1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "compiler/compileBroker.hpp"
28 #include "memory/iterator.hpp"
29 #include "memory/oopFactory.hpp"
30 #include "memory/resourceArea.hpp"
31 #include "oops/klass.hpp"
32 #include "oops/objArrayKlass.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/arguments.hpp"
35 #include "runtime/globals.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "runtime/interfaceSupport.hpp"
38 #include "runtime/javaCalls.hpp"
39 #include "runtime/jniHandles.hpp"
40 #include "runtime/os.hpp"
41 #include "runtime/serviceThread.hpp"
42 #include "services/classLoadingService.hpp"
43 #include "services/diagnosticCommand.hpp"
44 #include "services/diagnosticFramework.hpp"
45 #include "services/heapDumper.hpp"
46 #include "services/jmm.h"
47 #include "services/lowMemoryDetector.hpp"
48 #include "services/gcNotifier.hpp"
49 #include "services/management.hpp"
50 #include "services/memoryManager.hpp"
51 #include "services/memoryPool.hpp"
52 #include "services/memoryService.hpp"
53 #include "services/runtimeService.hpp"
54 #include "services/threadService.hpp"
55
56 PerfVariable* Management::_begin_vm_creation_time = NULL;
57 PerfVariable* Management::_end_vm_creation_time = NULL;
58 PerfVariable* Management::_vm_init_done_time = NULL;
59
60 Klass* Management::_sensor_klass = NULL;
61 Klass* Management::_threadInfo_klass = NULL;
62 Klass* Management::_memoryUsage_klass = NULL;
63 Klass* Management::_memoryPoolMXBean_klass = NULL;
64 Klass* Management::_memoryManagerMXBean_klass = NULL;
65 Klass* Management::_garbageCollectorMXBean_klass = NULL;
66 Klass* Management::_managementFactory_klass = NULL;
67 Klass* Management::_garbageCollectorImpl_klass = NULL;
68 Klass* Management::_gcInfo_klass = NULL;
69 Klass* Management::_diagnosticCommandImpl_klass = NULL;
70 Klass* Management::_managementFactoryHelper_klass = NULL;
71
72
73 jmmOptionalSupport Management::_optional_support = {0};
74 TimeStamp Management::_stamp;
75
76 void management_init() {
77 #if INCLUDE_MANAGEMENT
78 Management::init();
79 ThreadService::init();
80 RuntimeService::init();
81 ClassLoadingService::init();
82 #else
83 ThreadService::init();
84 // Make sure the VM version is initialized
85 // This is normally called by RuntimeService::init().
86 // Since that is conditionalized out, we need to call it here.
87 Abstract_VM_Version::initialize();
88 #endif // INCLUDE_MANAGEMENT
89 }
90
91 #if INCLUDE_MANAGEMENT
92
93 void Management::init() {
94 EXCEPTION_MARK;
95
96 // These counters are for java.lang.management API support.
97 // They are created even if -XX:-UsePerfData is set and in
98 // that case, they will be allocated on C heap.
99
100 _begin_vm_creation_time =
101 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
102 PerfData::U_None, CHECK);
103
104 _end_vm_creation_time =
105 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
106 PerfData::U_None, CHECK);
107
108 _vm_init_done_time =
109 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
110 PerfData::U_None, CHECK);
111
112 // Initialize optional support
113 _optional_support.isLowMemoryDetectionSupported = 1;
114 _optional_support.isCompilationTimeMonitoringSupported = 1;
115 _optional_support.isThreadContentionMonitoringSupported = 1;
116
117 if (os::is_thread_cpu_time_supported()) {
118 _optional_support.isCurrentThreadCpuTimeSupported = 1;
119 _optional_support.isOtherThreadCpuTimeSupported = 1;
120 } else {
121 _optional_support.isCurrentThreadCpuTimeSupported = 0;
122 _optional_support.isOtherThreadCpuTimeSupported = 0;
123 }
124
125 _optional_support.isBootClassPathSupported = 1;
126 _optional_support.isObjectMonitorUsageSupported = 1;
127 #if INCLUDE_SERVICES
128 // This depends on the heap inspector
129 _optional_support.isSynchronizerUsageSupported = 1;
130 #endif // INCLUDE_SERVICES
131 _optional_support.isThreadAllocatedMemorySupported = 1;
132 _optional_support.isRemoteDiagnosticCommandsSupported = 1;
133
134 // Registration of the diagnostic commands
135 DCmdRegistrant::register_dcmds();
136 DCmdRegistrant::register_dcmds_ext();
137 }
138
139 void Management::initialize(TRAPS) {
140 // Start the service thread
141 ServiceThread::initialize();
142
143 if (ManagementServer) {
144 ResourceMark rm(THREAD);
145 HandleMark hm(THREAD);
146
147 // Load and initialize the sun.management.Agent class
148 // invoke startAgent method to start the management server
149 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
150 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(),
151 loader,
152 Handle(),
153 true,
154 CHECK);
155 instanceKlassHandle ik (THREAD, k);
156
157 JavaValue result(T_VOID);
158 JavaCalls::call_static(&result,
159 ik,
160 vmSymbols::startAgent_name(),
161 vmSymbols::void_method_signature(),
162 CHECK);
163 }
164 }
165
166 void Management::get_optional_support(jmmOptionalSupport* support) {
167 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
168 }
169
170 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
171 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
172 instanceKlassHandle ik (THREAD, k);
173 if (ik->should_be_initialized()) {
174 ik->initialize(CHECK_NULL);
175 }
176 // If these classes change to not be owned by the boot loader, they need
177 // to be walked to keep their class loader alive in oops_do.
178 assert(ik->class_loader() == NULL, "need to follow in oops_do");
179 return ik();
180 }
181
182 void Management::record_vm_startup_time(jlong begin, jlong duration) {
183 // if the performance counter is not initialized,
184 // then vm initialization failed; simply return.
185 if (_begin_vm_creation_time == NULL) return;
186
187 _begin_vm_creation_time->set_value(begin);
188 _end_vm_creation_time->set_value(begin + duration);
189 PerfMemory::set_accessible(true);
190 }
191
192 jlong Management::timestamp() {
193 TimeStamp t;
194 t.update();
195 return t.ticks() - _stamp.ticks();
196 }
197
198 void Management::oops_do(OopClosure* f) {
199 MemoryService::oops_do(f);
200 ThreadService::oops_do(f);
201 }
202
203 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
204 if (_threadInfo_klass == NULL) {
205 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
206 }
207 return _threadInfo_klass;
208 }
209
210 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
211 if (_memoryUsage_klass == NULL) {
212 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
213 }
214 return _memoryUsage_klass;
215 }
216
217 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
218 if (_memoryPoolMXBean_klass == NULL) {
219 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
220 }
221 return _memoryPoolMXBean_klass;
222 }
223
224 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
225 if (_memoryManagerMXBean_klass == NULL) {
226 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
227 }
228 return _memoryManagerMXBean_klass;
229 }
230
231 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
232 if (_garbageCollectorMXBean_klass == NULL) {
233 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
234 }
235 return _garbageCollectorMXBean_klass;
236 }
237
238 Klass* Management::sun_management_Sensor_klass(TRAPS) {
239 if (_sensor_klass == NULL) {
240 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
241 }
242 return _sensor_klass;
243 }
244
245 Klass* Management::sun_management_ManagementFactory_klass(TRAPS) {
246 if (_managementFactory_klass == NULL) {
247 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL);
248 }
249 return _managementFactory_klass;
250 }
251
252 Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) {
253 if (_garbageCollectorImpl_klass == NULL) {
254 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL);
255 }
256 return _garbageCollectorImpl_klass;
257 }
258
259 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) {
260 if (_gcInfo_klass == NULL) {
261 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
262 }
263 return _gcInfo_klass;
264 }
265
266 Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) {
267 if (_diagnosticCommandImpl_klass == NULL) {
268 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL);
269 }
270 return _diagnosticCommandImpl_klass;
271 }
272
273 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
274 if (_managementFactoryHelper_klass == NULL) {
275 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
276 }
277 return _managementFactoryHelper_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 // Helper functions
385 static JavaThread* find_java_thread_from_id(jlong thread_id) {
386 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
387
388 JavaThread* java_thread = NULL;
389 // Sequential search for now. Need to do better optimization later.
390 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) {
391 oop tobj = thread->threadObj();
392 if (!thread->is_exiting() &&
393 tobj != NULL &&
394 thread_id == java_lang_Thread::thread_id(tobj)) {
395 java_thread = thread;
396 break;
397 }
398 }
399 return java_thread;
400 }
401
402 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
403 if (mgr == NULL) {
404 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
405 }
406 oop mgr_obj = JNIHandles::resolve(mgr);
407 instanceHandle h(THREAD, (instanceOop) mgr_obj);
408
409 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
410 if (!h->is_a(k)) {
411 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
412 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
413 NULL);
414 }
415
416 MemoryManager* gc = MemoryService::get_memory_manager(h);
417 if (gc == NULL || !gc->is_gc_memory_manager()) {
418 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
419 "Invalid GC memory manager",
420 NULL);
421 }
422 return (GCMemoryManager*) gc;
423 }
424
425 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
426 if (obj == NULL) {
427 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
428 }
429
430 oop pool_obj = JNIHandles::resolve(obj);
431 assert(pool_obj->is_instance(), "Should be an instanceOop");
432 instanceHandle ph(THREAD, (instanceOop) pool_obj);
433
434 return MemoryService::get_memory_pool(ph);
435 }
436
437 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
438 int num_threads = ids_ah->length();
439
440 // Validate input thread IDs
441 int i = 0;
442 for (i = 0; i < num_threads; i++) {
443 jlong tid = ids_ah->long_at(i);
444 if (tid <= 0) {
445 // throw exception if invalid thread id.
446 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
447 "Invalid thread ID entry");
448 }
449 }
450 }
451
452 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
453 // check if the element of infoArray is of type ThreadInfo class
454 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
455 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
456 if (element_klass != threadinfo_klass) {
457 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
458 "infoArray element type is not ThreadInfo class");
459 }
460 }
461
462
463 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
464 if (obj == NULL) {
465 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
466 }
467
468 oop mgr_obj = JNIHandles::resolve(obj);
469 assert(mgr_obj->is_instance(), "Should be an instanceOop");
470 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
471
472 return MemoryService::get_memory_manager(mh);
473 }
474
475 // Returns a version string and sets major and minor version if
476 // the input parameters are non-null.
477 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
478 return JMM_VERSION;
479 JVM_END
480
481 // Gets the list of VM monitoring and management optional supports
482 // Returns 0 if succeeded; otherwise returns non-zero.
483 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
484 if (support == NULL) {
485 return -1;
486 }
487 Management::get_optional_support(support);
488 return 0;
489 JVM_END
490
491 // Returns a java.lang.String object containing the input arguments to the VM.
492 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
493 ResourceMark rm(THREAD);
494
495 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
496 return NULL;
497 }
498
499 char** vm_flags = Arguments::jvm_flags_array();
500 char** vm_args = Arguments::jvm_args_array();
501 int num_flags = Arguments::num_jvm_flags();
502 int num_args = Arguments::num_jvm_args();
503
504 size_t length = 1; // null terminator
505 int i;
506 for (i = 0; i < num_flags; i++) {
507 length += strlen(vm_flags[i]);
508 }
509 for (i = 0; i < num_args; i++) {
510 length += strlen(vm_args[i]);
511 }
512 // add a space between each argument
513 length += num_flags + num_args - 1;
514
515 // Return the list of input arguments passed to the VM
516 // and preserve the order that the VM processes.
517 char* args = NEW_RESOURCE_ARRAY(char, length);
518 args[0] = '\0';
519 // concatenate all jvm_flags
520 if (num_flags > 0) {
521 strcat(args, vm_flags[0]);
522 for (i = 1; i < num_flags; i++) {
523 strcat(args, " ");
524 strcat(args, vm_flags[i]);
525 }
526 }
527
528 if (num_args > 0 && num_flags > 0) {
529 // append a space if args already contains one or more jvm_flags
530 strcat(args, " ");
531 }
532
533 // concatenate all jvm_args
534 if (num_args > 0) {
535 strcat(args, vm_args[0]);
536 for (i = 1; i < num_args; i++) {
537 strcat(args, " ");
538 strcat(args, vm_args[i]);
539 }
540 }
541
542 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
543 return JNIHandles::make_local(env, hargs());
544 JVM_END
545
546 // Returns an array of java.lang.String object containing the input arguments to the VM.
547 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
548 ResourceMark rm(THREAD);
549
550 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
551 return NULL;
552 }
553
554 char** vm_flags = Arguments::jvm_flags_array();
555 char** vm_args = Arguments::jvm_args_array();
556 int num_flags = Arguments::num_jvm_flags();
557 int num_args = Arguments::num_jvm_args();
558
559 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass());
560 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
561 objArrayHandle result_h(THREAD, r);
562
563 int index = 0;
564 for (int j = 0; j < num_flags; j++, index++) {
565 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
566 result_h->obj_at_put(index, h());
567 }
568 for (int i = 0; i < num_args; i++, index++) {
569 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
570 result_h->obj_at_put(index, h());
571 }
572 return (jobjectArray) JNIHandles::make_local(env, result_h());
573 JVM_END
574
575 // Returns an array of java/lang/management/MemoryPoolMXBean object
576 // one for each memory pool if obj == null; otherwise returns
577 // an array of memory pools for a given memory manager if
578 // it is a valid memory manager.
579 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
580 ResourceMark rm(THREAD);
581
582 int num_memory_pools;
583 MemoryManager* mgr = NULL;
584 if (obj == NULL) {
585 num_memory_pools = MemoryService::num_memory_pools();
586 } else {
587 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
588 if (mgr == NULL) {
589 return NULL;
590 }
591 num_memory_pools = mgr->num_memory_pools();
592 }
593
594 // Allocate the resulting MemoryPoolMXBean[] object
595 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
596 instanceKlassHandle ik (THREAD, k);
597 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
598 objArrayHandle poolArray(THREAD, r);
599
600 if (mgr == NULL) {
601 // Get all memory pools
602 for (int i = 0; i < num_memory_pools; i++) {
603 MemoryPool* pool = MemoryService::get_memory_pool(i);
604 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
605 instanceHandle ph(THREAD, p);
606 poolArray->obj_at_put(i, ph());
607 }
608 } else {
609 // Get memory pools managed by a given memory manager
610 for (int i = 0; i < num_memory_pools; i++) {
611 MemoryPool* pool = mgr->get_memory_pool(i);
612 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
613 instanceHandle ph(THREAD, p);
614 poolArray->obj_at_put(i, ph());
615 }
616 }
617 return (jobjectArray) JNIHandles::make_local(env, poolArray());
618 JVM_END
619
620 // Returns an array of java/lang/management/MemoryManagerMXBean object
621 // one for each memory manager if obj == null; otherwise returns
622 // an array of memory managers for a given memory pool if
623 // it is a valid memory pool.
624 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
625 ResourceMark rm(THREAD);
626
627 int num_mgrs;
628 MemoryPool* pool = NULL;
629 if (obj == NULL) {
630 num_mgrs = MemoryService::num_memory_managers();
631 } else {
632 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
633 if (pool == NULL) {
634 return NULL;
635 }
636 num_mgrs = pool->num_memory_managers();
637 }
638
639 // Allocate the resulting MemoryManagerMXBean[] object
640 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
641 instanceKlassHandle ik (THREAD, k);
642 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
643 objArrayHandle mgrArray(THREAD, r);
644
645 if (pool == NULL) {
646 // Get all memory managers
647 for (int i = 0; i < num_mgrs; i++) {
648 MemoryManager* mgr = MemoryService::get_memory_manager(i);
649 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
650 instanceHandle ph(THREAD, p);
651 mgrArray->obj_at_put(i, ph());
652 }
653 } else {
654 // Get memory managers for a given memory pool
655 for (int i = 0; i < num_mgrs; i++) {
656 MemoryManager* mgr = pool->get_memory_manager(i);
657 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
658 instanceHandle ph(THREAD, p);
659 mgrArray->obj_at_put(i, ph());
660 }
661 }
662 return (jobjectArray) JNIHandles::make_local(env, mgrArray());
663 JVM_END
664
665
666 // Returns a java/lang/management/MemoryUsage object containing the memory usage
667 // of a given memory pool.
668 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
669 ResourceMark rm(THREAD);
670
671 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
672 if (pool != NULL) {
673 MemoryUsage usage = pool->get_memory_usage();
674 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
675 return JNIHandles::make_local(env, h());
676 } else {
677 return NULL;
678 }
679 JVM_END
680
681 // Returns a java/lang/management/MemoryUsage object containing the memory usage
682 // of a given memory pool.
683 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
684 ResourceMark rm(THREAD);
685
686 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
687 if (pool != NULL) {
688 MemoryUsage usage = pool->get_peak_memory_usage();
689 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
690 return JNIHandles::make_local(env, h());
691 } else {
692 return NULL;
693 }
694 JVM_END
695
696 // Returns a java/lang/management/MemoryUsage object containing the memory usage
697 // of a given memory pool after most recent GC.
698 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
699 ResourceMark rm(THREAD);
700
701 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
702 if (pool != NULL && pool->is_collected_pool()) {
703 MemoryUsage usage = pool->get_last_collection_usage();
704 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
705 return JNIHandles::make_local(env, h());
706 } else {
707 return NULL;
708 }
709 JVM_END
710
711 // Sets the memory pool sensor for a threshold type
712 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
713 if (obj == NULL || sensorObj == NULL) {
714 THROW(vmSymbols::java_lang_NullPointerException());
715 }
716
717 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
718 oop s = JNIHandles::resolve(sensorObj);
719 assert(s->is_instance(), "Sensor should be an instanceOop");
720 instanceHandle sensor_h(THREAD, (instanceOop) s);
721 if (!sensor_h->is_a(sensor_klass)) {
722 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
723 "Sensor is not an instance of sun.management.Sensor class");
724 }
725
726 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
727 assert(mpool != NULL, "MemoryPool should exist");
728
729 switch (type) {
730 case JMM_USAGE_THRESHOLD_HIGH:
731 case JMM_USAGE_THRESHOLD_LOW:
732 // have only one sensor for threshold high and low
733 mpool->set_usage_sensor_obj(sensor_h);
734 break;
735 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
736 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
737 // have only one sensor for threshold high and low
738 mpool->set_gc_usage_sensor_obj(sensor_h);
739 break;
740 default:
741 assert(false, "Unrecognized type");
742 }
743
744 JVM_END
745
746
747 // Sets the threshold of a given memory pool.
748 // Returns the previous threshold.
749 //
750 // Input parameters:
751 // pool - the MemoryPoolMXBean object
752 // type - threshold type
753 // threshold - the new threshold (must not be negative)
754 //
755 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
756 if (threshold < 0) {
757 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
758 "Invalid threshold value",
759 -1);
760 }
761
762 if ((size_t)threshold > max_uintx) {
763 stringStream st;
764 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx);
765 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
766 }
767
768 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
769 assert(pool != NULL, "MemoryPool should exist");
770
771 jlong prev = 0;
772 switch (type) {
773 case JMM_USAGE_THRESHOLD_HIGH:
774 if (!pool->usage_threshold()->is_high_threshold_supported()) {
775 return -1;
776 }
777 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
778 break;
779
780 case JMM_USAGE_THRESHOLD_LOW:
781 if (!pool->usage_threshold()->is_low_threshold_supported()) {
782 return -1;
783 }
784 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
785 break;
786
787 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
788 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
789 return -1;
790 }
791 // return and the new threshold is effective for the next GC
792 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
793
794 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
795 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
796 return -1;
797 }
798 // return and the new threshold is effective for the next GC
799 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
800
801 default:
802 assert(false, "Unrecognized type");
803 return -1;
804 }
805
806 // When the threshold is changed, reevaluate if the low memory
807 // detection is enabled.
808 if (prev != threshold) {
809 LowMemoryDetector::recompute_enabled_for_collected_pools();
810 LowMemoryDetector::detect_low_memory(pool);
811 }
812 return prev;
813 JVM_END
814
815 // Gets an array containing the amount of memory allocated on the Java
816 // heap for a set of threads (in bytes). Each element of the array is
817 // the amount of memory allocated for the thread ID specified in the
818 // corresponding entry in the given array of thread IDs; or -1 if the
819 // thread does not exist or has terminated.
820 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
821 jlongArray sizeArray))
822 // Check if threads is null
823 if (ids == NULL || sizeArray == NULL) {
824 THROW(vmSymbols::java_lang_NullPointerException());
825 }
826
827 ResourceMark rm(THREAD);
828 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
829 typeArrayHandle ids_ah(THREAD, ta);
830
831 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
832 typeArrayHandle sizeArray_h(THREAD, sa);
833
834 // validate the thread id array
835 validate_thread_id_array(ids_ah, CHECK);
836
837 // sizeArray must be of the same length as the given array of thread IDs
838 int num_threads = ids_ah->length();
839 if (num_threads != sizeArray_h->length()) {
840 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
841 "The length of the given long array does not match the length of "
842 "the given array of thread IDs");
843 }
844
845 MutexLockerEx ml(Threads_lock);
846 for (int i = 0; i < num_threads; i++) {
847 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i));
848 if (java_thread != NULL) {
849 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
850 }
851 }
852 JVM_END
853
854 // Returns a java/lang/management/MemoryUsage object representing
855 // the memory usage for the heap or non-heap memory.
856 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
857 ResourceMark rm(THREAD);
858
859 // Calculate the memory usage
860 size_t total_init = 0;
861 size_t total_used = 0;
862 size_t total_committed = 0;
863 size_t total_max = 0;
864 bool has_undefined_init_size = false;
865 bool has_undefined_max_size = false;
866
867 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
868 MemoryPool* pool = MemoryService::get_memory_pool(i);
869 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
870 MemoryUsage u = pool->get_memory_usage();
871 total_used += u.used();
872 total_committed += u.committed();
873
874 // if any one of the memory pool has undefined init_size or max_size,
875 // set it to -1
876 if (u.init_size() == (size_t)-1) {
877 has_undefined_init_size = true;
878 }
879 if (!has_undefined_init_size) {
880 total_init += u.init_size();
881 }
882
883 if (u.max_size() == (size_t)-1) {
884 has_undefined_max_size = true;
885 }
886 if (!has_undefined_max_size) {
887 total_max += u.max_size();
888 }
889 }
890 }
891
892 // In our current implementation, we make sure that all non-heap
893 // pools have defined init and max sizes. Heap pools do not matter,
894 // as we never use total_init and total_max for them.
895 assert(heap || !has_undefined_init_size, "Undefined init size");
896 assert(heap || !has_undefined_max_size, "Undefined max size");
897
898 MemoryUsage usage((heap ? InitialHeapSize : total_init),
899 total_used,
900 total_committed,
901 (heap ? Universe::heap()->max_capacity() : total_max));
902
903 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
904 return JNIHandles::make_local(env, obj());
905 JVM_END
906
907 // Returns the boolean value of a given attribute.
908 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
909 switch (att) {
910 case JMM_VERBOSE_GC:
911 return MemoryService::get_verbose();
912 case JMM_VERBOSE_CLASS:
913 return ClassLoadingService::get_verbose();
914 case JMM_THREAD_CONTENTION_MONITORING:
915 return ThreadService::is_thread_monitoring_contention();
916 case JMM_THREAD_CPU_TIME:
917 return ThreadService::is_thread_cpu_time_enabled();
918 case JMM_THREAD_ALLOCATED_MEMORY:
919 return ThreadService::is_thread_allocated_memory_enabled();
920 default:
921 assert(0, "Unrecognized attribute");
922 return false;
923 }
924 JVM_END
925
926 // Sets the given boolean attribute and returns the previous value.
927 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
928 switch (att) {
929 case JMM_VERBOSE_GC:
930 return MemoryService::set_verbose(flag != 0);
931 case JMM_VERBOSE_CLASS:
932 return ClassLoadingService::set_verbose(flag != 0);
933 case JMM_THREAD_CONTENTION_MONITORING:
934 return ThreadService::set_thread_monitoring_contention(flag != 0);
935 case JMM_THREAD_CPU_TIME:
936 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
937 case JMM_THREAD_ALLOCATED_MEMORY:
938 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
939 default:
940 assert(0, "Unrecognized attribute");
941 return false;
942 }
943 JVM_END
944
945
946 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
947 switch (att) {
948 case JMM_GC_TIME_MS:
949 return mgr->gc_time_ms();
950
951 case JMM_GC_COUNT:
952 return mgr->gc_count();
953
954 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
955 // current implementation only has 1 ext attribute
956 return 1;
957
958 default:
959 assert(0, "Unrecognized GC attribute");
960 return -1;
961 }
962 }
963
964 class VmThreadCountClosure: public ThreadClosure {
965 private:
966 int _count;
967 public:
968 VmThreadCountClosure() : _count(0) {};
969 void do_thread(Thread* thread);
970 int count() { return _count; }
971 };
972
973 void VmThreadCountClosure::do_thread(Thread* thread) {
974 // exclude externally visible JavaThreads
975 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
976 return;
977 }
978
979 _count++;
980 }
981
982 static jint get_vm_thread_count() {
983 VmThreadCountClosure vmtcc;
984 {
985 MutexLockerEx ml(Threads_lock);
986 Threads::threads_do(&vmtcc);
987 }
988
989 return vmtcc.count();
990 }
991
992 static jint get_num_flags() {
993 // last flag entry is always NULL, so subtract 1
994 int nFlags = (int) Flag::numFlags - 1;
995 int count = 0;
996 for (int i = 0; i < nFlags; i++) {
997 Flag* flag = &Flag::flags[i];
998 // Exclude the locked (diagnostic, experimental) flags
999 if (flag->is_unlocked() || flag->is_unlocker()) {
1000 count++;
1001 }
1002 }
1003 return count;
1004 }
1005
1006 static jlong get_long_attribute(jmmLongAttribute att) {
1007 switch (att) {
1008 case JMM_CLASS_LOADED_COUNT:
1009 return ClassLoadingService::loaded_class_count();
1010
1011 case JMM_CLASS_UNLOADED_COUNT:
1012 return ClassLoadingService::unloaded_class_count();
1013
1014 case JMM_THREAD_TOTAL_COUNT:
1015 return ThreadService::get_total_thread_count();
1016
1017 case JMM_THREAD_LIVE_COUNT:
1018 return ThreadService::get_live_thread_count();
1019
1020 case JMM_THREAD_PEAK_COUNT:
1021 return ThreadService::get_peak_thread_count();
1022
1023 case JMM_THREAD_DAEMON_COUNT:
1024 return ThreadService::get_daemon_thread_count();
1025
1026 case JMM_JVM_INIT_DONE_TIME_MS:
1027 return Management::vm_init_done_time();
1028
1029 case JMM_COMPILE_TOTAL_TIME_MS:
1030 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
1031
1032 case JMM_OS_PROCESS_ID:
1033 return os::current_process_id();
1034
1035 // Hotspot-specific counters
1036 case JMM_CLASS_LOADED_BYTES:
1037 return ClassLoadingService::loaded_class_bytes();
1038
1039 case JMM_CLASS_UNLOADED_BYTES:
1040 return ClassLoadingService::unloaded_class_bytes();
1041
1042 case JMM_SHARED_CLASS_LOADED_COUNT:
1043 return ClassLoadingService::loaded_shared_class_count();
1044
1045 case JMM_SHARED_CLASS_UNLOADED_COUNT:
1046 return ClassLoadingService::unloaded_shared_class_count();
1047
1048
1049 case JMM_SHARED_CLASS_LOADED_BYTES:
1050 return ClassLoadingService::loaded_shared_class_bytes();
1051
1052 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1053 return ClassLoadingService::unloaded_shared_class_bytes();
1054
1055 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1056 return ClassLoader::classloader_time_ms();
1057
1058 case JMM_VM_GLOBAL_COUNT:
1059 return get_num_flags();
1060
1061 case JMM_SAFEPOINT_COUNT:
1062 return RuntimeService::safepoint_count();
1063
1064 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1065 return RuntimeService::safepoint_sync_time_ms();
1066
1067 case JMM_TOTAL_STOPPED_TIME_MS:
1068 return RuntimeService::safepoint_time_ms();
1069
1070 case JMM_TOTAL_APP_TIME_MS:
1071 return RuntimeService::application_time_ms();
1072
1073 case JMM_VM_THREAD_COUNT:
1074 return get_vm_thread_count();
1075
1076 case JMM_CLASS_INIT_TOTAL_COUNT:
1077 return ClassLoader::class_init_count();
1078
1079 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1080 return ClassLoader::class_init_time_ms();
1081
1082 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1083 return ClassLoader::class_verify_time_ms();
1084
1085 case JMM_METHOD_DATA_SIZE_BYTES:
1086 return ClassLoadingService::class_method_data_size();
1087
1088 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1089 return os::physical_memory();
1090
1091 default:
1092 return -1;
1093 }
1094 }
1095
1096
1097 // Returns the long value of a given attribute.
1098 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
1099 if (obj == NULL) {
1100 return get_long_attribute(att);
1101 } else {
1102 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
1103 if (mgr != NULL) {
1104 return get_gc_attribute(mgr, att);
1105 }
1106 }
1107 return -1;
1108 JVM_END
1109
1110 // Gets the value of all attributes specified in the given array
1111 // and sets the value in the result array.
1112 // Returns the number of attributes found.
1113 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1114 jobject obj,
1115 jmmLongAttribute* atts,
1116 jint count,
1117 jlong* result))
1118
1119 int num_atts = 0;
1120 if (obj == NULL) {
1121 for (int i = 0; i < count; i++) {
1122 result[i] = get_long_attribute(atts[i]);
1123 if (result[i] != -1) {
1124 num_atts++;
1125 }
1126 }
1127 } else {
1128 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1129 for (int i = 0; i < count; i++) {
1130 result[i] = get_gc_attribute(mgr, atts[i]);
1131 if (result[i] != -1) {
1132 num_atts++;
1133 }
1134 }
1135 }
1136 return num_atts;
1137 JVM_END
1138
1139 // Helper function to do thread dump for a specific list of threads
1140 static void do_thread_dump(ThreadDumpResult* dump_result,
1141 typeArrayHandle ids_ah, // array of thread ID (long[])
1142 int num_threads,
1143 int max_depth,
1144 bool with_locked_monitors,
1145 bool with_locked_synchronizers,
1146 TRAPS) {
1147
1148 // First get an array of threadObj handles.
1149 // A JavaThread may terminate before we get the stack trace.
1150 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1151 {
1152 MutexLockerEx ml(Threads_lock);
1153 for (int i = 0; i < num_threads; i++) {
1154 jlong tid = ids_ah->long_at(i);
1155 JavaThread* jt = find_java_thread_from_id(tid);
1156 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
1157 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1158 thread_handle_array->append(threadObj_h);
1159 }
1160 }
1161
1162 // Obtain thread dumps and thread snapshot information
1163 VM_ThreadDump op(dump_result,
1164 thread_handle_array,
1165 num_threads,
1166 max_depth, /* stack depth */
1167 with_locked_monitors,
1168 with_locked_synchronizers);
1169 VMThread::execute(&op);
1170 }
1171
1172 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1173 // for the thread ID specified in the corresponding entry in
1174 // the given array of thread IDs; or NULL if the thread does not exist
1175 // or has terminated.
1176 //
1177 // Input parameters:
1178 // ids - array of thread IDs
1179 // maxDepth - the maximum depth of stack traces to be dumped:
1180 // maxDepth == -1 requests to dump entire stack trace.
1181 // maxDepth == 0 requests no stack trace.
1182 // infoArray - array of ThreadInfo objects
1183 //
1184 // QQQ - Why does this method return a value instead of void?
1185 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1186 // Check if threads is null
1187 if (ids == NULL || infoArray == NULL) {
1188 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1189 }
1190
1191 if (maxDepth < -1) {
1192 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1193 "Invalid maxDepth", -1);
1194 }
1195
1196 ResourceMark rm(THREAD);
1197 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1198 typeArrayHandle ids_ah(THREAD, ta);
1199
1200 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1201 objArrayOop oa = objArrayOop(infoArray_obj);
1202 objArrayHandle infoArray_h(THREAD, oa);
1203
1204 // validate the thread id array
1205 validate_thread_id_array(ids_ah, CHECK_0);
1206
1207 // validate the ThreadInfo[] parameters
1208 validate_thread_info_array(infoArray_h, CHECK_0);
1209
1210 // infoArray must be of the same length as the given array of thread IDs
1211 int num_threads = ids_ah->length();
1212 if (num_threads != infoArray_h->length()) {
1213 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1214 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1215 }
1216
1217 if (JDK_Version::is_gte_jdk16x_version()) {
1218 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1219 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1220 }
1221
1222 // Must use ThreadDumpResult to store the ThreadSnapshot.
1223 // GC may occur after the thread snapshots are taken but before
1224 // this function returns. The threadObj and other oops kept
1225 // in the ThreadSnapshot are marked and adjusted during GC.
1226 ThreadDumpResult dump_result(num_threads);
1227
1228 if (maxDepth == 0) {
1229 // no stack trace dumped - do not need to stop the world
1230 {
1231 MutexLockerEx ml(Threads_lock);
1232 for (int i = 0; i < num_threads; i++) {
1233 jlong tid = ids_ah->long_at(i);
1234 JavaThread* jt = find_java_thread_from_id(tid);
1235 ThreadSnapshot* ts;
1236 if (jt == NULL) {
1237 // if the thread does not exist or now it is terminated,
1238 // create dummy snapshot
1239 ts = new ThreadSnapshot();
1240 } else {
1241 ts = new ThreadSnapshot(jt);
1242 }
1243 dump_result.add_thread_snapshot(ts);
1244 }
1245 }
1246 } else {
1247 // obtain thread dump with the specific list of threads with stack trace
1248 do_thread_dump(&dump_result,
1249 ids_ah,
1250 num_threads,
1251 maxDepth,
1252 false, /* no locked monitor */
1253 false, /* no locked synchronizers */
1254 CHECK_0);
1255 }
1256
1257 int num_snapshots = dump_result.num_snapshots();
1258 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1259 int index = 0;
1260 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1261 // For each thread, create an java/lang/management/ThreadInfo object
1262 // and fill with the thread information
1263
1264 if (ts->threadObj() == NULL) {
1265 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1266 infoArray_h->obj_at_put(index, NULL);
1267 continue;
1268 }
1269
1270 // Create java.lang.management.ThreadInfo object
1271 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1272 infoArray_h->obj_at_put(index, info_obj);
1273 }
1274 return 0;
1275 JVM_END
1276
1277 // Dump thread info for the specified threads.
1278 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1279 // for the thread ID specified in the corresponding entry in
1280 // the given array of thread IDs; or NULL if the thread does not exist
1281 // or has terminated.
1282 //
1283 // Input parameter:
1284 // ids - array of thread IDs; NULL indicates all live threads
1285 // locked_monitors - if true, dump locked object monitors
1286 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1287 //
1288 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1289 ResourceMark rm(THREAD);
1290
1291 if (JDK_Version::is_gte_jdk16x_version()) {
1292 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1293 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1294 }
1295
1296 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1297 int num_threads = (ta != NULL ? ta->length() : 0);
1298 typeArrayHandle ids_ah(THREAD, ta);
1299
1300 ThreadDumpResult dump_result(num_threads); // can safepoint
1301
1302 if (ids_ah() != NULL) {
1303
1304 // validate the thread id array
1305 validate_thread_id_array(ids_ah, CHECK_NULL);
1306
1307 // obtain thread dump of a specific list of threads
1308 do_thread_dump(&dump_result,
1309 ids_ah,
1310 num_threads,
1311 -1, /* entire stack */
1312 (locked_monitors ? true : false), /* with locked monitors */
1313 (locked_synchronizers ? true : false), /* with locked synchronizers */
1314 CHECK_NULL);
1315 } else {
1316 // obtain thread dump of all threads
1317 VM_ThreadDump op(&dump_result,
1318 -1, /* entire stack */
1319 (locked_monitors ? true : false), /* with locked monitors */
1320 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1321 VMThread::execute(&op);
1322 }
1323
1324 int num_snapshots = dump_result.num_snapshots();
1325
1326 // create the result ThreadInfo[] object
1327 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1328 instanceKlassHandle ik (THREAD, k);
1329 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1330 objArrayHandle result_h(THREAD, r);
1331
1332 int index = 0;
1333 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1334 if (ts->threadObj() == NULL) {
1335 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1336 result_h->obj_at_put(index, NULL);
1337 continue;
1338 }
1339
1340 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1341 assert(stacktrace != NULL, "Must have a stack trace dumped");
1342
1343 // Create Object[] filled with locked monitors
1344 // Create int[] filled with the stack depth where a monitor was locked
1345 int num_frames = stacktrace->get_stack_depth();
1346 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1347
1348 // Count the total number of locked monitors
1349 for (int i = 0; i < num_frames; i++) {
1350 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1351 num_locked_monitors += frame->num_locked_monitors();
1352 }
1353
1354 objArrayHandle monitors_array;
1355 typeArrayHandle depths_array;
1356 objArrayHandle synchronizers_array;
1357
1358 if (locked_monitors) {
1359 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1360 // where the thread locked it
1361 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1362 objArrayHandle mh(THREAD, array);
1363 monitors_array = mh;
1364
1365 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1366 typeArrayHandle dh(THREAD, tarray);
1367 depths_array = dh;
1368
1369 int count = 0;
1370 int j = 0;
1371 for (int depth = 0; depth < num_frames; depth++) {
1372 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1373 int len = frame->num_locked_monitors();
1374 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1375 for (j = 0; j < len; j++) {
1376 oop monitor = locked_monitors->at(j);
1377 assert(monitor != NULL && monitor->is_instance(), "must be a Java object");
1378 monitors_array->obj_at_put(count, monitor);
1379 depths_array->int_at_put(count, depth);
1380 count++;
1381 }
1382 }
1383
1384 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1385 for (j = 0; j < jni_locked_monitors->length(); j++) {
1386 oop object = jni_locked_monitors->at(j);
1387 assert(object != NULL && object->is_instance(), "must be a Java object");
1388 monitors_array->obj_at_put(count, object);
1389 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1390 depths_array->int_at_put(count, -1);
1391 count++;
1392 }
1393 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1394 }
1395
1396 if (locked_synchronizers) {
1397 // Create Object[] filled with locked JSR-166 synchronizers
1398 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1399 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1400 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1401 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1402
1403 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1404 objArrayHandle sh(THREAD, array);
1405 synchronizers_array = sh;
1406
1407 for (int k = 0; k < num_locked_synchronizers; k++) {
1408 synchronizers_array->obj_at_put(k, locks->at(k));
1409 }
1410 }
1411
1412 // Create java.lang.management.ThreadInfo object
1413 instanceOop info_obj = Management::create_thread_info_instance(ts,
1414 monitors_array,
1415 depths_array,
1416 synchronizers_array,
1417 CHECK_NULL);
1418 result_h->obj_at_put(index, info_obj);
1419 }
1420
1421 return (jobjectArray) JNIHandles::make_local(env, result_h());
1422 JVM_END
1423
1424 // Returns an array of Class objects.
1425 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1426 ResourceMark rm(THREAD);
1427
1428 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1429
1430 int num_classes = lce.num_loaded_classes();
1431 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1432 objArrayHandle classes_ah(THREAD, r);
1433
1434 for (int i = 0; i < num_classes; i++) {
1435 KlassHandle kh = lce.get_klass(i);
1436 oop mirror = kh()->java_mirror();
1437 classes_ah->obj_at_put(i, mirror);
1438 }
1439
1440 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1441 JVM_END
1442
1443 // Reset statistic. Return true if the requested statistic is reset.
1444 // Otherwise, return false.
1445 //
1446 // Input parameters:
1447 // obj - specify which instance the statistic associated with to be reset
1448 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1449 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1450 // type - the type of statistic to be reset
1451 //
1452 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1453 ResourceMark rm(THREAD);
1454
1455 switch (type) {
1456 case JMM_STAT_PEAK_THREAD_COUNT:
1457 ThreadService::reset_peak_thread_count();
1458 return true;
1459
1460 case JMM_STAT_THREAD_CONTENTION_COUNT:
1461 case JMM_STAT_THREAD_CONTENTION_TIME: {
1462 jlong tid = obj.j;
1463 if (tid < 0) {
1464 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1465 }
1466
1467 // Look for the JavaThread of this given tid
1468 MutexLockerEx ml(Threads_lock);
1469 if (tid == 0) {
1470 // reset contention statistics for all threads if tid == 0
1471 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1472 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1473 ThreadService::reset_contention_count_stat(java_thread);
1474 } else {
1475 ThreadService::reset_contention_time_stat(java_thread);
1476 }
1477 }
1478 } else {
1479 // reset contention statistics for a given thread
1480 JavaThread* java_thread = find_java_thread_from_id(tid);
1481 if (java_thread == NULL) {
1482 return false;
1483 }
1484
1485 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1486 ThreadService::reset_contention_count_stat(java_thread);
1487 } else {
1488 ThreadService::reset_contention_time_stat(java_thread);
1489 }
1490 }
1491 return true;
1492 break;
1493 }
1494 case JMM_STAT_PEAK_POOL_USAGE: {
1495 jobject o = obj.l;
1496 if (o == NULL) {
1497 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1498 }
1499
1500 oop pool_obj = JNIHandles::resolve(o);
1501 assert(pool_obj->is_instance(), "Should be an instanceOop");
1502 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1503
1504 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1505 if (pool != NULL) {
1506 pool->reset_peak_memory_usage();
1507 return true;
1508 }
1509 break;
1510 }
1511 case JMM_STAT_GC_STAT: {
1512 jobject o = obj.l;
1513 if (o == NULL) {
1514 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1515 }
1516
1517 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1518 if (mgr != NULL) {
1519 mgr->reset_gc_stat();
1520 return true;
1521 }
1522 break;
1523 }
1524 default:
1525 assert(0, "Unknown Statistic Type");
1526 }
1527 return false;
1528 JVM_END
1529
1530 // Returns the fast estimate of CPU time consumed by
1531 // a given thread (in nanoseconds).
1532 // If thread_id == 0, return CPU time for the current thread.
1533 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1534 if (!os::is_thread_cpu_time_supported()) {
1535 return -1;
1536 }
1537
1538 if (thread_id < 0) {
1539 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1540 "Invalid thread ID", -1);
1541 }
1542
1543 JavaThread* java_thread = NULL;
1544 if (thread_id == 0) {
1545 // current thread
1546 return os::current_thread_cpu_time();
1547 } else {
1548 MutexLockerEx ml(Threads_lock);
1549 java_thread = find_java_thread_from_id(thread_id);
1550 if (java_thread != NULL) {
1551 return os::thread_cpu_time((Thread*) java_thread);
1552 }
1553 }
1554 return -1;
1555 JVM_END
1556
1557 // Returns the CPU time consumed by a given thread (in nanoseconds).
1558 // If thread_id == 0, CPU time for the current thread is returned.
1559 // If user_sys_cpu_time = true, user level and system CPU time of
1560 // a given thread is returned; otherwise, only user level CPU time
1561 // is returned.
1562 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
1563 if (!os::is_thread_cpu_time_supported()) {
1564 return -1;
1565 }
1566
1567 if (thread_id < 0) {
1568 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1569 "Invalid thread ID", -1);
1570 }
1571
1572 JavaThread* java_thread = NULL;
1573 if (thread_id == 0) {
1574 // current thread
1575 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
1576 } else {
1577 MutexLockerEx ml(Threads_lock);
1578 java_thread = find_java_thread_from_id(thread_id);
1579 if (java_thread != NULL) {
1580 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
1581 }
1582 }
1583 return -1;
1584 JVM_END
1585
1586 // Gets an array containing the CPU times consumed by a set of threads
1587 // (in nanoseconds). Each element of the array is the CPU time for the
1588 // thread ID specified in the corresponding entry in the given array
1589 // of thread IDs; or -1 if the thread does not exist or has terminated.
1590 // If user_sys_cpu_time = true, the sum of user level and system CPU time
1591 // for the given thread is returned; otherwise, only user level CPU time
1592 // is returned.
1593 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
1594 jlongArray timeArray,
1595 jboolean user_sys_cpu_time))
1596 // Check if threads is null
1597 if (ids == NULL || timeArray == NULL) {
1598 THROW(vmSymbols::java_lang_NullPointerException());
1599 }
1600
1601 ResourceMark rm(THREAD);
1602 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1603 typeArrayHandle ids_ah(THREAD, ta);
1604
1605 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
1606 typeArrayHandle timeArray_h(THREAD, tia);
1607
1608 // validate the thread id array
1609 validate_thread_id_array(ids_ah, CHECK);
1610
1611 // timeArray must be of the same length as the given array of thread IDs
1612 int num_threads = ids_ah->length();
1613 if (num_threads != timeArray_h->length()) {
1614 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1615 "The length of the given long array does not match the length of "
1616 "the given array of thread IDs");
1617 }
1618
1619 MutexLockerEx ml(Threads_lock);
1620 for (int i = 0; i < num_threads; i++) {
1621 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i));
1622 if (java_thread != NULL) {
1623 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
1624 user_sys_cpu_time != 0));
1625 }
1626 }
1627 JVM_END
1628
1629 // Returns a String array of all VM global flag names
1630 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1631 // last flag entry is always NULL, so subtract 1
1632 int nFlags = (int) Flag::numFlags - 1;
1633 // allocate a temp array
1634 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1635 nFlags, CHECK_0);
1636 objArrayHandle flags_ah(THREAD, r);
1637 int num_entries = 0;
1638 for (int i = 0; i < nFlags; i++) {
1639 Flag* flag = &Flag::flags[i];
1640 // Exclude the locked (experimental, diagnostic) flags
1641 if (flag->is_unlocked() || flag->is_unlocker()) {
1642 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0);
1643 flags_ah->obj_at_put(num_entries, s());
1644 num_entries++;
1645 }
1646 }
1647
1648 if (num_entries < nFlags) {
1649 // Return array of right length
1650 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1651 for(int i = 0; i < num_entries; i++) {
1652 res->obj_at_put(i, flags_ah->obj_at(i));
1653 }
1654 return (jobjectArray)JNIHandles::make_local(env, res);
1655 }
1656
1657 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1658 JVM_END
1659
1660 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1661 // can't be determined, true otherwise. If false is returned, then *global
1662 // will be incomplete and invalid.
1663 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1664 Handle flag_name;
1665 if (name() == NULL) {
1666 flag_name = java_lang_String::create_from_str(flag->name, CHECK_false);
1667 } else {
1668 flag_name = name;
1669 }
1670 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1671
1672 if (flag->is_bool()) {
1673 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1674 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1675 } else if (flag->is_intx()) {
1676 global->value.j = (jlong)flag->get_intx();
1677 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1678 } else if (flag->is_uintx()) {
1679 global->value.j = (jlong)flag->get_uintx();
1680 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1681 } else if (flag->is_uint64_t()) {
1682 global->value.j = (jlong)flag->get_uint64_t();
1683 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1684 } else if (flag->is_ccstr()) {
1685 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1686 global->value.l = (jobject)JNIHandles::make_local(env, str());
1687 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1688 } else {
1689 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1690 return false;
1691 }
1692
1693 global->writeable = flag->is_writeable();
1694 global->external = flag->is_external();
1695 switch (flag->origin) {
1696 case DEFAULT:
1697 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1698 break;
1699 case COMMAND_LINE:
1700 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1701 break;
1702 case ENVIRON_VAR:
1703 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1704 break;
1705 case CONFIG_FILE:
1706 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1707 break;
1708 case MANAGEMENT:
1709 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1710 break;
1711 case ERGONOMIC:
1712 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1713 break;
1714 default:
1715 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1716 }
1717
1718 return true;
1719 }
1720
1721 // Fill globals array of count length with jmmVMGlobal entries
1722 // specified by names. If names == NULL, fill globals array
1723 // with all Flags. Return value is number of entries
1724 // created in globals.
1725 // If a Flag with a given name in an array element does not
1726 // exist, globals[i].name will be set to NULL.
1727 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1728 jobjectArray names,
1729 jmmVMGlobal *globals,
1730 jint count))
1731
1732
1733 if (globals == NULL) {
1734 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1735 }
1736
1737 ResourceMark rm(THREAD);
1738
1739 if (names != NULL) {
1740 // return the requested globals
1741 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1742 objArrayHandle names_ah(THREAD, ta);
1743 // Make sure we have a String array
1744 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1745 if (element_klass != SystemDictionary::String_klass()) {
1746 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1747 "Array element type is not String class", 0);
1748 }
1749
1750 int names_length = names_ah->length();
1751 int num_entries = 0;
1752 for (int i = 0; i < names_length && i < count; i++) {
1753 oop s = names_ah->obj_at(i);
1754 if (s == NULL) {
1755 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1756 }
1757
1758 Handle sh(THREAD, s);
1759 char* str = java_lang_String::as_utf8_string(s);
1760 Flag* flag = Flag::find_flag(str, strlen(str));
1761 if (flag != NULL &&
1762 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1763 num_entries++;
1764 } else {
1765 globals[i].name = NULL;
1766 }
1767 }
1768 return num_entries;
1769 } else {
1770 // return all globals if names == NULL
1771
1772 // last flag entry is always NULL, so subtract 1
1773 int nFlags = (int) Flag::numFlags - 1;
1774 Handle null_h;
1775 int num_entries = 0;
1776 for (int i = 0; i < nFlags && num_entries < count; i++) {
1777 Flag* flag = &Flag::flags[i];
1778 // Exclude the locked (diagnostic, experimental) flags
1779 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1780 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1781 num_entries++;
1782 }
1783 }
1784 return num_entries;
1785 }
1786 JVM_END
1787
1788 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1789 ResourceMark rm(THREAD);
1790
1791 oop fn = JNIHandles::resolve_external_guard(flag_name);
1792 if (fn == NULL) {
1793 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1794 "The flag name cannot be null.");
1795 }
1796 char* name = java_lang_String::as_utf8_string(fn);
1797 Flag* flag = Flag::find_flag(name, strlen(name));
1798 if (flag == NULL) {
1799 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1800 "Flag does not exist.");
1801 }
1802 if (!flag->is_writeable()) {
1803 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1804 "This flag is not writeable.");
1805 }
1806
1807 bool succeed;
1808 if (flag->is_bool()) {
1809 bool bvalue = (new_value.z == JNI_TRUE ? true : false);
1810 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT);
1811 } else if (flag->is_intx()) {
1812 intx ivalue = (intx)new_value.j;
1813 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT);
1814 } else if (flag->is_uintx()) {
1815 uintx uvalue = (uintx)new_value.j;
1816 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT);
1817 } else if (flag->is_uint64_t()) {
1818 uint64_t uvalue = (uint64_t)new_value.j;
1819 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT);
1820 } else if (flag->is_ccstr()) {
1821 oop str = JNIHandles::resolve_external_guard(new_value.l);
1822 if (str == NULL) {
1823 THROW(vmSymbols::java_lang_NullPointerException());
1824 }
1825 ccstr svalue = java_lang_String::as_utf8_string(str);
1826 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT);
1827 }
1828 assert(succeed, "Setting flag should succeed");
1829 JVM_END
1830
1831 class ThreadTimesClosure: public ThreadClosure {
1832 private:
1833 objArrayHandle _names_strings;
1834 char **_names_chars;
1835 typeArrayOop _times;
1836 int _names_len;
1837 int _times_len;
1838 int _count;
1839
1840 public:
1841 ThreadTimesClosure(objArrayHandle names, typeArrayOop times);
1842 ~ThreadTimesClosure();
1843 virtual void do_thread(Thread* thread);
1844 void do_unlocked();
1845 int count() { return _count; }
1846 };
1847
1848 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1849 typeArrayOop times) {
1850 assert(names() != NULL, "names was NULL");
1851 assert(times != NULL, "times was NULL");
1852 _names_strings = names;
1853 _names_len = names->length();
1854 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1855 _times = times;
1856 _times_len = times->length();
1857 _count = 0;
1858 }
1859
1860 //
1861 // Called with Threads_lock held
1862 //
1863 void ThreadTimesClosure::do_thread(Thread* thread) {
1864 assert(thread != NULL, "thread was NULL");
1865
1866 // exclude externally visible JavaThreads
1867 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1868 return;
1869 }
1870
1871 if (_count >= _names_len || _count >= _times_len) {
1872 // skip if the result array is not big enough
1873 return;
1874 }
1875
1876 EXCEPTION_MARK;
1877 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1878
1879 assert(thread->name() != NULL, "All threads should have a name");
1880 _names_chars[_count] = strdup(thread->name());
1881 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1882 os::thread_cpu_time(thread) : -1);
1883 _count++;
1884 }
1885
1886 // Called without Threads_lock, we can allocate String objects.
1887 void ThreadTimesClosure::do_unlocked() {
1888
1889 EXCEPTION_MARK;
1890 for (int i = 0; i < _count; i++) {
1891 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1892 _names_strings->obj_at_put(i, s());
1893 }
1894 }
1895
1896 ThreadTimesClosure::~ThreadTimesClosure() {
1897 for (int i = 0; i < _count; i++) {
1898 free(_names_chars[i]);
1899 }
1900 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal);
1901 }
1902
1903 // Fills names with VM internal thread names and times with the corresponding
1904 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1905 // If the element type of names is not String, an IllegalArgumentException is
1906 // thrown.
1907 // If an array is not large enough to hold all the entries, only the entries
1908 // that fit will be returned. Return value is the number of VM internal
1909 // threads entries.
1910 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1911 jobjectArray names,
1912 jlongArray times))
1913 if (names == NULL || times == NULL) {
1914 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1915 }
1916 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1917 objArrayHandle names_ah(THREAD, na);
1918
1919 // Make sure we have a String array
1920 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1921 if (element_klass != SystemDictionary::String_klass()) {
1922 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1923 "Array element type is not String class", 0);
1924 }
1925
1926 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1927 typeArrayHandle times_ah(THREAD, ta);
1928
1929 ThreadTimesClosure ttc(names_ah, times_ah());
1930 {
1931 MutexLockerEx ml(Threads_lock);
1932 Threads::threads_do(&ttc);
1933 }
1934 ttc.do_unlocked();
1935 return ttc.count();
1936 JVM_END
1937
1938 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1939 ResourceMark rm(THREAD);
1940
1941 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1942 VMThread::execute(&op);
1943
1944 DeadlockCycle* deadlocks = op.result();
1945 if (deadlocks == NULL) {
1946 // no deadlock found and return
1947 return Handle();
1948 }
1949
1950 int num_threads = 0;
1951 DeadlockCycle* cycle;
1952 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1953 num_threads += cycle->num_threads();
1954 }
1955
1956 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1957 objArrayHandle threads_ah(THREAD, r);
1958
1959 int index = 0;
1960 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1961 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1962 int len = deadlock_threads->length();
1963 for (int i = 0; i < len; i++) {
1964 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1965 index++;
1966 }
1967 }
1968 return threads_ah;
1969 }
1970
1971 // Finds cycles of threads that are deadlocked involved in object monitors
1972 // and JSR-166 synchronizers.
1973 // Returns an array of Thread objects which are in deadlock, if any.
1974 // Otherwise, returns NULL.
1975 //
1976 // Input parameter:
1977 // object_monitors_only - if true, only check object monitors
1978 //
1979 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1980 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
1981 return (jobjectArray) JNIHandles::make_local(env, result());
1982 JVM_END
1983
1984 // Finds cycles of threads that are deadlocked on monitor locks
1985 // Returns an array of Thread objects which are in deadlock, if any.
1986 // Otherwise, returns NULL.
1987 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1988 Handle result = find_deadlocks(true, CHECK_0);
1989 return (jobjectArray) JNIHandles::make_local(env, result());
1990 JVM_END
1991
1992 // Gets the information about GC extension attributes including
1993 // the name of the attribute, its type, and a short description.
1994 //
1995 // Input parameters:
1996 // mgr - GC memory manager
1997 // info - caller allocated array of jmmExtAttributeInfo
1998 // count - number of elements of the info array
1999 //
2000 // Returns the number of GC extension attributes filled in the info array; or
2001 // -1 if info is not big enough
2002 //
2003 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
2004 // All GC memory managers have 1 attribute (number of GC threads)
2005 if (count == 0) {
2006 return 0;
2007 }
2008
2009 if (info == NULL) {
2010 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
2011 }
2012
2013 info[0].name = "GcThreadCount";
2014 info[0].type = 'I';
2015 info[0].description = "Number of GC threads";
2016 return 1;
2017 JVM_END
2018
2019 // verify the given array is an array of java/lang/management/MemoryUsage objects
2020 // of a given length and return the objArrayOop
2021 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
2022 if (array == NULL) {
2023 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
2024 }
2025
2026 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
2027 objArrayHandle array_h(THREAD, oa);
2028
2029 // array must be of the given length
2030 if (length != array_h->length()) {
2031 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2032 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
2033 }
2034
2035 // check if the element of array is of type MemoryUsage class
2036 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
2037 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
2038 if (element_klass != usage_klass) {
2039 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2040 "The element type is not MemoryUsage class", 0);
2041 }
2042
2043 return array_h();
2044 }
2045
2046 // Gets the statistics of the last GC of a given GC memory manager.
2047 // Input parameters:
2048 // obj - GarbageCollectorMXBean object
2049 // gc_stat - caller allocated jmmGCStat where:
2050 // a. before_gc_usage - array of MemoryUsage objects
2051 // b. after_gc_usage - array of MemoryUsage objects
2052 // c. gc_ext_attributes_values_size is set to the
2053 // gc_ext_attribute_values array allocated
2054 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
2055 //
2056 // On return,
2057 // gc_index == 0 indicates no GC statistics available
2058 //
2059 // before_gc_usage and after_gc_usage - filled with per memory pool
2060 // before and after GC usage in the same order as the memory pools
2061 // returned by GetMemoryPools for a given GC memory manager.
2062 // num_gc_ext_attributes indicates the number of elements in
2063 // the gc_ext_attribute_values array is filled; or
2064 // -1 if the gc_ext_attributes_values array is not big enough
2065 //
2066 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
2067 ResourceMark rm(THREAD);
2068
2069 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
2070 THROW(vmSymbols::java_lang_NullPointerException());
2071 }
2072
2073 // Get the GCMemoryManager
2074 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2075
2076 // Make a copy of the last GC statistics
2077 // GC may occur while constructing the last GC information
2078 int num_pools = MemoryService::num_memory_pools();
2079 GCStatInfo stat(num_pools);
2080 if (mgr->get_last_gc_stat(&stat) == 0) {
2081 gc_stat->gc_index = 0;
2082 return;
2083 }
2084
2085 gc_stat->gc_index = stat.gc_index();
2086 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
2087 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
2088
2089 // Current implementation does not have GC extension attributes
2090 gc_stat->num_gc_ext_attributes = 0;
2091
2092 // Fill the arrays of MemoryUsage objects with before and after GC
2093 // per pool memory usage
2094 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
2095 num_pools,
2096 CHECK);
2097 objArrayHandle usage_before_gc_ah(THREAD, bu);
2098
2099 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
2100 num_pools,
2101 CHECK);
2102 objArrayHandle usage_after_gc_ah(THREAD, au);
2103
2104 for (int i = 0; i < num_pools; i++) {
2105 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
2106 Handle after_usage;
2107
2108 MemoryUsage u = stat.after_gc_usage_for_pool(i);
2109 if (u.max_size() == 0 && u.used() > 0) {
2110 // If max size == 0, this pool is a survivor space.
2111 // Set max size = -1 since the pools will be swapped after GC.
2112 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
2113 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
2114 } else {
2115 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
2116 }
2117 usage_before_gc_ah->obj_at_put(i, before_usage());
2118 usage_after_gc_ah->obj_at_put(i, after_usage());
2119 }
2120
2121 if (gc_stat->gc_ext_attribute_values_size > 0) {
2122 // Current implementation only has 1 attribute (number of GC threads)
2123 // The type is 'I'
2124 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2125 }
2126 JVM_END
2127
2128 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2129 ResourceMark rm(THREAD);
2130 // Get the GCMemoryManager
2131 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2132 mgr->set_notification_enabled(enabled?true:false);
2133 JVM_END
2134
2135 // Dump heap - Returns 0 if succeeds.
2136 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2137 #if INCLUDE_SERVICES
2138 ResourceMark rm(THREAD);
2139 oop on = JNIHandles::resolve_external_guard(outputfile);
2140 if (on == NULL) {
2141 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2142 "Output file name cannot be null.", -1);
2143 }
2144 char* name = java_lang_String::as_utf8_string(on);
2145 if (name == NULL) {
2146 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2147 "Output file name cannot be null.", -1);
2148 }
2149 HeapDumper dumper(live ? true : false);
2150 if (dumper.dump(name) != 0) {
2151 const char* errmsg = dumper.error_as_C_string();
2152 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2153 }
2154 return 0;
2155 #else // INCLUDE_SERVICES
2156 return -1;
2157 #endif // INCLUDE_SERVICES
2158 JVM_END
2159
2160 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2161 ResourceMark rm(THREAD);
2162 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2163 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2164 dcmd_list->length(), CHECK_NULL);
2165 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2166 for (int i = 0; i < dcmd_list->length(); i++) {
2167 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2168 cmd_array->obj_at_put(i, cmd_name);
2169 }
2170 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2171 JVM_END
2172
2173 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2174 dcmdInfo* infoArray))
2175 if (cmds == NULL || infoArray == NULL) {
2176 THROW(vmSymbols::java_lang_NullPointerException());
2177 }
2178
2179 ResourceMark rm(THREAD);
2180
2181 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2182 objArrayHandle cmds_ah(THREAD, ca);
2183
2184 // Make sure we have a String array
2185 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2186 if (element_klass != SystemDictionary::String_klass()) {
2187 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2188 "Array element type is not String class");
2189 }
2190
2191 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2192
2193 int num_cmds = cmds_ah->length();
2194 for (int i = 0; i < num_cmds; i++) {
2195 oop cmd = cmds_ah->obj_at(i);
2196 if (cmd == NULL) {
2197 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2198 "Command name cannot be null.");
2199 }
2200 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2201 if (cmd_name == NULL) {
2202 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2203 "Command name cannot be null.");
2204 }
2205 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2206 if (pos == -1) {
2207 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2208 "Unknown diagnostic command");
2209 }
2210 DCmdInfo* info = info_list->at(pos);
2211 infoArray[i].name = info->name();
2212 infoArray[i].description = info->description();
2213 infoArray[i].impact = info->impact();
2214 JavaPermission p = info->permission();
2215 infoArray[i].permission_class = p._class;
2216 infoArray[i].permission_name = p._name;
2217 infoArray[i].permission_action = p._action;
2218 infoArray[i].num_arguments = info->num_arguments();
2219 infoArray[i].enabled = info->is_enabled();
2220 }
2221 JVM_END
2222
2223 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2224 jstring command, dcmdArgInfo* infoArray))
2225 ResourceMark rm(THREAD);
2226 oop cmd = JNIHandles::resolve_external_guard(command);
2227 if (cmd == NULL) {
2228 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2229 "Command line cannot be null.");
2230 }
2231 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2232 if (cmd_name == NULL) {
2233 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2234 "Command line content cannot be null.");
2235 }
2236 DCmd* dcmd = NULL;
2237 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2238 strlen(cmd_name));
2239 if (factory != NULL) {
2240 dcmd = factory->create_resource_instance(NULL);
2241 }
2242 if (dcmd == NULL) {
2243 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2244 "Unknown diagnostic command");
2245 }
2246 DCmdMark mark(dcmd);
2247 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2248 if (array->length() == 0) {
2249 return;
2250 }
2251 for (int i = 0; i < array->length(); i++) {
2252 infoArray[i].name = array->at(i)->name();
2253 infoArray[i].description = array->at(i)->description();
2254 infoArray[i].type = array->at(i)->type();
2255 infoArray[i].default_string = array->at(i)->default_string();
2256 infoArray[i].mandatory = array->at(i)->is_mandatory();
2257 infoArray[i].option = array->at(i)->is_option();
2258 infoArray[i].multiple = array->at(i)->is_multiple();
2259 infoArray[i].position = array->at(i)->position();
2260 }
2261 return;
2262 JVM_END
2263
2264 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2265 ResourceMark rm(THREAD);
2266 oop cmd = JNIHandles::resolve_external_guard(commandline);
2267 if (cmd == NULL) {
2268 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2269 "Command line cannot be null.");
2270 }
2271 char* cmdline = java_lang_String::as_utf8_string(cmd);
2272 if (cmdline == NULL) {
2273 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2274 "Command line content cannot be null.");
2275 }
2276 bufferedStream output;
2277 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2278 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2279 return (jstring) JNIHandles::make_local(env, result);
2280 JVM_END
2281
2282 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2283 DCmdFactory::set_jmx_notification_enabed(enabled?true:false);
2284 JVM_END
2285
2286 jlong Management::ticks_to_ms(jlong ticks) {
2287 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2288 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2289 * (double)1000.0);
2290 }
2291
2292 const struct jmmInterface_1_ jmm_interface = {
2293 NULL,
2294 NULL,
2295 jmm_GetVersion,
2296 jmm_GetOptionalSupport,
2297 jmm_GetInputArguments,
2298 jmm_GetThreadInfo,
2299 jmm_GetInputArgumentArray,
2300 jmm_GetMemoryPools,
2301 jmm_GetMemoryManagers,
2302 jmm_GetMemoryPoolUsage,
2303 jmm_GetPeakMemoryPoolUsage,
2304 jmm_GetThreadAllocatedMemory,
2305 jmm_GetMemoryUsage,
2306 jmm_GetLongAttribute,
2307 jmm_GetBoolAttribute,
2308 jmm_SetBoolAttribute,
2309 jmm_GetLongAttributes,
2310 jmm_FindMonitorDeadlockedThreads,
2311 jmm_GetThreadCpuTime,
2312 jmm_GetVMGlobalNames,
2313 jmm_GetVMGlobals,
2314 jmm_GetInternalThreadTimes,
2315 jmm_ResetStatistic,
2316 jmm_SetPoolSensor,
2317 jmm_SetPoolThreshold,
2318 jmm_GetPoolCollectionUsage,
2319 jmm_GetGCExtAttributeInfo,
2320 jmm_GetLastGCStat,
2321 jmm_GetThreadCpuTimeWithKind,
2322 jmm_GetThreadCpuTimesWithKind,
2323 jmm_DumpHeap0,
2324 jmm_FindDeadlockedThreads,
2325 jmm_SetVMGlobal,
2326 NULL,
2327 jmm_DumpThreads,
2328 jmm_SetGCNotificationEnabled,
2329 jmm_GetDiagnosticCommands,
2330 jmm_GetDiagnosticCommandInfo,
2331 jmm_GetDiagnosticCommandArgumentsInfo,
2332 jmm_ExecuteDiagnosticCommand,
2333 jmm_SetDiagnosticFrameworkNotificationEnabled
2334 };
2335 #endif // INCLUDE_MANAGEMENT
2336
2337 void* Management::get_jmm_interface(int version) {
2338 #if INCLUDE_MANAGEMENT
2339 if (version == JMM_VERSION_1_0) {
2340 return (void*) &jmm_interface;
2341 }
2342 #endif // INCLUDE_MANAGEMENT
2343 return NULL;
2344 }