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 "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "gc/shared/collectedHeap.hpp"
31 #include "jmm.h"
32 #include "memory/allocation.inline.hpp"
33 #include "memory/iterator.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.hpp"
37 #include "oops/klass.hpp"
38 #include "oops/klass.inline.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/oopHandle.inline.hpp"
43 #include "oops/typeArrayOop.inline.hpp"
44 #include "runtime/flags/jvmFlag.hpp"
45 #include "runtime/globals.hpp"
46 #include "runtime/handles.inline.hpp"
47 #include "runtime/interfaceSupport.inline.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/jniHandles.inline.hpp"
50 #include "runtime/mutexLocker.hpp"
51 #include "runtime/notificationThread.hpp"
52 #include "runtime/os.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/threads.hpp"
55 #include "runtime/threadSMR.hpp"
56 #include "runtime/vmOperations.hpp"
57 #include "services/classLoadingService.hpp"
58 #include "services/diagnosticCommand.hpp"
59 #include "services/diagnosticFramework.hpp"
60 #include "services/finalizerService.hpp"
61 #include "services/writeableFlags.hpp"
62 #include "services/heapDumper.hpp"
63 #include "services/lowMemoryDetector.hpp"
64 #include "services/gcNotifier.hpp"
65 #include "services/management.hpp"
66 #include "services/memoryManager.hpp"
67 #include "services/memoryPool.hpp"
68 #include "services/memoryService.hpp"
69 #include "services/runtimeService.hpp"
70 #include "services/threadService.hpp"
71 #include "utilities/debug.hpp"
72 #include "utilities/formatBuffer.hpp"
73 #include "utilities/macros.hpp"
74
75 PerfVariable* Management::_begin_vm_creation_time = nullptr;
76 PerfVariable* Management::_end_vm_creation_time = nullptr;
77 PerfVariable* Management::_vm_init_done_time = nullptr;
78
79 InstanceKlass* Management::_diagnosticCommandImpl_klass = nullptr;
80 InstanceKlass* Management::_garbageCollectorExtImpl_klass = nullptr;
81 InstanceKlass* Management::_garbageCollectorMXBean_klass = nullptr;
82 InstanceKlass* Management::_gcInfo_klass = nullptr;
83 InstanceKlass* Management::_managementFactoryHelper_klass = nullptr;
84 InstanceKlass* Management::_memoryManagerMXBean_klass = nullptr;
85 InstanceKlass* Management::_memoryPoolMXBean_klass = nullptr;
86 InstanceKlass* Management::_memoryUsage_klass = nullptr;
87 InstanceKlass* Management::_sensor_klass = nullptr;
88 InstanceKlass* Management::_threadInfo_klass = nullptr;
89
90 jmmOptionalSupport Management::_optional_support = {0};
91 TimeStamp Management::_stamp;
92
93 void management_init() {
94 #if INCLUDE_MANAGEMENT
95 Management::init();
96 ThreadService::init();
97 RuntimeService::init();
98 ClassLoadingService::init();
99 FinalizerService::init();
100 #else
101 ThreadService::init();
102 #endif // INCLUDE_MANAGEMENT
103 }
104
105 #if INCLUDE_MANAGEMENT
106
107 void Management::init() {
108 EXCEPTION_MARK;
109
110 // These counters are for java.lang.management API support.
111 // They are created even if -XX:-UsePerfData is set and in
112 // that case, they will be allocated on C heap.
113
114 _begin_vm_creation_time =
115 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
116 PerfData::U_None, CHECK);
117
118 _end_vm_creation_time =
119 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
120 PerfData::U_None, CHECK);
121
122 _vm_init_done_time =
123 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
124 PerfData::U_None, CHECK);
125
126 // Initialize optional support
127 _optional_support.isLowMemoryDetectionSupported = 1;
128 _optional_support.isCompilationTimeMonitoringSupported = 1;
129 _optional_support.isThreadContentionMonitoringSupported = 1;
130
131 if (os::is_thread_cpu_time_supported()) {
132 _optional_support.isCurrentThreadCpuTimeSupported = 1;
133 _optional_support.isOtherThreadCpuTimeSupported = 1;
134 } else {
135 _optional_support.isCurrentThreadCpuTimeSupported = 0;
136 _optional_support.isOtherThreadCpuTimeSupported = 0;
137 }
138
139 _optional_support.isObjectMonitorUsageSupported = 1;
140 #if INCLUDE_SERVICES
141 // This depends on the heap inspector
142 _optional_support.isSynchronizerUsageSupported = 1;
143 #endif // INCLUDE_SERVICES
144 _optional_support.isThreadAllocatedMemorySupported = 1;
145 _optional_support.isRemoteDiagnosticCommandsSupported = 1;
146
147 // Registration of the diagnostic commands
148 DCmd::register_dcmds();
149 }
150
151 void Management::initialize(TRAPS) {
152 NotificationThread::initialize();
153
154 if (ManagementServer) {
155 ResourceMark rm(THREAD);
156 HandleMark hm(THREAD);
157
158 // Load and initialize the jdk.internal.agent.Agent class
159 // invoke startAgent method to start the management server
160 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
161 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::jdk_internal_agent_Agent(),
162 loader,
163 THREAD);
164 if (k == nullptr) {
165 vm_exit_during_initialization("Management agent initialization failure: "
166 "class jdk.internal.agent.Agent not found.");
167 }
168
169 JavaValue result(T_VOID);
170 JavaCalls::call_static(&result,
171 k,
172 vmSymbols::startAgent_name(),
173 vmSymbols::void_method_signature(),
174 CHECK);
175 }
176 }
177
178 void Management::get_optional_support(jmmOptionalSupport* support) {
179 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
180 }
181
182 InstanceKlass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
183 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
184 return initialize_klass(k, THREAD);
185 }
186
187 InstanceKlass* Management::load_and_initialize_klass_or_null(Symbol* sh, TRAPS) {
188 Klass* k = SystemDictionary::resolve_or_null(sh, CHECK_NULL);
189 if (k == nullptr) {
190 return nullptr;
191 }
192 return initialize_klass(k, THREAD);
193 }
194
195 InstanceKlass* Management::initialize_klass(Klass* k, TRAPS) {
196 InstanceKlass* ik = InstanceKlass::cast(k);
197 if (ik->should_be_initialized()) {
198 ik->initialize(CHECK_NULL);
199 }
200 // If these classes change to not be owned by the boot loader, they need
201 // to be walked to keep their class loader alive in oops_do.
202 assert(ik->class_loader() == nullptr, "need to follow in oops_do");
203 return ik;
204 }
205
206
207 void Management::record_vm_init_completed() {
208 // Initialize the timestamp to get the current time
209 _vm_init_done_time->set_value(os::javaTimeMillis());
210
211 // Update the timestamp to the vm init done time
212 _stamp.update();
213 }
214
215 void Management::record_vm_startup_time(jlong begin, jlong duration) {
216 // if the performance counter is not initialized,
217 // then vm initialization failed; simply return.
218 if (_begin_vm_creation_time == nullptr) return;
219
220 _begin_vm_creation_time->set_value(begin);
221 _end_vm_creation_time->set_value(begin + duration);
222 PerfMemory::set_accessible(true);
223 }
224
225 jlong Management::begin_vm_creation_time() {
226 return _begin_vm_creation_time->get_value();
227 }
228
229 jlong Management::vm_init_done_time() {
230 return _vm_init_done_time->get_value();
231 }
232
233 jlong Management::timestamp() {
234 TimeStamp t;
235 t.update();
236 return t.ticks() - _stamp.ticks();
237 }
238
239 InstanceKlass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
240 if (_threadInfo_klass == nullptr) {
241 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
242 }
243 return _threadInfo_klass;
244 }
245
246 InstanceKlass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
247 if (_memoryUsage_klass == nullptr) {
248 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
249 }
250 return _memoryUsage_klass;
251 }
252
253 InstanceKlass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
254 if (_memoryPoolMXBean_klass == nullptr) {
255 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
256 }
257 return _memoryPoolMXBean_klass;
258 }
259
260 InstanceKlass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
261 if (_memoryManagerMXBean_klass == nullptr) {
262 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
263 }
264 return _memoryManagerMXBean_klass;
265 }
266
267 InstanceKlass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
268 if (_garbageCollectorMXBean_klass == nullptr) {
269 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
270 }
271 return _garbageCollectorMXBean_klass;
272 }
273
274 InstanceKlass* Management::sun_management_Sensor_klass(TRAPS) {
275 if (_sensor_klass == nullptr) {
276 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
277 }
278 return _sensor_klass;
279 }
280
281 InstanceKlass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
282 if (_managementFactoryHelper_klass == nullptr) {
283 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
284 }
285 return _managementFactoryHelper_klass;
286 }
287
288 InstanceKlass* Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS) {
289 if (_garbageCollectorExtImpl_klass == nullptr) {
290 _garbageCollectorExtImpl_klass =
291 load_and_initialize_klass_or_null(vmSymbols::com_sun_management_internal_GarbageCollectorExtImpl(), CHECK_NULL);
292 }
293 return _garbageCollectorExtImpl_klass;
294 }
295
296 InstanceKlass* Management::com_sun_management_GcInfo_klass(TRAPS) {
297 if (_gcInfo_klass == nullptr) {
298 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
299 }
300 return _gcInfo_klass;
301 }
302
303 InstanceKlass* Management::com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS) {
304 if (_diagnosticCommandImpl_klass == nullptr) {
305 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_DiagnosticCommandImpl(), CHECK_NULL);
306 }
307 return _diagnosticCommandImpl_klass;
308 }
309
310 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
311 Handle snapshot_thread(THREAD, snapshot->threadObj());
312
313 jlong contended_time;
314 jlong waited_time;
315 if (ThreadService::is_thread_monitoring_contention()) {
316 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
317 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
318 } else {
319 // set them to -1 if thread contention monitoring is disabled.
320 contended_time = max_julong;
321 waited_time = max_julong;
322 }
323
324 int thread_status = static_cast<int>(snapshot->thread_status());
325 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
326 if (snapshot->is_suspended()) {
327 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
328 }
329 if (snapshot->is_in_native()) {
330 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
331 }
332
333 ThreadStackTrace* st = snapshot->get_stack_trace();
334 Handle stacktrace_h;
335 if (st != nullptr) {
336 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
337 } else {
338 stacktrace_h = Handle();
339 }
340
341 args->push_oop(snapshot_thread);
342 args->push_int(thread_status);
343 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
344 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
345 args->push_long(snapshot->contended_enter_count());
346 args->push_long(contended_time);
347 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
348 args->push_long(waited_time);
349 args->push_oop(stacktrace_h);
350 }
351
352 // Helper function to construct a ThreadInfo object
353 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
354 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
355 JavaCallArguments args(14);
356
357 // initialize the arguments for the ThreadInfo constructor
358 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
359
360 // Call ThreadInfo constructor with no locked monitors and synchronizers
361 Handle element = JavaCalls::construct_new_instance(
362 ik,
363 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
364 &args,
365 CHECK_NULL);
366 return (instanceOop) element();
367 }
368
369 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
370 objArrayHandle monitors_array,
371 typeArrayHandle depths_array,
372 objArrayHandle synchronizers_array,
373 TRAPS) {
374 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
375 JavaCallArguments args(17);
376
377 // initialize the arguments for the ThreadInfo constructor
378 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
379
380 // push the locked monitors and synchronizers in the arguments
381 args.push_oop(monitors_array);
382 args.push_oop(depths_array);
383 args.push_oop(synchronizers_array);
384
385 // Call ThreadInfo constructor with locked monitors and synchronizers
386 Handle element = JavaCalls::construct_new_instance(
387 ik,
388 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
389 &args,
390 CHECK_NULL);
391 return (instanceOop) element();
392 }
393
394
395 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
396 if (mgr == nullptr) {
397 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
398 }
399 oop mgr_obj = JNIHandles::resolve(mgr);
400 instanceHandle h(THREAD, (instanceOop) mgr_obj);
401
402 InstanceKlass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
403 if (!h->is_a(k)) {
404 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
405 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
406 nullptr);
407 }
408
409 MemoryManager* gc = MemoryService::get_memory_manager(h);
410 if (gc == nullptr || !gc->is_gc_memory_manager()) {
411 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
412 "Invalid GC memory manager",
413 nullptr);
414 }
415 return (GCMemoryManager*) gc;
416 }
417
418 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
419 if (obj == nullptr) {
420 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
421 }
422
423 oop pool_obj = JNIHandles::resolve(obj);
424 assert(pool_obj->is_instance(), "Should be an instanceOop");
425 instanceHandle ph(THREAD, (instanceOop) pool_obj);
426
427 return MemoryService::get_memory_pool(ph);
428 }
429
430 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
431 int num_threads = ids_ah->length();
432
433 // Validate input thread IDs
434 int i = 0;
435 for (i = 0; i < num_threads; i++) {
436 jlong tid = ids_ah->long_at(i);
437 if (tid <= 0) {
438 // throw exception if invalid thread id.
439 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
440 "Invalid thread ID entry");
441 }
442 }
443 }
444
445 // Returns true if the JavaThread's Java object is a platform thread
446 static bool is_platform_thread(JavaThread* jt) {
447 if (jt != nullptr) {
448 oop thread_obj = jt->threadObj();
449 return (thread_obj != nullptr) && !thread_obj->is_a(vmClasses::BoundVirtualThread_klass());
450 } else {
451 return false;
452 }
453 }
454
455 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
456 // check if the element of infoArray is of type ThreadInfo class
457 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
458 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
459 if (element_klass != threadinfo_klass) {
460 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
461 "infoArray element type is not ThreadInfo class");
462 }
463 }
464
465 // Returns true if the ThreadSnapshot's Java object is a platform thread
466 static bool is_platform_thread(ThreadSnapshot* ts) {
467 oop thread_obj = ts->threadObj();
468 return (thread_obj != nullptr) && !thread_obj->is_a(vmClasses::BoundVirtualThread_klass());
469 }
470
471 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
472 if (obj == nullptr) {
473 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
474 }
475
476 oop mgr_obj = JNIHandles::resolve(obj);
477 assert(mgr_obj->is_instance(), "Should be an instanceOop");
478 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
479
480 return MemoryService::get_memory_manager(mh);
481 }
482
483 // Returns a version string and sets major and minor version if
484 // the input parameters are non-null.
485 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
486 return JMM_VERSION;
487 JVM_END
488
489 // Gets the list of VM monitoring and management optional supports
490 // Returns 0 if succeeded; otherwise returns non-zero.
491 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
492 if (support == nullptr) {
493 return -1;
494 }
495 Management::get_optional_support(support);
496 return 0;
497 JVM_END
498
499 // Returns an array of java/lang/management/MemoryPoolMXBean object
500 // one for each memory pool if obj == null; otherwise returns
501 // an array of memory pools for a given memory manager if
502 // it is a valid memory manager.
503 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
504 ResourceMark rm(THREAD);
505
506 int num_memory_pools;
507 MemoryManager* mgr = nullptr;
508 if (obj == nullptr) {
509 num_memory_pools = MemoryService::num_memory_pools();
510 } else {
511 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
512 if (mgr == nullptr) {
513 return nullptr;
514 }
515 num_memory_pools = mgr->num_memory_pools();
516 }
517
518 // Allocate the resulting MemoryPoolMXBean[] object
519 InstanceKlass* ik = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
520 objArrayOop r = oopFactory::new_objArray(ik, num_memory_pools, CHECK_NULL);
521 objArrayHandle poolArray(THREAD, r);
522
523 if (mgr == nullptr) {
524 // Get all memory pools
525 for (int i = 0; i < num_memory_pools; i++) {
526 MemoryPool* pool = MemoryService::get_memory_pool(i);
527 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
528 instanceHandle ph(THREAD, p);
529 poolArray->obj_at_put(i, ph());
530 }
531 } else {
532 // Get memory pools managed by a given memory manager
533 for (int i = 0; i < num_memory_pools; i++) {
534 MemoryPool* pool = mgr->get_memory_pool(i);
535 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
536 instanceHandle ph(THREAD, p);
537 poolArray->obj_at_put(i, ph());
538 }
539 }
540 return (jobjectArray) JNIHandles::make_local(THREAD, poolArray());
541 JVM_END
542
543 // Returns an array of java/lang/management/MemoryManagerMXBean object
544 // one for each memory manager if obj == null; otherwise returns
545 // an array of memory managers for a given memory pool if
546 // it is a valid memory pool.
547 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
548 ResourceMark rm(THREAD);
549
550 int num_mgrs;
551 MemoryPool* pool = nullptr;
552 if (obj == nullptr) {
553 num_mgrs = MemoryService::num_memory_managers();
554 } else {
555 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
556 if (pool == nullptr) {
557 return nullptr;
558 }
559 num_mgrs = pool->num_memory_managers();
560 }
561
562 // Allocate the resulting MemoryManagerMXBean[] object
563 InstanceKlass* ik = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
564 objArrayOop r = oopFactory::new_objArray(ik, num_mgrs, CHECK_NULL);
565 objArrayHandle mgrArray(THREAD, r);
566
567 if (pool == nullptr) {
568 // Get all memory managers
569 for (int i = 0; i < num_mgrs; i++) {
570 MemoryManager* mgr = MemoryService::get_memory_manager(i);
571 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
572 instanceHandle ph(THREAD, p);
573 mgrArray->obj_at_put(i, ph());
574 }
575 } else {
576 // Get memory managers for a given memory pool
577 for (int i = 0; i < num_mgrs; i++) {
578 MemoryManager* mgr = pool->get_memory_manager(i);
579 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
580 instanceHandle ph(THREAD, p);
581 mgrArray->obj_at_put(i, ph());
582 }
583 }
584 return (jobjectArray) JNIHandles::make_local(THREAD, mgrArray());
585 JVM_END
586
587
588 // Returns a java/lang/management/MemoryUsage object containing the memory usage
589 // of a given memory pool.
590 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
591 ResourceMark rm(THREAD);
592
593 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
594 if (pool != nullptr) {
595 MemoryUsage usage = pool->get_memory_usage();
596 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
597 return JNIHandles::make_local(THREAD, h());
598 } else {
599 return nullptr;
600 }
601 JVM_END
602
603 // Returns a java/lang/management/MemoryUsage object containing the memory usage
604 // of a given memory pool.
605 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
606 ResourceMark rm(THREAD);
607
608 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
609 if (pool != nullptr) {
610 MemoryUsage usage = pool->get_peak_memory_usage();
611 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
612 return JNIHandles::make_local(THREAD, h());
613 } else {
614 return nullptr;
615 }
616 JVM_END
617
618 // Returns a java/lang/management/MemoryUsage object containing the memory usage
619 // of a given memory pool after most recent GC.
620 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
621 ResourceMark rm(THREAD);
622
623 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
624 if (pool != nullptr && pool->is_collected_pool()) {
625 MemoryUsage usage = pool->get_last_collection_usage();
626 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
627 return JNIHandles::make_local(THREAD, h());
628 } else {
629 return nullptr;
630 }
631 JVM_END
632
633 // Sets the memory pool sensor for a threshold type
634 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
635 if (obj == nullptr || sensorObj == nullptr) {
636 THROW(vmSymbols::java_lang_NullPointerException());
637 }
638
639 InstanceKlass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
640 oop s = JNIHandles::resolve(sensorObj);
641 assert(s->is_instance(), "Sensor should be an instanceOop");
642 instanceHandle sensor_h(THREAD, (instanceOop) s);
643 if (!sensor_h->is_a(sensor_klass)) {
644 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
645 "Sensor is not an instance of sun.management.Sensor class");
646 }
647
648 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
649 assert(mpool != nullptr, "MemoryPool should exist");
650
651 switch (type) {
652 case JMM_USAGE_THRESHOLD_HIGH:
653 case JMM_USAGE_THRESHOLD_LOW:
654 // have only one sensor for threshold high and low
655 mpool->set_usage_sensor_obj(sensor_h);
656 break;
657 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
658 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
659 // have only one sensor for threshold high and low
660 mpool->set_gc_usage_sensor_obj(sensor_h);
661 break;
662 default:
663 assert(false, "Unrecognized type");
664 }
665
666 JVM_END
667
668
669 // Sets the threshold of a given memory pool.
670 // Returns the previous threshold.
671 //
672 // Input parameters:
673 // pool - the MemoryPoolMXBean object
674 // type - threshold type
675 // threshold - the new threshold (must not be negative)
676 //
677 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
678 if (threshold < 0) {
679 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
680 "Invalid threshold value",
681 -1);
682 }
683
684 if ((size_t)threshold > max_uintx) {
685 stringStream st;
686 st.print("Invalid valid threshold value. Threshold value (" JLONG_FORMAT ") > max value of size_t (%zu)", threshold, max_uintx);
687 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
688 }
689
690 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
691 assert(pool != nullptr, "MemoryPool should exist");
692
693 jlong prev = 0;
694 switch (type) {
695 case JMM_USAGE_THRESHOLD_HIGH:
696 if (!pool->usage_threshold()->is_high_threshold_supported()) {
697 return -1;
698 }
699 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
700 break;
701
702 case JMM_USAGE_THRESHOLD_LOW:
703 if (!pool->usage_threshold()->is_low_threshold_supported()) {
704 return -1;
705 }
706 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
707 break;
708
709 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
710 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
711 return -1;
712 }
713 // return and the new threshold is effective for the next GC
714 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
715
716 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
717 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
718 return -1;
719 }
720 // return and the new threshold is effective for the next GC
721 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
722
723 default:
724 assert(false, "Unrecognized type");
725 return -1;
726 }
727
728 // When the threshold is changed, reevaluate if the low memory
729 // detection is enabled.
730 if (prev != threshold) {
731 LowMemoryDetector::recompute_enabled_for_collected_pools();
732 LowMemoryDetector::detect_low_memory(pool);
733 }
734 return prev;
735 JVM_END
736
737 // Returns a java/lang/management/MemoryUsage object representing
738 // the memory usage for the heap or non-heap memory.
739 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
740 ResourceMark rm(THREAD);
741
742 MemoryUsage usage;
743
744 if (heap) {
745 usage = Universe::heap()->memory_usage();
746 } else {
747 // Calculate the memory usage by summing up the pools.
748 size_t total_init = 0;
749 size_t total_used = 0;
750 size_t total_committed = 0;
751 size_t total_max = 0;
752 bool has_undefined_init_size = false;
753 bool has_undefined_max_size = false;
754
755 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
756 MemoryPool* pool = MemoryService::get_memory_pool(i);
757 if (pool->is_non_heap()) {
758 MemoryUsage u = pool->get_memory_usage();
759 total_used += u.used();
760 total_committed += u.committed();
761
762 if (u.init_size() == MemoryUsage::undefined_size()) {
763 has_undefined_init_size = true;
764 }
765 if (!has_undefined_init_size) {
766 total_init += u.init_size();
767 }
768
769 if (u.max_size() == MemoryUsage::undefined_size()) {
770 has_undefined_max_size = true;
771 }
772 if (!has_undefined_max_size) {
773 total_max += u.max_size();
774 }
775 }
776 }
777
778 // if any one of the memory pool has undefined init_size or max_size,
779 // set it to MemoryUsage::undefined_size()
780 if (has_undefined_init_size) {
781 total_init = MemoryUsage::undefined_size();
782 }
783 if (has_undefined_max_size) {
784 total_max = MemoryUsage::undefined_size();
785 }
786
787 usage = MemoryUsage(total_init, total_used, total_committed, total_max);
788 }
789
790 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
791 return JNIHandles::make_local(THREAD, obj());
792 JVM_END
793
794 // Returns the boolean value of a given attribute.
795 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
796 switch (att) {
797 case JMM_VERBOSE_GC:
798 return MemoryService::get_verbose();
799 case JMM_VERBOSE_CLASS:
800 return ClassLoadingService::get_verbose();
801 case JMM_THREAD_CONTENTION_MONITORING:
802 return ThreadService::is_thread_monitoring_contention();
803 case JMM_THREAD_CPU_TIME:
804 return ThreadService::is_thread_cpu_time_enabled();
805 case JMM_THREAD_ALLOCATED_MEMORY:
806 return ThreadService::is_thread_allocated_memory_enabled();
807 default:
808 assert(0, "Unrecognized attribute");
809 return false;
810 }
811 JVM_END
812
813 // Sets the given boolean attribute and returns the previous value.
814 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
815 switch (att) {
816 case JMM_VERBOSE_GC:
817 return MemoryService::set_verbose(flag != 0);
818 case JMM_VERBOSE_CLASS:
819 return ClassLoadingService::set_verbose(flag != 0);
820 case JMM_THREAD_CONTENTION_MONITORING:
821 return ThreadService::set_thread_monitoring_contention(flag != 0);
822 case JMM_THREAD_CPU_TIME:
823 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
824 case JMM_THREAD_ALLOCATED_MEMORY:
825 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
826 default:
827 assert(0, "Unrecognized attribute");
828 return false;
829 }
830 JVM_END
831
832
833 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
834 switch (att) {
835 case JMM_GC_TIME_MS:
836 return mgr->gc_time_ms();
837
838 case JMM_GC_COUNT:
839 return mgr->gc_count();
840
841 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
842 // current implementation only has 1 ext attribute
843 return 1;
844
845 default:
846 assert(0, "Unrecognized GC attribute");
847 return -1;
848 }
849 }
850
851 class VmThreadCountClosure: public ThreadClosure {
852 private:
853 int _count;
854 public:
855 VmThreadCountClosure() : _count(0) {};
856 void do_thread(Thread* thread);
857 int count() { return _count; }
858 };
859
860 void VmThreadCountClosure::do_thread(Thread* thread) {
861 // exclude externally visible JavaThreads
862 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
863 return;
864 }
865
866 _count++;
867 }
868
869 static jint get_vm_thread_count() {
870 VmThreadCountClosure vmtcc;
871 {
872 MutexLocker ml(Threads_lock);
873 Threads::threads_do(&vmtcc);
874 }
875
876 return vmtcc.count();
877 }
878
879 static jint get_num_flags() {
880 // last flag entry is always null, so subtract 1
881 int nFlags = (int) JVMFlag::numFlags - 1;
882 int count = 0;
883 for (int i = 0; i < nFlags; i++) {
884 JVMFlag* flag = &JVMFlag::flags[i];
885 // Exclude the locked (diagnostic, experimental) flags
886 if (flag->is_unlocked() || flag->is_unlocker()) {
887 count++;
888 }
889 }
890 return count;
891 }
892
893 static jlong get_long_attribute(jmmLongAttribute att) {
894 switch (att) {
895 case JMM_CLASS_LOADED_COUNT:
896 return ClassLoadingService::loaded_class_count();
897
898 case JMM_CLASS_UNLOADED_COUNT:
899 return ClassLoadingService::unloaded_class_count();
900
901 case JMM_THREAD_TOTAL_COUNT:
902 return ThreadService::get_total_thread_count();
903
904 case JMM_THREAD_LIVE_COUNT:
905 return ThreadService::get_live_thread_count();
906
907 case JMM_THREAD_PEAK_COUNT:
908 return ThreadService::get_peak_thread_count();
909
910 case JMM_THREAD_DAEMON_COUNT:
911 return ThreadService::get_daemon_thread_count();
912
913 case JMM_JVM_INIT_DONE_TIME_MS:
914 return Management::vm_init_done_time();
915
916 case JMM_JVM_UPTIME_MS:
917 return Management::ticks_to_ms(os::elapsed_counter());
918
919 case JMM_COMPILE_TOTAL_TIME_MS:
920 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
921
922 case JMM_OS_PROCESS_ID:
923 return os::current_process_id();
924
925 // Hotspot-specific counters
926 case JMM_CLASS_LOADED_BYTES:
927 return ClassLoadingService::loaded_class_bytes();
928
929 case JMM_CLASS_UNLOADED_BYTES:
930 return ClassLoadingService::unloaded_class_bytes();
931
932 case JMM_SHARED_CLASS_LOADED_COUNT:
933 return ClassLoadingService::loaded_shared_class_count();
934
935 case JMM_SHARED_CLASS_UNLOADED_COUNT:
936 return ClassLoadingService::unloaded_shared_class_count();
937
938
939 case JMM_SHARED_CLASS_LOADED_BYTES:
940 return ClassLoadingService::loaded_shared_class_bytes();
941
942 case JMM_SHARED_CLASS_UNLOADED_BYTES:
943 return ClassLoadingService::unloaded_shared_class_bytes();
944
945 case JMM_TOTAL_CLASSLOAD_TIME_MS:
946 return ClassLoader::classloader_time_ms();
947
948 case JMM_VM_GLOBAL_COUNT:
949 return get_num_flags();
950
951 case JMM_SAFEPOINT_COUNT:
952 return RuntimeService::safepoint_count();
953
954 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
955 return RuntimeService::safepoint_sync_time_ms();
956
957 case JMM_TOTAL_STOPPED_TIME_MS:
958 return RuntimeService::safepoint_time_ms();
959
960 case JMM_TOTAL_APP_TIME_MS:
961 return RuntimeService::application_time_ms();
962
963 case JMM_VM_THREAD_COUNT:
964 return get_vm_thread_count();
965
966 case JMM_CLASS_INIT_TOTAL_COUNT:
967 return ClassLoader::class_init_count();
968
969 case JMM_CLASS_INIT_TOTAL_TIME_MS:
970 return ClassLoader::class_init_time_ms();
971
972 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
973 return ClassLoader::class_verify_time_ms();
974
975 case JMM_METHOD_DATA_SIZE_BYTES:
976 return ClassLoadingService::class_method_data_size();
977
978 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
979 return os::physical_memory();
980
981 default:
982 return -1;
983 }
984 }
985
986
987 // Returns the long value of a given attribute.
988 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
989 if (obj == nullptr) {
990 return get_long_attribute(att);
991 } else {
992 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
993 if (mgr != nullptr) {
994 return get_gc_attribute(mgr, att);
995 }
996 }
997 return -1;
998 JVM_END
999
1000 // Gets the value of all attributes specified in the given array
1001 // and sets the value in the result array.
1002 // Returns the number of attributes found.
1003 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1004 jobject obj,
1005 jmmLongAttribute* atts,
1006 jint count,
1007 jlong* result))
1008
1009 int num_atts = 0;
1010 if (obj == nullptr) {
1011 for (int i = 0; i < count; i++) {
1012 result[i] = get_long_attribute(atts[i]);
1013 if (result[i] != -1) {
1014 num_atts++;
1015 }
1016 }
1017 } else {
1018 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1019 for (int i = 0; i < count; i++) {
1020 result[i] = get_gc_attribute(mgr, atts[i]);
1021 if (result[i] != -1) {
1022 num_atts++;
1023 }
1024 }
1025 }
1026 return num_atts;
1027 JVM_END
1028
1029 // Helper function to do thread dump for a specific list of threads
1030 static void do_thread_dump(ThreadDumpResult* dump_result,
1031 typeArrayHandle ids_ah, // array of thread ID (long[])
1032 int num_threads,
1033 int max_depth,
1034 bool with_locked_monitors,
1035 bool with_locked_synchronizers,
1036 TRAPS) {
1037 // no need to actually perform thread dump if no TIDs are specified
1038 if (num_threads == 0) return;
1039
1040 // First get an array of threadObj handles.
1041 // A JavaThread may terminate before we get the stack trace.
1042 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1043
1044 {
1045 // Need this ThreadsListHandle for converting Java thread IDs into
1046 // threadObj handles; dump_result->set_t_list() is called in the
1047 // VM op below so we can't use it yet.
1048 ThreadsListHandle tlh;
1049 for (int i = 0; i < num_threads; i++) {
1050 jlong tid = ids_ah->long_at(i);
1051 JavaThread* jt = tlh.list()->find_JavaThread_from_java_tid(tid);
1052 oop thread_obj = is_platform_thread(jt) ? jt->threadObj() : (oop)nullptr;
1053 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1054 thread_handle_array->append(threadObj_h);
1055 }
1056 }
1057
1058 // Obtain thread dumps and thread snapshot information
1059 VM_ThreadDump op(dump_result,
1060 thread_handle_array,
1061 num_threads,
1062 max_depth, /* stack depth */
1063 with_locked_monitors,
1064 with_locked_synchronizers);
1065 VMThread::execute(&op);
1066 }
1067
1068 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1069 // for the thread ID specified in the corresponding entry in
1070 // the given array of thread IDs; or null if the thread does not exist
1071 // or has terminated.
1072 //
1073 // Input parameters:
1074 // ids - array of thread IDs
1075 // maxDepth - the maximum depth of stack traces to be dumped:
1076 // maxDepth == -1 requests to dump entire stack trace.
1077 // maxDepth == 0 requests no stack trace.
1078 // infoArray - array of ThreadInfo objects
1079 //
1080 // QQQ - Why does this method return a value instead of void?
1081 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1082 // Check if threads is null
1083 if (ids == nullptr || infoArray == nullptr) {
1084 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1085 }
1086
1087 if (maxDepth < -1) {
1088 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1089 "Invalid maxDepth", -1);
1090 }
1091
1092 ResourceMark rm(THREAD);
1093 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1094 typeArrayHandle ids_ah(THREAD, ta);
1095
1096 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1097 objArrayOop oa = objArrayOop(infoArray_obj);
1098 objArrayHandle infoArray_h(THREAD, oa);
1099
1100 // validate the thread id array
1101 validate_thread_id_array(ids_ah, CHECK_0);
1102
1103 // validate the ThreadInfo[] parameters
1104 validate_thread_info_array(infoArray_h, CHECK_0);
1105
1106 // infoArray must be of the same length as the given array of thread IDs
1107 int num_threads = ids_ah->length();
1108 if (num_threads != infoArray_h->length()) {
1109 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1110 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1111 }
1112
1113 // Must use ThreadDumpResult to store the ThreadSnapshot.
1114 // GC may occur after the thread snapshots are taken but before
1115 // this function returns. The threadObj and other oops kept
1116 // in the ThreadSnapshot are marked and adjusted during GC.
1117 ThreadDumpResult dump_result(num_threads);
1118
1119 if (maxDepth == 0) {
1120 // No stack trace to dump so we do not need to stop the world.
1121 // Since we never do the VM op here we must set the threads list.
1122 dump_result.set_t_list();
1123 for (int i = 0; i < num_threads; i++) {
1124 jlong tid = ids_ah->long_at(i);
1125 JavaThread* jt = dump_result.t_list()->find_JavaThread_from_java_tid(tid);
1126 if (jt == nullptr) {
1127 // if the thread does not exist or now it is terminated,
1128 // create dummy snapshot
1129 dump_result.add_thread_snapshot();
1130 } else {
1131 dump_result.add_thread_snapshot(jt);
1132 }
1133 }
1134 } else {
1135 // obtain thread dump with the specific list of threads with stack trace
1136 do_thread_dump(&dump_result,
1137 ids_ah,
1138 num_threads,
1139 maxDepth,
1140 false, /* no locked monitor */
1141 false, /* no locked synchronizers */
1142 CHECK_0);
1143 }
1144
1145 int num_snapshots = dump_result.num_snapshots();
1146 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1147 assert(num_snapshots == 0 || dump_result.t_list_has_been_set(), "ThreadsList must have been set if we have a snapshot");
1148 int index = 0;
1149 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != nullptr; index++, ts = ts->next()) {
1150 // For each thread, create an java/lang/management/ThreadInfo object
1151 // and fill with the thread information
1152
1153 if (!is_platform_thread(ts)) {
1154 // if the thread does not exist, has terminated, or is a virtual thread, then set threadinfo to null
1155 infoArray_h->obj_at_put(index, nullptr);
1156 continue;
1157 }
1158
1159 // Create java.lang.management.ThreadInfo object
1160 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1161 infoArray_h->obj_at_put(index, info_obj);
1162 }
1163 return 0;
1164 JVM_END
1165
1166 // Dump thread info for the specified threads.
1167 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1168 // for the thread ID specified in the corresponding entry in
1169 // the given array of thread IDs; or null if the thread does not exist
1170 // or has terminated.
1171 //
1172 // Input parameter:
1173 // ids - array of thread IDs; null indicates all live threads
1174 // locked_monitors - if true, dump locked object monitors
1175 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1176 //
1177 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors,
1178 jboolean locked_synchronizers, jint maxDepth))
1179 ResourceMark rm(THREAD);
1180
1181 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1182 int num_threads = (ta != nullptr ? ta->length() : 0);
1183 typeArrayHandle ids_ah(THREAD, ta);
1184
1185 ThreadDumpResult dump_result(num_threads); // can safepoint
1186
1187 if (ids_ah() != nullptr) {
1188
1189 // validate the thread id array
1190 validate_thread_id_array(ids_ah, CHECK_NULL);
1191
1192 // obtain thread dump of a specific list of threads
1193 do_thread_dump(&dump_result,
1194 ids_ah,
1195 num_threads,
1196 maxDepth, /* stack depth */
1197 (locked_monitors ? true : false), /* with locked monitors */
1198 (locked_synchronizers ? true : false), /* with locked synchronizers */
1199 CHECK_NULL);
1200 } else {
1201 // obtain thread dump of all threads
1202 VM_ThreadDump op(&dump_result,
1203 maxDepth, /* stack depth */
1204 (locked_monitors ? true : false), /* with locked monitors */
1205 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1206 VMThread::execute(&op);
1207 }
1208
1209 int num_snapshots = dump_result.num_snapshots();
1210 assert(num_snapshots == 0 || dump_result.t_list_has_been_set(), "ThreadsList must have been set if we have a snapshot");
1211
1212 // create the result ThreadInfo[] object
1213 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1214 objArrayOop r = oopFactory::new_objArray(ik, num_snapshots, CHECK_NULL);
1215 objArrayHandle result_h(THREAD, r);
1216
1217 int index = 0;
1218 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != nullptr; ts = ts->next(), index++) {
1219 if (!is_platform_thread(ts)) {
1220 // if the thread does not exist, has terminated, or is a virtual thread, then set threadinfo to null
1221 result_h->obj_at_put(index, nullptr);
1222 continue;
1223 }
1224
1225 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1226 assert(stacktrace != nullptr, "Must have a stack trace dumped");
1227
1228 // Create Object[] filled with locked monitors
1229 // Create int[] filled with the stack depth where a monitor was locked
1230 int num_frames = stacktrace->get_stack_depth();
1231 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1232
1233 // Count the total number of locked monitors
1234 for (int i = 0; i < num_frames; i++) {
1235 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1236 num_locked_monitors += frame->num_locked_monitors();
1237 }
1238
1239 objArrayHandle monitors_array;
1240 typeArrayHandle depths_array;
1241 objArrayHandle synchronizers_array;
1242
1243 if (locked_monitors) {
1244 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1245 // where the thread locked it
1246 objArrayOop array = oopFactory::new_objArray(vmClasses::Object_klass(), num_locked_monitors, CHECK_NULL);
1247 objArrayHandle mh(THREAD, array);
1248 monitors_array = mh;
1249
1250 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1251 typeArrayHandle dh(THREAD, tarray);
1252 depths_array = dh;
1253
1254 int count = 0;
1255 int j = 0;
1256 for (int depth = 0; depth < num_frames; depth++) {
1257 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1258 int len = frame->num_locked_monitors();
1259 GrowableArray<OopHandle>* locked_monitors = frame->locked_monitors();
1260 for (j = 0; j < len; j++) {
1261 oop monitor = locked_monitors->at(j).resolve();
1262 assert(monitor != nullptr, "must be a Java object");
1263 monitors_array->obj_at_put(count, monitor);
1264 depths_array->int_at_put(count, depth);
1265 count++;
1266 }
1267 }
1268
1269 GrowableArray<OopHandle>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1270 for (j = 0; j < jni_locked_monitors->length(); j++) {
1271 oop object = jni_locked_monitors->at(j).resolve();
1272 assert(object != nullptr, "must be a Java object");
1273 monitors_array->obj_at_put(count, object);
1274 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1275 depths_array->int_at_put(count, -1);
1276 count++;
1277 }
1278 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1279 }
1280
1281 if (locked_synchronizers) {
1282 // Create Object[] filled with locked JSR-166 synchronizers
1283 assert(ts->threadObj() != nullptr, "Must be a valid JavaThread");
1284 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1285 GrowableArray<OopHandle>* locks = (tcl != nullptr ? tcl->owned_locks() : nullptr);
1286 int num_locked_synchronizers = (locks != nullptr ? locks->length() : 0);
1287
1288 objArrayOop array = oopFactory::new_objArray(vmClasses::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1289 objArrayHandle sh(THREAD, array);
1290 synchronizers_array = sh;
1291
1292 for (int k = 0; k < num_locked_synchronizers; k++) {
1293 synchronizers_array->obj_at_put(k, locks->at(k).resolve());
1294 }
1295 }
1296
1297 // Create java.lang.management.ThreadInfo object
1298 instanceOop info_obj = Management::create_thread_info_instance(ts,
1299 monitors_array,
1300 depths_array,
1301 synchronizers_array,
1302 CHECK_NULL);
1303 result_h->obj_at_put(index, info_obj);
1304 }
1305
1306 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
1307 JVM_END
1308
1309 // Reset statistic. Return true if the requested statistic is reset.
1310 // Otherwise, return false.
1311 //
1312 // Input parameters:
1313 // obj - specify which instance the statistic associated with to be reset
1314 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1315 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1316 // type - the type of statistic to be reset
1317 //
1318 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1319 ResourceMark rm(THREAD);
1320
1321 switch (type) {
1322 case JMM_STAT_PEAK_THREAD_COUNT:
1323 ThreadService::reset_peak_thread_count();
1324 return true;
1325
1326 case JMM_STAT_THREAD_CONTENTION_COUNT:
1327 case JMM_STAT_THREAD_CONTENTION_TIME: {
1328 jlong tid = obj.j;
1329 if (tid < 0) {
1330 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1331 }
1332
1333 // Look for the JavaThread of this given tid
1334 JavaThreadIteratorWithHandle jtiwh;
1335 if (tid == 0) {
1336 // reset contention statistics for all threads if tid == 0
1337 for (; JavaThread *java_thread = jtiwh.next(); ) {
1338 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1339 ThreadService::reset_contention_count_stat(java_thread);
1340 } else {
1341 ThreadService::reset_contention_time_stat(java_thread);
1342 }
1343 }
1344 } else {
1345 // reset contention statistics for a given thread
1346 JavaThread* java_thread = jtiwh.list()->find_JavaThread_from_java_tid(tid);
1347 if (java_thread == nullptr) {
1348 return false;
1349 }
1350
1351 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1352 ThreadService::reset_contention_count_stat(java_thread);
1353 } else {
1354 ThreadService::reset_contention_time_stat(java_thread);
1355 }
1356 }
1357 return true;
1358 break;
1359 }
1360 case JMM_STAT_PEAK_POOL_USAGE: {
1361 jobject o = obj.l;
1362 if (o == nullptr) {
1363 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1364 }
1365
1366 oop pool_obj = JNIHandles::resolve(o);
1367 assert(pool_obj->is_instance(), "Should be an instanceOop");
1368 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1369
1370 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1371 if (pool != nullptr) {
1372 pool->reset_peak_memory_usage();
1373 return true;
1374 }
1375 break;
1376 }
1377 case JMM_STAT_GC_STAT: {
1378 jobject o = obj.l;
1379 if (o == nullptr) {
1380 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1381 }
1382
1383 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_false);
1384 if (mgr != nullptr) {
1385 mgr->reset_gc_stat();
1386 return true;
1387 }
1388 break;
1389 }
1390 default:
1391 assert(0, "Unknown Statistic Type");
1392 }
1393 return false;
1394 JVM_END
1395
1396 // Returns the fast estimate of CPU time consumed by
1397 // a given thread (in nanoseconds).
1398 // If thread_id == 0, return CPU time for the current thread.
1399 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1400 if (!os::is_thread_cpu_time_supported()) {
1401 return -1;
1402 }
1403
1404 if (thread_id < 0) {
1405 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1406 "Invalid thread ID", -1);
1407 }
1408
1409 JavaThread* java_thread = nullptr;
1410 if (thread_id == 0) {
1411 // current thread
1412 return os::current_thread_cpu_time();
1413 } else {
1414 ThreadsListHandle tlh;
1415 java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
1416 if (is_platform_thread(java_thread)) {
1417 return os::thread_cpu_time((Thread*) java_thread);
1418 }
1419 }
1420 return -1;
1421 JVM_END
1422
1423 // Returns a String array of all VM global flag names
1424 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1425 // last flag entry is always null, so subtract 1
1426 int nFlags = (int) JVMFlag::numFlags - 1;
1427 // allocate a temp array
1428 objArrayOop r = oopFactory::new_objArray(vmClasses::String_klass(),
1429 nFlags, CHECK_NULL);
1430 objArrayHandle flags_ah(THREAD, r);
1431 int num_entries = 0;
1432 for (int i = 0; i < nFlags; i++) {
1433 JVMFlag* flag = &JVMFlag::flags[i];
1434 // Exclude develop flags in product builds.
1435 if (flag->is_constant_in_binary()) {
1436 continue;
1437 }
1438 // Exclude the locked (experimental, diagnostic) flags
1439 if (flag->is_unlocked() || flag->is_unlocker()) {
1440 Handle s = java_lang_String::create_from_str(flag->name(), CHECK_NULL);
1441 flags_ah->obj_at_put(num_entries, s());
1442 num_entries++;
1443 }
1444 }
1445
1446 if (num_entries < nFlags) {
1447 // Return array of right length
1448 objArrayOop res = oopFactory::new_objArray(vmClasses::String_klass(), num_entries, CHECK_NULL);
1449 for(int i = 0; i < num_entries; i++) {
1450 res->obj_at_put(i, flags_ah->obj_at(i));
1451 }
1452 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1453 }
1454
1455 return (jobjectArray)JNIHandles::make_local(THREAD, flags_ah());
1456 JVM_END
1457
1458 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1459 // can't be determined, true otherwise. If false is returned, then *global
1460 // will be incomplete and invalid.
1461 static bool add_global_entry(Handle name, jmmVMGlobal *global, JVMFlag *flag, TRAPS) {
1462 Handle flag_name;
1463 if (name() == nullptr) {
1464 flag_name = java_lang_String::create_from_str(flag->name(), CHECK_false);
1465 } else {
1466 flag_name = name;
1467 }
1468 global->name = (jstring)JNIHandles::make_local(THREAD, flag_name());
1469
1470 if (flag->is_bool()) {
1471 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1472 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1473 } else if (flag->is_int()) {
1474 global->value.j = (jlong)flag->get_int();
1475 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1476 } else if (flag->is_uint()) {
1477 global->value.j = (jlong)flag->get_uint();
1478 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1479 } else if (flag->is_intx()) {
1480 global->value.j = (jlong)flag->get_intx();
1481 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1482 } else if (flag->is_uintx()) {
1483 global->value.j = (jlong)flag->get_uintx();
1484 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1485 } else if (flag->is_uint64_t()) {
1486 global->value.j = (jlong)flag->get_uint64_t();
1487 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1488 } else if (flag->is_double()) {
1489 global->value.d = (jdouble)flag->get_double();
1490 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE;
1491 } else if (flag->is_size_t()) {
1492 global->value.j = (jlong)flag->get_size_t();
1493 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1494 } else if (flag->is_ccstr()) {
1495 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1496 global->value.l = (jobject)JNIHandles::make_local(THREAD, str());
1497 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1498 } else {
1499 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1500 return false;
1501 }
1502
1503 global->writeable = flag->is_writeable();
1504 global->external = flag->is_external();
1505 switch (flag->get_origin()) {
1506 case JVMFlagOrigin::DEFAULT:
1507 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1508 break;
1509 case JVMFlagOrigin::COMMAND_LINE:
1510 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1511 break;
1512 case JVMFlagOrigin::ENVIRON_VAR:
1513 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1514 break;
1515 case JVMFlagOrigin::CONFIG_FILE:
1516 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1517 break;
1518 case JVMFlagOrigin::MANAGEMENT:
1519 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1520 break;
1521 case JVMFlagOrigin::ERGONOMIC:
1522 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1523 break;
1524 case JVMFlagOrigin::ATTACH_ON_DEMAND:
1525 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND;
1526 break;
1527 default:
1528 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1529 }
1530
1531 return true;
1532 }
1533
1534 // Fill globals array of count length with jmmVMGlobal entries
1535 // specified by names. If names == null, fill globals array
1536 // with all Flags. Return value is number of entries
1537 // created in globals.
1538 // If a JVMFlag with a given name in an array element does not
1539 // exist, globals[i].name will be set to null.
1540 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1541 jobjectArray names,
1542 jmmVMGlobal *globals,
1543 jint count))
1544
1545
1546 if (globals == nullptr) {
1547 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1548 }
1549
1550 ResourceMark rm(THREAD);
1551
1552 if (names != nullptr) {
1553 // return the requested globals
1554 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1555 objArrayHandle names_ah(THREAD, ta);
1556 // Make sure we have a String array
1557 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1558 if (element_klass != vmClasses::String_klass()) {
1559 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1560 "Array element type is not String class", 0);
1561 }
1562
1563 int names_length = names_ah->length();
1564 int num_entries = 0;
1565 for (int i = 0; i < names_length && i < count; i++) {
1566 oop s = names_ah->obj_at(i);
1567 if (s == nullptr) {
1568 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1569 }
1570
1571 Handle sh(THREAD, s);
1572 char* str = java_lang_String::as_utf8_string(s);
1573 JVMFlag* flag = JVMFlag::find_flag(str);
1574 if (flag != nullptr &&
1575 add_global_entry(sh, &globals[i], flag, THREAD)) {
1576 num_entries++;
1577 } else {
1578 globals[i].name = nullptr;
1579 }
1580 }
1581 return num_entries;
1582 } else {
1583 // return all globals if names == null
1584
1585 // last flag entry is always null, so subtract 1
1586 int nFlags = (int) JVMFlag::numFlags - 1;
1587 Handle null_h;
1588 int num_entries = 0;
1589 for (int i = 0; i < nFlags && num_entries < count; i++) {
1590 JVMFlag* flag = &JVMFlag::flags[i];
1591 // Exclude develop flags in product builds.
1592 if (flag->is_constant_in_binary()) {
1593 continue;
1594 }
1595 // Exclude the locked (diagnostic, experimental) flags
1596 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1597 add_global_entry(null_h, &globals[num_entries], flag, THREAD)) {
1598 num_entries++;
1599 }
1600 }
1601 return num_entries;
1602 }
1603 JVM_END
1604
1605 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1606 ResourceMark rm(THREAD);
1607
1608 oop fn = JNIHandles::resolve_external_guard(flag_name);
1609 if (fn == nullptr) {
1610 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1611 "The flag name cannot be null.");
1612 }
1613 char* name = java_lang_String::as_utf8_string(fn);
1614
1615 FormatBuffer<80> error_msg("%s", "");
1616 int succeed = WriteableFlags::set_flag(name, new_value, JVMFlagOrigin::MANAGEMENT, error_msg);
1617
1618 if (succeed != JVMFlag::SUCCESS) {
1619 if (succeed == JVMFlag::MISSING_VALUE) {
1620 // missing value causes NPE to be thrown
1621 THROW(vmSymbols::java_lang_NullPointerException());
1622 } else {
1623 // all the other errors are reported as IAE with the appropriate error message
1624 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1625 error_msg.buffer());
1626 }
1627 }
1628 assert(succeed == JVMFlag::SUCCESS, "Setting flag should succeed");
1629 JVM_END
1630
1631 class ThreadTimesClosure: public ThreadClosure {
1632 private:
1633 objArrayHandle _names_strings;
1634 char **_names_chars;
1635 typeArrayHandle _times;
1636 int _names_len;
1637 int _times_len;
1638 int _count;
1639
1640 public:
1641 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1642 ~ThreadTimesClosure();
1643 virtual void do_thread(Thread* thread);
1644 void do_unlocked(TRAPS);
1645 int count() { return _count; }
1646 };
1647
1648 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1649 typeArrayHandle times) {
1650 assert(names() != nullptr, "names was null");
1651 assert(times() != nullptr, "times was null");
1652 _names_strings = names;
1653 _names_len = names->length();
1654 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1655 _times = times;
1656 _times_len = times->length();
1657 _count = 0;
1658 }
1659
1660 //
1661 // Called with Threads_lock held
1662 //
1663 void ThreadTimesClosure::do_thread(Thread* thread) {
1664 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
1665 assert(thread != nullptr, "thread was null");
1666
1667 // exclude externally visible JavaThreads
1668 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1669 return;
1670 }
1671
1672 if (_count >= _names_len || _count >= _times_len) {
1673 // skip if the result array is not big enough
1674 return;
1675 }
1676
1677 ResourceMark rm; // thread->name() uses ResourceArea
1678
1679 assert(thread->name() != nullptr, "All threads should have a name");
1680 _names_chars[_count] = os::strdup_check_oom(thread->name());
1681 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1682 os::thread_cpu_time(thread) : -1);
1683 _count++;
1684 }
1685
1686 // Called without Threads_lock, we can allocate String objects.
1687 void ThreadTimesClosure::do_unlocked(TRAPS) {
1688
1689 for (int i = 0; i < _count; i++) {
1690 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1691 _names_strings->obj_at_put(i, s());
1692 }
1693 }
1694
1695 ThreadTimesClosure::~ThreadTimesClosure() {
1696 for (int i = 0; i < _count; i++) {
1697 os::free(_names_chars[i]);
1698 }
1699 FREE_C_HEAP_ARRAY(char *, _names_chars);
1700 }
1701
1702 // Fills names with VM internal thread names and times with the corresponding
1703 // CPU times. If names or times is null, a NullPointerException is thrown.
1704 // If the element type of names is not String, an IllegalArgumentException is
1705 // thrown.
1706 // If an array is not large enough to hold all the entries, only the entries
1707 // that fit will be returned. Return value is the number of VM internal
1708 // threads entries.
1709 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1710 jobjectArray names,
1711 jlongArray times))
1712 if (names == nullptr || times == nullptr) {
1713 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1714 }
1715 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1716 objArrayHandle names_ah(THREAD, na);
1717
1718 // Make sure we have a String array
1719 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1720 if (element_klass != vmClasses::String_klass()) {
1721 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1722 "Array element type is not String class", 0);
1723 }
1724
1725 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1726 typeArrayHandle times_ah(THREAD, ta);
1727
1728 ThreadTimesClosure ttc(names_ah, times_ah);
1729 {
1730 MutexLocker ml(THREAD, Threads_lock);
1731 Threads::threads_do(&ttc);
1732 }
1733 ttc.do_unlocked(THREAD);
1734 return ttc.count();
1735 JVM_END
1736
1737 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1738 ResourceMark rm(THREAD);
1739
1740 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1741 VMThread::execute(&op);
1742
1743 DeadlockCycle* deadlocks = op.result();
1744 if (deadlocks == nullptr) {
1745 // no deadlock found and return
1746 return Handle();
1747 }
1748
1749 int num_threads = 0;
1750 DeadlockCycle* cycle;
1751 for (cycle = deadlocks; cycle != nullptr; cycle = cycle->next()) {
1752 num_threads += cycle->num_threads();
1753 }
1754
1755 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NH);
1756 objArrayHandle threads_ah(THREAD, r);
1757
1758 int index = 0;
1759 for (cycle = deadlocks; cycle != nullptr; cycle = cycle->next()) {
1760 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1761 int len = deadlock_threads->length();
1762 for (int i = 0; i < len; i++) {
1763 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1764 index++;
1765 }
1766 }
1767 return threads_ah;
1768 }
1769
1770 // Finds cycles of threads that are deadlocked involved in object monitors
1771 // and JSR-166 synchronizers.
1772 // Returns an array of Thread objects which are in deadlock, if any.
1773 // Otherwise, returns null.
1774 //
1775 // Input parameter:
1776 // object_monitors_only - if true, only check object monitors
1777 //
1778 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1779 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_NULL);
1780 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1781 JVM_END
1782
1783 // Finds cycles of threads that are deadlocked on monitor locks
1784 // Returns an array of Thread objects which are in deadlock, if any.
1785 // Otherwise, returns null.
1786 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1787 Handle result = find_deadlocks(true, CHECK_NULL);
1788 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1789 JVM_END
1790
1791 // Gets the information about GC extension attributes including
1792 // the name of the attribute, its type, and a short description.
1793 //
1794 // Input parameters:
1795 // mgr - GC memory manager
1796 // info - caller allocated array of jmmExtAttributeInfo
1797 // count - number of elements of the info array
1798 //
1799 // Returns the number of GC extension attributes filled in the info array; or
1800 // -1 if info is not big enough
1801 //
1802 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1803 // All GC memory managers have 1 attribute (number of GC threads)
1804 if (count == 0) {
1805 return 0;
1806 }
1807
1808 if (info == nullptr) {
1809 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1810 }
1811
1812 info[0].name = "GcThreadCount";
1813 info[0].type = 'I';
1814 info[0].description = "Number of GC threads";
1815 return 1;
1816 JVM_END
1817
1818 // verify the given array is an array of java/lang/management/MemoryUsage objects
1819 // of a given length and return the objArrayOop
1820 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1821 if (array == nullptr) {
1822 THROW_NULL(vmSymbols::java_lang_NullPointerException());
1823 }
1824
1825 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1826 objArrayHandle array_h(THREAD, oa);
1827
1828 // array must be of the given length
1829 if (length != array_h->length()) {
1830 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1831 "The length of the given MemoryUsage array does not match the number of memory pools.");
1832 }
1833
1834 // check if the element of array is of type MemoryUsage class
1835 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_NULL);
1836 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1837 if (element_klass != usage_klass) {
1838 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1839 "The element type is not MemoryUsage class");
1840 }
1841
1842 return array_h();
1843 }
1844
1845 // Gets the statistics of the last GC of a given GC memory manager.
1846 // Input parameters:
1847 // obj - GarbageCollectorMXBean object
1848 // gc_stat - caller allocated jmmGCStat where:
1849 // a. before_gc_usage - array of MemoryUsage objects
1850 // b. after_gc_usage - array of MemoryUsage objects
1851 // c. gc_ext_attributes_values_size is set to the
1852 // gc_ext_attribute_values array allocated
1853 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1854 //
1855 // On return,
1856 // gc_index == 0 indicates no GC statistics available
1857 //
1858 // before_gc_usage and after_gc_usage - filled with per memory pool
1859 // before and after GC usage in the same order as the memory pools
1860 // returned by GetMemoryPools for a given GC memory manager.
1861 // num_gc_ext_attributes indicates the number of elements in
1862 // the gc_ext_attribute_values array is filled; or
1863 // -1 if the gc_ext_attributes_values array is not big enough
1864 //
1865 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1866 ResourceMark rm(THREAD);
1867
1868 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == nullptr) {
1869 THROW(vmSymbols::java_lang_NullPointerException());
1870 }
1871
1872 // Get the GCMemoryManager
1873 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1874
1875 // Make a copy of the last GC statistics
1876 // GC may occur while constructing the last GC information
1877 int num_pools = MemoryService::num_memory_pools();
1878 GCStatInfo stat(num_pools);
1879 if (mgr->get_last_gc_stat(&stat) == 0) {
1880 gc_stat->gc_index = 0;
1881 return;
1882 }
1883
1884 gc_stat->gc_index = stat.gc_index();
1885 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
1886 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
1887
1888 // Current implementation does not have GC extension attributes
1889 gc_stat->num_gc_ext_attributes = 0;
1890
1891 // Fill the arrays of MemoryUsage objects with before and after GC
1892 // per pool memory usage
1893 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
1894 num_pools,
1895 CHECK);
1896 objArrayHandle usage_before_gc_ah(THREAD, bu);
1897
1898 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
1899 num_pools,
1900 CHECK);
1901 objArrayHandle usage_after_gc_ah(THREAD, au);
1902
1903 for (int i = 0; i < num_pools; i++) {
1904 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
1905 Handle after_usage;
1906
1907 MemoryUsage u = stat.after_gc_usage_for_pool(i);
1908 if (u.max_size() == 0 && u.used() > 0) {
1909 // If max size == 0, this pool is a survivor space.
1910 // Set max size = -1 since the pools will be swapped after GC.
1911 MemoryUsage usage(u.init_size(), u.used(), u.committed(), MemoryUsage::undefined_size());
1912 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
1913 } else {
1914 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
1915 }
1916 usage_before_gc_ah->obj_at_put(i, before_usage());
1917 usage_after_gc_ah->obj_at_put(i, after_usage());
1918 }
1919
1920 if (gc_stat->gc_ext_attribute_values_size > 0) {
1921 // Current implementation only has 1 attribute (number of GC threads)
1922 // The type is 'I'
1923 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
1924 }
1925 JVM_END
1926
1927 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
1928 ResourceMark rm(THREAD);
1929 // Get the GCMemoryManager
1930 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1931 mgr->set_notification_enabled(enabled?true:false);
1932 JVM_END
1933
1934 // Dump heap - Returns 0 if succeeds.
1935 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
1936 #if INCLUDE_SERVICES
1937 ResourceMark rm(THREAD);
1938 oop on = JNIHandles::resolve_external_guard(outputfile);
1939 if (on == nullptr) {
1940 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
1941 "Output file name cannot be null.", -1);
1942 }
1943 Handle onhandle(THREAD, on);
1944 char* name = java_lang_String::as_platform_dependent_str(onhandle, CHECK_(-1));
1945 if (name == nullptr) {
1946 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
1947 "Output file name cannot be null.", -1);
1948 }
1949 HeapDumper dumper(live ? true : false);
1950 if (dumper.dump(name) != 0) {
1951 const char* errmsg = dumper.error_as_C_string();
1952 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
1953 }
1954 return 0;
1955 #else // INCLUDE_SERVICES
1956 return -1;
1957 #endif // INCLUDE_SERVICES
1958 JVM_END
1959
1960 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
1961 ResourceMark rm(THREAD);
1962 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
1963 objArrayOop cmd_array_oop = oopFactory::new_objArray(vmClasses::String_klass(),
1964 dcmd_list->length(), CHECK_NULL);
1965 objArrayHandle cmd_array(THREAD, cmd_array_oop);
1966 for (int i = 0; i < dcmd_list->length(); i++) {
1967 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
1968 cmd_array->obj_at_put(i, cmd_name);
1969 }
1970 return (jobjectArray) JNIHandles::make_local(THREAD, cmd_array());
1971 JVM_END
1972
1973 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
1974 dcmdInfo* infoArray))
1975 if (cmds == nullptr || infoArray == nullptr) {
1976 THROW(vmSymbols::java_lang_NullPointerException());
1977 }
1978
1979 ResourceMark rm(THREAD);
1980
1981 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
1982 objArrayHandle cmds_ah(THREAD, ca);
1983
1984 // Make sure we have a String array
1985 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
1986 if (element_klass != vmClasses::String_klass()) {
1987 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1988 "Array element type is not String class");
1989 }
1990
1991 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
1992
1993 int num_cmds = cmds_ah->length();
1994 for (int i = 0; i < num_cmds; i++) {
1995 oop cmd = cmds_ah->obj_at(i);
1996 if (cmd == nullptr) {
1997 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1998 "Command name cannot be null.");
1999 }
2000 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2001 if (cmd_name == nullptr) {
2002 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2003 "Command name cannot be null.");
2004 }
2005 int pos = info_list->find_if([&](DCmdInfo* info) {
2006 return info->name_equals(cmd_name);
2007 });
2008 if (pos == -1) {
2009 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2010 "Unknown diagnostic command");
2011 }
2012 DCmdInfo* info = info_list->at(pos);
2013 infoArray[i].name = info->name();
2014 infoArray[i].description = info->description();
2015 infoArray[i].impact = info->impact();
2016 infoArray[i].num_arguments = info->num_arguments();
2017 infoArray[i].enabled = info->is_enabled();
2018 }
2019 JVM_END
2020
2021 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2022 jstring command, dcmdArgInfo* infoArray, jint count))
2023 ResourceMark rm(THREAD);
2024 oop cmd = JNIHandles::resolve_external_guard(command);
2025 if (cmd == nullptr) {
2026 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2027 "Command line cannot be null.");
2028 }
2029 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2030 if (cmd_name == nullptr) {
2031 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2032 "Command line content cannot be null.");
2033 }
2034 DCmd* dcmd = nullptr;
2035 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2036 strlen(cmd_name));
2037 if (factory != nullptr) {
2038 dcmd = factory->create_resource_instance(nullptr);
2039 }
2040 if (dcmd == nullptr) {
2041 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2042 "Unknown diagnostic command");
2043 }
2044 DCmdMark mark(dcmd);
2045 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2046 const int num_args = array->length();
2047 if (num_args != count) {
2048 assert(false, "jmm_GetDiagnosticCommandArgumentsInfo count mismatch (%d vs %d)", count, num_args);
2049 THROW_MSG(vmSymbols::java_lang_InternalError(), "jmm_GetDiagnosticCommandArgumentsInfo count mismatch");
2050 }
2051 for (int i = 0; i < num_args; i++) {
2052 infoArray[i].name = array->at(i)->name();
2053 infoArray[i].description = array->at(i)->description();
2054 infoArray[i].type = array->at(i)->type();
2055 infoArray[i].default_string = array->at(i)->default_string();
2056 infoArray[i].mandatory = array->at(i)->is_mandatory();
2057 infoArray[i].option = array->at(i)->is_option();
2058 infoArray[i].multiple = array->at(i)->is_multiple();
2059 infoArray[i].position = array->at(i)->position();
2060 }
2061 return;
2062 JVM_END
2063
2064 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2065 ResourceMark rm(THREAD);
2066 oop cmd = JNIHandles::resolve_external_guard(commandline);
2067 if (cmd == nullptr) {
2068 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2069 "Command line cannot be null.");
2070 }
2071 char* cmdline = java_lang_String::as_utf8_string(cmd);
2072 if (cmdline == nullptr) {
2073 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2074 "Command line content cannot be null.");
2075 }
2076 bufferedStream output;
2077 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2078 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2079 return (jstring) JNIHandles::make_local(THREAD, result);
2080 JVM_END
2081
2082 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2083 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2084 JVM_END
2085
2086 jlong Management::ticks_to_ms(jlong ticks) {
2087 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2088 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2089 * (double)1000.0);
2090 }
2091
2092 jlong Management::ticks_to_us(jlong ticks) {
2093 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2094 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2095 * (double)1000000.0);
2096 }
2097
2098 // Gets the amount of memory allocated on the Java heap since JVM launch.
2099 JVM_ENTRY(jlong, jmm_GetTotalThreadAllocatedMemory(JNIEnv *env))
2100 // A thread increments exited_allocated_bytes in ThreadService::remove_thread
2101 // only after it removes itself from the threads list, and once a TLH is
2102 // created, no thread it references can remove itself from the threads
2103 // list, so none can update exited_allocated_bytes. We therefore initialize
2104 // result with exited_allocated_bytes after after we create the TLH so that
2105 // the final result can only be short due to (1) threads that start after
2106 // the TLH is created, or (2) terminating threads that escape TLH creation
2107 // and don't update exited_allocated_bytes before we initialize result.
2108
2109 // We keep a high water mark to ensure monotonicity in case threads counted
2110 // on a previous call end up in state (2).
2111 static jlong high_water_result = 0;
2112
2113 JavaThreadIteratorWithHandle jtiwh;
2114 jlong result = ThreadService::exited_allocated_bytes();
2115 for (; JavaThread* thread = jtiwh.next();) {
2116 jlong size = thread->cooked_allocated_bytes();
2117 result += size;
2118 }
2119
2120 {
2121 assert(MonitoringSupport_lock != nullptr, "Must be");
2122 MutexLocker ml(MonitoringSupport_lock, Mutex::_no_safepoint_check_flag);
2123 if (result < high_water_result) {
2124 // Encountered (2) above, or result wrapped to a negative value. In
2125 // the latter case, it's pegged at the last positive value.
2126 result = high_water_result;
2127 } else {
2128 high_water_result = result;
2129 }
2130 }
2131 return result;
2132 JVM_END
2133
2134 // Gets the amount of memory allocated on the Java heap for a single thread.
2135 // Returns -1 if the thread does not exist or has terminated.
2136 JVM_ENTRY(jlong, jmm_GetOneThreadAllocatedMemory(JNIEnv *env, jlong thread_id))
2137 if (thread_id < 0) {
2138 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2139 "Invalid thread ID", -1);
2140 }
2141
2142 if (thread_id == 0) { // current thread
2143 return thread->cooked_allocated_bytes();
2144 }
2145
2146 ThreadsListHandle tlh;
2147 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
2148 if (is_platform_thread(java_thread)) {
2149 return java_thread->cooked_allocated_bytes();
2150 }
2151 return -1;
2152 JVM_END
2153
2154 // Gets an array containing the amount of memory allocated on the Java
2155 // heap for a set of threads (in bytes). Each element of the array is
2156 // the amount of memory allocated for the thread ID specified in the
2157 // corresponding entry in the given array of thread IDs; or -1 if the
2158 // thread does not exist or has terminated.
2159 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2160 jlongArray sizeArray))
2161 // Check if threads is null
2162 if (ids == nullptr || sizeArray == nullptr) {
2163 THROW(vmSymbols::java_lang_NullPointerException());
2164 }
2165
2166 ResourceMark rm(THREAD);
2167 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2168 typeArrayHandle ids_ah(THREAD, ta);
2169
2170 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2171 typeArrayHandle sizeArray_h(THREAD, sa);
2172
2173 // validate the thread id array
2174 validate_thread_id_array(ids_ah, CHECK);
2175
2176 // sizeArray must be of the same length as the given array of thread IDs
2177 int num_threads = ids_ah->length();
2178 if (num_threads != sizeArray_h->length()) {
2179 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2180 "The length of the given long array does not match the length of "
2181 "the given array of thread IDs");
2182 }
2183
2184 ThreadsListHandle tlh;
2185 for (int i = 0; i < num_threads; i++) {
2186 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(ids_ah->long_at(i));
2187 if (is_platform_thread(java_thread)) {
2188 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2189 }
2190 }
2191 JVM_END
2192
2193 // Returns the CPU time consumed by a given thread (in nanoseconds).
2194 // If thread_id == 0, CPU time for the current thread is returned.
2195 // If user_sys_cpu_time = true, user level and system CPU time of
2196 // a given thread is returned; otherwise, only user level CPU time
2197 // is returned.
2198 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2199 if (!os::is_thread_cpu_time_supported()) {
2200 return -1;
2201 }
2202
2203 if (thread_id < 0) {
2204 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2205 "Invalid thread ID", -1);
2206 }
2207
2208 JavaThread* java_thread = nullptr;
2209 if (thread_id == 0) {
2210 // current thread
2211 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2212 } else {
2213 ThreadsListHandle tlh;
2214 java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
2215 if (is_platform_thread(java_thread)) {
2216 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2217 }
2218 }
2219 return -1;
2220 JVM_END
2221
2222 // Gets an array containing the CPU times consumed by a set of threads
2223 // (in nanoseconds). Each element of the array is the CPU time for the
2224 // thread ID specified in the corresponding entry in the given array
2225 // of thread IDs; or -1 if the thread does not exist or has terminated.
2226 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2227 // for the given thread is returned; otherwise, only user level CPU time
2228 // is returned.
2229 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2230 jlongArray timeArray,
2231 jboolean user_sys_cpu_time))
2232 // Check if threads is null
2233 if (ids == nullptr || timeArray == nullptr) {
2234 THROW(vmSymbols::java_lang_NullPointerException());
2235 }
2236
2237 ResourceMark rm(THREAD);
2238 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2239 typeArrayHandle ids_ah(THREAD, ta);
2240
2241 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2242 typeArrayHandle timeArray_h(THREAD, tia);
2243
2244 // validate the thread id array
2245 validate_thread_id_array(ids_ah, CHECK);
2246
2247 // timeArray must be of the same length as the given array of thread IDs
2248 int num_threads = ids_ah->length();
2249 if (num_threads != timeArray_h->length()) {
2250 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2251 "The length of the given long array does not match the length of "
2252 "the given array of thread IDs");
2253 }
2254
2255 ThreadsListHandle tlh;
2256 for (int i = 0; i < num_threads; i++) {
2257 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(ids_ah->long_at(i));
2258 if (is_platform_thread(java_thread)) {
2259 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2260 user_sys_cpu_time != 0));
2261 }
2262 }
2263 JVM_END
2264
2265 const struct jmmInterface_1_ jmm_interface = {
2266 nullptr,
2267 nullptr,
2268 jmm_GetVersion,
2269 jmm_GetOptionalSupport,
2270 jmm_GetThreadInfo,
2271 jmm_GetMemoryPools,
2272 jmm_GetMemoryManagers,
2273 jmm_GetMemoryPoolUsage,
2274 jmm_GetPeakMemoryPoolUsage,
2275 jmm_GetTotalThreadAllocatedMemory,
2276 jmm_GetOneThreadAllocatedMemory,
2277 jmm_GetThreadAllocatedMemory,
2278 jmm_GetMemoryUsage,
2279 jmm_GetLongAttribute,
2280 jmm_GetBoolAttribute,
2281 jmm_SetBoolAttribute,
2282 jmm_GetLongAttributes,
2283 jmm_FindMonitorDeadlockedThreads,
2284 jmm_GetThreadCpuTime,
2285 jmm_GetVMGlobalNames,
2286 jmm_GetVMGlobals,
2287 jmm_GetInternalThreadTimes,
2288 jmm_ResetStatistic,
2289 jmm_SetPoolSensor,
2290 jmm_SetPoolThreshold,
2291 jmm_GetPoolCollectionUsage,
2292 jmm_GetGCExtAttributeInfo,
2293 jmm_GetLastGCStat,
2294 jmm_GetThreadCpuTimeWithKind,
2295 jmm_GetThreadCpuTimesWithKind,
2296 jmm_DumpHeap0,
2297 jmm_FindDeadlockedThreads,
2298 jmm_SetVMGlobal,
2299 nullptr,
2300 jmm_DumpThreads,
2301 jmm_SetGCNotificationEnabled,
2302 jmm_GetDiagnosticCommands,
2303 jmm_GetDiagnosticCommandInfo,
2304 jmm_GetDiagnosticCommandArgumentsInfo,
2305 jmm_ExecuteDiagnosticCommand,
2306 jmm_SetDiagnosticFrameworkNotificationEnabled
2307 };
2308 #endif // INCLUDE_MANAGEMENT
2309
2310 void* Management::get_jmm_interface(int version) {
2311 #if INCLUDE_MANAGEMENT
2312 if (version == JMM_VERSION) {
2313 return (void*) &jmm_interface;
2314 }
2315 #endif // INCLUDE_MANAGEMENT
2316 return nullptr;
2317 }