1 /*
2 * Copyright (c) 2003, 2025, 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 "classfile/classLoader.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "gc/shared/collectedHeap.hpp"
30 #include "jmm.h"
31 #include "memory/allocation.inline.hpp"
32 #include "memory/iterator.hpp"
33 #include "memory/oopFactory.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.hpp"
36 #include "oops/klass.hpp"
37 #include "oops/klass.inline.hpp"
38 #include "oops/objArrayKlass.hpp"
39 #include "oops/objArrayOop.inline.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "oops/oopHandle.inline.hpp"
42 #include "oops/typeArrayOop.inline.hpp"
43 #include "runtime/flags/jvmFlag.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.inline.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/jniHandles.inline.hpp"
49 #include "runtime/mutexLocker.hpp"
50 #include "runtime/notificationThread.hpp"
51 #include "runtime/os.hpp"
52 #include "runtime/thread.inline.hpp"
53 #include "runtime/threads.hpp"
54 #include "runtime/threadSMR.hpp"
55 #include "runtime/vmOperations.hpp"
56 #include "services/classLoadingService.hpp"
57 #include "services/diagnosticCommand.hpp"
58 #include "services/diagnosticFramework.hpp"
59 #include "services/finalizerService.hpp"
60 #include "services/writeableFlags.hpp"
61 #include "services/heapDumper.hpp"
62 #include "services/lowMemoryDetector.hpp"
63 #include "services/gcNotifier.hpp"
64 #include "services/management.hpp"
65 #include "services/memoryManager.hpp"
66 #include "services/memoryPool.hpp"
67 #include "services/memoryService.hpp"
68 #include "services/runtimeService.hpp"
69 #include "services/threadService.hpp"
70 #include "utilities/debug.hpp"
71 #include "utilities/formatBuffer.hpp"
72 #include "utilities/macros.hpp"
73
74 PerfVariable* Management::_begin_vm_creation_time = nullptr;
75 PerfVariable* Management::_end_vm_creation_time = nullptr;
76 PerfVariable* Management::_vm_init_done_time = nullptr;
77
78 InstanceKlass* Management::_diagnosticCommandImpl_klass = nullptr;
79 InstanceKlass* Management::_garbageCollectorExtImpl_klass = nullptr;
80 InstanceKlass* Management::_garbageCollectorMXBean_klass = nullptr;
81 InstanceKlass* Management::_gcInfo_klass = nullptr;
82 InstanceKlass* Management::_managementFactoryHelper_klass = nullptr;
83 InstanceKlass* Management::_memoryManagerMXBean_klass = nullptr;
84 InstanceKlass* Management::_memoryPoolMXBean_klass = nullptr;
85 InstanceKlass* Management::_memoryUsage_klass = nullptr;
86 InstanceKlass* Management::_sensor_klass = nullptr;
87 InstanceKlass* Management::_threadInfo_klass = nullptr;
88
89 jmmOptionalSupport Management::_optional_support = {0};
90 TimeStamp Management::_stamp;
91
92 void management_init() {
93 #if INCLUDE_MANAGEMENT
94 Management::init();
95 ThreadService::init();
96 RuntimeService::init();
97 ClassLoadingService::init();
98 FinalizerService::init();
99 #else
100 ThreadService::init();
101 #endif // INCLUDE_MANAGEMENT
102 }
103
104 #if INCLUDE_MANAGEMENT
105
106 void Management::init() {
107 EXCEPTION_MARK;
108
109 // These counters are for java.lang.management API support.
110 // They are created even if -XX:-UsePerfData is set and in
111 // that case, they will be allocated on C heap.
112
113 _begin_vm_creation_time =
114 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
115 PerfData::U_None, CHECK);
116
117 _end_vm_creation_time =
118 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
119 PerfData::U_None, CHECK);
120
121 _vm_init_done_time =
122 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
123 PerfData::U_None, CHECK);
124
125 // Initialize optional support
126 _optional_support.isLowMemoryDetectionSupported = 1;
127 _optional_support.isCompilationTimeMonitoringSupported = 1;
128 _optional_support.isThreadContentionMonitoringSupported = 1;
129
130 if (os::is_thread_cpu_time_supported()) {
131 _optional_support.isCurrentThreadCpuTimeSupported = 1;
132 _optional_support.isOtherThreadCpuTimeSupported = 1;
133 } else {
134 _optional_support.isCurrentThreadCpuTimeSupported = 0;
135 _optional_support.isOtherThreadCpuTimeSupported = 0;
136 }
137
138 _optional_support.isObjectMonitorUsageSupported = 1;
139 #if INCLUDE_SERVICES
140 // This depends on the heap inspector
141 _optional_support.isSynchronizerUsageSupported = 1;
142 #endif // INCLUDE_SERVICES
143 _optional_support.isThreadAllocatedMemorySupported = 1;
144 _optional_support.isRemoteDiagnosticCommandsSupported = 1;
145
146 // Registration of the diagnostic commands
147 DCmd::register_dcmds();
148 }
149
150 void Management::initialize(TRAPS) {
151 NotificationThread::initialize();
152
153 if (ManagementServer) {
154 ResourceMark rm(THREAD);
155 HandleMark hm(THREAD);
156
157 // Load and initialize the jdk.internal.agent.Agent class
158 // invoke startAgent method to start the management server
159 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
160 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::jdk_internal_agent_Agent(),
161 loader,
162 THREAD);
163 if (k == nullptr) {
164 vm_exit_during_initialization("Management agent initialization failure: "
165 "class jdk.internal.agent.Agent not found.");
166 }
167
168 JavaValue result(T_VOID);
169 JavaCalls::call_static(&result,
170 k,
171 vmSymbols::startAgent_name(),
172 vmSymbols::void_method_signature(),
173 CHECK);
174 }
175 }
176
177 void Management::get_optional_support(jmmOptionalSupport* support) {
178 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
179 }
180
181 InstanceKlass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
182 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
183 return initialize_klass(k, THREAD);
184 }
185
186 InstanceKlass* Management::load_and_initialize_klass_or_null(Symbol* sh, TRAPS) {
187 Klass* k = SystemDictionary::resolve_or_null(sh, CHECK_NULL);
188 if (k == nullptr) {
189 return nullptr;
190 }
191 return initialize_klass(k, THREAD);
192 }
193
194 InstanceKlass* Management::initialize_klass(Klass* k, TRAPS) {
195 InstanceKlass* ik = InstanceKlass::cast(k);
196 if (ik->should_be_initialized()) {
197 ik->initialize(CHECK_NULL);
198 }
199 // If these classes change to not be owned by the boot loader, they need
200 // to be walked to keep their class loader alive in oops_do.
201 assert(ik->class_loader() == nullptr, "need to follow in oops_do");
202 return ik;
203 }
204
205
206 void Management::record_vm_init_completed() {
207 // Initialize the timestamp to get the current time
208 _vm_init_done_time->set_value(os::javaTimeMillis());
209
210 // Update the timestamp to the vm init done time
211 _stamp.update();
212 }
213
214 void Management::record_vm_startup_time(jlong begin, jlong duration) {
215 // if the performance counter is not initialized,
216 // then vm initialization failed; simply return.
217 if (_begin_vm_creation_time == nullptr) return;
218
219 _begin_vm_creation_time->set_value(begin);
220 _end_vm_creation_time->set_value(begin + duration);
221 PerfMemory::set_accessible(true);
222 }
223
224 jlong Management::begin_vm_creation_time() {
225 return _begin_vm_creation_time->get_value();
226 }
227
228 jlong Management::vm_init_done_time() {
229 return _vm_init_done_time->get_value();
230 }
231
232 jlong Management::timestamp() {
233 TimeStamp t;
234 t.update();
235 return t.ticks() - _stamp.ticks();
236 }
237
238 InstanceKlass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
239 if (_threadInfo_klass == nullptr) {
240 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
241 }
242 return _threadInfo_klass;
243 }
244
245 InstanceKlass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
246 if (_memoryUsage_klass == nullptr) {
247 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
248 }
249 return _memoryUsage_klass;
250 }
251
252 InstanceKlass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
253 if (_memoryPoolMXBean_klass == nullptr) {
254 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
255 }
256 return _memoryPoolMXBean_klass;
257 }
258
259 InstanceKlass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
260 if (_memoryManagerMXBean_klass == nullptr) {
261 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
262 }
263 return _memoryManagerMXBean_klass;
264 }
265
266 InstanceKlass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
267 if (_garbageCollectorMXBean_klass == nullptr) {
268 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
269 }
270 return _garbageCollectorMXBean_klass;
271 }
272
273 InstanceKlass* Management::sun_management_Sensor_klass(TRAPS) {
274 if (_sensor_klass == nullptr) {
275 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
276 }
277 return _sensor_klass;
278 }
279
280 InstanceKlass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
281 if (_managementFactoryHelper_klass == nullptr) {
282 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
283 }
284 return _managementFactoryHelper_klass;
285 }
286
287 InstanceKlass* Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS) {
288 if (_garbageCollectorExtImpl_klass == nullptr) {
289 _garbageCollectorExtImpl_klass =
290 load_and_initialize_klass_or_null(vmSymbols::com_sun_management_internal_GarbageCollectorExtImpl(), CHECK_NULL);
291 }
292 return _garbageCollectorExtImpl_klass;
293 }
294
295 InstanceKlass* Management::com_sun_management_GcInfo_klass(TRAPS) {
296 if (_gcInfo_klass == nullptr) {
297 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
298 }
299 return _gcInfo_klass;
300 }
301
302 InstanceKlass* Management::com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS) {
303 if (_diagnosticCommandImpl_klass == nullptr) {
304 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_DiagnosticCommandImpl(), CHECK_NULL);
305 }
306 return _diagnosticCommandImpl_klass;
307 }
308
309 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
310 Handle snapshot_thread(THREAD, snapshot->threadObj());
311
312 jlong contended_time;
313 jlong waited_time;
314 if (ThreadService::is_thread_monitoring_contention()) {
315 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
316 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
317 } else {
318 // set them to -1 if thread contention monitoring is disabled.
319 contended_time = max_julong;
320 waited_time = max_julong;
321 }
322
323 int thread_status = static_cast<int>(snapshot->thread_status());
324 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
325 if (snapshot->is_suspended()) {
326 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
327 }
328 if (snapshot->is_in_native()) {
329 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
330 }
331
332 ThreadStackTrace* st = snapshot->get_stack_trace();
333 Handle stacktrace_h;
334 if (st != nullptr) {
335 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
336 } else {
337 stacktrace_h = Handle();
338 }
339
340 args->push_oop(snapshot_thread);
341 args->push_int(thread_status);
342 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
343 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
344 args->push_long(snapshot->contended_enter_count());
345 args->push_long(contended_time);
346 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
347 args->push_long(waited_time);
348 args->push_oop(stacktrace_h);
349 }
350
351 // Helper function to construct a ThreadInfo object
352 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
353 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
354 JavaCallArguments args(14);
355
356 // initialize the arguments for the ThreadInfo constructor
357 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
358
359 // Call ThreadInfo constructor with no locked monitors and synchronizers
360 Handle element = JavaCalls::construct_new_instance(
361 ik,
362 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
363 &args,
364 CHECK_NULL);
365 return (instanceOop) element();
366 }
367
368 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
369 objArrayHandle monitors_array,
370 typeArrayHandle depths_array,
371 objArrayHandle synchronizers_array,
372 TRAPS) {
373 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
374 JavaCallArguments args(17);
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 Handle element = JavaCalls::construct_new_instance(
386 ik,
387 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
388 &args,
389 CHECK_NULL);
390 return (instanceOop) element();
391 }
392
393
394 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
395 if (mgr == nullptr) {
396 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
397 }
398 oop mgr_obj = JNIHandles::resolve(mgr);
399 instanceHandle h(THREAD, (instanceOop) mgr_obj);
400
401 InstanceKlass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
402 if (!h->is_a(k)) {
403 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
404 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
405 nullptr);
406 }
407
408 MemoryManager* gc = MemoryService::get_memory_manager(h);
409 if (gc == nullptr || !gc->is_gc_memory_manager()) {
410 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
411 "Invalid GC memory manager",
412 nullptr);
413 }
414 return (GCMemoryManager*) gc;
415 }
416
417 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
418 if (obj == nullptr) {
419 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
420 }
421
422 oop pool_obj = JNIHandles::resolve(obj);
423 assert(pool_obj->is_instance(), "Should be an instanceOop");
424 instanceHandle ph(THREAD, (instanceOop) pool_obj);
425
426 return MemoryService::get_memory_pool(ph);
427 }
428
429 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
430 int num_threads = ids_ah->length();
431
432 // Validate input thread IDs
433 int i = 0;
434 for (i = 0; i < num_threads; i++) {
435 jlong tid = ids_ah->long_at(i);
436 if (tid <= 0) {
437 // throw exception if invalid thread id.
438 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
439 "Invalid thread ID entry");
440 }
441 }
442 }
443
444 // Returns true if the JavaThread's Java object is a platform thread
445 static bool is_platform_thread(JavaThread* jt) {
446 if (jt != nullptr) {
447 oop thread_obj = jt->threadObj();
448 return (thread_obj != nullptr) && !thread_obj->is_a(vmClasses::BoundVirtualThread_klass());
449 } else {
450 return false;
451 }
452 }
453
454 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
455 // check if the element of infoArray is of type ThreadInfo class
456 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
457 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
458 if (element_klass != threadinfo_klass) {
459 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
460 "infoArray element type is not ThreadInfo class");
461 }
462 }
463
464 // Returns true if the ThreadSnapshot's Java object is a platform thread
465 static bool is_platform_thread(ThreadSnapshot* ts) {
466 oop thread_obj = ts->threadObj();
467 return (thread_obj != nullptr) && !thread_obj->is_a(vmClasses::BoundVirtualThread_klass());
468 }
469
470 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
471 if (obj == nullptr) {
472 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
473 }
474
475 oop mgr_obj = JNIHandles::resolve(obj);
476 assert(mgr_obj->is_instance(), "Should be an instanceOop");
477 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
478
479 return MemoryService::get_memory_manager(mh);
480 }
481
482 // Returns a version string and sets major and minor version if
483 // the input parameters are non-null.
484 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
485 return JMM_VERSION;
486 JVM_END
487
488 // Gets the list of VM monitoring and management optional supports
489 // Returns 0 if succeeded; otherwise returns non-zero.
490 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
491 if (support == nullptr) {
492 return -1;
493 }
494 Management::get_optional_support(support);
495 return 0;
496 JVM_END
497
498 // Returns an array of java/lang/management/MemoryPoolMXBean object
499 // one for each memory pool if obj == null; otherwise returns
500 // an array of memory pools for a given memory manager if
501 // it is a valid memory manager.
502 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
503 ResourceMark rm(THREAD);
504
505 int num_memory_pools;
506 MemoryManager* mgr = nullptr;
507 if (obj == nullptr) {
508 num_memory_pools = MemoryService::num_memory_pools();
509 } else {
510 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
511 if (mgr == nullptr) {
512 return nullptr;
513 }
514 num_memory_pools = mgr->num_memory_pools();
515 }
516
517 // Allocate the resulting MemoryPoolMXBean[] object
518 InstanceKlass* ik = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
519 objArrayOop r = oopFactory::new_objArray(ik, num_memory_pools, CHECK_NULL);
520 objArrayHandle poolArray(THREAD, r);
521
522 if (mgr == nullptr) {
523 // Get all memory pools
524 for (int i = 0; i < num_memory_pools; i++) {
525 MemoryPool* pool = MemoryService::get_memory_pool(i);
526 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
527 instanceHandle ph(THREAD, p);
528 poolArray->obj_at_put(i, ph());
529 }
530 } else {
531 // Get memory pools managed by a given memory manager
532 for (int i = 0; i < num_memory_pools; i++) {
533 MemoryPool* pool = mgr->get_memory_pool(i);
534 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
535 instanceHandle ph(THREAD, p);
536 poolArray->obj_at_put(i, ph());
537 }
538 }
539 return (jobjectArray) JNIHandles::make_local(THREAD, poolArray());
540 JVM_END
541
542 // Returns an array of java/lang/management/MemoryManagerMXBean object
543 // one for each memory manager if obj == null; otherwise returns
544 // an array of memory managers for a given memory pool if
545 // it is a valid memory pool.
546 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
547 ResourceMark rm(THREAD);
548
549 int num_mgrs;
550 MemoryPool* pool = nullptr;
551 if (obj == nullptr) {
552 num_mgrs = MemoryService::num_memory_managers();
553 } else {
554 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
555 if (pool == nullptr) {
556 return nullptr;
557 }
558 num_mgrs = pool->num_memory_managers();
559 }
560
561 // Allocate the resulting MemoryManagerMXBean[] object
562 InstanceKlass* ik = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
563 objArrayOop r = oopFactory::new_objArray(ik, num_mgrs, CHECK_NULL);
564 objArrayHandle mgrArray(THREAD, r);
565
566 if (pool == nullptr) {
567 // Get all memory managers
568 for (int i = 0; i < num_mgrs; i++) {
569 MemoryManager* mgr = MemoryService::get_memory_manager(i);
570 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
571 instanceHandle ph(THREAD, p);
572 mgrArray->obj_at_put(i, ph());
573 }
574 } else {
575 // Get memory managers for a given memory pool
576 for (int i = 0; i < num_mgrs; i++) {
577 MemoryManager* mgr = pool->get_memory_manager(i);
578 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
579 instanceHandle ph(THREAD, p);
580 mgrArray->obj_at_put(i, ph());
581 }
582 }
583 return (jobjectArray) JNIHandles::make_local(THREAD, mgrArray());
584 JVM_END
585
586
587 // Returns a java/lang/management/MemoryUsage object containing the memory usage
588 // of a given memory pool.
589 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
590 ResourceMark rm(THREAD);
591
592 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
593 if (pool != nullptr) {
594 MemoryUsage usage = pool->get_memory_usage();
595 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
596 return JNIHandles::make_local(THREAD, h());
597 } else {
598 return nullptr;
599 }
600 JVM_END
601
602 // Returns a java/lang/management/MemoryUsage object containing the memory usage
603 // of a given memory pool.
604 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
605 ResourceMark rm(THREAD);
606
607 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
608 if (pool != nullptr) {
609 MemoryUsage usage = pool->get_peak_memory_usage();
610 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
611 return JNIHandles::make_local(THREAD, h());
612 } else {
613 return nullptr;
614 }
615 JVM_END
616
617 // Returns a java/lang/management/MemoryUsage object containing the memory usage
618 // of a given memory pool after most recent GC.
619 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
620 ResourceMark rm(THREAD);
621
622 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
623 if (pool != nullptr && pool->is_collected_pool()) {
624 MemoryUsage usage = pool->get_last_collection_usage();
625 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
626 return JNIHandles::make_local(THREAD, h());
627 } else {
628 return nullptr;
629 }
630 JVM_END
631
632 // Sets the memory pool sensor for a threshold type
633 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
634 if (obj == nullptr || sensorObj == nullptr) {
635 THROW(vmSymbols::java_lang_NullPointerException());
636 }
637
638 InstanceKlass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
639 oop s = JNIHandles::resolve(sensorObj);
640 assert(s->is_instance(), "Sensor should be an instanceOop");
641 instanceHandle sensor_h(THREAD, (instanceOop) s);
642 if (!sensor_h->is_a(sensor_klass)) {
643 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
644 "Sensor is not an instance of sun.management.Sensor class");
645 }
646
647 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
648 assert(mpool != nullptr, "MemoryPool should exist");
649
650 switch (type) {
651 case JMM_USAGE_THRESHOLD_HIGH:
652 case JMM_USAGE_THRESHOLD_LOW:
653 // have only one sensor for threshold high and low
654 mpool->set_usage_sensor_obj(sensor_h);
655 break;
656 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
657 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
658 // have only one sensor for threshold high and low
659 mpool->set_gc_usage_sensor_obj(sensor_h);
660 break;
661 default:
662 assert(false, "Unrecognized type");
663 }
664
665 JVM_END
666
667
668 // Sets the threshold of a given memory pool.
669 // Returns the previous threshold.
670 //
671 // Input parameters:
672 // pool - the MemoryPoolMXBean object
673 // type - threshold type
674 // threshold - the new threshold (must not be negative)
675 //
676 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
677 if (threshold < 0) {
678 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
679 "Invalid threshold value",
680 -1);
681 }
682
683 if ((size_t)threshold > max_uintx) {
684 stringStream st;
685 st.print("Invalid valid threshold value. Threshold value (" JLONG_FORMAT ") > max value of size_t (%zu)", threshold, max_uintx);
686 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
687 }
688
689 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
690 assert(pool != nullptr, "MemoryPool should exist");
691
692 jlong prev = 0;
693 switch (type) {
694 case JMM_USAGE_THRESHOLD_HIGH:
695 if (!pool->usage_threshold()->is_high_threshold_supported()) {
696 return -1;
697 }
698 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
699 break;
700
701 case JMM_USAGE_THRESHOLD_LOW:
702 if (!pool->usage_threshold()->is_low_threshold_supported()) {
703 return -1;
704 }
705 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
706 break;
707
708 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
709 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
710 return -1;
711 }
712 // return and the new threshold is effective for the next GC
713 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
714
715 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
716 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
717 return -1;
718 }
719 // return and the new threshold is effective for the next GC
720 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
721
722 default:
723 assert(false, "Unrecognized type");
724 return -1;
725 }
726
727 // When the threshold is changed, reevaluate if the low memory
728 // detection is enabled.
729 if (prev != threshold) {
730 LowMemoryDetector::recompute_enabled_for_collected_pools();
731 LowMemoryDetector::detect_low_memory(pool);
732 }
733 return prev;
734 JVM_END
735
736 // Returns a java/lang/management/MemoryUsage object representing
737 // the memory usage for the heap or non-heap memory.
738 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
739 ResourceMark rm(THREAD);
740
741 MemoryUsage usage;
742
743 if (heap) {
744 usage = Universe::heap()->memory_usage();
745 } else {
746 // Calculate the memory usage by summing up the pools.
747 size_t total_init = 0;
748 size_t total_used = 0;
749 size_t total_committed = 0;
750 size_t total_max = 0;
751 bool has_undefined_init_size = false;
752 bool has_undefined_max_size = false;
753
754 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
755 MemoryPool* pool = MemoryService::get_memory_pool(i);
756 if (pool->is_non_heap()) {
757 MemoryUsage u = pool->get_memory_usage();
758 total_used += u.used();
759 total_committed += u.committed();
760
761 if (u.init_size() == MemoryUsage::undefined_size()) {
762 has_undefined_init_size = true;
763 }
764 if (!has_undefined_init_size) {
765 total_init += u.init_size();
766 }
767
768 if (u.max_size() == MemoryUsage::undefined_size()) {
769 has_undefined_max_size = true;
770 }
771 if (!has_undefined_max_size) {
772 total_max += u.max_size();
773 }
774 }
775 }
776
777 // if any one of the memory pool has undefined init_size or max_size,
778 // set it to MemoryUsage::undefined_size()
779 if (has_undefined_init_size) {
780 total_init = MemoryUsage::undefined_size();
781 }
782 if (has_undefined_max_size) {
783 total_max = MemoryUsage::undefined_size();
784 }
785
786 usage = MemoryUsage(total_init, total_used, total_committed, total_max);
787 }
788
789 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
790 return JNIHandles::make_local(THREAD, obj());
791 JVM_END
792
793 // Returns the boolean value of a given attribute.
794 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
795 switch (att) {
796 case JMM_VERBOSE_GC:
797 return MemoryService::get_verbose();
798 case JMM_VERBOSE_CLASS:
799 return ClassLoadingService::get_verbose();
800 case JMM_THREAD_CONTENTION_MONITORING:
801 return ThreadService::is_thread_monitoring_contention();
802 case JMM_THREAD_CPU_TIME:
803 return ThreadService::is_thread_cpu_time_enabled();
804 case JMM_THREAD_ALLOCATED_MEMORY:
805 return ThreadService::is_thread_allocated_memory_enabled();
806 default:
807 assert(0, "Unrecognized attribute");
808 return false;
809 }
810 JVM_END
811
812 // Sets the given boolean attribute and returns the previous value.
813 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
814 switch (att) {
815 case JMM_VERBOSE_GC:
816 return MemoryService::set_verbose(flag != 0);
817 case JMM_VERBOSE_CLASS:
818 return ClassLoadingService::set_verbose(flag != 0);
819 case JMM_THREAD_CONTENTION_MONITORING:
820 return ThreadService::set_thread_monitoring_contention(flag != 0);
821 case JMM_THREAD_CPU_TIME:
822 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
823 case JMM_THREAD_ALLOCATED_MEMORY:
824 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
825 default:
826 assert(0, "Unrecognized attribute");
827 return false;
828 }
829 JVM_END
830
831
832 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
833 switch (att) {
834 case JMM_GC_TIME_MS:
835 return mgr->gc_time_ms();
836
837 case JMM_GC_COUNT:
838 return mgr->gc_count();
839
840 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
841 // current implementation only has 1 ext attribute
842 return 1;
843
844 default:
845 assert(0, "Unrecognized GC attribute");
846 return -1;
847 }
848 }
849
850 class VmThreadCountClosure: public ThreadClosure {
851 private:
852 int _count;
853 public:
854 VmThreadCountClosure() : _count(0) {};
855 void do_thread(Thread* thread);
856 int count() { return _count; }
857 };
858
859 void VmThreadCountClosure::do_thread(Thread* thread) {
860 // exclude externally visible JavaThreads
861 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
862 return;
863 }
864
865 _count++;
866 }
867
868 static jint get_vm_thread_count() {
869 VmThreadCountClosure vmtcc;
870 {
871 MutexLocker ml(Threads_lock);
872 Threads::threads_do(&vmtcc);
873 }
874
875 return vmtcc.count();
876 }
877
878 static jint get_num_flags() {
879 // last flag entry is always null, so subtract 1
880 int nFlags = (int) JVMFlag::numFlags - 1;
881 int count = 0;
882 for (int i = 0; i < nFlags; i++) {
883 JVMFlag* flag = &JVMFlag::flags[i];
884 // Exclude the locked (diagnostic, experimental) flags
885 if (flag->is_unlocked() || flag->is_unlocker()) {
886 count++;
887 }
888 }
889 return count;
890 }
891
892 static jlong get_long_attribute(jmmLongAttribute att) {
893 switch (att) {
894 case JMM_CLASS_LOADED_COUNT:
895 return ClassLoadingService::loaded_class_count();
896
897 case JMM_CLASS_UNLOADED_COUNT:
898 return ClassLoadingService::unloaded_class_count();
899
900 case JMM_THREAD_TOTAL_COUNT:
901 return ThreadService::get_total_thread_count();
902
903 case JMM_THREAD_LIVE_COUNT:
904 return ThreadService::get_live_thread_count();
905
906 case JMM_THREAD_PEAK_COUNT:
907 return ThreadService::get_peak_thread_count();
908
909 case JMM_THREAD_DAEMON_COUNT:
910 return ThreadService::get_daemon_thread_count();
911
912 case JMM_JVM_INIT_DONE_TIME_MS:
913 return Management::vm_init_done_time();
914
915 case JMM_JVM_UPTIME_MS:
916 return Management::ticks_to_ms(os::elapsed_counter());
917
918 case JMM_COMPILE_TOTAL_TIME_MS:
919 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
920
921 case JMM_OS_PROCESS_ID:
922 return os::current_process_id();
923
924 // Hotspot-specific counters
925 case JMM_CLASS_LOADED_BYTES:
926 return ClassLoadingService::loaded_class_bytes();
927
928 case JMM_CLASS_UNLOADED_BYTES:
929 return ClassLoadingService::unloaded_class_bytes();
930
931 case JMM_SHARED_CLASS_LOADED_COUNT:
932 return ClassLoadingService::loaded_shared_class_count();
933
934 case JMM_SHARED_CLASS_UNLOADED_COUNT:
935 return ClassLoadingService::unloaded_shared_class_count();
936
937
938 case JMM_SHARED_CLASS_LOADED_BYTES:
939 return ClassLoadingService::loaded_shared_class_bytes();
940
941 case JMM_SHARED_CLASS_UNLOADED_BYTES:
942 return ClassLoadingService::unloaded_shared_class_bytes();
943
944 case JMM_TOTAL_CLASSLOAD_TIME_MS:
945 return ClassLoader::classloader_time_ms();
946
947 case JMM_VM_GLOBAL_COUNT:
948 return get_num_flags();
949
950 case JMM_SAFEPOINT_COUNT:
951 return RuntimeService::safepoint_count();
952
953 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
954 return RuntimeService::safepoint_sync_time_ms();
955
956 case JMM_TOTAL_STOPPED_TIME_MS:
957 return RuntimeService::safepoint_time_ms();
958
959 case JMM_TOTAL_APP_TIME_MS:
960 return RuntimeService::application_time_ms();
961
962 case JMM_VM_THREAD_COUNT:
963 return get_vm_thread_count();
964
965 case JMM_CLASS_INIT_TOTAL_COUNT:
966 return ClassLoader::class_init_count();
967
968 case JMM_CLASS_INIT_TOTAL_TIME_MS:
969 return ClassLoader::class_init_time_ms();
970
971 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
972 return ClassLoader::class_verify_time_ms();
973
974 case JMM_METHOD_DATA_SIZE_BYTES:
975 return ClassLoadingService::class_method_data_size();
976
977 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
978 return os::physical_memory();
979
980 default:
981 return -1;
982 }
983 }
984
985
986 // Returns the long value of a given attribute.
987 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
988 if (obj == nullptr) {
989 return get_long_attribute(att);
990 } else {
991 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
992 if (mgr != nullptr) {
993 return get_gc_attribute(mgr, att);
994 }
995 }
996 return -1;
997 JVM_END
998
999 // Gets the value of all attributes specified in the given array
1000 // and sets the value in the result array.
1001 // Returns the number of attributes found.
1002 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1003 jobject obj,
1004 jmmLongAttribute* atts,
1005 jint count,
1006 jlong* result))
1007
1008 int num_atts = 0;
1009 if (obj == nullptr) {
1010 for (int i = 0; i < count; i++) {
1011 result[i] = get_long_attribute(atts[i]);
1012 if (result[i] != -1) {
1013 num_atts++;
1014 }
1015 }
1016 } else {
1017 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1018 for (int i = 0; i < count; i++) {
1019 result[i] = get_gc_attribute(mgr, atts[i]);
1020 if (result[i] != -1) {
1021 num_atts++;
1022 }
1023 }
1024 }
1025 return num_atts;
1026 JVM_END
1027
1028 // Helper function to do thread dump for a specific list of threads
1029 static void do_thread_dump(ThreadDumpResult* dump_result,
1030 typeArrayHandle ids_ah, // array of thread ID (long[])
1031 int num_threads,
1032 int max_depth,
1033 bool with_locked_monitors,
1034 bool with_locked_synchronizers,
1035 TRAPS) {
1036 // no need to actually perform thread dump if no TIDs are specified
1037 if (num_threads == 0) return;
1038
1039 // First get an array of threadObj handles.
1040 // A JavaThread may terminate before we get the stack trace.
1041 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1042
1043 {
1044 // Need this ThreadsListHandle for converting Java thread IDs into
1045 // threadObj handles; dump_result->set_t_list() is called in the
1046 // VM op below so we can't use it yet.
1047 ThreadsListHandle tlh;
1048 for (int i = 0; i < num_threads; i++) {
1049 jlong tid = ids_ah->long_at(i);
1050 JavaThread* jt = tlh.list()->find_JavaThread_from_java_tid(tid);
1051 oop thread_obj = is_platform_thread(jt) ? jt->threadObj() : (oop)nullptr;
1052 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1053 thread_handle_array->append(threadObj_h);
1054 }
1055 }
1056
1057 // Obtain thread dumps and thread snapshot information
1058 VM_ThreadDump op(dump_result,
1059 thread_handle_array,
1060 num_threads,
1061 max_depth, /* stack depth */
1062 with_locked_monitors,
1063 with_locked_synchronizers);
1064 VMThread::execute(&op);
1065 }
1066
1067 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1068 // for the thread ID specified in the corresponding entry in
1069 // the given array of thread IDs; or null if the thread does not exist
1070 // or has terminated.
1071 //
1072 // Input parameters:
1073 // ids - array of thread IDs
1074 // maxDepth - the maximum depth of stack traces to be dumped:
1075 // maxDepth == -1 requests to dump entire stack trace.
1076 // maxDepth == 0 requests no stack trace.
1077 // infoArray - array of ThreadInfo objects
1078 //
1079 // QQQ - Why does this method return a value instead of void?
1080 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1081 // Check if threads is null
1082 if (ids == nullptr || infoArray == nullptr) {
1083 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1084 }
1085
1086 if (maxDepth < -1) {
1087 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1088 "Invalid maxDepth", -1);
1089 }
1090
1091 ResourceMark rm(THREAD);
1092 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1093 typeArrayHandle ids_ah(THREAD, ta);
1094
1095 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1096 objArrayOop oa = objArrayOop(infoArray_obj);
1097 objArrayHandle infoArray_h(THREAD, oa);
1098
1099 // validate the thread id array
1100 validate_thread_id_array(ids_ah, CHECK_0);
1101
1102 // validate the ThreadInfo[] parameters
1103 validate_thread_info_array(infoArray_h, CHECK_0);
1104
1105 // infoArray must be of the same length as the given array of thread IDs
1106 int num_threads = ids_ah->length();
1107 if (num_threads != infoArray_h->length()) {
1108 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1109 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1110 }
1111
1112 // Must use ThreadDumpResult to store the ThreadSnapshot.
1113 // GC may occur after the thread snapshots are taken but before
1114 // this function returns. The threadObj and other oops kept
1115 // in the ThreadSnapshot are marked and adjusted during GC.
1116 ThreadDumpResult dump_result(num_threads);
1117
1118 if (maxDepth == 0) {
1119 // No stack trace to dump so we do not need to stop the world.
1120 // Since we never do the VM op here we must set the threads list.
1121 dump_result.set_t_list();
1122 for (int i = 0; i < num_threads; i++) {
1123 jlong tid = ids_ah->long_at(i);
1124 JavaThread* jt = dump_result.t_list()->find_JavaThread_from_java_tid(tid);
1125 if (jt == nullptr) {
1126 // if the thread does not exist or now it is terminated,
1127 // create dummy snapshot
1128 dump_result.add_thread_snapshot();
1129 } else {
1130 dump_result.add_thread_snapshot(jt);
1131 }
1132 }
1133 } else {
1134 // obtain thread dump with the specific list of threads with stack trace
1135 do_thread_dump(&dump_result,
1136 ids_ah,
1137 num_threads,
1138 maxDepth,
1139 false, /* no locked monitor */
1140 false, /* no locked synchronizers */
1141 CHECK_0);
1142 }
1143
1144 int num_snapshots = dump_result.num_snapshots();
1145 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1146 assert(num_snapshots == 0 || dump_result.t_list_has_been_set(), "ThreadsList must have been set if we have a snapshot");
1147 int index = 0;
1148 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != nullptr; index++, ts = ts->next()) {
1149 // For each thread, create an java/lang/management/ThreadInfo object
1150 // and fill with the thread information
1151
1152 if (!is_platform_thread(ts)) {
1153 // if the thread does not exist, has terminated, or is a virtual thread, then set threadinfo to null
1154 infoArray_h->obj_at_put(index, nullptr);
1155 continue;
1156 }
1157
1158 // Create java.lang.management.ThreadInfo object
1159 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1160 infoArray_h->obj_at_put(index, info_obj);
1161 }
1162 return 0;
1163 JVM_END
1164
1165 // Dump thread info for the specified threads.
1166 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1167 // for the thread ID specified in the corresponding entry in
1168 // the given array of thread IDs; or null if the thread does not exist
1169 // or has terminated.
1170 //
1171 // Input parameter:
1172 // ids - array of thread IDs; null indicates all live threads
1173 // locked_monitors - if true, dump locked object monitors
1174 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1175 //
1176 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors,
1177 jboolean locked_synchronizers, jint maxDepth))
1178 ResourceMark rm(THREAD);
1179
1180 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1181 int num_threads = (ta != nullptr ? ta->length() : 0);
1182 typeArrayHandle ids_ah(THREAD, ta);
1183
1184 ThreadDumpResult dump_result(num_threads); // can safepoint
1185
1186 if (ids_ah() != nullptr) {
1187
1188 // validate the thread id array
1189 validate_thread_id_array(ids_ah, CHECK_NULL);
1190
1191 // obtain thread dump of a specific list of threads
1192 do_thread_dump(&dump_result,
1193 ids_ah,
1194 num_threads,
1195 maxDepth, /* stack depth */
1196 (locked_monitors ? true : false), /* with locked monitors */
1197 (locked_synchronizers ? true : false), /* with locked synchronizers */
1198 CHECK_NULL);
1199 } else {
1200 // obtain thread dump of all threads
1201 VM_ThreadDump op(&dump_result,
1202 maxDepth, /* stack depth */
1203 (locked_monitors ? true : false), /* with locked monitors */
1204 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1205 VMThread::execute(&op);
1206 }
1207
1208 int num_snapshots = dump_result.num_snapshots();
1209 assert(num_snapshots == 0 || dump_result.t_list_has_been_set(), "ThreadsList must have been set if we have a snapshot");
1210
1211 // create the result ThreadInfo[] object
1212 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1213 objArrayOop r = oopFactory::new_objArray(ik, num_snapshots, CHECK_NULL);
1214 objArrayHandle result_h(THREAD, r);
1215
1216 int index = 0;
1217 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != nullptr; ts = ts->next(), index++) {
1218 if (!is_platform_thread(ts)) {
1219 // if the thread does not exist, has terminated, or is a virtual thread, then set threadinfo to null
1220 result_h->obj_at_put(index, nullptr);
1221 continue;
1222 }
1223
1224 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1225 assert(stacktrace != nullptr, "Must have a stack trace dumped");
1226
1227 // Create Object[] filled with locked monitors
1228 // Create int[] filled with the stack depth where a monitor was locked
1229 int num_frames = stacktrace->get_stack_depth();
1230 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1231
1232 // Count the total number of locked monitors
1233 for (int i = 0; i < num_frames; i++) {
1234 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1235 num_locked_monitors += frame->num_locked_monitors();
1236 }
1237
1238 objArrayHandle monitors_array;
1239 typeArrayHandle depths_array;
1240 objArrayHandle synchronizers_array;
1241
1242 if (locked_monitors) {
1243 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1244 // where the thread locked it
1245 objArrayOop array = oopFactory::new_objArray(vmClasses::Object_klass(), num_locked_monitors, CHECK_NULL);
1246 objArrayHandle mh(THREAD, array);
1247 monitors_array = mh;
1248
1249 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1250 typeArrayHandle dh(THREAD, tarray);
1251 depths_array = dh;
1252
1253 int count = 0;
1254 int j = 0;
1255 for (int depth = 0; depth < num_frames; depth++) {
1256 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1257 int len = frame->num_locked_monitors();
1258 GrowableArray<OopHandle>* locked_monitors = frame->locked_monitors();
1259 for (j = 0; j < len; j++) {
1260 oop monitor = locked_monitors->at(j).resolve();
1261 assert(monitor != nullptr, "must be a Java object");
1262 monitors_array->obj_at_put(count, monitor);
1263 depths_array->int_at_put(count, depth);
1264 count++;
1265 }
1266 }
1267
1268 GrowableArray<OopHandle>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1269 for (j = 0; j < jni_locked_monitors->length(); j++) {
1270 oop object = jni_locked_monitors->at(j).resolve();
1271 assert(object != nullptr, "must be a Java object");
1272 monitors_array->obj_at_put(count, object);
1273 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1274 depths_array->int_at_put(count, -1);
1275 count++;
1276 }
1277 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1278 }
1279
1280 if (locked_synchronizers) {
1281 // Create Object[] filled with locked JSR-166 synchronizers
1282 assert(ts->threadObj() != nullptr, "Must be a valid JavaThread");
1283 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1284 GrowableArray<OopHandle>* locks = (tcl != nullptr ? tcl->owned_locks() : nullptr);
1285 int num_locked_synchronizers = (locks != nullptr ? locks->length() : 0);
1286
1287 objArrayOop array = oopFactory::new_objArray(vmClasses::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1288 objArrayHandle sh(THREAD, array);
1289 synchronizers_array = sh;
1290
1291 for (int k = 0; k < num_locked_synchronizers; k++) {
1292 synchronizers_array->obj_at_put(k, locks->at(k).resolve());
1293 }
1294 }
1295
1296 // Create java.lang.management.ThreadInfo object
1297 instanceOop info_obj = Management::create_thread_info_instance(ts,
1298 monitors_array,
1299 depths_array,
1300 synchronizers_array,
1301 CHECK_NULL);
1302 result_h->obj_at_put(index, info_obj);
1303 }
1304
1305 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
1306 JVM_END
1307
1308 // Reset statistic. Return true if the requested statistic is reset.
1309 // Otherwise, return false.
1310 //
1311 // Input parameters:
1312 // obj - specify which instance the statistic associated with to be reset
1313 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1314 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1315 // type - the type of statistic to be reset
1316 //
1317 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1318 ResourceMark rm(THREAD);
1319
1320 switch (type) {
1321 case JMM_STAT_PEAK_THREAD_COUNT:
1322 ThreadService::reset_peak_thread_count();
1323 return true;
1324
1325 case JMM_STAT_THREAD_CONTENTION_COUNT:
1326 case JMM_STAT_THREAD_CONTENTION_TIME: {
1327 jlong tid = obj.j;
1328 if (tid < 0) {
1329 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1330 }
1331
1332 // Look for the JavaThread of this given tid
1333 JavaThreadIteratorWithHandle jtiwh;
1334 if (tid == 0) {
1335 // reset contention statistics for all threads if tid == 0
1336 for (; JavaThread *java_thread = jtiwh.next(); ) {
1337 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1338 ThreadService::reset_contention_count_stat(java_thread);
1339 } else {
1340 ThreadService::reset_contention_time_stat(java_thread);
1341 }
1342 }
1343 } else {
1344 // reset contention statistics for a given thread
1345 JavaThread* java_thread = jtiwh.list()->find_JavaThread_from_java_tid(tid);
1346 if (java_thread == nullptr) {
1347 return false;
1348 }
1349
1350 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1351 ThreadService::reset_contention_count_stat(java_thread);
1352 } else {
1353 ThreadService::reset_contention_time_stat(java_thread);
1354 }
1355 }
1356 return true;
1357 break;
1358 }
1359 case JMM_STAT_PEAK_POOL_USAGE: {
1360 jobject o = obj.l;
1361 if (o == nullptr) {
1362 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1363 }
1364
1365 oop pool_obj = JNIHandles::resolve(o);
1366 assert(pool_obj->is_instance(), "Should be an instanceOop");
1367 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1368
1369 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1370 if (pool != nullptr) {
1371 pool->reset_peak_memory_usage();
1372 return true;
1373 }
1374 break;
1375 }
1376 case JMM_STAT_GC_STAT: {
1377 jobject o = obj.l;
1378 if (o == nullptr) {
1379 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1380 }
1381
1382 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_false);
1383 if (mgr != nullptr) {
1384 mgr->reset_gc_stat();
1385 return true;
1386 }
1387 break;
1388 }
1389 default:
1390 assert(0, "Unknown Statistic Type");
1391 }
1392 return false;
1393 JVM_END
1394
1395 // Returns the fast estimate of CPU time consumed by
1396 // a given thread (in nanoseconds).
1397 // If thread_id == 0, return CPU time for the current thread.
1398 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1399 if (!os::is_thread_cpu_time_supported()) {
1400 return -1;
1401 }
1402
1403 if (thread_id < 0) {
1404 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1405 "Invalid thread ID", -1);
1406 }
1407
1408 JavaThread* java_thread = nullptr;
1409 if (thread_id == 0) {
1410 // current thread
1411 return os::current_thread_cpu_time();
1412 } else {
1413 ThreadsListHandle tlh;
1414 java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
1415 if (is_platform_thread(java_thread)) {
1416 return os::thread_cpu_time((Thread*) java_thread);
1417 }
1418 }
1419 return -1;
1420 JVM_END
1421
1422 // Returns a String array of all VM global flag names
1423 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1424 // last flag entry is always null, so subtract 1
1425 int nFlags = (int) JVMFlag::numFlags - 1;
1426 // allocate a temp array
1427 objArrayOop r = oopFactory::new_objArray(vmClasses::String_klass(),
1428 nFlags, CHECK_NULL);
1429 objArrayHandle flags_ah(THREAD, r);
1430 int num_entries = 0;
1431 for (int i = 0; i < nFlags; i++) {
1432 JVMFlag* flag = &JVMFlag::flags[i];
1433 // Exclude develop flags in product builds.
1434 if (flag->is_constant_in_binary()) {
1435 continue;
1436 }
1437 // Exclude the locked (experimental, diagnostic) flags
1438 if (flag->is_unlocked() || flag->is_unlocker()) {
1439 Handle s = java_lang_String::create_from_str(flag->name(), CHECK_NULL);
1440 flags_ah->obj_at_put(num_entries, s());
1441 num_entries++;
1442 }
1443 }
1444
1445 if (num_entries < nFlags) {
1446 // Return array of right length
1447 objArrayOop res = oopFactory::new_objArray(vmClasses::String_klass(), num_entries, CHECK_NULL);
1448 for(int i = 0; i < num_entries; i++) {
1449 res->obj_at_put(i, flags_ah->obj_at(i));
1450 }
1451 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1452 }
1453
1454 return (jobjectArray)JNIHandles::make_local(THREAD, flags_ah());
1455 JVM_END
1456
1457 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1458 // can't be determined, true otherwise. If false is returned, then *global
1459 // will be incomplete and invalid.
1460 static bool add_global_entry(Handle name, jmmVMGlobal *global, JVMFlag *flag, TRAPS) {
1461 Handle flag_name;
1462 if (name() == nullptr) {
1463 flag_name = java_lang_String::create_from_str(flag->name(), CHECK_false);
1464 } else {
1465 flag_name = name;
1466 }
1467 global->name = (jstring)JNIHandles::make_local(THREAD, flag_name());
1468
1469 if (flag->is_bool()) {
1470 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1471 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1472 } else if (flag->is_int()) {
1473 global->value.j = (jlong)flag->get_int();
1474 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1475 } else if (flag->is_uint()) {
1476 global->value.j = (jlong)flag->get_uint();
1477 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1478 } else if (flag->is_intx()) {
1479 global->value.j = (jlong)flag->get_intx();
1480 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1481 } else if (flag->is_uintx()) {
1482 global->value.j = (jlong)flag->get_uintx();
1483 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1484 } else if (flag->is_uint64_t()) {
1485 global->value.j = (jlong)flag->get_uint64_t();
1486 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1487 } else if (flag->is_double()) {
1488 global->value.d = (jdouble)flag->get_double();
1489 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE;
1490 } else if (flag->is_size_t()) {
1491 global->value.j = (jlong)flag->get_size_t();
1492 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1493 } else if (flag->is_ccstr()) {
1494 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1495 global->value.l = (jobject)JNIHandles::make_local(THREAD, str());
1496 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1497 } else {
1498 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1499 return false;
1500 }
1501
1502 global->writeable = flag->is_writeable();
1503 global->external = flag->is_external();
1504 switch (flag->get_origin()) {
1505 case JVMFlagOrigin::DEFAULT:
1506 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1507 break;
1508 case JVMFlagOrigin::COMMAND_LINE:
1509 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1510 break;
1511 case JVMFlagOrigin::ENVIRON_VAR:
1512 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1513 break;
1514 case JVMFlagOrigin::CONFIG_FILE:
1515 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1516 break;
1517 case JVMFlagOrigin::MANAGEMENT:
1518 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1519 break;
1520 case JVMFlagOrigin::ERGONOMIC:
1521 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1522 break;
1523 case JVMFlagOrigin::ATTACH_ON_DEMAND:
1524 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND;
1525 break;
1526 default:
1527 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1528 }
1529
1530 return true;
1531 }
1532
1533 // Fill globals array of count length with jmmVMGlobal entries
1534 // specified by names. If names == null, fill globals array
1535 // with all Flags. Return value is number of entries
1536 // created in globals.
1537 // If a JVMFlag with a given name in an array element does not
1538 // exist, globals[i].name will be set to null.
1539 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1540 jobjectArray names,
1541 jmmVMGlobal *globals,
1542 jint count))
1543
1544
1545 if (globals == nullptr) {
1546 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1547 }
1548
1549 ResourceMark rm(THREAD);
1550
1551 if (names != nullptr) {
1552 // return the requested globals
1553 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1554 objArrayHandle names_ah(THREAD, ta);
1555 // Make sure we have a String array
1556 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1557 if (element_klass != vmClasses::String_klass()) {
1558 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1559 "Array element type is not String class", 0);
1560 }
1561
1562 int names_length = names_ah->length();
1563 int num_entries = 0;
1564 for (int i = 0; i < names_length && i < count; i++) {
1565 oop s = names_ah->obj_at(i);
1566 if (s == nullptr) {
1567 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1568 }
1569
1570 Handle sh(THREAD, s);
1571 char* str = java_lang_String::as_utf8_string(s);
1572 JVMFlag* flag = JVMFlag::find_flag(str);
1573 if (flag != nullptr &&
1574 add_global_entry(sh, &globals[i], flag, THREAD)) {
1575 num_entries++;
1576 } else {
1577 globals[i].name = nullptr;
1578 }
1579 }
1580 return num_entries;
1581 } else {
1582 // return all globals if names == null
1583
1584 // last flag entry is always null, so subtract 1
1585 int nFlags = (int) JVMFlag::numFlags - 1;
1586 Handle null_h;
1587 int num_entries = 0;
1588 for (int i = 0; i < nFlags && num_entries < count; i++) {
1589 JVMFlag* flag = &JVMFlag::flags[i];
1590 // Exclude develop flags in product builds.
1591 if (flag->is_constant_in_binary()) {
1592 continue;
1593 }
1594 // Exclude the locked (diagnostic, experimental) flags
1595 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1596 add_global_entry(null_h, &globals[num_entries], flag, THREAD)) {
1597 num_entries++;
1598 }
1599 }
1600 return num_entries;
1601 }
1602 JVM_END
1603
1604 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1605 ResourceMark rm(THREAD);
1606
1607 oop fn = JNIHandles::resolve_external_guard(flag_name);
1608 if (fn == nullptr) {
1609 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1610 "The flag name cannot be null.");
1611 }
1612 char* name = java_lang_String::as_utf8_string(fn);
1613
1614 FormatBuffer<80> error_msg("%s", "");
1615 int succeed = WriteableFlags::set_flag(name, new_value, JVMFlagOrigin::MANAGEMENT, error_msg);
1616
1617 if (succeed != JVMFlag::SUCCESS) {
1618 if (succeed == JVMFlag::MISSING_VALUE) {
1619 // missing value causes NPE to be thrown
1620 THROW(vmSymbols::java_lang_NullPointerException());
1621 } else {
1622 // all the other errors are reported as IAE with the appropriate error message
1623 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1624 error_msg.buffer());
1625 }
1626 }
1627 assert(succeed == JVMFlag::SUCCESS, "Setting flag should succeed");
1628 JVM_END
1629
1630 class ThreadTimesClosure: public ThreadClosure {
1631 private:
1632 objArrayHandle _names_strings;
1633 char **_names_chars;
1634 typeArrayHandle _times;
1635 int _names_len;
1636 int _times_len;
1637 int _count;
1638
1639 public:
1640 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1641 ~ThreadTimesClosure();
1642 virtual void do_thread(Thread* thread);
1643 void do_unlocked(TRAPS);
1644 int count() { return _count; }
1645 };
1646
1647 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1648 typeArrayHandle times) {
1649 assert(names() != nullptr, "names was null");
1650 assert(times() != nullptr, "times was null");
1651 _names_strings = names;
1652 _names_len = names->length();
1653 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1654 _times = times;
1655 _times_len = times->length();
1656 _count = 0;
1657 }
1658
1659 //
1660 // Called with Threads_lock held
1661 //
1662 void ThreadTimesClosure::do_thread(Thread* thread) {
1663 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
1664 assert(thread != nullptr, "thread was null");
1665
1666 // exclude externally visible JavaThreads
1667 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1668 return;
1669 }
1670
1671 if (_count >= _names_len || _count >= _times_len) {
1672 // skip if the result array is not big enough
1673 return;
1674 }
1675
1676 ResourceMark rm; // thread->name() uses ResourceArea
1677
1678 assert(thread->name() != nullptr, "All threads should have a name");
1679 _names_chars[_count] = os::strdup_check_oom(thread->name());
1680 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1681 os::thread_cpu_time(thread) : -1);
1682 _count++;
1683 }
1684
1685 // Called without Threads_lock, we can allocate String objects.
1686 void ThreadTimesClosure::do_unlocked(TRAPS) {
1687
1688 for (int i = 0; i < _count; i++) {
1689 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1690 _names_strings->obj_at_put(i, s());
1691 }
1692 }
1693
1694 ThreadTimesClosure::~ThreadTimesClosure() {
1695 for (int i = 0; i < _count; i++) {
1696 os::free(_names_chars[i]);
1697 }
1698 FREE_C_HEAP_ARRAY(char *, _names_chars);
1699 }
1700
1701 // Fills names with VM internal thread names and times with the corresponding
1702 // CPU times. If names or times is null, a NullPointerException is thrown.
1703 // If the element type of names is not String, an IllegalArgumentException is
1704 // thrown.
1705 // If an array is not large enough to hold all the entries, only the entries
1706 // that fit will be returned. Return value is the number of VM internal
1707 // threads entries.
1708 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1709 jobjectArray names,
1710 jlongArray times))
1711 if (names == nullptr || times == nullptr) {
1712 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1713 }
1714 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1715 objArrayHandle names_ah(THREAD, na);
1716
1717 // Make sure we have a String array
1718 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1719 if (element_klass != vmClasses::String_klass()) {
1720 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1721 "Array element type is not String class", 0);
1722 }
1723
1724 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1725 typeArrayHandle times_ah(THREAD, ta);
1726
1727 ThreadTimesClosure ttc(names_ah, times_ah);
1728 {
1729 MutexLocker ml(THREAD, Threads_lock);
1730 Threads::threads_do(&ttc);
1731 }
1732 ttc.do_unlocked(THREAD);
1733 return ttc.count();
1734 JVM_END
1735
1736 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1737 ResourceMark rm(THREAD);
1738
1739 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1740 VMThread::execute(&op);
1741
1742 DeadlockCycle* deadlocks = op.result();
1743 if (deadlocks == nullptr) {
1744 // no deadlock found and return
1745 return Handle();
1746 }
1747
1748 int num_threads = 0;
1749 DeadlockCycle* cycle;
1750 for (cycle = deadlocks; cycle != nullptr; cycle = cycle->next()) {
1751 num_threads += cycle->num_threads();
1752 }
1753
1754 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NH);
1755 objArrayHandle threads_ah(THREAD, r);
1756
1757 int index = 0;
1758 for (cycle = deadlocks; cycle != nullptr; cycle = cycle->next()) {
1759 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1760 int len = deadlock_threads->length();
1761 for (int i = 0; i < len; i++) {
1762 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1763 index++;
1764 }
1765 }
1766 return threads_ah;
1767 }
1768
1769 // Finds cycles of threads that are deadlocked involved in object monitors
1770 // and JSR-166 synchronizers.
1771 // Returns an array of Thread objects which are in deadlock, if any.
1772 // Otherwise, returns null.
1773 //
1774 // Input parameter:
1775 // object_monitors_only - if true, only check object monitors
1776 //
1777 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1778 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_NULL);
1779 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1780 JVM_END
1781
1782 // Finds cycles of threads that are deadlocked on monitor locks
1783 // Returns an array of Thread objects which are in deadlock, if any.
1784 // Otherwise, returns null.
1785 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1786 Handle result = find_deadlocks(true, CHECK_NULL);
1787 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1788 JVM_END
1789
1790 // Gets the information about GC extension attributes including
1791 // the name of the attribute, its type, and a short description.
1792 //
1793 // Input parameters:
1794 // mgr - GC memory manager
1795 // info - caller allocated array of jmmExtAttributeInfo
1796 // count - number of elements of the info array
1797 //
1798 // Returns the number of GC extension attributes filled in the info array; or
1799 // -1 if info is not big enough
1800 //
1801 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1802 // All GC memory managers have 1 attribute (number of GC threads)
1803 if (count == 0) {
1804 return 0;
1805 }
1806
1807 if (info == nullptr) {
1808 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1809 }
1810
1811 info[0].name = "GcThreadCount";
1812 info[0].type = 'I';
1813 info[0].description = "Number of GC threads";
1814 return 1;
1815 JVM_END
1816
1817 // verify the given array is an array of java/lang/management/MemoryUsage objects
1818 // of a given length and return the objArrayOop
1819 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1820 if (array == nullptr) {
1821 THROW_NULL(vmSymbols::java_lang_NullPointerException());
1822 }
1823
1824 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1825 objArrayHandle array_h(THREAD, oa);
1826
1827 // array must be of the given length
1828 if (length != array_h->length()) {
1829 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1830 "The length of the given MemoryUsage array does not match the number of memory pools.");
1831 }
1832
1833 // check if the element of array is of type MemoryUsage class
1834 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_NULL);
1835 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1836 if (element_klass != usage_klass) {
1837 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1838 "The element type is not MemoryUsage class");
1839 }
1840
1841 return array_h();
1842 }
1843
1844 // Gets the statistics of the last GC of a given GC memory manager.
1845 // Input parameters:
1846 // obj - GarbageCollectorMXBean object
1847 // gc_stat - caller allocated jmmGCStat where:
1848 // a. before_gc_usage - array of MemoryUsage objects
1849 // b. after_gc_usage - array of MemoryUsage objects
1850 // c. gc_ext_attributes_values_size is set to the
1851 // gc_ext_attribute_values array allocated
1852 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1853 //
1854 // On return,
1855 // gc_index == 0 indicates no GC statistics available
1856 //
1857 // before_gc_usage and after_gc_usage - filled with per memory pool
1858 // before and after GC usage in the same order as the memory pools
1859 // returned by GetMemoryPools for a given GC memory manager.
1860 // num_gc_ext_attributes indicates the number of elements in
1861 // the gc_ext_attribute_values array is filled; or
1862 // -1 if the gc_ext_attributes_values array is not big enough
1863 //
1864 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1865 ResourceMark rm(THREAD);
1866
1867 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == nullptr) {
1868 THROW(vmSymbols::java_lang_NullPointerException());
1869 }
1870
1871 // Get the GCMemoryManager
1872 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1873
1874 // Make a copy of the last GC statistics
1875 // GC may occur while constructing the last GC information
1876 int num_pools = MemoryService::num_memory_pools();
1877 GCStatInfo stat(num_pools);
1878 if (mgr->get_last_gc_stat(&stat) == 0) {
1879 gc_stat->gc_index = 0;
1880 return;
1881 }
1882
1883 gc_stat->gc_index = stat.gc_index();
1884 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
1885 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
1886
1887 // Current implementation does not have GC extension attributes
1888 gc_stat->num_gc_ext_attributes = 0;
1889
1890 // Fill the arrays of MemoryUsage objects with before and after GC
1891 // per pool memory usage
1892 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
1893 num_pools,
1894 CHECK);
1895 objArrayHandle usage_before_gc_ah(THREAD, bu);
1896
1897 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
1898 num_pools,
1899 CHECK);
1900 objArrayHandle usage_after_gc_ah(THREAD, au);
1901
1902 for (int i = 0; i < num_pools; i++) {
1903 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
1904 Handle after_usage;
1905
1906 MemoryUsage u = stat.after_gc_usage_for_pool(i);
1907 if (u.max_size() == 0 && u.used() > 0) {
1908 // If max size == 0, this pool is a survivor space.
1909 // Set max size = -1 since the pools will be swapped after GC.
1910 MemoryUsage usage(u.init_size(), u.used(), u.committed(), MemoryUsage::undefined_size());
1911 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
1912 } else {
1913 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
1914 }
1915 usage_before_gc_ah->obj_at_put(i, before_usage());
1916 usage_after_gc_ah->obj_at_put(i, after_usage());
1917 }
1918
1919 if (gc_stat->gc_ext_attribute_values_size > 0) {
1920 // Current implementation only has 1 attribute (number of GC threads)
1921 // The type is 'I'
1922 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
1923 }
1924 JVM_END
1925
1926 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
1927 ResourceMark rm(THREAD);
1928 // Get the GCMemoryManager
1929 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1930 mgr->set_notification_enabled(enabled?true:false);
1931 JVM_END
1932
1933 // Dump heap - Returns 0 if succeeds.
1934 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
1935 #if INCLUDE_SERVICES
1936 ResourceMark rm(THREAD);
1937 oop on = JNIHandles::resolve_external_guard(outputfile);
1938 if (on == nullptr) {
1939 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
1940 "Output file name cannot be null.", -1);
1941 }
1942 Handle onhandle(THREAD, on);
1943 char* name = java_lang_String::as_platform_dependent_str(onhandle, CHECK_(-1));
1944 if (name == nullptr) {
1945 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
1946 "Output file name cannot be null.", -1);
1947 }
1948 HeapDumper dumper(live ? true : false);
1949 if (dumper.dump(name) != 0) {
1950 const char* errmsg = dumper.error_as_C_string();
1951 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
1952 }
1953 return 0;
1954 #else // INCLUDE_SERVICES
1955 return -1;
1956 #endif // INCLUDE_SERVICES
1957 JVM_END
1958
1959 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
1960 ResourceMark rm(THREAD);
1961 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
1962 objArrayOop cmd_array_oop = oopFactory::new_objArray(vmClasses::String_klass(),
1963 dcmd_list->length(), CHECK_NULL);
1964 objArrayHandle cmd_array(THREAD, cmd_array_oop);
1965 for (int i = 0; i < dcmd_list->length(); i++) {
1966 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
1967 cmd_array->obj_at_put(i, cmd_name);
1968 }
1969 return (jobjectArray) JNIHandles::make_local(THREAD, cmd_array());
1970 JVM_END
1971
1972 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
1973 dcmdInfo* infoArray))
1974 if (cmds == nullptr || infoArray == nullptr) {
1975 THROW(vmSymbols::java_lang_NullPointerException());
1976 }
1977
1978 ResourceMark rm(THREAD);
1979
1980 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
1981 objArrayHandle cmds_ah(THREAD, ca);
1982
1983 // Make sure we have a String array
1984 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
1985 if (element_klass != vmClasses::String_klass()) {
1986 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1987 "Array element type is not String class");
1988 }
1989
1990 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
1991
1992 int num_cmds = cmds_ah->length();
1993 for (int i = 0; i < num_cmds; i++) {
1994 oop cmd = cmds_ah->obj_at(i);
1995 if (cmd == nullptr) {
1996 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1997 "Command name cannot be null.");
1998 }
1999 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2000 if (cmd_name == nullptr) {
2001 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2002 "Command name cannot be null.");
2003 }
2004 int pos = info_list->find_if([&](DCmdInfo* info) {
2005 return info->name_equals(cmd_name);
2006 });
2007 if (pos == -1) {
2008 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2009 "Unknown diagnostic command");
2010 }
2011 DCmdInfo* info = info_list->at(pos);
2012 infoArray[i].name = info->name();
2013 infoArray[i].description = info->description();
2014 infoArray[i].impact = info->impact();
2015 infoArray[i].num_arguments = info->num_arguments();
2016 infoArray[i].enabled = info->is_enabled();
2017 }
2018 JVM_END
2019
2020 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2021 jstring command, dcmdArgInfo* infoArray, jint count))
2022 ResourceMark rm(THREAD);
2023 oop cmd = JNIHandles::resolve_external_guard(command);
2024 if (cmd == nullptr) {
2025 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2026 "Command line cannot be null.");
2027 }
2028 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2029 if (cmd_name == nullptr) {
2030 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2031 "Command line content cannot be null.");
2032 }
2033 DCmd* dcmd = nullptr;
2034 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2035 strlen(cmd_name));
2036 if (factory != nullptr) {
2037 dcmd = factory->create_resource_instance(nullptr);
2038 }
2039 if (dcmd == nullptr) {
2040 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2041 "Unknown diagnostic command");
2042 }
2043 DCmdMark mark(dcmd);
2044 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2045 const int num_args = array->length();
2046 if (num_args != count) {
2047 assert(false, "jmm_GetDiagnosticCommandArgumentsInfo count mismatch (%d vs %d)", count, num_args);
2048 THROW_MSG(vmSymbols::java_lang_InternalError(), "jmm_GetDiagnosticCommandArgumentsInfo count mismatch");
2049 }
2050 for (int i = 0; i < num_args; i++) {
2051 infoArray[i].name = array->at(i)->name();
2052 infoArray[i].description = array->at(i)->description();
2053 infoArray[i].type = array->at(i)->type();
2054 infoArray[i].default_string = array->at(i)->default_string();
2055 infoArray[i].mandatory = array->at(i)->is_mandatory();
2056 infoArray[i].option = array->at(i)->is_option();
2057 infoArray[i].multiple = array->at(i)->is_multiple();
2058 infoArray[i].position = array->at(i)->position();
2059 }
2060 return;
2061 JVM_END
2062
2063 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2064 ResourceMark rm(THREAD);
2065 oop cmd = JNIHandles::resolve_external_guard(commandline);
2066 if (cmd == nullptr) {
2067 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2068 "Command line cannot be null.");
2069 }
2070 char* cmdline = java_lang_String::as_utf8_string(cmd);
2071 if (cmdline == nullptr) {
2072 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2073 "Command line content cannot be null.");
2074 }
2075 bufferedStream output;
2076 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2077 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2078 return (jstring) JNIHandles::make_local(THREAD, result);
2079 JVM_END
2080
2081 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2082 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2083 JVM_END
2084
2085 jlong Management::ticks_to_ms(jlong ticks) {
2086 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2087 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2088 * (double)1000.0);
2089 }
2090
2091 jlong Management::ticks_to_us(jlong ticks) {
2092 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2093 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2094 * (double)1000000.0);
2095 }
2096
2097 // Gets the amount of memory allocated on the Java heap since JVM launch.
2098 JVM_ENTRY(jlong, jmm_GetTotalThreadAllocatedMemory(JNIEnv *env))
2099 // A thread increments exited_allocated_bytes in ThreadService::remove_thread
2100 // only after it removes itself from the threads list, and once a TLH is
2101 // created, no thread it references can remove itself from the threads
2102 // list, so none can update exited_allocated_bytes. We therefore initialize
2103 // result with exited_allocated_bytes after after we create the TLH so that
2104 // the final result can only be short due to (1) threads that start after
2105 // the TLH is created, or (2) terminating threads that escape TLH creation
2106 // and don't update exited_allocated_bytes before we initialize result.
2107
2108 // We keep a high water mark to ensure monotonicity in case threads counted
2109 // on a previous call end up in state (2).
2110 static jlong high_water_result = 0;
2111
2112 JavaThreadIteratorWithHandle jtiwh;
2113 jlong result = ThreadService::exited_allocated_bytes();
2114 for (; JavaThread* thread = jtiwh.next();) {
2115 jlong size = thread->cooked_allocated_bytes();
2116 result += size;
2117 }
2118
2119 {
2120 assert(MonitoringSupport_lock != nullptr, "Must be");
2121 MutexLocker ml(MonitoringSupport_lock, Mutex::_no_safepoint_check_flag);
2122 if (result < high_water_result) {
2123 // Encountered (2) above, or result wrapped to a negative value. In
2124 // the latter case, it's pegged at the last positive value.
2125 result = high_water_result;
2126 } else {
2127 high_water_result = result;
2128 }
2129 }
2130 return result;
2131 JVM_END
2132
2133 // Gets the amount of memory allocated on the Java heap for a single thread.
2134 // Returns -1 if the thread does not exist or has terminated.
2135 JVM_ENTRY(jlong, jmm_GetOneThreadAllocatedMemory(JNIEnv *env, jlong thread_id))
2136 if (thread_id < 0) {
2137 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2138 "Invalid thread ID", -1);
2139 }
2140
2141 if (thread_id == 0) { // current thread
2142 return thread->cooked_allocated_bytes();
2143 }
2144
2145 ThreadsListHandle tlh;
2146 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
2147 if (is_platform_thread(java_thread)) {
2148 return java_thread->cooked_allocated_bytes();
2149 }
2150 return -1;
2151 JVM_END
2152
2153 // Gets an array containing the amount of memory allocated on the Java
2154 // heap for a set of threads (in bytes). Each element of the array is
2155 // the amount of memory allocated for the thread ID specified in the
2156 // corresponding entry in the given array of thread IDs; or -1 if the
2157 // thread does not exist or has terminated.
2158 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2159 jlongArray sizeArray))
2160 // Check if threads is null
2161 if (ids == nullptr || sizeArray == nullptr) {
2162 THROW(vmSymbols::java_lang_NullPointerException());
2163 }
2164
2165 ResourceMark rm(THREAD);
2166 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2167 typeArrayHandle ids_ah(THREAD, ta);
2168
2169 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2170 typeArrayHandle sizeArray_h(THREAD, sa);
2171
2172 // validate the thread id array
2173 validate_thread_id_array(ids_ah, CHECK);
2174
2175 // sizeArray must be of the same length as the given array of thread IDs
2176 int num_threads = ids_ah->length();
2177 if (num_threads != sizeArray_h->length()) {
2178 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2179 "The length of the given long array does not match the length of "
2180 "the given array of thread IDs");
2181 }
2182
2183 ThreadsListHandle tlh;
2184 for (int i = 0; i < num_threads; i++) {
2185 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(ids_ah->long_at(i));
2186 if (is_platform_thread(java_thread)) {
2187 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2188 }
2189 }
2190 JVM_END
2191
2192 // Returns the CPU time consumed by a given thread (in nanoseconds).
2193 // If thread_id == 0, CPU time for the current thread is returned.
2194 // If user_sys_cpu_time = true, user level and system CPU time of
2195 // a given thread is returned; otherwise, only user level CPU time
2196 // is returned.
2197 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2198 if (!os::is_thread_cpu_time_supported()) {
2199 return -1;
2200 }
2201
2202 if (thread_id < 0) {
2203 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2204 "Invalid thread ID", -1);
2205 }
2206
2207 JavaThread* java_thread = nullptr;
2208 if (thread_id == 0) {
2209 // current thread
2210 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2211 } else {
2212 ThreadsListHandle tlh;
2213 java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
2214 if (is_platform_thread(java_thread)) {
2215 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2216 }
2217 }
2218 return -1;
2219 JVM_END
2220
2221 // Gets an array containing the CPU times consumed by a set of threads
2222 // (in nanoseconds). Each element of the array is the CPU time for the
2223 // thread ID specified in the corresponding entry in the given array
2224 // of thread IDs; or -1 if the thread does not exist or has terminated.
2225 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2226 // for the given thread is returned; otherwise, only user level CPU time
2227 // is returned.
2228 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2229 jlongArray timeArray,
2230 jboolean user_sys_cpu_time))
2231 // Check if threads is null
2232 if (ids == nullptr || timeArray == nullptr) {
2233 THROW(vmSymbols::java_lang_NullPointerException());
2234 }
2235
2236 ResourceMark rm(THREAD);
2237 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2238 typeArrayHandle ids_ah(THREAD, ta);
2239
2240 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2241 typeArrayHandle timeArray_h(THREAD, tia);
2242
2243 // validate the thread id array
2244 validate_thread_id_array(ids_ah, CHECK);
2245
2246 // timeArray must be of the same length as the given array of thread IDs
2247 int num_threads = ids_ah->length();
2248 if (num_threads != timeArray_h->length()) {
2249 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2250 "The length of the given long array does not match the length of "
2251 "the given array of thread IDs");
2252 }
2253
2254 ThreadsListHandle tlh;
2255 for (int i = 0; i < num_threads; i++) {
2256 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(ids_ah->long_at(i));
2257 if (is_platform_thread(java_thread)) {
2258 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2259 user_sys_cpu_time != 0));
2260 }
2261 }
2262 JVM_END
2263
2264 const struct jmmInterface_1_ jmm_interface = {
2265 nullptr,
2266 nullptr,
2267 jmm_GetVersion,
2268 jmm_GetOptionalSupport,
2269 jmm_GetThreadInfo,
2270 jmm_GetMemoryPools,
2271 jmm_GetMemoryManagers,
2272 jmm_GetMemoryPoolUsage,
2273 jmm_GetPeakMemoryPoolUsage,
2274 jmm_GetTotalThreadAllocatedMemory,
2275 jmm_GetOneThreadAllocatedMemory,
2276 jmm_GetThreadAllocatedMemory,
2277 jmm_GetMemoryUsage,
2278 jmm_GetLongAttribute,
2279 jmm_GetBoolAttribute,
2280 jmm_SetBoolAttribute,
2281 jmm_GetLongAttributes,
2282 jmm_FindMonitorDeadlockedThreads,
2283 jmm_GetThreadCpuTime,
2284 jmm_GetVMGlobalNames,
2285 jmm_GetVMGlobals,
2286 jmm_GetInternalThreadTimes,
2287 jmm_ResetStatistic,
2288 jmm_SetPoolSensor,
2289 jmm_SetPoolThreshold,
2290 jmm_GetPoolCollectionUsage,
2291 jmm_GetGCExtAttributeInfo,
2292 jmm_GetLastGCStat,
2293 jmm_GetThreadCpuTimeWithKind,
2294 jmm_GetThreadCpuTimesWithKind,
2295 jmm_DumpHeap0,
2296 jmm_FindDeadlockedThreads,
2297 jmm_SetVMGlobal,
2298 nullptr,
2299 jmm_DumpThreads,
2300 jmm_SetGCNotificationEnabled,
2301 jmm_GetDiagnosticCommands,
2302 jmm_GetDiagnosticCommandInfo,
2303 jmm_GetDiagnosticCommandArgumentsInfo,
2304 jmm_ExecuteDiagnosticCommand,
2305 jmm_SetDiagnosticFrameworkNotificationEnabled
2306 };
2307 #endif // INCLUDE_MANAGEMENT
2308
2309 void* Management::get_jmm_interface(int version) {
2310 #if INCLUDE_MANAGEMENT
2311 if (version == JMM_VERSION) {
2312 return (void*) &jmm_interface;
2313 }
2314 #endif // INCLUDE_MANAGEMENT
2315 return nullptr;
2316 }