1 /*
2 * Copyright (c) 2003, 2024, 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 Handle(),
164 THREAD);
165 if (k == nullptr) {
166 vm_exit_during_initialization("Management agent initialization failure: "
167 "class jdk.internal.agent.Agent not found.");
168 }
169
170 JavaValue result(T_VOID);
171 JavaCalls::call_static(&result,
172 k,
173 vmSymbols::startAgent_name(),
174 vmSymbols::void_method_signature(),
175 CHECK);
176 }
177 }
178
179 void Management::get_optional_support(jmmOptionalSupport* support) {
180 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
181 }
182
183 InstanceKlass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
184 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
185 return initialize_klass(k, THREAD);
186 }
187
188 InstanceKlass* Management::load_and_initialize_klass_or_null(Symbol* sh, TRAPS) {
189 Klass* k = SystemDictionary::resolve_or_null(sh, CHECK_NULL);
190 if (k == nullptr) {
191 return nullptr;
192 }
193 return initialize_klass(k, THREAD);
194 }
195
196 InstanceKlass* Management::initialize_klass(Klass* k, TRAPS) {
197 InstanceKlass* ik = InstanceKlass::cast(k);
198 if (ik->should_be_initialized()) {
199 ik->initialize(CHECK_NULL);
200 }
201 // If these classes change to not be owned by the boot loader, they need
202 // to be walked to keep their class loader alive in oops_do.
203 assert(ik->class_loader() == nullptr, "need to follow in oops_do");
204 return ik;
205 }
206
207
208 void Management::record_vm_init_completed() {
209 // Initialize the timestamp to get the current time
210 _vm_init_done_time->set_value(os::javaTimeMillis());
211
212 // Update the timestamp to the vm init done time
213 _stamp.update();
214 }
215
216 void Management::record_vm_startup_time(jlong begin, jlong duration) {
217 // if the performance counter is not initialized,
218 // then vm initialization failed; simply return.
219 if (_begin_vm_creation_time == nullptr) return;
220
221 _begin_vm_creation_time->set_value(begin);
222 _end_vm_creation_time->set_value(begin + duration);
223 PerfMemory::set_accessible(true);
224 }
225
226 jlong Management::begin_vm_creation_time() {
227 return _begin_vm_creation_time->get_value();
228 }
229
230 jlong Management::vm_init_done_time() {
231 return _vm_init_done_time->get_value();
232 }
233
234 jlong Management::timestamp() {
235 TimeStamp t;
236 t.update();
237 return t.ticks() - _stamp.ticks();
238 }
239
240 InstanceKlass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
241 if (_threadInfo_klass == nullptr) {
242 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
243 }
244 return _threadInfo_klass;
245 }
246
247 InstanceKlass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
248 if (_memoryUsage_klass == nullptr) {
249 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
250 }
251 return _memoryUsage_klass;
252 }
253
254 InstanceKlass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
255 if (_memoryPoolMXBean_klass == nullptr) {
256 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
257 }
258 return _memoryPoolMXBean_klass;
259 }
260
261 InstanceKlass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
262 if (_memoryManagerMXBean_klass == nullptr) {
263 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
264 }
265 return _memoryManagerMXBean_klass;
266 }
267
268 InstanceKlass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
269 if (_garbageCollectorMXBean_klass == nullptr) {
270 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
271 }
272 return _garbageCollectorMXBean_klass;
273 }
274
275 InstanceKlass* Management::sun_management_Sensor_klass(TRAPS) {
276 if (_sensor_klass == nullptr) {
277 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
278 }
279 return _sensor_klass;
280 }
281
282 InstanceKlass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
283 if (_managementFactoryHelper_klass == nullptr) {
284 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
285 }
286 return _managementFactoryHelper_klass;
287 }
288
289 InstanceKlass* Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS) {
290 if (_garbageCollectorExtImpl_klass == nullptr) {
291 _garbageCollectorExtImpl_klass =
292 load_and_initialize_klass_or_null(vmSymbols::com_sun_management_internal_GarbageCollectorExtImpl(), CHECK_NULL);
293 }
294 return _garbageCollectorExtImpl_klass;
295 }
296
297 InstanceKlass* Management::com_sun_management_GcInfo_klass(TRAPS) {
298 if (_gcInfo_klass == nullptr) {
299 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
300 }
301 return _gcInfo_klass;
302 }
303
304 InstanceKlass* Management::com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS) {
305 if (_diagnosticCommandImpl_klass == nullptr) {
306 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_DiagnosticCommandImpl(), CHECK_NULL);
307 }
308 return _diagnosticCommandImpl_klass;
309 }
310
311 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
312 Handle snapshot_thread(THREAD, snapshot->threadObj());
313
314 jlong contended_time;
315 jlong waited_time;
316 if (ThreadService::is_thread_monitoring_contention()) {
317 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
318 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
319 } else {
320 // set them to -1 if thread contention monitoring is disabled.
321 contended_time = max_julong;
322 waited_time = max_julong;
323 }
324
325 int thread_status = static_cast<int>(snapshot->thread_status());
326 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
327 if (snapshot->is_suspended()) {
328 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
329 }
330 if (snapshot->is_in_native()) {
331 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
332 }
333
334 ThreadStackTrace* st = snapshot->get_stack_trace();
335 Handle stacktrace_h;
336 if (st != nullptr) {
337 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
338 } else {
339 stacktrace_h = Handle();
340 }
341
342 args->push_oop(snapshot_thread);
343 args->push_int(thread_status);
344 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
345 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
346 args->push_long(snapshot->contended_enter_count());
347 args->push_long(contended_time);
348 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
349 args->push_long(waited_time);
350 args->push_oop(stacktrace_h);
351 }
352
353 // Helper function to construct a ThreadInfo object
354 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
355 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
356 JavaCallArguments args(14);
357
358 // initialize the arguments for the ThreadInfo constructor
359 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
360
361 // Call ThreadInfo constructor with no locked monitors and synchronizers
362 Handle element = JavaCalls::construct_new_instance(
363 ik,
364 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
365 &args,
366 CHECK_NULL);
367 return (instanceOop) element();
368 }
369
370 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
371 objArrayHandle monitors_array,
372 typeArrayHandle depths_array,
373 objArrayHandle synchronizers_array,
374 TRAPS) {
375 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
376 JavaCallArguments args(17);
377
378 // initialize the arguments for the ThreadInfo constructor
379 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
380
381 // push the locked monitors and synchronizers in the arguments
382 args.push_oop(monitors_array);
383 args.push_oop(depths_array);
384 args.push_oop(synchronizers_array);
385
386 // Call ThreadInfo constructor with locked monitors and synchronizers
387 Handle element = JavaCalls::construct_new_instance(
388 ik,
389 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
390 &args,
391 CHECK_NULL);
392 return (instanceOop) element();
393 }
394
395
396 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
397 if (mgr == nullptr) {
398 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
399 }
400 oop mgr_obj = JNIHandles::resolve(mgr);
401 instanceHandle h(THREAD, (instanceOop) mgr_obj);
402
403 InstanceKlass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
404 if (!h->is_a(k)) {
405 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
406 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
407 nullptr);
408 }
409
410 MemoryManager* gc = MemoryService::get_memory_manager(h);
411 if (gc == nullptr || !gc->is_gc_memory_manager()) {
412 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
413 "Invalid GC memory manager",
414 nullptr);
415 }
416 return (GCMemoryManager*) gc;
417 }
418
419 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
420 if (obj == nullptr) {
421 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
422 }
423
424 oop pool_obj = JNIHandles::resolve(obj);
425 assert(pool_obj->is_instance(), "Should be an instanceOop");
426 instanceHandle ph(THREAD, (instanceOop) pool_obj);
427
428 return MemoryService::get_memory_pool(ph);
429 }
430
431 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
432 int num_threads = ids_ah->length();
433
434 // Validate input thread IDs
435 int i = 0;
436 for (i = 0; i < num_threads; i++) {
437 jlong tid = ids_ah->long_at(i);
438 if (tid <= 0) {
439 // throw exception if invalid thread id.
440 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
441 "Invalid thread ID entry");
442 }
443 }
444 }
445
446 // Returns true if the JavaThread's Java object is a platform thread
447 static bool is_platform_thread(JavaThread* jt) {
448 if (jt != nullptr) {
449 oop thread_obj = jt->threadObj();
450 return (thread_obj != nullptr) && !thread_obj->is_a(vmClasses::BoundVirtualThread_klass());
451 } else {
452 return false;
453 }
454 }
455
456 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
457 // check if the element of infoArray is of type ThreadInfo class
458 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
459 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
460 if (element_klass != threadinfo_klass) {
461 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
462 "infoArray element type is not ThreadInfo class");
463 }
464 }
465
466 // Returns true if the ThreadSnapshot's Java object is a platform thread
467 static bool is_platform_thread(ThreadSnapshot* ts) {
468 oop thread_obj = ts->threadObj();
469 return (thread_obj != nullptr) && !thread_obj->is_a(vmClasses::BoundVirtualThread_klass());
470 }
471
472 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
473 if (obj == nullptr) {
474 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
475 }
476
477 oop mgr_obj = JNIHandles::resolve(obj);
478 assert(mgr_obj->is_instance(), "Should be an instanceOop");
479 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
480
481 return MemoryService::get_memory_manager(mh);
482 }
483
484 // Returns a version string and sets major and minor version if
485 // the input parameters are non-null.
486 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
487 return JMM_VERSION;
488 JVM_END
489
490 // Gets the list of VM monitoring and management optional supports
491 // Returns 0 if succeeded; otherwise returns non-zero.
492 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
493 if (support == nullptr) {
494 return -1;
495 }
496 Management::get_optional_support(support);
497 return 0;
498 JVM_END
499
500 // Returns an array of java/lang/management/MemoryPoolMXBean object
501 // one for each memory pool if obj == null; otherwise returns
502 // an array of memory pools for a given memory manager if
503 // it is a valid memory manager.
504 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
505 ResourceMark rm(THREAD);
506
507 int num_memory_pools;
508 MemoryManager* mgr = nullptr;
509 if (obj == nullptr) {
510 num_memory_pools = MemoryService::num_memory_pools();
511 } else {
512 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
513 if (mgr == nullptr) {
514 return nullptr;
515 }
516 num_memory_pools = mgr->num_memory_pools();
517 }
518
519 // Allocate the resulting MemoryPoolMXBean[] object
520 InstanceKlass* ik = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
521 objArrayOop r = oopFactory::new_objArray(ik, num_memory_pools, CHECK_NULL);
522 objArrayHandle poolArray(THREAD, r);
523
524 if (mgr == nullptr) {
525 // Get all memory pools
526 for (int i = 0; i < num_memory_pools; i++) {
527 MemoryPool* pool = MemoryService::get_memory_pool(i);
528 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
529 instanceHandle ph(THREAD, p);
530 poolArray->obj_at_put(i, ph());
531 }
532 } else {
533 // Get memory pools managed by a given memory manager
534 for (int i = 0; i < num_memory_pools; i++) {
535 MemoryPool* pool = mgr->get_memory_pool(i);
536 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
537 instanceHandle ph(THREAD, p);
538 poolArray->obj_at_put(i, ph());
539 }
540 }
541 return (jobjectArray) JNIHandles::make_local(THREAD, poolArray());
542 JVM_END
543
544 // Returns an array of java/lang/management/MemoryManagerMXBean object
545 // one for each memory manager if obj == null; otherwise returns
546 // an array of memory managers for a given memory pool if
547 // it is a valid memory pool.
548 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
549 ResourceMark rm(THREAD);
550
551 int num_mgrs;
552 MemoryPool* pool = nullptr;
553 if (obj == nullptr) {
554 num_mgrs = MemoryService::num_memory_managers();
555 } else {
556 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
557 if (pool == nullptr) {
558 return nullptr;
559 }
560 num_mgrs = pool->num_memory_managers();
561 }
562
563 // Allocate the resulting MemoryManagerMXBean[] object
564 InstanceKlass* ik = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
565 objArrayOop r = oopFactory::new_objArray(ik, num_mgrs, CHECK_NULL);
566 objArrayHandle mgrArray(THREAD, r);
567
568 if (pool == nullptr) {
569 // Get all memory managers
570 for (int i = 0; i < num_mgrs; i++) {
571 MemoryManager* mgr = MemoryService::get_memory_manager(i);
572 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
573 instanceHandle ph(THREAD, p);
574 mgrArray->obj_at_put(i, ph());
575 }
576 } else {
577 // Get memory managers for a given memory pool
578 for (int i = 0; i < num_mgrs; i++) {
579 MemoryManager* mgr = pool->get_memory_manager(i);
580 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
581 instanceHandle ph(THREAD, p);
582 mgrArray->obj_at_put(i, ph());
583 }
584 }
585 return (jobjectArray) JNIHandles::make_local(THREAD, mgrArray());
586 JVM_END
587
588
589 // Returns a java/lang/management/MemoryUsage object containing the memory usage
590 // of a given memory pool.
591 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
592 ResourceMark rm(THREAD);
593
594 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
595 if (pool != nullptr) {
596 MemoryUsage usage = pool->get_memory_usage();
597 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
598 return JNIHandles::make_local(THREAD, h());
599 } else {
600 return nullptr;
601 }
602 JVM_END
603
604 // Returns a java/lang/management/MemoryUsage object containing the memory usage
605 // of a given memory pool.
606 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
607 ResourceMark rm(THREAD);
608
609 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
610 if (pool != nullptr) {
611 MemoryUsage usage = pool->get_peak_memory_usage();
612 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
613 return JNIHandles::make_local(THREAD, h());
614 } else {
615 return nullptr;
616 }
617 JVM_END
618
619 // Returns a java/lang/management/MemoryUsage object containing the memory usage
620 // of a given memory pool after most recent GC.
621 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
622 ResourceMark rm(THREAD);
623
624 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
625 if (pool != nullptr && pool->is_collected_pool()) {
626 MemoryUsage usage = pool->get_last_collection_usage();
627 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
628 return JNIHandles::make_local(THREAD, h());
629 } else {
630 return nullptr;
631 }
632 JVM_END
633
634 // Sets the memory pool sensor for a threshold type
635 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
636 if (obj == nullptr || sensorObj == nullptr) {
637 THROW(vmSymbols::java_lang_NullPointerException());
638 }
639
640 InstanceKlass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
641 oop s = JNIHandles::resolve(sensorObj);
642 assert(s->is_instance(), "Sensor should be an instanceOop");
643 instanceHandle sensor_h(THREAD, (instanceOop) s);
644 if (!sensor_h->is_a(sensor_klass)) {
645 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
646 "Sensor is not an instance of sun.management.Sensor class");
647 }
648
649 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
650 assert(mpool != nullptr, "MemoryPool should exist");
651
652 switch (type) {
653 case JMM_USAGE_THRESHOLD_HIGH:
654 case JMM_USAGE_THRESHOLD_LOW:
655 // have only one sensor for threshold high and low
656 mpool->set_usage_sensor_obj(sensor_h);
657 break;
658 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
659 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
660 // have only one sensor for threshold high and low
661 mpool->set_gc_usage_sensor_obj(sensor_h);
662 break;
663 default:
664 assert(false, "Unrecognized type");
665 }
666
667 JVM_END
668
669
670 // Sets the threshold of a given memory pool.
671 // Returns the previous threshold.
672 //
673 // Input parameters:
674 // pool - the MemoryPoolMXBean object
675 // type - threshold type
676 // threshold - the new threshold (must not be negative)
677 //
678 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
679 if (threshold < 0) {
680 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
681 "Invalid threshold value",
682 -1);
683 }
684
685 if ((size_t)threshold > max_uintx) {
686 stringStream st;
687 st.print("Invalid valid threshold value. Threshold value (" JLONG_FORMAT ") > max value of size_t (" UINTX_FORMAT ")", threshold, max_uintx);
688 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
689 }
690
691 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
692 assert(pool != nullptr, "MemoryPool should exist");
693
694 jlong prev = 0;
695 switch (type) {
696 case JMM_USAGE_THRESHOLD_HIGH:
697 if (!pool->usage_threshold()->is_high_threshold_supported()) {
698 return -1;
699 }
700 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
701 break;
702
703 case JMM_USAGE_THRESHOLD_LOW:
704 if (!pool->usage_threshold()->is_low_threshold_supported()) {
705 return -1;
706 }
707 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
708 break;
709
710 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
711 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
712 return -1;
713 }
714 // return and the new threshold is effective for the next GC
715 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
716
717 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
718 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
719 return -1;
720 }
721 // return and the new threshold is effective for the next GC
722 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
723
724 default:
725 assert(false, "Unrecognized type");
726 return -1;
727 }
728
729 // When the threshold is changed, reevaluate if the low memory
730 // detection is enabled.
731 if (prev != threshold) {
732 LowMemoryDetector::recompute_enabled_for_collected_pools();
733 LowMemoryDetector::detect_low_memory(pool);
734 }
735 return prev;
736 JVM_END
737
738 // Returns a java/lang/management/MemoryUsage object representing
739 // the memory usage for the heap or non-heap memory.
740 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
741 ResourceMark rm(THREAD);
742
743 MemoryUsage usage;
744
745 if (heap) {
746 usage = Universe::heap()->memory_usage();
747 } else {
748 // Calculate the memory usage by summing up the pools.
749 size_t total_init = 0;
750 size_t total_used = 0;
751 size_t total_committed = 0;
752 size_t total_max = 0;
753 bool has_undefined_init_size = false;
754 bool has_undefined_max_size = false;
755
756 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
757 MemoryPool* pool = MemoryService::get_memory_pool(i);
758 if (pool->is_non_heap()) {
759 MemoryUsage u = pool->get_memory_usage();
760 total_used += u.used();
761 total_committed += u.committed();
762
763 if (u.init_size() == MemoryUsage::undefined_size()) {
764 has_undefined_init_size = true;
765 }
766 if (!has_undefined_init_size) {
767 total_init += u.init_size();
768 }
769
770 if (u.max_size() == MemoryUsage::undefined_size()) {
771 has_undefined_max_size = true;
772 }
773 if (!has_undefined_max_size) {
774 total_max += u.max_size();
775 }
776 }
777 }
778
779 // if any one of the memory pool has undefined init_size or max_size,
780 // set it to MemoryUsage::undefined_size()
781 if (has_undefined_init_size) {
782 total_init = MemoryUsage::undefined_size();
783 }
784 if (has_undefined_max_size) {
785 total_max = MemoryUsage::undefined_size();
786 }
787
788 usage = MemoryUsage(total_init, total_used, total_committed, total_max);
789 }
790
791 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
792 return JNIHandles::make_local(THREAD, obj());
793 JVM_END
794
795 // Returns the boolean value of a given attribute.
796 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
797 switch (att) {
798 case JMM_VERBOSE_GC:
799 return MemoryService::get_verbose();
800 case JMM_VERBOSE_CLASS:
801 return ClassLoadingService::get_verbose();
802 case JMM_THREAD_CONTENTION_MONITORING:
803 return ThreadService::is_thread_monitoring_contention();
804 case JMM_THREAD_CPU_TIME:
805 return ThreadService::is_thread_cpu_time_enabled();
806 case JMM_THREAD_ALLOCATED_MEMORY:
807 return ThreadService::is_thread_allocated_memory_enabled();
808 default:
809 assert(0, "Unrecognized attribute");
810 return false;
811 }
812 JVM_END
813
814 // Sets the given boolean attribute and returns the previous value.
815 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
816 switch (att) {
817 case JMM_VERBOSE_GC:
818 return MemoryService::set_verbose(flag != 0);
819 case JMM_VERBOSE_CLASS:
820 return ClassLoadingService::set_verbose(flag != 0);
821 case JMM_THREAD_CONTENTION_MONITORING:
822 return ThreadService::set_thread_monitoring_contention(flag != 0);
823 case JMM_THREAD_CPU_TIME:
824 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
825 case JMM_THREAD_ALLOCATED_MEMORY:
826 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
827 default:
828 assert(0, "Unrecognized attribute");
829 return false;
830 }
831 JVM_END
832
833
834 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
835 switch (att) {
836 case JMM_GC_TIME_MS:
837 return mgr->gc_time_ms();
838
839 case JMM_GC_COUNT:
840 return mgr->gc_count();
841
842 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
843 // current implementation only has 1 ext attribute
844 return 1;
845
846 default:
847 assert(0, "Unrecognized GC attribute");
848 return -1;
849 }
850 }
851
852 class VmThreadCountClosure: public ThreadClosure {
853 private:
854 int _count;
855 public:
856 VmThreadCountClosure() : _count(0) {};
857 void do_thread(Thread* thread);
858 int count() { return _count; }
859 };
860
861 void VmThreadCountClosure::do_thread(Thread* thread) {
862 // exclude externally visible JavaThreads
863 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
864 return;
865 }
866
867 _count++;
868 }
869
870 static jint get_vm_thread_count() {
871 VmThreadCountClosure vmtcc;
872 {
873 MutexLocker ml(Threads_lock);
874 Threads::threads_do(&vmtcc);
875 }
876
877 return vmtcc.count();
878 }
879
880 static jint get_num_flags() {
881 // last flag entry is always null, so subtract 1
882 int nFlags = (int) JVMFlag::numFlags - 1;
883 int count = 0;
884 for (int i = 0; i < nFlags; i++) {
885 JVMFlag* flag = &JVMFlag::flags[i];
886 // Exclude the locked (diagnostic, experimental) flags
887 if (flag->is_unlocked() || flag->is_unlocker()) {
888 count++;
889 }
890 }
891 return count;
892 }
893
894 static jlong get_long_attribute(jmmLongAttribute att) {
895 switch (att) {
896 case JMM_CLASS_LOADED_COUNT:
897 return ClassLoadingService::loaded_class_count();
898
899 case JMM_CLASS_UNLOADED_COUNT:
900 return ClassLoadingService::unloaded_class_count();
901
902 case JMM_THREAD_TOTAL_COUNT:
903 return ThreadService::get_total_thread_count();
904
905 case JMM_THREAD_LIVE_COUNT:
906 return ThreadService::get_live_thread_count();
907
908 case JMM_THREAD_PEAK_COUNT:
909 return ThreadService::get_peak_thread_count();
910
911 case JMM_THREAD_DAEMON_COUNT:
912 return ThreadService::get_daemon_thread_count();
913
914 case JMM_JVM_INIT_DONE_TIME_MS:
915 return Management::vm_init_done_time();
916
917 case JMM_JVM_UPTIME_MS:
918 return Management::ticks_to_ms(os::elapsed_counter());
919
920 case JMM_COMPILE_TOTAL_TIME_MS:
921 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
922
923 case JMM_OS_PROCESS_ID:
924 return os::current_process_id();
925
926 // Hotspot-specific counters
927 case JMM_CLASS_LOADED_BYTES:
928 return ClassLoadingService::loaded_class_bytes();
929
930 case JMM_CLASS_UNLOADED_BYTES:
931 return ClassLoadingService::unloaded_class_bytes();
932
933 case JMM_SHARED_CLASS_LOADED_COUNT:
934 return ClassLoadingService::loaded_shared_class_count();
935
936 case JMM_SHARED_CLASS_UNLOADED_COUNT:
937 return ClassLoadingService::unloaded_shared_class_count();
938
939
940 case JMM_SHARED_CLASS_LOADED_BYTES:
941 return ClassLoadingService::loaded_shared_class_bytes();
942
943 case JMM_SHARED_CLASS_UNLOADED_BYTES:
944 return ClassLoadingService::unloaded_shared_class_bytes();
945
946 case JMM_TOTAL_CLASSLOAD_TIME_MS:
947 return ClassLoader::classloader_time_ms();
948
949 case JMM_VM_GLOBAL_COUNT:
950 return get_num_flags();
951
952 case JMM_SAFEPOINT_COUNT:
953 return RuntimeService::safepoint_count();
954
955 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
956 return RuntimeService::safepoint_sync_time_ms();
957
958 case JMM_TOTAL_STOPPED_TIME_MS:
959 return RuntimeService::safepoint_time_ms();
960
961 case JMM_TOTAL_APP_TIME_MS:
962 return RuntimeService::application_time_ms();
963
964 case JMM_VM_THREAD_COUNT:
965 return get_vm_thread_count();
966
967 case JMM_CLASS_INIT_TOTAL_COUNT:
968 return ClassLoader::class_init_count();
969
970 case JMM_CLASS_INIT_TOTAL_TIME_MS:
971 return ClassLoader::class_init_time_ms();
972
973 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
974 return ClassLoader::class_verify_time_ms();
975
976 case JMM_METHOD_DATA_SIZE_BYTES:
977 return ClassLoadingService::class_method_data_size();
978
979 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
980 return os::physical_memory();
981
982 default:
983 return -1;
984 }
985 }
986
987
988 // Returns the long value of a given attribute.
989 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
990 if (obj == nullptr) {
991 return get_long_attribute(att);
992 } else {
993 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
994 if (mgr != nullptr) {
995 return get_gc_attribute(mgr, att);
996 }
997 }
998 return -1;
999 JVM_END
1000
1001 // Gets the value of all attributes specified in the given array
1002 // and sets the value in the result array.
1003 // Returns the number of attributes found.
1004 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1005 jobject obj,
1006 jmmLongAttribute* atts,
1007 jint count,
1008 jlong* result))
1009
1010 int num_atts = 0;
1011 if (obj == nullptr) {
1012 for (int i = 0; i < count; i++) {
1013 result[i] = get_long_attribute(atts[i]);
1014 if (result[i] != -1) {
1015 num_atts++;
1016 }
1017 }
1018 } else {
1019 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1020 for (int i = 0; i < count; i++) {
1021 result[i] = get_gc_attribute(mgr, atts[i]);
1022 if (result[i] != -1) {
1023 num_atts++;
1024 }
1025 }
1026 }
1027 return num_atts;
1028 JVM_END
1029
1030 // Helper function to do thread dump for a specific list of threads
1031 static void do_thread_dump(ThreadDumpResult* dump_result,
1032 typeArrayHandle ids_ah, // array of thread ID (long[])
1033 int num_threads,
1034 int max_depth,
1035 bool with_locked_monitors,
1036 bool with_locked_synchronizers,
1037 TRAPS) {
1038 // no need to actually perform thread dump if no TIDs are specified
1039 if (num_threads == 0) return;
1040
1041 // First get an array of threadObj handles.
1042 // A JavaThread may terminate before we get the stack trace.
1043 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1044
1045 {
1046 // Need this ThreadsListHandle for converting Java thread IDs into
1047 // threadObj handles; dump_result->set_t_list() is called in the
1048 // VM op below so we can't use it yet.
1049 ThreadsListHandle tlh;
1050 for (int i = 0; i < num_threads; i++) {
1051 jlong tid = ids_ah->long_at(i);
1052 JavaThread* jt = tlh.list()->find_JavaThread_from_java_tid(tid);
1053 oop thread_obj = is_platform_thread(jt) ? jt->threadObj() : (oop)nullptr;
1054 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1055 thread_handle_array->append(threadObj_h);
1056 }
1057 }
1058
1059 // Obtain thread dumps and thread snapshot information
1060 VM_ThreadDump op(dump_result,
1061 thread_handle_array,
1062 num_threads,
1063 max_depth, /* stack depth */
1064 with_locked_monitors,
1065 with_locked_synchronizers);
1066 VMThread::execute(&op);
1067 }
1068
1069 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1070 // for the thread ID specified in the corresponding entry in
1071 // the given array of thread IDs; or null if the thread does not exist
1072 // or has terminated.
1073 //
1074 // Input parameters:
1075 // ids - array of thread IDs
1076 // maxDepth - the maximum depth of stack traces to be dumped:
1077 // maxDepth == -1 requests to dump entire stack trace.
1078 // maxDepth == 0 requests no stack trace.
1079 // infoArray - array of ThreadInfo objects
1080 //
1081 // QQQ - Why does this method return a value instead of void?
1082 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1083 // Check if threads is null
1084 if (ids == nullptr || infoArray == nullptr) {
1085 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1086 }
1087
1088 if (maxDepth < -1) {
1089 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1090 "Invalid maxDepth", -1);
1091 }
1092
1093 ResourceMark rm(THREAD);
1094 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1095 typeArrayHandle ids_ah(THREAD, ta);
1096
1097 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1098 objArrayOop oa = objArrayOop(infoArray_obj);
1099 objArrayHandle infoArray_h(THREAD, oa);
1100
1101 // validate the thread id array
1102 validate_thread_id_array(ids_ah, CHECK_0);
1103
1104 // validate the ThreadInfo[] parameters
1105 validate_thread_info_array(infoArray_h, CHECK_0);
1106
1107 // infoArray must be of the same length as the given array of thread IDs
1108 int num_threads = ids_ah->length();
1109 if (num_threads != infoArray_h->length()) {
1110 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1111 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1112 }
1113
1114 // Must use ThreadDumpResult to store the ThreadSnapshot.
1115 // GC may occur after the thread snapshots are taken but before
1116 // this function returns. The threadObj and other oops kept
1117 // in the ThreadSnapshot are marked and adjusted during GC.
1118 ThreadDumpResult dump_result(num_threads);
1119
1120 if (maxDepth == 0) {
1121 // No stack trace to dump so we do not need to stop the world.
1122 // Since we never do the VM op here we must set the threads list.
1123 dump_result.set_t_list();
1124 for (int i = 0; i < num_threads; i++) {
1125 jlong tid = ids_ah->long_at(i);
1126 JavaThread* jt = dump_result.t_list()->find_JavaThread_from_java_tid(tid);
1127 if (jt == nullptr) {
1128 // if the thread does not exist or now it is terminated,
1129 // create dummy snapshot
1130 dump_result.add_thread_snapshot();
1131 } else {
1132 dump_result.add_thread_snapshot(jt);
1133 }
1134 }
1135 } else {
1136 // obtain thread dump with the specific list of threads with stack trace
1137 do_thread_dump(&dump_result,
1138 ids_ah,
1139 num_threads,
1140 maxDepth,
1141 false, /* no locked monitor */
1142 false, /* no locked synchronizers */
1143 CHECK_0);
1144 }
1145
1146 int num_snapshots = dump_result.num_snapshots();
1147 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1148 assert(num_snapshots == 0 || dump_result.t_list_has_been_set(), "ThreadsList must have been set if we have a snapshot");
1149 int index = 0;
1150 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != nullptr; index++, ts = ts->next()) {
1151 // For each thread, create an java/lang/management/ThreadInfo object
1152 // and fill with the thread information
1153
1154 if (!is_platform_thread(ts)) {
1155 // if the thread does not exist, has terminated, or is a virtual thread, then set threadinfo to null
1156 infoArray_h->obj_at_put(index, nullptr);
1157 continue;
1158 }
1159
1160 // Create java.lang.management.ThreadInfo object
1161 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1162 infoArray_h->obj_at_put(index, info_obj);
1163 }
1164 return 0;
1165 JVM_END
1166
1167 // Dump thread info for the specified threads.
1168 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1169 // for the thread ID specified in the corresponding entry in
1170 // the given array of thread IDs; or null if the thread does not exist
1171 // or has terminated.
1172 //
1173 // Input parameter:
1174 // ids - array of thread IDs; null indicates all live threads
1175 // locked_monitors - if true, dump locked object monitors
1176 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1177 //
1178 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors,
1179 jboolean locked_synchronizers, jint maxDepth))
1180 ResourceMark rm(THREAD);
1181
1182 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1183 int num_threads = (ta != nullptr ? ta->length() : 0);
1184 typeArrayHandle ids_ah(THREAD, ta);
1185
1186 ThreadDumpResult dump_result(num_threads); // can safepoint
1187
1188 if (ids_ah() != nullptr) {
1189
1190 // validate the thread id array
1191 validate_thread_id_array(ids_ah, CHECK_NULL);
1192
1193 // obtain thread dump of a specific list of threads
1194 do_thread_dump(&dump_result,
1195 ids_ah,
1196 num_threads,
1197 maxDepth, /* stack depth */
1198 (locked_monitors ? true : false), /* with locked monitors */
1199 (locked_synchronizers ? true : false), /* with locked synchronizers */
1200 CHECK_NULL);
1201 } else {
1202 // obtain thread dump of all threads
1203 VM_ThreadDump op(&dump_result,
1204 maxDepth, /* stack depth */
1205 (locked_monitors ? true : false), /* with locked monitors */
1206 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1207 VMThread::execute(&op);
1208 }
1209
1210 int num_snapshots = dump_result.num_snapshots();
1211 assert(num_snapshots == 0 || dump_result.t_list_has_been_set(), "ThreadsList must have been set if we have a snapshot");
1212
1213 // create the result ThreadInfo[] object
1214 InstanceKlass* ik = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1215 objArrayOop r = oopFactory::new_objArray(ik, num_snapshots, CHECK_NULL);
1216 objArrayHandle result_h(THREAD, r);
1217
1218 int index = 0;
1219 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != nullptr; ts = ts->next(), index++) {
1220 if (!is_platform_thread(ts)) {
1221 // if the thread does not exist, has terminated, or is a virtual thread, then set threadinfo to null
1222 result_h->obj_at_put(index, nullptr);
1223 continue;
1224 }
1225
1226 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1227 assert(stacktrace != nullptr, "Must have a stack trace dumped");
1228
1229 // Create Object[] filled with locked monitors
1230 // Create int[] filled with the stack depth where a monitor was locked
1231 int num_frames = stacktrace->get_stack_depth();
1232 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1233
1234 // Count the total number of locked monitors
1235 for (int i = 0; i < num_frames; i++) {
1236 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1237 num_locked_monitors += frame->num_locked_monitors();
1238 }
1239
1240 objArrayHandle monitors_array;
1241 typeArrayHandle depths_array;
1242 objArrayHandle synchronizers_array;
1243
1244 if (locked_monitors) {
1245 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1246 // where the thread locked it
1247 objArrayOop array = oopFactory::new_objArray(vmClasses::Object_klass(), num_locked_monitors, CHECK_NULL);
1248 objArrayHandle mh(THREAD, array);
1249 monitors_array = mh;
1250
1251 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1252 typeArrayHandle dh(THREAD, tarray);
1253 depths_array = dh;
1254
1255 int count = 0;
1256 int j = 0;
1257 for (int depth = 0; depth < num_frames; depth++) {
1258 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1259 int len = frame->num_locked_monitors();
1260 GrowableArray<OopHandle>* locked_monitors = frame->locked_monitors();
1261 for (j = 0; j < len; j++) {
1262 oop monitor = locked_monitors->at(j).resolve();
1263 assert(monitor != nullptr, "must be a Java object");
1264 monitors_array->obj_at_put(count, monitor);
1265 depths_array->int_at_put(count, depth);
1266 count++;
1267 }
1268 }
1269
1270 GrowableArray<OopHandle>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1271 for (j = 0; j < jni_locked_monitors->length(); j++) {
1272 oop object = jni_locked_monitors->at(j).resolve();
1273 assert(object != nullptr, "must be a Java object");
1274 monitors_array->obj_at_put(count, object);
1275 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1276 depths_array->int_at_put(count, -1);
1277 count++;
1278 }
1279 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1280 }
1281
1282 if (locked_synchronizers) {
1283 // Create Object[] filled with locked JSR-166 synchronizers
1284 assert(ts->threadObj() != nullptr, "Must be a valid JavaThread");
1285 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1286 GrowableArray<OopHandle>* locks = (tcl != nullptr ? tcl->owned_locks() : nullptr);
1287 int num_locked_synchronizers = (locks != nullptr ? locks->length() : 0);
1288
1289 objArrayOop array = oopFactory::new_objArray(vmClasses::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1290 objArrayHandle sh(THREAD, array);
1291 synchronizers_array = sh;
1292
1293 for (int k = 0; k < num_locked_synchronizers; k++) {
1294 synchronizers_array->obj_at_put(k, locks->at(k).resolve());
1295 }
1296 }
1297
1298 // Create java.lang.management.ThreadInfo object
1299 instanceOop info_obj = Management::create_thread_info_instance(ts,
1300 monitors_array,
1301 depths_array,
1302 synchronizers_array,
1303 CHECK_NULL);
1304 result_h->obj_at_put(index, info_obj);
1305 }
1306
1307 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
1308 JVM_END
1309
1310 // Reset statistic. Return true if the requested statistic is reset.
1311 // Otherwise, return false.
1312 //
1313 // Input parameters:
1314 // obj - specify which instance the statistic associated with to be reset
1315 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1316 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1317 // type - the type of statistic to be reset
1318 //
1319 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1320 ResourceMark rm(THREAD);
1321
1322 switch (type) {
1323 case JMM_STAT_PEAK_THREAD_COUNT:
1324 ThreadService::reset_peak_thread_count();
1325 return true;
1326
1327 case JMM_STAT_THREAD_CONTENTION_COUNT:
1328 case JMM_STAT_THREAD_CONTENTION_TIME: {
1329 jlong tid = obj.j;
1330 if (tid < 0) {
1331 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1332 }
1333
1334 // Look for the JavaThread of this given tid
1335 JavaThreadIteratorWithHandle jtiwh;
1336 if (tid == 0) {
1337 // reset contention statistics for all threads if tid == 0
1338 for (; JavaThread *java_thread = jtiwh.next(); ) {
1339 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1340 ThreadService::reset_contention_count_stat(java_thread);
1341 } else {
1342 ThreadService::reset_contention_time_stat(java_thread);
1343 }
1344 }
1345 } else {
1346 // reset contention statistics for a given thread
1347 JavaThread* java_thread = jtiwh.list()->find_JavaThread_from_java_tid(tid);
1348 if (java_thread == nullptr) {
1349 return false;
1350 }
1351
1352 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1353 ThreadService::reset_contention_count_stat(java_thread);
1354 } else {
1355 ThreadService::reset_contention_time_stat(java_thread);
1356 }
1357 }
1358 return true;
1359 break;
1360 }
1361 case JMM_STAT_PEAK_POOL_USAGE: {
1362 jobject o = obj.l;
1363 if (o == nullptr) {
1364 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1365 }
1366
1367 oop pool_obj = JNIHandles::resolve(o);
1368 assert(pool_obj->is_instance(), "Should be an instanceOop");
1369 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1370
1371 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1372 if (pool != nullptr) {
1373 pool->reset_peak_memory_usage();
1374 return true;
1375 }
1376 break;
1377 }
1378 case JMM_STAT_GC_STAT: {
1379 jobject o = obj.l;
1380 if (o == nullptr) {
1381 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1382 }
1383
1384 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_false);
1385 if (mgr != nullptr) {
1386 mgr->reset_gc_stat();
1387 return true;
1388 }
1389 break;
1390 }
1391 default:
1392 assert(0, "Unknown Statistic Type");
1393 }
1394 return false;
1395 JVM_END
1396
1397 // Returns the fast estimate of CPU time consumed by
1398 // a given thread (in nanoseconds).
1399 // If thread_id == 0, return CPU time for the current thread.
1400 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1401 if (!os::is_thread_cpu_time_supported()) {
1402 return -1;
1403 }
1404
1405 if (thread_id < 0) {
1406 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1407 "Invalid thread ID", -1);
1408 }
1409
1410 JavaThread* java_thread = nullptr;
1411 if (thread_id == 0) {
1412 // current thread
1413 return os::current_thread_cpu_time();
1414 } else {
1415 ThreadsListHandle tlh;
1416 java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
1417 if (is_platform_thread(java_thread)) {
1418 return os::thread_cpu_time((Thread*) java_thread);
1419 }
1420 }
1421 return -1;
1422 JVM_END
1423
1424 // Returns a String array of all VM global flag names
1425 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1426 // last flag entry is always null, so subtract 1
1427 int nFlags = (int) JVMFlag::numFlags - 1;
1428 // allocate a temp array
1429 objArrayOop r = oopFactory::new_objArray(vmClasses::String_klass(),
1430 nFlags, CHECK_NULL);
1431 objArrayHandle flags_ah(THREAD, r);
1432 int num_entries = 0;
1433 for (int i = 0; i < nFlags; i++) {
1434 JVMFlag* flag = &JVMFlag::flags[i];
1435 // Exclude develop flags in product builds.
1436 if (flag->is_constant_in_binary()) {
1437 continue;
1438 }
1439 // Exclude the locked (experimental, diagnostic) flags
1440 if (flag->is_unlocked() || flag->is_unlocker()) {
1441 Handle s = java_lang_String::create_from_str(flag->name(), CHECK_NULL);
1442 flags_ah->obj_at_put(num_entries, s());
1443 num_entries++;
1444 }
1445 }
1446
1447 if (num_entries < nFlags) {
1448 // Return array of right length
1449 objArrayOop res = oopFactory::new_objArray(vmClasses::String_klass(), num_entries, CHECK_NULL);
1450 for(int i = 0; i < num_entries; i++) {
1451 res->obj_at_put(i, flags_ah->obj_at(i));
1452 }
1453 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1454 }
1455
1456 return (jobjectArray)JNIHandles::make_local(THREAD, flags_ah());
1457 JVM_END
1458
1459 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1460 // can't be determined, true otherwise. If false is returned, then *global
1461 // will be incomplete and invalid.
1462 static bool add_global_entry(Handle name, jmmVMGlobal *global, JVMFlag *flag, TRAPS) {
1463 Handle flag_name;
1464 if (name() == nullptr) {
1465 flag_name = java_lang_String::create_from_str(flag->name(), CHECK_false);
1466 } else {
1467 flag_name = name;
1468 }
1469 global->name = (jstring)JNIHandles::make_local(THREAD, flag_name());
1470
1471 if (flag->is_bool()) {
1472 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1473 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1474 } else if (flag->is_int()) {
1475 global->value.j = (jlong)flag->get_int();
1476 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1477 } else if (flag->is_uint()) {
1478 global->value.j = (jlong)flag->get_uint();
1479 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1480 } else if (flag->is_intx()) {
1481 global->value.j = (jlong)flag->get_intx();
1482 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1483 } else if (flag->is_uintx()) {
1484 global->value.j = (jlong)flag->get_uintx();
1485 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1486 } else if (flag->is_uint64_t()) {
1487 global->value.j = (jlong)flag->get_uint64_t();
1488 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1489 } else if (flag->is_double()) {
1490 global->value.d = (jdouble)flag->get_double();
1491 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE;
1492 } else if (flag->is_size_t()) {
1493 global->value.j = (jlong)flag->get_size_t();
1494 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1495 } else if (flag->is_ccstr()) {
1496 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1497 global->value.l = (jobject)JNIHandles::make_local(THREAD, str());
1498 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1499 } else {
1500 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1501 return false;
1502 }
1503
1504 global->writeable = flag->is_writeable();
1505 global->external = flag->is_external();
1506 switch (flag->get_origin()) {
1507 case JVMFlagOrigin::DEFAULT:
1508 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1509 break;
1510 case JVMFlagOrigin::COMMAND_LINE:
1511 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1512 break;
1513 case JVMFlagOrigin::ENVIRON_VAR:
1514 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1515 break;
1516 case JVMFlagOrigin::CONFIG_FILE:
1517 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1518 break;
1519 case JVMFlagOrigin::MANAGEMENT:
1520 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1521 break;
1522 case JVMFlagOrigin::ERGONOMIC:
1523 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1524 break;
1525 case JVMFlagOrigin::ATTACH_ON_DEMAND:
1526 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND;
1527 break;
1528 default:
1529 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1530 }
1531
1532 return true;
1533 }
1534
1535 // Fill globals array of count length with jmmVMGlobal entries
1536 // specified by names. If names == null, fill globals array
1537 // with all Flags. Return value is number of entries
1538 // created in globals.
1539 // If a JVMFlag with a given name in an array element does not
1540 // exist, globals[i].name will be set to null.
1541 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1542 jobjectArray names,
1543 jmmVMGlobal *globals,
1544 jint count))
1545
1546
1547 if (globals == nullptr) {
1548 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1549 }
1550
1551 ResourceMark rm(THREAD);
1552
1553 if (names != nullptr) {
1554 // return the requested globals
1555 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1556 objArrayHandle names_ah(THREAD, ta);
1557 // Make sure we have a String array
1558 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1559 if (element_klass != vmClasses::String_klass()) {
1560 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1561 "Array element type is not String class", 0);
1562 }
1563
1564 int names_length = names_ah->length();
1565 int num_entries = 0;
1566 for (int i = 0; i < names_length && i < count; i++) {
1567 oop s = names_ah->obj_at(i);
1568 if (s == nullptr) {
1569 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1570 }
1571
1572 Handle sh(THREAD, s);
1573 char* str = java_lang_String::as_utf8_string(s);
1574 JVMFlag* flag = JVMFlag::find_flag(str);
1575 if (flag != nullptr &&
1576 add_global_entry(sh, &globals[i], flag, THREAD)) {
1577 num_entries++;
1578 } else {
1579 globals[i].name = nullptr;
1580 }
1581 }
1582 return num_entries;
1583 } else {
1584 // return all globals if names == null
1585
1586 // last flag entry is always null, so subtract 1
1587 int nFlags = (int) JVMFlag::numFlags - 1;
1588 Handle null_h;
1589 int num_entries = 0;
1590 for (int i = 0; i < nFlags && num_entries < count; i++) {
1591 JVMFlag* flag = &JVMFlag::flags[i];
1592 // Exclude develop flags in product builds.
1593 if (flag->is_constant_in_binary()) {
1594 continue;
1595 }
1596 // Exclude the locked (diagnostic, experimental) flags
1597 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1598 add_global_entry(null_h, &globals[num_entries], flag, THREAD)) {
1599 num_entries++;
1600 }
1601 }
1602 return num_entries;
1603 }
1604 JVM_END
1605
1606 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1607 ResourceMark rm(THREAD);
1608
1609 oop fn = JNIHandles::resolve_external_guard(flag_name);
1610 if (fn == nullptr) {
1611 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1612 "The flag name cannot be null.");
1613 }
1614 char* name = java_lang_String::as_utf8_string(fn);
1615
1616 FormatBuffer<80> error_msg("%s", "");
1617 int succeed = WriteableFlags::set_flag(name, new_value, JVMFlagOrigin::MANAGEMENT, error_msg);
1618
1619 if (succeed != JVMFlag::SUCCESS) {
1620 if (succeed == JVMFlag::MISSING_VALUE) {
1621 // missing value causes NPE to be thrown
1622 THROW(vmSymbols::java_lang_NullPointerException());
1623 } else {
1624 // all the other errors are reported as IAE with the appropriate error message
1625 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1626 error_msg.buffer());
1627 }
1628 }
1629 assert(succeed == JVMFlag::SUCCESS, "Setting flag should succeed");
1630 JVM_END
1631
1632 class ThreadTimesClosure: public ThreadClosure {
1633 private:
1634 objArrayHandle _names_strings;
1635 char **_names_chars;
1636 typeArrayHandle _times;
1637 int _names_len;
1638 int _times_len;
1639 int _count;
1640
1641 public:
1642 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1643 ~ThreadTimesClosure();
1644 virtual void do_thread(Thread* thread);
1645 void do_unlocked(TRAPS);
1646 int count() { return _count; }
1647 };
1648
1649 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1650 typeArrayHandle times) {
1651 assert(names() != nullptr, "names was null");
1652 assert(times() != nullptr, "times was null");
1653 _names_strings = names;
1654 _names_len = names->length();
1655 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1656 _times = times;
1657 _times_len = times->length();
1658 _count = 0;
1659 }
1660
1661 //
1662 // Called with Threads_lock held
1663 //
1664 void ThreadTimesClosure::do_thread(Thread* thread) {
1665 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
1666 assert(thread != nullptr, "thread was null");
1667
1668 // exclude externally visible JavaThreads
1669 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1670 return;
1671 }
1672
1673 if (_count >= _names_len || _count >= _times_len) {
1674 // skip if the result array is not big enough
1675 return;
1676 }
1677
1678 ResourceMark rm; // thread->name() uses ResourceArea
1679
1680 assert(thread->name() != nullptr, "All threads should have a name");
1681 _names_chars[_count] = os::strdup_check_oom(thread->name());
1682 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1683 os::thread_cpu_time(thread) : -1);
1684 _count++;
1685 }
1686
1687 // Called without Threads_lock, we can allocate String objects.
1688 void ThreadTimesClosure::do_unlocked(TRAPS) {
1689
1690 for (int i = 0; i < _count; i++) {
1691 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1692 _names_strings->obj_at_put(i, s());
1693 }
1694 }
1695
1696 ThreadTimesClosure::~ThreadTimesClosure() {
1697 for (int i = 0; i < _count; i++) {
1698 os::free(_names_chars[i]);
1699 }
1700 FREE_C_HEAP_ARRAY(char *, _names_chars);
1701 }
1702
1703 // Fills names with VM internal thread names and times with the corresponding
1704 // CPU times. If names or times is null, a NullPointerException is thrown.
1705 // If the element type of names is not String, an IllegalArgumentException is
1706 // thrown.
1707 // If an array is not large enough to hold all the entries, only the entries
1708 // that fit will be returned. Return value is the number of VM internal
1709 // threads entries.
1710 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1711 jobjectArray names,
1712 jlongArray times))
1713 if (names == nullptr || times == nullptr) {
1714 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1715 }
1716 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1717 objArrayHandle names_ah(THREAD, na);
1718
1719 // Make sure we have a String array
1720 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1721 if (element_klass != vmClasses::String_klass()) {
1722 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1723 "Array element type is not String class", 0);
1724 }
1725
1726 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1727 typeArrayHandle times_ah(THREAD, ta);
1728
1729 ThreadTimesClosure ttc(names_ah, times_ah);
1730 {
1731 MutexLocker ml(THREAD, Threads_lock);
1732 Threads::threads_do(&ttc);
1733 }
1734 ttc.do_unlocked(THREAD);
1735 return ttc.count();
1736 JVM_END
1737
1738 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1739 ResourceMark rm(THREAD);
1740
1741 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1742 VMThread::execute(&op);
1743
1744 DeadlockCycle* deadlocks = op.result();
1745 if (deadlocks == nullptr) {
1746 // no deadlock found and return
1747 return Handle();
1748 }
1749
1750 int num_threads = 0;
1751 DeadlockCycle* cycle;
1752 for (cycle = deadlocks; cycle != nullptr; cycle = cycle->next()) {
1753 num_threads += cycle->num_threads();
1754 }
1755
1756 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NH);
1757 objArrayHandle threads_ah(THREAD, r);
1758
1759 int index = 0;
1760 for (cycle = deadlocks; cycle != nullptr; cycle = cycle->next()) {
1761 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1762 int len = deadlock_threads->length();
1763 for (int i = 0; i < len; i++) {
1764 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1765 index++;
1766 }
1767 }
1768 return threads_ah;
1769 }
1770
1771 // Finds cycles of threads that are deadlocked involved in object monitors
1772 // and JSR-166 synchronizers.
1773 // Returns an array of Thread objects which are in deadlock, if any.
1774 // Otherwise, returns null.
1775 //
1776 // Input parameter:
1777 // object_monitors_only - if true, only check object monitors
1778 //
1779 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1780 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_NULL);
1781 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1782 JVM_END
1783
1784 // Finds cycles of threads that are deadlocked on monitor locks
1785 // Returns an array of Thread objects which are in deadlock, if any.
1786 // Otherwise, returns null.
1787 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1788 Handle result = find_deadlocks(true, CHECK_NULL);
1789 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1790 JVM_END
1791
1792 // Gets the information about GC extension attributes including
1793 // the name of the attribute, its type, and a short description.
1794 //
1795 // Input parameters:
1796 // mgr - GC memory manager
1797 // info - caller allocated array of jmmExtAttributeInfo
1798 // count - number of elements of the info array
1799 //
1800 // Returns the number of GC extension attributes filled in the info array; or
1801 // -1 if info is not big enough
1802 //
1803 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1804 // All GC memory managers have 1 attribute (number of GC threads)
1805 if (count == 0) {
1806 return 0;
1807 }
1808
1809 if (info == nullptr) {
1810 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1811 }
1812
1813 info[0].name = "GcThreadCount";
1814 info[0].type = 'I';
1815 info[0].description = "Number of GC threads";
1816 return 1;
1817 JVM_END
1818
1819 // verify the given array is an array of java/lang/management/MemoryUsage objects
1820 // of a given length and return the objArrayOop
1821 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1822 if (array == nullptr) {
1823 THROW_NULL(vmSymbols::java_lang_NullPointerException());
1824 }
1825
1826 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1827 objArrayHandle array_h(THREAD, oa);
1828
1829 // array must be of the given length
1830 if (length != array_h->length()) {
1831 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1832 "The length of the given MemoryUsage array does not match the number of memory pools.");
1833 }
1834
1835 // check if the element of array is of type MemoryUsage class
1836 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_NULL);
1837 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1838 if (element_klass != usage_klass) {
1839 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1840 "The element type is not MemoryUsage class");
1841 }
1842
1843 return array_h();
1844 }
1845
1846 // Gets the statistics of the last GC of a given GC memory manager.
1847 // Input parameters:
1848 // obj - GarbageCollectorMXBean object
1849 // gc_stat - caller allocated jmmGCStat where:
1850 // a. before_gc_usage - array of MemoryUsage objects
1851 // b. after_gc_usage - array of MemoryUsage objects
1852 // c. gc_ext_attributes_values_size is set to the
1853 // gc_ext_attribute_values array allocated
1854 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1855 //
1856 // On return,
1857 // gc_index == 0 indicates no GC statistics available
1858 //
1859 // before_gc_usage and after_gc_usage - filled with per memory pool
1860 // before and after GC usage in the same order as the memory pools
1861 // returned by GetMemoryPools for a given GC memory manager.
1862 // num_gc_ext_attributes indicates the number of elements in
1863 // the gc_ext_attribute_values array is filled; or
1864 // -1 if the gc_ext_attributes_values array is not big enough
1865 //
1866 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1867 ResourceMark rm(THREAD);
1868
1869 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == nullptr) {
1870 THROW(vmSymbols::java_lang_NullPointerException());
1871 }
1872
1873 // Get the GCMemoryManager
1874 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1875
1876 // Make a copy of the last GC statistics
1877 // GC may occur while constructing the last GC information
1878 int num_pools = MemoryService::num_memory_pools();
1879 GCStatInfo stat(num_pools);
1880 if (mgr->get_last_gc_stat(&stat) == 0) {
1881 gc_stat->gc_index = 0;
1882 return;
1883 }
1884
1885 gc_stat->gc_index = stat.gc_index();
1886 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
1887 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
1888
1889 // Current implementation does not have GC extension attributes
1890 gc_stat->num_gc_ext_attributes = 0;
1891
1892 // Fill the arrays of MemoryUsage objects with before and after GC
1893 // per pool memory usage
1894 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
1895 num_pools,
1896 CHECK);
1897 objArrayHandle usage_before_gc_ah(THREAD, bu);
1898
1899 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
1900 num_pools,
1901 CHECK);
1902 objArrayHandle usage_after_gc_ah(THREAD, au);
1903
1904 for (int i = 0; i < num_pools; i++) {
1905 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
1906 Handle after_usage;
1907
1908 MemoryUsage u = stat.after_gc_usage_for_pool(i);
1909 if (u.max_size() == 0 && u.used() > 0) {
1910 // If max size == 0, this pool is a survivor space.
1911 // Set max size = -1 since the pools will be swapped after GC.
1912 MemoryUsage usage(u.init_size(), u.used(), u.committed(), MemoryUsage::undefined_size());
1913 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
1914 } else {
1915 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
1916 }
1917 usage_before_gc_ah->obj_at_put(i, before_usage());
1918 usage_after_gc_ah->obj_at_put(i, after_usage());
1919 }
1920
1921 if (gc_stat->gc_ext_attribute_values_size > 0) {
1922 // Current implementation only has 1 attribute (number of GC threads)
1923 // The type is 'I'
1924 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
1925 }
1926 JVM_END
1927
1928 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
1929 ResourceMark rm(THREAD);
1930 // Get the GCMemoryManager
1931 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1932 mgr->set_notification_enabled(enabled?true:false);
1933 JVM_END
1934
1935 // Dump heap - Returns 0 if succeeds.
1936 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
1937 #if INCLUDE_SERVICES
1938 ResourceMark rm(THREAD);
1939 oop on = JNIHandles::resolve_external_guard(outputfile);
1940 if (on == nullptr) {
1941 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
1942 "Output file name cannot be null.", -1);
1943 }
1944 Handle onhandle(THREAD, on);
1945 char* name = java_lang_String::as_platform_dependent_str(onhandle, CHECK_(-1));
1946 if (name == nullptr) {
1947 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
1948 "Output file name cannot be null.", -1);
1949 }
1950 HeapDumper dumper(live ? true : false);
1951 if (dumper.dump(name) != 0) {
1952 const char* errmsg = dumper.error_as_C_string();
1953 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
1954 }
1955 return 0;
1956 #else // INCLUDE_SERVICES
1957 return -1;
1958 #endif // INCLUDE_SERVICES
1959 JVM_END
1960
1961 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
1962 ResourceMark rm(THREAD);
1963 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
1964 objArrayOop cmd_array_oop = oopFactory::new_objArray(vmClasses::String_klass(),
1965 dcmd_list->length(), CHECK_NULL);
1966 objArrayHandle cmd_array(THREAD, cmd_array_oop);
1967 for (int i = 0; i < dcmd_list->length(); i++) {
1968 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
1969 cmd_array->obj_at_put(i, cmd_name);
1970 }
1971 return (jobjectArray) JNIHandles::make_local(THREAD, cmd_array());
1972 JVM_END
1973
1974 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
1975 dcmdInfo* infoArray))
1976 if (cmds == nullptr || infoArray == nullptr) {
1977 THROW(vmSymbols::java_lang_NullPointerException());
1978 }
1979
1980 ResourceMark rm(THREAD);
1981
1982 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
1983 objArrayHandle cmds_ah(THREAD, ca);
1984
1985 // Make sure we have a String array
1986 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
1987 if (element_klass != vmClasses::String_klass()) {
1988 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1989 "Array element type is not String class");
1990 }
1991
1992 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
1993
1994 int num_cmds = cmds_ah->length();
1995 for (int i = 0; i < num_cmds; i++) {
1996 oop cmd = cmds_ah->obj_at(i);
1997 if (cmd == nullptr) {
1998 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1999 "Command name cannot be null.");
2000 }
2001 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2002 if (cmd_name == nullptr) {
2003 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2004 "Command name cannot be null.");
2005 }
2006 int pos = info_list->find_if([&](DCmdInfo* info) {
2007 return info->name_equals(cmd_name);
2008 });
2009 if (pos == -1) {
2010 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2011 "Unknown diagnostic command");
2012 }
2013 DCmdInfo* info = info_list->at(pos);
2014 infoArray[i].name = info->name();
2015 infoArray[i].description = info->description();
2016 infoArray[i].impact = info->impact();
2017 JavaPermission p = info->permission();
2018 infoArray[i].permission_class = p._class;
2019 infoArray[i].permission_name = p._name;
2020 infoArray[i].permission_action = p._action;
2021 infoArray[i].num_arguments = info->num_arguments();
2022 infoArray[i].enabled = info->is_enabled();
2023 }
2024 JVM_END
2025
2026 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2027 jstring command, dcmdArgInfo* infoArray, jint count))
2028 ResourceMark rm(THREAD);
2029 oop cmd = JNIHandles::resolve_external_guard(command);
2030 if (cmd == nullptr) {
2031 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2032 "Command line cannot be null.");
2033 }
2034 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2035 if (cmd_name == nullptr) {
2036 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2037 "Command line content cannot be null.");
2038 }
2039 DCmd* dcmd = nullptr;
2040 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2041 strlen(cmd_name));
2042 if (factory != nullptr) {
2043 dcmd = factory->create_resource_instance(nullptr);
2044 }
2045 if (dcmd == nullptr) {
2046 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2047 "Unknown diagnostic command");
2048 }
2049 DCmdMark mark(dcmd);
2050 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2051 const int num_args = array->length();
2052 if (num_args != count) {
2053 assert(false, "jmm_GetDiagnosticCommandArgumentsInfo count mismatch (%d vs %d)", count, num_args);
2054 THROW_MSG(vmSymbols::java_lang_InternalError(), "jmm_GetDiagnosticCommandArgumentsInfo count mismatch");
2055 }
2056 for (int i = 0; i < num_args; i++) {
2057 infoArray[i].name = array->at(i)->name();
2058 infoArray[i].description = array->at(i)->description();
2059 infoArray[i].type = array->at(i)->type();
2060 infoArray[i].default_string = array->at(i)->default_string();
2061 infoArray[i].mandatory = array->at(i)->is_mandatory();
2062 infoArray[i].option = array->at(i)->is_option();
2063 infoArray[i].multiple = array->at(i)->is_multiple();
2064 infoArray[i].position = array->at(i)->position();
2065 }
2066 return;
2067 JVM_END
2068
2069 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2070 ResourceMark rm(THREAD);
2071 oop cmd = JNIHandles::resolve_external_guard(commandline);
2072 if (cmd == nullptr) {
2073 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2074 "Command line cannot be null.");
2075 }
2076 char* cmdline = java_lang_String::as_utf8_string(cmd);
2077 if (cmdline == nullptr) {
2078 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2079 "Command line content cannot be null.");
2080 }
2081 bufferedStream output;
2082 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2083 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2084 return (jstring) JNIHandles::make_local(THREAD, result);
2085 JVM_END
2086
2087 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2088 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2089 JVM_END
2090
2091 jlong Management::ticks_to_ms(jlong ticks) {
2092 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2093 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2094 * (double)1000.0);
2095 }
2096
2097 jlong Management::ticks_to_us(jlong ticks) {
2098 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2099 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2100 * (double)1000000.0);
2101 }
2102
2103 // Gets the amount of memory allocated on the Java heap since JVM launch.
2104 JVM_ENTRY(jlong, jmm_GetTotalThreadAllocatedMemory(JNIEnv *env))
2105 // A thread increments exited_allocated_bytes in ThreadService::remove_thread
2106 // only after it removes itself from the threads list, and once a TLH is
2107 // created, no thread it references can remove itself from the threads
2108 // list, so none can update exited_allocated_bytes. We therefore initialize
2109 // result with exited_allocated_bytes after after we create the TLH so that
2110 // the final result can only be short due to (1) threads that start after
2111 // the TLH is created, or (2) terminating threads that escape TLH creation
2112 // and don't update exited_allocated_bytes before we initialize result.
2113
2114 // We keep a high water mark to ensure monotonicity in case threads counted
2115 // on a previous call end up in state (2).
2116 static jlong high_water_result = 0;
2117
2118 JavaThreadIteratorWithHandle jtiwh;
2119 jlong result = ThreadService::exited_allocated_bytes();
2120 for (; JavaThread* thread = jtiwh.next();) {
2121 jlong size = thread->cooked_allocated_bytes();
2122 result += size;
2123 }
2124
2125 {
2126 assert(MonitoringSupport_lock != nullptr, "Must be");
2127 MutexLocker ml(MonitoringSupport_lock, Mutex::_no_safepoint_check_flag);
2128 if (result < high_water_result) {
2129 // Encountered (2) above, or result wrapped to a negative value. In
2130 // the latter case, it's pegged at the last positive value.
2131 result = high_water_result;
2132 } else {
2133 high_water_result = result;
2134 }
2135 }
2136 return result;
2137 JVM_END
2138
2139 // Gets the amount of memory allocated on the Java heap for a single thread.
2140 // Returns -1 if the thread does not exist or has terminated.
2141 JVM_ENTRY(jlong, jmm_GetOneThreadAllocatedMemory(JNIEnv *env, jlong thread_id))
2142 if (thread_id < 0) {
2143 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2144 "Invalid thread ID", -1);
2145 }
2146
2147 if (thread_id == 0) { // current thread
2148 return thread->cooked_allocated_bytes();
2149 }
2150
2151 ThreadsListHandle tlh;
2152 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
2153 if (is_platform_thread(java_thread)) {
2154 return java_thread->cooked_allocated_bytes();
2155 }
2156 return -1;
2157 JVM_END
2158
2159 // Gets an array containing the amount of memory allocated on the Java
2160 // heap for a set of threads (in bytes). Each element of the array is
2161 // the amount of memory allocated for the thread ID specified in the
2162 // corresponding entry in the given array of thread IDs; or -1 if the
2163 // thread does not exist or has terminated.
2164 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2165 jlongArray sizeArray))
2166 // Check if threads is null
2167 if (ids == nullptr || sizeArray == nullptr) {
2168 THROW(vmSymbols::java_lang_NullPointerException());
2169 }
2170
2171 ResourceMark rm(THREAD);
2172 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2173 typeArrayHandle ids_ah(THREAD, ta);
2174
2175 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2176 typeArrayHandle sizeArray_h(THREAD, sa);
2177
2178 // validate the thread id array
2179 validate_thread_id_array(ids_ah, CHECK);
2180
2181 // sizeArray must be of the same length as the given array of thread IDs
2182 int num_threads = ids_ah->length();
2183 if (num_threads != sizeArray_h->length()) {
2184 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2185 "The length of the given long array does not match the length of "
2186 "the given array of thread IDs");
2187 }
2188
2189 ThreadsListHandle tlh;
2190 for (int i = 0; i < num_threads; i++) {
2191 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(ids_ah->long_at(i));
2192 if (is_platform_thread(java_thread)) {
2193 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2194 }
2195 }
2196 JVM_END
2197
2198 // Returns the CPU time consumed by a given thread (in nanoseconds).
2199 // If thread_id == 0, CPU time for the current thread is returned.
2200 // If user_sys_cpu_time = true, user level and system CPU time of
2201 // a given thread is returned; otherwise, only user level CPU time
2202 // is returned.
2203 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2204 if (!os::is_thread_cpu_time_supported()) {
2205 return -1;
2206 }
2207
2208 if (thread_id < 0) {
2209 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2210 "Invalid thread ID", -1);
2211 }
2212
2213 JavaThread* java_thread = nullptr;
2214 if (thread_id == 0) {
2215 // current thread
2216 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2217 } else {
2218 ThreadsListHandle tlh;
2219 java_thread = tlh.list()->find_JavaThread_from_java_tid(thread_id);
2220 if (is_platform_thread(java_thread)) {
2221 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2222 }
2223 }
2224 return -1;
2225 JVM_END
2226
2227 // Gets an array containing the CPU times consumed by a set of threads
2228 // (in nanoseconds). Each element of the array is the CPU time for the
2229 // thread ID specified in the corresponding entry in the given array
2230 // of thread IDs; or -1 if the thread does not exist or has terminated.
2231 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2232 // for the given thread is returned; otherwise, only user level CPU time
2233 // is returned.
2234 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2235 jlongArray timeArray,
2236 jboolean user_sys_cpu_time))
2237 // Check if threads is null
2238 if (ids == nullptr || timeArray == nullptr) {
2239 THROW(vmSymbols::java_lang_NullPointerException());
2240 }
2241
2242 ResourceMark rm(THREAD);
2243 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2244 typeArrayHandle ids_ah(THREAD, ta);
2245
2246 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2247 typeArrayHandle timeArray_h(THREAD, tia);
2248
2249 // validate the thread id array
2250 validate_thread_id_array(ids_ah, CHECK);
2251
2252 // timeArray must be of the same length as the given array of thread IDs
2253 int num_threads = ids_ah->length();
2254 if (num_threads != timeArray_h->length()) {
2255 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2256 "The length of the given long array does not match the length of "
2257 "the given array of thread IDs");
2258 }
2259
2260 ThreadsListHandle tlh;
2261 for (int i = 0; i < num_threads; i++) {
2262 JavaThread* java_thread = tlh.list()->find_JavaThread_from_java_tid(ids_ah->long_at(i));
2263 if (is_platform_thread(java_thread)) {
2264 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2265 user_sys_cpu_time != 0));
2266 }
2267 }
2268 JVM_END
2269
2270 const struct jmmInterface_1_ jmm_interface = {
2271 nullptr,
2272 nullptr,
2273 jmm_GetVersion,
2274 jmm_GetOptionalSupport,
2275 jmm_GetThreadInfo,
2276 jmm_GetMemoryPools,
2277 jmm_GetMemoryManagers,
2278 jmm_GetMemoryPoolUsage,
2279 jmm_GetPeakMemoryPoolUsage,
2280 jmm_GetTotalThreadAllocatedMemory,
2281 jmm_GetOneThreadAllocatedMemory,
2282 jmm_GetThreadAllocatedMemory,
2283 jmm_GetMemoryUsage,
2284 jmm_GetLongAttribute,
2285 jmm_GetBoolAttribute,
2286 jmm_SetBoolAttribute,
2287 jmm_GetLongAttributes,
2288 jmm_FindMonitorDeadlockedThreads,
2289 jmm_GetThreadCpuTime,
2290 jmm_GetVMGlobalNames,
2291 jmm_GetVMGlobals,
2292 jmm_GetInternalThreadTimes,
2293 jmm_ResetStatistic,
2294 jmm_SetPoolSensor,
2295 jmm_SetPoolThreshold,
2296 jmm_GetPoolCollectionUsage,
2297 jmm_GetGCExtAttributeInfo,
2298 jmm_GetLastGCStat,
2299 jmm_GetThreadCpuTimeWithKind,
2300 jmm_GetThreadCpuTimesWithKind,
2301 jmm_DumpHeap0,
2302 jmm_FindDeadlockedThreads,
2303 jmm_SetVMGlobal,
2304 nullptr,
2305 jmm_DumpThreads,
2306 jmm_SetGCNotificationEnabled,
2307 jmm_GetDiagnosticCommands,
2308 jmm_GetDiagnosticCommandInfo,
2309 jmm_GetDiagnosticCommandArgumentsInfo,
2310 jmm_ExecuteDiagnosticCommand,
2311 jmm_SetDiagnosticFrameworkNotificationEnabled
2312 };
2313 #endif // INCLUDE_MANAGEMENT
2314
2315 void* Management::get_jmm_interface(int version) {
2316 #if INCLUDE_MANAGEMENT
2317 if (version == JMM_VERSION) {
2318 return (void*) &jmm_interface;
2319 }
2320 #endif // INCLUDE_MANAGEMENT
2321 return nullptr;
2322 }