1730 case Flag::ERGONOMIC: 1731 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; 1732 break; 1733 case Flag::ATTACH_ON_DEMAND: 1734 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND; 1735 break; 1736 default: 1737 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; 1738 } 1739 1740 return true; 1741} 1742 1743// Fill globals array of count length with jmmVMGlobal entries 1744// specified by names. If names == NULL, fill globals array 1745// with all Flags. Return value is number of entries 1746// created in globals. 1747// If a Flag with a given name in an array element does not 1748// exist, globals[i].name will be set to NULL. 1749JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, 1750 jobjectArray names, 1751 jmmVMGlobal *globals, 1752 jint count)) 1753 1754 1755 if (globals == NULL) { 1756 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1757 } 1758 1759 ResourceMark rm(THREAD); 1760 1761 if (names != NULL) { 1762 // return the requested globals 1763 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); 1764 objArrayHandle names_ah(THREAD, ta); 1765 // Make sure we have a String array 1766 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1767 if (element_klass != SystemDictionary::String_klass()) { 1768 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1769 "Array element type is not String class", 0); 1770 } 1771 1772 int names_length = names_ah->length(); 1773 int num_entries = 0; 1774 for (int i = 0; i < names_length && i < count; i++) { 1775 oop s = names_ah->obj_at(i); 1776 if (s == NULL) { 1777 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1778 } 1779 1780 Handle sh(THREAD, s); 1781 char* str = java_lang_String::as_utf8_string(s); 1782 Flag* flag = Flag::find_flag(str, strlen(str)); 1783 if (flag != NULL && 1784 add_global_entry(env, sh, &globals[i], flag, THREAD)) { 1785 num_entries++; 1786 } else { 1787 globals[i].name = NULL; 1788 } 1789 } 1790 return num_entries; 1791 } else { 1792 // return all globals if names == NULL 1793 1794 // last flag entry is always NULL, so subtract 1 1795 int nFlags = (int) Flag::numFlags - 1; 1796 Handle null_h; 1797 int num_entries = 0; 1798 for (int i = 0; i < nFlags && num_entries < count; i++) { 1799 Flag* flag = &Flag::flags[i]; 1800 // Exclude notproduct and develop flags in product builds. 1801 if (flag->is_constant_in_binary()) { 1802 continue; 1803 } 1804 // Exclude the locked (diagnostic, experimental) flags 1805 if ((flag->is_unlocked() || flag->is_unlocker()) && 1806 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { 1807 num_entries++; 1808 } 1809 } 1810 return num_entries; 1811 } 1812JVM_END 1813 1814JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) 1815 ResourceMark rm(THREAD); 1816 1817 oop fn = JNIHandles::resolve_external_guard(flag_name); 1818 if (fn == NULL) { 1819 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 1820 "The flag name cannot be null."); 1821 } 1822 char* name = java_lang_String::as_utf8_string(fn); 1823 Flag* flag = Flag::find_flag(name, strlen(name)); 1824 if (flag == NULL) { 1825 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1826 "Flag does not exist."); 1827 } 1828 if (!flag->is_writeable()) { 1829 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1830 "This flag is not writeable."); 1831 } 1832 1833 bool succeed = false; 1834 if (flag->is_bool()) { 1835 bool bvalue = (new_value.z == JNI_TRUE ? true : false); 1836 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT); 1837 } else if (flag->is_intx()) { 1838 intx ivalue = (intx)new_value.j; 1839 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT); 1840 } else if (flag->is_uintx()) { 1841 uintx uvalue = (uintx)new_value.j; 1842 1843 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) { 1844 FormatBuffer<80> err_msg("%s", ""); 1845 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) { 1846 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer()); 1847 } 1848 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) { 1849 FormatBuffer<80> err_msg("%s", ""); 1850 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) { 1851 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer()); 1852 } 1853 } 1854 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT); 1855 } else if (flag->is_uint64_t()) { 1856 uint64_t uvalue = (uint64_t)new_value.j; 1857 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT); 1858 } else if (flag->is_ccstr()) { 1859 oop str = JNIHandles::resolve_external_guard(new_value.l); 1860 if (str == NULL) { 1861 THROW(vmSymbols::java_lang_NullPointerException()); 1862 } 1863 ccstr svalue = java_lang_String::as_utf8_string(str); 1864 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT); 1865 if (succeed) { 1866 FREE_C_HEAP_ARRAY(char, svalue, mtInternal); 1867 } 1868 } 1869 assert(succeed, "Setting flag should succeed"); 1870JVM_END 1871 1872class ThreadTimesClosure: public ThreadClosure { 1873 private: 1874 objArrayHandle _names_strings; 1875 char **_names_chars; 1876 typeArrayHandle _times; 1877 int _names_len; 1878 int _times_len; 1879 int _count; 1880 1881 public: 1882 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times); 1883 ~ThreadTimesClosure(); 1884 virtual void do_thread(Thread* thread); 1885 void do_unlocked(); 1886 int count() { return _count; } 1887}; 1888 1889ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, 1890 typeArrayHandle times) { 1891 assert(names() != NULL, "names was NULL"); 1892 assert(times() != NULL, "times was NULL"); 1893 _names_strings = names; 1894 _names_len = names->length(); 1895 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); 1896 _times = times; 1897 _times_len = times->length(); 1898 _count = 0; 1899} 1900 1901// 1902// Called with Threads_lock held 1903// 1904void ThreadTimesClosure::do_thread(Thread* thread) { 1905 assert(thread != NULL, "thread was NULL"); 1906 1907 // exclude externally visible JavaThreads 1908 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 1909 return; 1910 } 1911 1912 if (_count >= _names_len || _count >= _times_len) { 1913 // skip if the result array is not big enough 1914 return; 1915 } 1916 1917 EXCEPTION_MARK; 1918 ResourceMark rm(THREAD); // thread->name() uses ResourceArea 1919 1920 assert(thread->name() != NULL, "All threads should have a name"); 1921 _names_chars[_count] = strdup(thread->name()); 1922 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? 1923 os::thread_cpu_time(thread) : -1); 1924 _count++; 1925} 1926 1927// Called without Threads_lock, we can allocate String objects. 1928void ThreadTimesClosure::do_unlocked() { 1929 1930 EXCEPTION_MARK; 1931 for (int i = 0; i < _count; i++) { 1932 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); 1933 _names_strings->obj_at_put(i, s()); 1934 } 1935} 1936 1937ThreadTimesClosure::~ThreadTimesClosure() { 1938 for (int i = 0; i < _count; i++) { 1939 free(_names_chars[i]); 1940 } 1941 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal); 1942} 1943 1944// Fills names with VM internal thread names and times with the corresponding 1945// CPU times. If names or times is NULL, a NullPointerException is thrown. 1946// If the element type of names is not String, an IllegalArgumentException is 1947// thrown. 1948// If an array is not large enough to hold all the entries, only the entries 1949// that fit will be returned. Return value is the number of VM internal 1950// threads entries. 1951JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, 1952 jobjectArray names, 1953 jlongArray times)) 1954 if (names == NULL || times == NULL) { 1955 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1956 } 1957 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); 1958 objArrayHandle names_ah(THREAD, na); 1959 1960 // Make sure we have a String array 1961 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1962 if (element_klass != SystemDictionary::String_klass()) { 1963 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1964 "Array element type is not String class", 0); 1965 } 1966 1967 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); 1968 typeArrayHandle times_ah(THREAD, ta); 1969 1970 ThreadTimesClosure ttc(names_ah, times_ah); 1971 { 1972 MutexLockerEx ml(Threads_lock); 1973 Threads::threads_do(&ttc); 1974 } 1975 ttc.do_unlocked(); 1976 return ttc.count(); 1977JVM_END 1978 1979static Handle find_deadlocks(bool object_monitors_only, TRAPS) { 1980 ResourceMark rm(THREAD); 1981 1982 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); 1983 VMThread::execute(&op); 1984 1985 DeadlockCycle* deadlocks = op.result(); 1986 if (deadlocks == NULL) { 1987 // no deadlock found and return 1988 return Handle(); 1989 } 1990 1991 int num_threads = 0; 1992 DeadlockCycle* cycle; 1993 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1994 num_threads += cycle->num_threads(); 1995 } 1996 1997 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); 1998 objArrayHandle threads_ah(THREAD, r); 1999 2000 int index = 0; 2001 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 2002 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); 2003 int len = deadlock_threads->length(); 2004 for (int i = 0; i < len; i++) { 2005 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); 2006 index++; 2007 } 2008 } 2009 return threads_ah; 2010} 2011 2012// Finds cycles of threads that are deadlocked involved in object monitors 2013// and JSR-166 synchronizers. 2014// Returns an array of Thread objects which are in deadlock, if any. 2015// Otherwise, returns NULL. 2016// 2017// Input parameter: 2018// object_monitors_only - if true, only check object monitors 2019// 2020JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) 2021 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); 2022 return (jobjectArray) JNIHandles::make_local(env, result()); 2023JVM_END 2024 2025// Finds cycles of threads that are deadlocked on monitor locks 2026// Returns an array of Thread objects which are in deadlock, if any. 2027// Otherwise, returns NULL. 2028JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) 2029 Handle result = find_deadlocks(true, CHECK_0); 2030 return (jobjectArray) JNIHandles::make_local(env, result()); 2031JVM_END 2032 2033// Gets the information about GC extension attributes including 2034// the name of the attribute, its type, and a short description. 2035// 2036// Input parameters: 2037// mgr - GC memory manager 2038// info - caller allocated array of jmmExtAttributeInfo 2039// count - number of elements of the info array 2040// 2041// Returns the number of GC extension attributes filled in the info array; or 2042// -1 if info is not big enough 2043// 2044JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) 2045 // All GC memory managers have 1 attribute (number of GC threads) 2046 if (count == 0) { 2047 return 0; 2048 } 2049 2050 if (info == NULL) { 2051 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2052 } 2053 2054 info[0].name = "GcThreadCount"; 2055 info[0].type = 'I'; 2056 info[0].description = "Number of GC threads"; 2057 return 1; 2058JVM_END 2059 2060// verify the given array is an array of java/lang/management/MemoryUsage objects 2061// of a given length and return the objArrayOop 2062static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { 2063 if (array == NULL) { 2064 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2065 } 2066 2067 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); 2068 objArrayHandle array_h(THREAD, oa); 2069 2070 // array must be of the given length 2071 if (length != array_h->length()) { 2072 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2073 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); 2074 } 2075 2076 // check if the element of array is of type MemoryUsage class 2077 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); 2078 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass(); 2079 if (element_klass != usage_klass) { 2080 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2081 "The element type is not MemoryUsage class", 0); 2082 } 2083 2084 return array_h(); 2085} 2086 2087// Gets the statistics of the last GC of a given GC memory manager. 2088// Input parameters: 2089// obj - GarbageCollectorMXBean object 2090// gc_stat - caller allocated jmmGCStat where: 2091// a. before_gc_usage - array of MemoryUsage objects 2092// b. after_gc_usage - array of MemoryUsage objects 2093// c. gc_ext_attributes_values_size is set to the 2094// gc_ext_attribute_values array allocated 2095// d. gc_ext_attribute_values is a caller allocated array of jvalue. 2096// 2097// On return, 2098// gc_index == 0 indicates no GC statistics available 2099// 2100// before_gc_usage and after_gc_usage - filled with per memory pool 2101// before and after GC usage in the same order as the memory pools 2102// returned by GetMemoryPools for a given GC memory manager. 2103// num_gc_ext_attributes indicates the number of elements in 2104// the gc_ext_attribute_values array is filled; or 2105// -1 if the gc_ext_attributes_values array is not big enough 2106// 2107JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) 2108 ResourceMark rm(THREAD); 2109 2110 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { 2111 THROW(vmSymbols::java_lang_NullPointerException()); 2112 } 2113 2114 // Get the GCMemoryManager 2115 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2116 2117 // Make a copy of the last GC statistics 2118 // GC may occur while constructing the last GC information 2119 int num_pools = MemoryService::num_memory_pools(); 2120 GCStatInfo stat(num_pools); 2121 if (mgr->get_last_gc_stat(&stat) == 0) { 2122 gc_stat->gc_index = 0; 2123 return; 2124 } 2125 2126 gc_stat->gc_index = stat.gc_index(); 2127 gc_stat->start_time = Management::ticks_to_ms(stat.start_time()); 2128 gc_stat->end_time = Management::ticks_to_ms(stat.end_time()); 2129 2130 // Current implementation does not have GC extension attributes 2131 gc_stat->num_gc_ext_attributes = 0; 2132 2133 // Fill the arrays of MemoryUsage objects with before and after GC 2134 // per pool memory usage 2135 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, 2136 num_pools, 2137 CHECK); 2138 objArrayHandle usage_before_gc_ah(THREAD, bu); 2139 2140 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, 2141 num_pools, 2142 CHECK); 2143 objArrayHandle usage_after_gc_ah(THREAD, au); 2144 2145 for (int i = 0; i < num_pools; i++) { 2146 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK); 2147 Handle after_usage; 2148 2149 MemoryUsage u = stat.after_gc_usage_for_pool(i); 2150 if (u.max_size() == 0 && u.used() > 0) { 2151 // If max size == 0, this pool is a survivor space. 2152 // Set max size = -1 since the pools will be swapped after GC. 2153 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); 2154 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); 2155 } else { 2156 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK); 2157 } 2158 usage_before_gc_ah->obj_at_put(i, before_usage()); 2159 usage_after_gc_ah->obj_at_put(i, after_usage()); 2160 } 2161 2162 if (gc_stat->gc_ext_attribute_values_size > 0) { 2163 // Current implementation only has 1 attribute (number of GC threads) 2164 // The type is 'I' 2165 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); 2166 } 2167JVM_END 2168 2169JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) 2170 ResourceMark rm(THREAD); 2171 // Get the GCMemoryManager 2172 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2173 mgr->set_notification_enabled(enabled?true:false); 2174JVM_END 2175 2176// Dump heap - Returns 0 if succeeds. 2177JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) 2178#if INCLUDE_SERVICES 2179 ResourceMark rm(THREAD); 2180 oop on = JNIHandles::resolve_external_guard(outputfile); 2181 if (on == NULL) { 2182 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2183 "Output file name cannot be null.", -1); 2184 } 2185 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1)); 2186 if (name == NULL) { 2187 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2188 "Output file name cannot be null.", -1); 2189 } 2190 HeapDumper dumper(live ? true : false); 2191 if (dumper.dump(name) != 0) { 2192 const char* errmsg = dumper.error_as_C_string(); 2193 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); 2194 } 2195 return 0; 2196#else // INCLUDE_SERVICES 2197 return -1; 2198#endif // INCLUDE_SERVICES 2199JVM_END 2200 2201JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) 2202 ResourceMark rm(THREAD); 2203 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean); 2204 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), 2205 dcmd_list->length(), CHECK_NULL); 2206 objArrayHandle cmd_array(THREAD, cmd_array_oop); 2207 for (int i = 0; i < dcmd_list->length(); i++) { 2208 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); 2209 cmd_array->obj_at_put(i, cmd_name); 2210 } 2211 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); 2212JVM_END 2213 2214JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, 2215 dcmdInfo* infoArray)) 2216 if (cmds == NULL || infoArray == NULL) { 2217 THROW(vmSymbols::java_lang_NullPointerException()); 2218 } 2219 2220 ResourceMark rm(THREAD); 2221 2222 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); 2223 objArrayHandle cmds_ah(THREAD, ca); 2224 2225 // Make sure we have a String array 2226 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass(); 2227 if (element_klass != SystemDictionary::String_klass()) { 2228 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2229 "Array element type is not String class"); 2230 } 2231 2232 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean); 2233 2234 int num_cmds = cmds_ah->length(); 2235 for (int i = 0; i < num_cmds; i++) { 2236 oop cmd = cmds_ah->obj_at(i); 2237 if (cmd == NULL) { 2238 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2239 "Command name cannot be null."); 2240 } 2241 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2242 if (cmd_name == NULL) { 2243 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2244 "Command name cannot be null."); 2245 } 2246 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); 2247 if (pos == -1) { 2248 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2249 "Unknown diagnostic command"); 2250 } 2251 DCmdInfo* info = info_list->at(pos); 2252 infoArray[i].name = info->name(); 2253 infoArray[i].description = info->description(); 2254 infoArray[i].impact = info->impact(); 2255 JavaPermission p = info->permission(); 2256 infoArray[i].permission_class = p._class; 2257 infoArray[i].permission_name = p._name; 2258 infoArray[i].permission_action = p._action; 2259 infoArray[i].num_arguments = info->num_arguments(); 2260 infoArray[i].enabled = info->is_enabled(); 2261 } 2262JVM_END 2263 2264JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, 2265 jstring command, dcmdArgInfo* infoArray)) 2266 ResourceMark rm(THREAD); 2267 oop cmd = JNIHandles::resolve_external_guard(command); 2268 if (cmd == NULL) { 2269 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2270 "Command line cannot be null."); 2271 } 2272 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2273 if (cmd_name == NULL) { 2274 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2275 "Command line content cannot be null."); 2276 } 2277 DCmd* dcmd = NULL; 2278 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name, 2279 strlen(cmd_name)); 2280 if (factory != NULL) { 2281 dcmd = factory->create_resource_instance(NULL); 2282 } 2283 if (dcmd == NULL) { 2284 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2285 "Unknown diagnostic command"); 2286 } 2287 DCmdMark mark(dcmd); 2288 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); 2289 if (array->length() == 0) { 2290 return; 2291 } 2292 for (int i = 0; i < array->length(); i++) { 2293 infoArray[i].name = array->at(i)->name(); 2294 infoArray[i].description = array->at(i)->description(); 2295 infoArray[i].type = array->at(i)->type(); 2296 infoArray[i].default_string = array->at(i)->default_string(); 2297 infoArray[i].mandatory = array->at(i)->is_mandatory(); 2298 infoArray[i].option = array->at(i)->is_option(); 2299 infoArray[i].multiple = array->at(i)->is_multiple(); 2300 infoArray[i].position = array->at(i)->position(); 2301 } 2302 return; 2303JVM_END 2304 2305JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) 2306 ResourceMark rm(THREAD); 2307 oop cmd = JNIHandles::resolve_external_guard(commandline); 2308 if (cmd == NULL) { 2309 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2310 "Command line cannot be null."); 2311 } 2312 char* cmdline = java_lang_String::as_utf8_string(cmd); 2313 if (cmdline == NULL) { 2314 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2315 "Command line content cannot be null."); 2316 } 2317 bufferedStream output; 2318 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL); 2319 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); 2320 return (jstring) JNIHandles::make_local(env, result); 2321JVM_END 2322 2323JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled)) 2324 DCmdFactory::set_jmx_notification_enabled(enabled?true:false); 2325JVM_END 2326 2327jlong Management::ticks_to_ms(jlong ticks) { 2328 assert(os::elapsed_frequency() > 0, "Must be non-zero"); 2329 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) 2330 * (double)1000.0); 2331} 2332 2333const struct jmmInterface_1_ jmm_interface = { 2334 NULL, 2335 NULL, 2336 jmm_GetVersion, 2337 jmm_GetOptionalSupport, 2338 jmm_GetInputArguments, 2339 jmm_GetThreadInfo, 2340 jmm_GetInputArgumentArray, 2341 jmm_GetMemoryPools, 2342 jmm_GetMemoryManagers, 2343 jmm_GetMemoryPoolUsage, 2344 jmm_GetPeakMemoryPoolUsage, 2345 jmm_GetThreadAllocatedMemory, 2346 jmm_GetMemoryUsage, 2347 jmm_GetLongAttribute, 2348 jmm_GetBoolAttribute, 2349 jmm_SetBoolAttribute, 2350 jmm_GetLongAttributes, 2351 jmm_FindMonitorDeadlockedThreads, 2352 jmm_GetThreadCpuTime, 2353 jmm_GetVMGlobalNames, 2354 jmm_GetVMGlobals, 2355 jmm_GetInternalThreadTimes, 2356 jmm_ResetStatistic, 2357 jmm_SetPoolSensor, 2358 jmm_SetPoolThreshold, 2359 jmm_GetPoolCollectionUsage, 2360 jmm_GetGCExtAttributeInfo, 2361 jmm_GetLastGCStat, 2362 jmm_GetThreadCpuTimeWithKind, 2363 jmm_GetThreadCpuTimesWithKind, 2364 jmm_DumpHeap0, 2365 jmm_FindDeadlockedThreads, 2366 jmm_SetVMGlobal, 2367 NULL, 2368 jmm_DumpThreads, 2369 jmm_SetGCNotificationEnabled, 2370 jmm_GetDiagnosticCommands, 2371 jmm_GetDiagnosticCommandInfo, 2372 jmm_GetDiagnosticCommandArgumentsInfo, 2373 jmm_ExecuteDiagnosticCommand, 2374 jmm_SetDiagnosticFrameworkNotificationEnabled 2375}; 2376#endif // INCLUDE_MANAGEMENT 2377 2378void* Management::get_jmm_interface(int version) { 2379#if INCLUDE_MANAGEMENT 2380 if (version == JMM_VERSION_1_0) { 2381 return (void*) &jmm_interface; 2382 } 2383#endif // INCLUDE_MANAGEMENT 2384 return NULL; 2385} 2386