1 /*
2 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "compiler/compileBroker.hpp"
28 #include "memory/iterator.hpp"
29 #include "memory/oopFactory.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/klass.hpp"
32 #include "oops/objArrayKlass.hpp"
33 #include "oops/objArrayOop.inline.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "runtime/arguments.hpp"
36 #include "runtime/globals.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "runtime/interfaceSupport.hpp"
39 #include "runtime/javaCalls.hpp"
40 #include "runtime/jniHandles.hpp"
41 #include "runtime/os.hpp"
42 #include "runtime/serviceThread.hpp"
43 #include "runtime/thread.inline.hpp"
44 #include "services/classLoadingService.hpp"
45 #include "services/diagnosticCommand.hpp"
46 #include "services/diagnosticFramework.hpp"
47 #include "services/writeableFlags.hpp"
48 #include "services/heapDumper.hpp"
49 #include "services/jmm.h"
50 #include "services/lowMemoryDetector.hpp"
51 #include "services/gcNotifier.hpp"
52 #include "services/nmtDCmd.hpp"
53 #include "services/management.hpp"
54 #include "services/memoryManager.hpp"
55 #include "services/memoryPool.hpp"
56 #include "services/memoryService.hpp"
57 #include "services/runtimeService.hpp"
58 #include "services/threadService.hpp"
59 #include "utilities/macros.hpp"
60
61 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
62
63 PerfVariable* Management::_begin_vm_creation_time = NULL;
64 PerfVariable* Management::_end_vm_creation_time = NULL;
65 PerfVariable* Management::_vm_init_done_time = NULL;
66
67 Klass* Management::_diagnosticCommandImpl_klass = NULL;
68 Klass* Management::_garbageCollectorExtImpl_klass = NULL;
69 Klass* Management::_garbageCollectorMXBean_klass = NULL;
70 Klass* Management::_gcInfo_klass = NULL;
71 Klass* Management::_managementFactoryHelper_klass = NULL;
72 Klass* Management::_memoryManagerMXBean_klass = NULL;
73 Klass* Management::_memoryPoolMXBean_klass = NULL;
74 Klass* Management::_memoryUsage_klass = NULL;
75 Klass* Management::_sensor_klass = NULL;
76 Klass* Management::_threadInfo_klass = NULL;
77
78 jmmOptionalSupport Management::_optional_support = {0};
79 TimeStamp Management::_stamp;
80
81 void management_init() {
82 #if INCLUDE_MANAGEMENT
83 Management::init();
84 ThreadService::init();
85 RuntimeService::init();
86 ClassLoadingService::init();
87 #else
88 ThreadService::init();
89 #endif // INCLUDE_MANAGEMENT
90 }
91
92 #if INCLUDE_MANAGEMENT
93
94 void Management::init() {
95 EXCEPTION_MARK;
96
97 // These counters are for java.lang.management API support.
98 // They are created even if -XX:-UsePerfData is set and in
99 // that case, they will be allocated on C heap.
100
101 _begin_vm_creation_time =
102 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
103 PerfData::U_None, CHECK);
104
105 _end_vm_creation_time =
106 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
107 PerfData::U_None, CHECK);
108
109 _vm_init_done_time =
110 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
111 PerfData::U_None, CHECK);
112
113 // Initialize optional support
114 _optional_support.isLowMemoryDetectionSupported = 1;
115 _optional_support.isCompilationTimeMonitoringSupported = 1;
116 _optional_support.isThreadContentionMonitoringSupported = 1;
117
118 if (os::is_thread_cpu_time_supported()) {
119 _optional_support.isCurrentThreadCpuTimeSupported = 1;
120 _optional_support.isOtherThreadCpuTimeSupported = 1;
121 } else {
122 _optional_support.isCurrentThreadCpuTimeSupported = 0;
123 _optional_support.isOtherThreadCpuTimeSupported = 0;
124 }
125
126 _optional_support.isBootClassPathSupported = 1;
127 _optional_support.isObjectMonitorUsageSupported = 1;
128 #if INCLUDE_SERVICES
129 // This depends on the heap inspector
130 _optional_support.isSynchronizerUsageSupported = 1;
131 #endif // INCLUDE_SERVICES
132 _optional_support.isThreadAllocatedMemorySupported = 1;
133 _optional_support.isRemoteDiagnosticCommandsSupported = 1;
134
135 // Registration of the diagnostic commands
136 DCmdRegistrant::register_dcmds();
137 DCmdRegistrant::register_dcmds_ext();
138 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
139 | DCmd_Source_MBean;
140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
141 }
142
143 void Management::initialize(TRAPS) {
144 // Start the service thread
145 ServiceThread::initialize();
146
147 if (ManagementServer) {
148 ResourceMark rm(THREAD);
149 HandleMark hm(THREAD);
150
151 // Load and initialize the sun.management.Agent class
152 // invoke startAgent method to start the management server
153 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
154 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_management_Agent(),
155 loader,
156 Handle(),
157 THREAD);
158 if (k == NULL) {
159 vm_exit_during_initialization("Management agent initialization failure: "
160 "class sun.management.Agent not found.");
161 }
162 instanceKlassHandle ik (THREAD, k);
163
164 JavaValue result(T_VOID);
165 JavaCalls::call_static(&result,
166 ik,
167 vmSymbols::startAgent_name(),
168 vmSymbols::void_method_signature(),
169 CHECK);
170 }
171 }
172
173 void Management::get_optional_support(jmmOptionalSupport* support) {
174 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
175 }
176
177 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
178 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
179 instanceKlassHandle ik (THREAD, k);
180 if (ik->should_be_initialized()) {
181 ik->initialize(CHECK_NULL);
182 }
183 // If these classes change to not be owned by the boot loader, they need
184 // to be walked to keep their class loader alive in oops_do.
185 assert(ik->class_loader() == NULL, "need to follow in oops_do");
186 return ik();
187 }
188
189 void Management::record_vm_startup_time(jlong begin, jlong duration) {
190 // if the performance counter is not initialized,
191 // then vm initialization failed; simply return.
192 if (_begin_vm_creation_time == NULL) return;
193
194 _begin_vm_creation_time->set_value(begin);
195 _end_vm_creation_time->set_value(begin + duration);
196 PerfMemory::set_accessible(true);
197 }
198
199 jlong Management::timestamp() {
200 TimeStamp t;
201 t.update();
202 return t.ticks() - _stamp.ticks();
203 }
204
205 void Management::oops_do(OopClosure* f) {
206 MemoryService::oops_do(f);
207 ThreadService::oops_do(f);
208 }
209
210 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
211 if (_threadInfo_klass == NULL) {
212 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
213 }
214 return _threadInfo_klass;
215 }
216
217 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
218 if (_memoryUsage_klass == NULL) {
219 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
220 }
221 return _memoryUsage_klass;
222 }
223
224 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
225 if (_memoryPoolMXBean_klass == NULL) {
226 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
227 }
228 return _memoryPoolMXBean_klass;
229 }
230
231 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
232 if (_memoryManagerMXBean_klass == NULL) {
233 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
234 }
235 return _memoryManagerMXBean_klass;
236 }
237
238 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
239 if (_garbageCollectorMXBean_klass == NULL) {
240 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
241 }
242 return _garbageCollectorMXBean_klass;
243 }
244
245 Klass* Management::sun_management_Sensor_klass(TRAPS) {
246 if (_sensor_klass == NULL) {
247 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
248 }
249 return _sensor_klass;
250 }
251
252 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
253 if (_managementFactoryHelper_klass == NULL) {
254 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
255 }
256 return _managementFactoryHelper_klass;
257 }
258
259 Klass* Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS) {
260 if (_garbageCollectorExtImpl_klass == NULL) {
261 _garbageCollectorExtImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_GarbageCollectorExtImpl(), CHECK_NULL);
262 }
263 return _garbageCollectorExtImpl_klass;
264 }
265
266 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) {
267 if (_gcInfo_klass == NULL) {
268 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
269 }
270 return _gcInfo_klass;
271 }
272
273 Klass* Management::com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS) {
274 if (_diagnosticCommandImpl_klass == NULL) {
275 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_DiagnosticCommandImpl(), CHECK_NULL);
276 }
277 return _diagnosticCommandImpl_klass;
278 }
279
280 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
281 Handle snapshot_thread(THREAD, snapshot->threadObj());
282
283 jlong contended_time;
284 jlong waited_time;
285 if (ThreadService::is_thread_monitoring_contention()) {
286 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
287 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
288 } else {
289 // set them to -1 if thread contention monitoring is disabled.
290 contended_time = max_julong;
291 waited_time = max_julong;
292 }
293
294 int thread_status = snapshot->thread_status();
295 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
296 if (snapshot->is_ext_suspended()) {
297 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
298 }
299 if (snapshot->is_in_native()) {
300 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
301 }
302
303 ThreadStackTrace* st = snapshot->get_stack_trace();
304 Handle stacktrace_h;
305 if (st != NULL) {
306 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
307 } else {
308 stacktrace_h = Handle();
309 }
310
311 args->push_oop(snapshot_thread);
312 args->push_int(thread_status);
313 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
314 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
315 args->push_long(snapshot->contended_enter_count());
316 args->push_long(contended_time);
317 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
318 args->push_long(waited_time);
319 args->push_oop(stacktrace_h);
320 }
321
322 // Helper function to construct a ThreadInfo object
323 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
324 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
325 instanceKlassHandle ik (THREAD, k);
326
327 JavaValue result(T_VOID);
328 JavaCallArguments args(14);
329
330 // First allocate a ThreadObj object and
331 // push the receiver as the first argument
332 Handle element = ik->allocate_instance_handle(CHECK_NULL);
333 args.push_oop(element);
334
335 // initialize the arguments for the ThreadInfo constructor
336 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
337
338 // Call ThreadInfo constructor with no locked monitors and synchronizers
339 JavaCalls::call_special(&result,
340 ik,
341 vmSymbols::object_initializer_name(),
342 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
343 &args,
344 CHECK_NULL);
345
346 return (instanceOop) element();
347 }
348
349 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
350 objArrayHandle monitors_array,
351 typeArrayHandle depths_array,
352 objArrayHandle synchronizers_array,
353 TRAPS) {
354 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
355 instanceKlassHandle ik (THREAD, k);
356
357 JavaValue result(T_VOID);
358 JavaCallArguments args(17);
359
360 // First allocate a ThreadObj object and
361 // push the receiver as the first argument
362 Handle element = ik->allocate_instance_handle(CHECK_NULL);
363 args.push_oop(element);
364
365 // initialize the arguments for the ThreadInfo constructor
366 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
367
368 // push the locked monitors and synchronizers in the arguments
369 args.push_oop(monitors_array);
370 args.push_oop(depths_array);
371 args.push_oop(synchronizers_array);
372
373 // Call ThreadInfo constructor with locked monitors and synchronizers
374 JavaCalls::call_special(&result,
375 ik,
376 vmSymbols::object_initializer_name(),
377 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
378 &args,
379 CHECK_NULL);
380
381 return (instanceOop) element();
382 }
383
384
385 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
386 if (mgr == NULL) {
387 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
388 }
389 oop mgr_obj = JNIHandles::resolve(mgr);
390 instanceHandle h(THREAD, (instanceOop) mgr_obj);
391
392 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
393 if (!h->is_a(k)) {
394 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
395 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
396 NULL);
397 }
398
399 MemoryManager* gc = MemoryService::get_memory_manager(h);
400 if (gc == NULL || !gc->is_gc_memory_manager()) {
401 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
402 "Invalid GC memory manager",
403 NULL);
404 }
405 return (GCMemoryManager*) gc;
406 }
407
408 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
409 if (obj == NULL) {
410 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
411 }
412
413 oop pool_obj = JNIHandles::resolve(obj);
414 assert(pool_obj->is_instance(), "Should be an instanceOop");
415 instanceHandle ph(THREAD, (instanceOop) pool_obj);
416
417 return MemoryService::get_memory_pool(ph);
418 }
419
420 #endif // INCLUDE_MANAGEMENT
421
422 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
423 int num_threads = ids_ah->length();
424
425 // Validate input thread IDs
426 int i = 0;
427 for (i = 0; i < num_threads; i++) {
428 jlong tid = ids_ah->long_at(i);
429 if (tid <= 0) {
430 // throw exception if invalid thread id.
431 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
432 "Invalid thread ID entry");
433 }
434 }
435 }
436
437 #if INCLUDE_MANAGEMENT
438
439 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
440 // check if the element of infoArray is of type ThreadInfo class
441 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
442 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
443 if (element_klass != threadinfo_klass) {
444 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
445 "infoArray element type is not ThreadInfo class");
446 }
447 }
448
449
450 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
451 if (obj == NULL) {
452 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
453 }
454
455 oop mgr_obj = JNIHandles::resolve(obj);
456 assert(mgr_obj->is_instance(), "Should be an instanceOop");
457 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
458
459 return MemoryService::get_memory_manager(mh);
460 }
461
462 // Returns a version string and sets major and minor version if
463 // the input parameters are non-null.
464 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
465 return JMM_VERSION;
466 JVM_END
467
468 // Gets the list of VM monitoring and management optional supports
469 // Returns 0 if succeeded; otherwise returns non-zero.
470 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
471 if (support == NULL) {
472 return -1;
473 }
474 Management::get_optional_support(support);
475 return 0;
476 JVM_END
477
478 // Returns a java.lang.String object containing the input arguments to the VM.
479 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
480 ResourceMark rm(THREAD);
481
482 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
483 return NULL;
484 }
485
486 char** vm_flags = Arguments::jvm_flags_array();
487 char** vm_args = Arguments::jvm_args_array();
488 int num_flags = Arguments::num_jvm_flags();
489 int num_args = Arguments::num_jvm_args();
490
491 size_t length = 1; // null terminator
492 int i;
493 for (i = 0; i < num_flags; i++) {
494 length += strlen(vm_flags[i]);
495 }
496 for (i = 0; i < num_args; i++) {
497 length += strlen(vm_args[i]);
498 }
499 // add a space between each argument
500 length += num_flags + num_args - 1;
501
502 // Return the list of input arguments passed to the VM
503 // and preserve the order that the VM processes.
504 char* args = NEW_RESOURCE_ARRAY(char, length);
505 args[0] = '\0';
506 // concatenate all jvm_flags
507 if (num_flags > 0) {
508 strcat(args, vm_flags[0]);
509 for (i = 1; i < num_flags; i++) {
510 strcat(args, " ");
511 strcat(args, vm_flags[i]);
512 }
513 }
514
515 if (num_args > 0 && num_flags > 0) {
516 // append a space if args already contains one or more jvm_flags
517 strcat(args, " ");
518 }
519
520 // concatenate all jvm_args
521 if (num_args > 0) {
522 strcat(args, vm_args[0]);
523 for (i = 1; i < num_args; i++) {
524 strcat(args, " ");
525 strcat(args, vm_args[i]);
526 }
527 }
528
529 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
530 return JNIHandles::make_local(env, hargs());
531 JVM_END
532
533 // Returns an array of java.lang.String object containing the input arguments to the VM.
534 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
535 ResourceMark rm(THREAD);
536
537 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
538 return NULL;
539 }
540
541 char** vm_flags = Arguments::jvm_flags_array();
542 char** vm_args = Arguments::jvm_args_array();
543 int num_flags = Arguments::num_jvm_flags();
544 int num_args = Arguments::num_jvm_args();
545
546 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass());
547 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
548 objArrayHandle result_h(THREAD, r);
549
550 int index = 0;
551 for (int j = 0; j < num_flags; j++, index++) {
552 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
553 result_h->obj_at_put(index, h());
554 }
555 for (int i = 0; i < num_args; i++, index++) {
556 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
557 result_h->obj_at_put(index, h());
558 }
559 return (jobjectArray) JNIHandles::make_local(env, result_h());
560 JVM_END
561
562 // Returns an array of java/lang/management/MemoryPoolMXBean object
563 // one for each memory pool if obj == null; otherwise returns
564 // an array of memory pools for a given memory manager if
565 // it is a valid memory manager.
566 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
567 ResourceMark rm(THREAD);
568
569 int num_memory_pools;
570 MemoryManager* mgr = NULL;
571 if (obj == NULL) {
572 num_memory_pools = MemoryService::num_memory_pools();
573 } else {
574 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
575 if (mgr == NULL) {
576 return NULL;
577 }
578 num_memory_pools = mgr->num_memory_pools();
579 }
580
581 // Allocate the resulting MemoryPoolMXBean[] object
582 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
583 instanceKlassHandle ik (THREAD, k);
584 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
585 objArrayHandle poolArray(THREAD, r);
586
587 if (mgr == NULL) {
588 // Get all memory pools
589 for (int i = 0; i < num_memory_pools; i++) {
590 MemoryPool* pool = MemoryService::get_memory_pool(i);
591 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
592 instanceHandle ph(THREAD, p);
593 poolArray->obj_at_put(i, ph());
594 }
595 } else {
596 // Get memory pools managed by a given memory manager
597 for (int i = 0; i < num_memory_pools; i++) {
598 MemoryPool* pool = mgr->get_memory_pool(i);
599 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
600 instanceHandle ph(THREAD, p);
601 poolArray->obj_at_put(i, ph());
602 }
603 }
604 return (jobjectArray) JNIHandles::make_local(env, poolArray());
605 JVM_END
606
607 // Returns an array of java/lang/management/MemoryManagerMXBean object
608 // one for each memory manager if obj == null; otherwise returns
609 // an array of memory managers for a given memory pool if
610 // it is a valid memory pool.
611 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
612 ResourceMark rm(THREAD);
613
614 int num_mgrs;
615 MemoryPool* pool = NULL;
616 if (obj == NULL) {
617 num_mgrs = MemoryService::num_memory_managers();
618 } else {
619 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
620 if (pool == NULL) {
621 return NULL;
622 }
623 num_mgrs = pool->num_memory_managers();
624 }
625
626 // Allocate the resulting MemoryManagerMXBean[] object
627 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
628 instanceKlassHandle ik (THREAD, k);
629 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
630 objArrayHandle mgrArray(THREAD, r);
631
632 if (pool == NULL) {
633 // Get all memory managers
634 for (int i = 0; i < num_mgrs; i++) {
635 MemoryManager* mgr = MemoryService::get_memory_manager(i);
636 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
637 instanceHandle ph(THREAD, p);
638 mgrArray->obj_at_put(i, ph());
639 }
640 } else {
641 // Get memory managers for a given memory pool
642 for (int i = 0; i < num_mgrs; i++) {
643 MemoryManager* mgr = pool->get_memory_manager(i);
644 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
645 instanceHandle ph(THREAD, p);
646 mgrArray->obj_at_put(i, ph());
647 }
648 }
649 return (jobjectArray) JNIHandles::make_local(env, mgrArray());
650 JVM_END
651
652
653 // Returns a java/lang/management/MemoryUsage object containing the memory usage
654 // of a given memory pool.
655 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
656 ResourceMark rm(THREAD);
657
658 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
659 if (pool != NULL) {
660 MemoryUsage usage = pool->get_memory_usage();
661 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
662 return JNIHandles::make_local(env, h());
663 } else {
664 return NULL;
665 }
666 JVM_END
667
668 // Returns a java/lang/management/MemoryUsage object containing the memory usage
669 // of a given memory pool.
670 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
671 ResourceMark rm(THREAD);
672
673 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
674 if (pool != NULL) {
675 MemoryUsage usage = pool->get_peak_memory_usage();
676 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
677 return JNIHandles::make_local(env, h());
678 } else {
679 return NULL;
680 }
681 JVM_END
682
683 // Returns a java/lang/management/MemoryUsage object containing the memory usage
684 // of a given memory pool after most recent GC.
685 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
686 ResourceMark rm(THREAD);
687
688 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
689 if (pool != NULL && pool->is_collected_pool()) {
690 MemoryUsage usage = pool->get_last_collection_usage();
691 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
692 return JNIHandles::make_local(env, h());
693 } else {
694 return NULL;
695 }
696 JVM_END
697
698 // Sets the memory pool sensor for a threshold type
699 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
700 if (obj == NULL || sensorObj == NULL) {
701 THROW(vmSymbols::java_lang_NullPointerException());
702 }
703
704 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
705 oop s = JNIHandles::resolve(sensorObj);
706 assert(s->is_instance(), "Sensor should be an instanceOop");
707 instanceHandle sensor_h(THREAD, (instanceOop) s);
708 if (!sensor_h->is_a(sensor_klass)) {
709 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
710 "Sensor is not an instance of sun.management.Sensor class");
711 }
712
713 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
714 assert(mpool != NULL, "MemoryPool should exist");
715
716 switch (type) {
717 case JMM_USAGE_THRESHOLD_HIGH:
718 case JMM_USAGE_THRESHOLD_LOW:
719 // have only one sensor for threshold high and low
720 mpool->set_usage_sensor_obj(sensor_h);
721 break;
722 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
723 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
724 // have only one sensor for threshold high and low
725 mpool->set_gc_usage_sensor_obj(sensor_h);
726 break;
727 default:
728 assert(false, "Unrecognized type");
729 }
730
731 JVM_END
732
733
734 // Sets the threshold of a given memory pool.
735 // Returns the previous threshold.
736 //
737 // Input parameters:
738 // pool - the MemoryPoolMXBean object
739 // type - threshold type
740 // threshold - the new threshold (must not be negative)
741 //
742 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
743 if (threshold < 0) {
744 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
745 "Invalid threshold value",
746 -1);
747 }
748
749 if ((size_t)threshold > max_uintx) {
750 stringStream st;
751 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx);
752 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
753 }
754
755 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
756 assert(pool != NULL, "MemoryPool should exist");
757
758 jlong prev = 0;
759 switch (type) {
760 case JMM_USAGE_THRESHOLD_HIGH:
761 if (!pool->usage_threshold()->is_high_threshold_supported()) {
762 return -1;
763 }
764 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
765 break;
766
767 case JMM_USAGE_THRESHOLD_LOW:
768 if (!pool->usage_threshold()->is_low_threshold_supported()) {
769 return -1;
770 }
771 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
772 break;
773
774 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
775 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
776 return -1;
777 }
778 // return and the new threshold is effective for the next GC
779 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
780
781 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
782 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
783 return -1;
784 }
785 // return and the new threshold is effective for the next GC
786 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
787
788 default:
789 assert(false, "Unrecognized type");
790 return -1;
791 }
792
793 // When the threshold is changed, reevaluate if the low memory
794 // detection is enabled.
795 if (prev != threshold) {
796 LowMemoryDetector::recompute_enabled_for_collected_pools();
797 LowMemoryDetector::detect_low_memory(pool);
798 }
799 return prev;
800 JVM_END
801
802 // Returns a java/lang/management/MemoryUsage object representing
803 // the memory usage for the heap or non-heap memory.
804 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
805 ResourceMark rm(THREAD);
806
807 // Calculate the memory usage
808 size_t total_init = 0;
809 size_t total_used = 0;
810 size_t total_committed = 0;
811 size_t total_max = 0;
812 bool has_undefined_init_size = false;
813 bool has_undefined_max_size = false;
814
815 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
816 MemoryPool* pool = MemoryService::get_memory_pool(i);
817 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
818 MemoryUsage u = pool->get_memory_usage();
819 total_used += u.used();
820 total_committed += u.committed();
821
822 if (u.init_size() == (size_t)-1) {
823 has_undefined_init_size = true;
824 }
825 if (!has_undefined_init_size) {
826 total_init += u.init_size();
827 }
828
829 if (u.max_size() == (size_t)-1) {
830 has_undefined_max_size = true;
831 }
832 if (!has_undefined_max_size) {
833 total_max += u.max_size();
834 }
835 }
836 }
837
838 // if any one of the memory pool has undefined init_size or max_size,
839 // set it to -1
840 if (has_undefined_init_size) {
841 total_init = (size_t)-1;
842 }
843 if (has_undefined_max_size) {
844 total_max = (size_t)-1;
845 }
846
847 MemoryUsage usage((heap ? InitialHeapSize : total_init),
848 total_used,
849 total_committed,
850 (heap ? Universe::heap()->max_capacity() : total_max));
851
852 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
853 return JNIHandles::make_local(env, obj());
854 JVM_END
855
856 // Returns the boolean value of a given attribute.
857 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
858 switch (att) {
859 case JMM_VERBOSE_GC:
860 return MemoryService::get_verbose();
861 case JMM_VERBOSE_CLASS:
862 return ClassLoadingService::get_verbose();
863 case JMM_THREAD_CONTENTION_MONITORING:
864 return ThreadService::is_thread_monitoring_contention();
865 case JMM_THREAD_CPU_TIME:
866 return ThreadService::is_thread_cpu_time_enabled();
867 case JMM_THREAD_ALLOCATED_MEMORY:
868 return ThreadService::is_thread_allocated_memory_enabled();
869 default:
870 assert(0, "Unrecognized attribute");
871 return false;
872 }
873 JVM_END
874
875 // Sets the given boolean attribute and returns the previous value.
876 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
877 switch (att) {
878 case JMM_VERBOSE_GC:
879 return MemoryService::set_verbose(flag != 0);
880 case JMM_VERBOSE_CLASS:
881 return ClassLoadingService::set_verbose(flag != 0);
882 case JMM_THREAD_CONTENTION_MONITORING:
883 return ThreadService::set_thread_monitoring_contention(flag != 0);
884 case JMM_THREAD_CPU_TIME:
885 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
886 case JMM_THREAD_ALLOCATED_MEMORY:
887 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
888 default:
889 assert(0, "Unrecognized attribute");
890 return false;
891 }
892 JVM_END
893
894
895 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
896 switch (att) {
897 case JMM_GC_TIME_MS:
898 return mgr->gc_time_ms();
899
900 case JMM_GC_COUNT:
901 return mgr->gc_count();
902
903 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
904 // current implementation only has 1 ext attribute
905 return 1;
906
907 default:
908 assert(0, "Unrecognized GC attribute");
909 return -1;
910 }
911 }
912
913 class VmThreadCountClosure: public ThreadClosure {
914 private:
915 int _count;
916 public:
917 VmThreadCountClosure() : _count(0) {};
918 void do_thread(Thread* thread);
919 int count() { return _count; }
920 };
921
922 void VmThreadCountClosure::do_thread(Thread* thread) {
923 // exclude externally visible JavaThreads
924 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
925 return;
926 }
927
928 _count++;
929 }
930
931 static jint get_vm_thread_count() {
932 VmThreadCountClosure vmtcc;
933 {
934 MutexLockerEx ml(Threads_lock);
935 Threads::threads_do(&vmtcc);
936 }
937
938 return vmtcc.count();
939 }
940
941 static jint get_num_flags() {
942 // last flag entry is always NULL, so subtract 1
943 int nFlags = (int) Flag::numFlags - 1;
944 int count = 0;
945 for (int i = 0; i < nFlags; i++) {
946 Flag* flag = &Flag::flags[i];
947 // Exclude the locked (diagnostic, experimental) flags
948 if (flag->is_unlocked() || flag->is_unlocker()) {
949 count++;
950 }
951 }
952 return count;
953 }
954
955 static jlong get_long_attribute(jmmLongAttribute att) {
956 switch (att) {
957 case JMM_CLASS_LOADED_COUNT:
958 return ClassLoadingService::loaded_class_count();
959
960 case JMM_CLASS_UNLOADED_COUNT:
961 return ClassLoadingService::unloaded_class_count();
962
963 case JMM_THREAD_TOTAL_COUNT:
964 return ThreadService::get_total_thread_count();
965
966 case JMM_THREAD_LIVE_COUNT:
967 return ThreadService::get_live_thread_count();
968
969 case JMM_THREAD_PEAK_COUNT:
970 return ThreadService::get_peak_thread_count();
971
972 case JMM_THREAD_DAEMON_COUNT:
973 return ThreadService::get_daemon_thread_count();
974
975 case JMM_JVM_INIT_DONE_TIME_MS:
976 return Management::vm_init_done_time();
977
978 case JMM_JVM_UPTIME_MS:
979 return Management::ticks_to_ms(os::elapsed_counter());
980
981 case JMM_COMPILE_TOTAL_TIME_MS:
982 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
983
984 case JMM_OS_PROCESS_ID:
985 return os::current_process_id();
986
987 // Hotspot-specific counters
988 case JMM_CLASS_LOADED_BYTES:
989 return ClassLoadingService::loaded_class_bytes();
990
991 case JMM_CLASS_UNLOADED_BYTES:
992 return ClassLoadingService::unloaded_class_bytes();
993
994 case JMM_SHARED_CLASS_LOADED_COUNT:
995 return ClassLoadingService::loaded_shared_class_count();
996
997 case JMM_SHARED_CLASS_UNLOADED_COUNT:
998 return ClassLoadingService::unloaded_shared_class_count();
999
1000
1001 case JMM_SHARED_CLASS_LOADED_BYTES:
1002 return ClassLoadingService::loaded_shared_class_bytes();
1003
1004 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1005 return ClassLoadingService::unloaded_shared_class_bytes();
1006
1007 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1008 return ClassLoader::classloader_time_ms();
1009
1010 case JMM_VM_GLOBAL_COUNT:
1011 return get_num_flags();
1012
1013 case JMM_SAFEPOINT_COUNT:
1014 return RuntimeService::safepoint_count();
1015
1016 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1017 return RuntimeService::safepoint_sync_time_ms();
1018
1019 case JMM_TOTAL_STOPPED_TIME_MS:
1020 return RuntimeService::safepoint_time_ms();
1021
1022 case JMM_TOTAL_APP_TIME_MS:
1023 return RuntimeService::application_time_ms();
1024
1025 case JMM_VM_THREAD_COUNT:
1026 return get_vm_thread_count();
1027
1028 case JMM_CLASS_INIT_TOTAL_COUNT:
1029 return ClassLoader::class_init_count();
1030
1031 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1032 return ClassLoader::class_init_time_ms();
1033
1034 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1035 return ClassLoader::class_verify_time_ms();
1036
1037 case JMM_METHOD_DATA_SIZE_BYTES:
1038 return ClassLoadingService::class_method_data_size();
1039
1040 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1041 return os::physical_memory();
1042
1043 default:
1044 return -1;
1045 }
1046 }
1047
1048
1049 // Returns the long value of a given attribute.
1050 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
1051 if (obj == NULL) {
1052 return get_long_attribute(att);
1053 } else {
1054 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
1055 if (mgr != NULL) {
1056 return get_gc_attribute(mgr, att);
1057 }
1058 }
1059 return -1;
1060 JVM_END
1061
1062 // Gets the value of all attributes specified in the given array
1063 // and sets the value in the result array.
1064 // Returns the number of attributes found.
1065 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1066 jobject obj,
1067 jmmLongAttribute* atts,
1068 jint count,
1069 jlong* result))
1070
1071 int num_atts = 0;
1072 if (obj == NULL) {
1073 for (int i = 0; i < count; i++) {
1074 result[i] = get_long_attribute(atts[i]);
1075 if (result[i] != -1) {
1076 num_atts++;
1077 }
1078 }
1079 } else {
1080 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1081 for (int i = 0; i < count; i++) {
1082 result[i] = get_gc_attribute(mgr, atts[i]);
1083 if (result[i] != -1) {
1084 num_atts++;
1085 }
1086 }
1087 }
1088 return num_atts;
1089 JVM_END
1090
1091 // Helper function to do thread dump for a specific list of threads
1092 static void do_thread_dump(ThreadDumpResult* dump_result,
1093 typeArrayHandle ids_ah, // array of thread ID (long[])
1094 int num_threads,
1095 int max_depth,
1096 bool with_locked_monitors,
1097 bool with_locked_synchronizers,
1098 TRAPS) {
1099 // no need to actually perform thread dump if no TIDs are specified
1100 if (num_threads == 0) return;
1101
1102 // First get an array of threadObj handles.
1103 // A JavaThread may terminate before we get the stack trace.
1104 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1105 {
1106 MutexLockerEx ml(Threads_lock);
1107 for (int i = 0; i < num_threads; i++) {
1108 jlong tid = ids_ah->long_at(i);
1109 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1110 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
1111 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1112 thread_handle_array->append(threadObj_h);
1113 }
1114 }
1115
1116 // Obtain thread dumps and thread snapshot information
1117 VM_ThreadDump op(dump_result,
1118 thread_handle_array,
1119 num_threads,
1120 max_depth, /* stack depth */
1121 with_locked_monitors,
1122 with_locked_synchronizers);
1123 VMThread::execute(&op);
1124 }
1125
1126 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1127 // for the thread ID specified in the corresponding entry in
1128 // the given array of thread IDs; or NULL if the thread does not exist
1129 // or has terminated.
1130 //
1131 // Input parameters:
1132 // ids - array of thread IDs
1133 // maxDepth - the maximum depth of stack traces to be dumped:
1134 // maxDepth == -1 requests to dump entire stack trace.
1135 // maxDepth == 0 requests no stack trace.
1136 // infoArray - array of ThreadInfo objects
1137 //
1138 // QQQ - Why does this method return a value instead of void?
1139 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1140 // Check if threads is null
1141 if (ids == NULL || infoArray == NULL) {
1142 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1143 }
1144
1145 if (maxDepth < -1) {
1146 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1147 "Invalid maxDepth", -1);
1148 }
1149
1150 ResourceMark rm(THREAD);
1151 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1152 typeArrayHandle ids_ah(THREAD, ta);
1153
1154 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1155 objArrayOop oa = objArrayOop(infoArray_obj);
1156 objArrayHandle infoArray_h(THREAD, oa);
1157
1158 // validate the thread id array
1159 validate_thread_id_array(ids_ah, CHECK_0);
1160
1161 // validate the ThreadInfo[] parameters
1162 validate_thread_info_array(infoArray_h, CHECK_0);
1163
1164 // infoArray must be of the same length as the given array of thread IDs
1165 int num_threads = ids_ah->length();
1166 if (num_threads != infoArray_h->length()) {
1167 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1168 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1169 }
1170
1171 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1172 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1173
1174 // Must use ThreadDumpResult to store the ThreadSnapshot.
1175 // GC may occur after the thread snapshots are taken but before
1176 // this function returns. The threadObj and other oops kept
1177 // in the ThreadSnapshot are marked and adjusted during GC.
1178 ThreadDumpResult dump_result(num_threads);
1179
1180 if (maxDepth == 0) {
1181 // no stack trace dumped - do not need to stop the world
1182 {
1183 MutexLockerEx ml(Threads_lock);
1184 for (int i = 0; i < num_threads; i++) {
1185 jlong tid = ids_ah->long_at(i);
1186 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1187 ThreadSnapshot* ts;
1188 if (jt == NULL) {
1189 // if the thread does not exist or now it is terminated,
1190 // create dummy snapshot
1191 ts = new ThreadSnapshot();
1192 } else {
1193 ts = new ThreadSnapshot(jt);
1194 }
1195 dump_result.add_thread_snapshot(ts);
1196 }
1197 }
1198 } else {
1199 // obtain thread dump with the specific list of threads with stack trace
1200 do_thread_dump(&dump_result,
1201 ids_ah,
1202 num_threads,
1203 maxDepth,
1204 false, /* no locked monitor */
1205 false, /* no locked synchronizers */
1206 CHECK_0);
1207 }
1208
1209 int num_snapshots = dump_result.num_snapshots();
1210 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1211 int index = 0;
1212 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1213 // For each thread, create an java/lang/management/ThreadInfo object
1214 // and fill with the thread information
1215
1216 if (ts->threadObj() == NULL) {
1217 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1218 infoArray_h->obj_at_put(index, NULL);
1219 continue;
1220 }
1221
1222 // Create java.lang.management.ThreadInfo object
1223 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1224 infoArray_h->obj_at_put(index, info_obj);
1225 }
1226 return 0;
1227 JVM_END
1228
1229 // Dump thread info for the specified threads.
1230 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1231 // for the thread ID specified in the corresponding entry in
1232 // the given array of thread IDs; or NULL if the thread does not exist
1233 // or has terminated.
1234 //
1235 // Input parameter:
1236 // ids - array of thread IDs; NULL indicates all live threads
1237 // locked_monitors - if true, dump locked object monitors
1238 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1239 //
1240 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1241 ResourceMark rm(THREAD);
1242
1243 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1244 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1245
1246 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1247 int num_threads = (ta != NULL ? ta->length() : 0);
1248 typeArrayHandle ids_ah(THREAD, ta);
1249
1250 ThreadDumpResult dump_result(num_threads); // can safepoint
1251
1252 if (ids_ah() != NULL) {
1253
1254 // validate the thread id array
1255 validate_thread_id_array(ids_ah, CHECK_NULL);
1256
1257 // obtain thread dump of a specific list of threads
1258 do_thread_dump(&dump_result,
1259 ids_ah,
1260 num_threads,
1261 -1, /* entire stack */
1262 (locked_monitors ? true : false), /* with locked monitors */
1263 (locked_synchronizers ? true : false), /* with locked synchronizers */
1264 CHECK_NULL);
1265 } else {
1266 // obtain thread dump of all threads
1267 VM_ThreadDump op(&dump_result,
1268 -1, /* entire stack */
1269 (locked_monitors ? true : false), /* with locked monitors */
1270 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1271 VMThread::execute(&op);
1272 }
1273
1274 int num_snapshots = dump_result.num_snapshots();
1275
1276 // create the result ThreadInfo[] object
1277 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1278 instanceKlassHandle ik (THREAD, k);
1279 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1280 objArrayHandle result_h(THREAD, r);
1281
1282 int index = 0;
1283 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1284 if (ts->threadObj() == NULL) {
1285 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1286 result_h->obj_at_put(index, NULL);
1287 continue;
1288 }
1289
1290 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1291 assert(stacktrace != NULL, "Must have a stack trace dumped");
1292
1293 // Create Object[] filled with locked monitors
1294 // Create int[] filled with the stack depth where a monitor was locked
1295 int num_frames = stacktrace->get_stack_depth();
1296 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1297
1298 // Count the total number of locked monitors
1299 for (int i = 0; i < num_frames; i++) {
1300 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1301 num_locked_monitors += frame->num_locked_monitors();
1302 }
1303
1304 objArrayHandle monitors_array;
1305 typeArrayHandle depths_array;
1306 objArrayHandle synchronizers_array;
1307
1308 if (locked_monitors) {
1309 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1310 // where the thread locked it
1311 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1312 objArrayHandle mh(THREAD, array);
1313 monitors_array = mh;
1314
1315 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1316 typeArrayHandle dh(THREAD, tarray);
1317 depths_array = dh;
1318
1319 int count = 0;
1320 int j = 0;
1321 for (int depth = 0; depth < num_frames; depth++) {
1322 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1323 int len = frame->num_locked_monitors();
1324 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1325 for (j = 0; j < len; j++) {
1326 oop monitor = locked_monitors->at(j);
1327 assert(monitor != NULL, "must be a Java object");
1328 monitors_array->obj_at_put(count, monitor);
1329 depths_array->int_at_put(count, depth);
1330 count++;
1331 }
1332 }
1333
1334 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1335 for (j = 0; j < jni_locked_monitors->length(); j++) {
1336 oop object = jni_locked_monitors->at(j);
1337 assert(object != NULL, "must be a Java object");
1338 monitors_array->obj_at_put(count, object);
1339 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1340 depths_array->int_at_put(count, -1);
1341 count++;
1342 }
1343 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1344 }
1345
1346 if (locked_synchronizers) {
1347 // Create Object[] filled with locked JSR-166 synchronizers
1348 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1349 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1350 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1351 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1352
1353 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1354 objArrayHandle sh(THREAD, array);
1355 synchronizers_array = sh;
1356
1357 for (int k = 0; k < num_locked_synchronizers; k++) {
1358 synchronizers_array->obj_at_put(k, locks->at(k));
1359 }
1360 }
1361
1362 // Create java.lang.management.ThreadInfo object
1363 instanceOop info_obj = Management::create_thread_info_instance(ts,
1364 monitors_array,
1365 depths_array,
1366 synchronizers_array,
1367 CHECK_NULL);
1368 result_h->obj_at_put(index, info_obj);
1369 }
1370
1371 return (jobjectArray) JNIHandles::make_local(env, result_h());
1372 JVM_END
1373
1374 // Returns an array of Class objects.
1375 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1376 ResourceMark rm(THREAD);
1377
1378 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1379
1380 int num_classes = lce.num_loaded_classes();
1381 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1382 objArrayHandle classes_ah(THREAD, r);
1383
1384 for (int i = 0; i < num_classes; i++) {
1385 KlassHandle kh = lce.get_klass(i);
1386 oop mirror = kh()->java_mirror();
1387 classes_ah->obj_at_put(i, mirror);
1388 }
1389
1390 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1391 JVM_END
1392
1393 // Reset statistic. Return true if the requested statistic is reset.
1394 // Otherwise, return false.
1395 //
1396 // Input parameters:
1397 // obj - specify which instance the statistic associated with to be reset
1398 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1399 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1400 // type - the type of statistic to be reset
1401 //
1402 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1403 ResourceMark rm(THREAD);
1404
1405 switch (type) {
1406 case JMM_STAT_PEAK_THREAD_COUNT:
1407 ThreadService::reset_peak_thread_count();
1408 return true;
1409
1410 case JMM_STAT_THREAD_CONTENTION_COUNT:
1411 case JMM_STAT_THREAD_CONTENTION_TIME: {
1412 jlong tid = obj.j;
1413 if (tid < 0) {
1414 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1415 }
1416
1417 // Look for the JavaThread of this given tid
1418 MutexLockerEx ml(Threads_lock);
1419 if (tid == 0) {
1420 // reset contention statistics for all threads if tid == 0
1421 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1422 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1423 ThreadService::reset_contention_count_stat(java_thread);
1424 } else {
1425 ThreadService::reset_contention_time_stat(java_thread);
1426 }
1427 }
1428 } else {
1429 // reset contention statistics for a given thread
1430 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(tid);
1431 if (java_thread == NULL) {
1432 return false;
1433 }
1434
1435 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1436 ThreadService::reset_contention_count_stat(java_thread);
1437 } else {
1438 ThreadService::reset_contention_time_stat(java_thread);
1439 }
1440 }
1441 return true;
1442 break;
1443 }
1444 case JMM_STAT_PEAK_POOL_USAGE: {
1445 jobject o = obj.l;
1446 if (o == NULL) {
1447 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1448 }
1449
1450 oop pool_obj = JNIHandles::resolve(o);
1451 assert(pool_obj->is_instance(), "Should be an instanceOop");
1452 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1453
1454 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1455 if (pool != NULL) {
1456 pool->reset_peak_memory_usage();
1457 return true;
1458 }
1459 break;
1460 }
1461 case JMM_STAT_GC_STAT: {
1462 jobject o = obj.l;
1463 if (o == NULL) {
1464 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1465 }
1466
1467 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1468 if (mgr != NULL) {
1469 mgr->reset_gc_stat();
1470 return true;
1471 }
1472 break;
1473 }
1474 default:
1475 assert(0, "Unknown Statistic Type");
1476 }
1477 return false;
1478 JVM_END
1479
1480 // Returns the fast estimate of CPU time consumed by
1481 // a given thread (in nanoseconds).
1482 // If thread_id == 0, return CPU time for the current thread.
1483 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1484 if (!os::is_thread_cpu_time_supported()) {
1485 return -1;
1486 }
1487
1488 if (thread_id < 0) {
1489 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1490 "Invalid thread ID", -1);
1491 }
1492
1493 JavaThread* java_thread = NULL;
1494 if (thread_id == 0) {
1495 // current thread
1496 return os::current_thread_cpu_time();
1497 } else {
1498 MutexLockerEx ml(Threads_lock);
1499 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
1500 if (java_thread != NULL) {
1501 return os::thread_cpu_time((Thread*) java_thread);
1502 }
1503 }
1504 return -1;
1505 JVM_END
1506
1507 // Returns a String array of all VM global flag names
1508 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1509 // last flag entry is always NULL, so subtract 1
1510 int nFlags = (int) Flag::numFlags - 1;
1511 // allocate a temp array
1512 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1513 nFlags, CHECK_0);
1514 objArrayHandle flags_ah(THREAD, r);
1515 int num_entries = 0;
1516 for (int i = 0; i < nFlags; i++) {
1517 Flag* flag = &Flag::flags[i];
1518 // Exclude notproduct and develop flags in product builds.
1519 if (flag->is_constant_in_binary()) {
1520 continue;
1521 }
1522 // Exclude the locked (experimental, diagnostic) flags
1523 if (flag->is_unlocked() || flag->is_unlocker()) {
1524 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0);
1525 flags_ah->obj_at_put(num_entries, s());
1526 num_entries++;
1527 }
1528 }
1529
1530 if (num_entries < nFlags) {
1531 // Return array of right length
1532 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1533 for(int i = 0; i < num_entries; i++) {
1534 res->obj_at_put(i, flags_ah->obj_at(i));
1535 }
1536 return (jobjectArray)JNIHandles::make_local(env, res);
1537 }
1538
1539 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1540 JVM_END
1541
1542 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1543 // can't be determined, true otherwise. If false is returned, then *global
1544 // will be incomplete and invalid.
1545 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1546 Handle flag_name;
1547 if (name() == NULL) {
1548 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false);
1549 } else {
1550 flag_name = name;
1551 }
1552 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1553
1554 if (flag->is_bool()) {
1555 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1556 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1557 } else if (flag->is_intx()) {
1558 global->value.j = (jlong)flag->get_intx();
1559 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1560 } else if (flag->is_uintx()) {
1561 global->value.j = (jlong)flag->get_uintx();
1562 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1563 } else if (flag->is_uint64_t()) {
1564 global->value.j = (jlong)flag->get_uint64_t();
1565 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1566 } else if (flag->is_double()) {
1567 global->value.d = (jdouble)flag->get_double();
1568 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE;
1569 } else if (flag->is_size_t()) {
1570 global->value.j = (jlong)flag->get_size_t();
1571 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1572 } else if (flag->is_ccstr()) {
1573 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1574 global->value.l = (jobject)JNIHandles::make_local(env, str());
1575 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1576 } else {
1577 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1578 return false;
1579 }
1580
1581 global->writeable = flag->is_writeable();
1582 global->external = flag->is_external();
1583 switch (flag->get_origin()) {
1584 case Flag::DEFAULT:
1585 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1586 break;
1587 case Flag::COMMAND_LINE:
1588 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1589 break;
1590 case Flag::ENVIRON_VAR:
1591 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1592 break;
1593 case Flag::CONFIG_FILE:
1594 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1595 break;
1596 case Flag::MANAGEMENT:
1597 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1598 break;
1599 case Flag::ERGONOMIC:
1600 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1601 break;
1602 case Flag::ATTACH_ON_DEMAND:
1603 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND;
1604 break;
1605 default:
1606 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1607 }
1608
1609 return true;
1610 }
1611
1612 // Fill globals array of count length with jmmVMGlobal entries
1613 // specified by names. If names == NULL, fill globals array
1614 // with all Flags. Return value is number of entries
1615 // created in globals.
1616 // If a Flag with a given name in an array element does not
1617 // exist, globals[i].name will be set to NULL.
1618 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1619 jobjectArray names,
1620 jmmVMGlobal *globals,
1621 jint count))
1622
1623
1624 if (globals == NULL) {
1625 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1626 }
1627
1628 ResourceMark rm(THREAD);
1629
1630 if (names != NULL) {
1631 // return the requested globals
1632 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1633 objArrayHandle names_ah(THREAD, ta);
1634 // Make sure we have a String array
1635 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1636 if (element_klass != SystemDictionary::String_klass()) {
1637 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1638 "Array element type is not String class", 0);
1639 }
1640
1641 int names_length = names_ah->length();
1642 int num_entries = 0;
1643 for (int i = 0; i < names_length && i < count; i++) {
1644 oop s = names_ah->obj_at(i);
1645 if (s == NULL) {
1646 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1647 }
1648
1649 Handle sh(THREAD, s);
1650 char* str = java_lang_String::as_utf8_string(s);
1651 Flag* flag = Flag::find_flag(str, strlen(str));
1652 if (flag != NULL &&
1653 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1654 num_entries++;
1655 } else {
1656 globals[i].name = NULL;
1657 }
1658 }
1659 return num_entries;
1660 } else {
1661 // return all globals if names == NULL
1662
1663 // last flag entry is always NULL, so subtract 1
1664 int nFlags = (int) Flag::numFlags - 1;
1665 Handle null_h;
1666 int num_entries = 0;
1667 for (int i = 0; i < nFlags && num_entries < count; i++) {
1668 Flag* flag = &Flag::flags[i];
1669 // Exclude notproduct and develop flags in product builds.
1670 if (flag->is_constant_in_binary()) {
1671 continue;
1672 }
1673 // Exclude the locked (diagnostic, experimental) flags
1674 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1675 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1676 num_entries++;
1677 }
1678 }
1679 return num_entries;
1680 }
1681 JVM_END
1682
1683 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1684 ResourceMark rm(THREAD);
1685
1686 oop fn = JNIHandles::resolve_external_guard(flag_name);
1687 if (fn == NULL) {
1688 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1689 "The flag name cannot be null.");
1690 }
1691 char* name = java_lang_String::as_utf8_string(fn);
1692
1693 FormatBuffer<80> err_msg("%s", "");
1694 int succeed = WriteableFlags::set_flag(name, new_value, Flag::MANAGEMENT, err_msg);
1695
1696 if (succeed != WriteableFlags::SUCCESS) {
1697 if (succeed == WriteableFlags::MISSING_VALUE) {
1698 // missing value causes NPE to be thrown
1699 THROW(vmSymbols::java_lang_NullPointerException());
1700 } else {
1701 // all the other errors are reported as IAE with the appropriate error message
1702 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1703 err_msg.buffer());
1704 }
1705 }
1706 assert(succeed == WriteableFlags::SUCCESS, "Setting flag should succeed");
1707 JVM_END
1708
1709 class ThreadTimesClosure: public ThreadClosure {
1710 private:
1711 objArrayHandle _names_strings;
1712 char **_names_chars;
1713 typeArrayHandle _times;
1714 int _names_len;
1715 int _times_len;
1716 int _count;
1717
1718 public:
1719 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1720 ~ThreadTimesClosure();
1721 virtual void do_thread(Thread* thread);
1722 void do_unlocked();
1723 int count() { return _count; }
1724 };
1725
1726 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1727 typeArrayHandle times) {
1728 assert(names() != NULL, "names was NULL");
1729 assert(times() != NULL, "times was NULL");
1730 _names_strings = names;
1731 _names_len = names->length();
1732 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1733 _times = times;
1734 _times_len = times->length();
1735 _count = 0;
1736 }
1737
1738 //
1739 // Called with Threads_lock held
1740 //
1741 void ThreadTimesClosure::do_thread(Thread* thread) {
1742 assert(thread != NULL, "thread was NULL");
1743
1744 // exclude externally visible JavaThreads
1745 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1746 return;
1747 }
1748
1749 if (_count >= _names_len || _count >= _times_len) {
1750 // skip if the result array is not big enough
1751 return;
1752 }
1753
1754 EXCEPTION_MARK;
1755 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1756
1757 assert(thread->name() != NULL, "All threads should have a name");
1758 _names_chars[_count] = os::strdup(thread->name());
1759 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1760 os::thread_cpu_time(thread) : -1);
1761 _count++;
1762 }
1763
1764 // Called without Threads_lock, we can allocate String objects.
1765 void ThreadTimesClosure::do_unlocked() {
1766
1767 EXCEPTION_MARK;
1768 for (int i = 0; i < _count; i++) {
1769 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1770 _names_strings->obj_at_put(i, s());
1771 }
1772 }
1773
1774 ThreadTimesClosure::~ThreadTimesClosure() {
1775 for (int i = 0; i < _count; i++) {
1776 os::free(_names_chars[i]);
1777 }
1778 FREE_C_HEAP_ARRAY(char *, _names_chars);
1779 }
1780
1781 // Fills names with VM internal thread names and times with the corresponding
1782 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1783 // If the element type of names is not String, an IllegalArgumentException is
1784 // thrown.
1785 // If an array is not large enough to hold all the entries, only the entries
1786 // that fit will be returned. Return value is the number of VM internal
1787 // threads entries.
1788 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1789 jobjectArray names,
1790 jlongArray times))
1791 if (names == NULL || times == NULL) {
1792 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1793 }
1794 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1795 objArrayHandle names_ah(THREAD, na);
1796
1797 // Make sure we have a String array
1798 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1799 if (element_klass != SystemDictionary::String_klass()) {
1800 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1801 "Array element type is not String class", 0);
1802 }
1803
1804 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1805 typeArrayHandle times_ah(THREAD, ta);
1806
1807 ThreadTimesClosure ttc(names_ah, times_ah);
1808 {
1809 MutexLockerEx ml(Threads_lock);
1810 Threads::threads_do(&ttc);
1811 }
1812 ttc.do_unlocked();
1813 return ttc.count();
1814 JVM_END
1815
1816 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1817 ResourceMark rm(THREAD);
1818
1819 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1820 VMThread::execute(&op);
1821
1822 DeadlockCycle* deadlocks = op.result();
1823 if (deadlocks == NULL) {
1824 // no deadlock found and return
1825 return Handle();
1826 }
1827
1828 int num_threads = 0;
1829 DeadlockCycle* cycle;
1830 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1831 num_threads += cycle->num_threads();
1832 }
1833
1834 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1835 objArrayHandle threads_ah(THREAD, r);
1836
1837 int index = 0;
1838 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1839 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1840 int len = deadlock_threads->length();
1841 for (int i = 0; i < len; i++) {
1842 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1843 index++;
1844 }
1845 }
1846 return threads_ah;
1847 }
1848
1849 // Finds cycles of threads that are deadlocked involved in object monitors
1850 // and JSR-166 synchronizers.
1851 // Returns an array of Thread objects which are in deadlock, if any.
1852 // Otherwise, returns NULL.
1853 //
1854 // Input parameter:
1855 // object_monitors_only - if true, only check object monitors
1856 //
1857 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1858 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
1859 return (jobjectArray) JNIHandles::make_local(env, result());
1860 JVM_END
1861
1862 // Finds cycles of threads that are deadlocked on monitor locks
1863 // Returns an array of Thread objects which are in deadlock, if any.
1864 // Otherwise, returns NULL.
1865 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1866 Handle result = find_deadlocks(true, CHECK_0);
1867 return (jobjectArray) JNIHandles::make_local(env, result());
1868 JVM_END
1869
1870 // Gets the information about GC extension attributes including
1871 // the name of the attribute, its type, and a short description.
1872 //
1873 // Input parameters:
1874 // mgr - GC memory manager
1875 // info - caller allocated array of jmmExtAttributeInfo
1876 // count - number of elements of the info array
1877 //
1878 // Returns the number of GC extension attributes filled in the info array; or
1879 // -1 if info is not big enough
1880 //
1881 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1882 // All GC memory managers have 1 attribute (number of GC threads)
1883 if (count == 0) {
1884 return 0;
1885 }
1886
1887 if (info == NULL) {
1888 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1889 }
1890
1891 info[0].name = "GcThreadCount";
1892 info[0].type = 'I';
1893 info[0].description = "Number of GC threads";
1894 return 1;
1895 JVM_END
1896
1897 // verify the given array is an array of java/lang/management/MemoryUsage objects
1898 // of a given length and return the objArrayOop
1899 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1900 if (array == NULL) {
1901 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1902 }
1903
1904 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1905 objArrayHandle array_h(THREAD, oa);
1906
1907 // array must be of the given length
1908 if (length != array_h->length()) {
1909 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1910 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
1911 }
1912
1913 // check if the element of array is of type MemoryUsage class
1914 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
1915 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1916 if (element_klass != usage_klass) {
1917 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1918 "The element type is not MemoryUsage class", 0);
1919 }
1920
1921 return array_h();
1922 }
1923
1924 // Gets the statistics of the last GC of a given GC memory manager.
1925 // Input parameters:
1926 // obj - GarbageCollectorMXBean object
1927 // gc_stat - caller allocated jmmGCStat where:
1928 // a. before_gc_usage - array of MemoryUsage objects
1929 // b. after_gc_usage - array of MemoryUsage objects
1930 // c. gc_ext_attributes_values_size is set to the
1931 // gc_ext_attribute_values array allocated
1932 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1933 //
1934 // On return,
1935 // gc_index == 0 indicates no GC statistics available
1936 //
1937 // before_gc_usage and after_gc_usage - filled with per memory pool
1938 // before and after GC usage in the same order as the memory pools
1939 // returned by GetMemoryPools for a given GC memory manager.
1940 // num_gc_ext_attributes indicates the number of elements in
1941 // the gc_ext_attribute_values array is filled; or
1942 // -1 if the gc_ext_attributes_values array is not big enough
1943 //
1944 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1945 ResourceMark rm(THREAD);
1946
1947 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
1948 THROW(vmSymbols::java_lang_NullPointerException());
1949 }
1950
1951 // Get the GCMemoryManager
1952 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1953
1954 // Make a copy of the last GC statistics
1955 // GC may occur while constructing the last GC information
1956 int num_pools = MemoryService::num_memory_pools();
1957 GCStatInfo stat(num_pools);
1958 if (mgr->get_last_gc_stat(&stat) == 0) {
1959 gc_stat->gc_index = 0;
1960 return;
1961 }
1962
1963 gc_stat->gc_index = stat.gc_index();
1964 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
1965 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
1966
1967 // Current implementation does not have GC extension attributes
1968 gc_stat->num_gc_ext_attributes = 0;
1969
1970 // Fill the arrays of MemoryUsage objects with before and after GC
1971 // per pool memory usage
1972 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
1973 num_pools,
1974 CHECK);
1975 objArrayHandle usage_before_gc_ah(THREAD, bu);
1976
1977 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
1978 num_pools,
1979 CHECK);
1980 objArrayHandle usage_after_gc_ah(THREAD, au);
1981
1982 for (int i = 0; i < num_pools; i++) {
1983 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
1984 Handle after_usage;
1985
1986 MemoryUsage u = stat.after_gc_usage_for_pool(i);
1987 if (u.max_size() == 0 && u.used() > 0) {
1988 // If max size == 0, this pool is a survivor space.
1989 // Set max size = -1 since the pools will be swapped after GC.
1990 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
1991 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
1992 } else {
1993 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
1994 }
1995 usage_before_gc_ah->obj_at_put(i, before_usage());
1996 usage_after_gc_ah->obj_at_put(i, after_usage());
1997 }
1998
1999 if (gc_stat->gc_ext_attribute_values_size > 0) {
2000 // Current implementation only has 1 attribute (number of GC threads)
2001 // The type is 'I'
2002 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2003 }
2004 JVM_END
2005
2006 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2007 ResourceMark rm(THREAD);
2008 // Get the GCMemoryManager
2009 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2010 mgr->set_notification_enabled(enabled?true:false);
2011 JVM_END
2012
2013 // Dump heap - Returns 0 if succeeds.
2014 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2015 #if INCLUDE_SERVICES
2016 ResourceMark rm(THREAD);
2017 oop on = JNIHandles::resolve_external_guard(outputfile);
2018 if (on == NULL) {
2019 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2020 "Output file name cannot be null.", -1);
2021 }
2022 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1));
2023 if (name == NULL) {
2024 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2025 "Output file name cannot be null.", -1);
2026 }
2027 HeapDumper dumper(live ? true : false);
2028 if (dumper.dump(name) != 0) {
2029 const char* errmsg = dumper.error_as_C_string();
2030 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2031 }
2032 return 0;
2033 #else // INCLUDE_SERVICES
2034 return -1;
2035 #endif // INCLUDE_SERVICES
2036 JVM_END
2037
2038 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2039 ResourceMark rm(THREAD);
2040 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2041 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2042 dcmd_list->length(), CHECK_NULL);
2043 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2044 for (int i = 0; i < dcmd_list->length(); i++) {
2045 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2046 cmd_array->obj_at_put(i, cmd_name);
2047 }
2048 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2049 JVM_END
2050
2051 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2052 dcmdInfo* infoArray))
2053 if (cmds == NULL || infoArray == NULL) {
2054 THROW(vmSymbols::java_lang_NullPointerException());
2055 }
2056
2057 ResourceMark rm(THREAD);
2058
2059 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2060 objArrayHandle cmds_ah(THREAD, ca);
2061
2062 // Make sure we have a String array
2063 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2064 if (element_klass != SystemDictionary::String_klass()) {
2065 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2066 "Array element type is not String class");
2067 }
2068
2069 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2070
2071 int num_cmds = cmds_ah->length();
2072 for (int i = 0; i < num_cmds; i++) {
2073 oop cmd = cmds_ah->obj_at(i);
2074 if (cmd == NULL) {
2075 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2076 "Command name cannot be null.");
2077 }
2078 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2079 if (cmd_name == NULL) {
2080 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2081 "Command name cannot be null.");
2082 }
2083 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2084 if (pos == -1) {
2085 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2086 "Unknown diagnostic command");
2087 }
2088 DCmdInfo* info = info_list->at(pos);
2089 infoArray[i].name = info->name();
2090 infoArray[i].description = info->description();
2091 infoArray[i].impact = info->impact();
2092 JavaPermission p = info->permission();
2093 infoArray[i].permission_class = p._class;
2094 infoArray[i].permission_name = p._name;
2095 infoArray[i].permission_action = p._action;
2096 infoArray[i].num_arguments = info->num_arguments();
2097 infoArray[i].enabled = info->is_enabled();
2098 }
2099 JVM_END
2100
2101 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2102 jstring command, dcmdArgInfo* infoArray))
2103 ResourceMark rm(THREAD);
2104 oop cmd = JNIHandles::resolve_external_guard(command);
2105 if (cmd == NULL) {
2106 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2107 "Command line cannot be null.");
2108 }
2109 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2110 if (cmd_name == NULL) {
2111 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2112 "Command line content cannot be null.");
2113 }
2114 DCmd* dcmd = NULL;
2115 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2116 strlen(cmd_name));
2117 if (factory != NULL) {
2118 dcmd = factory->create_resource_instance(NULL);
2119 }
2120 if (dcmd == NULL) {
2121 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2122 "Unknown diagnostic command");
2123 }
2124 DCmdMark mark(dcmd);
2125 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2126 if (array->length() == 0) {
2127 return;
2128 }
2129 for (int i = 0; i < array->length(); i++) {
2130 infoArray[i].name = array->at(i)->name();
2131 infoArray[i].description = array->at(i)->description();
2132 infoArray[i].type = array->at(i)->type();
2133 infoArray[i].default_string = array->at(i)->default_string();
2134 infoArray[i].mandatory = array->at(i)->is_mandatory();
2135 infoArray[i].option = array->at(i)->is_option();
2136 infoArray[i].multiple = array->at(i)->is_multiple();
2137 infoArray[i].position = array->at(i)->position();
2138 }
2139 return;
2140 JVM_END
2141
2142 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2143 ResourceMark rm(THREAD);
2144 oop cmd = JNIHandles::resolve_external_guard(commandline);
2145 if (cmd == NULL) {
2146 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2147 "Command line cannot be null.");
2148 }
2149 char* cmdline = java_lang_String::as_utf8_string(cmd);
2150 if (cmdline == NULL) {
2151 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2152 "Command line content cannot be null.");
2153 }
2154 bufferedStream output;
2155 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2156 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2157 return (jstring) JNIHandles::make_local(env, result);
2158 JVM_END
2159
2160 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2161 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2162 JVM_END
2163
2164 jlong Management::ticks_to_ms(jlong ticks) {
2165 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2166 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2167 * (double)1000.0);
2168 }
2169 #endif // INCLUDE_MANAGEMENT
2170
2171 // Gets an array containing the amount of memory allocated on the Java
2172 // heap for a set of threads (in bytes). Each element of the array is
2173 // the amount of memory allocated for the thread ID specified in the
2174 // corresponding entry in the given array of thread IDs; or -1 if the
2175 // thread does not exist or has terminated.
2176 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2177 jlongArray sizeArray))
2178 // Check if threads is null
2179 if (ids == NULL || sizeArray == NULL) {
2180 THROW(vmSymbols::java_lang_NullPointerException());
2181 }
2182
2183 ResourceMark rm(THREAD);
2184 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2185 typeArrayHandle ids_ah(THREAD, ta);
2186
2187 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2188 typeArrayHandle sizeArray_h(THREAD, sa);
2189
2190 // validate the thread id array
2191 validate_thread_id_array(ids_ah, CHECK);
2192
2193 // sizeArray must be of the same length as the given array of thread IDs
2194 int num_threads = ids_ah->length();
2195 if (num_threads != sizeArray_h->length()) {
2196 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2197 "The length of the given long array does not match the length of "
2198 "the given array of thread IDs");
2199 }
2200
2201 MutexLockerEx ml(Threads_lock);
2202 for (int i = 0; i < num_threads; i++) {
2203 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2204 if (java_thread != NULL) {
2205 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2206 }
2207 }
2208 JVM_END
2209
2210 // Returns the CPU time consumed by a given thread (in nanoseconds).
2211 // If thread_id == 0, CPU time for the current thread is returned.
2212 // If user_sys_cpu_time = true, user level and system CPU time of
2213 // a given thread is returned; otherwise, only user level CPU time
2214 // is returned.
2215 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2216 if (!os::is_thread_cpu_time_supported()) {
2217 return -1;
2218 }
2219
2220 if (thread_id < 0) {
2221 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2222 "Invalid thread ID", -1);
2223 }
2224
2225 JavaThread* java_thread = NULL;
2226 if (thread_id == 0) {
2227 // current thread
2228 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2229 } else {
2230 MutexLockerEx ml(Threads_lock);
2231 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
2232 if (java_thread != NULL) {
2233 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2234 }
2235 }
2236 return -1;
2237 JVM_END
2238
2239 // Gets an array containing the CPU times consumed by a set of threads
2240 // (in nanoseconds). Each element of the array is the CPU time for the
2241 // thread ID specified in the corresponding entry in the given array
2242 // of thread IDs; or -1 if the thread does not exist or has terminated.
2243 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2244 // for the given thread is returned; otherwise, only user level CPU time
2245 // is returned.
2246 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2247 jlongArray timeArray,
2248 jboolean user_sys_cpu_time))
2249 // Check if threads is null
2250 if (ids == NULL || timeArray == NULL) {
2251 THROW(vmSymbols::java_lang_NullPointerException());
2252 }
2253
2254 ResourceMark rm(THREAD);
2255 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2256 typeArrayHandle ids_ah(THREAD, ta);
2257
2258 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2259 typeArrayHandle timeArray_h(THREAD, tia);
2260
2261 // validate the thread id array
2262 validate_thread_id_array(ids_ah, CHECK);
2263
2264 // timeArray must be of the same length as the given array of thread IDs
2265 int num_threads = ids_ah->length();
2266 if (num_threads != timeArray_h->length()) {
2267 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2268 "The length of the given long array does not match the length of "
2269 "the given array of thread IDs");
2270 }
2271
2272 MutexLockerEx ml(Threads_lock);
2273 for (int i = 0; i < num_threads; i++) {
2274 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2275 if (java_thread != NULL) {
2276 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2277 user_sys_cpu_time != 0));
2278 }
2279 }
2280 JVM_END
2281
2282
2283
2284 #if INCLUDE_MANAGEMENT
2285 const struct jmmInterface_1_ jmm_interface = {
2286 NULL,
2287 NULL,
2288 jmm_GetVersion,
2289 jmm_GetOptionalSupport,
2290 jmm_GetInputArguments,
2291 jmm_GetThreadInfo,
2292 jmm_GetInputArgumentArray,
2293 jmm_GetMemoryPools,
2294 jmm_GetMemoryManagers,
2295 jmm_GetMemoryPoolUsage,
2296 jmm_GetPeakMemoryPoolUsage,
2297 jmm_GetThreadAllocatedMemory,
2298 jmm_GetMemoryUsage,
2299 jmm_GetLongAttribute,
2300 jmm_GetBoolAttribute,
2301 jmm_SetBoolAttribute,
2302 jmm_GetLongAttributes,
2303 jmm_FindMonitorDeadlockedThreads,
2304 jmm_GetThreadCpuTime,
2305 jmm_GetVMGlobalNames,
2306 jmm_GetVMGlobals,
2307 jmm_GetInternalThreadTimes,
2308 jmm_ResetStatistic,
2309 jmm_SetPoolSensor,
2310 jmm_SetPoolThreshold,
2311 jmm_GetPoolCollectionUsage,
2312 jmm_GetGCExtAttributeInfo,
2313 jmm_GetLastGCStat,
2314 jmm_GetThreadCpuTimeWithKind,
2315 jmm_GetThreadCpuTimesWithKind,
2316 jmm_DumpHeap0,
2317 jmm_FindDeadlockedThreads,
2318 jmm_SetVMGlobal,
2319 NULL,
2320 jmm_DumpThreads,
2321 jmm_SetGCNotificationEnabled,
2322 jmm_GetDiagnosticCommands,
2323 jmm_GetDiagnosticCommandInfo,
2324 jmm_GetDiagnosticCommandArgumentsInfo,
2325 jmm_ExecuteDiagnosticCommand,
2326 jmm_SetDiagnosticFrameworkNotificationEnabled
2327 };
2328 #endif // INCLUDE_MANAGEMENT
2329
2330 void* Management::get_jmm_interface(int version) {
2331 #if INCLUDE_MANAGEMENT
2332 if (version == JMM_VERSION_1_0) {
2333 return (void*) &jmm_interface;
2334 }
2335 #endif // INCLUDE_MANAGEMENT
2336 return NULL;
2337 }