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_null(vmSymbols::sun_management_Agent(),
159 loader,
160 Handle(),
161 THREAD);
162 if (k == NULL) {
163 vm_exit_during_initialization("Management agent initialization failure: "
164 "class sun.management.Agent not found.");
165 }
166 instanceKlassHandle ik (THREAD, k);
167
168 JavaValue result(T_VOID);
169 JavaCalls::call_static(&result,
170 ik,
171 vmSymbols::startAgent_name(),
172 vmSymbols::void_method_signature(),
173 CHECK);
174 }
175 }
176
177 void Management::get_optional_support(jmmOptionalSupport* support) {
178 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
179 }
180
181 Klass* Management::load_and_initialize_klass(Symbol* sh, TRAPS) {
182 Klass* k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL);
183 instanceKlassHandle ik (THREAD, k);
184 if (ik->should_be_initialized()) {
185 ik->initialize(CHECK_NULL);
186 }
187 // If these classes change to not be owned by the boot loader, they need
188 // to be walked to keep their class loader alive in oops_do.
189 assert(ik->class_loader() == NULL, "need to follow in oops_do");
190 return ik();
191 }
192
193 void Management::record_vm_startup_time(jlong begin, jlong duration) {
194 // if the performance counter is not initialized,
195 // then vm initialization failed; simply return.
196 if (_begin_vm_creation_time == NULL) return;
197
198 _begin_vm_creation_time->set_value(begin);
199 _end_vm_creation_time->set_value(begin + duration);
200 PerfMemory::set_accessible(true);
201 }
202
203 jlong Management::timestamp() {
204 TimeStamp t;
205 t.update();
206 return t.ticks() - _stamp.ticks();
207 }
208
209 void Management::oops_do(OopClosure* f) {
210 MemoryService::oops_do(f);
211 ThreadService::oops_do(f);
212 }
213
214 Klass* Management::java_lang_management_ThreadInfo_klass(TRAPS) {
215 if (_threadInfo_klass == NULL) {
216 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL);
217 }
218 return _threadInfo_klass;
219 }
220
221 Klass* Management::java_lang_management_MemoryUsage_klass(TRAPS) {
222 if (_memoryUsage_klass == NULL) {
223 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL);
224 }
225 return _memoryUsage_klass;
226 }
227
228 Klass* Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) {
229 if (_memoryPoolMXBean_klass == NULL) {
230 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL);
231 }
232 return _memoryPoolMXBean_klass;
233 }
234
235 Klass* Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) {
236 if (_memoryManagerMXBean_klass == NULL) {
237 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL);
238 }
239 return _memoryManagerMXBean_klass;
240 }
241
242 Klass* Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) {
243 if (_garbageCollectorMXBean_klass == NULL) {
244 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL);
245 }
246 return _garbageCollectorMXBean_klass;
247 }
248
249 Klass* Management::sun_management_Sensor_klass(TRAPS) {
250 if (_sensor_klass == NULL) {
251 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL);
252 }
253 return _sensor_klass;
254 }
255
256 Klass* Management::sun_management_ManagementFactory_klass(TRAPS) {
257 if (_managementFactory_klass == NULL) {
258 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL);
259 }
260 return _managementFactory_klass;
261 }
262
263 Klass* Management::sun_management_GarbageCollectorImpl_klass(TRAPS) {
264 if (_garbageCollectorImpl_klass == NULL) {
265 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL);
266 }
267 return _garbageCollectorImpl_klass;
268 }
269
270 Klass* Management::com_sun_management_GcInfo_klass(TRAPS) {
271 if (_gcInfo_klass == NULL) {
272 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL);
273 }
274 return _gcInfo_klass;
275 }
276
277 Klass* Management::sun_management_DiagnosticCommandImpl_klass(TRAPS) {
278 if (_diagnosticCommandImpl_klass == NULL) {
279 _diagnosticCommandImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_DiagnosticCommandImpl(), CHECK_NULL);
280 }
281 return _diagnosticCommandImpl_klass;
282 }
283
284 Klass* Management::sun_management_ManagementFactoryHelper_klass(TRAPS) {
285 if (_managementFactoryHelper_klass == NULL) {
286 _managementFactoryHelper_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactoryHelper(), CHECK_NULL);
287 }
288 return _managementFactoryHelper_klass;
289 }
290
291 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
292 Handle snapshot_thread(THREAD, snapshot->threadObj());
293
294 jlong contended_time;
295 jlong waited_time;
296 if (ThreadService::is_thread_monitoring_contention()) {
297 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks());
298 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks());
299 } else {
300 // set them to -1 if thread contention monitoring is disabled.
301 contended_time = max_julong;
302 waited_time = max_julong;
303 }
304
305 int thread_status = snapshot->thread_status();
306 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object");
307 if (snapshot->is_ext_suspended()) {
308 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED;
309 }
310 if (snapshot->is_in_native()) {
311 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE;
312 }
313
314 ThreadStackTrace* st = snapshot->get_stack_trace();
315 Handle stacktrace_h;
316 if (st != NULL) {
317 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK);
318 } else {
319 stacktrace_h = Handle();
320 }
321
322 args->push_oop(snapshot_thread);
323 args->push_int(thread_status);
324 args->push_oop(Handle(THREAD, snapshot->blocker_object()));
325 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner()));
326 args->push_long(snapshot->contended_enter_count());
327 args->push_long(contended_time);
328 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count());
329 args->push_long(waited_time);
330 args->push_oop(stacktrace_h);
331 }
332
333 // Helper function to construct a ThreadInfo object
334 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) {
335 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
336 instanceKlassHandle ik (THREAD, k);
337
338 JavaValue result(T_VOID);
339 JavaCallArguments args(14);
340
341 // First allocate a ThreadObj object and
342 // push the receiver as the first argument
343 Handle element = ik->allocate_instance_handle(CHECK_NULL);
344 args.push_oop(element);
345
346 // initialize the arguments for the ThreadInfo constructor
347 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
348
349 // Call ThreadInfo constructor with no locked monitors and synchronizers
350 JavaCalls::call_special(&result,
351 ik,
352 vmSymbols::object_initializer_name(),
353 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(),
354 &args,
355 CHECK_NULL);
356
357 return (instanceOop) element();
358 }
359
360 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot,
361 objArrayHandle monitors_array,
362 typeArrayHandle depths_array,
363 objArrayHandle synchronizers_array,
364 TRAPS) {
365 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
366 instanceKlassHandle ik (THREAD, k);
367
368 JavaValue result(T_VOID);
369 JavaCallArguments args(17);
370
371 // First allocate a ThreadObj object and
372 // push the receiver as the first argument
373 Handle element = ik->allocate_instance_handle(CHECK_NULL);
374 args.push_oop(element);
375
376 // initialize the arguments for the ThreadInfo constructor
377 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
378
379 // push the locked monitors and synchronizers in the arguments
380 args.push_oop(monitors_array);
381 args.push_oop(depths_array);
382 args.push_oop(synchronizers_array);
383
384 // Call ThreadInfo constructor with locked monitors and synchronizers
385 JavaCalls::call_special(&result,
386 ik,
387 vmSymbols::object_initializer_name(),
388 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(),
389 &args,
390 CHECK_NULL);
391
392 return (instanceOop) element();
393 }
394
395
396 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) {
397 if (mgr == NULL) {
398 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
399 }
400 oop mgr_obj = JNIHandles::resolve(mgr);
401 instanceHandle h(THREAD, (instanceOop) mgr_obj);
402
403 Klass* k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL);
404 if (!h->is_a(k)) {
405 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
406 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class",
407 NULL);
408 }
409
410 MemoryManager* gc = MemoryService::get_memory_manager(h);
411 if (gc == NULL || !gc->is_gc_memory_manager()) {
412 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
413 "Invalid GC memory manager",
414 NULL);
415 }
416 return (GCMemoryManager*) gc;
417 }
418
419 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
420 if (obj == NULL) {
421 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
422 }
423
424 oop pool_obj = JNIHandles::resolve(obj);
425 assert(pool_obj->is_instance(), "Should be an instanceOop");
426 instanceHandle ph(THREAD, (instanceOop) pool_obj);
427
428 return MemoryService::get_memory_pool(ph);
429 }
430
431 #endif // INCLUDE_MANAGEMENT
432
433 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
434 int num_threads = ids_ah->length();
435
436 // Validate input thread IDs
437 int i = 0;
438 for (i = 0; i < num_threads; i++) {
439 jlong tid = ids_ah->long_at(i);
440 if (tid <= 0) {
441 // throw exception if invalid thread id.
442 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
443 "Invalid thread ID entry");
444 }
445 }
446 }
447
448 #if INCLUDE_MANAGEMENT
449
450 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) {
451 // check if the element of infoArray is of type ThreadInfo class
452 Klass* threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK);
453 Klass* element_klass = ObjArrayKlass::cast(infoArray_h->klass())->element_klass();
454 if (element_klass != threadinfo_klass) {
455 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
456 "infoArray element type is not ThreadInfo class");
457 }
458 }
459
460
461 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
462 if (obj == NULL) {
463 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
464 }
465
466 oop mgr_obj = JNIHandles::resolve(obj);
467 assert(mgr_obj->is_instance(), "Should be an instanceOop");
468 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
469
470 return MemoryService::get_memory_manager(mh);
471 }
472
473 // Returns a version string and sets major and minor version if
474 // the input parameters are non-null.
475 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env))
476 return JMM_VERSION;
477 JVM_END
478
479 // Gets the list of VM monitoring and management optional supports
480 // Returns 0 if succeeded; otherwise returns non-zero.
481 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support))
482 if (support == NULL) {
483 return -1;
484 }
485 Management::get_optional_support(support);
486 return 0;
487 JVM_END
488
489 // Returns a java.lang.String object containing the input arguments to the VM.
490 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env))
491 ResourceMark rm(THREAD);
492
493 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
494 return NULL;
495 }
496
497 char** vm_flags = Arguments::jvm_flags_array();
498 char** vm_args = Arguments::jvm_args_array();
499 int num_flags = Arguments::num_jvm_flags();
500 int num_args = Arguments::num_jvm_args();
501
502 size_t length = 1; // null terminator
503 int i;
504 for (i = 0; i < num_flags; i++) {
505 length += strlen(vm_flags[i]);
506 }
507 for (i = 0; i < num_args; i++) {
508 length += strlen(vm_args[i]);
509 }
510 // add a space between each argument
511 length += num_flags + num_args - 1;
512
513 // Return the list of input arguments passed to the VM
514 // and preserve the order that the VM processes.
515 char* args = NEW_RESOURCE_ARRAY(char, length);
516 args[0] = '\0';
517 // concatenate all jvm_flags
518 if (num_flags > 0) {
519 strcat(args, vm_flags[0]);
520 for (i = 1; i < num_flags; i++) {
521 strcat(args, " ");
522 strcat(args, vm_flags[i]);
523 }
524 }
525
526 if (num_args > 0 && num_flags > 0) {
527 // append a space if args already contains one or more jvm_flags
528 strcat(args, " ");
529 }
530
531 // concatenate all jvm_args
532 if (num_args > 0) {
533 strcat(args, vm_args[0]);
534 for (i = 1; i < num_args; i++) {
535 strcat(args, " ");
536 strcat(args, vm_args[i]);
537 }
538 }
539
540 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
541 return JNIHandles::make_local(env, hargs());
542 JVM_END
543
544 // Returns an array of java.lang.String object containing the input arguments to the VM.
545 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env))
546 ResourceMark rm(THREAD);
547
548 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
549 return NULL;
550 }
551
552 char** vm_flags = Arguments::jvm_flags_array();
553 char** vm_args = Arguments::jvm_args_array();
554 int num_flags = Arguments::num_jvm_flags();
555 int num_args = Arguments::num_jvm_args();
556
557 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass());
558 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL);
559 objArrayHandle result_h(THREAD, r);
560
561 int index = 0;
562 for (int j = 0; j < num_flags; j++, index++) {
563 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
564 result_h->obj_at_put(index, h());
565 }
566 for (int i = 0; i < num_args; i++, index++) {
567 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
568 result_h->obj_at_put(index, h());
569 }
570 return (jobjectArray) JNIHandles::make_local(env, result_h());
571 JVM_END
572
573 // Returns an array of java/lang/management/MemoryPoolMXBean object
574 // one for each memory pool if obj == null; otherwise returns
575 // an array of memory pools for a given memory manager if
576 // it is a valid memory manager.
577 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj))
578 ResourceMark rm(THREAD);
579
580 int num_memory_pools;
581 MemoryManager* mgr = NULL;
582 if (obj == NULL) {
583 num_memory_pools = MemoryService::num_memory_pools();
584 } else {
585 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL);
586 if (mgr == NULL) {
587 return NULL;
588 }
589 num_memory_pools = mgr->num_memory_pools();
590 }
591
592 // Allocate the resulting MemoryPoolMXBean[] object
593 Klass* k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL);
594 instanceKlassHandle ik (THREAD, k);
595 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL);
596 objArrayHandle poolArray(THREAD, r);
597
598 if (mgr == NULL) {
599 // Get all memory pools
600 for (int i = 0; i < num_memory_pools; i++) {
601 MemoryPool* pool = MemoryService::get_memory_pool(i);
602 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
603 instanceHandle ph(THREAD, p);
604 poolArray->obj_at_put(i, ph());
605 }
606 } else {
607 // Get memory pools managed by a given memory manager
608 for (int i = 0; i < num_memory_pools; i++) {
609 MemoryPool* pool = mgr->get_memory_pool(i);
610 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL);
611 instanceHandle ph(THREAD, p);
612 poolArray->obj_at_put(i, ph());
613 }
614 }
615 return (jobjectArray) JNIHandles::make_local(env, poolArray());
616 JVM_END
617
618 // Returns an array of java/lang/management/MemoryManagerMXBean object
619 // one for each memory manager if obj == null; otherwise returns
620 // an array of memory managers for a given memory pool if
621 // it is a valid memory pool.
622 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj))
623 ResourceMark rm(THREAD);
624
625 int num_mgrs;
626 MemoryPool* pool = NULL;
627 if (obj == NULL) {
628 num_mgrs = MemoryService::num_memory_managers();
629 } else {
630 pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
631 if (pool == NULL) {
632 return NULL;
633 }
634 num_mgrs = pool->num_memory_managers();
635 }
636
637 // Allocate the resulting MemoryManagerMXBean[] object
638 Klass* k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL);
639 instanceKlassHandle ik (THREAD, k);
640 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL);
641 objArrayHandle mgrArray(THREAD, r);
642
643 if (pool == NULL) {
644 // Get all memory managers
645 for (int i = 0; i < num_mgrs; i++) {
646 MemoryManager* mgr = MemoryService::get_memory_manager(i);
647 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
648 instanceHandle ph(THREAD, p);
649 mgrArray->obj_at_put(i, ph());
650 }
651 } else {
652 // Get memory managers for a given memory pool
653 for (int i = 0; i < num_mgrs; i++) {
654 MemoryManager* mgr = pool->get_memory_manager(i);
655 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL);
656 instanceHandle ph(THREAD, p);
657 mgrArray->obj_at_put(i, ph());
658 }
659 }
660 return (jobjectArray) JNIHandles::make_local(env, mgrArray());
661 JVM_END
662
663
664 // Returns a java/lang/management/MemoryUsage object containing the memory usage
665 // of a given memory pool.
666 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj))
667 ResourceMark rm(THREAD);
668
669 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
670 if (pool != NULL) {
671 MemoryUsage usage = pool->get_memory_usage();
672 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
673 return JNIHandles::make_local(env, h());
674 } else {
675 return NULL;
676 }
677 JVM_END
678
679 // Returns a java/lang/management/MemoryUsage object containing the memory usage
680 // of a given memory pool.
681 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj))
682 ResourceMark rm(THREAD);
683
684 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
685 if (pool != NULL) {
686 MemoryUsage usage = pool->get_peak_memory_usage();
687 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
688 return JNIHandles::make_local(env, h());
689 } else {
690 return NULL;
691 }
692 JVM_END
693
694 // Returns a java/lang/management/MemoryUsage object containing the memory usage
695 // of a given memory pool after most recent GC.
696 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj))
697 ResourceMark rm(THREAD);
698
699 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL);
700 if (pool != NULL && pool->is_collected_pool()) {
701 MemoryUsage usage = pool->get_last_collection_usage();
702 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
703 return JNIHandles::make_local(env, h());
704 } else {
705 return NULL;
706 }
707 JVM_END
708
709 // Sets the memory pool sensor for a threshold type
710 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj))
711 if (obj == NULL || sensorObj == NULL) {
712 THROW(vmSymbols::java_lang_NullPointerException());
713 }
714
715 Klass* sensor_klass = Management::sun_management_Sensor_klass(CHECK);
716 oop s = JNIHandles::resolve(sensorObj);
717 assert(s->is_instance(), "Sensor should be an instanceOop");
718 instanceHandle sensor_h(THREAD, (instanceOop) s);
719 if (!sensor_h->is_a(sensor_klass)) {
720 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
721 "Sensor is not an instance of sun.management.Sensor class");
722 }
723
724 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
725 assert(mpool != NULL, "MemoryPool should exist");
726
727 switch (type) {
728 case JMM_USAGE_THRESHOLD_HIGH:
729 case JMM_USAGE_THRESHOLD_LOW:
730 // have only one sensor for threshold high and low
731 mpool->set_usage_sensor_obj(sensor_h);
732 break;
733 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
734 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
735 // have only one sensor for threshold high and low
736 mpool->set_gc_usage_sensor_obj(sensor_h);
737 break;
738 default:
739 assert(false, "Unrecognized type");
740 }
741
742 JVM_END
743
744
745 // Sets the threshold of a given memory pool.
746 // Returns the previous threshold.
747 //
748 // Input parameters:
749 // pool - the MemoryPoolMXBean object
750 // type - threshold type
751 // threshold - the new threshold (must not be negative)
752 //
753 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold))
754 if (threshold < 0) {
755 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
756 "Invalid threshold value",
757 -1);
758 }
759
760 if ((size_t)threshold > max_uintx) {
761 stringStream st;
762 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx);
763 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1);
764 }
765
766 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
767 assert(pool != NULL, "MemoryPool should exist");
768
769 jlong prev = 0;
770 switch (type) {
771 case JMM_USAGE_THRESHOLD_HIGH:
772 if (!pool->usage_threshold()->is_high_threshold_supported()) {
773 return -1;
774 }
775 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold);
776 break;
777
778 case JMM_USAGE_THRESHOLD_LOW:
779 if (!pool->usage_threshold()->is_low_threshold_supported()) {
780 return -1;
781 }
782 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold);
783 break;
784
785 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH:
786 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) {
787 return -1;
788 }
789 // return and the new threshold is effective for the next GC
790 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold);
791
792 case JMM_COLLECTION_USAGE_THRESHOLD_LOW:
793 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) {
794 return -1;
795 }
796 // return and the new threshold is effective for the next GC
797 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold);
798
799 default:
800 assert(false, "Unrecognized type");
801 return -1;
802 }
803
804 // When the threshold is changed, reevaluate if the low memory
805 // detection is enabled.
806 if (prev != threshold) {
807 LowMemoryDetector::recompute_enabled_for_collected_pools();
808 LowMemoryDetector::detect_low_memory(pool);
809 }
810 return prev;
811 JVM_END
812
813 // Returns a java/lang/management/MemoryUsage object representing
814 // the memory usage for the heap or non-heap memory.
815 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap))
816 ResourceMark rm(THREAD);
817
818 // Calculate the memory usage
819 size_t total_init = 0;
820 size_t total_used = 0;
821 size_t total_committed = 0;
822 size_t total_max = 0;
823 bool has_undefined_init_size = false;
824 bool has_undefined_max_size = false;
825
826 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
827 MemoryPool* pool = MemoryService::get_memory_pool(i);
828 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) {
829 MemoryUsage u = pool->get_memory_usage();
830 total_used += u.used();
831 total_committed += u.committed();
832
833 if (u.init_size() == (size_t)-1) {
834 has_undefined_init_size = true;
835 }
836 if (!has_undefined_init_size) {
837 total_init += u.init_size();
838 }
839
840 if (u.max_size() == (size_t)-1) {
841 has_undefined_max_size = true;
842 }
843 if (!has_undefined_max_size) {
844 total_max += u.max_size();
845 }
846 }
847 }
848
849 // if any one of the memory pool has undefined init_size or max_size,
850 // set it to -1
851 if (has_undefined_init_size) {
852 total_init = (size_t)-1;
853 }
854 if (has_undefined_max_size) {
855 total_max = (size_t)-1;
856 }
857
858 MemoryUsage usage((heap ? InitialHeapSize : total_init),
859 total_used,
860 total_committed,
861 (heap ? Universe::heap()->max_capacity() : total_max));
862
863 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
864 return JNIHandles::make_local(env, obj());
865 JVM_END
866
867 // Returns the boolean value of a given attribute.
868 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att))
869 switch (att) {
870 case JMM_VERBOSE_GC:
871 return MemoryService::get_verbose();
872 case JMM_VERBOSE_CLASS:
873 return ClassLoadingService::get_verbose();
874 case JMM_THREAD_CONTENTION_MONITORING:
875 return ThreadService::is_thread_monitoring_contention();
876 case JMM_THREAD_CPU_TIME:
877 return ThreadService::is_thread_cpu_time_enabled();
878 case JMM_THREAD_ALLOCATED_MEMORY:
879 return ThreadService::is_thread_allocated_memory_enabled();
880 default:
881 assert(0, "Unrecognized attribute");
882 return false;
883 }
884 JVM_END
885
886 // Sets the given boolean attribute and returns the previous value.
887 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag))
888 switch (att) {
889 case JMM_VERBOSE_GC:
890 return MemoryService::set_verbose(flag != 0);
891 case JMM_VERBOSE_CLASS:
892 return ClassLoadingService::set_verbose(flag != 0);
893 case JMM_THREAD_CONTENTION_MONITORING:
894 return ThreadService::set_thread_monitoring_contention(flag != 0);
895 case JMM_THREAD_CPU_TIME:
896 return ThreadService::set_thread_cpu_time_enabled(flag != 0);
897 case JMM_THREAD_ALLOCATED_MEMORY:
898 return ThreadService::set_thread_allocated_memory_enabled(flag != 0);
899 default:
900 assert(0, "Unrecognized attribute");
901 return false;
902 }
903 JVM_END
904
905
906 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) {
907 switch (att) {
908 case JMM_GC_TIME_MS:
909 return mgr->gc_time_ms();
910
911 case JMM_GC_COUNT:
912 return mgr->gc_count();
913
914 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
915 // current implementation only has 1 ext attribute
916 return 1;
917
918 default:
919 assert(0, "Unrecognized GC attribute");
920 return -1;
921 }
922 }
923
924 class VmThreadCountClosure: public ThreadClosure {
925 private:
926 int _count;
927 public:
928 VmThreadCountClosure() : _count(0) {};
929 void do_thread(Thread* thread);
930 int count() { return _count; }
931 };
932
933 void VmThreadCountClosure::do_thread(Thread* thread) {
934 // exclude externally visible JavaThreads
935 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
936 return;
937 }
938
939 _count++;
940 }
941
942 static jint get_vm_thread_count() {
943 VmThreadCountClosure vmtcc;
944 {
945 MutexLockerEx ml(Threads_lock);
946 Threads::threads_do(&vmtcc);
947 }
948
949 return vmtcc.count();
950 }
951
952 static jint get_num_flags() {
953 // last flag entry is always NULL, so subtract 1
954 int nFlags = (int) Flag::numFlags - 1;
955 int count = 0;
956 for (int i = 0; i < nFlags; i++) {
957 Flag* flag = &Flag::flags[i];
958 // Exclude the locked (diagnostic, experimental) flags
959 if (flag->is_unlocked() || flag->is_unlocker()) {
960 count++;
961 }
962 }
963 return count;
964 }
965
966 static jlong get_long_attribute(jmmLongAttribute att) {
967 switch (att) {
968 case JMM_CLASS_LOADED_COUNT:
969 return ClassLoadingService::loaded_class_count();
970
971 case JMM_CLASS_UNLOADED_COUNT:
972 return ClassLoadingService::unloaded_class_count();
973
974 case JMM_THREAD_TOTAL_COUNT:
975 return ThreadService::get_total_thread_count();
976
977 case JMM_THREAD_LIVE_COUNT:
978 return ThreadService::get_live_thread_count();
979
980 case JMM_THREAD_PEAK_COUNT:
981 return ThreadService::get_peak_thread_count();
982
983 case JMM_THREAD_DAEMON_COUNT:
984 return ThreadService::get_daemon_thread_count();
985
986 case JMM_JVM_INIT_DONE_TIME_MS:
987 return Management::vm_init_done_time();
988
989 case JMM_JVM_UPTIME_MS:
990 return Management::ticks_to_ms(os::elapsed_counter());
991
992 case JMM_COMPILE_TOTAL_TIME_MS:
993 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
994
995 case JMM_OS_PROCESS_ID:
996 return os::current_process_id();
997
998 // Hotspot-specific counters
999 case JMM_CLASS_LOADED_BYTES:
1000 return ClassLoadingService::loaded_class_bytes();
1001
1002 case JMM_CLASS_UNLOADED_BYTES:
1003 return ClassLoadingService::unloaded_class_bytes();
1004
1005 case JMM_SHARED_CLASS_LOADED_COUNT:
1006 return ClassLoadingService::loaded_shared_class_count();
1007
1008 case JMM_SHARED_CLASS_UNLOADED_COUNT:
1009 return ClassLoadingService::unloaded_shared_class_count();
1010
1011
1012 case JMM_SHARED_CLASS_LOADED_BYTES:
1013 return ClassLoadingService::loaded_shared_class_bytes();
1014
1015 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1016 return ClassLoadingService::unloaded_shared_class_bytes();
1017
1018 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1019 return ClassLoader::classloader_time_ms();
1020
1021 case JMM_VM_GLOBAL_COUNT:
1022 return get_num_flags();
1023
1024 case JMM_SAFEPOINT_COUNT:
1025 return RuntimeService::safepoint_count();
1026
1027 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1028 return RuntimeService::safepoint_sync_time_ms();
1029
1030 case JMM_TOTAL_STOPPED_TIME_MS:
1031 return RuntimeService::safepoint_time_ms();
1032
1033 case JMM_TOTAL_APP_TIME_MS:
1034 return RuntimeService::application_time_ms();
1035
1036 case JMM_VM_THREAD_COUNT:
1037 return get_vm_thread_count();
1038
1039 case JMM_CLASS_INIT_TOTAL_COUNT:
1040 return ClassLoader::class_init_count();
1041
1042 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1043 return ClassLoader::class_init_time_ms();
1044
1045 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1046 return ClassLoader::class_verify_time_ms();
1047
1048 case JMM_METHOD_DATA_SIZE_BYTES:
1049 return ClassLoadingService::class_method_data_size();
1050
1051 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1052 return os::physical_memory();
1053
1054 default:
1055 return -1;
1056 }
1057 }
1058
1059
1060 // Returns the long value of a given attribute.
1061 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att))
1062 if (obj == NULL) {
1063 return get_long_attribute(att);
1064 } else {
1065 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L));
1066 if (mgr != NULL) {
1067 return get_gc_attribute(mgr, att);
1068 }
1069 }
1070 return -1;
1071 JVM_END
1072
1073 // Gets the value of all attributes specified in the given array
1074 // and sets the value in the result array.
1075 // Returns the number of attributes found.
1076 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env,
1077 jobject obj,
1078 jmmLongAttribute* atts,
1079 jint count,
1080 jlong* result))
1081
1082 int num_atts = 0;
1083 if (obj == NULL) {
1084 for (int i = 0; i < count; i++) {
1085 result[i] = get_long_attribute(atts[i]);
1086 if (result[i] != -1) {
1087 num_atts++;
1088 }
1089 }
1090 } else {
1091 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0);
1092 for (int i = 0; i < count; i++) {
1093 result[i] = get_gc_attribute(mgr, atts[i]);
1094 if (result[i] != -1) {
1095 num_atts++;
1096 }
1097 }
1098 }
1099 return num_atts;
1100 JVM_END
1101
1102 // Helper function to do thread dump for a specific list of threads
1103 static void do_thread_dump(ThreadDumpResult* dump_result,
1104 typeArrayHandle ids_ah, // array of thread ID (long[])
1105 int num_threads,
1106 int max_depth,
1107 bool with_locked_monitors,
1108 bool with_locked_synchronizers,
1109 TRAPS) {
1110
1111 // First get an array of threadObj handles.
1112 // A JavaThread may terminate before we get the stack trace.
1113 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
1114 {
1115 MutexLockerEx ml(Threads_lock);
1116 for (int i = 0; i < num_threads; i++) {
1117 jlong tid = ids_ah->long_at(i);
1118 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1119 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL);
1120 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj);
1121 thread_handle_array->append(threadObj_h);
1122 }
1123 }
1124
1125 // Obtain thread dumps and thread snapshot information
1126 VM_ThreadDump op(dump_result,
1127 thread_handle_array,
1128 num_threads,
1129 max_depth, /* stack depth */
1130 with_locked_monitors,
1131 with_locked_synchronizers);
1132 VMThread::execute(&op);
1133 }
1134
1135 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo
1136 // for the thread ID specified in the corresponding entry in
1137 // the given array of thread IDs; or NULL if the thread does not exist
1138 // or has terminated.
1139 //
1140 // Input parameters:
1141 // ids - array of thread IDs
1142 // maxDepth - the maximum depth of stack traces to be dumped:
1143 // maxDepth == -1 requests to dump entire stack trace.
1144 // maxDepth == 0 requests no stack trace.
1145 // infoArray - array of ThreadInfo objects
1146 //
1147 // QQQ - Why does this method return a value instead of void?
1148 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray))
1149 // Check if threads is null
1150 if (ids == NULL || infoArray == NULL) {
1151 THROW_(vmSymbols::java_lang_NullPointerException(), -1);
1152 }
1153
1154 if (maxDepth < -1) {
1155 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1156 "Invalid maxDepth", -1);
1157 }
1158
1159 ResourceMark rm(THREAD);
1160 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1161 typeArrayHandle ids_ah(THREAD, ta);
1162
1163 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1164 objArrayOop oa = objArrayOop(infoArray_obj);
1165 objArrayHandle infoArray_h(THREAD, oa);
1166
1167 // validate the thread id array
1168 validate_thread_id_array(ids_ah, CHECK_0);
1169
1170 // validate the ThreadInfo[] parameters
1171 validate_thread_info_array(infoArray_h, CHECK_0);
1172
1173 // infoArray must be of the same length as the given array of thread IDs
1174 int num_threads = ids_ah->length();
1175 if (num_threads != infoArray_h->length()) {
1176 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1177 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1);
1178 }
1179
1180 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1181 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1182
1183 // Must use ThreadDumpResult to store the ThreadSnapshot.
1184 // GC may occur after the thread snapshots are taken but before
1185 // this function returns. The threadObj and other oops kept
1186 // in the ThreadSnapshot are marked and adjusted during GC.
1187 ThreadDumpResult dump_result(num_threads);
1188
1189 if (maxDepth == 0) {
1190 // no stack trace dumped - do not need to stop the world
1191 {
1192 MutexLockerEx ml(Threads_lock);
1193 for (int i = 0; i < num_threads; i++) {
1194 jlong tid = ids_ah->long_at(i);
1195 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1196 ThreadSnapshot* ts;
1197 if (jt == NULL) {
1198 // if the thread does not exist or now it is terminated,
1199 // create dummy snapshot
1200 ts = new ThreadSnapshot();
1201 } else {
1202 ts = new ThreadSnapshot(jt);
1203 }
1204 dump_result.add_thread_snapshot(ts);
1205 }
1206 }
1207 } else {
1208 // obtain thread dump with the specific list of threads with stack trace
1209 do_thread_dump(&dump_result,
1210 ids_ah,
1211 num_threads,
1212 maxDepth,
1213 false, /* no locked monitor */
1214 false, /* no locked synchronizers */
1215 CHECK_0);
1216 }
1217
1218 int num_snapshots = dump_result.num_snapshots();
1219 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1220 int index = 0;
1221 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1222 // For each thread, create an java/lang/management/ThreadInfo object
1223 // and fill with the thread information
1224
1225 if (ts->threadObj() == NULL) {
1226 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1227 infoArray_h->obj_at_put(index, NULL);
1228 continue;
1229 }
1230
1231 // Create java.lang.management.ThreadInfo object
1232 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1233 infoArray_h->obj_at_put(index, info_obj);
1234 }
1235 return 0;
1236 JVM_END
1237
1238 // Dump thread info for the specified threads.
1239 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1240 // for the thread ID specified in the corresponding entry in
1241 // the given array of thread IDs; or NULL if the thread does not exist
1242 // or has terminated.
1243 //
1244 // Input parameter:
1245 // ids - array of thread IDs; NULL indicates all live threads
1246 // locked_monitors - if true, dump locked object monitors
1247 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1248 //
1249 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1250 ResourceMark rm(THREAD);
1251
1252 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1253 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1254
1255 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1256 int num_threads = (ta != NULL ? ta->length() : 0);
1257 typeArrayHandle ids_ah(THREAD, ta);
1258
1259 ThreadDumpResult dump_result(num_threads); // can safepoint
1260
1261 if (ids_ah() != NULL) {
1262
1263 // validate the thread id array
1264 validate_thread_id_array(ids_ah, CHECK_NULL);
1265
1266 // obtain thread dump of a specific list of threads
1267 do_thread_dump(&dump_result,
1268 ids_ah,
1269 num_threads,
1270 -1, /* entire stack */
1271 (locked_monitors ? true : false), /* with locked monitors */
1272 (locked_synchronizers ? true : false), /* with locked synchronizers */
1273 CHECK_NULL);
1274 } else {
1275 // obtain thread dump of all threads
1276 VM_ThreadDump op(&dump_result,
1277 -1, /* entire stack */
1278 (locked_monitors ? true : false), /* with locked monitors */
1279 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1280 VMThread::execute(&op);
1281 }
1282
1283 int num_snapshots = dump_result.num_snapshots();
1284
1285 // create the result ThreadInfo[] object
1286 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1287 instanceKlassHandle ik (THREAD, k);
1288 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1289 objArrayHandle result_h(THREAD, r);
1290
1291 int index = 0;
1292 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1293 if (ts->threadObj() == NULL) {
1294 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1295 result_h->obj_at_put(index, NULL);
1296 continue;
1297 }
1298
1299 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1300 assert(stacktrace != NULL, "Must have a stack trace dumped");
1301
1302 // Create Object[] filled with locked monitors
1303 // Create int[] filled with the stack depth where a monitor was locked
1304 int num_frames = stacktrace->get_stack_depth();
1305 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1306
1307 // Count the total number of locked monitors
1308 for (int i = 0; i < num_frames; i++) {
1309 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1310 num_locked_monitors += frame->num_locked_monitors();
1311 }
1312
1313 objArrayHandle monitors_array;
1314 typeArrayHandle depths_array;
1315 objArrayHandle synchronizers_array;
1316
1317 if (locked_monitors) {
1318 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1319 // where the thread locked it
1320 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1321 objArrayHandle mh(THREAD, array);
1322 monitors_array = mh;
1323
1324 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1325 typeArrayHandle dh(THREAD, tarray);
1326 depths_array = dh;
1327
1328 int count = 0;
1329 int j = 0;
1330 for (int depth = 0; depth < num_frames; depth++) {
1331 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1332 int len = frame->num_locked_monitors();
1333 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1334 for (j = 0; j < len; j++) {
1335 oop monitor = locked_monitors->at(j);
1336 assert(monitor != NULL, "must be a Java object");
1337 monitors_array->obj_at_put(count, monitor);
1338 depths_array->int_at_put(count, depth);
1339 count++;
1340 }
1341 }
1342
1343 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1344 for (j = 0; j < jni_locked_monitors->length(); j++) {
1345 oop object = jni_locked_monitors->at(j);
1346 assert(object != NULL, "must be a Java object");
1347 monitors_array->obj_at_put(count, object);
1348 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1349 depths_array->int_at_put(count, -1);
1350 count++;
1351 }
1352 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1353 }
1354
1355 if (locked_synchronizers) {
1356 // Create Object[] filled with locked JSR-166 synchronizers
1357 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1358 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1359 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1360 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1361
1362 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1363 objArrayHandle sh(THREAD, array);
1364 synchronizers_array = sh;
1365
1366 for (int k = 0; k < num_locked_synchronizers; k++) {
1367 synchronizers_array->obj_at_put(k, locks->at(k));
1368 }
1369 }
1370
1371 // Create java.lang.management.ThreadInfo object
1372 instanceOop info_obj = Management::create_thread_info_instance(ts,
1373 monitors_array,
1374 depths_array,
1375 synchronizers_array,
1376 CHECK_NULL);
1377 result_h->obj_at_put(index, info_obj);
1378 }
1379
1380 return (jobjectArray) JNIHandles::make_local(env, result_h());
1381 JVM_END
1382
1383 // Returns an array of Class objects.
1384 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1385 ResourceMark rm(THREAD);
1386
1387 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1388
1389 int num_classes = lce.num_loaded_classes();
1390 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1391 objArrayHandle classes_ah(THREAD, r);
1392
1393 for (int i = 0; i < num_classes; i++) {
1394 KlassHandle kh = lce.get_klass(i);
1395 oop mirror = kh()->java_mirror();
1396 classes_ah->obj_at_put(i, mirror);
1397 }
1398
1399 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1400 JVM_END
1401
1402 // Reset statistic. Return true if the requested statistic is reset.
1403 // Otherwise, return false.
1404 //
1405 // Input parameters:
1406 // obj - specify which instance the statistic associated with to be reset
1407 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1408 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1409 // type - the type of statistic to be reset
1410 //
1411 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1412 ResourceMark rm(THREAD);
1413
1414 switch (type) {
1415 case JMM_STAT_PEAK_THREAD_COUNT:
1416 ThreadService::reset_peak_thread_count();
1417 return true;
1418
1419 case JMM_STAT_THREAD_CONTENTION_COUNT:
1420 case JMM_STAT_THREAD_CONTENTION_TIME: {
1421 jlong tid = obj.j;
1422 if (tid < 0) {
1423 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1424 }
1425
1426 // Look for the JavaThread of this given tid
1427 MutexLockerEx ml(Threads_lock);
1428 if (tid == 0) {
1429 // reset contention statistics for all threads if tid == 0
1430 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1431 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1432 ThreadService::reset_contention_count_stat(java_thread);
1433 } else {
1434 ThreadService::reset_contention_time_stat(java_thread);
1435 }
1436 }
1437 } else {
1438 // reset contention statistics for a given thread
1439 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(tid);
1440 if (java_thread == NULL) {
1441 return false;
1442 }
1443
1444 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1445 ThreadService::reset_contention_count_stat(java_thread);
1446 } else {
1447 ThreadService::reset_contention_time_stat(java_thread);
1448 }
1449 }
1450 return true;
1451 break;
1452 }
1453 case JMM_STAT_PEAK_POOL_USAGE: {
1454 jobject o = obj.l;
1455 if (o == NULL) {
1456 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1457 }
1458
1459 oop pool_obj = JNIHandles::resolve(o);
1460 assert(pool_obj->is_instance(), "Should be an instanceOop");
1461 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1462
1463 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1464 if (pool != NULL) {
1465 pool->reset_peak_memory_usage();
1466 return true;
1467 }
1468 break;
1469 }
1470 case JMM_STAT_GC_STAT: {
1471 jobject o = obj.l;
1472 if (o == NULL) {
1473 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1474 }
1475
1476 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1477 if (mgr != NULL) {
1478 mgr->reset_gc_stat();
1479 return true;
1480 }
1481 break;
1482 }
1483 default:
1484 assert(0, "Unknown Statistic Type");
1485 }
1486 return false;
1487 JVM_END
1488
1489 // Returns the fast estimate of CPU time consumed by
1490 // a given thread (in nanoseconds).
1491 // If thread_id == 0, return CPU time for the current thread.
1492 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1493 if (!os::is_thread_cpu_time_supported()) {
1494 return -1;
1495 }
1496
1497 if (thread_id < 0) {
1498 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1499 "Invalid thread ID", -1);
1500 }
1501
1502 JavaThread* java_thread = NULL;
1503 if (thread_id == 0) {
1504 // current thread
1505 return os::current_thread_cpu_time();
1506 } else {
1507 MutexLockerEx ml(Threads_lock);
1508 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
1509 if (java_thread != NULL) {
1510 return os::thread_cpu_time((Thread*) java_thread);
1511 }
1512 }
1513 return -1;
1514 JVM_END
1515
1516 // Returns a String array of all VM global flag names
1517 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1518 // last flag entry is always NULL, so subtract 1
1519 int nFlags = (int) Flag::numFlags - 1;
1520 // allocate a temp array
1521 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1522 nFlags, CHECK_0);
1523 objArrayHandle flags_ah(THREAD, r);
1524 int num_entries = 0;
1525 for (int i = 0; i < nFlags; i++) {
1526 Flag* flag = &Flag::flags[i];
1527 // Exclude notproduct and develop flags in product builds.
1528 if (flag->is_constant_in_binary()) {
1529 continue;
1530 }
1531 // Exclude the locked (experimental, diagnostic) flags
1532 if (flag->is_unlocked() || flag->is_unlocker()) {
1533 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0);
1534 flags_ah->obj_at_put(num_entries, s());
1535 num_entries++;
1536 }
1537 }
1538
1539 if (num_entries < nFlags) {
1540 // Return array of right length
1541 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1542 for(int i = 0; i < num_entries; i++) {
1543 res->obj_at_put(i, flags_ah->obj_at(i));
1544 }
1545 return (jobjectArray)JNIHandles::make_local(env, res);
1546 }
1547
1548 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1549 JVM_END
1550
1551 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1552 // can't be determined, true otherwise. If false is returned, then *global
1553 // will be incomplete and invalid.
1554 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1555 Handle flag_name;
1556 if (name() == NULL) {
1557 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false);
1558 } else {
1559 flag_name = name;
1560 }
1561 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1562
1563 if (flag->is_bool()) {
1564 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1565 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1566 } else if (flag->is_intx()) {
1567 global->value.j = (jlong)flag->get_intx();
1568 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1569 } else if (flag->is_uintx()) {
1570 global->value.j = (jlong)flag->get_uintx();
1571 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1572 } else if (flag->is_uint64_t()) {
1573 global->value.j = (jlong)flag->get_uint64_t();
1574 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1575 } else if (flag->is_double()) {
1576 global->value.d = (jdouble)flag->get_double();
1577 global->type = JMM_VMGLOBAL_TYPE_JDOUBLE;
1578 } else if (flag->is_size_t()) {
1579 global->value.j = (jlong)flag->get_size_t();
1580 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1581 } else if (flag->is_ccstr()) {
1582 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1583 global->value.l = (jobject)JNIHandles::make_local(env, str());
1584 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1585 } else {
1586 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1587 return false;
1588 }
1589
1590 global->writeable = flag->is_writeable();
1591 global->external = flag->is_external();
1592 switch (flag->get_origin()) {
1593 case Flag::DEFAULT:
1594 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1595 break;
1596 case Flag::COMMAND_LINE:
1597 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1598 break;
1599 case Flag::ENVIRON_VAR:
1600 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1601 break;
1602 case Flag::CONFIG_FILE:
1603 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1604 break;
1605 case Flag::MANAGEMENT:
1606 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1607 break;
1608 case Flag::ERGONOMIC:
1609 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1610 break;
1611 case Flag::ATTACH_ON_DEMAND:
1612 global->origin = JMM_VMGLOBAL_ORIGIN_ATTACH_ON_DEMAND;
1613 break;
1614 default:
1615 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1616 }
1617
1618 return true;
1619 }
1620
1621 // Fill globals array of count length with jmmVMGlobal entries
1622 // specified by names. If names == NULL, fill globals array
1623 // with all Flags. Return value is number of entries
1624 // created in globals.
1625 // If a Flag with a given name in an array element does not
1626 // exist, globals[i].name will be set to NULL.
1627 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1628 jobjectArray names,
1629 jmmVMGlobal *globals,
1630 jint count))
1631
1632
1633 if (globals == NULL) {
1634 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1635 }
1636
1637 ResourceMark rm(THREAD);
1638
1639 if (names != NULL) {
1640 // return the requested globals
1641 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1642 objArrayHandle names_ah(THREAD, ta);
1643 // Make sure we have a String array
1644 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1645 if (element_klass != SystemDictionary::String_klass()) {
1646 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1647 "Array element type is not String class", 0);
1648 }
1649
1650 int names_length = names_ah->length();
1651 int num_entries = 0;
1652 for (int i = 0; i < names_length && i < count; i++) {
1653 oop s = names_ah->obj_at(i);
1654 if (s == NULL) {
1655 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1656 }
1657
1658 Handle sh(THREAD, s);
1659 char* str = java_lang_String::as_utf8_string(s);
1660 Flag* flag = Flag::find_flag(str, strlen(str));
1661 if (flag != NULL &&
1662 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1663 num_entries++;
1664 } else {
1665 globals[i].name = NULL;
1666 }
1667 }
1668 return num_entries;
1669 } else {
1670 // return all globals if names == NULL
1671
1672 // last flag entry is always NULL, so subtract 1
1673 int nFlags = (int) Flag::numFlags - 1;
1674 Handle null_h;
1675 int num_entries = 0;
1676 for (int i = 0; i < nFlags && num_entries < count; i++) {
1677 Flag* flag = &Flag::flags[i];
1678 // Exclude notproduct and develop flags in product builds.
1679 if (flag->is_constant_in_binary()) {
1680 continue;
1681 }
1682 // Exclude the locked (diagnostic, experimental) flags
1683 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1684 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1685 num_entries++;
1686 }
1687 }
1688 return num_entries;
1689 }
1690 JVM_END
1691
1692 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1693 ResourceMark rm(THREAD);
1694
1695 oop fn = JNIHandles::resolve_external_guard(flag_name);
1696 if (fn == NULL) {
1697 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1698 "The flag name cannot be null.");
1699 }
1700 char* name = java_lang_String::as_utf8_string(fn);
1701 Flag* flag = Flag::find_flag(name, strlen(name));
1702 if (flag == NULL) {
1703 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1704 "Flag does not exist.");
1705 }
1706 if (!flag->is_writeable()) {
1707 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1708 "This flag is not writeable.");
1709 }
1710
1711 bool succeed = false;
1712 if (flag->is_bool()) {
1713 bool bvalue = (new_value.z == JNI_TRUE ? true : false);
1714 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT);
1715 } else if (flag->is_intx()) {
1716 intx ivalue = (intx)new_value.j;
1717 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT);
1718 } else if (flag->is_uintx()) {
1719 uintx uvalue = (uintx)new_value.j;
1720
1721 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) {
1722 FormatBuffer<80> err_msg("%s", "");
1723 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) {
1724 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1725 }
1726 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) {
1727 FormatBuffer<80> err_msg("%s", "");
1728 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) {
1729 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1730 }
1731 }
1732 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT);
1733 } else if (flag->is_uint64_t()) {
1734 uint64_t uvalue = (uint64_t)new_value.j;
1735 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT);
1736 } else if (flag->is_size_t()) {
1737 size_t svalue = (size_t)new_value.j;
1738 succeed = CommandLineFlags::size_tAtPut(name, &svalue, Flag::MANAGEMENT);
1739 } else if (flag->is_ccstr()) {
1740 oop str = JNIHandles::resolve_external_guard(new_value.l);
1741 if (str == NULL) {
1742 THROW(vmSymbols::java_lang_NullPointerException());
1743 }
1744 ccstr svalue = java_lang_String::as_utf8_string(str);
1745 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT);
1746 if (succeed) {
1747 FREE_C_HEAP_ARRAY(char, svalue, mtInternal);
1748 }
1749 }
1750 assert(succeed, "Setting flag should succeed");
1751 JVM_END
1752
1753 class ThreadTimesClosure: public ThreadClosure {
1754 private:
1755 objArrayHandle _names_strings;
1756 char **_names_chars;
1757 typeArrayHandle _times;
1758 int _names_len;
1759 int _times_len;
1760 int _count;
1761
1762 public:
1763 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1764 ~ThreadTimesClosure();
1765 virtual void do_thread(Thread* thread);
1766 void do_unlocked();
1767 int count() { return _count; }
1768 };
1769
1770 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1771 typeArrayHandle times) {
1772 assert(names() != NULL, "names was NULL");
1773 assert(times() != NULL, "times was NULL");
1774 _names_strings = names;
1775 _names_len = names->length();
1776 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1777 _times = times;
1778 _times_len = times->length();
1779 _count = 0;
1780 }
1781
1782 //
1783 // Called with Threads_lock held
1784 //
1785 void ThreadTimesClosure::do_thread(Thread* thread) {
1786 assert(thread != NULL, "thread was NULL");
1787
1788 // exclude externally visible JavaThreads
1789 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1790 return;
1791 }
1792
1793 if (_count >= _names_len || _count >= _times_len) {
1794 // skip if the result array is not big enough
1795 return;
1796 }
1797
1798 EXCEPTION_MARK;
1799 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1800
1801 assert(thread->name() != NULL, "All threads should have a name");
1802 _names_chars[_count] = os::strdup(thread->name());
1803 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1804 os::thread_cpu_time(thread) : -1);
1805 _count++;
1806 }
1807
1808 // Called without Threads_lock, we can allocate String objects.
1809 void ThreadTimesClosure::do_unlocked() {
1810
1811 EXCEPTION_MARK;
1812 for (int i = 0; i < _count; i++) {
1813 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1814 _names_strings->obj_at_put(i, s());
1815 }
1816 }
1817
1818 ThreadTimesClosure::~ThreadTimesClosure() {
1819 for (int i = 0; i < _count; i++) {
1820 os::free(_names_chars[i]);
1821 }
1822 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal);
1823 }
1824
1825 // Fills names with VM internal thread names and times with the corresponding
1826 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1827 // If the element type of names is not String, an IllegalArgumentException is
1828 // thrown.
1829 // If an array is not large enough to hold all the entries, only the entries
1830 // that fit will be returned. Return value is the number of VM internal
1831 // threads entries.
1832 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1833 jobjectArray names,
1834 jlongArray times))
1835 if (names == NULL || times == NULL) {
1836 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1837 }
1838 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1839 objArrayHandle names_ah(THREAD, na);
1840
1841 // Make sure we have a String array
1842 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1843 if (element_klass != SystemDictionary::String_klass()) {
1844 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1845 "Array element type is not String class", 0);
1846 }
1847
1848 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1849 typeArrayHandle times_ah(THREAD, ta);
1850
1851 ThreadTimesClosure ttc(names_ah, times_ah);
1852 {
1853 MutexLockerEx ml(Threads_lock);
1854 Threads::threads_do(&ttc);
1855 }
1856 ttc.do_unlocked();
1857 return ttc.count();
1858 JVM_END
1859
1860 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1861 ResourceMark rm(THREAD);
1862
1863 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1864 VMThread::execute(&op);
1865
1866 DeadlockCycle* deadlocks = op.result();
1867 if (deadlocks == NULL) {
1868 // no deadlock found and return
1869 return Handle();
1870 }
1871
1872 int num_threads = 0;
1873 DeadlockCycle* cycle;
1874 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1875 num_threads += cycle->num_threads();
1876 }
1877
1878 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1879 objArrayHandle threads_ah(THREAD, r);
1880
1881 int index = 0;
1882 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1883 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1884 int len = deadlock_threads->length();
1885 for (int i = 0; i < len; i++) {
1886 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1887 index++;
1888 }
1889 }
1890 return threads_ah;
1891 }
1892
1893 // Finds cycles of threads that are deadlocked involved in object monitors
1894 // and JSR-166 synchronizers.
1895 // Returns an array of Thread objects which are in deadlock, if any.
1896 // Otherwise, returns NULL.
1897 //
1898 // Input parameter:
1899 // object_monitors_only - if true, only check object monitors
1900 //
1901 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1902 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
1903 return (jobjectArray) JNIHandles::make_local(env, result());
1904 JVM_END
1905
1906 // Finds cycles of threads that are deadlocked on monitor locks
1907 // Returns an array of Thread objects which are in deadlock, if any.
1908 // Otherwise, returns NULL.
1909 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1910 Handle result = find_deadlocks(true, CHECK_0);
1911 return (jobjectArray) JNIHandles::make_local(env, result());
1912 JVM_END
1913
1914 // Gets the information about GC extension attributes including
1915 // the name of the attribute, its type, and a short description.
1916 //
1917 // Input parameters:
1918 // mgr - GC memory manager
1919 // info - caller allocated array of jmmExtAttributeInfo
1920 // count - number of elements of the info array
1921 //
1922 // Returns the number of GC extension attributes filled in the info array; or
1923 // -1 if info is not big enough
1924 //
1925 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1926 // All GC memory managers have 1 attribute (number of GC threads)
1927 if (count == 0) {
1928 return 0;
1929 }
1930
1931 if (info == NULL) {
1932 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1933 }
1934
1935 info[0].name = "GcThreadCount";
1936 info[0].type = 'I';
1937 info[0].description = "Number of GC threads";
1938 return 1;
1939 JVM_END
1940
1941 // verify the given array is an array of java/lang/management/MemoryUsage objects
1942 // of a given length and return the objArrayOop
1943 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1944 if (array == NULL) {
1945 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1946 }
1947
1948 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1949 objArrayHandle array_h(THREAD, oa);
1950
1951 // array must be of the given length
1952 if (length != array_h->length()) {
1953 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1954 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
1955 }
1956
1957 // check if the element of array is of type MemoryUsage class
1958 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
1959 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1960 if (element_klass != usage_klass) {
1961 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1962 "The element type is not MemoryUsage class", 0);
1963 }
1964
1965 return array_h();
1966 }
1967
1968 // Gets the statistics of the last GC of a given GC memory manager.
1969 // Input parameters:
1970 // obj - GarbageCollectorMXBean object
1971 // gc_stat - caller allocated jmmGCStat where:
1972 // a. before_gc_usage - array of MemoryUsage objects
1973 // b. after_gc_usage - array of MemoryUsage objects
1974 // c. gc_ext_attributes_values_size is set to the
1975 // gc_ext_attribute_values array allocated
1976 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1977 //
1978 // On return,
1979 // gc_index == 0 indicates no GC statistics available
1980 //
1981 // before_gc_usage and after_gc_usage - filled with per memory pool
1982 // before and after GC usage in the same order as the memory pools
1983 // returned by GetMemoryPools for a given GC memory manager.
1984 // num_gc_ext_attributes indicates the number of elements in
1985 // the gc_ext_attribute_values array is filled; or
1986 // -1 if the gc_ext_attributes_values array is not big enough
1987 //
1988 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1989 ResourceMark rm(THREAD);
1990
1991 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
1992 THROW(vmSymbols::java_lang_NullPointerException());
1993 }
1994
1995 // Get the GCMemoryManager
1996 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1997
1998 // Make a copy of the last GC statistics
1999 // GC may occur while constructing the last GC information
2000 int num_pools = MemoryService::num_memory_pools();
2001 GCStatInfo stat(num_pools);
2002 if (mgr->get_last_gc_stat(&stat) == 0) {
2003 gc_stat->gc_index = 0;
2004 return;
2005 }
2006
2007 gc_stat->gc_index = stat.gc_index();
2008 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
2009 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
2010
2011 // Current implementation does not have GC extension attributes
2012 gc_stat->num_gc_ext_attributes = 0;
2013
2014 // Fill the arrays of MemoryUsage objects with before and after GC
2015 // per pool memory usage
2016 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
2017 num_pools,
2018 CHECK);
2019 objArrayHandle usage_before_gc_ah(THREAD, bu);
2020
2021 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
2022 num_pools,
2023 CHECK);
2024 objArrayHandle usage_after_gc_ah(THREAD, au);
2025
2026 for (int i = 0; i < num_pools; i++) {
2027 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
2028 Handle after_usage;
2029
2030 MemoryUsage u = stat.after_gc_usage_for_pool(i);
2031 if (u.max_size() == 0 && u.used() > 0) {
2032 // If max size == 0, this pool is a survivor space.
2033 // Set max size = -1 since the pools will be swapped after GC.
2034 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
2035 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
2036 } else {
2037 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
2038 }
2039 usage_before_gc_ah->obj_at_put(i, before_usage());
2040 usage_after_gc_ah->obj_at_put(i, after_usage());
2041 }
2042
2043 if (gc_stat->gc_ext_attribute_values_size > 0) {
2044 // Current implementation only has 1 attribute (number of GC threads)
2045 // The type is 'I'
2046 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2047 }
2048 JVM_END
2049
2050 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2051 ResourceMark rm(THREAD);
2052 // Get the GCMemoryManager
2053 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2054 mgr->set_notification_enabled(enabled?true:false);
2055 JVM_END
2056
2057 // Dump heap - Returns 0 if succeeds.
2058 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2059 #if INCLUDE_SERVICES
2060 ResourceMark rm(THREAD);
2061 oop on = JNIHandles::resolve_external_guard(outputfile);
2062 if (on == NULL) {
2063 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2064 "Output file name cannot be null.", -1);
2065 }
2066 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1));
2067 if (name == NULL) {
2068 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2069 "Output file name cannot be null.", -1);
2070 }
2071 HeapDumper dumper(live ? true : false);
2072 if (dumper.dump(name) != 0) {
2073 const char* errmsg = dumper.error_as_C_string();
2074 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2075 }
2076 return 0;
2077 #else // INCLUDE_SERVICES
2078 return -1;
2079 #endif // INCLUDE_SERVICES
2080 JVM_END
2081
2082 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2083 ResourceMark rm(THREAD);
2084 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2085 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2086 dcmd_list->length(), CHECK_NULL);
2087 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2088 for (int i = 0; i < dcmd_list->length(); i++) {
2089 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2090 cmd_array->obj_at_put(i, cmd_name);
2091 }
2092 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2093 JVM_END
2094
2095 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2096 dcmdInfo* infoArray))
2097 if (cmds == NULL || infoArray == NULL) {
2098 THROW(vmSymbols::java_lang_NullPointerException());
2099 }
2100
2101 ResourceMark rm(THREAD);
2102
2103 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2104 objArrayHandle cmds_ah(THREAD, ca);
2105
2106 // Make sure we have a String array
2107 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2108 if (element_klass != SystemDictionary::String_klass()) {
2109 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2110 "Array element type is not String class");
2111 }
2112
2113 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2114
2115 int num_cmds = cmds_ah->length();
2116 for (int i = 0; i < num_cmds; i++) {
2117 oop cmd = cmds_ah->obj_at(i);
2118 if (cmd == NULL) {
2119 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2120 "Command name cannot be null.");
2121 }
2122 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2123 if (cmd_name == NULL) {
2124 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2125 "Command name cannot be null.");
2126 }
2127 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2128 if (pos == -1) {
2129 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2130 "Unknown diagnostic command");
2131 }
2132 DCmdInfo* info = info_list->at(pos);
2133 infoArray[i].name = info->name();
2134 infoArray[i].description = info->description();
2135 infoArray[i].impact = info->impact();
2136 JavaPermission p = info->permission();
2137 infoArray[i].permission_class = p._class;
2138 infoArray[i].permission_name = p._name;
2139 infoArray[i].permission_action = p._action;
2140 infoArray[i].num_arguments = info->num_arguments();
2141 infoArray[i].enabled = info->is_enabled();
2142 }
2143 JVM_END
2144
2145 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2146 jstring command, dcmdArgInfo* infoArray))
2147 ResourceMark rm(THREAD);
2148 oop cmd = JNIHandles::resolve_external_guard(command);
2149 if (cmd == NULL) {
2150 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2151 "Command line cannot be null.");
2152 }
2153 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2154 if (cmd_name == NULL) {
2155 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2156 "Command line content cannot be null.");
2157 }
2158 DCmd* dcmd = NULL;
2159 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2160 strlen(cmd_name));
2161 if (factory != NULL) {
2162 dcmd = factory->create_resource_instance(NULL);
2163 }
2164 if (dcmd == NULL) {
2165 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2166 "Unknown diagnostic command");
2167 }
2168 DCmdMark mark(dcmd);
2169 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2170 if (array->length() == 0) {
2171 return;
2172 }
2173 for (int i = 0; i < array->length(); i++) {
2174 infoArray[i].name = array->at(i)->name();
2175 infoArray[i].description = array->at(i)->description();
2176 infoArray[i].type = array->at(i)->type();
2177 infoArray[i].default_string = array->at(i)->default_string();
2178 infoArray[i].mandatory = array->at(i)->is_mandatory();
2179 infoArray[i].option = array->at(i)->is_option();
2180 infoArray[i].multiple = array->at(i)->is_multiple();
2181 infoArray[i].position = array->at(i)->position();
2182 }
2183 return;
2184 JVM_END
2185
2186 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2187 ResourceMark rm(THREAD);
2188 oop cmd = JNIHandles::resolve_external_guard(commandline);
2189 if (cmd == NULL) {
2190 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2191 "Command line cannot be null.");
2192 }
2193 char* cmdline = java_lang_String::as_utf8_string(cmd);
2194 if (cmdline == NULL) {
2195 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2196 "Command line content cannot be null.");
2197 }
2198 bufferedStream output;
2199 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2200 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2201 return (jstring) JNIHandles::make_local(env, result);
2202 JVM_END
2203
2204 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2205 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2206 JVM_END
2207
2208 jlong Management::ticks_to_ms(jlong ticks) {
2209 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2210 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2211 * (double)1000.0);
2212 }
2213 #endif // INCLUDE_MANAGEMENT
2214
2215 // Gets an array containing the amount of memory allocated on the Java
2216 // heap for a set of threads (in bytes). Each element of the array is
2217 // the amount of memory allocated for the thread ID specified in the
2218 // corresponding entry in the given array of thread IDs; or -1 if the
2219 // thread does not exist or has terminated.
2220 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2221 jlongArray sizeArray))
2222 // Check if threads is null
2223 if (ids == NULL || sizeArray == NULL) {
2224 THROW(vmSymbols::java_lang_NullPointerException());
2225 }
2226
2227 ResourceMark rm(THREAD);
2228 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2229 typeArrayHandle ids_ah(THREAD, ta);
2230
2231 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2232 typeArrayHandle sizeArray_h(THREAD, sa);
2233
2234 // validate the thread id array
2235 validate_thread_id_array(ids_ah, CHECK);
2236
2237 // sizeArray must be of the same length as the given array of thread IDs
2238 int num_threads = ids_ah->length();
2239 if (num_threads != sizeArray_h->length()) {
2240 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2241 "The length of the given long array does not match the length of "
2242 "the given array of thread IDs");
2243 }
2244
2245 MutexLockerEx ml(Threads_lock);
2246 for (int i = 0; i < num_threads; i++) {
2247 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2248 if (java_thread != NULL) {
2249 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2250 }
2251 }
2252 JVM_END
2253
2254 // Returns the CPU time consumed by a given thread (in nanoseconds).
2255 // If thread_id == 0, CPU time for the current thread is returned.
2256 // If user_sys_cpu_time = true, user level and system CPU time of
2257 // a given thread is returned; otherwise, only user level CPU time
2258 // is returned.
2259 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2260 if (!os::is_thread_cpu_time_supported()) {
2261 return -1;
2262 }
2263
2264 if (thread_id < 0) {
2265 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2266 "Invalid thread ID", -1);
2267 }
2268
2269 JavaThread* java_thread = NULL;
2270 if (thread_id == 0) {
2271 // current thread
2272 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2273 } else {
2274 MutexLockerEx ml(Threads_lock);
2275 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
2276 if (java_thread != NULL) {
2277 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2278 }
2279 }
2280 return -1;
2281 JVM_END
2282
2283 // Gets an array containing the CPU times consumed by a set of threads
2284 // (in nanoseconds). Each element of the array is the CPU time for the
2285 // thread ID specified in the corresponding entry in the given array
2286 // of thread IDs; or -1 if the thread does not exist or has terminated.
2287 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2288 // for the given thread is returned; otherwise, only user level CPU time
2289 // is returned.
2290 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2291 jlongArray timeArray,
2292 jboolean user_sys_cpu_time))
2293 // Check if threads is null
2294 if (ids == NULL || timeArray == NULL) {
2295 THROW(vmSymbols::java_lang_NullPointerException());
2296 }
2297
2298 ResourceMark rm(THREAD);
2299 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2300 typeArrayHandle ids_ah(THREAD, ta);
2301
2302 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2303 typeArrayHandle timeArray_h(THREAD, tia);
2304
2305 // validate the thread id array
2306 validate_thread_id_array(ids_ah, CHECK);
2307
2308 // timeArray must be of the same length as the given array of thread IDs
2309 int num_threads = ids_ah->length();
2310 if (num_threads != timeArray_h->length()) {
2311 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2312 "The length of the given long array does not match the length of "
2313 "the given array of thread IDs");
2314 }
2315
2316 MutexLockerEx ml(Threads_lock);
2317 for (int i = 0; i < num_threads; i++) {
2318 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2319 if (java_thread != NULL) {
2320 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2321 user_sys_cpu_time != 0));
2322 }
2323 }
2324 JVM_END
2325
2326
2327
2328 #if INCLUDE_MANAGEMENT
2329 const struct jmmInterface_1_ jmm_interface = {
2330 NULL,
2331 NULL,
2332 jmm_GetVersion,
2333 jmm_GetOptionalSupport,
2334 jmm_GetInputArguments,
2335 jmm_GetThreadInfo,
2336 jmm_GetInputArgumentArray,
2337 jmm_GetMemoryPools,
2338 jmm_GetMemoryManagers,
2339 jmm_GetMemoryPoolUsage,
2340 jmm_GetPeakMemoryPoolUsage,
2341 jmm_GetThreadAllocatedMemory,
2342 jmm_GetMemoryUsage,
2343 jmm_GetLongAttribute,
2344 jmm_GetBoolAttribute,
2345 jmm_SetBoolAttribute,
2346 jmm_GetLongAttributes,
2347 jmm_FindMonitorDeadlockedThreads,
2348 jmm_GetThreadCpuTime,
2349 jmm_GetVMGlobalNames,
2350 jmm_GetVMGlobals,
2351 jmm_GetInternalThreadTimes,
2352 jmm_ResetStatistic,
2353 jmm_SetPoolSensor,
2354 jmm_SetPoolThreshold,
2355 jmm_GetPoolCollectionUsage,
2356 jmm_GetGCExtAttributeInfo,
2357 jmm_GetLastGCStat,
2358 jmm_GetThreadCpuTimeWithKind,
2359 jmm_GetThreadCpuTimesWithKind,
2360 jmm_DumpHeap0,
2361 jmm_FindDeadlockedThreads,
2362 jmm_SetVMGlobal,
2363 NULL,
2364 jmm_DumpThreads,
2365 jmm_SetGCNotificationEnabled,
2366 jmm_GetDiagnosticCommands,
2367 jmm_GetDiagnosticCommandInfo,
2368 jmm_GetDiagnosticCommandArgumentsInfo,
2369 jmm_ExecuteDiagnosticCommand,
2370 jmm_SetDiagnosticFrameworkNotificationEnabled
2371 };
2372 #endif // INCLUDE_MANAGEMENT
2373
2374 void* Management::get_jmm_interface(int version) {
2375 #if INCLUDE_MANAGEMENT
2376 if (version == JMM_VERSION_1_0) {
2377 return (void*) &jmm_interface;
2378 }
2379 #endif // INCLUDE_MANAGEMENT
2380 return NULL;
2381 }