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 // Make sure the VM version is initialized
90 // This is normally called by RuntimeService::init().
91 // Since that is conditionalized out, we need to call it here.
92 Abstract_VM_Version::initialize();
93 #endif // INCLUDE_MANAGEMENT
94 }
95
96 #if INCLUDE_MANAGEMENT
97
98 void Management::init() {
99 EXCEPTION_MARK;
100
101 // These counters are for java.lang.management API support.
102 // They are created even if -XX:-UsePerfData is set and in
103 // that case, they will be allocated on C heap.
104
105 _begin_vm_creation_time =
106 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
107 PerfData::U_None, CHECK);
108
109 _end_vm_creation_time =
110 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
111 PerfData::U_None, CHECK);
112
113 _vm_init_done_time =
114 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
115 PerfData::U_None, CHECK);
116
117 // Initialize optional support
118 _optional_support.isLowMemoryDetectionSupported = 1;
119 _optional_support.isCompilationTimeMonitoringSupported = 1;
120 _optional_support.isThreadContentionMonitoringSupported = 1;
121
122 if (os::is_thread_cpu_time_supported()) {
123 _optional_support.isCurrentThreadCpuTimeSupported = 1;
124 _optional_support.isOtherThreadCpuTimeSupported = 1;
125 } else {
126 _optional_support.isCurrentThreadCpuTimeSupported = 0;
127 _optional_support.isOtherThreadCpuTimeSupported = 0;
128 }
129
130 _optional_support.isBootClassPathSupported = 1;
131 _optional_support.isObjectMonitorUsageSupported = 1;
132 #if INCLUDE_SERVICES
133 // This depends on the heap inspector
134 _optional_support.isSynchronizerUsageSupported = 1;
135 #endif // INCLUDE_SERVICES
136 _optional_support.isThreadAllocatedMemorySupported = 1;
137 _optional_support.isRemoteDiagnosticCommandsSupported = 1;
138
139 // Registration of the diagnostic commands
140 DCmdRegistrant::register_dcmds();
141 DCmdRegistrant::register_dcmds_ext();
142 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
143 | DCmd_Source_MBean;
144 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
145 }
146
147 void Management::initialize(TRAPS) {
148 // Start the service thread
149 ServiceThread::initialize();
150
151 if (ManagementServer) {
152 ResourceMark rm(THREAD);
153 HandleMark hm(THREAD);
154
155 // Load and initialize the sun.management.Agent class
156 // invoke startAgent method to start the management server
157 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
158 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_management_Agent(),
159 loader,
160 Handle(),
161 THREAD);
162 if (k == NULL) {
163 vm_exit_during_initialization("Management agent initialization failure: "
164 "class sun.management.Agent not found.");
165 }
166 instanceKlassHandle ik (THREAD, k);
167
168 JavaValue result(T_VOID);
169 JavaCalls::call_static(&result,
170 ik,
171 vmSymbols::startAgent_name(),
172 vmSymbols::void_method_signature(),
173 CHECK);
174 }
175 }
176
177 void Management::get_optional_support(jmmOptionalSupport* support) {
178 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
179 }
180
181 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
182 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
183 instanceKlassHandle ik (THREAD, k);
184 if (ik->should_be_initialized()) {
185 ik->initialize(CHECK_NULL);
186 }
187 // If these classes change to not be owned by the boot loader, they need
188 // to be walked to keep their class loader alive in oops_do.
189 assert(ik->class_loader() == NULL, "need to follow in oops_do");
190 return ik();
191 }
192
193 void Management::record_vm_startup_time(jlong begin, jlong duration) {
194 // if the performance counter is not initialized,
195 // then vm initialization failed; simply return.
196 if (_begin_vm_creation_time == NULL) return;
197
198 _begin_vm_creation_time->set_value(begin);
199 _end_vm_creation_time->set_value(begin + duration);
200 PerfMemory::set_accessible(true);
201 }
202
203 jlong Management::timestamp() {
204 TimeStamp t;
205 t.update();
206 return t.ticks() - _stamp.ticks();
207 }
208
209 void Management::oops_do(OopClosure* f) {
210 MemoryService::oops_do(f);
211 ThreadService::oops_do(f);
212 }
213
214 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
215 if (_threadInfo_klass == NULL) {
216 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
217 }
218 return _threadInfo_klass;
219 }
220
221 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
222 if (_memoryUsage_klass == NULL) {
223 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
224 }
225 return _memoryUsage_klass;
226 }
227
228 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
229 if (_memoryPoolMXBean_klass == NULL) {
230 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
231 }
232 return _memoryPoolMXBean_klass;
233 }
234
235 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
236 if (_memoryManagerMXBean_klass == NULL) {
237 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
238 }
239 return _memoryManagerMXBean_klass;
240 }
241
242 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
243 if (_garbageCollectorMXBean_klass == NULL) {
244 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
245 }
246 return _garbageCollectorMXBean_klass;
247 }
248
249 Klass* Management::sun_management_Sensor_klass(TRAPS) {
250 if (_sensor_klass == NULL) {
251 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
252 }
253 return _sensor_klass;
254 }
255
256 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
257 if (_managementFactoryHelper_klass == NULL) {
258 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
259 }
260 return _managementFactoryHelper_klass;
261 }
262
263 Klass* Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS) {
264 if (_garbageCollectorExtImpl_klass == NULL) {
265 _garbageCollectorExtImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_GarbageCollectorExtImpl(), CHECK_NULL);
266 }
267 return _garbageCollectorExtImpl_klass;
268 }
269
270 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) {
271 if (_gcInfo_klass == NULL) {
272 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
273 }
274 return _gcInfo_klass;
275 }
276
277 Klass* Management::com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS) {
278 if (_diagnosticCommandImpl_klass == NULL) {
279 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::com_sun_management_internal_DiagnosticCommandImpl(), CHECK_NULL);
280 }
281 return _diagnosticCommandImpl_klass;
282 }
283
284 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
285 Handle snapshot_thread(THREAD, snapshot->threadObj());
286
287 jlong contended_time;
288 jlong waited_time;
289 if (ThreadService::is_thread_monitoring_contention()) {
290 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
291 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
292 } else {
293 // set them to -1 if thread contention monitoring is disabled.
294 contended_time = max_julong;
295 waited_time = max_julong;
296 }
297
298 int thread_status = snapshot->thread_status();
299 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
300 if (snapshot->is_ext_suspended()) {
301 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
302 }
303 if (snapshot->is_in_native()) {
304 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
305 }
306
307 ThreadStackTrace* st = snapshot->get_stack_trace();
308 Handle stacktrace_h;
309 if (st != NULL) {
310 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
311 } else {
312 stacktrace_h = Handle();
313 }
314
315 args->push_oop(snapshot_thread);
316 args->push_int(thread_status);
317 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
318 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
319 args->push_long(snapshot->contended_enter_count());
320 args->push_long(contended_time);
321 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
322 args->push_long(waited_time);
323 args->push_oop(stacktrace_h);
324 }
325
326 // Helper function to construct a ThreadInfo object
327 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
328 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
329 instanceKlassHandle ik (THREAD, k);
330
331 JavaValue result(T_VOID);
332 JavaCallArguments args(14);
333
334 // First allocate a ThreadObj object and
335 // push the receiver as the first argument
336 Handle element = ik->allocate_instance_handle(CHECK_NULL);
337 args.push_oop(element);
338
339 // initialize the arguments for the ThreadInfo constructor
340 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
341
342 // Call ThreadInfo constructor with no locked monitors and synchronizers
343 JavaCalls::call_special(&result,
344 ik,
345 vmSymbols::object_initializer_name(),
346 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
347 &args,
348 CHECK_NULL);
349
350 return (instanceOop) element();
351 }
352
353 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
354 objArrayHandle monitors_array,
355 typeArrayHandle depths_array,
356 objArrayHandle synchronizers_array,
357 TRAPS) {
358 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
359 instanceKlassHandle ik (THREAD, k);
360
361 JavaValue result(T_VOID);
362 JavaCallArguments args(17);
363
364 // First allocate a ThreadObj object and
365 // push the receiver as the first argument
366 Handle element = ik->allocate_instance_handle(CHECK_NULL);
367 args.push_oop(element);
368
369 // initialize the arguments for the ThreadInfo constructor
370 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
371
372 // push the locked monitors and synchronizers in the arguments
373 args.push_oop(monitors_array);
374 args.push_oop(depths_array);
375 args.push_oop(synchronizers_array);
376
377 // Call ThreadInfo constructor with locked monitors and synchronizers
378 JavaCalls::call_special(&result,
379 ik,
380 vmSymbols::object_initializer_name(),
381 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
382 &args,
383 CHECK_NULL);
384
385 return (instanceOop) element();
386 }
387
388
389 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
390 if (mgr == NULL) {
391 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
392 }
393 oop mgr_obj = JNIHandles::resolve(mgr);
394 instanceHandle h(THREAD, (instanceOop) mgr_obj);
395
396 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
397 if (!h->is_a(k)) {
398 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
399 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
400 NULL);
401 }
402
403 MemoryManager* gc = MemoryService::get_memory_manager(h);
404 if (gc == NULL || !gc->is_gc_memory_manager()) {
405 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
406 "Invalid GC memory manager",
407 NULL);
408 }
409 return (GCMemoryManager*) gc;
410 }
411
412 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
413 if (obj == NULL) {
414 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
415 }
416
417 oop pool_obj = JNIHandles::resolve(obj);
418 assert(pool_obj->is_instance(), "Should be an instanceOop");
419 instanceHandle ph(THREAD, (instanceOop) pool_obj);
420
421 return MemoryService::get_memory_pool(ph);
422 }
423
424 #endif // INCLUDE_MANAGEMENT
425
426 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
427 int num_threads = ids_ah->length();
428
429 // Validate input thread IDs
430 int i = 0;
431 for (i = 0; i < num_threads; i++) {
432 jlong tid = ids_ah->long_at(i);
433 if (tid <= 0) {
434 // throw exception if invalid thread id.
435 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
436 "Invalid thread ID entry");
437 }
438 }
439 }
440
441 #if INCLUDE_MANAGEMENT
442
443 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
444 // check if the element of infoArray is of type ThreadInfo class
445 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
446 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
447 if (element_klass != threadinfo_klass) {
448 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
449 "infoArray element type is not ThreadInfo class");
450 }
451 }
452
453
454 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
455 if (obj == NULL) {
456 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
457 }
458
459 oop mgr_obj = JNIHandles::resolve(obj);
460 assert(mgr_obj->is_instance(), "Should be an instanceOop");
461 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
462
463 return MemoryService::get_memory_manager(mh);
464 }
465
466 // Returns a version string and sets major and minor version if
467 // the input parameters are non-null.
468 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
469 return JMM_VERSION;
470 JVM_END
471
472 // Gets the list of VM monitoring and management optional supports
473 // Returns 0 if succeeded; otherwise returns non-zero.
474 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
475 if (support == NULL) {
476 return -1;
477 }
478 Management::get_optional_support(support);
479 return 0;
480 JVM_END
481
482 // Returns a java.lang.String object containing the input arguments to the VM.
483 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
484 ResourceMark rm(THREAD);
485
486 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
487 return NULL;
488 }
489
490 char** vm_flags = Arguments::jvm_flags_array();
491 char** vm_args = Arguments::jvm_args_array();
492 int num_flags = Arguments::num_jvm_flags();
493 int num_args = Arguments::num_jvm_args();
494
495 size_t length = 1; // null terminator
496 int i;
497 for (i = 0; i < num_flags; i++) {
498 length += strlen(vm_flags[i]);
499 }
500 for (i = 0; i < num_args; i++) {
501 length += strlen(vm_args[i]);
502 }
503 // add a space between each argument
504 length += num_flags + num_args - 1;
505
506 // Return the list of input arguments passed to the VM
507 // and preserve the order that the VM processes.
508 char* args = NEW_RESOURCE_ARRAY(char, length);
509 args[0] = '\0';
510 // concatenate all jvm_flags
511 if (num_flags > 0) {
512 strcat(args, vm_flags[0]);
513 for (i = 1; i < num_flags; i++) {
514 strcat(args, " ");
515 strcat(args, vm_flags[i]);
516 }
517 }
518
519 if (num_args > 0 && num_flags > 0) {
520 // append a space if args already contains one or more jvm_flags
521 strcat(args, " ");
522 }
523
524 // concatenate all jvm_args
525 if (num_args > 0) {
526 strcat(args, vm_args[0]);
527 for (i = 1; i < num_args; i++) {
528 strcat(args, " ");
529 strcat(args, vm_args[i]);
530 }
531 }
532
533 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
534 return JNIHandles::make_local(env, hargs());
535 JVM_END
536
537 // Returns an array of java.lang.String object containing the input arguments to the VM.
538 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
539 ResourceMark rm(THREAD);
540
541 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
542 return NULL;
543 }
544
545 char** vm_flags = Arguments::jvm_flags_array();
546 char** vm_args = Arguments::jvm_args_array();
547 int num_flags = Arguments::num_jvm_flags();
548 int num_args = Arguments::num_jvm_args();
549
550 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass());
551 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
552 objArrayHandle result_h(THREAD, r);
553
554 int index = 0;
555 for (int j = 0; j < num_flags; j++, index++) {
556 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
557 result_h->obj_at_put(index, h());
558 }
559 for (int i = 0; i < num_args; i++, index++) {
560 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
561 result_h->obj_at_put(index, h());
562 }
563 return (jobjectArray) JNIHandles::make_local(env, result_h());
564 JVM_END
565
566 // Returns an array of java/lang/management/MemoryPoolMXBean object
567 // one for each memory pool if obj == null; otherwise returns
568 // an array of memory pools for a given memory manager if
569 // it is a valid memory manager.
570 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
571 ResourceMark rm(THREAD);
572
573 int num_memory_pools;
574 MemoryManager* mgr = NULL;
575 if (obj == NULL) {
576 num_memory_pools = MemoryService::num_memory_pools();
577 } else {
578 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
579 if (mgr == NULL) {
580 return NULL;
581 }
582 num_memory_pools = mgr->num_memory_pools();
583 }
584
585 // Allocate the resulting MemoryPoolMXBean[] object
586 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
587 instanceKlassHandle ik (THREAD, k);
588 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
589 objArrayHandle poolArray(THREAD, r);
590
591 if (mgr == NULL) {
592 // Get all memory pools
593 for (int i = 0; i < num_memory_pools; i++) {
594 MemoryPool* pool = MemoryService::get_memory_pool(i);
595 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
596 instanceHandle ph(THREAD, p);
597 poolArray->obj_at_put(i, ph());
598 }
599 } else {
600 // Get memory pools managed by a given memory manager
601 for (int i = 0; i < num_memory_pools; i++) {
602 MemoryPool* pool = mgr->get_memory_pool(i);
603 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
604 instanceHandle ph(THREAD, p);
605 poolArray->obj_at_put(i, ph());
606 }
607 }
608 return (jobjectArray) JNIHandles::make_local(env, poolArray());
609 JVM_END
610
611 // Returns an array of java/lang/management/MemoryManagerMXBean object
612 // one for each memory manager if obj == null; otherwise returns
613 // an array of memory managers for a given memory pool if
614 // it is a valid memory pool.
615 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
616 ResourceMark rm(THREAD);
617
618 int num_mgrs;
619 MemoryPool* pool = NULL;
620 if (obj == NULL) {
621 num_mgrs = MemoryService::num_memory_managers();
622 } else {
623 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
624 if (pool == NULL) {
625 return NULL;
626 }
627 num_mgrs = pool->num_memory_managers();
628 }
629
630 // Allocate the resulting MemoryManagerMXBean[] object
631 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
632 instanceKlassHandle ik (THREAD, k);
633 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
634 objArrayHandle mgrArray(THREAD, r);
635
636 if (pool == NULL) {
637 // Get all memory managers
638 for (int i = 0; i < num_mgrs; i++) {
639 MemoryManager* mgr = MemoryService::get_memory_manager(i);
640 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
641 instanceHandle ph(THREAD, p);
642 mgrArray->obj_at_put(i, ph());
643 }
644 } else {
645 // Get memory managers for a given memory pool
646 for (int i = 0; i < num_mgrs; i++) {
647 MemoryManager* mgr = pool->get_memory_manager(i);
648 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
649 instanceHandle ph(THREAD, p);
650 mgrArray->obj_at_put(i, ph());
651 }
652 }
653 return (jobjectArray) JNIHandles::make_local(env, mgrArray());
654 JVM_END
655
656
657 // Returns a java/lang/management/MemoryUsage object containing the memory usage
658 // of a given memory pool.
659 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
660 ResourceMark rm(THREAD);
661
662 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
663 if (pool != NULL) {
664 MemoryUsage usage = pool->get_memory_usage();
665 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
666 return JNIHandles::make_local(env, h());
667 } else {
668 return NULL;
669 }
670 JVM_END
671
672 // Returns a java/lang/management/MemoryUsage object containing the memory usage
673 // of a given memory pool.
674 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
675 ResourceMark rm(THREAD);
676
677 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
678 if (pool != NULL) {
679 MemoryUsage usage = pool->get_peak_memory_usage();
680 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
681 return JNIHandles::make_local(env, h());
682 } else {
683 return NULL;
684 }
685 JVM_END
686
687 // Returns a java/lang/management/MemoryUsage object containing the memory usage
688 // of a given memory pool after most recent GC.
689 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
690 ResourceMark rm(THREAD);
691
692 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
693 if (pool != NULL && pool->is_collected_pool()) {
694 MemoryUsage usage = pool->get_last_collection_usage();
695 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
696 return JNIHandles::make_local(env, h());
697 } else {
698 return NULL;
699 }
700 JVM_END
701
702 // Sets the memory pool sensor for a threshold type
703 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
704 if (obj == NULL || sensorObj == NULL) {
705 THROW(vmSymbols::java_lang_NullPointerException());
706 }
707
708 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
709 oop s = JNIHandles::resolve(sensorObj);
710 assert(s->is_instance(), "Sensor should be an instanceOop");
711 instanceHandle sensor_h(THREAD, (instanceOop) s);
712 if (!sensor_h->is_a(sensor_klass)) {
713 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
714 "Sensor is not an instance of sun.management.Sensor class");
715 }
716
717 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
718 assert(mpool != NULL, "MemoryPool should exist");
719
720 switch (type) {
721 case JMM_USAGE_THRESHOLD_HIGH:
722 case JMM_USAGE_THRESHOLD_LOW:
723 // have only one sensor for threshold high and low
724 mpool->set_usage_sensor_obj(sensor_h);
725 break;
726 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
727 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
728 // have only one sensor for threshold high and low
729 mpool->set_gc_usage_sensor_obj(sensor_h);
730 break;
731 default:
732 assert(false, "Unrecognized type");
733 }
734
735 JVM_END
736
737
738 // Sets the threshold of a given memory pool.
739 // Returns the previous threshold.
740 //
741 // Input parameters:
742 // pool - the MemoryPoolMXBean object
743 // type - threshold type
744 // threshold - the new threshold (must not be negative)
745 //
746 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
747 if (threshold < 0) {
748 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
749 "Invalid threshold value",
750 -1);
751 }
752
753 if ((size_t)threshold > max_uintx) {
754 stringStream st;
755 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx);
756 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
757 }
758
759 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
760 assert(pool != NULL, "MemoryPool should exist");
761
762 jlong prev = 0;
763 switch (type) {
764 case JMM_USAGE_THRESHOLD_HIGH:
765 if (!pool->usage_threshold()->is_high_threshold_supported()) {
766 return -1;
767 }
768 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
769 break;
770
771 case JMM_USAGE_THRESHOLD_LOW:
772 if (!pool->usage_threshold()->is_low_threshold_supported()) {
773 return -1;
774 }
775 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
776 break;
777
778 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
779 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
780 return -1;
781 }
782 // return and the new threshold is effective for the next GC
783 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
784
785 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
786 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
787 return -1;
788 }
789 // return and the new threshold is effective for the next GC
790 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
791
792 default:
793 assert(false, "Unrecognized type");
794 return -1;
795 }
796
797 // When the threshold is changed, reevaluate if the low memory
798 // detection is enabled.
799 if (prev != threshold) {
800 LowMemoryDetector::recompute_enabled_for_collected_pools();
801 LowMemoryDetector::detect_low_memory(pool);
802 }
803 return prev;
804 JVM_END
805
806 // Returns a java/lang/management/MemoryUsage object representing
807 // the memory usage for the heap or non-heap memory.
808 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
809 ResourceMark rm(THREAD);
810
811 // Calculate the memory usage
812 size_t total_init = 0;
813 size_t total_used = 0;
814 size_t total_committed = 0;
815 size_t total_max = 0;
816 bool has_undefined_init_size = false;
817 bool has_undefined_max_size = false;
818
819 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
820 MemoryPool* pool = MemoryService::get_memory_pool(i);
821 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
822 MemoryUsage u = pool->get_memory_usage();
823 total_used += u.used();
824 total_committed += u.committed();
825
826 if (u.init_size() == (size_t)-1) {
827 has_undefined_init_size = true;
828 }
829 if (!has_undefined_init_size) {
830 total_init += u.init_size();
831 }
832
833 if (u.max_size() == (size_t)-1) {
834 has_undefined_max_size = true;
835 }
836 if (!has_undefined_max_size) {
837 total_max += u.max_size();
838 }
839 }
840 }
841
842 // if any one of the memory pool has undefined init_size or max_size,
843 // set it to -1
844 if (has_undefined_init_size) {
845 total_init = (size_t)-1;
846 }
847 if (has_undefined_max_size) {
848 total_max = (size_t)-1;
849 }
850
851 MemoryUsage usage((heap ? InitialHeapSize : total_init),
852 total_used,
853 total_committed,
854 (heap ? Universe::heap()->max_capacity() : total_max));
855
856 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
857 return JNIHandles::make_local(env, obj());
858 JVM_END
859
860 // Returns the boolean value of a given attribute.
861 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
862 switch (att) {
863 case JMM_VERBOSE_GC:
864 return MemoryService::get_verbose();
865 case JMM_VERBOSE_CLASS:
866 return ClassLoadingService::get_verbose();
867 case JMM_THREAD_CONTENTION_MONITORING:
868 return ThreadService::is_thread_monitoring_contention();
869 case JMM_THREAD_CPU_TIME:
870 return ThreadService::is_thread_cpu_time_enabled();
871 case JMM_THREAD_ALLOCATED_MEMORY:
872 return ThreadService::is_thread_allocated_memory_enabled();
873 default:
874 assert(0, "Unrecognized attribute");
875 return false;
876 }
877 JVM_END
878
879 // Sets the given boolean attribute and returns the previous value.
880 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
881 switch (att) {
882 case JMM_VERBOSE_GC:
883 return MemoryService::set_verbose(flag != 0);
884 case JMM_VERBOSE_CLASS:
885 return ClassLoadingService::set_verbose(flag != 0);
886 case JMM_THREAD_CONTENTION_MONITORING:
887 return ThreadService::set_thread_monitoring_contention(flag != 0);
888 case JMM_THREAD_CPU_TIME:
889 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
890 case JMM_THREAD_ALLOCATED_MEMORY:
891 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
892 default:
893 assert(0, "Unrecognized attribute");
894 return false;
895 }
896 JVM_END
897
898
899 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
900 switch (att) {
901 case JMM_GC_TIME_MS:
902 return mgr->gc_time_ms();
903
904 case JMM_GC_COUNT:
905 return mgr->gc_count();
906
907 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
908 // current implementation only has 1 ext attribute
909 return 1;
910
911 default:
912 assert(0, "Unrecognized GC attribute");
913 return -1;
914 }
915 }
916
917 class VmThreadCountClosure: public ThreadClosure {
918 private:
919 int _count;
920 public:
921 VmThreadCountClosure() : _count(0) {};
922 void do_thread(Thread* thread);
923 int count() { return _count; }
924 };
925
926 void VmThreadCountClosure::do_thread(Thread* thread) {
927 // exclude externally visible JavaThreads
928 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
929 return;
930 }
931
932 _count++;
933 }
934
935 static jint get_vm_thread_count() {
936 VmThreadCountClosure vmtcc;
937 {
938 MutexLockerEx ml(Threads_lock);
939 Threads::threads_do(&vmtcc);
940 }
941
942 return vmtcc.count();
943 }
944
945 static jint get_num_flags() {
946 // last flag entry is always NULL, so subtract 1
947 int nFlags = (int) Flag::numFlags - 1;
948 int count = 0;
949 for (int i = 0; i < nFlags; i++) {
950 Flag* flag = &Flag::flags[i];
951 // Exclude the locked (diagnostic, experimental) flags
952 if (flag->is_unlocked() || flag->is_unlocker()) {
953 count++;
954 }
955 }
956 return count;
957 }
958
959 static jlong get_long_attribute(jmmLongAttribute att) {
960 switch (att) {
961 case JMM_CLASS_LOADED_COUNT:
962 return ClassLoadingService::loaded_class_count();
963
964 case JMM_CLASS_UNLOADED_COUNT:
965 return ClassLoadingService::unloaded_class_count();
966
967 case JMM_THREAD_TOTAL_COUNT:
968 return ThreadService::get_total_thread_count();
969
970 case JMM_THREAD_LIVE_COUNT:
971 return ThreadService::get_live_thread_count();
972
973 case JMM_THREAD_PEAK_COUNT:
974 return ThreadService::get_peak_thread_count();
975
976 case JMM_THREAD_DAEMON_COUNT:
977 return ThreadService::get_daemon_thread_count();
978
979 case JMM_JVM_INIT_DONE_TIME_MS:
980 return Management::vm_init_done_time();
981
982 case JMM_JVM_UPTIME_MS:
983 return Management::ticks_to_ms(os::elapsed_counter());
984
985 case JMM_COMPILE_TOTAL_TIME_MS:
986 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
987
988 case JMM_OS_PROCESS_ID:
989 return os::current_process_id();
990
991 // Hotspot-specific counters
992 case JMM_CLASS_LOADED_BYTES:
993 return ClassLoadingService::loaded_class_bytes();
994
995 case JMM_CLASS_UNLOADED_BYTES:
996 return ClassLoadingService::unloaded_class_bytes();
997
998 case JMM_SHARED_CLASS_LOADED_COUNT:
999 return ClassLoadingService::loaded_shared_class_count();
1000
1001 case JMM_SHARED_CLASS_UNLOADED_COUNT:
1002 return ClassLoadingService::unloaded_shared_class_count();
1003
1004
1005 case JMM_SHARED_CLASS_LOADED_BYTES:
1006 return ClassLoadingService::loaded_shared_class_bytes();
1007
1008 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1009 return ClassLoadingService::unloaded_shared_class_bytes();
1010
1011 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1012 return ClassLoader::classloader_time_ms();
1013
1014 case JMM_VM_GLOBAL_COUNT:
1015 return get_num_flags();
1016
1017 case JMM_SAFEPOINT_COUNT:
1018 return RuntimeService::safepoint_count();
1019
1020 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1021 return RuntimeService::safepoint_sync_time_ms();
1022
1023 case JMM_TOTAL_STOPPED_TIME_MS:
1024 return RuntimeService::safepoint_time_ms();
1025
1026 case JMM_TOTAL_APP_TIME_MS:
1027 return RuntimeService::application_time_ms();
1028
1029 case JMM_VM_THREAD_COUNT:
1030 return get_vm_thread_count();
1031
1032 case JMM_CLASS_INIT_TOTAL_COUNT:
1033 return ClassLoader::class_init_count();
1034
1035 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1036 return ClassLoader::class_init_time_ms();
1037
1038 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1039 return ClassLoader::class_verify_time_ms();
1040
1041 case JMM_METHOD_DATA_SIZE_BYTES:
1042 return ClassLoadingService::class_method_data_size();
1043
1044 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1045 return os::physical_memory();
1046
1047 default:
1048 return -1;
1049 }
1050 }
1051
1052
1053 // Returns the long value of a given attribute.
1054 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
1055 if (obj == NULL) {
1056 return get_long_attribute(att);
1057 } else {
1058 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
1059 if (mgr != NULL) {
1060 return get_gc_attribute(mgr, att);
1061 }
1062 }
1063 return -1;
1064 JVM_END
1065
1066 // Gets the value of all attributes specified in the given array
1067 // and sets the value in the result array.
1068 // Returns the number of attributes found.
1069 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1070 jobject obj,
1071 jmmLongAttribute* atts,
1072 jint count,
1073 jlong* result))
1074
1075 int num_atts = 0;
1076 if (obj == NULL) {
1077 for (int i = 0; i < count; i++) {
1078 result[i] = get_long_attribute(atts[i]);
1079 if (result[i] != -1) {
1080 num_atts++;
1081 }
1082 }
1083 } else {
1084 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1085 for (int i = 0; i < count; i++) {
1086 result[i] = get_gc_attribute(mgr, atts[i]);
1087 if (result[i] != -1) {
1088 num_atts++;
1089 }
1090 }
1091 }
1092 return num_atts;
1093 JVM_END
1094
1095 // Helper function to do thread dump for a specific list of threads
1096 static void do_thread_dump(ThreadDumpResult* dump_result,
1097 typeArrayHandle ids_ah, // array of thread ID (long[])
1098 int num_threads,
1099 int max_depth,
1100 bool with_locked_monitors,
1101 bool with_locked_synchronizers,
1102 TRAPS) {
1103
1104 // First get an array of threadObj handles.
1105 // A JavaThread may terminate before we get the stack trace.
1106 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1107 {
1108 MutexLockerEx ml(Threads_lock);
1109 for (int i = 0; i < num_threads; i++) {
1110 jlong tid = ids_ah->long_at(i);
1111 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1112 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
1113 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1114 thread_handle_array->append(threadObj_h);
1115 }
1116 }
1117
1118 // Obtain thread dumps and thread snapshot information
1119 VM_ThreadDump op(dump_result,
1120 thread_handle_array,
1121 num_threads,
1122 max_depth, /* stack depth */
1123 with_locked_monitors,
1124 with_locked_synchronizers);
1125 VMThread::execute(&op);
1126 }
1127
1128 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1129 // for the thread ID specified in the corresponding entry in
1130 // the given array of thread IDs; or NULL if the thread does not exist
1131 // or has terminated.
1132 //
1133 // Input parameters:
1134 // ids - array of thread IDs
1135 // maxDepth - the maximum depth of stack traces to be dumped:
1136 // maxDepth == -1 requests to dump entire stack trace.
1137 // maxDepth == 0 requests no stack trace.
1138 // infoArray - array of ThreadInfo objects
1139 //
1140 // QQQ - Why does this method return a value instead of void?
1141 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1142 // Check if threads is null
1143 if (ids == NULL || infoArray == NULL) {
1144 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1145 }
1146
1147 if (maxDepth < -1) {
1148 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1149 "Invalid maxDepth", -1);
1150 }
1151
1152 ResourceMark rm(THREAD);
1153 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1154 typeArrayHandle ids_ah(THREAD, ta);
1155
1156 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1157 objArrayOop oa = objArrayOop(infoArray_obj);
1158 objArrayHandle infoArray_h(THREAD, oa);
1159
1160 // validate the thread id array
1161 validate_thread_id_array(ids_ah, CHECK_0);
1162
1163 // validate the ThreadInfo[] parameters
1164 validate_thread_info_array(infoArray_h, CHECK_0);
1165
1166 // infoArray must be of the same length as the given array of thread IDs
1167 int num_threads = ids_ah->length();
1168 if (num_threads != infoArray_h->length()) {
1169 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1170 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1171 }
1172
1173 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1174 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1175
1176 // Must use ThreadDumpResult to store the ThreadSnapshot.
1177 // GC may occur after the thread snapshots are taken but before
1178 // this function returns. The threadObj and other oops kept
1179 // in the ThreadSnapshot are marked and adjusted during GC.
1180 ThreadDumpResult dump_result(num_threads);
1181
1182 if (maxDepth == 0) {
1183 // no stack trace dumped - do not need to stop the world
1184 {
1185 MutexLockerEx ml(Threads_lock);
1186 for (int i = 0; i < num_threads; i++) {
1187 jlong tid = ids_ah->long_at(i);
1188 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1189 ThreadSnapshot* ts;
1190 if (jt == NULL) {
1191 // if the thread does not exist or now it is terminated,
1192 // create dummy snapshot
1193 ts = new ThreadSnapshot();
1194 } else {
1195 ts = new ThreadSnapshot(jt);
1196 }
1197 dump_result.add_thread_snapshot(ts);
1198 }
1199 }
1200 } else {
1201 // obtain thread dump with the specific list of threads with stack trace
1202 do_thread_dump(&dump_result,
1203 ids_ah,
1204 num_threads,
1205 maxDepth,
1206 false, /* no locked monitor */
1207 false, /* no locked synchronizers */
1208 CHECK_0);
1209 }
1210
1211 int num_snapshots = dump_result.num_snapshots();
1212 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1213 int index = 0;
1214 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1215 // For each thread, create an java/lang/management/ThreadInfo object
1216 // and fill with the thread information
1217
1218 if (ts->threadObj() == NULL) {
1219 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1220 infoArray_h->obj_at_put(index, NULL);
1221 continue;
1222 }
1223
1224 // Create java.lang.management.ThreadInfo object
1225 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1226 infoArray_h->obj_at_put(index, info_obj);
1227 }
1228 return 0;
1229 JVM_END
1230
1231 // Dump thread info for the specified threads.
1232 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1233 // for the thread ID specified in the corresponding entry in
1234 // the given array of thread IDs; or NULL if the thread does not exist
1235 // or has terminated.
1236 //
1237 // Input parameter:
1238 // ids - array of thread IDs; NULL indicates all live threads
1239 // locked_monitors - if true, dump locked object monitors
1240 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1241 //
1242 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1243 ResourceMark rm(THREAD);
1244
1245 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1246 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1247
1248 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1249 int num_threads = (ta != NULL ? ta->length() : 0);
1250 typeArrayHandle ids_ah(THREAD, ta);
1251
1252 ThreadDumpResult dump_result(num_threads); // can safepoint
1253
1254 if (ids_ah() != NULL) {
1255
1256 // validate the thread id array
1257 validate_thread_id_array(ids_ah, CHECK_NULL);
1258
1259 // obtain thread dump of a specific list of threads
1260 do_thread_dump(&dump_result,
1261 ids_ah,
1262 num_threads,
1263 -1, /* entire stack */
1264 (locked_monitors ? true : false), /* with locked monitors */
1265 (locked_synchronizers ? true : false), /* with locked synchronizers */
1266 CHECK_NULL);
1267 } else {
1268 // obtain thread dump of all threads
1269 VM_ThreadDump op(&dump_result,
1270 -1, /* entire stack */
1271 (locked_monitors ? true : false), /* with locked monitors */
1272 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1273 VMThread::execute(&op);
1274 }
1275
1276 int num_snapshots = dump_result.num_snapshots();
1277
1278 // create the result ThreadInfo[] object
1279 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1280 instanceKlassHandle ik (THREAD, k);
1281 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1282 objArrayHandle result_h(THREAD, r);
1283
1284 int index = 0;
1285 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1286 if (ts->threadObj() == NULL) {
1287 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1288 result_h->obj_at_put(index, NULL);
1289 continue;
1290 }
1291
1292 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1293 assert(stacktrace != NULL, "Must have a stack trace dumped");
1294
1295 // Create Object[] filled with locked monitors
1296 // Create int[] filled with the stack depth where a monitor was locked
1297 int num_frames = stacktrace->get_stack_depth();
1298 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1299
1300 // Count the total number of locked monitors
1301 for (int i = 0; i < num_frames; i++) {
1302 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1303 num_locked_monitors += frame->num_locked_monitors();
1304 }
1305
1306 objArrayHandle monitors_array;
1307 typeArrayHandle depths_array;
1308 objArrayHandle synchronizers_array;
1309
1310 if (locked_monitors) {
1311 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1312 // where the thread locked it
1313 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1314 objArrayHandle mh(THREAD, array);
1315 monitors_array = mh;
1316
1317 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1318 typeArrayHandle dh(THREAD, tarray);
1319 depths_array = dh;
1320
1321 int count = 0;
1322 int j = 0;
1323 for (int depth = 0; depth < num_frames; depth++) {
1324 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1325 int len = frame->num_locked_monitors();
1326 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1327 for (j = 0; j < len; j++) {
1328 oop monitor = locked_monitors->at(j);
1329 assert(monitor != NULL, "must be a Java object");
1330 monitors_array->obj_at_put(count, monitor);
1331 depths_array->int_at_put(count, depth);
1332 count++;
1333 }
1334 }
1335
1336 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1337 for (j = 0; j < jni_locked_monitors->length(); j++) {
1338 oop object = jni_locked_monitors->at(j);
1339 assert(object != NULL, "must be a Java object");
1340 monitors_array->obj_at_put(count, object);
1341 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1342 depths_array->int_at_put(count, -1);
1343 count++;
1344 }
1345 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1346 }
1347
1348 if (locked_synchronizers) {
1349 // Create Object[] filled with locked JSR-166 synchronizers
1350 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1351 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1352 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1353 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1354
1355 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1356 objArrayHandle sh(THREAD, array);
1357 synchronizers_array = sh;
1358
1359 for (int k = 0; k < num_locked_synchronizers; k++) {
1360 synchronizers_array->obj_at_put(k, locks->at(k));
1361 }
1362 }
1363
1364 // Create java.lang.management.ThreadInfo object
1365 instanceOop info_obj = Management::create_thread_info_instance(ts,
1366 monitors_array,
1367 depths_array,
1368 synchronizers_array,
1369 CHECK_NULL);
1370 result_h->obj_at_put(index, info_obj);
1371 }
1372
1373 return (jobjectArray) JNIHandles::make_local(env, result_h());
1374 JVM_END
1375
1376 // Returns an array of Class objects.
1377 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1378 ResourceMark rm(THREAD);
1379
1380 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1381
1382 int num_classes = lce.num_loaded_classes();
1383 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1384 objArrayHandle classes_ah(THREAD, r);
1385
1386 for (int i = 0; i < num_classes; i++) {
1387 KlassHandle kh = lce.get_klass(i);
1388 oop mirror = kh()->java_mirror();
1389 classes_ah->obj_at_put(i, mirror);
1390 }
1391
1392 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1393 JVM_END
1394
1395 // Reset statistic. Return true if the requested statistic is reset.
1396 // Otherwise, return false.
1397 //
1398 // Input parameters:
1399 // obj - specify which instance the statistic associated with to be reset
1400 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1401 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1402 // type - the type of statistic to be reset
1403 //
1404 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1405 ResourceMark rm(THREAD);
1406
1407 switch (type) {
1408 case JMM_STAT_PEAK_THREAD_COUNT:
1409 ThreadService::reset_peak_thread_count();
1410 return true;
1411
1412 case JMM_STAT_THREAD_CONTENTION_COUNT:
1413 case JMM_STAT_THREAD_CONTENTION_TIME: {
1414 jlong tid = obj.j;
1415 if (tid < 0) {
1416 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1417 }
1418
1419 // Look for the JavaThread of this given tid
1420 MutexLockerEx ml(Threads_lock);
1421 if (tid == 0) {
1422 // reset contention statistics for all threads if tid == 0
1423 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1424 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1425 ThreadService::reset_contention_count_stat(java_thread);
1426 } else {
1427 ThreadService::reset_contention_time_stat(java_thread);
1428 }
1429 }
1430 } else {
1431 // reset contention statistics for a given thread
1432 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(tid);
1433 if (java_thread == NULL) {
1434 return false;
1435 }
1436
1437 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1438 ThreadService::reset_contention_count_stat(java_thread);
1439 } else {
1440 ThreadService::reset_contention_time_stat(java_thread);
1441 }
1442 }
1443 return true;
1444 break;
1445 }
1446 case JMM_STAT_PEAK_POOL_USAGE: {
1447 jobject o = obj.l;
1448 if (o == NULL) {
1449 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1450 }
1451
1452 oop pool_obj = JNIHandles::resolve(o);
1453 assert(pool_obj->is_instance(), "Should be an instanceOop");
1454 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1455
1456 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1457 if (pool != NULL) {
1458 pool->reset_peak_memory_usage();
1459 return true;
1460 }
1461 break;
1462 }
1463 case JMM_STAT_GC_STAT: {
1464 jobject o = obj.l;
1465 if (o == NULL) {
1466 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1467 }
1468
1469 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1470 if (mgr != NULL) {
1471 mgr->reset_gc_stat();
1472 return true;
1473 }
1474 break;
1475 }
1476 default:
1477 assert(0, "Unknown Statistic Type");
1478 }
1479 return false;
1480 JVM_END
1481
1482 // Returns the fast estimate of CPU time consumed by
1483 // a given thread (in nanoseconds).
1484 // If thread_id == 0, return CPU time for the current thread.
1485 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1486 if (!os::is_thread_cpu_time_supported()) {
1487 return -1;
1488 }
1489
1490 if (thread_id < 0) {
1491 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1492 "Invalid thread ID", -1);
1493 }
1494
1495 JavaThread* java_thread = NULL;
1496 if (thread_id == 0) {
1497 // current thread
1498 return os::current_thread_cpu_time();
1499 } else {
1500 MutexLockerEx ml(Threads_lock);
1501 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
1502 if (java_thread != NULL) {
1503 return os::thread_cpu_time((Thread*) java_thread);
1504 }
1505 }
1506 return -1;
1507 JVM_END
1508
1509 // Returns a String array of all VM global flag names
1510 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1511 // last flag entry is always NULL, so subtract 1
1512 int nFlags = (int) Flag::numFlags - 1;
1513 // allocate a temp array
1514 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1515 nFlags, CHECK_0);
1516 objArrayHandle flags_ah(THREAD, r);
1517 int num_entries = 0;
1518 for (int i = 0; i < nFlags; i++) {
1519 Flag* flag = &Flag::flags[i];
1520 // Exclude notproduct and develop flags in product builds.
1521 if (flag->is_constant_in_binary()) {
1522 continue;
1523 }
1524 // Exclude the locked (experimental, diagnostic) flags
1525 if (flag->is_unlocked() || flag->is_unlocker()) {
1526 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0);
1527 flags_ah->obj_at_put(num_entries, s());
1528 num_entries++;
1529 }
1530 }
1531
1532 if (num_entries < nFlags) {
1533 // Return array of right length
1534 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1535 for(int i = 0; i < num_entries; i++) {
1536 res->obj_at_put(i, flags_ah->obj_at(i));
1537 }
1538 return (jobjectArray)JNIHandles::make_local(env, res);
1539 }
1540
1541 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1542 JVM_END
1543
1544 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1545 // can't be determined, true otherwise. If false is returned, then *global
1546 // will be incomplete and invalid.
1547 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1548 Handle flag_name;
1549 if (name() == NULL) {
1550 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false);
1551 } else {
1552 flag_name = name;
1553 }
1554 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1555
1556 if (flag->is_bool()) {
1557 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1558 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1559 } else if (flag->is_intx()) {
1560 global->value.j = (jlong)flag->get_intx();
1561 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1562 } else if (flag->is_uintx()) {
1563 global->value.j = (jlong)flag->get_uintx();
1564 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1565 } else if (flag->is_uint64_t()) {
1566 global->value.j = (jlong)flag->get_uint64_t();
1567 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1568 } else if (flag->is_double()) {
1569 global->value.d = (jdouble)flag->get_double();
1570 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE;
1571 } else if (flag->is_size_t()) {
1572 global->value.j = (jlong)flag->get_size_t();
1573 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1574 } else if (flag->is_ccstr()) {
1575 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1576 global->value.l = (jobject)JNIHandles::make_local(env, str());
1577 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1578 } else {
1579 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1580 return false;
1581 }
1582
1583 global->writeable = flag->is_writeable();
1584 global->external = flag->is_external();
1585 switch (flag->get_origin()) {
1586 case Flag::DEFAULT:
1587 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1588 break;
1589 case Flag::COMMAND_LINE:
1590 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1591 break;
1592 case Flag::ENVIRON_VAR:
1593 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1594 break;
1595 case Flag::CONFIG_FILE:
1596 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1597 break;
1598 case Flag::MANAGEMENT:
1599 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1600 break;
1601 case Flag::ERGONOMIC:
1602 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1603 break;
1604 case Flag::ATTACH_ON_DEMAND:
1605 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND;
1606 break;
1607 default:
1608 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1609 }
1610
1611 return true;
1612 }
1613
1614 // Fill globals array of count length with jmmVMGlobal entries
1615 // specified by names. If names == NULL, fill globals array
1616 // with all Flags. Return value is number of entries
1617 // created in globals.
1618 // If a Flag with a given name in an array element does not
1619 // exist, globals[i].name will be set to NULL.
1620 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1621 jobjectArray names,
1622 jmmVMGlobal *globals,
1623 jint count))
1624
1625
1626 if (globals == NULL) {
1627 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1628 }
1629
1630 ResourceMark rm(THREAD);
1631
1632 if (names != NULL) {
1633 // return the requested globals
1634 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1635 objArrayHandle names_ah(THREAD, ta);
1636 // Make sure we have a String array
1637 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1638 if (element_klass != SystemDictionary::String_klass()) {
1639 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1640 "Array element type is not String class", 0);
1641 }
1642
1643 int names_length = names_ah->length();
1644 int num_entries = 0;
1645 for (int i = 0; i < names_length && i < count; i++) {
1646 oop s = names_ah->obj_at(i);
1647 if (s == NULL) {
1648 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1649 }
1650
1651 Handle sh(THREAD, s);
1652 char* str = java_lang_String::as_utf8_string(s);
1653 Flag* flag = Flag::find_flag(str, strlen(str));
1654 if (flag != NULL &&
1655 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1656 num_entries++;
1657 } else {
1658 globals[i].name = NULL;
1659 }
1660 }
1661 return num_entries;
1662 } else {
1663 // return all globals if names == NULL
1664
1665 // last flag entry is always NULL, so subtract 1
1666 int nFlags = (int) Flag::numFlags - 1;
1667 Handle null_h;
1668 int num_entries = 0;
1669 for (int i = 0; i < nFlags && num_entries < count; i++) {
1670 Flag* flag = &Flag::flags[i];
1671 // Exclude notproduct and develop flags in product builds.
1672 if (flag->is_constant_in_binary()) {
1673 continue;
1674 }
1675 // Exclude the locked (diagnostic, experimental) flags
1676 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1677 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1678 num_entries++;
1679 }
1680 }
1681 return num_entries;
1682 }
1683 JVM_END
1684
1685 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1686 ResourceMark rm(THREAD);
1687
1688 oop fn = JNIHandles::resolve_external_guard(flag_name);
1689 if (fn == NULL) {
1690 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1691 "The flag name cannot be null.");
1692 }
1693 char* name = java_lang_String::as_utf8_string(fn);
1694
1695 FormatBuffer<80> err_msg("%s", "");
1696 int succeed = WriteableFlags::set_flag(name, new_value, Flag::MANAGEMENT, err_msg);
1697
1698 if (succeed != WriteableFlags::SUCCESS) {
1699 if (succeed == WriteableFlags::MISSING_VALUE) {
1700 // missing value causes NPE to be thrown
1701 THROW(vmSymbols::java_lang_NullPointerException());
1702 } else {
1703 // all the other errors are reported as IAE with the appropriate error message
1704 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1705 err_msg.buffer());
1706 }
1707 }
1708 assert(succeed == WriteableFlags::SUCCESS, "Setting flag should succeed");
1709 JVM_END
1710
1711 class ThreadTimesClosure: public ThreadClosure {
1712 private:
1713 objArrayHandle _names_strings;
1714 char **_names_chars;
1715 typeArrayHandle _times;
1716 int _names_len;
1717 int _times_len;
1718 int _count;
1719
1720 public:
1721 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1722 ~ThreadTimesClosure();
1723 virtual void do_thread(Thread* thread);
1724 void do_unlocked();
1725 int count() { return _count; }
1726 };
1727
1728 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1729 typeArrayHandle times) {
1730 assert(names() != NULL, "names was NULL");
1731 assert(times() != NULL, "times was NULL");
1732 _names_strings = names;
1733 _names_len = names->length();
1734 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1735 _times = times;
1736 _times_len = times->length();
1737 _count = 0;
1738 }
1739
1740 //
1741 // Called with Threads_lock held
1742 //
1743 void ThreadTimesClosure::do_thread(Thread* thread) {
1744 assert(thread != NULL, "thread was NULL");
1745
1746 // exclude externally visible JavaThreads
1747 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1748 return;
1749 }
1750
1751 if (_count >= _names_len || _count >= _times_len) {
1752 // skip if the result array is not big enough
1753 return;
1754 }
1755
1756 EXCEPTION_MARK;
1757 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1758
1759 assert(thread->name() != NULL, "All threads should have a name");
1760 _names_chars[_count] = os::strdup(thread->name());
1761 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1762 os::thread_cpu_time(thread) : -1);
1763 _count++;
1764 }
1765
1766 // Called without Threads_lock, we can allocate String objects.
1767 void ThreadTimesClosure::do_unlocked() {
1768
1769 EXCEPTION_MARK;
1770 for (int i = 0; i < _count; i++) {
1771 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1772 _names_strings->obj_at_put(i, s());
1773 }
1774 }
1775
1776 ThreadTimesClosure::~ThreadTimesClosure() {
1777 for (int i = 0; i < _count; i++) {
1778 os::free(_names_chars[i]);
1779 }
1780 FREE_C_HEAP_ARRAY(char *, _names_chars);
1781 }
1782
1783 // Fills names with VM internal thread names and times with the corresponding
1784 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1785 // If the element type of names is not String, an IllegalArgumentException is
1786 // thrown.
1787 // If an array is not large enough to hold all the entries, only the entries
1788 // that fit will be returned. Return value is the number of VM internal
1789 // threads entries.
1790 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1791 jobjectArray names,
1792 jlongArray times))
1793 if (names == NULL || times == NULL) {
1794 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1795 }
1796 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1797 objArrayHandle names_ah(THREAD, na);
1798
1799 // Make sure we have a String array
1800 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1801 if (element_klass != SystemDictionary::String_klass()) {
1802 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1803 "Array element type is not String class", 0);
1804 }
1805
1806 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1807 typeArrayHandle times_ah(THREAD, ta);
1808
1809 ThreadTimesClosure ttc(names_ah, times_ah);
1810 {
1811 MutexLockerEx ml(Threads_lock);
1812 Threads::threads_do(&ttc);
1813 }
1814 ttc.do_unlocked();
1815 return ttc.count();
1816 JVM_END
1817
1818 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1819 ResourceMark rm(THREAD);
1820
1821 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1822 VMThread::execute(&op);
1823
1824 DeadlockCycle* deadlocks = op.result();
1825 if (deadlocks == NULL) {
1826 // no deadlock found and return
1827 return Handle();
1828 }
1829
1830 int num_threads = 0;
1831 DeadlockCycle* cycle;
1832 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1833 num_threads += cycle->num_threads();
1834 }
1835
1836 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1837 objArrayHandle threads_ah(THREAD, r);
1838
1839 int index = 0;
1840 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1841 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1842 int len = deadlock_threads->length();
1843 for (int i = 0; i < len; i++) {
1844 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1845 index++;
1846 }
1847 }
1848 return threads_ah;
1849 }
1850
1851 // Finds cycles of threads that are deadlocked involved in object monitors
1852 // and JSR-166 synchronizers.
1853 // Returns an array of Thread objects which are in deadlock, if any.
1854 // Otherwise, returns NULL.
1855 //
1856 // Input parameter:
1857 // object_monitors_only - if true, only check object monitors
1858 //
1859 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1860 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
1861 return (jobjectArray) JNIHandles::make_local(env, result());
1862 JVM_END
1863
1864 // Finds cycles of threads that are deadlocked on monitor locks
1865 // Returns an array of Thread objects which are in deadlock, if any.
1866 // Otherwise, returns NULL.
1867 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1868 Handle result = find_deadlocks(true, CHECK_0);
1869 return (jobjectArray) JNIHandles::make_local(env, result());
1870 JVM_END
1871
1872 // Gets the information about GC extension attributes including
1873 // the name of the attribute, its type, and a short description.
1874 //
1875 // Input parameters:
1876 // mgr - GC memory manager
1877 // info - caller allocated array of jmmExtAttributeInfo
1878 // count - number of elements of the info array
1879 //
1880 // Returns the number of GC extension attributes filled in the info array; or
1881 // -1 if info is not big enough
1882 //
1883 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1884 // All GC memory managers have 1 attribute (number of GC threads)
1885 if (count == 0) {
1886 return 0;
1887 }
1888
1889 if (info == NULL) {
1890 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1891 }
1892
1893 info[0].name = "GcThreadCount";
1894 info[0].type = 'I';
1895 info[0].description = "Number of GC threads";
1896 return 1;
1897 JVM_END
1898
1899 // verify the given array is an array of java/lang/management/MemoryUsage objects
1900 // of a given length and return the objArrayOop
1901 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1902 if (array == NULL) {
1903 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1904 }
1905
1906 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1907 objArrayHandle array_h(THREAD, oa);
1908
1909 // array must be of the given length
1910 if (length != array_h->length()) {
1911 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1912 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
1913 }
1914
1915 // check if the element of array is of type MemoryUsage class
1916 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
1917 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1918 if (element_klass != usage_klass) {
1919 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1920 "The element type is not MemoryUsage class", 0);
1921 }
1922
1923 return array_h();
1924 }
1925
1926 // Gets the statistics of the last GC of a given GC memory manager.
1927 // Input parameters:
1928 // obj - GarbageCollectorMXBean object
1929 // gc_stat - caller allocated jmmGCStat where:
1930 // a. before_gc_usage - array of MemoryUsage objects
1931 // b. after_gc_usage - array of MemoryUsage objects
1932 // c. gc_ext_attributes_values_size is set to the
1933 // gc_ext_attribute_values array allocated
1934 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1935 //
1936 // On return,
1937 // gc_index == 0 indicates no GC statistics available
1938 //
1939 // before_gc_usage and after_gc_usage - filled with per memory pool
1940 // before and after GC usage in the same order as the memory pools
1941 // returned by GetMemoryPools for a given GC memory manager.
1942 // num_gc_ext_attributes indicates the number of elements in
1943 // the gc_ext_attribute_values array is filled; or
1944 // -1 if the gc_ext_attributes_values array is not big enough
1945 //
1946 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1947 ResourceMark rm(THREAD);
1948
1949 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
1950 THROW(vmSymbols::java_lang_NullPointerException());
1951 }
1952
1953 // Get the GCMemoryManager
1954 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1955
1956 // Make a copy of the last GC statistics
1957 // GC may occur while constructing the last GC information
1958 int num_pools = MemoryService::num_memory_pools();
1959 GCStatInfo stat(num_pools);
1960 if (mgr->get_last_gc_stat(&stat) == 0) {
1961 gc_stat->gc_index = 0;
1962 return;
1963 }
1964
1965 gc_stat->gc_index = stat.gc_index();
1966 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
1967 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
1968
1969 // Current implementation does not have GC extension attributes
1970 gc_stat->num_gc_ext_attributes = 0;
1971
1972 // Fill the arrays of MemoryUsage objects with before and after GC
1973 // per pool memory usage
1974 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
1975 num_pools,
1976 CHECK);
1977 objArrayHandle usage_before_gc_ah(THREAD, bu);
1978
1979 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
1980 num_pools,
1981 CHECK);
1982 objArrayHandle usage_after_gc_ah(THREAD, au);
1983
1984 for (int i = 0; i < num_pools; i++) {
1985 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
1986 Handle after_usage;
1987
1988 MemoryUsage u = stat.after_gc_usage_for_pool(i);
1989 if (u.max_size() == 0 && u.used() > 0) {
1990 // If max size == 0, this pool is a survivor space.
1991 // Set max size = -1 since the pools will be swapped after GC.
1992 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
1993 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
1994 } else {
1995 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
1996 }
1997 usage_before_gc_ah->obj_at_put(i, before_usage());
1998 usage_after_gc_ah->obj_at_put(i, after_usage());
1999 }
2000
2001 if (gc_stat->gc_ext_attribute_values_size > 0) {
2002 // Current implementation only has 1 attribute (number of GC threads)
2003 // The type is 'I'
2004 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2005 }
2006 JVM_END
2007
2008 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2009 ResourceMark rm(THREAD);
2010 // Get the GCMemoryManager
2011 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2012 mgr->set_notification_enabled(enabled?true:false);
2013 JVM_END
2014
2015 // Dump heap - Returns 0 if succeeds.
2016 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2017 #if INCLUDE_SERVICES
2018 ResourceMark rm(THREAD);
2019 oop on = JNIHandles::resolve_external_guard(outputfile);
2020 if (on == NULL) {
2021 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2022 "Output file name cannot be null.", -1);
2023 }
2024 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1));
2025 if (name == NULL) {
2026 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2027 "Output file name cannot be null.", -1);
2028 }
2029 HeapDumper dumper(live ? true : false);
2030 if (dumper.dump(name) != 0) {
2031 const char* errmsg = dumper.error_as_C_string();
2032 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2033 }
2034 return 0;
2035 #else // INCLUDE_SERVICES
2036 return -1;
2037 #endif // INCLUDE_SERVICES
2038 JVM_END
2039
2040 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2041 ResourceMark rm(THREAD);
2042 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2043 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2044 dcmd_list->length(), CHECK_NULL);
2045 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2046 for (int i = 0; i < dcmd_list->length(); i++) {
2047 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2048 cmd_array->obj_at_put(i, cmd_name);
2049 }
2050 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2051 JVM_END
2052
2053 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2054 dcmdInfo* infoArray))
2055 if (cmds == NULL || infoArray == NULL) {
2056 THROW(vmSymbols::java_lang_NullPointerException());
2057 }
2058
2059 ResourceMark rm(THREAD);
2060
2061 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2062 objArrayHandle cmds_ah(THREAD, ca);
2063
2064 // Make sure we have a String array
2065 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2066 if (element_klass != SystemDictionary::String_klass()) {
2067 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2068 "Array element type is not String class");
2069 }
2070
2071 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2072
2073 int num_cmds = cmds_ah->length();
2074 for (int i = 0; i < num_cmds; i++) {
2075 oop cmd = cmds_ah->obj_at(i);
2076 if (cmd == NULL) {
2077 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2078 "Command name cannot be null.");
2079 }
2080 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2081 if (cmd_name == NULL) {
2082 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2083 "Command name cannot be null.");
2084 }
2085 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2086 if (pos == -1) {
2087 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2088 "Unknown diagnostic command");
2089 }
2090 DCmdInfo* info = info_list->at(pos);
2091 infoArray[i].name = info->name();
2092 infoArray[i].description = info->description();
2093 infoArray[i].impact = info->impact();
2094 JavaPermission p = info->permission();
2095 infoArray[i].permission_class = p._class;
2096 infoArray[i].permission_name = p._name;
2097 infoArray[i].permission_action = p._action;
2098 infoArray[i].num_arguments = info->num_arguments();
2099 infoArray[i].enabled = info->is_enabled();
2100 }
2101 JVM_END
2102
2103 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2104 jstring command, dcmdArgInfo* infoArray))
2105 ResourceMark rm(THREAD);
2106 oop cmd = JNIHandles::resolve_external_guard(command);
2107 if (cmd == NULL) {
2108 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2109 "Command line cannot be null.");
2110 }
2111 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2112 if (cmd_name == NULL) {
2113 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2114 "Command line content cannot be null.");
2115 }
2116 DCmd* dcmd = NULL;
2117 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2118 strlen(cmd_name));
2119 if (factory != NULL) {
2120 dcmd = factory->create_resource_instance(NULL);
2121 }
2122 if (dcmd == NULL) {
2123 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2124 "Unknown diagnostic command");
2125 }
2126 DCmdMark mark(dcmd);
2127 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2128 if (array->length() == 0) {
2129 return;
2130 }
2131 for (int i = 0; i < array->length(); i++) {
2132 infoArray[i].name = array->at(i)->name();
2133 infoArray[i].description = array->at(i)->description();
2134 infoArray[i].type = array->at(i)->type();
2135 infoArray[i].default_string = array->at(i)->default_string();
2136 infoArray[i].mandatory = array->at(i)->is_mandatory();
2137 infoArray[i].option = array->at(i)->is_option();
2138 infoArray[i].multiple = array->at(i)->is_multiple();
2139 infoArray[i].position = array->at(i)->position();
2140 }
2141 return;
2142 JVM_END
2143
2144 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2145 ResourceMark rm(THREAD);
2146 oop cmd = JNIHandles::resolve_external_guard(commandline);
2147 if (cmd == NULL) {
2148 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2149 "Command line cannot be null.");
2150 }
2151 char* cmdline = java_lang_String::as_utf8_string(cmd);
2152 if (cmdline == NULL) {
2153 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2154 "Command line content cannot be null.");
2155 }
2156 bufferedStream output;
2157 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2158 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2159 return (jstring) JNIHandles::make_local(env, result);
2160 JVM_END
2161
2162 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2163 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2164 JVM_END
2165
2166 jlong Management::ticks_to_ms(jlong ticks) {
2167 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2168 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2169 * (double)1000.0);
2170 }
2171 #endif // INCLUDE_MANAGEMENT
2172
2173 // Gets an array containing the amount of memory allocated on the Java
2174 // heap for a set of threads (in bytes). Each element of the array is
2175 // the amount of memory allocated for the thread ID specified in the
2176 // corresponding entry in the given array of thread IDs; or -1 if the
2177 // thread does not exist or has terminated.
2178 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2179 jlongArray sizeArray))
2180 // Check if threads is null
2181 if (ids == NULL || sizeArray == NULL) {
2182 THROW(vmSymbols::java_lang_NullPointerException());
2183 }
2184
2185 ResourceMark rm(THREAD);
2186 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2187 typeArrayHandle ids_ah(THREAD, ta);
2188
2189 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2190 typeArrayHandle sizeArray_h(THREAD, sa);
2191
2192 // validate the thread id array
2193 validate_thread_id_array(ids_ah, CHECK);
2194
2195 // sizeArray must be of the same length as the given array of thread IDs
2196 int num_threads = ids_ah->length();
2197 if (num_threads != sizeArray_h->length()) {
2198 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2199 "The length of the given long array does not match the length of "
2200 "the given array of thread IDs");
2201 }
2202
2203 MutexLockerEx ml(Threads_lock);
2204 for (int i = 0; i < num_threads; i++) {
2205 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2206 if (java_thread != NULL) {
2207 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2208 }
2209 }
2210 JVM_END
2211
2212 // Returns the CPU time consumed by a given thread (in nanoseconds).
2213 // If thread_id == 0, CPU time for the current thread is returned.
2214 // If user_sys_cpu_time = true, user level and system CPU time of
2215 // a given thread is returned; otherwise, only user level CPU time
2216 // is returned.
2217 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2218 if (!os::is_thread_cpu_time_supported()) {
2219 return -1;
2220 }
2221
2222 if (thread_id < 0) {
2223 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2224 "Invalid thread ID", -1);
2225 }
2226
2227 JavaThread* java_thread = NULL;
2228 if (thread_id == 0) {
2229 // current thread
2230 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2231 } else {
2232 MutexLockerEx ml(Threads_lock);
2233 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
2234 if (java_thread != NULL) {
2235 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2236 }
2237 }
2238 return -1;
2239 JVM_END
2240
2241 // Gets an array containing the CPU times consumed by a set of threads
2242 // (in nanoseconds). Each element of the array is the CPU time for the
2243 // thread ID specified in the corresponding entry in the given array
2244 // of thread IDs; or -1 if the thread does not exist or has terminated.
2245 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2246 // for the given thread is returned; otherwise, only user level CPU time
2247 // is returned.
2248 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2249 jlongArray timeArray,
2250 jboolean user_sys_cpu_time))
2251 // Check if threads is null
2252 if (ids == NULL || timeArray == NULL) {
2253 THROW(vmSymbols::java_lang_NullPointerException());
2254 }
2255
2256 ResourceMark rm(THREAD);
2257 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2258 typeArrayHandle ids_ah(THREAD, ta);
2259
2260 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2261 typeArrayHandle timeArray_h(THREAD, tia);
2262
2263 // validate the thread id array
2264 validate_thread_id_array(ids_ah, CHECK);
2265
2266 // timeArray must be of the same length as the given array of thread IDs
2267 int num_threads = ids_ah->length();
2268 if (num_threads != timeArray_h->length()) {
2269 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2270 "The length of the given long array does not match the length of "
2271 "the given array of thread IDs");
2272 }
2273
2274 MutexLockerEx ml(Threads_lock);
2275 for (int i = 0; i < num_threads; i++) {
2276 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2277 if (java_thread != NULL) {
2278 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2279 user_sys_cpu_time != 0));
2280 }
2281 }
2282 JVM_END
2283
2284
2285
2286 #if INCLUDE_MANAGEMENT
2287 const struct jmmInterface_1_ jmm_interface = {
2288 NULL,
2289 NULL,
2290 jmm_GetVersion,
2291 jmm_GetOptionalSupport,
2292 jmm_GetInputArguments,
2293 jmm_GetThreadInfo,
2294 jmm_GetInputArgumentArray,
2295 jmm_GetMemoryPools,
2296 jmm_GetMemoryManagers,
2297 jmm_GetMemoryPoolUsage,
2298 jmm_GetPeakMemoryPoolUsage,
2299 jmm_GetThreadAllocatedMemory,
2300 jmm_GetMemoryUsage,
2301 jmm_GetLongAttribute,
2302 jmm_GetBoolAttribute,
2303 jmm_SetBoolAttribute,
2304 jmm_GetLongAttributes,
2305 jmm_FindMonitorDeadlockedThreads,
2306 jmm_GetThreadCpuTime,
2307 jmm_GetVMGlobalNames,
2308 jmm_GetVMGlobals,
2309 jmm_GetInternalThreadTimes,
2310 jmm_ResetStatistic,
2311 jmm_SetPoolSensor,
2312 jmm_SetPoolThreshold,
2313 jmm_GetPoolCollectionUsage,
2314 jmm_GetGCExtAttributeInfo,
2315 jmm_GetLastGCStat,
2316 jmm_GetThreadCpuTimeWithKind,
2317 jmm_GetThreadCpuTimesWithKind,
2318 jmm_DumpHeap0,
2319 jmm_FindDeadlockedThreads,
2320 jmm_SetVMGlobal,
2321 NULL,
2322 jmm_DumpThreads,
2323 jmm_SetGCNotificationEnabled,
2324 jmm_GetDiagnosticCommands,
2325 jmm_GetDiagnosticCommandInfo,
2326 jmm_GetDiagnosticCommandArgumentsInfo,
2327 jmm_ExecuteDiagnosticCommand,
2328 jmm_SetDiagnosticFrameworkNotificationEnabled
2329 };
2330 #endif // INCLUDE_MANAGEMENT
2331
2332 void* Management::get_jmm_interface(int version) {
2333 #if INCLUDE_MANAGEMENT
2334 if (version == JMM_VERSION_1_0) {
2335 return (void*) &jmm_interface;
2336 }
2337 #endif // INCLUDE_MANAGEMENT
2338 return NULL;
2339 }