1 /*
2 * Copyright (c) 2003, 2014, 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 "runtime/thread.inline.hpp"
43 #include "services/classLoadingService.hpp"
44 #include "services/diagnosticCommand.hpp"
45 #include "services/diagnosticFramework.hpp"
46 #include "services/heapDumper.hpp"
47 #include "services/jmm.h"
48 #include "services/lowMemoryDetector.hpp"
49 #include "services/gcNotifier.hpp"
50 #include "services/nmtDCmd.hpp"
51 #include "services/management.hpp"
52 #include "services/memoryManager.hpp"
53 #include "services/memoryPool.hpp"
54 #include "services/memoryService.hpp"
55 #include "services/runtimeService.hpp"
56 #include "services/threadService.hpp"
57 #include "utilities/macros.hpp"
58
59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
60
61 PerfVariable* Management::_begin_vm_creation_time = NULL;
62 PerfVariable* Management::_end_vm_creation_time = NULL;
63 PerfVariable* Management::_vm_init_done_time = NULL;
64
65 Klass* Management::_sensor_klass = NULL;
66 Klass* Management::_threadInfo_klass = NULL;
67 Klass* Management::_memoryUsage_klass = NULL;
68 Klass* Management::_memoryPoolMXBean_klass = NULL;
69 Klass* Management::_memoryManagerMXBean_klass = NULL;
70 Klass* Management::_garbageCollectorMXBean_klass = NULL;
71 Klass* Management::_managementFactory_klass = NULL;
72 Klass* Management::_garbageCollectorImpl_klass = NULL;
73 Klass* Management::_gcInfo_klass = NULL;
74 Klass* Management::_diagnosticCommandImpl_klass = NULL;
75 Klass* Management::_managementFactoryHelper_klass = NULL;
76
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_fail(vmSymbols::sun_management_Agent(),
159 loader,
160 Handle(),
161 true,
162 CHECK);
163 instanceKlassHandle ik (THREAD, k);
164
165 JavaValue result(T_VOID);
166 JavaCalls::call_static(&result,
167 ik,
168 vmSymbols::startAgent_name(),
169 vmSymbols::void_method_signature(),
170 CHECK);
171 }
172 }
173
174 void Management::get_optional_support(jmmOptionalSupport* support) {
175 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
176 }
177
178 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
179 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
180 instanceKlassHandle ik (THREAD, k);
181 if (ik->should_be_initialized()) {
182 ik->initialize(CHECK_NULL);
183 }
184 // If these classes change to not be owned by the boot loader, they need
185 // to be walked to keep their class loader alive in oops_do.
186 assert(ik->class_loader() == NULL, "need to follow in oops_do");
187 return ik();
188 }
189
190 void Management::record_vm_startup_time(jlong begin, jlong duration) {
191 // if the performance counter is not initialized,
192 // then vm initialization failed; simply return.
193 if (_begin_vm_creation_time == NULL) return;
194
195 _begin_vm_creation_time->set_value(begin);
196 _end_vm_creation_time->set_value(begin + duration);
197 PerfMemory::set_accessible(true);
198 }
199
200 jlong Management::timestamp() {
201 TimeStamp t;
202 t.update();
203 return t.ticks() - _stamp.ticks();
204 }
205
206 void Management::oops_do(OopClosure* f) {
207 MemoryService::oops_do(f);
208 ThreadService::oops_do(f);
209 }
210
211 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
212 if (_threadInfo_klass == NULL) {
213 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
214 }
215 return _threadInfo_klass;
216 }
217
218 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
219 if (_memoryUsage_klass == NULL) {
220 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
221 }
222 return _memoryUsage_klass;
223 }
224
225 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
226 if (_memoryPoolMXBean_klass == NULL) {
227 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
228 }
229 return _memoryPoolMXBean_klass;
230 }
231
232 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
233 if (_memoryManagerMXBean_klass == NULL) {
234 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
235 }
236 return _memoryManagerMXBean_klass;
237 }
238
239 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
240 if (_garbageCollectorMXBean_klass == NULL) {
241 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
242 }
243 return _garbageCollectorMXBean_klass;
244 }
245
246 Klass* Management::sun_management_Sensor_klass(TRAPS) {
247 if (_sensor_klass == NULL) {
248 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
249 }
250 return _sensor_klass;
251 }
252
253 Klass* Management::sun_management_ManagementFactory_klass(TRAPS) {
254 if (_managementFactory_klass == NULL) {
255 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL);
256 }
257 return _managementFactory_klass;
258 }
259
260 Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) {
261 if (_garbageCollectorImpl_klass == NULL) {
262 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL);
263 }
264 return _garbageCollectorImpl_klass;
265 }
266
267 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) {
268 if (_gcInfo_klass == NULL) {
269 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
270 }
271 return _gcInfo_klass;
272 }
273
274 Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) {
275 if (_diagnosticCommandImpl_klass == NULL) {
276 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL);
277 }
278 return _diagnosticCommandImpl_klass;
279 }
280
281 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
282 if (_managementFactoryHelper_klass == NULL) {
283 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
284 }
285 return _managementFactoryHelper_klass;
286 }
287
288 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
289 Handle snapshot_thread(THREAD, snapshot->threadObj());
290
291 jlong contended_time;
292 jlong waited_time;
293 if (ThreadService::is_thread_monitoring_contention()) {
294 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
295 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
296 } else {
297 // set them to -1 if thread contention monitoring is disabled.
298 contended_time = max_julong;
299 waited_time = max_julong;
300 }
301
302 int thread_status = snapshot->thread_status();
303 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
304 if (snapshot->is_ext_suspended()) {
305 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
306 }
307 if (snapshot->is_in_native()) {
308 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
309 }
310
311 ThreadStackTrace* st = snapshot->get_stack_trace();
312 Handle stacktrace_h;
313 if (st != NULL) {
314 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
315 } else {
316 stacktrace_h = Handle();
317 }
318
319 args->push_oop(snapshot_thread);
320 args->push_int(thread_status);
321 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
322 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
323 args->push_long(snapshot->contended_enter_count());
324 args->push_long(contended_time);
325 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
326 args->push_long(waited_time);
327 args->push_oop(stacktrace_h);
328 }
329
330 // Helper function to construct a ThreadInfo object
331 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
332 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
333 instanceKlassHandle ik (THREAD, k);
334
335 JavaValue result(T_VOID);
336 JavaCallArguments args(14);
337
338 // First allocate a ThreadObj object and
339 // push the receiver as the first argument
340 Handle element = ik->allocate_instance_handle(CHECK_NULL);
341 args.push_oop(element);
342
343 // initialize the arguments for the ThreadInfo constructor
344 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
345
346 // Call ThreadInfo constructor with no locked monitors and synchronizers
347 JavaCalls::call_special(&result,
348 ik,
349 vmSymbols::object_initializer_name(),
350 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
351 &args,
352 CHECK_NULL);
353
354 return (instanceOop) element();
355 }
356
357 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
358 objArrayHandle monitors_array,
359 typeArrayHandle depths_array,
360 objArrayHandle synchronizers_array,
361 TRAPS) {
362 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
363 instanceKlassHandle ik (THREAD, k);
364
365 JavaValue result(T_VOID);
366 JavaCallArguments args(17);
367
368 // First allocate a ThreadObj object and
369 // push the receiver as the first argument
370 Handle element = ik->allocate_instance_handle(CHECK_NULL);
371 args.push_oop(element);
372
373 // initialize the arguments for the ThreadInfo constructor
374 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
375
376 // push the locked monitors and synchronizers in the arguments
377 args.push_oop(monitors_array);
378 args.push_oop(depths_array);
379 args.push_oop(synchronizers_array);
380
381 // Call ThreadInfo constructor with locked monitors and synchronizers
382 JavaCalls::call_special(&result,
383 ik,
384 vmSymbols::object_initializer_name(),
385 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
386 &args,
387 CHECK_NULL);
388
389 return (instanceOop) element();
390 }
391
392 // Helper functions
393 static JavaThread* find_java_thread_from_id(jlong thread_id) {
394 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock");
395
396 JavaThread* java_thread = NULL;
397 // Sequential search for now. Need to do better optimization later.
398 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) {
399 oop tobj = thread->threadObj();
400 if (!thread->is_exiting() &&
401 tobj != NULL &&
402 thread_id == java_lang_Thread::thread_id(tobj)) {
403 java_thread = thread;
404 break;
405 }
406 }
407 return java_thread;
408 }
409
410 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
411 if (mgr == NULL) {
412 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
413 }
414 oop mgr_obj = JNIHandles::resolve(mgr);
415 instanceHandle h(THREAD, (instanceOop) mgr_obj);
416
417 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
418 if (!h->is_a(k)) {
419 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
420 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
421 NULL);
422 }
423
424 MemoryManager* gc = MemoryService::get_memory_manager(h);
425 if (gc == NULL || !gc->is_gc_memory_manager()) {
426 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
427 "Invalid GC memory manager",
428 NULL);
429 }
430 return (GCMemoryManager*) gc;
431 }
432
433 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
434 if (obj == NULL) {
435 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
436 }
437
438 oop pool_obj = JNIHandles::resolve(obj);
439 assert(pool_obj->is_instance(), "Should be an instanceOop");
440 instanceHandle ph(THREAD, (instanceOop) pool_obj);
441
442 return MemoryService::get_memory_pool(ph);
443 }
444
445 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
446 int num_threads = ids_ah->length();
447
448 // Validate input thread IDs
449 int i = 0;
450 for (i = 0; i < num_threads; i++) {
451 jlong tid = ids_ah->long_at(i);
452 if (tid <= 0) {
453 // throw exception if invalid thread id.
454 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
455 "Invalid thread ID entry");
456 }
457 }
458 }
459
460 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
461 // check if the element of infoArray is of type ThreadInfo class
462 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
463 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
464 if (element_klass != threadinfo_klass) {
465 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
466 "infoArray element type is not ThreadInfo class");
467 }
468 }
469
470
471 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
472 if (obj == NULL) {
473 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
474 }
475
476 oop mgr_obj = JNIHandles::resolve(obj);
477 assert(mgr_obj->is_instance(), "Should be an instanceOop");
478 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
479
480 return MemoryService::get_memory_manager(mh);
481 }
482
483 // Returns a version string and sets major and minor version if
484 // the input parameters are non-null.
485 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
486 return JMM_VERSION;
487 JVM_END
488
489 // Gets the list of VM monitoring and management optional supports
490 // Returns 0 if succeeded; otherwise returns non-zero.
491 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
492 if (support == NULL) {
493 return -1;
494 }
495 Management::get_optional_support(support);
496 return 0;
497 JVM_END
498
499 // Returns a java.lang.String object containing the input arguments to the VM.
500 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
501 ResourceMark rm(THREAD);
502
503 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
504 return NULL;
505 }
506
507 char** vm_flags = Arguments::jvm_flags_array();
508 char** vm_args = Arguments::jvm_args_array();
509 int num_flags = Arguments::num_jvm_flags();
510 int num_args = Arguments::num_jvm_args();
511
512 size_t length = 1; // null terminator
513 int i;
514 for (i = 0; i < num_flags; i++) {
515 length += strlen(vm_flags[i]);
516 }
517 for (i = 0; i < num_args; i++) {
518 length += strlen(vm_args[i]);
519 }
520 // add a space between each argument
521 length += num_flags + num_args - 1;
522
523 // Return the list of input arguments passed to the VM
524 // and preserve the order that the VM processes.
525 char* args = NEW_RESOURCE_ARRAY(char, length);
526 args[0] = '\0';
527 // concatenate all jvm_flags
528 if (num_flags > 0) {
529 strcat(args, vm_flags[0]);
530 for (i = 1; i < num_flags; i++) {
531 strcat(args, " ");
532 strcat(args, vm_flags[i]);
533 }
534 }
535
536 if (num_args > 0 && num_flags > 0) {
537 // append a space if args already contains one or more jvm_flags
538 strcat(args, " ");
539 }
540
541 // concatenate all jvm_args
542 if (num_args > 0) {
543 strcat(args, vm_args[0]);
544 for (i = 1; i < num_args; i++) {
545 strcat(args, " ");
546 strcat(args, vm_args[i]);
547 }
548 }
549
550 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
551 return JNIHandles::make_local(env, hargs());
552 JVM_END
553
554 // Returns an array of java.lang.String object containing the input arguments to the VM.
555 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
556 ResourceMark rm(THREAD);
557
558 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
559 return NULL;
560 }
561
562 char** vm_flags = Arguments::jvm_flags_array();
563 char** vm_args = Arguments::jvm_args_array();
564 int num_flags = Arguments::num_jvm_flags();
565 int num_args = Arguments::num_jvm_args();
566
567 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass());
568 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
569 objArrayHandle result_h(THREAD, r);
570
571 int index = 0;
572 for (int j = 0; j < num_flags; j++, index++) {
573 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
574 result_h->obj_at_put(index, h());
575 }
576 for (int i = 0; i < num_args; i++, index++) {
577 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
578 result_h->obj_at_put(index, h());
579 }
580 return (jobjectArray) JNIHandles::make_local(env, result_h());
581 JVM_END
582
583 // Returns an array of java/lang/management/MemoryPoolMXBean object
584 // one for each memory pool if obj == null; otherwise returns
585 // an array of memory pools for a given memory manager if
586 // it is a valid memory manager.
587 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
588 ResourceMark rm(THREAD);
589
590 int num_memory_pools;
591 MemoryManager* mgr = NULL;
592 if (obj == NULL) {
593 num_memory_pools = MemoryService::num_memory_pools();
594 } else {
595 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
596 if (mgr == NULL) {
597 return NULL;
598 }
599 num_memory_pools = mgr->num_memory_pools();
600 }
601
602 // Allocate the resulting MemoryPoolMXBean[] object
603 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
604 instanceKlassHandle ik (THREAD, k);
605 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
606 objArrayHandle poolArray(THREAD, r);
607
608 if (mgr == NULL) {
609 // Get all memory pools
610 for (int i = 0; i < num_memory_pools; i++) {
611 MemoryPool* pool = MemoryService::get_memory_pool(i);
612 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
613 instanceHandle ph(THREAD, p);
614 poolArray->obj_at_put(i, ph());
615 }
616 } else {
617 // Get memory pools managed by a given memory manager
618 for (int i = 0; i < num_memory_pools; i++) {
619 MemoryPool* pool = mgr->get_memory_pool(i);
620 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
621 instanceHandle ph(THREAD, p);
622 poolArray->obj_at_put(i, ph());
623 }
624 }
625 return (jobjectArray) JNIHandles::make_local(env, poolArray());
626 JVM_END
627
628 // Returns an array of java/lang/management/MemoryManagerMXBean object
629 // one for each memory manager if obj == null; otherwise returns
630 // an array of memory managers for a given memory pool if
631 // it is a valid memory pool.
632 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
633 ResourceMark rm(THREAD);
634
635 int num_mgrs;
636 MemoryPool* pool = NULL;
637 if (obj == NULL) {
638 num_mgrs = MemoryService::num_memory_managers();
639 } else {
640 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
641 if (pool == NULL) {
642 return NULL;
643 }
644 num_mgrs = pool->num_memory_managers();
645 }
646
647 // Allocate the resulting MemoryManagerMXBean[] object
648 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
649 instanceKlassHandle ik (THREAD, k);
650 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
651 objArrayHandle mgrArray(THREAD, r);
652
653 if (pool == NULL) {
654 // Get all memory managers
655 for (int i = 0; i < num_mgrs; i++) {
656 MemoryManager* mgr = MemoryService::get_memory_manager(i);
657 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
658 instanceHandle ph(THREAD, p);
659 mgrArray->obj_at_put(i, ph());
660 }
661 } else {
662 // Get memory managers for a given memory pool
663 for (int i = 0; i < num_mgrs; i++) {
664 MemoryManager* mgr = pool->get_memory_manager(i);
665 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
666 instanceHandle ph(THREAD, p);
667 mgrArray->obj_at_put(i, ph());
668 }
669 }
670 return (jobjectArray) JNIHandles::make_local(env, mgrArray());
671 JVM_END
672
673
674 // Returns a java/lang/management/MemoryUsage object containing the memory usage
675 // of a given memory pool.
676 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
677 ResourceMark rm(THREAD);
678
679 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
680 if (pool != NULL) {
681 MemoryUsage usage = pool->get_memory_usage();
682 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
683 return JNIHandles::make_local(env, h());
684 } else {
685 return NULL;
686 }
687 JVM_END
688
689 // Returns a java/lang/management/MemoryUsage object containing the memory usage
690 // of a given memory pool.
691 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
692 ResourceMark rm(THREAD);
693
694 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
695 if (pool != NULL) {
696 MemoryUsage usage = pool->get_peak_memory_usage();
697 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
698 return JNIHandles::make_local(env, h());
699 } else {
700 return NULL;
701 }
702 JVM_END
703
704 // Returns a java/lang/management/MemoryUsage object containing the memory usage
705 // of a given memory pool after most recent GC.
706 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
707 ResourceMark rm(THREAD);
708
709 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
710 if (pool != NULL && pool->is_collected_pool()) {
711 MemoryUsage usage = pool->get_last_collection_usage();
712 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
713 return JNIHandles::make_local(env, h());
714 } else {
715 return NULL;
716 }
717 JVM_END
718
719 // Sets the memory pool sensor for a threshold type
720 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
721 if (obj == NULL || sensorObj == NULL) {
722 THROW(vmSymbols::java_lang_NullPointerException());
723 }
724
725 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
726 oop s = JNIHandles::resolve(sensorObj);
727 assert(s->is_instance(), "Sensor should be an instanceOop");
728 instanceHandle sensor_h(THREAD, (instanceOop) s);
729 if (!sensor_h->is_a(sensor_klass)) {
730 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
731 "Sensor is not an instance of sun.management.Sensor class");
732 }
733
734 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
735 assert(mpool != NULL, "MemoryPool should exist");
736
737 switch (type) {
738 case JMM_USAGE_THRESHOLD_HIGH:
739 case JMM_USAGE_THRESHOLD_LOW:
740 // have only one sensor for threshold high and low
741 mpool->set_usage_sensor_obj(sensor_h);
742 break;
743 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
744 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
745 // have only one sensor for threshold high and low
746 mpool->set_gc_usage_sensor_obj(sensor_h);
747 break;
748 default:
749 assert(false, "Unrecognized type");
750 }
751
752 JVM_END
753
754
755 // Sets the threshold of a given memory pool.
756 // Returns the previous threshold.
757 //
758 // Input parameters:
759 // pool - the MemoryPoolMXBean object
760 // type - threshold type
761 // threshold - the new threshold (must not be negative)
762 //
763 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
764 if (threshold < 0) {
765 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
766 "Invalid threshold value",
767 -1);
768 }
769
770 if ((size_t)threshold > max_uintx) {
771 stringStream st;
772 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx);
773 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
774 }
775
776 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
777 assert(pool != NULL, "MemoryPool should exist");
778
779 jlong prev = 0;
780 switch (type) {
781 case JMM_USAGE_THRESHOLD_HIGH:
782 if (!pool->usage_threshold()->is_high_threshold_supported()) {
783 return -1;
784 }
785 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
786 break;
787
788 case JMM_USAGE_THRESHOLD_LOW:
789 if (!pool->usage_threshold()->is_low_threshold_supported()) {
790 return -1;
791 }
792 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
793 break;
794
795 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
796 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
797 return -1;
798 }
799 // return and the new threshold is effective for the next GC
800 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
801
802 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
803 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
804 return -1;
805 }
806 // return and the new threshold is effective for the next GC
807 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
808
809 default:
810 assert(false, "Unrecognized type");
811 return -1;
812 }
813
814 // When the threshold is changed, reevaluate if the low memory
815 // detection is enabled.
816 if (prev != threshold) {
817 LowMemoryDetector::recompute_enabled_for_collected_pools();
818 LowMemoryDetector::detect_low_memory(pool);
819 }
820 return prev;
821 JVM_END
822
823 // Gets an array containing the amount of memory allocated on the Java
824 // heap for a set of threads (in bytes). Each element of the array is
825 // the amount of memory allocated for the thread ID specified in the
826 // corresponding entry in the given array of thread IDs; or -1 if the
827 // thread does not exist or has terminated.
828 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
829 jlongArray sizeArray))
830 // Check if threads is null
831 if (ids == NULL || sizeArray == NULL) {
832 THROW(vmSymbols::java_lang_NullPointerException());
833 }
834
835 ResourceMark rm(THREAD);
836 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
837 typeArrayHandle ids_ah(THREAD, ta);
838
839 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
840 typeArrayHandle sizeArray_h(THREAD, sa);
841
842 // validate the thread id array
843 validate_thread_id_array(ids_ah, CHECK);
844
845 // sizeArray must be of the same length as the given array of thread IDs
846 int num_threads = ids_ah->length();
847 if (num_threads != sizeArray_h->length()) {
848 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
849 "The length of the given long array does not match the length of "
850 "the given array of thread IDs");
851 }
852
853 MutexLockerEx ml(Threads_lock);
854 for (int i = 0; i < num_threads; i++) {
855 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i));
856 if (java_thread != NULL) {
857 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
858 }
859 }
860 JVM_END
861
862 // Returns a java/lang/management/MemoryUsage object representing
863 // the memory usage for the heap or non-heap memory.
864 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
865 ResourceMark rm(THREAD);
866
867 // Calculate the memory usage
868 size_t total_init = 0;
869 size_t total_used = 0;
870 size_t total_committed = 0;
871 size_t total_max = 0;
872 bool has_undefined_init_size = false;
873 bool has_undefined_max_size = false;
874
875 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
876 MemoryPool* pool = MemoryService::get_memory_pool(i);
877 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
878 MemoryUsage u = pool->get_memory_usage();
879 total_used += u.used();
880 total_committed += u.committed();
881
882 if (u.init_size() == (size_t)-1) {
883 has_undefined_init_size = true;
884 }
885 if (!has_undefined_init_size) {
886 total_init += u.init_size();
887 }
888
889 if (u.max_size() == (size_t)-1) {
890 has_undefined_max_size = true;
891 }
892 if (!has_undefined_max_size) {
893 total_max += u.max_size();
894 }
895 }
896 }
897
898 // if any one of the memory pool has undefined init_size or max_size,
899 // set it to -1
900 if (has_undefined_init_size) {
901 total_init = (size_t)-1;
902 }
903 if (has_undefined_max_size) {
904 total_max = (size_t)-1;
905 }
906
907 MemoryUsage usage((heap ? InitialHeapSize : total_init),
908 total_used,
909 total_committed,
910 (heap ? Universe::heap()->max_capacity() : total_max));
911
912 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
913 return JNIHandles::make_local(env, obj());
914 JVM_END
915
916 // Returns the boolean value of a given attribute.
917 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
918 switch (att) {
919 case JMM_VERBOSE_GC:
920 return MemoryService::get_verbose();
921 case JMM_VERBOSE_CLASS:
922 return ClassLoadingService::get_verbose();
923 case JMM_THREAD_CONTENTION_MONITORING:
924 return ThreadService::is_thread_monitoring_contention();
925 case JMM_THREAD_CPU_TIME:
926 return ThreadService::is_thread_cpu_time_enabled();
927 case JMM_THREAD_ALLOCATED_MEMORY:
928 return ThreadService::is_thread_allocated_memory_enabled();
929 default:
930 assert(0, "Unrecognized attribute");
931 return false;
932 }
933 JVM_END
934
935 // Sets the given boolean attribute and returns the previous value.
936 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
937 switch (att) {
938 case JMM_VERBOSE_GC:
939 return MemoryService::set_verbose(flag != 0);
940 case JMM_VERBOSE_CLASS:
941 return ClassLoadingService::set_verbose(flag != 0);
942 case JMM_THREAD_CONTENTION_MONITORING:
943 return ThreadService::set_thread_monitoring_contention(flag != 0);
944 case JMM_THREAD_CPU_TIME:
945 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
946 case JMM_THREAD_ALLOCATED_MEMORY:
947 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
948 default:
949 assert(0, "Unrecognized attribute");
950 return false;
951 }
952 JVM_END
953
954
955 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
956 switch (att) {
957 case JMM_GC_TIME_MS:
958 return mgr->gc_time_ms();
959
960 case JMM_GC_COUNT:
961 return mgr->gc_count();
962
963 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
964 // current implementation only has 1 ext attribute
965 return 1;
966
967 default:
968 assert(0, "Unrecognized GC attribute");
969 return -1;
970 }
971 }
972
973 class VmThreadCountClosure: public ThreadClosure {
974 private:
975 int _count;
976 public:
977 VmThreadCountClosure() : _count(0) {};
978 void do_thread(Thread* thread);
979 int count() { return _count; }
980 };
981
982 void VmThreadCountClosure::do_thread(Thread* thread) {
983 // exclude externally visible JavaThreads
984 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
985 return;
986 }
987
988 _count++;
989 }
990
991 static jint get_vm_thread_count() {
992 VmThreadCountClosure vmtcc;
993 {
994 MutexLockerEx ml(Threads_lock);
995 Threads::threads_do(&vmtcc);
996 }
997
998 return vmtcc.count();
999 }
1000
1001 static jint get_num_flags() {
1002 // last flag entry is always NULL, so subtract 1
1003 int nFlags = (int) Flag::numFlags - 1;
1004 int count = 0;
1005 for (int i = 0; i < nFlags; i++) {
1006 Flag* flag = &Flag::flags[i];
1007 // Exclude the locked (diagnostic, experimental) flags
1008 if (flag->is_unlocked() || flag->is_unlocker()) {
1009 count++;
1010 }
1011 }
1012 return count;
1013 }
1014
1015 static jlong get_long_attribute(jmmLongAttribute att) {
1016 switch (att) {
1017 case JMM_CLASS_LOADED_COUNT:
1018 return ClassLoadingService::loaded_class_count();
1019
1020 case JMM_CLASS_UNLOADED_COUNT:
1021 return ClassLoadingService::unloaded_class_count();
1022
1023 case JMM_THREAD_TOTAL_COUNT:
1024 return ThreadService::get_total_thread_count();
1025
1026 case JMM_THREAD_LIVE_COUNT:
1027 return ThreadService::get_live_thread_count();
1028
1029 case JMM_THREAD_PEAK_COUNT:
1030 return ThreadService::get_peak_thread_count();
1031
1032 case JMM_THREAD_DAEMON_COUNT:
1033 return ThreadService::get_daemon_thread_count();
1034
1035 case JMM_JVM_INIT_DONE_TIME_MS:
1036 return Management::vm_init_done_time();
1037
1038 case JMM_JVM_UPTIME_MS:
1039 return Management::ticks_to_ms(os::elapsed_counter());
1040
1041 case JMM_COMPILE_TOTAL_TIME_MS:
1042 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
1043
1044 case JMM_OS_PROCESS_ID:
1045 return os::current_process_id();
1046
1047 // Hotspot-specific counters
1048 case JMM_CLASS_LOADED_BYTES:
1049 return ClassLoadingService::loaded_class_bytes();
1050
1051 case JMM_CLASS_UNLOADED_BYTES:
1052 return ClassLoadingService::unloaded_class_bytes();
1053
1054 case JMM_SHARED_CLASS_LOADED_COUNT:
1055 return ClassLoadingService::loaded_shared_class_count();
1056
1057 case JMM_SHARED_CLASS_UNLOADED_COUNT:
1058 return ClassLoadingService::unloaded_shared_class_count();
1059
1060
1061 case JMM_SHARED_CLASS_LOADED_BYTES:
1062 return ClassLoadingService::loaded_shared_class_bytes();
1063
1064 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1065 return ClassLoadingService::unloaded_shared_class_bytes();
1066
1067 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1068 return ClassLoader::classloader_time_ms();
1069
1070 case JMM_VM_GLOBAL_COUNT:
1071 return get_num_flags();
1072
1073 case JMM_SAFEPOINT_COUNT:
1074 return RuntimeService::safepoint_count();
1075
1076 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1077 return RuntimeService::safepoint_sync_time_ms();
1078
1079 case JMM_TOTAL_STOPPED_TIME_MS:
1080 return RuntimeService::safepoint_time_ms();
1081
1082 case JMM_TOTAL_APP_TIME_MS:
1083 return RuntimeService::application_time_ms();
1084
1085 case JMM_VM_THREAD_COUNT:
1086 return get_vm_thread_count();
1087
1088 case JMM_CLASS_INIT_TOTAL_COUNT:
1089 return ClassLoader::class_init_count();
1090
1091 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1092 return ClassLoader::class_init_time_ms();
1093
1094 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1095 return ClassLoader::class_verify_time_ms();
1096
1097 case JMM_METHOD_DATA_SIZE_BYTES:
1098 return ClassLoadingService::class_method_data_size();
1099
1100 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1101 return os::physical_memory();
1102
1103 default:
1104 return -1;
1105 }
1106 }
1107
1108
1109 // Returns the long value of a given attribute.
1110 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
1111 if (obj == NULL) {
1112 return get_long_attribute(att);
1113 } else {
1114 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
1115 if (mgr != NULL) {
1116 return get_gc_attribute(mgr, att);
1117 }
1118 }
1119 return -1;
1120 JVM_END
1121
1122 // Gets the value of all attributes specified in the given array
1123 // and sets the value in the result array.
1124 // Returns the number of attributes found.
1125 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1126 jobject obj,
1127 jmmLongAttribute* atts,
1128 jint count,
1129 jlong* result))
1130
1131 int num_atts = 0;
1132 if (obj == NULL) {
1133 for (int i = 0; i < count; i++) {
1134 result[i] = get_long_attribute(atts[i]);
1135 if (result[i] != -1) {
1136 num_atts++;
1137 }
1138 }
1139 } else {
1140 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1141 for (int i = 0; i < count; i++) {
1142 result[i] = get_gc_attribute(mgr, atts[i]);
1143 if (result[i] != -1) {
1144 num_atts++;
1145 }
1146 }
1147 }
1148 return num_atts;
1149 JVM_END
1150
1151 // Helper function to do thread dump for a specific list of threads
1152 static void do_thread_dump(ThreadDumpResult* dump_result,
1153 typeArrayHandle ids_ah, // array of thread ID (long[])
1154 int num_threads,
1155 int max_depth,
1156 bool with_locked_monitors,
1157 bool with_locked_synchronizers,
1158 TRAPS) {
1159
1160 // First get an array of threadObj handles.
1161 // A JavaThread may terminate before we get the stack trace.
1162 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1163 {
1164 MutexLockerEx ml(Threads_lock);
1165 for (int i = 0; i < num_threads; i++) {
1166 jlong tid = ids_ah->long_at(i);
1167 JavaThread* jt = find_java_thread_from_id(tid);
1168 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
1169 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1170 thread_handle_array->append(threadObj_h);
1171 }
1172 }
1173
1174 // Obtain thread dumps and thread snapshot information
1175 VM_ThreadDump op(dump_result,
1176 thread_handle_array,
1177 num_threads,
1178 max_depth, /* stack depth */
1179 with_locked_monitors,
1180 with_locked_synchronizers);
1181 VMThread::execute(&op);
1182 }
1183
1184 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1185 // for the thread ID specified in the corresponding entry in
1186 // the given array of thread IDs; or NULL if the thread does not exist
1187 // or has terminated.
1188 //
1189 // Input parameters:
1190 // ids - array of thread IDs
1191 // maxDepth - the maximum depth of stack traces to be dumped:
1192 // maxDepth == -1 requests to dump entire stack trace.
1193 // maxDepth == 0 requests no stack trace.
1194 // infoArray - array of ThreadInfo objects
1195 //
1196 // QQQ - Why does this method return a value instead of void?
1197 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1198 // Check if threads is null
1199 if (ids == NULL || infoArray == NULL) {
1200 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1201 }
1202
1203 if (maxDepth < -1) {
1204 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1205 "Invalid maxDepth", -1);
1206 }
1207
1208 ResourceMark rm(THREAD);
1209 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1210 typeArrayHandle ids_ah(THREAD, ta);
1211
1212 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1213 objArrayOop oa = objArrayOop(infoArray_obj);
1214 objArrayHandle infoArray_h(THREAD, oa);
1215
1216 // validate the thread id array
1217 validate_thread_id_array(ids_ah, CHECK_0);
1218
1219 // validate the ThreadInfo[] parameters
1220 validate_thread_info_array(infoArray_h, CHECK_0);
1221
1222 // infoArray must be of the same length as the given array of thread IDs
1223 int num_threads = ids_ah->length();
1224 if (num_threads != infoArray_h->length()) {
1225 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1226 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1227 }
1228
1229 if (JDK_Version::is_gte_jdk16x_version()) {
1230 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1231 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1232 }
1233
1234 // Must use ThreadDumpResult to store the ThreadSnapshot.
1235 // GC may occur after the thread snapshots are taken but before
1236 // this function returns. The threadObj and other oops kept
1237 // in the ThreadSnapshot are marked and adjusted during GC.
1238 ThreadDumpResult dump_result(num_threads);
1239
1240 if (maxDepth == 0) {
1241 // no stack trace dumped - do not need to stop the world
1242 {
1243 MutexLockerEx ml(Threads_lock);
1244 for (int i = 0; i < num_threads; i++) {
1245 jlong tid = ids_ah->long_at(i);
1246 JavaThread* jt = find_java_thread_from_id(tid);
1247 ThreadSnapshot* ts;
1248 if (jt == NULL) {
1249 // if the thread does not exist or now it is terminated,
1250 // create dummy snapshot
1251 ts = new ThreadSnapshot();
1252 } else {
1253 ts = new ThreadSnapshot(jt);
1254 }
1255 dump_result.add_thread_snapshot(ts);
1256 }
1257 }
1258 } else {
1259 // obtain thread dump with the specific list of threads with stack trace
1260 do_thread_dump(&dump_result,
1261 ids_ah,
1262 num_threads,
1263 maxDepth,
1264 false, /* no locked monitor */
1265 false, /* no locked synchronizers */
1266 CHECK_0);
1267 }
1268
1269 int num_snapshots = dump_result.num_snapshots();
1270 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1271 int index = 0;
1272 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1273 // For each thread, create an java/lang/management/ThreadInfo object
1274 // and fill with the thread information
1275
1276 if (ts->threadObj() == NULL) {
1277 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1278 infoArray_h->obj_at_put(index, NULL);
1279 continue;
1280 }
1281
1282 // Create java.lang.management.ThreadInfo object
1283 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1284 infoArray_h->obj_at_put(index, info_obj);
1285 }
1286 return 0;
1287 JVM_END
1288
1289 // Dump thread info for the specified threads.
1290 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1291 // for the thread ID specified in the corresponding entry in
1292 // the given array of thread IDs; or NULL if the thread does not exist
1293 // or has terminated.
1294 //
1295 // Input parameter:
1296 // ids - array of thread IDs; NULL indicates all live threads
1297 // locked_monitors - if true, dump locked object monitors
1298 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1299 //
1300 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1301 ResourceMark rm(THREAD);
1302
1303 if (JDK_Version::is_gte_jdk16x_version()) {
1304 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1305 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1306 }
1307
1308 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1309 int num_threads = (ta != NULL ? ta->length() : 0);
1310 typeArrayHandle ids_ah(THREAD, ta);
1311
1312 ThreadDumpResult dump_result(num_threads); // can safepoint
1313
1314 if (ids_ah() != NULL) {
1315
1316 // validate the thread id array
1317 validate_thread_id_array(ids_ah, CHECK_NULL);
1318
1319 // obtain thread dump of a specific list of threads
1320 do_thread_dump(&dump_result,
1321 ids_ah,
1322 num_threads,
1323 -1, /* entire stack */
1324 (locked_monitors ? true : false), /* with locked monitors */
1325 (locked_synchronizers ? true : false), /* with locked synchronizers */
1326 CHECK_NULL);
1327 } else {
1328 // obtain thread dump of all threads
1329 VM_ThreadDump op(&dump_result,
1330 -1, /* entire stack */
1331 (locked_monitors ? true : false), /* with locked monitors */
1332 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1333 VMThread::execute(&op);
1334 }
1335
1336 int num_snapshots = dump_result.num_snapshots();
1337
1338 // create the result ThreadInfo[] object
1339 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1340 instanceKlassHandle ik (THREAD, k);
1341 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1342 objArrayHandle result_h(THREAD, r);
1343
1344 int index = 0;
1345 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1346 if (ts->threadObj() == NULL) {
1347 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1348 result_h->obj_at_put(index, NULL);
1349 continue;
1350 }
1351
1352 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1353 assert(stacktrace != NULL, "Must have a stack trace dumped");
1354
1355 // Create Object[] filled with locked monitors
1356 // Create int[] filled with the stack depth where a monitor was locked
1357 int num_frames = stacktrace->get_stack_depth();
1358 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1359
1360 // Count the total number of locked monitors
1361 for (int i = 0; i < num_frames; i++) {
1362 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1363 num_locked_monitors += frame->num_locked_monitors();
1364 }
1365
1366 objArrayHandle monitors_array;
1367 typeArrayHandle depths_array;
1368 objArrayHandle synchronizers_array;
1369
1370 if (locked_monitors) {
1371 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1372 // where the thread locked it
1373 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1374 objArrayHandle mh(THREAD, array);
1375 monitors_array = mh;
1376
1377 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1378 typeArrayHandle dh(THREAD, tarray);
1379 depths_array = dh;
1380
1381 int count = 0;
1382 int j = 0;
1383 for (int depth = 0; depth < num_frames; depth++) {
1384 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1385 int len = frame->num_locked_monitors();
1386 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1387 for (j = 0; j < len; j++) {
1388 oop monitor = locked_monitors->at(j);
1389 assert(monitor != NULL && monitor->is_instance(), "must be a Java object");
1390 monitors_array->obj_at_put(count, monitor);
1391 depths_array->int_at_put(count, depth);
1392 count++;
1393 }
1394 }
1395
1396 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1397 for (j = 0; j < jni_locked_monitors->length(); j++) {
1398 oop object = jni_locked_monitors->at(j);
1399 assert(object != NULL && object->is_instance(), "must be a Java object");
1400 monitors_array->obj_at_put(count, object);
1401 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1402 depths_array->int_at_put(count, -1);
1403 count++;
1404 }
1405 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1406 }
1407
1408 if (locked_synchronizers) {
1409 // Create Object[] filled with locked JSR-166 synchronizers
1410 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1411 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1412 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1413 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1414
1415 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1416 objArrayHandle sh(THREAD, array);
1417 synchronizers_array = sh;
1418
1419 for (int k = 0; k < num_locked_synchronizers; k++) {
1420 synchronizers_array->obj_at_put(k, locks->at(k));
1421 }
1422 }
1423
1424 // Create java.lang.management.ThreadInfo object
1425 instanceOop info_obj = Management::create_thread_info_instance(ts,
1426 monitors_array,
1427 depths_array,
1428 synchronizers_array,
1429 CHECK_NULL);
1430 result_h->obj_at_put(index, info_obj);
1431 }
1432
1433 return (jobjectArray) JNIHandles::make_local(env, result_h());
1434 JVM_END
1435
1436 // Returns an array of Class objects.
1437 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1438 ResourceMark rm(THREAD);
1439
1440 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1441
1442 int num_classes = lce.num_loaded_classes();
1443 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1444 objArrayHandle classes_ah(THREAD, r);
1445
1446 for (int i = 0; i < num_classes; i++) {
1447 KlassHandle kh = lce.get_klass(i);
1448 oop mirror = kh()->java_mirror();
1449 classes_ah->obj_at_put(i, mirror);
1450 }
1451
1452 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1453 JVM_END
1454
1455 // Reset statistic. Return true if the requested statistic is reset.
1456 // Otherwise, return false.
1457 //
1458 // Input parameters:
1459 // obj - specify which instance the statistic associated with to be reset
1460 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1461 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1462 // type - the type of statistic to be reset
1463 //
1464 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1465 ResourceMark rm(THREAD);
1466
1467 switch (type) {
1468 case JMM_STAT_PEAK_THREAD_COUNT:
1469 ThreadService::reset_peak_thread_count();
1470 return true;
1471
1472 case JMM_STAT_THREAD_CONTENTION_COUNT:
1473 case JMM_STAT_THREAD_CONTENTION_TIME: {
1474 jlong tid = obj.j;
1475 if (tid < 0) {
1476 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1477 }
1478
1479 // Look for the JavaThread of this given tid
1480 MutexLockerEx ml(Threads_lock);
1481 if (tid == 0) {
1482 // reset contention statistics for all threads if tid == 0
1483 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1484 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1485 ThreadService::reset_contention_count_stat(java_thread);
1486 } else {
1487 ThreadService::reset_contention_time_stat(java_thread);
1488 }
1489 }
1490 } else {
1491 // reset contention statistics for a given thread
1492 JavaThread* java_thread = find_java_thread_from_id(tid);
1493 if (java_thread == NULL) {
1494 return false;
1495 }
1496
1497 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1498 ThreadService::reset_contention_count_stat(java_thread);
1499 } else {
1500 ThreadService::reset_contention_time_stat(java_thread);
1501 }
1502 }
1503 return true;
1504 break;
1505 }
1506 case JMM_STAT_PEAK_POOL_USAGE: {
1507 jobject o = obj.l;
1508 if (o == NULL) {
1509 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1510 }
1511
1512 oop pool_obj = JNIHandles::resolve(o);
1513 assert(pool_obj->is_instance(), "Should be an instanceOop");
1514 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1515
1516 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1517 if (pool != NULL) {
1518 pool->reset_peak_memory_usage();
1519 return true;
1520 }
1521 break;
1522 }
1523 case JMM_STAT_GC_STAT: {
1524 jobject o = obj.l;
1525 if (o == NULL) {
1526 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1527 }
1528
1529 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1530 if (mgr != NULL) {
1531 mgr->reset_gc_stat();
1532 return true;
1533 }
1534 break;
1535 }
1536 default:
1537 assert(0, "Unknown Statistic Type");
1538 }
1539 return false;
1540 JVM_END
1541
1542 // Returns the fast estimate of CPU time consumed by
1543 // a given thread (in nanoseconds).
1544 // If thread_id == 0, return CPU time for the current thread.
1545 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1546 if (!os::is_thread_cpu_time_supported()) {
1547 return -1;
1548 }
1549
1550 if (thread_id < 0) {
1551 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1552 "Invalid thread ID", -1);
1553 }
1554
1555 JavaThread* java_thread = NULL;
1556 if (thread_id == 0) {
1557 // current thread
1558 return os::current_thread_cpu_time();
1559 } else {
1560 MutexLockerEx ml(Threads_lock);
1561 java_thread = find_java_thread_from_id(thread_id);
1562 if (java_thread != NULL) {
1563 return os::thread_cpu_time((Thread*) java_thread);
1564 }
1565 }
1566 return -1;
1567 JVM_END
1568
1569 // Returns the CPU time consumed by a given thread (in nanoseconds).
1570 // If thread_id == 0, CPU time for the current thread is returned.
1571 // If user_sys_cpu_time = true, user level and system CPU time of
1572 // a given thread is returned; otherwise, only user level CPU time
1573 // is returned.
1574 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
1575 if (!os::is_thread_cpu_time_supported()) {
1576 return -1;
1577 }
1578
1579 if (thread_id < 0) {
1580 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1581 "Invalid thread ID", -1);
1582 }
1583
1584 JavaThread* java_thread = NULL;
1585 if (thread_id == 0) {
1586 // current thread
1587 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
1588 } else {
1589 MutexLockerEx ml(Threads_lock);
1590 java_thread = find_java_thread_from_id(thread_id);
1591 if (java_thread != NULL) {
1592 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
1593 }
1594 }
1595 return -1;
1596 JVM_END
1597
1598 // Gets an array containing the CPU times consumed by a set of threads
1599 // (in nanoseconds). Each element of the array is the CPU time for the
1600 // thread ID specified in the corresponding entry in the given array
1601 // of thread IDs; or -1 if the thread does not exist or has terminated.
1602 // If user_sys_cpu_time = true, the sum of user level and system CPU time
1603 // for the given thread is returned; otherwise, only user level CPU time
1604 // is returned.
1605 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
1606 jlongArray timeArray,
1607 jboolean user_sys_cpu_time))
1608 // Check if threads is null
1609 if (ids == NULL || timeArray == NULL) {
1610 THROW(vmSymbols::java_lang_NullPointerException());
1611 }
1612
1613 ResourceMark rm(THREAD);
1614 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1615 typeArrayHandle ids_ah(THREAD, ta);
1616
1617 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
1618 typeArrayHandle timeArray_h(THREAD, tia);
1619
1620 // validate the thread id array
1621 validate_thread_id_array(ids_ah, CHECK);
1622
1623 // timeArray must be of the same length as the given array of thread IDs
1624 int num_threads = ids_ah->length();
1625 if (num_threads != timeArray_h->length()) {
1626 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1627 "The length of the given long array does not match the length of "
1628 "the given array of thread IDs");
1629 }
1630
1631 MutexLockerEx ml(Threads_lock);
1632 for (int i = 0; i < num_threads; i++) {
1633 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i));
1634 if (java_thread != NULL) {
1635 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
1636 user_sys_cpu_time != 0));
1637 }
1638 }
1639 JVM_END
1640
1641 // Returns a String array of all VM global flag names
1642 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1643 // last flag entry is always NULL, so subtract 1
1644 int nFlags = (int) Flag::numFlags - 1;
1645 // allocate a temp array
1646 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1647 nFlags, CHECK_0);
1648 objArrayHandle flags_ah(THREAD, r);
1649 int num_entries = 0;
1650 for (int i = 0; i < nFlags; i++) {
1651 Flag* flag = &Flag::flags[i];
1652 // Exclude notproduct and develop flags in product builds.
1653 if (flag->is_constant_in_binary()) {
1654 continue;
1655 }
1656 // Exclude the locked (experimental, diagnostic) flags
1657 if (flag->is_unlocked() || flag->is_unlocker()) {
1658 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0);
1659 flags_ah->obj_at_put(num_entries, s());
1660 num_entries++;
1661 }
1662 }
1663
1664 if (num_entries < nFlags) {
1665 // Return array of right length
1666 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1667 for(int i = 0; i < num_entries; i++) {
1668 res->obj_at_put(i, flags_ah->obj_at(i));
1669 }
1670 return (jobjectArray)JNIHandles::make_local(env, res);
1671 }
1672
1673 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1674 JVM_END
1675
1676 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1677 // can't be determined, true otherwise. If false is returned, then *global
1678 // will be incomplete and invalid.
1679 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1680 Handle flag_name;
1681 if (name() == NULL) {
1682 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false);
1683 } else {
1684 flag_name = name;
1685 }
1686 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1687
1688 if (flag->is_bool()) {
1689 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1690 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1691 } else if (flag->is_intx()) {
1692 global->value.j = (jlong)flag->get_intx();
1693 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1694 } else if (flag->is_uintx()) {
1695 global->value.j = (jlong)flag->get_uintx();
1696 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1697 } else if (flag->is_uint64_t()) {
1698 global->value.j = (jlong)flag->get_uint64_t();
1699 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1700 } else if (flag->is_ccstr()) {
1701 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1702 global->value.l = (jobject)JNIHandles::make_local(env, str());
1703 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1704 } else {
1705 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1706 return false;
1707 }
1708
1709 global->writeable = flag->is_writeable();
1710 global->external = flag->is_external();
1711 switch (flag->get_origin()) {
1712 case Flag::DEFAULT:
1713 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1714 break;
1715 case Flag::COMMAND_LINE:
1716 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1717 break;
1718 case Flag::ENVIRON_VAR:
1719 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1720 break;
1721 case Flag::CONFIG_FILE:
1722 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1723 break;
1724 case Flag::MANAGEMENT:
1725 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1726 break;
1727 case Flag::ERGONOMIC:
1728 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1729 break;
1730 default:
1731 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1732 }
1733
1734 return true;
1735 }
1736
1737 // Fill globals array of count length with jmmVMGlobal entries
1738 // specified by names. If names == NULL, fill globals array
1739 // with all Flags. Return value is number of entries
1740 // created in globals.
1741 // If a Flag with a given name in an array element does not
1742 // exist, globals[i].name will be set to NULL.
1743 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1744 jobjectArray names,
1745 jmmVMGlobal *globals,
1746 jint count))
1747
1748
1749 if (globals == NULL) {
1750 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1751 }
1752
1753 ResourceMark rm(THREAD);
1754
1755 if (names != NULL) {
1756 // return the requested globals
1757 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1758 objArrayHandle names_ah(THREAD, ta);
1759 // Make sure we have a String array
1760 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1761 if (element_klass != SystemDictionary::String_klass()) {
1762 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1763 "Array element type is not String class", 0);
1764 }
1765
1766 int names_length = names_ah->length();
1767 int num_entries = 0;
1768 for (int i = 0; i < names_length && i < count; i++) {
1769 oop s = names_ah->obj_at(i);
1770 if (s == NULL) {
1771 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1772 }
1773
1774 Handle sh(THREAD, s);
1775 char* str = java_lang_String::as_utf8_string(s);
1776 Flag* flag = Flag::find_flag(str, strlen(str));
1777 if (flag != NULL &&
1778 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1779 num_entries++;
1780 } else {
1781 globals[i].name = NULL;
1782 }
1783 }
1784 return num_entries;
1785 } else {
1786 // return all globals if names == NULL
1787
1788 // last flag entry is always NULL, so subtract 1
1789 int nFlags = (int) Flag::numFlags - 1;
1790 Handle null_h;
1791 int num_entries = 0;
1792 for (int i = 0; i < nFlags && num_entries < count; i++) {
1793 Flag* flag = &Flag::flags[i];
1794 // Exclude notproduct and develop flags in product builds.
1795 if (flag->is_constant_in_binary()) {
1796 continue;
1797 }
1798 // Exclude the locked (diagnostic, experimental) flags
1799 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1800 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1801 num_entries++;
1802 }
1803 }
1804 return num_entries;
1805 }
1806 JVM_END
1807
1808 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1809 ResourceMark rm(THREAD);
1810
1811 oop fn = JNIHandles::resolve_external_guard(flag_name);
1812 if (fn == NULL) {
1813 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1814 "The flag name cannot be null.");
1815 }
1816 char* name = java_lang_String::as_utf8_string(fn);
1817 Flag* flag = Flag::find_flag(name, strlen(name));
1818 if (flag == NULL) {
1819 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1820 "Flag does not exist.");
1821 }
1822 if (!flag->is_writeable()) {
1823 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1824 "This flag is not writeable.");
1825 }
1826
1827 bool succeed = false;
1828 if (flag->is_bool()) {
1829 bool bvalue = (new_value.z == JNI_TRUE ? true : false);
1830 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT);
1831 } else if (flag->is_intx()) {
1832 intx ivalue = (intx)new_value.j;
1833 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT);
1834 } else if (flag->is_uintx()) {
1835 uintx uvalue = (uintx)new_value.j;
1836
1837 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) {
1838 FormatBuffer<80> err_msg("%s", "");
1839 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) {
1840 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1841 }
1842 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) {
1843 FormatBuffer<80> err_msg("%s", "");
1844 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) {
1845 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1846 }
1847 }
1848 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT);
1849 } else if (flag->is_uint64_t()) {
1850 uint64_t uvalue = (uint64_t)new_value.j;
1851 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT);
1852 } else if (flag->is_ccstr()) {
1853 oop str = JNIHandles::resolve_external_guard(new_value.l);
1854 if (str == NULL) {
1855 THROW(vmSymbols::java_lang_NullPointerException());
1856 }
1857 ccstr svalue = java_lang_String::as_utf8_string(str);
1858 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT);
1859 if (succeed) {
1860 FREE_C_HEAP_ARRAY(char, svalue, mtInternal);
1861 }
1862 }
1863 assert(succeed, "Setting flag should succeed");
1864 JVM_END
1865
1866 class ThreadTimesClosure: public ThreadClosure {
1867 private:
1868 objArrayHandle _names_strings;
1869 char **_names_chars;
1870 typeArrayHandle _times;
1871 int _names_len;
1872 int _times_len;
1873 int _count;
1874
1875 public:
1876 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1877 ~ThreadTimesClosure();
1878 virtual void do_thread(Thread* thread);
1879 void do_unlocked();
1880 int count() { return _count; }
1881 };
1882
1883 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1884 typeArrayHandle times) {
1885 assert(names() != NULL, "names was NULL");
1886 assert(times() != NULL, "times was NULL");
1887 _names_strings = names;
1888 _names_len = names->length();
1889 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1890 _times = times;
1891 _times_len = times->length();
1892 _count = 0;
1893 }
1894
1895 //
1896 // Called with Threads_lock held
1897 //
1898 void ThreadTimesClosure::do_thread(Thread* thread) {
1899 assert(thread != NULL, "thread was NULL");
1900
1901 // exclude externally visible JavaThreads
1902 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1903 return;
1904 }
1905
1906 if (_count >= _names_len || _count >= _times_len) {
1907 // skip if the result array is not big enough
1908 return;
1909 }
1910
1911 EXCEPTION_MARK;
1912 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1913
1914 assert(thread->name() != NULL, "All threads should have a name");
1915 _names_chars[_count] = strdup(thread->name());
1916 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1917 os::thread_cpu_time(thread) : -1);
1918 _count++;
1919 }
1920
1921 // Called without Threads_lock, we can allocate String objects.
1922 void ThreadTimesClosure::do_unlocked() {
1923
1924 EXCEPTION_MARK;
1925 for (int i = 0; i < _count; i++) {
1926 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1927 _names_strings->obj_at_put(i, s());
1928 }
1929 }
1930
1931 ThreadTimesClosure::~ThreadTimesClosure() {
1932 for (int i = 0; i < _count; i++) {
1933 free(_names_chars[i]);
1934 }
1935 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal);
1936 }
1937
1938 // Fills names with VM internal thread names and times with the corresponding
1939 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1940 // If the element type of names is not String, an IllegalArgumentException is
1941 // thrown.
1942 // If an array is not large enough to hold all the entries, only the entries
1943 // that fit will be returned. Return value is the number of VM internal
1944 // threads entries.
1945 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1946 jobjectArray names,
1947 jlongArray times))
1948 if (names == NULL || times == NULL) {
1949 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1950 }
1951 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1952 objArrayHandle names_ah(THREAD, na);
1953
1954 // Make sure we have a String array
1955 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1956 if (element_klass != SystemDictionary::String_klass()) {
1957 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1958 "Array element type is not String class", 0);
1959 }
1960
1961 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1962 typeArrayHandle times_ah(THREAD, ta);
1963
1964 ThreadTimesClosure ttc(names_ah, times_ah);
1965 {
1966 MutexLockerEx ml(Threads_lock);
1967 Threads::threads_do(&ttc);
1968 }
1969 ttc.do_unlocked();
1970 return ttc.count();
1971 JVM_END
1972
1973 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1974 ResourceMark rm(THREAD);
1975
1976 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1977 VMThread::execute(&op);
1978
1979 DeadlockCycle* deadlocks = op.result();
1980 if (deadlocks == NULL) {
1981 // no deadlock found and return
1982 return Handle();
1983 }
1984
1985 int num_threads = 0;
1986 DeadlockCycle* cycle;
1987 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1988 num_threads += cycle->num_threads();
1989 }
1990
1991 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1992 objArrayHandle threads_ah(THREAD, r);
1993
1994 int index = 0;
1995 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1996 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1997 int len = deadlock_threads->length();
1998 for (int i = 0; i < len; i++) {
1999 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
2000 index++;
2001 }
2002 }
2003 return threads_ah;
2004 }
2005
2006 // Finds cycles of threads that are deadlocked involved in object monitors
2007 // and JSR-166 synchronizers.
2008 // Returns an array of Thread objects which are in deadlock, if any.
2009 // Otherwise, returns NULL.
2010 //
2011 // Input parameter:
2012 // object_monitors_only - if true, only check object monitors
2013 //
2014 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
2015 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
2016 return (jobjectArray) JNIHandles::make_local(env, result());
2017 JVM_END
2018
2019 // Finds cycles of threads that are deadlocked on monitor locks
2020 // Returns an array of Thread objects which are in deadlock, if any.
2021 // Otherwise, returns NULL.
2022 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
2023 Handle result = find_deadlocks(true, CHECK_0);
2024 return (jobjectArray) JNIHandles::make_local(env, result());
2025 JVM_END
2026
2027 // Gets the information about GC extension attributes including
2028 // the name of the attribute, its type, and a short description.
2029 //
2030 // Input parameters:
2031 // mgr - GC memory manager
2032 // info - caller allocated array of jmmExtAttributeInfo
2033 // count - number of elements of the info array
2034 //
2035 // Returns the number of GC extension attributes filled in the info array; or
2036 // -1 if info is not big enough
2037 //
2038 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
2039 // All GC memory managers have 1 attribute (number of GC threads)
2040 if (count == 0) {
2041 return 0;
2042 }
2043
2044 if (info == NULL) {
2045 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
2046 }
2047
2048 info[0].name = "GcThreadCount";
2049 info[0].type = 'I';
2050 info[0].description = "Number of GC threads";
2051 return 1;
2052 JVM_END
2053
2054 // verify the given array is an array of java/lang/management/MemoryUsage objects
2055 // of a given length and return the objArrayOop
2056 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
2057 if (array == NULL) {
2058 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
2059 }
2060
2061 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
2062 objArrayHandle array_h(THREAD, oa);
2063
2064 // array must be of the given length
2065 if (length != array_h->length()) {
2066 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2067 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
2068 }
2069
2070 // check if the element of array is of type MemoryUsage class
2071 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
2072 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
2073 if (element_klass != usage_klass) {
2074 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2075 "The element type is not MemoryUsage class", 0);
2076 }
2077
2078 return array_h();
2079 }
2080
2081 // Gets the statistics of the last GC of a given GC memory manager.
2082 // Input parameters:
2083 // obj - GarbageCollectorMXBean object
2084 // gc_stat - caller allocated jmmGCStat where:
2085 // a. before_gc_usage - array of MemoryUsage objects
2086 // b. after_gc_usage - array of MemoryUsage objects
2087 // c. gc_ext_attributes_values_size is set to the
2088 // gc_ext_attribute_values array allocated
2089 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
2090 //
2091 // On return,
2092 // gc_index == 0 indicates no GC statistics available
2093 //
2094 // before_gc_usage and after_gc_usage - filled with per memory pool
2095 // before and after GC usage in the same order as the memory pools
2096 // returned by GetMemoryPools for a given GC memory manager.
2097 // num_gc_ext_attributes indicates the number of elements in
2098 // the gc_ext_attribute_values array is filled; or
2099 // -1 if the gc_ext_attributes_values array is not big enough
2100 //
2101 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
2102 ResourceMark rm(THREAD);
2103
2104 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
2105 THROW(vmSymbols::java_lang_NullPointerException());
2106 }
2107
2108 // Get the GCMemoryManager
2109 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2110
2111 // Make a copy of the last GC statistics
2112 // GC may occur while constructing the last GC information
2113 int num_pools = MemoryService::num_memory_pools();
2114 GCStatInfo stat(num_pools);
2115 if (mgr->get_last_gc_stat(&stat) == 0) {
2116 gc_stat->gc_index = 0;
2117 return;
2118 }
2119
2120 gc_stat->gc_index = stat.gc_index();
2121 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
2122 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
2123
2124 // Current implementation does not have GC extension attributes
2125 gc_stat->num_gc_ext_attributes = 0;
2126
2127 // Fill the arrays of MemoryUsage objects with before and after GC
2128 // per pool memory usage
2129 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
2130 num_pools,
2131 CHECK);
2132 objArrayHandle usage_before_gc_ah(THREAD, bu);
2133
2134 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
2135 num_pools,
2136 CHECK);
2137 objArrayHandle usage_after_gc_ah(THREAD, au);
2138
2139 for (int i = 0; i < num_pools; i++) {
2140 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
2141 Handle after_usage;
2142
2143 MemoryUsage u = stat.after_gc_usage_for_pool(i);
2144 if (u.max_size() == 0 && u.used() > 0) {
2145 // If max size == 0, this pool is a survivor space.
2146 // Set max size = -1 since the pools will be swapped after GC.
2147 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
2148 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
2149 } else {
2150 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
2151 }
2152 usage_before_gc_ah->obj_at_put(i, before_usage());
2153 usage_after_gc_ah->obj_at_put(i, after_usage());
2154 }
2155
2156 if (gc_stat->gc_ext_attribute_values_size > 0) {
2157 // Current implementation only has 1 attribute (number of GC threads)
2158 // The type is 'I'
2159 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2160 }
2161 JVM_END
2162
2163 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2164 ResourceMark rm(THREAD);
2165 // Get the GCMemoryManager
2166 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2167 mgr->set_notification_enabled(enabled?true:false);
2168 JVM_END
2169
2170 // Dump heap - Returns 0 if succeeds.
2171 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2172 #if INCLUDE_SERVICES
2173 ResourceMark rm(THREAD);
2174 oop on = JNIHandles::resolve_external_guard(outputfile);
2175 if (on == NULL) {
2176 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2177 "Output file name cannot be null.", -1);
2178 }
2179 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1));
2180 if (name == NULL) {
2181 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2182 "Output file name cannot be null.", -1);
2183 }
2184 HeapDumper dumper(live ? true : false);
2185 if (dumper.dump(name) != 0) {
2186 const char* errmsg = dumper.error_as_C_string();
2187 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2188 }
2189 return 0;
2190 #else // INCLUDE_SERVICES
2191 return -1;
2192 #endif // INCLUDE_SERVICES
2193 JVM_END
2194
2195 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2196 ResourceMark rm(THREAD);
2197 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2198 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2199 dcmd_list->length(), CHECK_NULL);
2200 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2201 for (int i = 0; i < dcmd_list->length(); i++) {
2202 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2203 cmd_array->obj_at_put(i, cmd_name);
2204 }
2205 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2206 JVM_END
2207
2208 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2209 dcmdInfo* infoArray))
2210 if (cmds == NULL || infoArray == NULL) {
2211 THROW(vmSymbols::java_lang_NullPointerException());
2212 }
2213
2214 ResourceMark rm(THREAD);
2215
2216 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2217 objArrayHandle cmds_ah(THREAD, ca);
2218
2219 // Make sure we have a String array
2220 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2221 if (element_klass != SystemDictionary::String_klass()) {
2222 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2223 "Array element type is not String class");
2224 }
2225
2226 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2227
2228 int num_cmds = cmds_ah->length();
2229 for (int i = 0; i < num_cmds; i++) {
2230 oop cmd = cmds_ah->obj_at(i);
2231 if (cmd == NULL) {
2232 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2233 "Command name cannot be null.");
2234 }
2235 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2236 if (cmd_name == NULL) {
2237 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2238 "Command name cannot be null.");
2239 }
2240 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2241 if (pos == -1) {
2242 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2243 "Unknown diagnostic command");
2244 }
2245 DCmdInfo* info = info_list->at(pos);
2246 infoArray[i].name = info->name();
2247 infoArray[i].description = info->description();
2248 infoArray[i].impact = info->impact();
2249 JavaPermission p = info->permission();
2250 infoArray[i].permission_class = p._class;
2251 infoArray[i].permission_name = p._name;
2252 infoArray[i].permission_action = p._action;
2253 infoArray[i].num_arguments = info->num_arguments();
2254 infoArray[i].enabled = info->is_enabled();
2255 }
2256 JVM_END
2257
2258 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2259 jstring command, dcmdArgInfo* infoArray))
2260 ResourceMark rm(THREAD);
2261 oop cmd = JNIHandles::resolve_external_guard(command);
2262 if (cmd == NULL) {
2263 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2264 "Command line cannot be null.");
2265 }
2266 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2267 if (cmd_name == NULL) {
2268 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2269 "Command line content cannot be null.");
2270 }
2271 DCmd* dcmd = NULL;
2272 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2273 strlen(cmd_name));
2274 if (factory != NULL) {
2275 dcmd = factory->create_resource_instance(NULL);
2276 }
2277 if (dcmd == NULL) {
2278 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2279 "Unknown diagnostic command");
2280 }
2281 DCmdMark mark(dcmd);
2282 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2283 if (array->length() == 0) {
2284 return;
2285 }
2286 for (int i = 0; i < array->length(); i++) {
2287 infoArray[i].name = array->at(i)->name();
2288 infoArray[i].description = array->at(i)->description();
2289 infoArray[i].type = array->at(i)->type();
2290 infoArray[i].default_string = array->at(i)->default_string();
2291 infoArray[i].mandatory = array->at(i)->is_mandatory();
2292 infoArray[i].option = array->at(i)->is_option();
2293 infoArray[i].multiple = array->at(i)->is_multiple();
2294 infoArray[i].position = array->at(i)->position();
2295 }
2296 return;
2297 JVM_END
2298
2299 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2300 ResourceMark rm(THREAD);
2301 oop cmd = JNIHandles::resolve_external_guard(commandline);
2302 if (cmd == NULL) {
2303 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2304 "Command line cannot be null.");
2305 }
2306 char* cmdline = java_lang_String::as_utf8_string(cmd);
2307 if (cmdline == NULL) {
2308 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2309 "Command line content cannot be null.");
2310 }
2311 bufferedStream output;
2312 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2313 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2314 return (jstring) JNIHandles::make_local(env, result);
2315 JVM_END
2316
2317 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2318 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2319 JVM_END
2320
2321 jlong Management::ticks_to_ms(jlong ticks) {
2322 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2323 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2324 * (double)1000.0);
2325 }
2326
2327 const struct jmmInterface_1_ jmm_interface = {
2328 NULL,
2329 NULL,
2330 jmm_GetVersion,
2331 jmm_GetOptionalSupport,
2332 jmm_GetInputArguments,
2333 jmm_GetThreadInfo,
2334 jmm_GetInputArgumentArray,
2335 jmm_GetMemoryPools,
2336 jmm_GetMemoryManagers,
2337 jmm_GetMemoryPoolUsage,
2338 jmm_GetPeakMemoryPoolUsage,
2339 jmm_GetThreadAllocatedMemory,
2340 jmm_GetMemoryUsage,
2341 jmm_GetLongAttribute,
2342 jmm_GetBoolAttribute,
2343 jmm_SetBoolAttribute,
2344 jmm_GetLongAttributes,
2345 jmm_FindMonitorDeadlockedThreads,
2346 jmm_GetThreadCpuTime,
2347 jmm_GetVMGlobalNames,
2348 jmm_GetVMGlobals,
2349 jmm_GetInternalThreadTimes,
2350 jmm_ResetStatistic,
2351 jmm_SetPoolSensor,
2352 jmm_SetPoolThreshold,
2353 jmm_GetPoolCollectionUsage,
2354 jmm_GetGCExtAttributeInfo,
2355 jmm_GetLastGCStat,
2356 jmm_GetThreadCpuTimeWithKind,
2357 jmm_GetThreadCpuTimesWithKind,
2358 jmm_DumpHeap0,
2359 jmm_FindDeadlockedThreads,
2360 jmm_SetVMGlobal,
2361 NULL,
2362 jmm_DumpThreads,
2363 jmm_SetGCNotificationEnabled,
2364 jmm_GetDiagnosticCommands,
2365 jmm_GetDiagnosticCommandInfo,
2366 jmm_GetDiagnosticCommandArgumentsInfo,
2367 jmm_ExecuteDiagnosticCommand,
2368 jmm_SetDiagnosticFrameworkNotificationEnabled
2369 };
2370 #endif // INCLUDE_MANAGEMENT
2371
2372 void* Management::get_jmm_interface(int version) {
2373 #if INCLUDE_MANAGEMENT
2374 if (version == JMM_VERSION_1_0) {
2375 return (void*) &jmm_interface;
2376 }
2377 #endif // INCLUDE_MANAGEMENT
2378 return NULL;
2379 }