management.cpp revision 6402:2377269bd73d
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 "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 59PerfVariable* Management::_begin_vm_creation_time = NULL; 60PerfVariable* Management::_end_vm_creation_time = NULL; 61PerfVariable* Management::_vm_init_done_time = NULL; 62 63Klass* Management::_sensor_klass = NULL; 64Klass* Management::_threadInfo_klass = NULL; 65Klass* Management::_memoryUsage_klass = NULL; 66Klass* Management::_memoryPoolMXBean_klass = NULL; 67Klass* Management::_memoryManagerMXBean_klass = NULL; 68Klass* Management::_garbageCollectorMXBean_klass = NULL; 69Klass* Management::_managementFactory_klass = NULL; 70Klass* Management::_garbageCollectorImpl_klass = NULL; 71Klass* Management::_gcInfo_klass = NULL; 72Klass* Management::_diagnosticCommandImpl_klass = NULL; 73Klass* Management::_managementFactoryHelper_klass = NULL; 74 75 76jmmOptionalSupport Management::_optional_support = {0}; 77TimeStamp Management::_stamp; 78 79void management_init() { 80#if INCLUDE_MANAGEMENT 81 Management::init(); 82 ThreadService::init(); 83 RuntimeService::init(); 84 ClassLoadingService::init(); 85#else 86 ThreadService::init(); 87 // Make sure the VM version is initialized 88 // This is normally called by RuntimeService::init(). 89 // Since that is conditionalized out, we need to call it here. 90 Abstract_VM_Version::initialize(); 91#endif // INCLUDE_MANAGEMENT 92} 93 94#if INCLUDE_MANAGEMENT 95 96void Management::init() { 97 EXCEPTION_MARK; 98 99 // These counters are for java.lang.management API support. 100 // They are created even if -XX:-UsePerfData is set and in 101 // that case, they will be allocated on C heap. 102 103 _begin_vm_creation_time = 104 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", 105 PerfData::U_None, CHECK); 106 107 _end_vm_creation_time = 108 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", 109 PerfData::U_None, CHECK); 110 111 _vm_init_done_time = 112 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", 113 PerfData::U_None, CHECK); 114 115 // Initialize optional support 116 _optional_support.isLowMemoryDetectionSupported = 1; 117 _optional_support.isCompilationTimeMonitoringSupported = 1; 118 _optional_support.isThreadContentionMonitoringSupported = 1; 119 120 if (os::is_thread_cpu_time_supported()) { 121 _optional_support.isCurrentThreadCpuTimeSupported = 1; 122 _optional_support.isOtherThreadCpuTimeSupported = 1; 123 } else { 124 _optional_support.isCurrentThreadCpuTimeSupported = 0; 125 _optional_support.isOtherThreadCpuTimeSupported = 0; 126 } 127 128 _optional_support.isBootClassPathSupported = 1; 129 _optional_support.isObjectMonitorUsageSupported = 1; 130#if INCLUDE_SERVICES 131 // This depends on the heap inspector 132 _optional_support.isSynchronizerUsageSupported = 1; 133#endif // INCLUDE_SERVICES 134 _optional_support.isThreadAllocatedMemorySupported = 1; 135 _optional_support.isRemoteDiagnosticCommandsSupported = 1; 136 137 // Registration of the diagnostic commands 138 DCmdRegistrant::register_dcmds(); 139 DCmdRegistrant::register_dcmds_ext(); 140 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 141 | DCmd_Source_MBean; 142 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 143} 144 145void Management::initialize(TRAPS) { 146 // Start the service thread 147 ServiceThread::initialize(); 148 149 if (ManagementServer) { 150 ResourceMark rm(THREAD); 151 HandleMark hm(THREAD); 152 153 // Load and initialize the sun.management.Agent class 154 // invoke startAgent method to start the management server 155 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 156 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_management_Agent(), 157 loader, 158 Handle(), 159 THREAD); 160 if (k == NULL) { 161 vm_exit_during_initialization("Management agent initialization failure: " 162 "class sun.management.Agent not found."); 163 } 164 instanceKlassHandle ik (THREAD, k); 165 166 JavaValue result(T_VOID); 167 JavaCalls::call_static(&result, 168 ik, 169 vmSymbols::startAgent_name(), 170 vmSymbols::void_method_signature(), 171 CHECK); 172 } 173} 174 175void Management::get_optional_support(jmmOptionalSupport* support) { 176 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); 177} 178 179Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) { 180 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); 181 instanceKlassHandle ik (THREAD, k); 182 if (ik->should_be_initialized()) { 183 ik->initialize(CHECK_NULL); 184 } 185 // If these classes change to not be owned by the boot loader, they need 186 // to be walked to keep their class loader alive in oops_do. 187 assert(ik->class_loader() == NULL, "need to follow in oops_do"); 188 return ik(); 189} 190 191void Management::record_vm_startup_time(jlong begin, jlong duration) { 192 // if the performance counter is not initialized, 193 // then vm initialization failed; simply return. 194 if (_begin_vm_creation_time == NULL) return; 195 196 _begin_vm_creation_time->set_value(begin); 197 _end_vm_creation_time->set_value(begin + duration); 198 PerfMemory::set_accessible(true); 199} 200 201jlong Management::timestamp() { 202 TimeStamp t; 203 t.update(); 204 return t.ticks() - _stamp.ticks(); 205} 206 207void Management::oops_do(OopClosure* f) { 208 MemoryService::oops_do(f); 209 ThreadService::oops_do(f); 210} 211 212Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) { 213 if (_threadInfo_klass == NULL) { 214 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); 215 } 216 return _threadInfo_klass; 217} 218 219Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) { 220 if (_memoryUsage_klass == NULL) { 221 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); 222 } 223 return _memoryUsage_klass; 224} 225 226Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { 227 if (_memoryPoolMXBean_klass == NULL) { 228 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); 229 } 230 return _memoryPoolMXBean_klass; 231} 232 233Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { 234 if (_memoryManagerMXBean_klass == NULL) { 235 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); 236 } 237 return _memoryManagerMXBean_klass; 238} 239 240Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { 241 if (_garbageCollectorMXBean_klass == NULL) { 242 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); 243 } 244 return _garbageCollectorMXBean_klass; 245} 246 247Klass* Management::sun_management_Sensor_klass(TRAPS) { 248 if (_sensor_klass == NULL) { 249 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); 250 } 251 return _sensor_klass; 252} 253 254Klass* Management::sun_management_ManagementFactory_klass(TRAPS) { 255 if (_managementFactory_klass == NULL) { 256 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); 257 } 258 return _managementFactory_klass; 259} 260 261Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { 262 if (_garbageCollectorImpl_klass == NULL) { 263 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); 264 } 265 return _garbageCollectorImpl_klass; 266} 267 268Klass* Management::com_sun_management_GcInfo_klass(TRAPS) { 269 if (_gcInfo_klass == NULL) { 270 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); 271 } 272 return _gcInfo_klass; 273} 274 275Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) { 276 if (_diagnosticCommandImpl_klass == NULL) { 277 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL); 278 } 279 return _diagnosticCommandImpl_klass; 280} 281 282Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) { 283 if (_managementFactoryHelper_klass == NULL) { 284 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL); 285 } 286 return _managementFactoryHelper_klass; 287} 288 289static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { 290 Handle snapshot_thread(THREAD, snapshot->threadObj()); 291 292 jlong contended_time; 293 jlong waited_time; 294 if (ThreadService::is_thread_monitoring_contention()) { 295 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); 296 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); 297 } else { 298 // set them to -1 if thread contention monitoring is disabled. 299 contended_time = max_julong; 300 waited_time = max_julong; 301 } 302 303 int thread_status = snapshot->thread_status(); 304 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); 305 if (snapshot->is_ext_suspended()) { 306 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; 307 } 308 if (snapshot->is_in_native()) { 309 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; 310 } 311 312 ThreadStackTrace* st = snapshot->get_stack_trace(); 313 Handle stacktrace_h; 314 if (st != NULL) { 315 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); 316 } else { 317 stacktrace_h = Handle(); 318 } 319 320 args->push_oop(snapshot_thread); 321 args->push_int(thread_status); 322 args->push_oop(Handle(THREAD, snapshot->blocker_object())); 323 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); 324 args->push_long(snapshot->contended_enter_count()); 325 args->push_long(contended_time); 326 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); 327 args->push_long(waited_time); 328 args->push_oop(stacktrace_h); 329} 330 331// Helper function to construct a ThreadInfo object 332instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { 333 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 334 instanceKlassHandle ik (THREAD, k); 335 336 JavaValue result(T_VOID); 337 JavaCallArguments args(14); 338 339 // First allocate a ThreadObj object and 340 // push the receiver as the first argument 341 Handle element = ik->allocate_instance_handle(CHECK_NULL); 342 args.push_oop(element); 343 344 // initialize the arguments for the ThreadInfo constructor 345 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 346 347 // Call ThreadInfo constructor with no locked monitors and synchronizers 348 JavaCalls::call_special(&result, 349 ik, 350 vmSymbols::object_initializer_name(), 351 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), 352 &args, 353 CHECK_NULL); 354 355 return (instanceOop) element(); 356} 357 358instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, 359 objArrayHandle monitors_array, 360 typeArrayHandle depths_array, 361 objArrayHandle synchronizers_array, 362 TRAPS) { 363 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 364 instanceKlassHandle ik (THREAD, k); 365 366 JavaValue result(T_VOID); 367 JavaCallArguments args(17); 368 369 // First allocate a ThreadObj object and 370 // push the receiver as the first argument 371 Handle element = ik->allocate_instance_handle(CHECK_NULL); 372 args.push_oop(element); 373 374 // initialize the arguments for the ThreadInfo constructor 375 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); 376 377 // push the locked monitors and synchronizers in the arguments 378 args.push_oop(monitors_array); 379 args.push_oop(depths_array); 380 args.push_oop(synchronizers_array); 381 382 // Call ThreadInfo constructor with locked monitors and synchronizers 383 JavaCalls::call_special(&result, 384 ik, 385 vmSymbols::object_initializer_name(), 386 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), 387 &args, 388 CHECK_NULL); 389 390 return (instanceOop) element(); 391} 392 393// Helper functions 394static JavaThread* find_java_thread_from_id(jlong thread_id) { 395 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); 396 397 JavaThread* java_thread = NULL; 398 // Sequential search for now. Need to do better optimization later. 399 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { 400 oop tobj = thread->threadObj(); 401 if (!thread->is_exiting() && 402 tobj != NULL && 403 thread_id == java_lang_Thread::thread_id(tobj)) { 404 java_thread = thread; 405 break; 406 } 407 } 408 return java_thread; 409} 410 411static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { 412 if (mgr == NULL) { 413 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 414 } 415 oop mgr_obj = JNIHandles::resolve(mgr); 416 instanceHandle h(THREAD, (instanceOop) mgr_obj); 417 418 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); 419 if (!h->is_a(k)) { 420 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 421 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", 422 NULL); 423 } 424 425 MemoryManager* gc = MemoryService::get_memory_manager(h); 426 if (gc == NULL || !gc->is_gc_memory_manager()) { 427 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 428 "Invalid GC memory manager", 429 NULL); 430 } 431 return (GCMemoryManager*) gc; 432} 433 434static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { 435 if (obj == NULL) { 436 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 437 } 438 439 oop pool_obj = JNIHandles::resolve(obj); 440 assert(pool_obj->is_instance(), "Should be an instanceOop"); 441 instanceHandle ph(THREAD, (instanceOop) pool_obj); 442 443 return MemoryService::get_memory_pool(ph); 444} 445 446static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { 447 int num_threads = ids_ah->length(); 448 449 // Validate input thread IDs 450 int i = 0; 451 for (i = 0; i < num_threads; i++) { 452 jlong tid = ids_ah->long_at(i); 453 if (tid <= 0) { 454 // throw exception if invalid thread id. 455 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 456 "Invalid thread ID entry"); 457 } 458 } 459} 460 461static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { 462 // check if the element of infoArray is of type ThreadInfo class 463 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); 464 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass(); 465 if (element_klass != threadinfo_klass) { 466 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 467 "infoArray element type is not ThreadInfo class"); 468 } 469} 470 471 472static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { 473 if (obj == NULL) { 474 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 475 } 476 477 oop mgr_obj = JNIHandles::resolve(obj); 478 assert(mgr_obj->is_instance(), "Should be an instanceOop"); 479 instanceHandle mh(THREAD, (instanceOop) mgr_obj); 480 481 return MemoryService::get_memory_manager(mh); 482} 483 484// Returns a version string and sets major and minor version if 485// the input parameters are non-null. 486JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) 487 return JMM_VERSION; 488JVM_END 489 490// Gets the list of VM monitoring and management optional supports 491// Returns 0 if succeeded; otherwise returns non-zero. 492JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) 493 if (support == NULL) { 494 return -1; 495 } 496 Management::get_optional_support(support); 497 return 0; 498JVM_END 499 500// Returns a java.lang.String object containing the input arguments to the VM. 501JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) 502 ResourceMark rm(THREAD); 503 504 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 505 return NULL; 506 } 507 508 char** vm_flags = Arguments::jvm_flags_array(); 509 char** vm_args = Arguments::jvm_args_array(); 510 int num_flags = Arguments::num_jvm_flags(); 511 int num_args = Arguments::num_jvm_args(); 512 513 size_t length = 1; // null terminator 514 int i; 515 for (i = 0; i < num_flags; i++) { 516 length += strlen(vm_flags[i]); 517 } 518 for (i = 0; i < num_args; i++) { 519 length += strlen(vm_args[i]); 520 } 521 // add a space between each argument 522 length += num_flags + num_args - 1; 523 524 // Return the list of input arguments passed to the VM 525 // and preserve the order that the VM processes. 526 char* args = NEW_RESOURCE_ARRAY(char, length); 527 args[0] = '\0'; 528 // concatenate all jvm_flags 529 if (num_flags > 0) { 530 strcat(args, vm_flags[0]); 531 for (i = 1; i < num_flags; i++) { 532 strcat(args, " "); 533 strcat(args, vm_flags[i]); 534 } 535 } 536 537 if (num_args > 0 && num_flags > 0) { 538 // append a space if args already contains one or more jvm_flags 539 strcat(args, " "); 540 } 541 542 // concatenate all jvm_args 543 if (num_args > 0) { 544 strcat(args, vm_args[0]); 545 for (i = 1; i < num_args; i++) { 546 strcat(args, " "); 547 strcat(args, vm_args[i]); 548 } 549 } 550 551 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); 552 return JNIHandles::make_local(env, hargs()); 553JVM_END 554 555// Returns an array of java.lang.String object containing the input arguments to the VM. 556JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) 557 ResourceMark rm(THREAD); 558 559 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 560 return NULL; 561 } 562 563 char** vm_flags = Arguments::jvm_flags_array(); 564 char** vm_args = Arguments::jvm_args_array(); 565 int num_flags = Arguments::num_jvm_flags(); 566 int num_args = Arguments::num_jvm_args(); 567 568 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); 569 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); 570 objArrayHandle result_h(THREAD, r); 571 572 int index = 0; 573 for (int j = 0; j < num_flags; j++, index++) { 574 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 575 result_h->obj_at_put(index, h()); 576 } 577 for (int i = 0; i < num_args; i++, index++) { 578 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 579 result_h->obj_at_put(index, h()); 580 } 581 return (jobjectArray) JNIHandles::make_local(env, result_h()); 582JVM_END 583 584// Returns an array of java/lang/management/MemoryPoolMXBean object 585// one for each memory pool if obj == null; otherwise returns 586// an array of memory pools for a given memory manager if 587// it is a valid memory manager. 588JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) 589 ResourceMark rm(THREAD); 590 591 int num_memory_pools; 592 MemoryManager* mgr = NULL; 593 if (obj == NULL) { 594 num_memory_pools = MemoryService::num_memory_pools(); 595 } else { 596 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); 597 if (mgr == NULL) { 598 return NULL; 599 } 600 num_memory_pools = mgr->num_memory_pools(); 601 } 602 603 // Allocate the resulting MemoryPoolMXBean[] object 604 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); 605 instanceKlassHandle ik (THREAD, k); 606 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); 607 objArrayHandle poolArray(THREAD, r); 608 609 if (mgr == NULL) { 610 // Get all memory pools 611 for (int i = 0; i < num_memory_pools; i++) { 612 MemoryPool* pool = MemoryService::get_memory_pool(i); 613 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 614 instanceHandle ph(THREAD, p); 615 poolArray->obj_at_put(i, ph()); 616 } 617 } else { 618 // Get memory pools managed by a given memory manager 619 for (int i = 0; i < num_memory_pools; i++) { 620 MemoryPool* pool = mgr->get_memory_pool(i); 621 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); 622 instanceHandle ph(THREAD, p); 623 poolArray->obj_at_put(i, ph()); 624 } 625 } 626 return (jobjectArray) JNIHandles::make_local(env, poolArray()); 627JVM_END 628 629// Returns an array of java/lang/management/MemoryManagerMXBean object 630// one for each memory manager if obj == null; otherwise returns 631// an array of memory managers for a given memory pool if 632// it is a valid memory pool. 633JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) 634 ResourceMark rm(THREAD); 635 636 int num_mgrs; 637 MemoryPool* pool = NULL; 638 if (obj == NULL) { 639 num_mgrs = MemoryService::num_memory_managers(); 640 } else { 641 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 642 if (pool == NULL) { 643 return NULL; 644 } 645 num_mgrs = pool->num_memory_managers(); 646 } 647 648 // Allocate the resulting MemoryManagerMXBean[] object 649 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); 650 instanceKlassHandle ik (THREAD, k); 651 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); 652 objArrayHandle mgrArray(THREAD, r); 653 654 if (pool == NULL) { 655 // Get all memory managers 656 for (int i = 0; i < num_mgrs; i++) { 657 MemoryManager* mgr = MemoryService::get_memory_manager(i); 658 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 659 instanceHandle ph(THREAD, p); 660 mgrArray->obj_at_put(i, ph()); 661 } 662 } else { 663 // Get memory managers for a given memory pool 664 for (int i = 0; i < num_mgrs; i++) { 665 MemoryManager* mgr = pool->get_memory_manager(i); 666 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); 667 instanceHandle ph(THREAD, p); 668 mgrArray->obj_at_put(i, ph()); 669 } 670 } 671 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); 672JVM_END 673 674 675// Returns a java/lang/management/MemoryUsage object containing the memory usage 676// of a given memory pool. 677JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) 678 ResourceMark rm(THREAD); 679 680 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 681 if (pool != NULL) { 682 MemoryUsage usage = pool->get_memory_usage(); 683 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 684 return JNIHandles::make_local(env, h()); 685 } else { 686 return NULL; 687 } 688JVM_END 689 690// Returns a java/lang/management/MemoryUsage object containing the memory usage 691// of a given memory pool. 692JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) 693 ResourceMark rm(THREAD); 694 695 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 696 if (pool != NULL) { 697 MemoryUsage usage = pool->get_peak_memory_usage(); 698 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 699 return JNIHandles::make_local(env, h()); 700 } else { 701 return NULL; 702 } 703JVM_END 704 705// Returns a java/lang/management/MemoryUsage object containing the memory usage 706// of a given memory pool after most recent GC. 707JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) 708 ResourceMark rm(THREAD); 709 710 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); 711 if (pool != NULL && pool->is_collected_pool()) { 712 MemoryUsage usage = pool->get_last_collection_usage(); 713 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 714 return JNIHandles::make_local(env, h()); 715 } else { 716 return NULL; 717 } 718JVM_END 719 720// Sets the memory pool sensor for a threshold type 721JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) 722 if (obj == NULL || sensorObj == NULL) { 723 THROW(vmSymbols::java_lang_NullPointerException()); 724 } 725 726 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK); 727 oop s = JNIHandles::resolve(sensorObj); 728 assert(s->is_instance(), "Sensor should be an instanceOop"); 729 instanceHandle sensor_h(THREAD, (instanceOop) s); 730 if (!sensor_h->is_a(sensor_klass)) { 731 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 732 "Sensor is not an instance of sun.management.Sensor class"); 733 } 734 735 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); 736 assert(mpool != NULL, "MemoryPool should exist"); 737 738 switch (type) { 739 case JMM_USAGE_THRESHOLD_HIGH: 740 case JMM_USAGE_THRESHOLD_LOW: 741 // have only one sensor for threshold high and low 742 mpool->set_usage_sensor_obj(sensor_h); 743 break; 744 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 745 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 746 // have only one sensor for threshold high and low 747 mpool->set_gc_usage_sensor_obj(sensor_h); 748 break; 749 default: 750 assert(false, "Unrecognized type"); 751 } 752 753JVM_END 754 755 756// Sets the threshold of a given memory pool. 757// Returns the previous threshold. 758// 759// Input parameters: 760// pool - the MemoryPoolMXBean object 761// type - threshold type 762// threshold - the new threshold (must not be negative) 763// 764JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) 765 if (threshold < 0) { 766 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 767 "Invalid threshold value", 768 -1); 769 } 770 771 if ((size_t)threshold > max_uintx) { 772 stringStream st; 773 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); 774 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); 775 } 776 777 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); 778 assert(pool != NULL, "MemoryPool should exist"); 779 780 jlong prev = 0; 781 switch (type) { 782 case JMM_USAGE_THRESHOLD_HIGH: 783 if (!pool->usage_threshold()->is_high_threshold_supported()) { 784 return -1; 785 } 786 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); 787 break; 788 789 case JMM_USAGE_THRESHOLD_LOW: 790 if (!pool->usage_threshold()->is_low_threshold_supported()) { 791 return -1; 792 } 793 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); 794 break; 795 796 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: 797 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { 798 return -1; 799 } 800 // return and the new threshold is effective for the next GC 801 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); 802 803 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: 804 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { 805 return -1; 806 } 807 // return and the new threshold is effective for the next GC 808 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); 809 810 default: 811 assert(false, "Unrecognized type"); 812 return -1; 813 } 814 815 // When the threshold is changed, reevaluate if the low memory 816 // detection is enabled. 817 if (prev != threshold) { 818 LowMemoryDetector::recompute_enabled_for_collected_pools(); 819 LowMemoryDetector::detect_low_memory(pool); 820 } 821 return prev; 822JVM_END 823 824// Gets an array containing the amount of memory allocated on the Java 825// heap for a set of threads (in bytes). Each element of the array is 826// the amount of memory allocated for the thread ID specified in the 827// corresponding entry in the given array of thread IDs; or -1 if the 828// thread does not exist or has terminated. 829JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, 830 jlongArray sizeArray)) 831 // Check if threads is null 832 if (ids == NULL || sizeArray == NULL) { 833 THROW(vmSymbols::java_lang_NullPointerException()); 834 } 835 836 ResourceMark rm(THREAD); 837 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 838 typeArrayHandle ids_ah(THREAD, ta); 839 840 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); 841 typeArrayHandle sizeArray_h(THREAD, sa); 842 843 // validate the thread id array 844 validate_thread_id_array(ids_ah, CHECK); 845 846 // sizeArray must be of the same length as the given array of thread IDs 847 int num_threads = ids_ah->length(); 848 if (num_threads != sizeArray_h->length()) { 849 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 850 "The length of the given long array does not match the length of " 851 "the given array of thread IDs"); 852 } 853 854 MutexLockerEx ml(Threads_lock); 855 for (int i = 0; i < num_threads; i++) { 856 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 857 if (java_thread != NULL) { 858 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); 859 } 860 } 861JVM_END 862 863// Returns a java/lang/management/MemoryUsage object representing 864// the memory usage for the heap or non-heap memory. 865JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) 866 ResourceMark rm(THREAD); 867 868 // Calculate the memory usage 869 size_t total_init = 0; 870 size_t total_used = 0; 871 size_t total_committed = 0; 872 size_t total_max = 0; 873 bool has_undefined_init_size = false; 874 bool has_undefined_max_size = false; 875 876 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 877 MemoryPool* pool = MemoryService::get_memory_pool(i); 878 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { 879 MemoryUsage u = pool->get_memory_usage(); 880 total_used += u.used(); 881 total_committed += u.committed(); 882 883 if (u.init_size() == (size_t)-1) { 884 has_undefined_init_size = true; 885 } 886 if (!has_undefined_init_size) { 887 total_init += u.init_size(); 888 } 889 890 if (u.max_size() == (size_t)-1) { 891 has_undefined_max_size = true; 892 } 893 if (!has_undefined_max_size) { 894 total_max += u.max_size(); 895 } 896 } 897 } 898 899 // if any one of the memory pool has undefined init_size or max_size, 900 // set it to -1 901 if (has_undefined_init_size) { 902 total_init = (size_t)-1; 903 } 904 if (has_undefined_max_size) { 905 total_max = (size_t)-1; 906 } 907 908 MemoryUsage usage((heap ? InitialHeapSize : total_init), 909 total_used, 910 total_committed, 911 (heap ? Universe::heap()->max_capacity() : total_max)); 912 913 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 914 return JNIHandles::make_local(env, obj()); 915JVM_END 916 917// Returns the boolean value of a given attribute. 918JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) 919 switch (att) { 920 case JMM_VERBOSE_GC: 921 return MemoryService::get_verbose(); 922 case JMM_VERBOSE_CLASS: 923 return ClassLoadingService::get_verbose(); 924 case JMM_THREAD_CONTENTION_MONITORING: 925 return ThreadService::is_thread_monitoring_contention(); 926 case JMM_THREAD_CPU_TIME: 927 return ThreadService::is_thread_cpu_time_enabled(); 928 case JMM_THREAD_ALLOCATED_MEMORY: 929 return ThreadService::is_thread_allocated_memory_enabled(); 930 default: 931 assert(0, "Unrecognized attribute"); 932 return false; 933 } 934JVM_END 935 936// Sets the given boolean attribute and returns the previous value. 937JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) 938 switch (att) { 939 case JMM_VERBOSE_GC: 940 return MemoryService::set_verbose(flag != 0); 941 case JMM_VERBOSE_CLASS: 942 return ClassLoadingService::set_verbose(flag != 0); 943 case JMM_THREAD_CONTENTION_MONITORING: 944 return ThreadService::set_thread_monitoring_contention(flag != 0); 945 case JMM_THREAD_CPU_TIME: 946 return ThreadService::set_thread_cpu_time_enabled(flag != 0); 947 case JMM_THREAD_ALLOCATED_MEMORY: 948 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); 949 default: 950 assert(0, "Unrecognized attribute"); 951 return false; 952 } 953JVM_END 954 955 956static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { 957 switch (att) { 958 case JMM_GC_TIME_MS: 959 return mgr->gc_time_ms(); 960 961 case JMM_GC_COUNT: 962 return mgr->gc_count(); 963 964 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: 965 // current implementation only has 1 ext attribute 966 return 1; 967 968 default: 969 assert(0, "Unrecognized GC attribute"); 970 return -1; 971 } 972} 973 974class VmThreadCountClosure: public ThreadClosure { 975 private: 976 int _count; 977 public: 978 VmThreadCountClosure() : _count(0) {}; 979 void do_thread(Thread* thread); 980 int count() { return _count; } 981}; 982 983void VmThreadCountClosure::do_thread(Thread* thread) { 984 // exclude externally visible JavaThreads 985 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 986 return; 987 } 988 989 _count++; 990} 991 992static jint get_vm_thread_count() { 993 VmThreadCountClosure vmtcc; 994 { 995 MutexLockerEx ml(Threads_lock); 996 Threads::threads_do(&vmtcc); 997 } 998 999 return vmtcc.count(); 1000} 1001 1002static jint get_num_flags() { 1003 // last flag entry is always NULL, so subtract 1 1004 int nFlags = (int) Flag::numFlags - 1; 1005 int count = 0; 1006 for (int i = 0; i < nFlags; i++) { 1007 Flag* flag = &Flag::flags[i]; 1008 // Exclude the locked (diagnostic, experimental) flags 1009 if (flag->is_unlocked() || flag->is_unlocker()) { 1010 count++; 1011 } 1012 } 1013 return count; 1014} 1015 1016static jlong get_long_attribute(jmmLongAttribute att) { 1017 switch (att) { 1018 case JMM_CLASS_LOADED_COUNT: 1019 return ClassLoadingService::loaded_class_count(); 1020 1021 case JMM_CLASS_UNLOADED_COUNT: 1022 return ClassLoadingService::unloaded_class_count(); 1023 1024 case JMM_THREAD_TOTAL_COUNT: 1025 return ThreadService::get_total_thread_count(); 1026 1027 case JMM_THREAD_LIVE_COUNT: 1028 return ThreadService::get_live_thread_count(); 1029 1030 case JMM_THREAD_PEAK_COUNT: 1031 return ThreadService::get_peak_thread_count(); 1032 1033 case JMM_THREAD_DAEMON_COUNT: 1034 return ThreadService::get_daemon_thread_count(); 1035 1036 case JMM_JVM_INIT_DONE_TIME_MS: 1037 return Management::vm_init_done_time(); 1038 1039 case JMM_JVM_UPTIME_MS: 1040 return Management::ticks_to_ms(os::elapsed_counter()); 1041 1042 case JMM_COMPILE_TOTAL_TIME_MS: 1043 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); 1044 1045 case JMM_OS_PROCESS_ID: 1046 return os::current_process_id(); 1047 1048 // Hotspot-specific counters 1049 case JMM_CLASS_LOADED_BYTES: 1050 return ClassLoadingService::loaded_class_bytes(); 1051 1052 case JMM_CLASS_UNLOADED_BYTES: 1053 return ClassLoadingService::unloaded_class_bytes(); 1054 1055 case JMM_SHARED_CLASS_LOADED_COUNT: 1056 return ClassLoadingService::loaded_shared_class_count(); 1057 1058 case JMM_SHARED_CLASS_UNLOADED_COUNT: 1059 return ClassLoadingService::unloaded_shared_class_count(); 1060 1061 1062 case JMM_SHARED_CLASS_LOADED_BYTES: 1063 return ClassLoadingService::loaded_shared_class_bytes(); 1064 1065 case JMM_SHARED_CLASS_UNLOADED_BYTES: 1066 return ClassLoadingService::unloaded_shared_class_bytes(); 1067 1068 case JMM_TOTAL_CLASSLOAD_TIME_MS: 1069 return ClassLoader::classloader_time_ms(); 1070 1071 case JMM_VM_GLOBAL_COUNT: 1072 return get_num_flags(); 1073 1074 case JMM_SAFEPOINT_COUNT: 1075 return RuntimeService::safepoint_count(); 1076 1077 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: 1078 return RuntimeService::safepoint_sync_time_ms(); 1079 1080 case JMM_TOTAL_STOPPED_TIME_MS: 1081 return RuntimeService::safepoint_time_ms(); 1082 1083 case JMM_TOTAL_APP_TIME_MS: 1084 return RuntimeService::application_time_ms(); 1085 1086 case JMM_VM_THREAD_COUNT: 1087 return get_vm_thread_count(); 1088 1089 case JMM_CLASS_INIT_TOTAL_COUNT: 1090 return ClassLoader::class_init_count(); 1091 1092 case JMM_CLASS_INIT_TOTAL_TIME_MS: 1093 return ClassLoader::class_init_time_ms(); 1094 1095 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: 1096 return ClassLoader::class_verify_time_ms(); 1097 1098 case JMM_METHOD_DATA_SIZE_BYTES: 1099 return ClassLoadingService::class_method_data_size(); 1100 1101 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: 1102 return os::physical_memory(); 1103 1104 default: 1105 return -1; 1106 } 1107} 1108 1109 1110// Returns the long value of a given attribute. 1111JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) 1112 if (obj == NULL) { 1113 return get_long_attribute(att); 1114 } else { 1115 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); 1116 if (mgr != NULL) { 1117 return get_gc_attribute(mgr, att); 1118 } 1119 } 1120 return -1; 1121JVM_END 1122 1123// Gets the value of all attributes specified in the given array 1124// and sets the value in the result array. 1125// Returns the number of attributes found. 1126JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, 1127 jobject obj, 1128 jmmLongAttribute* atts, 1129 jint count, 1130 jlong* result)) 1131 1132 int num_atts = 0; 1133 if (obj == NULL) { 1134 for (int i = 0; i < count; i++) { 1135 result[i] = get_long_attribute(atts[i]); 1136 if (result[i] != -1) { 1137 num_atts++; 1138 } 1139 } 1140 } else { 1141 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); 1142 for (int i = 0; i < count; i++) { 1143 result[i] = get_gc_attribute(mgr, atts[i]); 1144 if (result[i] != -1) { 1145 num_atts++; 1146 } 1147 } 1148 } 1149 return num_atts; 1150JVM_END 1151 1152// Helper function to do thread dump for a specific list of threads 1153static void do_thread_dump(ThreadDumpResult* dump_result, 1154 typeArrayHandle ids_ah, // array of thread ID (long[]) 1155 int num_threads, 1156 int max_depth, 1157 bool with_locked_monitors, 1158 bool with_locked_synchronizers, 1159 TRAPS) { 1160 1161 // First get an array of threadObj handles. 1162 // A JavaThread may terminate before we get the stack trace. 1163 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 1164 { 1165 MutexLockerEx ml(Threads_lock); 1166 for (int i = 0; i < num_threads; i++) { 1167 jlong tid = ids_ah->long_at(i); 1168 JavaThread* jt = find_java_thread_from_id(tid); 1169 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); 1170 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); 1171 thread_handle_array->append(threadObj_h); 1172 } 1173 } 1174 1175 // Obtain thread dumps and thread snapshot information 1176 VM_ThreadDump op(dump_result, 1177 thread_handle_array, 1178 num_threads, 1179 max_depth, /* stack depth */ 1180 with_locked_monitors, 1181 with_locked_synchronizers); 1182 VMThread::execute(&op); 1183} 1184 1185// Gets an array of ThreadInfo objects. Each element is the ThreadInfo 1186// for the thread ID specified in the corresponding entry in 1187// the given array of thread IDs; or NULL if the thread does not exist 1188// or has terminated. 1189// 1190// Input parameters: 1191// ids - array of thread IDs 1192// maxDepth - the maximum depth of stack traces to be dumped: 1193// maxDepth == -1 requests to dump entire stack trace. 1194// maxDepth == 0 requests no stack trace. 1195// infoArray - array of ThreadInfo objects 1196// 1197// QQQ - Why does this method return a value instead of void? 1198JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) 1199 // Check if threads is null 1200 if (ids == NULL || infoArray == NULL) { 1201 THROW_(vmSymbols::java_lang_NullPointerException(), -1); 1202 } 1203 1204 if (maxDepth < -1) { 1205 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1206 "Invalid maxDepth", -1); 1207 } 1208 1209 ResourceMark rm(THREAD); 1210 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1211 typeArrayHandle ids_ah(THREAD, ta); 1212 1213 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); 1214 objArrayOop oa = objArrayOop(infoArray_obj); 1215 objArrayHandle infoArray_h(THREAD, oa); 1216 1217 // validate the thread id array 1218 validate_thread_id_array(ids_ah, CHECK_0); 1219 1220 // validate the ThreadInfo[] parameters 1221 validate_thread_info_array(infoArray_h, CHECK_0); 1222 1223 // infoArray must be of the same length as the given array of thread IDs 1224 int num_threads = ids_ah->length(); 1225 if (num_threads != infoArray_h->length()) { 1226 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1227 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); 1228 } 1229 1230 if (JDK_Version::is_gte_jdk16x_version()) { 1231 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1232 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); 1233 } 1234 1235 // Must use ThreadDumpResult to store the ThreadSnapshot. 1236 // GC may occur after the thread snapshots are taken but before 1237 // this function returns. The threadObj and other oops kept 1238 // in the ThreadSnapshot are marked and adjusted during GC. 1239 ThreadDumpResult dump_result(num_threads); 1240 1241 if (maxDepth == 0) { 1242 // no stack trace dumped - do not need to stop the world 1243 { 1244 MutexLockerEx ml(Threads_lock); 1245 for (int i = 0; i < num_threads; i++) { 1246 jlong tid = ids_ah->long_at(i); 1247 JavaThread* jt = find_java_thread_from_id(tid); 1248 ThreadSnapshot* ts; 1249 if (jt == NULL) { 1250 // if the thread does not exist or now it is terminated, 1251 // create dummy snapshot 1252 ts = new ThreadSnapshot(); 1253 } else { 1254 ts = new ThreadSnapshot(jt); 1255 } 1256 dump_result.add_thread_snapshot(ts); 1257 } 1258 } 1259 } else { 1260 // obtain thread dump with the specific list of threads with stack trace 1261 do_thread_dump(&dump_result, 1262 ids_ah, 1263 num_threads, 1264 maxDepth, 1265 false, /* no locked monitor */ 1266 false, /* no locked synchronizers */ 1267 CHECK_0); 1268 } 1269 1270 int num_snapshots = dump_result.num_snapshots(); 1271 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); 1272 int index = 0; 1273 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { 1274 // For each thread, create an java/lang/management/ThreadInfo object 1275 // and fill with the thread information 1276 1277 if (ts->threadObj() == NULL) { 1278 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1279 infoArray_h->obj_at_put(index, NULL); 1280 continue; 1281 } 1282 1283 // Create java.lang.management.ThreadInfo object 1284 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); 1285 infoArray_h->obj_at_put(index, info_obj); 1286 } 1287 return 0; 1288JVM_END 1289 1290// Dump thread info for the specified threads. 1291// It returns an array of ThreadInfo objects. Each element is the ThreadInfo 1292// for the thread ID specified in the corresponding entry in 1293// the given array of thread IDs; or NULL if the thread does not exist 1294// or has terminated. 1295// 1296// Input parameter: 1297// ids - array of thread IDs; NULL indicates all live threads 1298// locked_monitors - if true, dump locked object monitors 1299// locked_synchronizers - if true, dump locked JSR-166 synchronizers 1300// 1301JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) 1302 ResourceMark rm(THREAD); 1303 1304 if (JDK_Version::is_gte_jdk16x_version()) { 1305 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots 1306 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); 1307 } 1308 1309 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); 1310 int num_threads = (ta != NULL ? ta->length() : 0); 1311 typeArrayHandle ids_ah(THREAD, ta); 1312 1313 ThreadDumpResult dump_result(num_threads); // can safepoint 1314 1315 if (ids_ah() != NULL) { 1316 1317 // validate the thread id array 1318 validate_thread_id_array(ids_ah, CHECK_NULL); 1319 1320 // obtain thread dump of a specific list of threads 1321 do_thread_dump(&dump_result, 1322 ids_ah, 1323 num_threads, 1324 -1, /* entire stack */ 1325 (locked_monitors ? true : false), /* with locked monitors */ 1326 (locked_synchronizers ? true : false), /* with locked synchronizers */ 1327 CHECK_NULL); 1328 } else { 1329 // obtain thread dump of all threads 1330 VM_ThreadDump op(&dump_result, 1331 -1, /* entire stack */ 1332 (locked_monitors ? true : false), /* with locked monitors */ 1333 (locked_synchronizers ? true : false) /* with locked synchronizers */); 1334 VMThread::execute(&op); 1335 } 1336 1337 int num_snapshots = dump_result.num_snapshots(); 1338 1339 // create the result ThreadInfo[] object 1340 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); 1341 instanceKlassHandle ik (THREAD, k); 1342 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); 1343 objArrayHandle result_h(THREAD, r); 1344 1345 int index = 0; 1346 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { 1347 if (ts->threadObj() == NULL) { 1348 // if the thread does not exist or now it is terminated, set threadinfo to NULL 1349 result_h->obj_at_put(index, NULL); 1350 continue; 1351 } 1352 1353 ThreadStackTrace* stacktrace = ts->get_stack_trace(); 1354 assert(stacktrace != NULL, "Must have a stack trace dumped"); 1355 1356 // Create Object[] filled with locked monitors 1357 // Create int[] filled with the stack depth where a monitor was locked 1358 int num_frames = stacktrace->get_stack_depth(); 1359 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); 1360 1361 // Count the total number of locked monitors 1362 for (int i = 0; i < num_frames; i++) { 1363 StackFrameInfo* frame = stacktrace->stack_frame_at(i); 1364 num_locked_monitors += frame->num_locked_monitors(); 1365 } 1366 1367 objArrayHandle monitors_array; 1368 typeArrayHandle depths_array; 1369 objArrayHandle synchronizers_array; 1370 1371 if (locked_monitors) { 1372 // Constructs Object[] and int[] to contain the object monitor and the stack depth 1373 // where the thread locked it 1374 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); 1375 objArrayHandle mh(THREAD, array); 1376 monitors_array = mh; 1377 1378 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); 1379 typeArrayHandle dh(THREAD, tarray); 1380 depths_array = dh; 1381 1382 int count = 0; 1383 int j = 0; 1384 for (int depth = 0; depth < num_frames; depth++) { 1385 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); 1386 int len = frame->num_locked_monitors(); 1387 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); 1388 for (j = 0; j < len; j++) { 1389 oop monitor = locked_monitors->at(j); 1390 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); 1391 monitors_array->obj_at_put(count, monitor); 1392 depths_array->int_at_put(count, depth); 1393 count++; 1394 } 1395 } 1396 1397 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); 1398 for (j = 0; j < jni_locked_monitors->length(); j++) { 1399 oop object = jni_locked_monitors->at(j); 1400 assert(object != NULL && object->is_instance(), "must be a Java object"); 1401 monitors_array->obj_at_put(count, object); 1402 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info 1403 depths_array->int_at_put(count, -1); 1404 count++; 1405 } 1406 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); 1407 } 1408 1409 if (locked_synchronizers) { 1410 // Create Object[] filled with locked JSR-166 synchronizers 1411 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); 1412 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); 1413 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); 1414 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); 1415 1416 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); 1417 objArrayHandle sh(THREAD, array); 1418 synchronizers_array = sh; 1419 1420 for (int k = 0; k < num_locked_synchronizers; k++) { 1421 synchronizers_array->obj_at_put(k, locks->at(k)); 1422 } 1423 } 1424 1425 // Create java.lang.management.ThreadInfo object 1426 instanceOop info_obj = Management::create_thread_info_instance(ts, 1427 monitors_array, 1428 depths_array, 1429 synchronizers_array, 1430 CHECK_NULL); 1431 result_h->obj_at_put(index, info_obj); 1432 } 1433 1434 return (jobjectArray) JNIHandles::make_local(env, result_h()); 1435JVM_END 1436 1437// Returns an array of Class objects. 1438JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) 1439 ResourceMark rm(THREAD); 1440 1441 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter 1442 1443 int num_classes = lce.num_loaded_classes(); 1444 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); 1445 objArrayHandle classes_ah(THREAD, r); 1446 1447 for (int i = 0; i < num_classes; i++) { 1448 KlassHandle kh = lce.get_klass(i); 1449 oop mirror = kh()->java_mirror(); 1450 classes_ah->obj_at_put(i, mirror); 1451 } 1452 1453 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); 1454JVM_END 1455 1456// Reset statistic. Return true if the requested statistic is reset. 1457// Otherwise, return false. 1458// 1459// Input parameters: 1460// obj - specify which instance the statistic associated with to be reset 1461// For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. 1462// For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. 1463// type - the type of statistic to be reset 1464// 1465JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) 1466 ResourceMark rm(THREAD); 1467 1468 switch (type) { 1469 case JMM_STAT_PEAK_THREAD_COUNT: 1470 ThreadService::reset_peak_thread_count(); 1471 return true; 1472 1473 case JMM_STAT_THREAD_CONTENTION_COUNT: 1474 case JMM_STAT_THREAD_CONTENTION_TIME: { 1475 jlong tid = obj.j; 1476 if (tid < 0) { 1477 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); 1478 } 1479 1480 // Look for the JavaThread of this given tid 1481 MutexLockerEx ml(Threads_lock); 1482 if (tid == 0) { 1483 // reset contention statistics for all threads if tid == 0 1484 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { 1485 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1486 ThreadService::reset_contention_count_stat(java_thread); 1487 } else { 1488 ThreadService::reset_contention_time_stat(java_thread); 1489 } 1490 } 1491 } else { 1492 // reset contention statistics for a given thread 1493 JavaThread* java_thread = find_java_thread_from_id(tid); 1494 if (java_thread == NULL) { 1495 return false; 1496 } 1497 1498 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { 1499 ThreadService::reset_contention_count_stat(java_thread); 1500 } else { 1501 ThreadService::reset_contention_time_stat(java_thread); 1502 } 1503 } 1504 return true; 1505 break; 1506 } 1507 case JMM_STAT_PEAK_POOL_USAGE: { 1508 jobject o = obj.l; 1509 if (o == NULL) { 1510 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1511 } 1512 1513 oop pool_obj = JNIHandles::resolve(o); 1514 assert(pool_obj->is_instance(), "Should be an instanceOop"); 1515 instanceHandle ph(THREAD, (instanceOop) pool_obj); 1516 1517 MemoryPool* pool = MemoryService::get_memory_pool(ph); 1518 if (pool != NULL) { 1519 pool->reset_peak_memory_usage(); 1520 return true; 1521 } 1522 break; 1523 } 1524 case JMM_STAT_GC_STAT: { 1525 jobject o = obj.l; 1526 if (o == NULL) { 1527 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 1528 } 1529 1530 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); 1531 if (mgr != NULL) { 1532 mgr->reset_gc_stat(); 1533 return true; 1534 } 1535 break; 1536 } 1537 default: 1538 assert(0, "Unknown Statistic Type"); 1539 } 1540 return false; 1541JVM_END 1542 1543// Returns the fast estimate of CPU time consumed by 1544// a given thread (in nanoseconds). 1545// If thread_id == 0, return CPU time for the current thread. 1546JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) 1547 if (!os::is_thread_cpu_time_supported()) { 1548 return -1; 1549 } 1550 1551 if (thread_id < 0) { 1552 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1553 "Invalid thread ID", -1); 1554 } 1555 1556 JavaThread* java_thread = NULL; 1557 if (thread_id == 0) { 1558 // current thread 1559 return os::current_thread_cpu_time(); 1560 } else { 1561 MutexLockerEx ml(Threads_lock); 1562 java_thread = find_java_thread_from_id(thread_id); 1563 if (java_thread != NULL) { 1564 return os::thread_cpu_time((Thread*) java_thread); 1565 } 1566 } 1567 return -1; 1568JVM_END 1569 1570// Returns the CPU time consumed by a given thread (in nanoseconds). 1571// If thread_id == 0, CPU time for the current thread is returned. 1572// If user_sys_cpu_time = true, user level and system CPU time of 1573// a given thread is returned; otherwise, only user level CPU time 1574// is returned. 1575JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) 1576 if (!os::is_thread_cpu_time_supported()) { 1577 return -1; 1578 } 1579 1580 if (thread_id < 0) { 1581 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1582 "Invalid thread ID", -1); 1583 } 1584 1585 JavaThread* java_thread = NULL; 1586 if (thread_id == 0) { 1587 // current thread 1588 return os::current_thread_cpu_time(user_sys_cpu_time != 0); 1589 } else { 1590 MutexLockerEx ml(Threads_lock); 1591 java_thread = find_java_thread_from_id(thread_id); 1592 if (java_thread != NULL) { 1593 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); 1594 } 1595 } 1596 return -1; 1597JVM_END 1598 1599// Gets an array containing the CPU times consumed by a set of threads 1600// (in nanoseconds). Each element of the array is the CPU time for the 1601// thread ID specified in the corresponding entry in the given array 1602// of thread IDs; or -1 if the thread does not exist or has terminated. 1603// If user_sys_cpu_time = true, the sum of user level and system CPU time 1604// for the given thread is returned; otherwise, only user level CPU time 1605// is returned. 1606JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, 1607 jlongArray timeArray, 1608 jboolean user_sys_cpu_time)) 1609 // Check if threads is null 1610 if (ids == NULL || timeArray == NULL) { 1611 THROW(vmSymbols::java_lang_NullPointerException()); 1612 } 1613 1614 ResourceMark rm(THREAD); 1615 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); 1616 typeArrayHandle ids_ah(THREAD, ta); 1617 1618 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); 1619 typeArrayHandle timeArray_h(THREAD, tia); 1620 1621 // validate the thread id array 1622 validate_thread_id_array(ids_ah, CHECK); 1623 1624 // timeArray must be of the same length as the given array of thread IDs 1625 int num_threads = ids_ah->length(); 1626 if (num_threads != timeArray_h->length()) { 1627 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1628 "The length of the given long array does not match the length of " 1629 "the given array of thread IDs"); 1630 } 1631 1632 MutexLockerEx ml(Threads_lock); 1633 for (int i = 0; i < num_threads; i++) { 1634 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); 1635 if (java_thread != NULL) { 1636 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, 1637 user_sys_cpu_time != 0)); 1638 } 1639 } 1640JVM_END 1641 1642// Returns a String array of all VM global flag names 1643JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) 1644 // last flag entry is always NULL, so subtract 1 1645 int nFlags = (int) Flag::numFlags - 1; 1646 // allocate a temp array 1647 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1648 nFlags, CHECK_0); 1649 objArrayHandle flags_ah(THREAD, r); 1650 int num_entries = 0; 1651 for (int i = 0; i < nFlags; i++) { 1652 Flag* flag = &Flag::flags[i]; 1653 // Exclude notproduct and develop flags in product builds. 1654 if (flag->is_constant_in_binary()) { 1655 continue; 1656 } 1657 // Exclude the locked (experimental, diagnostic) flags 1658 if (flag->is_unlocked() || flag->is_unlocker()) { 1659 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0); 1660 flags_ah->obj_at_put(num_entries, s()); 1661 num_entries++; 1662 } 1663 } 1664 1665 if (num_entries < nFlags) { 1666 // Return array of right length 1667 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); 1668 for(int i = 0; i < num_entries; i++) { 1669 res->obj_at_put(i, flags_ah->obj_at(i)); 1670 } 1671 return (jobjectArray)JNIHandles::make_local(env, res); 1672 } 1673 1674 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); 1675JVM_END 1676 1677// Utility function used by jmm_GetVMGlobals. Returns false if flag type 1678// can't be determined, true otherwise. If false is returned, then *global 1679// will be incomplete and invalid. 1680bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { 1681 Handle flag_name; 1682 if (name() == NULL) { 1683 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false); 1684 } else { 1685 flag_name = name; 1686 } 1687 global->name = (jstring)JNIHandles::make_local(env, flag_name()); 1688 1689 if (flag->is_bool()) { 1690 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; 1691 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; 1692 } else if (flag->is_intx()) { 1693 global->value.j = (jlong)flag->get_intx(); 1694 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1695 } else if (flag->is_uintx()) { 1696 global->value.j = (jlong)flag->get_uintx(); 1697 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1698 } else if (flag->is_uint64_t()) { 1699 global->value.j = (jlong)flag->get_uint64_t(); 1700 global->type = JMM_VMGLOBAL_TYPE_JLONG; 1701 } else if (flag->is_ccstr()) { 1702 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); 1703 global->value.l = (jobject)JNIHandles::make_local(env, str()); 1704 global->type = JMM_VMGLOBAL_TYPE_JSTRING; 1705 } else { 1706 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; 1707 return false; 1708 } 1709 1710 global->writeable = flag->is_writeable(); 1711 global->external = flag->is_external(); 1712 switch (flag->get_origin()) { 1713 case Flag::DEFAULT: 1714 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; 1715 break; 1716 case Flag::COMMAND_LINE: 1717 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; 1718 break; 1719 case Flag::ENVIRON_VAR: 1720 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; 1721 break; 1722 case Flag::CONFIG_FILE: 1723 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; 1724 break; 1725 case Flag::MANAGEMENT: 1726 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; 1727 break; 1728 case Flag::ERGONOMIC: 1729 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; 1730 break; 1731 case Flag::ATTACH_ON_DEMAND: 1732 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND; 1733 break; 1734 default: 1735 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; 1736 } 1737 1738 return true; 1739} 1740 1741// Fill globals array of count length with jmmVMGlobal entries 1742// specified by names. If names == NULL, fill globals array 1743// with all Flags. Return value is number of entries 1744// created in globals. 1745// If a Flag with a given name in an array element does not 1746// exist, globals[i].name will be set to NULL. 1747JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, 1748 jobjectArray names, 1749 jmmVMGlobal *globals, 1750 jint count)) 1751 1752 1753 if (globals == NULL) { 1754 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1755 } 1756 1757 ResourceMark rm(THREAD); 1758 1759 if (names != NULL) { 1760 // return the requested globals 1761 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); 1762 objArrayHandle names_ah(THREAD, ta); 1763 // Make sure we have a String array 1764 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1765 if (element_klass != SystemDictionary::String_klass()) { 1766 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1767 "Array element type is not String class", 0); 1768 } 1769 1770 int names_length = names_ah->length(); 1771 int num_entries = 0; 1772 for (int i = 0; i < names_length && i < count; i++) { 1773 oop s = names_ah->obj_at(i); 1774 if (s == NULL) { 1775 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1776 } 1777 1778 Handle sh(THREAD, s); 1779 char* str = java_lang_String::as_utf8_string(s); 1780 Flag* flag = Flag::find_flag(str, strlen(str)); 1781 if (flag != NULL && 1782 add_global_entry(env, sh, &globals[i], flag, THREAD)) { 1783 num_entries++; 1784 } else { 1785 globals[i].name = NULL; 1786 } 1787 } 1788 return num_entries; 1789 } else { 1790 // return all globals if names == NULL 1791 1792 // last flag entry is always NULL, so subtract 1 1793 int nFlags = (int) Flag::numFlags - 1; 1794 Handle null_h; 1795 int num_entries = 0; 1796 for (int i = 0; i < nFlags && num_entries < count; i++) { 1797 Flag* flag = &Flag::flags[i]; 1798 // Exclude notproduct and develop flags in product builds. 1799 if (flag->is_constant_in_binary()) { 1800 continue; 1801 } 1802 // Exclude the locked (diagnostic, experimental) flags 1803 if ((flag->is_unlocked() || flag->is_unlocker()) && 1804 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { 1805 num_entries++; 1806 } 1807 } 1808 return num_entries; 1809 } 1810JVM_END 1811 1812JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) 1813 ResourceMark rm(THREAD); 1814 1815 oop fn = JNIHandles::resolve_external_guard(flag_name); 1816 if (fn == NULL) { 1817 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 1818 "The flag name cannot be null."); 1819 } 1820 char* name = java_lang_String::as_utf8_string(fn); 1821 Flag* flag = Flag::find_flag(name, strlen(name)); 1822 if (flag == NULL) { 1823 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1824 "Flag does not exist."); 1825 } 1826 if (!flag->is_writeable()) { 1827 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 1828 "This flag is not writeable."); 1829 } 1830 1831 bool succeed = false; 1832 if (flag->is_bool()) { 1833 bool bvalue = (new_value.z == JNI_TRUE ? true : false); 1834 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT); 1835 } else if (flag->is_intx()) { 1836 intx ivalue = (intx)new_value.j; 1837 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT); 1838 } else if (flag->is_uintx()) { 1839 uintx uvalue = (uintx)new_value.j; 1840 1841 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) { 1842 FormatBuffer<80> err_msg(""); 1843 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) { 1844 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer()); 1845 } 1846 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) { 1847 FormatBuffer<80> err_msg(""); 1848 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) { 1849 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer()); 1850 } 1851 } 1852 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT); 1853 } else if (flag->is_uint64_t()) { 1854 uint64_t uvalue = (uint64_t)new_value.j; 1855 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT); 1856 } else if (flag->is_ccstr()) { 1857 oop str = JNIHandles::resolve_external_guard(new_value.l); 1858 if (str == NULL) { 1859 THROW(vmSymbols::java_lang_NullPointerException()); 1860 } 1861 ccstr svalue = java_lang_String::as_utf8_string(str); 1862 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT); 1863 if (succeed) { 1864 FREE_C_HEAP_ARRAY(char, svalue, mtInternal); 1865 } 1866 } 1867 assert(succeed, "Setting flag should succeed"); 1868JVM_END 1869 1870class ThreadTimesClosure: public ThreadClosure { 1871 private: 1872 objArrayHandle _names_strings; 1873 char **_names_chars; 1874 typeArrayHandle _times; 1875 int _names_len; 1876 int _times_len; 1877 int _count; 1878 1879 public: 1880 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times); 1881 ~ThreadTimesClosure(); 1882 virtual void do_thread(Thread* thread); 1883 void do_unlocked(); 1884 int count() { return _count; } 1885}; 1886 1887ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names, 1888 typeArrayHandle times) { 1889 assert(names() != NULL, "names was NULL"); 1890 assert(times() != NULL, "times was NULL"); 1891 _names_strings = names; 1892 _names_len = names->length(); 1893 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal); 1894 _times = times; 1895 _times_len = times->length(); 1896 _count = 0; 1897} 1898 1899// 1900// Called with Threads_lock held 1901// 1902void ThreadTimesClosure::do_thread(Thread* thread) { 1903 assert(thread != NULL, "thread was NULL"); 1904 1905 // exclude externally visible JavaThreads 1906 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { 1907 return; 1908 } 1909 1910 if (_count >= _names_len || _count >= _times_len) { 1911 // skip if the result array is not big enough 1912 return; 1913 } 1914 1915 EXCEPTION_MARK; 1916 ResourceMark rm(THREAD); // thread->name() uses ResourceArea 1917 1918 assert(thread->name() != NULL, "All threads should have a name"); 1919 _names_chars[_count] = strdup(thread->name()); 1920 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? 1921 os::thread_cpu_time(thread) : -1); 1922 _count++; 1923} 1924 1925// Called without Threads_lock, we can allocate String objects. 1926void ThreadTimesClosure::do_unlocked() { 1927 1928 EXCEPTION_MARK; 1929 for (int i = 0; i < _count; i++) { 1930 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK); 1931 _names_strings->obj_at_put(i, s()); 1932 } 1933} 1934 1935ThreadTimesClosure::~ThreadTimesClosure() { 1936 for (int i = 0; i < _count; i++) { 1937 free(_names_chars[i]); 1938 } 1939 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal); 1940} 1941 1942// Fills names with VM internal thread names and times with the corresponding 1943// CPU times. If names or times is NULL, a NullPointerException is thrown. 1944// If the element type of names is not String, an IllegalArgumentException is 1945// thrown. 1946// If an array is not large enough to hold all the entries, only the entries 1947// that fit will be returned. Return value is the number of VM internal 1948// threads entries. 1949JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, 1950 jobjectArray names, 1951 jlongArray times)) 1952 if (names == NULL || times == NULL) { 1953 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 1954 } 1955 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); 1956 objArrayHandle names_ah(THREAD, na); 1957 1958 // Make sure we have a String array 1959 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass(); 1960 if (element_klass != SystemDictionary::String_klass()) { 1961 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 1962 "Array element type is not String class", 0); 1963 } 1964 1965 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); 1966 typeArrayHandle times_ah(THREAD, ta); 1967 1968 ThreadTimesClosure ttc(names_ah, times_ah); 1969 { 1970 MutexLockerEx ml(Threads_lock); 1971 Threads::threads_do(&ttc); 1972 } 1973 ttc.do_unlocked(); 1974 return ttc.count(); 1975JVM_END 1976 1977static Handle find_deadlocks(bool object_monitors_only, TRAPS) { 1978 ResourceMark rm(THREAD); 1979 1980 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); 1981 VMThread::execute(&op); 1982 1983 DeadlockCycle* deadlocks = op.result(); 1984 if (deadlocks == NULL) { 1985 // no deadlock found and return 1986 return Handle(); 1987 } 1988 1989 int num_threads = 0; 1990 DeadlockCycle* cycle; 1991 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 1992 num_threads += cycle->num_threads(); 1993 } 1994 1995 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); 1996 objArrayHandle threads_ah(THREAD, r); 1997 1998 int index = 0; 1999 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { 2000 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); 2001 int len = deadlock_threads->length(); 2002 for (int i = 0; i < len; i++) { 2003 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); 2004 index++; 2005 } 2006 } 2007 return threads_ah; 2008} 2009 2010// Finds cycles of threads that are deadlocked involved in object monitors 2011// and JSR-166 synchronizers. 2012// Returns an array of Thread objects which are in deadlock, if any. 2013// Otherwise, returns NULL. 2014// 2015// Input parameter: 2016// object_monitors_only - if true, only check object monitors 2017// 2018JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) 2019 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); 2020 return (jobjectArray) JNIHandles::make_local(env, result()); 2021JVM_END 2022 2023// Finds cycles of threads that are deadlocked on monitor locks 2024// Returns an array of Thread objects which are in deadlock, if any. 2025// Otherwise, returns NULL. 2026JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) 2027 Handle result = find_deadlocks(true, CHECK_0); 2028 return (jobjectArray) JNIHandles::make_local(env, result()); 2029JVM_END 2030 2031// Gets the information about GC extension attributes including 2032// the name of the attribute, its type, and a short description. 2033// 2034// Input parameters: 2035// mgr - GC memory manager 2036// info - caller allocated array of jmmExtAttributeInfo 2037// count - number of elements of the info array 2038// 2039// Returns the number of GC extension attributes filled in the info array; or 2040// -1 if info is not big enough 2041// 2042JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) 2043 // All GC memory managers have 1 attribute (number of GC threads) 2044 if (count == 0) { 2045 return 0; 2046 } 2047 2048 if (info == NULL) { 2049 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2050 } 2051 2052 info[0].name = "GcThreadCount"; 2053 info[0].type = 'I'; 2054 info[0].description = "Number of GC threads"; 2055 return 1; 2056JVM_END 2057 2058// verify the given array is an array of java/lang/management/MemoryUsage objects 2059// of a given length and return the objArrayOop 2060static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { 2061 if (array == NULL) { 2062 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 2063 } 2064 2065 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); 2066 objArrayHandle array_h(THREAD, oa); 2067 2068 // array must be of the given length 2069 if (length != array_h->length()) { 2070 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2071 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); 2072 } 2073 2074 // check if the element of array is of type MemoryUsage class 2075 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); 2076 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass(); 2077 if (element_klass != usage_klass) { 2078 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), 2079 "The element type is not MemoryUsage class", 0); 2080 } 2081 2082 return array_h(); 2083} 2084 2085// Gets the statistics of the last GC of a given GC memory manager. 2086// Input parameters: 2087// obj - GarbageCollectorMXBean object 2088// gc_stat - caller allocated jmmGCStat where: 2089// a. before_gc_usage - array of MemoryUsage objects 2090// b. after_gc_usage - array of MemoryUsage objects 2091// c. gc_ext_attributes_values_size is set to the 2092// gc_ext_attribute_values array allocated 2093// d. gc_ext_attribute_values is a caller allocated array of jvalue. 2094// 2095// On return, 2096// gc_index == 0 indicates no GC statistics available 2097// 2098// before_gc_usage and after_gc_usage - filled with per memory pool 2099// before and after GC usage in the same order as the memory pools 2100// returned by GetMemoryPools for a given GC memory manager. 2101// num_gc_ext_attributes indicates the number of elements in 2102// the gc_ext_attribute_values array is filled; or 2103// -1 if the gc_ext_attributes_values array is not big enough 2104// 2105JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) 2106 ResourceMark rm(THREAD); 2107 2108 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { 2109 THROW(vmSymbols::java_lang_NullPointerException()); 2110 } 2111 2112 // Get the GCMemoryManager 2113 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2114 2115 // Make a copy of the last GC statistics 2116 // GC may occur while constructing the last GC information 2117 int num_pools = MemoryService::num_memory_pools(); 2118 GCStatInfo stat(num_pools); 2119 if (mgr->get_last_gc_stat(&stat) == 0) { 2120 gc_stat->gc_index = 0; 2121 return; 2122 } 2123 2124 gc_stat->gc_index = stat.gc_index(); 2125 gc_stat->start_time = Management::ticks_to_ms(stat.start_time()); 2126 gc_stat->end_time = Management::ticks_to_ms(stat.end_time()); 2127 2128 // Current implementation does not have GC extension attributes 2129 gc_stat->num_gc_ext_attributes = 0; 2130 2131 // Fill the arrays of MemoryUsage objects with before and after GC 2132 // per pool memory usage 2133 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, 2134 num_pools, 2135 CHECK); 2136 objArrayHandle usage_before_gc_ah(THREAD, bu); 2137 2138 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, 2139 num_pools, 2140 CHECK); 2141 objArrayHandle usage_after_gc_ah(THREAD, au); 2142 2143 for (int i = 0; i < num_pools; i++) { 2144 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK); 2145 Handle after_usage; 2146 2147 MemoryUsage u = stat.after_gc_usage_for_pool(i); 2148 if (u.max_size() == 0 && u.used() > 0) { 2149 // If max size == 0, this pool is a survivor space. 2150 // Set max size = -1 since the pools will be swapped after GC. 2151 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); 2152 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); 2153 } else { 2154 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK); 2155 } 2156 usage_before_gc_ah->obj_at_put(i, before_usage()); 2157 usage_after_gc_ah->obj_at_put(i, after_usage()); 2158 } 2159 2160 if (gc_stat->gc_ext_attribute_values_size > 0) { 2161 // Current implementation only has 1 attribute (number of GC threads) 2162 // The type is 'I' 2163 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); 2164 } 2165JVM_END 2166 2167JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) 2168 ResourceMark rm(THREAD); 2169 // Get the GCMemoryManager 2170 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); 2171 mgr->set_notification_enabled(enabled?true:false); 2172JVM_END 2173 2174// Dump heap - Returns 0 if succeeds. 2175JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) 2176#if INCLUDE_SERVICES 2177 ResourceMark rm(THREAD); 2178 oop on = JNIHandles::resolve_external_guard(outputfile); 2179 if (on == NULL) { 2180 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2181 "Output file name cannot be null.", -1); 2182 } 2183 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1)); 2184 if (name == NULL) { 2185 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), 2186 "Output file name cannot be null.", -1); 2187 } 2188 HeapDumper dumper(live ? true : false); 2189 if (dumper.dump(name) != 0) { 2190 const char* errmsg = dumper.error_as_C_string(); 2191 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); 2192 } 2193 return 0; 2194#else // INCLUDE_SERVICES 2195 return -1; 2196#endif // INCLUDE_SERVICES 2197JVM_END 2198 2199JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env)) 2200 ResourceMark rm(THREAD); 2201 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean); 2202 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(), 2203 dcmd_list->length(), CHECK_NULL); 2204 objArrayHandle cmd_array(THREAD, cmd_array_oop); 2205 for (int i = 0; i < dcmd_list->length(); i++) { 2206 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL); 2207 cmd_array->obj_at_put(i, cmd_name); 2208 } 2209 return (jobjectArray) JNIHandles::make_local(env, cmd_array()); 2210JVM_END 2211 2212JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds, 2213 dcmdInfo* infoArray)) 2214 if (cmds == NULL || infoArray == NULL) { 2215 THROW(vmSymbols::java_lang_NullPointerException()); 2216 } 2217 2218 ResourceMark rm(THREAD); 2219 2220 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds)); 2221 objArrayHandle cmds_ah(THREAD, ca); 2222 2223 // Make sure we have a String array 2224 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass(); 2225 if (element_klass != SystemDictionary::String_klass()) { 2226 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2227 "Array element type is not String class"); 2228 } 2229 2230 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean); 2231 2232 int num_cmds = cmds_ah->length(); 2233 for (int i = 0; i < num_cmds; i++) { 2234 oop cmd = cmds_ah->obj_at(i); 2235 if (cmd == NULL) { 2236 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2237 "Command name cannot be null."); 2238 } 2239 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2240 if (cmd_name == NULL) { 2241 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2242 "Command name cannot be null."); 2243 } 2244 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name); 2245 if (pos == -1) { 2246 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2247 "Unknown diagnostic command"); 2248 } 2249 DCmdInfo* info = info_list->at(pos); 2250 infoArray[i].name = info->name(); 2251 infoArray[i].description = info->description(); 2252 infoArray[i].impact = info->impact(); 2253 JavaPermission p = info->permission(); 2254 infoArray[i].permission_class = p._class; 2255 infoArray[i].permission_name = p._name; 2256 infoArray[i].permission_action = p._action; 2257 infoArray[i].num_arguments = info->num_arguments(); 2258 infoArray[i].enabled = info->is_enabled(); 2259 } 2260JVM_END 2261 2262JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env, 2263 jstring command, dcmdArgInfo* infoArray)) 2264 ResourceMark rm(THREAD); 2265 oop cmd = JNIHandles::resolve_external_guard(command); 2266 if (cmd == NULL) { 2267 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2268 "Command line cannot be null."); 2269 } 2270 char* cmd_name = java_lang_String::as_utf8_string(cmd); 2271 if (cmd_name == NULL) { 2272 THROW_MSG(vmSymbols::java_lang_NullPointerException(), 2273 "Command line content cannot be null."); 2274 } 2275 DCmd* dcmd = NULL; 2276 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name, 2277 strlen(cmd_name)); 2278 if (factory != NULL) { 2279 dcmd = factory->create_resource_instance(NULL); 2280 } 2281 if (dcmd == NULL) { 2282 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), 2283 "Unknown diagnostic command"); 2284 } 2285 DCmdMark mark(dcmd); 2286 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array(); 2287 if (array->length() == 0) { 2288 return; 2289 } 2290 for (int i = 0; i < array->length(); i++) { 2291 infoArray[i].name = array->at(i)->name(); 2292 infoArray[i].description = array->at(i)->description(); 2293 infoArray[i].type = array->at(i)->type(); 2294 infoArray[i].default_string = array->at(i)->default_string(); 2295 infoArray[i].mandatory = array->at(i)->is_mandatory(); 2296 infoArray[i].option = array->at(i)->is_option(); 2297 infoArray[i].multiple = array->at(i)->is_multiple(); 2298 infoArray[i].position = array->at(i)->position(); 2299 } 2300 return; 2301JVM_END 2302 2303JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline)) 2304 ResourceMark rm(THREAD); 2305 oop cmd = JNIHandles::resolve_external_guard(commandline); 2306 if (cmd == NULL) { 2307 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2308 "Command line cannot be null."); 2309 } 2310 char* cmdline = java_lang_String::as_utf8_string(cmd); 2311 if (cmdline == NULL) { 2312 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 2313 "Command line content cannot be null."); 2314 } 2315 bufferedStream output; 2316 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL); 2317 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL); 2318 return (jstring) JNIHandles::make_local(env, result); 2319JVM_END 2320 2321JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled)) 2322 DCmdFactory::set_jmx_notification_enabled(enabled?true:false); 2323JVM_END 2324 2325jlong Management::ticks_to_ms(jlong ticks) { 2326 assert(os::elapsed_frequency() > 0, "Must be non-zero"); 2327 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) 2328 * (double)1000.0); 2329} 2330 2331const struct jmmInterface_1_ jmm_interface = { 2332 NULL, 2333 NULL, 2334 jmm_GetVersion, 2335 jmm_GetOptionalSupport, 2336 jmm_GetInputArguments, 2337 jmm_GetThreadInfo, 2338 jmm_GetInputArgumentArray, 2339 jmm_GetMemoryPools, 2340 jmm_GetMemoryManagers, 2341 jmm_GetMemoryPoolUsage, 2342 jmm_GetPeakMemoryPoolUsage, 2343 jmm_GetThreadAllocatedMemory, 2344 jmm_GetMemoryUsage, 2345 jmm_GetLongAttribute, 2346 jmm_GetBoolAttribute, 2347 jmm_SetBoolAttribute, 2348 jmm_GetLongAttributes, 2349 jmm_FindMonitorDeadlockedThreads, 2350 jmm_GetThreadCpuTime, 2351 jmm_GetVMGlobalNames, 2352 jmm_GetVMGlobals, 2353 jmm_GetInternalThreadTimes, 2354 jmm_ResetStatistic, 2355 jmm_SetPoolSensor, 2356 jmm_SetPoolThreshold, 2357 jmm_GetPoolCollectionUsage, 2358 jmm_GetGCExtAttributeInfo, 2359 jmm_GetLastGCStat, 2360 jmm_GetThreadCpuTimeWithKind, 2361 jmm_GetThreadCpuTimesWithKind, 2362 jmm_DumpHeap0, 2363 jmm_FindDeadlockedThreads, 2364 jmm_SetVMGlobal, 2365 NULL, 2366 jmm_DumpThreads, 2367 jmm_SetGCNotificationEnabled, 2368 jmm_GetDiagnosticCommands, 2369 jmm_GetDiagnosticCommandInfo, 2370 jmm_GetDiagnosticCommandArgumentsInfo, 2371 jmm_ExecuteDiagnosticCommand, 2372 jmm_SetDiagnosticFrameworkNotificationEnabled 2373}; 2374#endif // INCLUDE_MANAGEMENT 2375 2376void* Management::get_jmm_interface(int version) { 2377#if INCLUDE_MANAGEMENT 2378 if (version == JMM_VERSION_1_0) { 2379 return (void*) &jmm_interface; 2380 } 2381#endif // INCLUDE_MANAGEMENT 2382 return NULL; 2383} 2384