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