1 /*
2 * Copyright (c) 2003, 2013, 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/nmtDCmd.hpp"
50 #include "services/management.hpp"
51 #include "services/memoryManager.hpp"
52 #include "services/memoryPool.hpp"
53 #include "services/memoryService.hpp"
54 #include "services/runtimeService.hpp"
55 #include "services/threadService.hpp"
56 #include "utilities/macros.hpp"
57
58 PerfVariable* Management::_begin_vm_creation_time = NULL;
59 PerfVariable* Management::_end_vm_creation_time = NULL;
60 PerfVariable* Management::_vm_init_done_time = NULL;
61
62 Klass* Management::_sensor_klass = NULL;
63 Klass* Management::_threadInfo_klass = NULL;
64 Klass* Management::_memoryUsage_klass = NULL;
65 Klass* Management::_memoryPoolMXBean_klass = NULL;
66 Klass* Management::_memoryManagerMXBean_klass = NULL;
67 Klass* Management::_garbageCollectorMXBean_klass = NULL;
68 Klass* Management::_managementFactory_klass = NULL;
69 Klass* Management::_garbageCollectorImpl_klass = NULL;
70 Klass* Management::_gcInfo_klass = NULL;
71 Klass* Management::_diagnosticCommandImpl_klass = NULL;
72 Klass* Management::_managementFactoryHelper_klass = NULL;
73
74
75 jmmOptionalSupport Management::_optional_support = {0};
76 TimeStamp Management::_stamp;
77
78 void management_init() {
79 #if INCLUDE_MANAGEMENT
80 Management::init();
81 ThreadService::init();
82 RuntimeService::init();
83 ClassLoadingService::init();
84 #else
85 ThreadService::init();
86 // Make sure the VM version is initialized
87 // This is normally called by RuntimeService::init().
88 // Since that is conditionalized out, we need to call it here.
89 Abstract_VM_Version::initialize();
90 #endif // INCLUDE_MANAGEMENT
91 }
92
93 #if INCLUDE_MANAGEMENT
94
95 void Management::init() {
96 EXCEPTION_MARK;
97
98 // These counters are for java.lang.management API support.
99 // They are created even if -XX:-UsePerfData is set and in
100 // that case, they will be allocated on C heap.
101
102 _begin_vm_creation_time =
103 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
104 PerfData::U_None, CHECK);
105
106 _end_vm_creation_time =
107 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
108 PerfData::U_None, CHECK);
109
110 _vm_init_done_time =
111 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
112 PerfData::U_None, CHECK);
113
114 // Initialize optional support
115 _optional_support.isLowMemoryDetectionSupported = 1;
116 _optional_support.isCompilationTimeMonitoringSupported = 1;
117 _optional_support.isThreadContentionMonitoringSupported = 1;
118
119 if (os::is_thread_cpu_time_supported()) {
120 _optional_support.isCurrentThreadCpuTimeSupported = 1;
121 _optional_support.isOtherThreadCpuTimeSupported = 1;
122 } else {
123 _optional_support.isCurrentThreadCpuTimeSupported = 0;
124 _optional_support.isOtherThreadCpuTimeSupported = 0;
125 }
126
127 _optional_support.isBootClassPathSupported = 1;
128 _optional_support.isObjectMonitorUsageSupported = 1;
129 #if INCLUDE_SERVICES
130 // This depends on the heap inspector
131 _optional_support.isSynchronizerUsageSupported = 1;
132 #endif // INCLUDE_SERVICES
133 _optional_support.isThreadAllocatedMemorySupported = 1;
134 _optional_support.isRemoteDiagnosticCommandsSupported = 1;
135
136 // Registration of the diagnostic commands
137 DCmdRegistrant::register_dcmds();
138 DCmdRegistrant::register_dcmds_ext();
139 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
140 | DCmd_Source_MBean;
141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
142 }
143
144 void Management::initialize(TRAPS) {
145 // Start the service thread
146 ServiceThread::initialize();
147
148 if (ManagementServer) {
149 ResourceMark rm(THREAD);
150 HandleMark hm(THREAD);
151
152 // Load and initialize the sun.management.Agent class
153 // invoke startAgent method to start the management server
154 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
155 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(),
156 loader,
157 Handle(),
158 true,
159 CHECK);
160 instanceKlassHandle ik (THREAD, k);
161
162 JavaValue result(T_VOID);
163 JavaCalls::call_static(&result,
164 ik,
165 vmSymbols::startAgent_name(),
166 vmSymbols::void_method_signature(),
167 CHECK);
168 }
169 }
170
171 void Management::get_optional_support(jmmOptionalSupport* support) {
172 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
173 }
174
175 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
176 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
177 instanceKlassHandle ik (THREAD, k);
178 if (ik->should_be_initialized()) {
179 ik->initialize(CHECK_NULL);
180 }
181 // If these classes change to not be owned by the boot loader, they need
182 // to be walked to keep their class loader alive in oops_do.
183 assert(ik->class_loader() == NULL, "need to follow in oops_do");
184 return ik();
185 }
186
187 void Management::record_vm_startup_time(jlong begin, jlong duration) {
188 // if the performance counter is not initialized,
189 // then vm initialization failed; simply return.
190 if (_begin_vm_creation_time == NULL) return;
191
192 _begin_vm_creation_time->set_value(begin);
193 _end_vm_creation_time->set_value(begin + duration);
194 PerfMemory::set_accessible(true);
195 }
196
197 jlong Management::timestamp() {
198 TimeStamp t;
199 t.update();
200 return t.ticks() - _stamp.ticks();
201 }
202
203 void Management::oops_do(OopClosure* f) {
204 MemoryService::oops_do(f);
205 ThreadService::oops_do(f);
206 }
207
208 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
209 if (_threadInfo_klass == NULL) {
210 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
211 }
212 return _threadInfo_klass;
213 }
214
215 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
216 if (_memoryUsage_klass == NULL) {
217 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
218 }
219 return _memoryUsage_klass;
220 }
221
222 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
223 if (_memoryPoolMXBean_klass == NULL) {
224 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
225 }
226 return _memoryPoolMXBean_klass;
227 }
228
229 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
230 if (_memoryManagerMXBean_klass == NULL) {
231 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
232 }
233 return _memoryManagerMXBean_klass;
234 }
235
236 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
237 if (_garbageCollectorMXBean_klass == NULL) {
238 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
239 }
240 return _garbageCollectorMXBean_klass;
241 }
242
243 Klass* Management::sun_management_Sensor_klass(TRAPS) {
244 if (_sensor_klass == NULL) {
245 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
246 }
247 return _sensor_klass;
248 }
249
250 Klass* Management::sun_management_ManagementFactory_klass(TRAPS) {
251 if (_managementFactory_klass == NULL) {
252 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL);
253 }
254 return _managementFactory_klass;
255 }
256
257 Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) {
258 if (_garbageCollectorImpl_klass == NULL) {
259 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL);
260 }
261 return _garbageCollectorImpl_klass;
262 }
263
264 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) {
265 if (_gcInfo_klass == NULL) {
266 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
267 }
268 return _gcInfo_klass;
269 }
270
271 Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) {
272 if (_diagnosticCommandImpl_klass == NULL) {
273 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL);
274 }
275 return _diagnosticCommandImpl_klass;
276 }
277
278 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
279 if (_managementFactoryHelper_klass == NULL) {
280 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
281 }
282 return _managementFactoryHelper_klass;
283 }
284
285 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
286 Handle snapshot_thread(THREAD, snapshot->threadObj());
287
288 jlong contended_time;
289 jlong waited_time;
290 if (ThreadService::is_thread_monitoring_contention()) {
291 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
292 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
293 } else {
294 // set them to -1 if thread contention monitoring is disabled.
295 contended_time = max_julong;
296 waited_time = max_julong;
297 }
298
299 int thread_status = snapshot->thread_status();
300 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
301 if (snapshot->is_ext_suspended()) {
302 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
303 }
304 if (snapshot->is_in_native()) {
305 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
306 }
307
308 ThreadStackTrace* st = snapshot->get_stack_trace();
309 Handle stacktrace_h;
310 if (st != NULL) {
311 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
312 } else {
313 stacktrace_h = Handle();
314 }
315
316 args->push_oop(snapshot_thread);
317 args->push_int(thread_status);
318 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
319 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
320 args->push_long(snapshot->contended_enter_count());
321 args->push_long(contended_time);
322 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
323 args->push_long(waited_time);
324 args->push_oop(stacktrace_h);
325 }
326
327 // Helper function to construct a ThreadInfo object
328 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
329 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
330 instanceKlassHandle ik (THREAD, k);
331
332 JavaValue result(T_VOID);
333 JavaCallArguments args(14);
334
335 // First allocate a ThreadObj object and
336 // push the receiver as the first argument
337 Handle element = ik->allocate_instance_handle(CHECK_NULL);
338 args.push_oop(element);
339
340 // initialize the arguments for the ThreadInfo constructor
341 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
342
343 // Call ThreadInfo constructor with no locked monitors and synchronizers
344 JavaCalls::call_special(&result,
345 ik,
346 vmSymbols::object_initializer_name(),
347 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
348 &args,
349 CHECK_NULL);
350
351 return (instanceOop) element();
352 }
353
354 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
355 objArrayHandle monitors_array,
356 typeArrayHandle depths_array,
357 objArrayHandle synchronizers_array,
358 TRAPS) {
359 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
360 instanceKlassHandle ik (THREAD, k);
361
362 JavaValue result(T_VOID);
363 JavaCallArguments args(17);
364
365 // First allocate a ThreadObj object and
366 // push the receiver as the first argument
367 Handle element = ik->allocate_instance_handle(CHECK_NULL);
368 args.push_oop(element);
369
370 // initialize the arguments for the ThreadInfo constructor
371 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
372
373 // push the locked monitors and synchronizers in the arguments
374 args.push_oop(monitors_array);
375 args.push_oop(depths_array);
376 args.push_oop(synchronizers_array);
377
378 // Call ThreadInfo constructor with locked monitors and synchronizers
379 JavaCalls::call_special(&result,
380 ik,
381 vmSymbols::object_initializer_name(),
382 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
383 &args,
384 CHECK_NULL);
385
386 return (instanceOop) element();
387 }
388
389 // Helper functions
390 static JavaThread* find_java_thread_from_id(jlong thread_id) {
391 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
392
393 JavaThread* java_thread = NULL;
394 // Sequential search for now. Need to do better optimization later.
395 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) {
396 oop tobj = thread->threadObj();
397 if (!thread->is_exiting() &&
398 tobj != NULL &&
399 thread_id == java_lang_Thread::thread_id(tobj)) {
400 java_thread = thread;
401 break;
402 }
403 }
404 return java_thread;
405 }
406
407 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
408 if (mgr == NULL) {
409 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
410 }
411 oop mgr_obj = JNIHandles::resolve(mgr);
412 instanceHandle h(THREAD, (instanceOop) mgr_obj);
413
414 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
415 if (!h->is_a(k)) {
416 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
417 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
418 NULL);
419 }
420
421 MemoryManager* gc = MemoryService::get_memory_manager(h);
422 if (gc == NULL || !gc->is_gc_memory_manager()) {
423 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
424 "Invalid GC memory manager",
425 NULL);
426 }
427 return (GCMemoryManager*) gc;
428 }
429
430 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
431 if (obj == NULL) {
432 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
433 }
434
435 oop pool_obj = JNIHandles::resolve(obj);
436 assert(pool_obj->is_instance(), "Should be an instanceOop");
437 instanceHandle ph(THREAD, (instanceOop) pool_obj);
438
439 return MemoryService::get_memory_pool(ph);
440 }
441
442 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
443 int num_threads = ids_ah->length();
444
445 // Validate input thread IDs
446 int i = 0;
447 for (i = 0; i < num_threads; i++) {
448 jlong tid = ids_ah->long_at(i);
449 if (tid <= 0) {
450 // throw exception if invalid thread id.
451 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
452 "Invalid thread ID entry");
453 }
454 }
455 }
456
457 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
458 // check if the element of infoArray is of type ThreadInfo class
459 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
460 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
461 if (element_klass != threadinfo_klass) {
462 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
463 "infoArray element type is not ThreadInfo class");
464 }
465 }
466
467
468 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
469 if (obj == NULL) {
470 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
471 }
472
473 oop mgr_obj = JNIHandles::resolve(obj);
474 assert(mgr_obj->is_instance(), "Should be an instanceOop");
475 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
476
477 return MemoryService::get_memory_manager(mh);
478 }
479
480 // Returns a version string and sets major and minor version if
481 // the input parameters are non-null.
482 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
483 return JMM_VERSION;
484 JVM_END
485
486 // Gets the list of VM monitoring and management optional supports
487 // Returns 0 if succeeded; otherwise returns non-zero.
488 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
489 if (support == NULL) {
490 return -1;
491 }
492 Management::get_optional_support(support);
493 return 0;
494 JVM_END
495
496 // Returns a java.lang.String object containing the input arguments to the VM.
497 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
498 ResourceMark rm(THREAD);
499
500 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
501 return NULL;
502 }
503
504 char** vm_flags = Arguments::jvm_flags_array();
505 char** vm_args = Arguments::jvm_args_array();
506 int num_flags = Arguments::num_jvm_flags();
507 int num_args = Arguments::num_jvm_args();
508
509 size_t length = 1; // null terminator
510 int i;
511 for (i = 0; i < num_flags; i++) {
512 length += strlen(vm_flags[i]);
513 }
514 for (i = 0; i < num_args; i++) {
515 length += strlen(vm_args[i]);
516 }
517 // add a space between each argument
518 length += num_flags + num_args - 1;
519
520 // Return the list of input arguments passed to the VM
521 // and preserve the order that the VM processes.
522 char* args = NEW_RESOURCE_ARRAY(char, length);
523 args[0] = '\0';
524 // concatenate all jvm_flags
525 if (num_flags > 0) {
526 strcat(args, vm_flags[0]);
527 for (i = 1; i < num_flags; i++) {
528 strcat(args, " ");
529 strcat(args, vm_flags[i]);
530 }
531 }
532
533 if (num_args > 0 && num_flags > 0) {
534 // append a space if args already contains one or more jvm_flags
535 strcat(args, " ");
536 }
537
538 // concatenate all jvm_args
539 if (num_args > 0) {
540 strcat(args, vm_args[0]);
541 for (i = 1; i < num_args; i++) {
542 strcat(args, " ");
543 strcat(args, vm_args[i]);
544 }
545 }
546
547 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
548 return JNIHandles::make_local(env, hargs());
549 JVM_END
550
551 // Returns an array of java.lang.String object containing the input arguments to the VM.
552 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
553 ResourceMark rm(THREAD);
554
555 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
556 return NULL;
557 }
558
559 char** vm_flags = Arguments::jvm_flags_array();
560 char** vm_args = Arguments::jvm_args_array();
561 int num_flags = Arguments::num_jvm_flags();
562 int num_args = Arguments::num_jvm_args();
563
564 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass());
565 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
566 objArrayHandle result_h(THREAD, r);
567
568 int index = 0;
569 for (int j = 0; j < num_flags; j++, index++) {
570 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
571 result_h->obj_at_put(index, h());
572 }
573 for (int i = 0; i < num_args; i++, index++) {
574 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
575 result_h->obj_at_put(index, h());
576 }
577 return (jobjectArray) JNIHandles::make_local(env, result_h());
578 JVM_END
579
580 // Returns an array of java/lang/management/MemoryPoolMXBean object
581 // one for each memory pool if obj == null; otherwise returns
582 // an array of memory pools for a given memory manager if
583 // it is a valid memory manager.
584 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
585 ResourceMark rm(THREAD);
586
587 int num_memory_pools;
588 MemoryManager* mgr = NULL;
589 if (obj == NULL) {
590 num_memory_pools = MemoryService::num_memory_pools();
591 } else {
592 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
593 if (mgr == NULL) {
594 return NULL;
595 }
596 num_memory_pools = mgr->num_memory_pools();
597 }
598
599 // Allocate the resulting MemoryPoolMXBean[] object
600 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
601 instanceKlassHandle ik (THREAD, k);
602 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
603 objArrayHandle poolArray(THREAD, r);
604
605 if (mgr == NULL) {
606 // Get all memory pools
607 for (int i = 0; i < num_memory_pools; i++) {
608 MemoryPool* pool = MemoryService::get_memory_pool(i);
609 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
610 instanceHandle ph(THREAD, p);
611 poolArray->obj_at_put(i, ph());
612 }
613 } else {
614 // Get memory pools managed by a given memory manager
615 for (int i = 0; i < num_memory_pools; i++) {
616 MemoryPool* pool = mgr->get_memory_pool(i);
617 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
618 instanceHandle ph(THREAD, p);
619 poolArray->obj_at_put(i, ph());
620 }
621 }
622 return (jobjectArray) JNIHandles::make_local(env, poolArray());
623 JVM_END
624
625 // Returns an array of java/lang/management/MemoryManagerMXBean object
626 // one for each memory manager if obj == null; otherwise returns
627 // an array of memory managers for a given memory pool if
628 // it is a valid memory pool.
629 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
630 ResourceMark rm(THREAD);
631
632 int num_mgrs;
633 MemoryPool* pool = NULL;
634 if (obj == NULL) {
635 num_mgrs = MemoryService::num_memory_managers();
636 } else {
637 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
638 if (pool == NULL) {
639 return NULL;
640 }
641 num_mgrs = pool->num_memory_managers();
642 }
643
644 // Allocate the resulting MemoryManagerMXBean[] object
645 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
646 instanceKlassHandle ik (THREAD, k);
647 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
648 objArrayHandle mgrArray(THREAD, r);
649
650 if (pool == NULL) {
651 // Get all memory managers
652 for (int i = 0; i < num_mgrs; i++) {
653 MemoryManager* mgr = MemoryService::get_memory_manager(i);
654 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
655 instanceHandle ph(THREAD, p);
656 mgrArray->obj_at_put(i, ph());
657 }
658 } else {
659 // Get memory managers for a given memory pool
660 for (int i = 0; i < num_mgrs; i++) {
661 MemoryManager* mgr = pool->get_memory_manager(i);
662 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
663 instanceHandle ph(THREAD, p);
664 mgrArray->obj_at_put(i, ph());
665 }
666 }
667 return (jobjectArray) JNIHandles::make_local(env, mgrArray());
668 JVM_END
669
670
671 // Returns a java/lang/management/MemoryUsage object containing the memory usage
672 // of a given memory pool.
673 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
674 ResourceMark rm(THREAD);
675
676 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
677 if (pool != NULL) {
678 MemoryUsage usage = pool->get_memory_usage();
679 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
680 return JNIHandles::make_local(env, h());
681 } else {
682 return NULL;
683 }
684 JVM_END
685
686 // Returns a java/lang/management/MemoryUsage object containing the memory usage
687 // of a given memory pool.
688 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
689 ResourceMark rm(THREAD);
690
691 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
692 if (pool != NULL) {
693 MemoryUsage usage = pool->get_peak_memory_usage();
694 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
695 return JNIHandles::make_local(env, h());
696 } else {
697 return NULL;
698 }
699 JVM_END
700
701 // Returns a java/lang/management/MemoryUsage object containing the memory usage
702 // of a given memory pool after most recent GC.
703 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
704 ResourceMark rm(THREAD);
705
706 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
707 if (pool != NULL && pool->is_collected_pool()) {
708 MemoryUsage usage = pool->get_last_collection_usage();
709 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
710 return JNIHandles::make_local(env, h());
711 } else {
712 return NULL;
713 }
714 JVM_END
715
716 // Sets the memory pool sensor for a threshold type
717 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
718 if (obj == NULL || sensorObj == NULL) {
719 THROW(vmSymbols::java_lang_NullPointerException());
720 }
721
722 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
723 oop s = JNIHandles::resolve(sensorObj);
724 assert(s->is_instance(), "Sensor should be an instanceOop");
725 instanceHandle sensor_h(THREAD, (instanceOop) s);
726 if (!sensor_h->is_a(sensor_klass)) {
727 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
728 "Sensor is not an instance of sun.management.Sensor class");
729 }
730
731 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
732 assert(mpool != NULL, "MemoryPool should exist");
733
734 switch (type) {
735 case JMM_USAGE_THRESHOLD_HIGH:
736 case JMM_USAGE_THRESHOLD_LOW:
737 // have only one sensor for threshold high and low
738 mpool->set_usage_sensor_obj(sensor_h);
739 break;
740 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
741 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
742 // have only one sensor for threshold high and low
743 mpool->set_gc_usage_sensor_obj(sensor_h);
744 break;
745 default:
746 assert(false, "Unrecognized type");
747 }
748
749 JVM_END
750
751
752 // Sets the threshold of a given memory pool.
753 // Returns the previous threshold.
754 //
755 // Input parameters:
756 // pool - the MemoryPoolMXBean object
757 // type - threshold type
758 // threshold - the new threshold (must not be negative)
759 //
760 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
761 if (threshold < 0) {
762 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
763 "Invalid threshold value",
764 -1);
765 }
766
767 if ((size_t)threshold > max_uintx) {
768 stringStream st;
769 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx);
770 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
771 }
772
773 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
774 assert(pool != NULL, "MemoryPool should exist");
775
776 jlong prev = 0;
777 switch (type) {
778 case JMM_USAGE_THRESHOLD_HIGH:
779 if (!pool->usage_threshold()->is_high_threshold_supported()) {
780 return -1;
781 }
782 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
783 break;
784
785 case JMM_USAGE_THRESHOLD_LOW:
786 if (!pool->usage_threshold()->is_low_threshold_supported()) {
787 return -1;
788 }
789 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
790 break;
791
792 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
793 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
794 return -1;
795 }
796 // return and the new threshold is effective for the next GC
797 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
798
799 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
800 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
801 return -1;
802 }
803 // return and the new threshold is effective for the next GC
804 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
805
806 default:
807 assert(false, "Unrecognized type");
808 return -1;
809 }
810
811 // When the threshold is changed, reevaluate if the low memory
812 // detection is enabled.
813 if (prev != threshold) {
814 LowMemoryDetector::recompute_enabled_for_collected_pools();
815 LowMemoryDetector::detect_low_memory(pool);
816 }
817 return prev;
818 JVM_END
819
820 // Gets an array containing the amount of memory allocated on the Java
821 // heap for a set of threads (in bytes). Each element of the array is
822 // the amount of memory allocated for the thread ID specified in the
823 // corresponding entry in the given array of thread IDs; or -1 if the
824 // thread does not exist or has terminated.
825 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
826 jlongArray sizeArray))
827 // Check if threads is null
828 if (ids == NULL || sizeArray == NULL) {
829 THROW(vmSymbols::java_lang_NullPointerException());
830 }
831
832 ResourceMark rm(THREAD);
833 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
834 typeArrayHandle ids_ah(THREAD, ta);
835
836 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
837 typeArrayHandle sizeArray_h(THREAD, sa);
838
839 // validate the thread id array
840 validate_thread_id_array(ids_ah, CHECK);
841
842 // sizeArray must be of the same length as the given array of thread IDs
843 int num_threads = ids_ah->length();
844 if (num_threads != sizeArray_h->length()) {
845 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
846 "The length of the given long array does not match the length of "
847 "the given array of thread IDs");
848 }
849
850 MutexLockerEx ml(Threads_lock);
851 for (int i = 0; i < num_threads; i++) {
852 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i));
853 if (java_thread != NULL) {
854 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
855 }
856 }
857 JVM_END
858
859 // Returns a java/lang/management/MemoryUsage object representing
860 // the memory usage for the heap or non-heap memory.
861 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
862 ResourceMark rm(THREAD);
863
864 // Calculate the memory usage
865 size_t total_init = 0;
866 size_t total_used = 0;
867 size_t total_committed = 0;
868 size_t total_max = 0;
869 bool has_undefined_init_size = false;
870 bool has_undefined_max_size = false;
871
872 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
873 MemoryPool* pool = MemoryService::get_memory_pool(i);
874 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
875 MemoryUsage u = pool->get_memory_usage();
876 total_used += u.used();
877 total_committed += u.committed();
878
879 if (u.init_size() == (size_t)-1) {
880 has_undefined_init_size = true;
881 }
882 if (!has_undefined_init_size) {
883 total_init += u.init_size();
884 }
885
886 if (u.max_size() == (size_t)-1) {
887 has_undefined_max_size = true;
888 }
889 if (!has_undefined_max_size) {
890 total_max += u.max_size();
891 }
892 }
893 }
894
895 // if any one of the memory pool has undefined init_size or max_size,
896 // set it to -1
897 if (has_undefined_init_size) {
898 total_init = (size_t)-1;
899 }
900 if (has_undefined_max_size) {
901 total_max = (size_t)-1;
902 }
903
904 MemoryUsage usage((heap ? InitialHeapSize : total_init),
905 total_used,
906 total_committed,
907 (heap ? Universe::heap()->max_capacity() : total_max));
908
909 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
910 return JNIHandles::make_local(env, obj());
911 JVM_END
912
913 // Returns the boolean value of a given attribute.
914 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
915 switch (att) {
916 case JMM_VERBOSE_GC:
917 return MemoryService::get_verbose();
918 case JMM_VERBOSE_CLASS:
919 return ClassLoadingService::get_verbose();
920 case JMM_THREAD_CONTENTION_MONITORING:
921 return ThreadService::is_thread_monitoring_contention();
922 case JMM_THREAD_CPU_TIME:
923 return ThreadService::is_thread_cpu_time_enabled();
924 case JMM_THREAD_ALLOCATED_MEMORY:
925 return ThreadService::is_thread_allocated_memory_enabled();
926 default:
927 assert(0, "Unrecognized attribute");
928 return false;
929 }
930 JVM_END
931
932 // Sets the given boolean attribute and returns the previous value.
933 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
934 switch (att) {
935 case JMM_VERBOSE_GC:
936 return MemoryService::set_verbose(flag != 0);
937 case JMM_VERBOSE_CLASS:
938 return ClassLoadingService::set_verbose(flag != 0);
939 case JMM_THREAD_CONTENTION_MONITORING:
940 return ThreadService::set_thread_monitoring_contention(flag != 0);
941 case JMM_THREAD_CPU_TIME:
942 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
943 case JMM_THREAD_ALLOCATED_MEMORY:
944 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
945 default:
946 assert(0, "Unrecognized attribute");
947 return false;
948 }
949 JVM_END
950
951
952 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
953 switch (att) {
954 case JMM_GC_TIME_MS:
955 return mgr->gc_time_ms();
956
957 case JMM_GC_COUNT:
958 return mgr->gc_count();
959
960 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
961 // current implementation only has 1 ext attribute
962 return 1;
963
964 default:
965 assert(0, "Unrecognized GC attribute");
966 return -1;
967 }
968 }
969
970 class VmThreadCountClosure: public ThreadClosure {
971 private:
972 int _count;
973 public:
974 VmThreadCountClosure() : _count(0) {};
975 void do_thread(Thread* thread);
976 int count() { return _count; }
977 };
978
979 void VmThreadCountClosure::do_thread(Thread* thread) {
980 // exclude externally visible JavaThreads
981 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
982 return;
983 }
984
985 _count++;
986 }
987
988 static jint get_vm_thread_count() {
989 VmThreadCountClosure vmtcc;
990 {
991 MutexLockerEx ml(Threads_lock);
992 Threads::threads_do(&vmtcc);
993 }
994
995 return vmtcc.count();
996 }
997
998 static jint get_num_flags() {
999 // last flag entry is always NULL, so subtract 1
1000 int nFlags = (int) Flag::numFlags - 1;
1001 int count = 0;
1002 for (int i = 0; i < nFlags; i++) {
1003 Flag* flag = &Flag::flags[i];
1004 // Exclude the locked (diagnostic, experimental) flags
1005 if (flag->is_unlocked() || flag->is_unlocker()) {
1006 count++;
1007 }
1008 }
1009 return count;
1010 }
1011
1012 static jlong get_long_attribute(jmmLongAttribute att) {
1013 switch (att) {
1014 case JMM_CLASS_LOADED_COUNT:
1015 return ClassLoadingService::loaded_class_count();
1016
1017 case JMM_CLASS_UNLOADED_COUNT:
1018 return ClassLoadingService::unloaded_class_count();
1019
1020 case JMM_THREAD_TOTAL_COUNT:
1021 return ThreadService::get_total_thread_count();
1022
1023 case JMM_THREAD_LIVE_COUNT:
1024 return ThreadService::get_live_thread_count();
1025
1026 case JMM_THREAD_PEAK_COUNT:
1027 return ThreadService::get_peak_thread_count();
1028
1029 case JMM_THREAD_DAEMON_COUNT:
1030 return ThreadService::get_daemon_thread_count();
1031
1032 case JMM_JVM_INIT_DONE_TIME_MS:
1033 return Management::vm_init_done_time();
1034
1035 case JMM_JVM_UPTIME_MS:
1036 return Management::ticks_to_ms(os::elapsed_counter());
1037
1038 case JMM_COMPILE_TOTAL_TIME_MS:
1039 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
1040
1041 case JMM_OS_PROCESS_ID:
1042 return os::current_process_id();
1043
1044 // Hotspot-specific counters
1045 case JMM_CLASS_LOADED_BYTES:
1046 return ClassLoadingService::loaded_class_bytes();
1047
1048 case JMM_CLASS_UNLOADED_BYTES:
1049 return ClassLoadingService::unloaded_class_bytes();
1050
1051 case JMM_SHARED_CLASS_LOADED_COUNT:
1052 return ClassLoadingService::loaded_shared_class_count();
1053
1054 case JMM_SHARED_CLASS_UNLOADED_COUNT:
1055 return ClassLoadingService::unloaded_shared_class_count();
1056
1057
1058 case JMM_SHARED_CLASS_LOADED_BYTES:
1059 return ClassLoadingService::loaded_shared_class_bytes();
1060
1061 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1062 return ClassLoadingService::unloaded_shared_class_bytes();
1063
1064 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1065 return ClassLoader::classloader_time_ms();
1066
1067 case JMM_VM_GLOBAL_COUNT:
1068 return get_num_flags();
1069
1070 case JMM_SAFEPOINT_COUNT:
1071 return RuntimeService::safepoint_count();
1072
1073 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1074 return RuntimeService::safepoint_sync_time_ms();
1075
1076 case JMM_TOTAL_STOPPED_TIME_MS:
1077 return RuntimeService::safepoint_time_ms();
1078
1079 case JMM_TOTAL_APP_TIME_MS:
1080 return RuntimeService::application_time_ms();
1081
1082 case JMM_VM_THREAD_COUNT:
1083 return get_vm_thread_count();
1084
1085 case JMM_CLASS_INIT_TOTAL_COUNT:
1086 return ClassLoader::class_init_count();
1087
1088 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1089 return ClassLoader::class_init_time_ms();
1090
1091 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1092 return ClassLoader::class_verify_time_ms();
1093
1094 case JMM_METHOD_DATA_SIZE_BYTES:
1095 return ClassLoadingService::class_method_data_size();
1096
1097 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1098 return os::physical_memory();
1099
1100 default:
1101 return -1;
1102 }
1103 }
1104
1105
1106 // Returns the long value of a given attribute.
1107 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
1108 if (obj == NULL) {
1109 return get_long_attribute(att);
1110 } else {
1111 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
1112 if (mgr != NULL) {
1113 return get_gc_attribute(mgr, att);
1114 }
1115 }
1116 return -1;
1117 JVM_END
1118
1119 // Gets the value of all attributes specified in the given array
1120 // and sets the value in the result array.
1121 // Returns the number of attributes found.
1122 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1123 jobject obj,
1124 jmmLongAttribute* atts,
1125 jint count,
1126 jlong* result))
1127
1128 int num_atts = 0;
1129 if (obj == NULL) {
1130 for (int i = 0; i < count; i++) {
1131 result[i] = get_long_attribute(atts[i]);
1132 if (result[i] != -1) {
1133 num_atts++;
1134 }
1135 }
1136 } else {
1137 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1138 for (int i = 0; i < count; i++) {
1139 result[i] = get_gc_attribute(mgr, atts[i]);
1140 if (result[i] != -1) {
1141 num_atts++;
1142 }
1143 }
1144 }
1145 return num_atts;
1146 JVM_END
1147
1148 // Helper function to do thread dump for a specific list of threads
1149 static void do_thread_dump(ThreadDumpResult* dump_result,
1150 typeArrayHandle ids_ah, // array of thread ID (long[])
1151 int num_threads,
1152 int max_depth,
1153 bool with_locked_monitors,
1154 bool with_locked_synchronizers,
1155 TRAPS) {
1156
1157 // First get an array of threadObj handles.
1158 // A JavaThread may terminate before we get the stack trace.
1159 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1160 {
1161 MutexLockerEx ml(Threads_lock);
1162 for (int i = 0; i < num_threads; i++) {
1163 jlong tid = ids_ah->long_at(i);
1164 JavaThread* jt = find_java_thread_from_id(tid);
1165 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
1166 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1167 thread_handle_array->append(threadObj_h);
1168 }
1169 }
1170
1171 // Obtain thread dumps and thread snapshot information
1172 VM_ThreadDump op(dump_result,
1173 thread_handle_array,
1174 num_threads,
1175 max_depth, /* stack depth */
1176 with_locked_monitors,
1177 with_locked_synchronizers);
1178 VMThread::execute(&op);
1179 }
1180
1181 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1182 // for the thread ID specified in the corresponding entry in
1183 // the given array of thread IDs; or NULL if the thread does not exist
1184 // or has terminated.
1185 //
1186 // Input parameters:
1187 // ids - array of thread IDs
1188 // maxDepth - the maximum depth of stack traces to be dumped:
1189 // maxDepth == -1 requests to dump entire stack trace.
1190 // maxDepth == 0 requests no stack trace.
1191 // infoArray - array of ThreadInfo objects
1192 //
1193 // QQQ - Why does this method return a value instead of void?
1194 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1195 // Check if threads is null
1196 if (ids == NULL || infoArray == NULL) {
1197 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1198 }
1199
1200 if (maxDepth < -1) {
1201 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1202 "Invalid maxDepth", -1);
1203 }
1204
1205 ResourceMark rm(THREAD);
1206 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1207 typeArrayHandle ids_ah(THREAD, ta);
1208
1209 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1210 objArrayOop oa = objArrayOop(infoArray_obj);
1211 objArrayHandle infoArray_h(THREAD, oa);
1212
1213 // validate the thread id array
1214 validate_thread_id_array(ids_ah, CHECK_0);
1215
1216 // validate the ThreadInfo[] parameters
1217 validate_thread_info_array(infoArray_h, CHECK_0);
1218
1219 // infoArray must be of the same length as the given array of thread IDs
1220 int num_threads = ids_ah->length();
1221 if (num_threads != infoArray_h->length()) {
1222 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1223 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1224 }
1225
1226 if (JDK_Version::is_gte_jdk16x_version()) {
1227 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1228 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1229 }
1230
1231 // Must use ThreadDumpResult to store the ThreadSnapshot.
1232 // GC may occur after the thread snapshots are taken but before
1233 // this function returns. The threadObj and other oops kept
1234 // in the ThreadSnapshot are marked and adjusted during GC.
1235 ThreadDumpResult dump_result(num_threads);
1236
1237 if (maxDepth == 0) {
1238 // no stack trace dumped - do not need to stop the world
1239 {
1240 MutexLockerEx ml(Threads_lock);
1241 for (int i = 0; i < num_threads; i++) {
1242 jlong tid = ids_ah->long_at(i);
1243 JavaThread* jt = find_java_thread_from_id(tid);
1244 ThreadSnapshot* ts;
1245 if (jt == NULL) {
1246 // if the thread does not exist or now it is terminated,
1247 // create dummy snapshot
1248 ts = new ThreadSnapshot();
1249 } else {
1250 ts = new ThreadSnapshot(jt);
1251 }
1252 dump_result.add_thread_snapshot(ts);
1253 }
1254 }
1255 } else {
1256 // obtain thread dump with the specific list of threads with stack trace
1257 do_thread_dump(&dump_result,
1258 ids_ah,
1259 num_threads,
1260 maxDepth,
1261 false, /* no locked monitor */
1262 false, /* no locked synchronizers */
1263 CHECK_0);
1264 }
1265
1266 int num_snapshots = dump_result.num_snapshots();
1267 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1268 int index = 0;
1269 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1270 // For each thread, create an java/lang/management/ThreadInfo object
1271 // and fill with the thread information
1272
1273 if (ts->threadObj() == NULL) {
1274 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1275 infoArray_h->obj_at_put(index, NULL);
1276 continue;
1277 }
1278
1279 // Create java.lang.management.ThreadInfo object
1280 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1281 infoArray_h->obj_at_put(index, info_obj);
1282 }
1283 return 0;
1284 JVM_END
1285
1286 // Dump thread info for the specified threads.
1287 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1288 // for the thread ID specified in the corresponding entry in
1289 // the given array of thread IDs; or NULL if the thread does not exist
1290 // or has terminated.
1291 //
1292 // Input parameter:
1293 // ids - array of thread IDs; NULL indicates all live threads
1294 // locked_monitors - if true, dump locked object monitors
1295 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1296 //
1297 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1298 ResourceMark rm(THREAD);
1299
1300 if (JDK_Version::is_gte_jdk16x_version()) {
1301 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1302 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1303 }
1304
1305 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1306 int num_threads = (ta != NULL ? ta->length() : 0);
1307 typeArrayHandle ids_ah(THREAD, ta);
1308
1309 ThreadDumpResult dump_result(num_threads); // can safepoint
1310
1311 if (ids_ah() != NULL) {
1312
1313 // validate the thread id array
1314 validate_thread_id_array(ids_ah, CHECK_NULL);
1315
1316 // obtain thread dump of a specific list of threads
1317 do_thread_dump(&dump_result,
1318 ids_ah,
1319 num_threads,
1320 -1, /* entire stack */
1321 (locked_monitors ? true : false), /* with locked monitors */
1322 (locked_synchronizers ? true : false), /* with locked synchronizers */
1323 CHECK_NULL);
1324 } else {
1325 // obtain thread dump of all threads
1326 VM_ThreadDump op(&dump_result,
1327 -1, /* entire stack */
1328 (locked_monitors ? true : false), /* with locked monitors */
1329 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1330 VMThread::execute(&op);
1331 }
1332
1333 int num_snapshots = dump_result.num_snapshots();
1334
1335 // create the result ThreadInfo[] object
1336 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1337 instanceKlassHandle ik (THREAD, k);
1338 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1339 objArrayHandle result_h(THREAD, r);
1340
1341 int index = 0;
1342 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1343 if (ts->threadObj() == NULL) {
1344 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1345 result_h->obj_at_put(index, NULL);
1346 continue;
1347 }
1348
1349 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1350 assert(stacktrace != NULL, "Must have a stack trace dumped");
1351
1352 // Create Object[] filled with locked monitors
1353 // Create int[] filled with the stack depth where a monitor was locked
1354 int num_frames = stacktrace->get_stack_depth();
1355 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1356
1357 // Count the total number of locked monitors
1358 for (int i = 0; i < num_frames; i++) {
1359 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1360 num_locked_monitors += frame->num_locked_monitors();
1361 }
1362
1363 objArrayHandle monitors_array;
1364 typeArrayHandle depths_array;
1365 objArrayHandle synchronizers_array;
1366
1367 if (locked_monitors) {
1368 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1369 // where the thread locked it
1370 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1371 objArrayHandle mh(THREAD, array);
1372 monitors_array = mh;
1373
1374 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1375 typeArrayHandle dh(THREAD, tarray);
1376 depths_array = dh;
1377
1378 int count = 0;
1379 int j = 0;
1380 for (int depth = 0; depth < num_frames; depth++) {
1381 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1382 int len = frame->num_locked_monitors();
1383 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1384 for (j = 0; j < len; j++) {
1385 oop monitor = locked_monitors->at(j);
1386 assert(monitor != NULL && monitor->is_instance(), "must be a Java object");
1387 monitors_array->obj_at_put(count, monitor);
1388 depths_array->int_at_put(count, depth);
1389 count++;
1390 }
1391 }
1392
1393 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1394 for (j = 0; j < jni_locked_monitors->length(); j++) {
1395 oop object = jni_locked_monitors->at(j);
1396 assert(object != NULL && object->is_instance(), "must be a Java object");
1397 monitors_array->obj_at_put(count, object);
1398 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1399 depths_array->int_at_put(count, -1);
1400 count++;
1401 }
1402 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1403 }
1404
1405 if (locked_synchronizers) {
1406 // Create Object[] filled with locked JSR-166 synchronizers
1407 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1408 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1409 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1410 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1411
1412 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1413 objArrayHandle sh(THREAD, array);
1414 synchronizers_array = sh;
1415
1416 for (int k = 0; k < num_locked_synchronizers; k++) {
1417 synchronizers_array->obj_at_put(k, locks->at(k));
1418 }
1419 }
1420
1421 // Create java.lang.management.ThreadInfo object
1422 instanceOop info_obj = Management::create_thread_info_instance(ts,
1423 monitors_array,
1424 depths_array,
1425 synchronizers_array,
1426 CHECK_NULL);
1427 result_h->obj_at_put(index, info_obj);
1428 }
1429
1430 return (jobjectArray) JNIHandles::make_local(env, result_h());
1431 JVM_END
1432
1433 // Returns an array of Class objects.
1434 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1435 ResourceMark rm(THREAD);
1436
1437 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1438
1439 int num_classes = lce.num_loaded_classes();
1440 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1441 objArrayHandle classes_ah(THREAD, r);
1442
1443 for (int i = 0; i < num_classes; i++) {
1444 KlassHandle kh = lce.get_klass(i);
1445 oop mirror = kh()->java_mirror();
1446 classes_ah->obj_at_put(i, mirror);
1447 }
1448
1449 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1450 JVM_END
1451
1452 // Reset statistic. Return true if the requested statistic is reset.
1453 // Otherwise, return false.
1454 //
1455 // Input parameters:
1456 // obj - specify which instance the statistic associated with to be reset
1457 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1458 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1459 // type - the type of statistic to be reset
1460 //
1461 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1462 ResourceMark rm(THREAD);
1463
1464 switch (type) {
1465 case JMM_STAT_PEAK_THREAD_COUNT:
1466 ThreadService::reset_peak_thread_count();
1467 return true;
1468
1469 case JMM_STAT_THREAD_CONTENTION_COUNT:
1470 case JMM_STAT_THREAD_CONTENTION_TIME: {
1471 jlong tid = obj.j;
1472 if (tid < 0) {
1473 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1474 }
1475
1476 // Look for the JavaThread of this given tid
1477 MutexLockerEx ml(Threads_lock);
1478 if (tid == 0) {
1479 // reset contention statistics for all threads if tid == 0
1480 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1481 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1482 ThreadService::reset_contention_count_stat(java_thread);
1483 } else {
1484 ThreadService::reset_contention_time_stat(java_thread);
1485 }
1486 }
1487 } else {
1488 // reset contention statistics for a given thread
1489 JavaThread* java_thread = find_java_thread_from_id(tid);
1490 if (java_thread == NULL) {
1491 return false;
1492 }
1493
1494 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1495 ThreadService::reset_contention_count_stat(java_thread);
1496 } else {
1497 ThreadService::reset_contention_time_stat(java_thread);
1498 }
1499 }
1500 return true;
1501 break;
1502 }
1503 case JMM_STAT_PEAK_POOL_USAGE: {
1504 jobject o = obj.l;
1505 if (o == NULL) {
1506 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1507 }
1508
1509 oop pool_obj = JNIHandles::resolve(o);
1510 assert(pool_obj->is_instance(), "Should be an instanceOop");
1511 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1512
1513 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1514 if (pool != NULL) {
1515 pool->reset_peak_memory_usage();
1516 return true;
1517 }
1518 break;
1519 }
1520 case JMM_STAT_GC_STAT: {
1521 jobject o = obj.l;
1522 if (o == NULL) {
1523 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1524 }
1525
1526 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1527 if (mgr != NULL) {
1528 mgr->reset_gc_stat();
1529 return true;
1530 }
1531 break;
1532 }
1533 default:
1534 assert(0, "Unknown Statistic Type");
1535 }
1536 return false;
1537 JVM_END
1538
1539 // Returns the fast estimate of CPU time consumed by
1540 // a given thread (in nanoseconds).
1541 // If thread_id == 0, return CPU time for the current thread.
1542 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1543 if (!os::is_thread_cpu_time_supported()) {
1544 return -1;
1545 }
1546
1547 if (thread_id < 0) {
1548 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1549 "Invalid thread ID", -1);
1550 }
1551
1552 JavaThread* java_thread = NULL;
1553 if (thread_id == 0) {
1554 // current thread
1555 return os::current_thread_cpu_time();
1556 } else {
1557 MutexLockerEx ml(Threads_lock);
1558 java_thread = find_java_thread_from_id(thread_id);
1559 if (java_thread != NULL) {
1560 return os::thread_cpu_time((Thread*) java_thread);
1561 }
1562 }
1563 return -1;
1564 JVM_END
1565
1566 // Returns the CPU time consumed by a given thread (in nanoseconds).
1567 // If thread_id == 0, CPU time for the current thread is returned.
1568 // If user_sys_cpu_time = true, user level and system CPU time of
1569 // a given thread is returned; otherwise, only user level CPU time
1570 // is returned.
1571 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
1572 if (!os::is_thread_cpu_time_supported()) {
1573 return -1;
1574 }
1575
1576 if (thread_id < 0) {
1577 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1578 "Invalid thread ID", -1);
1579 }
1580
1581 JavaThread* java_thread = NULL;
1582 if (thread_id == 0) {
1583 // current thread
1584 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
1585 } else {
1586 MutexLockerEx ml(Threads_lock);
1587 java_thread = find_java_thread_from_id(thread_id);
1588 if (java_thread != NULL) {
1589 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
1590 }
1591 }
1592 return -1;
1593 JVM_END
1594
1595 // Gets an array containing the CPU times consumed by a set of threads
1596 // (in nanoseconds). Each element of the array is the CPU time for the
1597 // thread ID specified in the corresponding entry in the given array
1598 // of thread IDs; or -1 if the thread does not exist or has terminated.
1599 // If user_sys_cpu_time = true, the sum of user level and system CPU time
1600 // for the given thread is returned; otherwise, only user level CPU time
1601 // is returned.
1602 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
1603 jlongArray timeArray,
1604 jboolean user_sys_cpu_time))
1605 // Check if threads is null
1606 if (ids == NULL || timeArray == NULL) {
1607 THROW(vmSymbols::java_lang_NullPointerException());
1608 }
1609
1610 ResourceMark rm(THREAD);
1611 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1612 typeArrayHandle ids_ah(THREAD, ta);
1613
1614 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
1615 typeArrayHandle timeArray_h(THREAD, tia);
1616
1617 // validate the thread id array
1618 validate_thread_id_array(ids_ah, CHECK);
1619
1620 // timeArray must be of the same length as the given array of thread IDs
1621 int num_threads = ids_ah->length();
1622 if (num_threads != timeArray_h->length()) {
1623 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1624 "The length of the given long array does not match the length of "
1625 "the given array of thread IDs");
1626 }
1627
1628 MutexLockerEx ml(Threads_lock);
1629 for (int i = 0; i < num_threads; i++) {
1630 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i));
1631 if (java_thread != NULL) {
1632 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
1633 user_sys_cpu_time != 0));
1634 }
1635 }
1636 JVM_END
1637
1638 // Returns a String array of all VM global flag names
1639 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1640 // last flag entry is always NULL, so subtract 1
1641 int nFlags = (int) Flag::numFlags - 1;
1642 // allocate a temp array
1643 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1644 nFlags, CHECK_0);
1645 objArrayHandle flags_ah(THREAD, r);
1646 int num_entries = 0;
1647 for (int i = 0; i < nFlags; i++) {
1648 Flag* flag = &Flag::flags[i];
1649 // Exclude notproduct and develop flags in product builds.
1650 if (flag->is_constant_in_binary()) {
1651 continue;
1652 }
1653 // Exclude the locked (experimental, diagnostic) flags
1654 if (flag->is_unlocked() || flag->is_unlocker()) {
1655 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0);
1656 flags_ah->obj_at_put(num_entries, s());
1657 num_entries++;
1658 }
1659 }
1660
1661 if (num_entries < nFlags) {
1662 // Return array of right length
1663 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1664 for(int i = 0; i < num_entries; i++) {
1665 res->obj_at_put(i, flags_ah->obj_at(i));
1666 }
1667 return (jobjectArray)JNIHandles::make_local(env, res);
1668 }
1669
1670 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1671 JVM_END
1672
1673 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1674 // can't be determined, true otherwise. If false is returned, then *global
1675 // will be incomplete and invalid.
1676 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1677 Handle flag_name;
1678 if (name() == NULL) {
1679 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false);
1680 } else {
1681 flag_name = name;
1682 }
1683 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1684
1685 if (flag->is_bool()) {
1686 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1687 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1688 } else if (flag->is_intx()) {
1689 global->value.j = (jlong)flag->get_intx();
1690 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1691 } else if (flag->is_uintx()) {
1692 global->value.j = (jlong)flag->get_uintx();
1693 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1694 } else if (flag->is_uint64_t()) {
1695 global->value.j = (jlong)flag->get_uint64_t();
1696 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1697 } else if (flag->is_ccstr()) {
1698 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1699 global->value.l = (jobject)JNIHandles::make_local(env, str());
1700 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1701 } else {
1702 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1703 return false;
1704 }
1705
1706 global->writeable = flag->is_writeable();
1707 global->external = flag->is_external();
1708 switch (flag->get_origin()) {
1709 case Flag::DEFAULT:
1710 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1711 break;
1712 case Flag::COMMAND_LINE:
1713 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1714 break;
1715 case Flag::ENVIRON_VAR:
1716 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1717 break;
1718 case Flag::CONFIG_FILE:
1719 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1720 break;
1721 case Flag::MANAGEMENT:
1722 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1723 break;
1724 case Flag::ERGONOMIC:
1725 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1726 break;
1727 default:
1728 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1729 }
1730
1731 return true;
1732 }
1733
1734 // Fill globals array of count length with jmmVMGlobal entries
1735 // specified by names. If names == NULL, fill globals array
1736 // with all Flags. Return value is number of entries
1737 // created in globals.
1738 // If a Flag with a given name in an array element does not
1739 // exist, globals[i].name will be set to NULL.
1740 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1741 jobjectArray names,
1742 jmmVMGlobal *globals,
1743 jint count))
1744
1745
1746 if (globals == NULL) {
1747 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1748 }
1749
1750 ResourceMark rm(THREAD);
1751
1752 if (names != NULL) {
1753 // return the requested globals
1754 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1755 objArrayHandle names_ah(THREAD, ta);
1756 // Make sure we have a String array
1757 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1758 if (element_klass != SystemDictionary::String_klass()) {
1759 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1760 "Array element type is not String class", 0);
1761 }
1762
1763 int names_length = names_ah->length();
1764 int num_entries = 0;
1765 for (int i = 0; i < names_length && i < count; i++) {
1766 oop s = names_ah->obj_at(i);
1767 if (s == NULL) {
1768 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1769 }
1770
1771 Handle sh(THREAD, s);
1772 char* str = java_lang_String::as_utf8_string(s);
1773 Flag* flag = Flag::find_flag(str, strlen(str));
1774 if (flag != NULL &&
1775 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1776 num_entries++;
1777 } else {
1778 globals[i].name = NULL;
1779 }
1780 }
1781 return num_entries;
1782 } else {
1783 // return all globals if names == NULL
1784
1785 // last flag entry is always NULL, so subtract 1
1786 int nFlags = (int) Flag::numFlags - 1;
1787 Handle null_h;
1788 int num_entries = 0;
1789 for (int i = 0; i < nFlags && num_entries < count; i++) {
1790 Flag* flag = &Flag::flags[i];
1791 // Exclude notproduct and develop flags in product builds.
1792 if (flag->is_constant_in_binary()) {
1793 continue;
1794 }
1795 // Exclude the locked (diagnostic, experimental) flags
1796 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1797 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1798 num_entries++;
1799 }
1800 }
1801 return num_entries;
1802 }
1803 JVM_END
1804
1805 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1806 ResourceMark rm(THREAD);
1807
1808 oop fn = JNIHandles::resolve_external_guard(flag_name);
1809 if (fn == NULL) {
1810 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1811 "The flag name cannot be null.");
1812 }
1813 char* name = java_lang_String::as_utf8_string(fn);
1814 Flag* flag = Flag::find_flag(name, strlen(name));
1815 if (flag == NULL) {
1816 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1817 "Flag does not exist.");
1818 }
1819 if (!flag->is_writeable()) {
1820 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1821 "This flag is not writeable.");
1822 }
1823
1824 bool succeed;
1825 if (flag->is_bool()) {
1826 bool bvalue = (new_value.z == JNI_TRUE ? true : false);
1827 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT);
1828 } else if (flag->is_intx()) {
1829 intx ivalue = (intx)new_value.j;
1830 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT);
1831 } else if (flag->is_uintx()) {
1832 uintx uvalue = (uintx)new_value.j;
1833
1834 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) {
1835 FormatBuffer<80> err_msg("");
1836 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) {
1837 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1838 }
1839 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) {
1840 FormatBuffer<80> err_msg("");
1841 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) {
1842 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1843 }
1844 }
1845 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT);
1846 } else if (flag->is_uint64_t()) {
1847 uint64_t uvalue = (uint64_t)new_value.j;
1848 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT);
1849 } else if (flag->is_ccstr()) {
1850 oop str = JNIHandles::resolve_external_guard(new_value.l);
1851 if (str == NULL) {
1852 THROW(vmSymbols::java_lang_NullPointerException());
1853 }
1854 ccstr svalue = java_lang_String::as_utf8_string(str);
1855 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT);
1856 }
1857 assert(succeed, "Setting flag should succeed");
1858 JVM_END
1859
1860 class ThreadTimesClosure: public ThreadClosure {
1861 private:
1862 objArrayHandle _names_strings;
1863 char **_names_chars;
1864 typeArrayHandle _times;
1865 int _names_len;
1866 int _times_len;
1867 int _count;
1868
1869 public:
1870 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1871 ~ThreadTimesClosure();
1872 virtual void do_thread(Thread* thread);
1873 void do_unlocked();
1874 int count() { return _count; }
1875 };
1876
1877 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1878 typeArrayHandle times) {
1879 assert(names() != NULL, "names was NULL");
1880 assert(times() != NULL, "times was NULL");
1881 _names_strings = names;
1882 _names_len = names->length();
1883 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1884 _times = times;
1885 _times_len = times->length();
1886 _count = 0;
1887 }
1888
1889 //
1890 // Called with Threads_lock held
1891 //
1892 void ThreadTimesClosure::do_thread(Thread* thread) {
1893 assert(thread != NULL, "thread was NULL");
1894
1895 // exclude externally visible JavaThreads
1896 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1897 return;
1898 }
1899
1900 if (_count >= _names_len || _count >= _times_len) {
1901 // skip if the result array is not big enough
1902 return;
1903 }
1904
1905 EXCEPTION_MARK;
1906 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1907
1908 assert(thread->name() != NULL, "All threads should have a name");
1909 _names_chars[_count] = strdup(thread->name());
1910 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1911 os::thread_cpu_time(thread) : -1);
1912 _count++;
1913 }
1914
1915 // Called without Threads_lock, we can allocate String objects.
1916 void ThreadTimesClosure::do_unlocked() {
1917
1918 EXCEPTION_MARK;
1919 for (int i = 0; i < _count; i++) {
1920 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1921 _names_strings->obj_at_put(i, s());
1922 }
1923 }
1924
1925 ThreadTimesClosure::~ThreadTimesClosure() {
1926 for (int i = 0; i < _count; i++) {
1927 free(_names_chars[i]);
1928 }
1929 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal);
1930 }
1931
1932 // Fills names with VM internal thread names and times with the corresponding
1933 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1934 // If the element type of names is not String, an IllegalArgumentException is
1935 // thrown.
1936 // If an array is not large enough to hold all the entries, only the entries
1937 // that fit will be returned. Return value is the number of VM internal
1938 // threads entries.
1939 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1940 jobjectArray names,
1941 jlongArray times))
1942 if (names == NULL || times == NULL) {
1943 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1944 }
1945 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1946 objArrayHandle names_ah(THREAD, na);
1947
1948 // Make sure we have a String array
1949 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1950 if (element_klass != SystemDictionary::String_klass()) {
1951 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1952 "Array element type is not String class", 0);
1953 }
1954
1955 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1956 typeArrayHandle times_ah(THREAD, ta);
1957
1958 ThreadTimesClosure ttc(names_ah, times_ah);
1959 {
1960 MutexLockerEx ml(Threads_lock);
1961 Threads::threads_do(&ttc);
1962 }
1963 ttc.do_unlocked();
1964 return ttc.count();
1965 JVM_END
1966
1967 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1968 ResourceMark rm(THREAD);
1969
1970 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1971 VMThread::execute(&op);
1972
1973 DeadlockCycle* deadlocks = op.result();
1974 if (deadlocks == NULL) {
1975 // no deadlock found and return
1976 return Handle();
1977 }
1978
1979 int num_threads = 0;
1980 DeadlockCycle* cycle;
1981 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1982 num_threads += cycle->num_threads();
1983 }
1984
1985 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1986 objArrayHandle threads_ah(THREAD, r);
1987
1988 int index = 0;
1989 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1990 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1991 int len = deadlock_threads->length();
1992 for (int i = 0; i < len; i++) {
1993 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1994 index++;
1995 }
1996 }
1997 return threads_ah;
1998 }
1999
2000 // Finds cycles of threads that are deadlocked involved in object monitors
2001 // and JSR-166 synchronizers.
2002 // Returns an array of Thread objects which are in deadlock, if any.
2003 // Otherwise, returns NULL.
2004 //
2005 // Input parameter:
2006 // object_monitors_only - if true, only check object monitors
2007 //
2008 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
2009 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
2010 return (jobjectArray) JNIHandles::make_local(env, result());
2011 JVM_END
2012
2013 // Finds cycles of threads that are deadlocked on monitor locks
2014 // Returns an array of Thread objects which are in deadlock, if any.
2015 // Otherwise, returns NULL.
2016 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
2017 Handle result = find_deadlocks(true, CHECK_0);
2018 return (jobjectArray) JNIHandles::make_local(env, result());
2019 JVM_END
2020
2021 // Gets the information about GC extension attributes including
2022 // the name of the attribute, its type, and a short description.
2023 //
2024 // Input parameters:
2025 // mgr - GC memory manager
2026 // info - caller allocated array of jmmExtAttributeInfo
2027 // count - number of elements of the info array
2028 //
2029 // Returns the number of GC extension attributes filled in the info array; or
2030 // -1 if info is not big enough
2031 //
2032 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
2033 // All GC memory managers have 1 attribute (number of GC threads)
2034 if (count == 0) {
2035 return 0;
2036 }
2037
2038 if (info == NULL) {
2039 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
2040 }
2041
2042 info[0].name = "GcThreadCount";
2043 info[0].type = 'I';
2044 info[0].description = "Number of GC threads";
2045 return 1;
2046 JVM_END
2047
2048 // verify the given array is an array of java/lang/management/MemoryUsage objects
2049 // of a given length and return the objArrayOop
2050 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
2051 if (array == NULL) {
2052 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
2053 }
2054
2055 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
2056 objArrayHandle array_h(THREAD, oa);
2057
2058 // array must be of the given length
2059 if (length != array_h->length()) {
2060 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2061 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
2062 }
2063
2064 // check if the element of array is of type MemoryUsage class
2065 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
2066 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
2067 if (element_klass != usage_klass) {
2068 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2069 "The element type is not MemoryUsage class", 0);
2070 }
2071
2072 return array_h();
2073 }
2074
2075 // Gets the statistics of the last GC of a given GC memory manager.
2076 // Input parameters:
2077 // obj - GarbageCollectorMXBean object
2078 // gc_stat - caller allocated jmmGCStat where:
2079 // a. before_gc_usage - array of MemoryUsage objects
2080 // b. after_gc_usage - array of MemoryUsage objects
2081 // c. gc_ext_attributes_values_size is set to the
2082 // gc_ext_attribute_values array allocated
2083 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
2084 //
2085 // On return,
2086 // gc_index == 0 indicates no GC statistics available
2087 //
2088 // before_gc_usage and after_gc_usage - filled with per memory pool
2089 // before and after GC usage in the same order as the memory pools
2090 // returned by GetMemoryPools for a given GC memory manager.
2091 // num_gc_ext_attributes indicates the number of elements in
2092 // the gc_ext_attribute_values array is filled; or
2093 // -1 if the gc_ext_attributes_values array is not big enough
2094 //
2095 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
2096 ResourceMark rm(THREAD);
2097
2098 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
2099 THROW(vmSymbols::java_lang_NullPointerException());
2100 }
2101
2102 // Get the GCMemoryManager
2103 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2104
2105 // Make a copy of the last GC statistics
2106 // GC may occur while constructing the last GC information
2107 int num_pools = MemoryService::num_memory_pools();
2108 GCStatInfo stat(num_pools);
2109 if (mgr->get_last_gc_stat(&stat) == 0) {
2110 gc_stat->gc_index = 0;
2111 return;
2112 }
2113
2114 gc_stat->gc_index = stat.gc_index();
2115 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
2116 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
2117
2118 // Current implementation does not have GC extension attributes
2119 gc_stat->num_gc_ext_attributes = 0;
2120
2121 // Fill the arrays of MemoryUsage objects with before and after GC
2122 // per pool memory usage
2123 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
2124 num_pools,
2125 CHECK);
2126 objArrayHandle usage_before_gc_ah(THREAD, bu);
2127
2128 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
2129 num_pools,
2130 CHECK);
2131 objArrayHandle usage_after_gc_ah(THREAD, au);
2132
2133 for (int i = 0; i < num_pools; i++) {
2134 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
2135 Handle after_usage;
2136
2137 MemoryUsage u = stat.after_gc_usage_for_pool(i);
2138 if (u.max_size() == 0 && u.used() > 0) {
2139 // If max size == 0, this pool is a survivor space.
2140 // Set max size = -1 since the pools will be swapped after GC.
2141 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
2142 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
2143 } else {
2144 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
2145 }
2146 usage_before_gc_ah->obj_at_put(i, before_usage());
2147 usage_after_gc_ah->obj_at_put(i, after_usage());
2148 }
2149
2150 if (gc_stat->gc_ext_attribute_values_size > 0) {
2151 // Current implementation only has 1 attribute (number of GC threads)
2152 // The type is 'I'
2153 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2154 }
2155 JVM_END
2156
2157 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2158 ResourceMark rm(THREAD);
2159 // Get the GCMemoryManager
2160 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2161 mgr->set_notification_enabled(enabled?true:false);
2162 JVM_END
2163
2164 // Dump heap - Returns 0 if succeeds.
2165 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2166 #if INCLUDE_SERVICES
2167 ResourceMark rm(THREAD);
2168 oop on = JNIHandles::resolve_external_guard(outputfile);
2169 if (on == NULL) {
2170 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2171 "Output file name cannot be null.", -1);
2172 }
2173 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1));
2174 if (name == NULL) {
2175 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2176 "Output file name cannot be null.", -1);
2177 }
2178 HeapDumper dumper(live ? true : false);
2179 if (dumper.dump(name) != 0) {
2180 const char* errmsg = dumper.error_as_C_string();
2181 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2182 }
2183 return 0;
2184 #else // INCLUDE_SERVICES
2185 return -1;
2186 #endif // INCLUDE_SERVICES
2187 JVM_END
2188
2189 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2190 ResourceMark rm(THREAD);
2191 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2192 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2193 dcmd_list->length(), CHECK_NULL);
2194 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2195 for (int i = 0; i < dcmd_list->length(); i++) {
2196 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2197 cmd_array->obj_at_put(i, cmd_name);
2198 }
2199 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2200 JVM_END
2201
2202 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2203 dcmdInfo* infoArray))
2204 if (cmds == NULL || infoArray == NULL) {
2205 THROW(vmSymbols::java_lang_NullPointerException());
2206 }
2207
2208 ResourceMark rm(THREAD);
2209
2210 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2211 objArrayHandle cmds_ah(THREAD, ca);
2212
2213 // Make sure we have a String array
2214 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2215 if (element_klass != SystemDictionary::String_klass()) {
2216 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2217 "Array element type is not String class");
2218 }
2219
2220 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2221
2222 int num_cmds = cmds_ah->length();
2223 for (int i = 0; i < num_cmds; i++) {
2224 oop cmd = cmds_ah->obj_at(i);
2225 if (cmd == NULL) {
2226 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2227 "Command name cannot be null.");
2228 }
2229 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2230 if (cmd_name == NULL) {
2231 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2232 "Command name cannot be null.");
2233 }
2234 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2235 if (pos == -1) {
2236 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2237 "Unknown diagnostic command");
2238 }
2239 DCmdInfo* info = info_list->at(pos);
2240 infoArray[i].name = info->name();
2241 infoArray[i].description = info->description();
2242 infoArray[i].impact = info->impact();
2243 JavaPermission p = info->permission();
2244 infoArray[i].permission_class = p._class;
2245 infoArray[i].permission_name = p._name;
2246 infoArray[i].permission_action = p._action;
2247 infoArray[i].num_arguments = info->num_arguments();
2248 infoArray[i].enabled = info->is_enabled();
2249 }
2250 JVM_END
2251
2252 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2253 jstring command, dcmdArgInfo* infoArray))
2254 ResourceMark rm(THREAD);
2255 oop cmd = JNIHandles::resolve_external_guard(command);
2256 if (cmd == NULL) {
2257 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2258 "Command line cannot be null.");
2259 }
2260 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2261 if (cmd_name == NULL) {
2262 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2263 "Command line content cannot be null.");
2264 }
2265 DCmd* dcmd = NULL;
2266 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2267 strlen(cmd_name));
2268 if (factory != NULL) {
2269 dcmd = factory->create_resource_instance(NULL);
2270 }
2271 if (dcmd == NULL) {
2272 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2273 "Unknown diagnostic command");
2274 }
2275 DCmdMark mark(dcmd);
2276 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2277 if (array->length() == 0) {
2278 return;
2279 }
2280 for (int i = 0; i < array->length(); i++) {
2281 infoArray[i].name = array->at(i)->name();
2282 infoArray[i].description = array->at(i)->description();
2283 infoArray[i].type = array->at(i)->type();
2284 infoArray[i].default_string = array->at(i)->default_string();
2285 infoArray[i].mandatory = array->at(i)->is_mandatory();
2286 infoArray[i].option = array->at(i)->is_option();
2287 infoArray[i].multiple = array->at(i)->is_multiple();
2288 infoArray[i].position = array->at(i)->position();
2289 }
2290 return;
2291 JVM_END
2292
2293 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2294 ResourceMark rm(THREAD);
2295 oop cmd = JNIHandles::resolve_external_guard(commandline);
2296 if (cmd == NULL) {
2297 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2298 "Command line cannot be null.");
2299 }
2300 char* cmdline = java_lang_String::as_utf8_string(cmd);
2301 if (cmdline == NULL) {
2302 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2303 "Command line content cannot be null.");
2304 }
2305 bufferedStream output;
2306 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2307 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2308 return (jstring) JNIHandles::make_local(env, result);
2309 JVM_END
2310
2311 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2312 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2313 JVM_END
2314
2315 jlong Management::ticks_to_ms(jlong ticks) {
2316 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2317 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2318 * (double)1000.0);
2319 }
2320
2321 const struct jmmInterface_1_ jmm_interface = {
2322 NULL,
2323 NULL,
2324 jmm_GetVersion,
2325 jmm_GetOptionalSupport,
2326 jmm_GetInputArguments,
2327 jmm_GetThreadInfo,
2328 jmm_GetInputArgumentArray,
2329 jmm_GetMemoryPools,
2330 jmm_GetMemoryManagers,
2331 jmm_GetMemoryPoolUsage,
2332 jmm_GetPeakMemoryPoolUsage,
2333 jmm_GetThreadAllocatedMemory,
2334 jmm_GetMemoryUsage,
2335 jmm_GetLongAttribute,
2336 jmm_GetBoolAttribute,
2337 jmm_SetBoolAttribute,
2338 jmm_GetLongAttributes,
2339 jmm_FindMonitorDeadlockedThreads,
2340 jmm_GetThreadCpuTime,
2341 jmm_GetVMGlobalNames,
2342 jmm_GetVMGlobals,
2343 jmm_GetInternalThreadTimes,
2344 jmm_ResetStatistic,
2345 jmm_SetPoolSensor,
2346 jmm_SetPoolThreshold,
2347 jmm_GetPoolCollectionUsage,
2348 jmm_GetGCExtAttributeInfo,
2349 jmm_GetLastGCStat,
2350 jmm_GetThreadCpuTimeWithKind,
2351 jmm_GetThreadCpuTimesWithKind,
2352 jmm_DumpHeap0,
2353 jmm_FindDeadlockedThreads,
2354 jmm_SetVMGlobal,
2355 NULL,
2356 jmm_DumpThreads,
2357 jmm_SetGCNotificationEnabled,
2358 jmm_GetDiagnosticCommands,
2359 jmm_GetDiagnosticCommandInfo,
2360 jmm_GetDiagnosticCommandArgumentsInfo,
2361 jmm_ExecuteDiagnosticCommand,
2362 jmm_SetDiagnosticFrameworkNotificationEnabled
2363 };
2364 #endif // INCLUDE_MANAGEMENT
2365
2366 void* Management::get_jmm_interface(int version) {
2367 #if INCLUDE_MANAGEMENT
2368 if (version == JMM_VERSION_1_0) {
2369 return (void*) &jmm_interface;
2370 }
2371 #endif // INCLUDE_MANAGEMENT
2372 return NULL;
2373 }