Tue, 17 Oct 2017 12:58:25 +0800
merge
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 */
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"
59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
61 PerfVariable* Management::_begin_vm_creation_time = NULL;
62 PerfVariable* Management::_end_vm_creation_time = NULL;
63 PerfVariable* Management::_vm_init_done_time = NULL;
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;
78 jmmOptionalSupport Management::_optional_support = {0};
79 TimeStamp Management::_stamp;
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 }
96 #if INCLUDE_MANAGEMENT
98 void Management::init() {
99 EXCEPTION_MARK;
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.
105 _begin_vm_creation_time =
106 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime",
107 PerfData::U_None, CHECK);
109 _end_vm_creation_time =
110 PerfDataManager::create_variable(SUN_RT, "createVmEndTime",
111 PerfData::U_None, CHECK);
113 _vm_init_done_time =
114 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime",
115 PerfData::U_None, CHECK);
117 // Initialize optional support
118 _optional_support.isLowMemoryDetectionSupported = 1;
119 _optional_support.isCompilationTimeMonitoringSupported = 1;
120 _optional_support.isThreadContentionMonitoringSupported = 1;
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 }
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;
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 }
147 void Management::initialize(TRAPS) {
148 // Start the service thread
149 ServiceThread::initialize();
151 if (ManagementServer) {
152 ResourceMark rm(THREAD);
153 HandleMark hm(THREAD);
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);
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 }
177 void Management::get_optional_support(jmmOptionalSupport* support) {
178 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport));
179 }
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 }
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;
198 _begin_vm_creation_time->set_value(begin);
199 _end_vm_creation_time->set_value(begin + duration);
200 PerfMemory::set_accessible(true);
201 }
203 jlong Management::timestamp() {
204 TimeStamp t;
205 t.update();
206 return t.ticks() - _stamp.ticks();
207 }
209 void Management::oops_do(OopClosure* f) {
210 MemoryService::oops_do(f);
211 ThreadService::oops_do(f);
212 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
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 }
291 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) {
292 Handle snapshot_thread(THREAD, snapshot->threadObj());
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 }
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 }
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 }
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 }
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);
338 JavaValue result(T_VOID);
339 JavaCallArguments args(14);
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);
346 // initialize the arguments for the ThreadInfo constructor
347 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
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);
357 return (instanceOop) element();
358 }
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);
368 JavaValue result(T_VOID);
369 JavaCallArguments args(17);
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);
376 // initialize the arguments for the ThreadInfo constructor
377 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL);
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);
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);
392 return (instanceOop) element();
393 }
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);
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 }
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 }
419 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) {
420 if (obj == NULL) {
421 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
422 }
424 oop pool_obj = JNIHandles::resolve(obj);
425 assert(pool_obj->is_instance(), "Should be an instanceOop");
426 instanceHandle ph(THREAD, (instanceOop) pool_obj);
428 return MemoryService::get_memory_pool(ph);
429 }
431 #endif // INCLUDE_MANAGEMENT
433 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) {
434 int num_threads = ids_ah->length();
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 }
448 #if INCLUDE_MANAGEMENT
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 }
461 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) {
462 if (obj == NULL) {
463 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
464 }
466 oop mgr_obj = JNIHandles::resolve(obj);
467 assert(mgr_obj->is_instance(), "Should be an instanceOop");
468 instanceHandle mh(THREAD, (instanceOop) mgr_obj);
470 return MemoryService::get_memory_manager(mh);
471 }
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
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
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);
493 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
494 return NULL;
495 }
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();
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;
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 }
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 }
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 }
540 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL);
541 return JNIHandles::make_local(env, hargs());
542 JVM_END
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);
548 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
549 return NULL;
550 }
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();
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);
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
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);
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 }
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);
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
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);
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 }
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);
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
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);
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
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);
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
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);
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
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 }
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 }
724 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK);
725 assert(mpool != NULL, "MemoryPool should exist");
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 }
742 JVM_END
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 }
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 }
766 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L));
767 assert(pool != NULL, "MemoryPool should exist");
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;
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;
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);
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);
799 default:
800 assert(false, "Unrecognized type");
801 return -1;
802 }
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
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);
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;
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();
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 }
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 }
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 }
858 MemoryUsage usage((heap ? InitialHeapSize : total_init),
859 total_used,
860 total_committed,
861 (heap ? Universe::heap()->max_capacity() : total_max));
863 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
864 return JNIHandles::make_local(env, obj());
865 JVM_END
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
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
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();
911 case JMM_GC_COUNT:
912 return mgr->gc_count();
914 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE:
915 // current implementation only has 1 ext attribute
916 return 1;
918 default:
919 assert(0, "Unrecognized GC attribute");
920 return -1;
921 }
922 }
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 };
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 }
939 _count++;
940 }
942 static jint get_vm_thread_count() {
943 VmThreadCountClosure vmtcc;
944 {
945 MutexLockerEx ml(Threads_lock);
946 Threads::threads_do(&vmtcc);
947 }
949 return vmtcc.count();
950 }
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 }
966 static jlong get_long_attribute(jmmLongAttribute att) {
967 switch (att) {
968 case JMM_CLASS_LOADED_COUNT:
969 return ClassLoadingService::loaded_class_count();
971 case JMM_CLASS_UNLOADED_COUNT:
972 return ClassLoadingService::unloaded_class_count();
974 case JMM_THREAD_TOTAL_COUNT:
975 return ThreadService::get_total_thread_count();
977 case JMM_THREAD_LIVE_COUNT:
978 return ThreadService::get_live_thread_count();
980 case JMM_THREAD_PEAK_COUNT:
981 return ThreadService::get_peak_thread_count();
983 case JMM_THREAD_DAEMON_COUNT:
984 return ThreadService::get_daemon_thread_count();
986 case JMM_JVM_INIT_DONE_TIME_MS:
987 return Management::vm_init_done_time();
989 case JMM_JVM_UPTIME_MS:
990 return Management::ticks_to_ms(os::elapsed_counter());
992 case JMM_COMPILE_TOTAL_TIME_MS:
993 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks());
995 case JMM_OS_PROCESS_ID:
996 return os::current_process_id();
998 // Hotspot-specific counters
999 case JMM_CLASS_LOADED_BYTES:
1000 return ClassLoadingService::loaded_class_bytes();
1002 case JMM_CLASS_UNLOADED_BYTES:
1003 return ClassLoadingService::unloaded_class_bytes();
1005 case JMM_SHARED_CLASS_LOADED_COUNT:
1006 return ClassLoadingService::loaded_shared_class_count();
1008 case JMM_SHARED_CLASS_UNLOADED_COUNT:
1009 return ClassLoadingService::unloaded_shared_class_count();
1012 case JMM_SHARED_CLASS_LOADED_BYTES:
1013 return ClassLoadingService::loaded_shared_class_bytes();
1015 case JMM_SHARED_CLASS_UNLOADED_BYTES:
1016 return ClassLoadingService::unloaded_shared_class_bytes();
1018 case JMM_TOTAL_CLASSLOAD_TIME_MS:
1019 return ClassLoader::classloader_time_ms();
1021 case JMM_VM_GLOBAL_COUNT:
1022 return get_num_flags();
1024 case JMM_SAFEPOINT_COUNT:
1025 return RuntimeService::safepoint_count();
1027 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS:
1028 return RuntimeService::safepoint_sync_time_ms();
1030 case JMM_TOTAL_STOPPED_TIME_MS:
1031 return RuntimeService::safepoint_time_ms();
1033 case JMM_TOTAL_APP_TIME_MS:
1034 return RuntimeService::application_time_ms();
1036 case JMM_VM_THREAD_COUNT:
1037 return get_vm_thread_count();
1039 case JMM_CLASS_INIT_TOTAL_COUNT:
1040 return ClassLoader::class_init_count();
1042 case JMM_CLASS_INIT_TOTAL_TIME_MS:
1043 return ClassLoader::class_init_time_ms();
1045 case JMM_CLASS_VERIFY_TOTAL_TIME_MS:
1046 return ClassLoader::class_verify_time_ms();
1048 case JMM_METHOD_DATA_SIZE_BYTES:
1049 return ClassLoadingService::class_method_data_size();
1051 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES:
1052 return os::physical_memory();
1054 default:
1055 return -1;
1056 }
1057 }
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
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))
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
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) {
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 }
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 }
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 }
1154 if (maxDepth < -1) {
1155 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1156 "Invalid maxDepth", -1);
1157 }
1159 ResourceMark rm(THREAD);
1160 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
1161 typeArrayHandle ids_ah(THREAD, ta);
1163 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray);
1164 objArrayOop oa = objArrayOop(infoArray_obj);
1165 objArrayHandle infoArray_h(THREAD, oa);
1167 // validate the thread id array
1168 validate_thread_id_array(ids_ah, CHECK_0);
1170 // validate the ThreadInfo[] parameters
1171 validate_thread_info_array(infoArray_h, CHECK_0);
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 }
1180 if (JDK_Version::is_gte_jdk16x_version()) {
1181 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1182 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0);
1183 }
1185 // Must use ThreadDumpResult to store the ThreadSnapshot.
1186 // GC may occur after the thread snapshots are taken but before
1187 // this function returns. The threadObj and other oops kept
1188 // in the ThreadSnapshot are marked and adjusted during GC.
1189 ThreadDumpResult dump_result(num_threads);
1191 if (maxDepth == 0) {
1192 // no stack trace dumped - do not need to stop the world
1193 {
1194 MutexLockerEx ml(Threads_lock);
1195 for (int i = 0; i < num_threads; i++) {
1196 jlong tid = ids_ah->long_at(i);
1197 JavaThread* jt = Threads::find_java_thread_from_java_tid(tid);
1198 ThreadSnapshot* ts;
1199 if (jt == NULL) {
1200 // if the thread does not exist or now it is terminated,
1201 // create dummy snapshot
1202 ts = new ThreadSnapshot();
1203 } else {
1204 ts = new ThreadSnapshot(jt);
1205 }
1206 dump_result.add_thread_snapshot(ts);
1207 }
1208 }
1209 } else {
1210 // obtain thread dump with the specific list of threads with stack trace
1211 do_thread_dump(&dump_result,
1212 ids_ah,
1213 num_threads,
1214 maxDepth,
1215 false, /* no locked monitor */
1216 false, /* no locked synchronizers */
1217 CHECK_0);
1218 }
1220 int num_snapshots = dump_result.num_snapshots();
1221 assert(num_snapshots == num_threads, "Must match the number of thread snapshots");
1222 int index = 0;
1223 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) {
1224 // For each thread, create an java/lang/management/ThreadInfo object
1225 // and fill with the thread information
1227 if (ts->threadObj() == NULL) {
1228 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1229 infoArray_h->obj_at_put(index, NULL);
1230 continue;
1231 }
1233 // Create java.lang.management.ThreadInfo object
1234 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0);
1235 infoArray_h->obj_at_put(index, info_obj);
1236 }
1237 return 0;
1238 JVM_END
1240 // Dump thread info for the specified threads.
1241 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo
1242 // for the thread ID specified in the corresponding entry in
1243 // the given array of thread IDs; or NULL if the thread does not exist
1244 // or has terminated.
1245 //
1246 // Input parameter:
1247 // ids - array of thread IDs; NULL indicates all live threads
1248 // locked_monitors - if true, dump locked object monitors
1249 // locked_synchronizers - if true, dump locked JSR-166 synchronizers
1250 //
1251 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers))
1252 ResourceMark rm(THREAD);
1254 if (JDK_Version::is_gte_jdk16x_version()) {
1255 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots
1256 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL);
1257 }
1259 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids));
1260 int num_threads = (ta != NULL ? ta->length() : 0);
1261 typeArrayHandle ids_ah(THREAD, ta);
1263 ThreadDumpResult dump_result(num_threads); // can safepoint
1265 if (ids_ah() != NULL) {
1267 // validate the thread id array
1268 validate_thread_id_array(ids_ah, CHECK_NULL);
1270 // obtain thread dump of a specific list of threads
1271 do_thread_dump(&dump_result,
1272 ids_ah,
1273 num_threads,
1274 -1, /* entire stack */
1275 (locked_monitors ? true : false), /* with locked monitors */
1276 (locked_synchronizers ? true : false), /* with locked synchronizers */
1277 CHECK_NULL);
1278 } else {
1279 // obtain thread dump of all threads
1280 VM_ThreadDump op(&dump_result,
1281 -1, /* entire stack */
1282 (locked_monitors ? true : false), /* with locked monitors */
1283 (locked_synchronizers ? true : false) /* with locked synchronizers */);
1284 VMThread::execute(&op);
1285 }
1287 int num_snapshots = dump_result.num_snapshots();
1289 // create the result ThreadInfo[] object
1290 Klass* k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL);
1291 instanceKlassHandle ik (THREAD, k);
1292 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL);
1293 objArrayHandle result_h(THREAD, r);
1295 int index = 0;
1296 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) {
1297 if (ts->threadObj() == NULL) {
1298 // if the thread does not exist or now it is terminated, set threadinfo to NULL
1299 result_h->obj_at_put(index, NULL);
1300 continue;
1301 }
1303 ThreadStackTrace* stacktrace = ts->get_stack_trace();
1304 assert(stacktrace != NULL, "Must have a stack trace dumped");
1306 // Create Object[] filled with locked monitors
1307 // Create int[] filled with the stack depth where a monitor was locked
1308 int num_frames = stacktrace->get_stack_depth();
1309 int num_locked_monitors = stacktrace->num_jni_locked_monitors();
1311 // Count the total number of locked monitors
1312 for (int i = 0; i < num_frames; i++) {
1313 StackFrameInfo* frame = stacktrace->stack_frame_at(i);
1314 num_locked_monitors += frame->num_locked_monitors();
1315 }
1317 objArrayHandle monitors_array;
1318 typeArrayHandle depths_array;
1319 objArrayHandle synchronizers_array;
1321 if (locked_monitors) {
1322 // Constructs Object[] and int[] to contain the object monitor and the stack depth
1323 // where the thread locked it
1324 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL);
1325 objArrayHandle mh(THREAD, array);
1326 monitors_array = mh;
1328 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL);
1329 typeArrayHandle dh(THREAD, tarray);
1330 depths_array = dh;
1332 int count = 0;
1333 int j = 0;
1334 for (int depth = 0; depth < num_frames; depth++) {
1335 StackFrameInfo* frame = stacktrace->stack_frame_at(depth);
1336 int len = frame->num_locked_monitors();
1337 GrowableArray<oop>* locked_monitors = frame->locked_monitors();
1338 for (j = 0; j < len; j++) {
1339 oop monitor = locked_monitors->at(j);
1340 assert(monitor != NULL && monitor->is_instance(), "must be a Java object");
1341 monitors_array->obj_at_put(count, monitor);
1342 depths_array->int_at_put(count, depth);
1343 count++;
1344 }
1345 }
1347 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors();
1348 for (j = 0; j < jni_locked_monitors->length(); j++) {
1349 oop object = jni_locked_monitors->at(j);
1350 assert(object != NULL && object->is_instance(), "must be a Java object");
1351 monitors_array->obj_at_put(count, object);
1352 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info
1353 depths_array->int_at_put(count, -1);
1354 count++;
1355 }
1356 assert(count == num_locked_monitors, "number of locked monitors doesn't match");
1357 }
1359 if (locked_synchronizers) {
1360 // Create Object[] filled with locked JSR-166 synchronizers
1361 assert(ts->threadObj() != NULL, "Must be a valid JavaThread");
1362 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks();
1363 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
1364 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0);
1366 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL);
1367 objArrayHandle sh(THREAD, array);
1368 synchronizers_array = sh;
1370 for (int k = 0; k < num_locked_synchronizers; k++) {
1371 synchronizers_array->obj_at_put(k, locks->at(k));
1372 }
1373 }
1375 // Create java.lang.management.ThreadInfo object
1376 instanceOop info_obj = Management::create_thread_info_instance(ts,
1377 monitors_array,
1378 depths_array,
1379 synchronizers_array,
1380 CHECK_NULL);
1381 result_h->obj_at_put(index, info_obj);
1382 }
1384 return (jobjectArray) JNIHandles::make_local(env, result_h());
1385 JVM_END
1387 // Returns an array of Class objects.
1388 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env))
1389 ResourceMark rm(THREAD);
1391 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter
1393 int num_classes = lce.num_loaded_classes();
1394 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0);
1395 objArrayHandle classes_ah(THREAD, r);
1397 for (int i = 0; i < num_classes; i++) {
1398 KlassHandle kh = lce.get_klass(i);
1399 oop mirror = kh()->java_mirror();
1400 classes_ah->obj_at_put(i, mirror);
1401 }
1403 return (jobjectArray) JNIHandles::make_local(env, classes_ah());
1404 JVM_END
1406 // Reset statistic. Return true if the requested statistic is reset.
1407 // Otherwise, return false.
1408 //
1409 // Input parameters:
1410 // obj - specify which instance the statistic associated with to be reset
1411 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object.
1412 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID.
1413 // type - the type of statistic to be reset
1414 //
1415 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type))
1416 ResourceMark rm(THREAD);
1418 switch (type) {
1419 case JMM_STAT_PEAK_THREAD_COUNT:
1420 ThreadService::reset_peak_thread_count();
1421 return true;
1423 case JMM_STAT_THREAD_CONTENTION_COUNT:
1424 case JMM_STAT_THREAD_CONTENTION_TIME: {
1425 jlong tid = obj.j;
1426 if (tid < 0) {
1427 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE);
1428 }
1430 // Look for the JavaThread of this given tid
1431 MutexLockerEx ml(Threads_lock);
1432 if (tid == 0) {
1433 // reset contention statistics for all threads if tid == 0
1434 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) {
1435 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1436 ThreadService::reset_contention_count_stat(java_thread);
1437 } else {
1438 ThreadService::reset_contention_time_stat(java_thread);
1439 }
1440 }
1441 } else {
1442 // reset contention statistics for a given thread
1443 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(tid);
1444 if (java_thread == NULL) {
1445 return false;
1446 }
1448 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) {
1449 ThreadService::reset_contention_count_stat(java_thread);
1450 } else {
1451 ThreadService::reset_contention_time_stat(java_thread);
1452 }
1453 }
1454 return true;
1455 break;
1456 }
1457 case JMM_STAT_PEAK_POOL_USAGE: {
1458 jobject o = obj.l;
1459 if (o == NULL) {
1460 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1461 }
1463 oop pool_obj = JNIHandles::resolve(o);
1464 assert(pool_obj->is_instance(), "Should be an instanceOop");
1465 instanceHandle ph(THREAD, (instanceOop) pool_obj);
1467 MemoryPool* pool = MemoryService::get_memory_pool(ph);
1468 if (pool != NULL) {
1469 pool->reset_peak_memory_usage();
1470 return true;
1471 }
1472 break;
1473 }
1474 case JMM_STAT_GC_STAT: {
1475 jobject o = obj.l;
1476 if (o == NULL) {
1477 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
1478 }
1480 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0);
1481 if (mgr != NULL) {
1482 mgr->reset_gc_stat();
1483 return true;
1484 }
1485 break;
1486 }
1487 default:
1488 assert(0, "Unknown Statistic Type");
1489 }
1490 return false;
1491 JVM_END
1493 // Returns the fast estimate of CPU time consumed by
1494 // a given thread (in nanoseconds).
1495 // If thread_id == 0, return CPU time for the current thread.
1496 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id))
1497 if (!os::is_thread_cpu_time_supported()) {
1498 return -1;
1499 }
1501 if (thread_id < 0) {
1502 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1503 "Invalid thread ID", -1);
1504 }
1506 JavaThread* java_thread = NULL;
1507 if (thread_id == 0) {
1508 // current thread
1509 return os::current_thread_cpu_time();
1510 } else {
1511 MutexLockerEx ml(Threads_lock);
1512 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
1513 if (java_thread != NULL) {
1514 return os::thread_cpu_time((Thread*) java_thread);
1515 }
1516 }
1517 return -1;
1518 JVM_END
1520 // Returns a String array of all VM global flag names
1521 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env))
1522 // last flag entry is always NULL, so subtract 1
1523 int nFlags = (int) Flag::numFlags - 1;
1524 // allocate a temp array
1525 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1526 nFlags, CHECK_0);
1527 objArrayHandle flags_ah(THREAD, r);
1528 int num_entries = 0;
1529 for (int i = 0; i < nFlags; i++) {
1530 Flag* flag = &Flag::flags[i];
1531 // Exclude notproduct and develop flags in product builds.
1532 if (flag->is_constant_in_binary()) {
1533 continue;
1534 }
1535 // Exclude the locked (experimental, diagnostic) flags
1536 if (flag->is_unlocked() || flag->is_unlocker()) {
1537 Handle s = java_lang_String::create_from_str(flag->_name, CHECK_0);
1538 flags_ah->obj_at_put(num_entries, s());
1539 num_entries++;
1540 }
1541 }
1543 if (num_entries < nFlags) {
1544 // Return array of right length
1545 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0);
1546 for(int i = 0; i < num_entries; i++) {
1547 res->obj_at_put(i, flags_ah->obj_at(i));
1548 }
1549 return (jobjectArray)JNIHandles::make_local(env, res);
1550 }
1552 return (jobjectArray)JNIHandles::make_local(env, flags_ah());
1553 JVM_END
1555 // Utility function used by jmm_GetVMGlobals. Returns false if flag type
1556 // can't be determined, true otherwise. If false is returned, then *global
1557 // will be incomplete and invalid.
1558 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) {
1559 Handle flag_name;
1560 if (name() == NULL) {
1561 flag_name = java_lang_String::create_from_str(flag->_name, CHECK_false);
1562 } else {
1563 flag_name = name;
1564 }
1565 global->name = (jstring)JNIHandles::make_local(env, flag_name());
1567 if (flag->is_bool()) {
1568 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE;
1569 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN;
1570 } else if (flag->is_intx()) {
1571 global->value.j = (jlong)flag->get_intx();
1572 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1573 } else if (flag->is_uintx()) {
1574 global->value.j = (jlong)flag->get_uintx();
1575 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1576 } else if (flag->is_uint64_t()) {
1577 global->value.j = (jlong)flag->get_uint64_t();
1578 global->type = JMM_VMGLOBAL_TYPE_JLONG;
1579 } else if (flag->is_ccstr()) {
1580 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false);
1581 global->value.l = (jobject)JNIHandles::make_local(env, str());
1582 global->type = JMM_VMGLOBAL_TYPE_JSTRING;
1583 } else {
1584 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN;
1585 return false;
1586 }
1588 global->writeable = flag->is_writeable();
1589 global->external = flag->is_external();
1590 switch (flag->get_origin()) {
1591 case Flag::DEFAULT:
1592 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT;
1593 break;
1594 case Flag::COMMAND_LINE:
1595 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE;
1596 break;
1597 case Flag::ENVIRON_VAR:
1598 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR;
1599 break;
1600 case Flag::CONFIG_FILE:
1601 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE;
1602 break;
1603 case Flag::MANAGEMENT:
1604 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT;
1605 break;
1606 case Flag::ERGONOMIC:
1607 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC;
1608 break;
1609 default:
1610 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER;
1611 }
1613 return true;
1614 }
1616 // Fill globals array of count length with jmmVMGlobal entries
1617 // specified by names. If names == NULL, fill globals array
1618 // with all Flags. Return value is number of entries
1619 // created in globals.
1620 // If a Flag with a given name in an array element does not
1621 // exist, globals[i].name will be set to NULL.
1622 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env,
1623 jobjectArray names,
1624 jmmVMGlobal *globals,
1625 jint count))
1628 if (globals == NULL) {
1629 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1630 }
1632 ResourceMark rm(THREAD);
1634 if (names != NULL) {
1635 // return the requested globals
1636 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names));
1637 objArrayHandle names_ah(THREAD, ta);
1638 // Make sure we have a String array
1639 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1640 if (element_klass != SystemDictionary::String_klass()) {
1641 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1642 "Array element type is not String class", 0);
1643 }
1645 int names_length = names_ah->length();
1646 int num_entries = 0;
1647 for (int i = 0; i < names_length && i < count; i++) {
1648 oop s = names_ah->obj_at(i);
1649 if (s == NULL) {
1650 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1651 }
1653 Handle sh(THREAD, s);
1654 char* str = java_lang_String::as_utf8_string(s);
1655 Flag* flag = Flag::find_flag(str, strlen(str));
1656 if (flag != NULL &&
1657 add_global_entry(env, sh, &globals[i], flag, THREAD)) {
1658 num_entries++;
1659 } else {
1660 globals[i].name = NULL;
1661 }
1662 }
1663 return num_entries;
1664 } else {
1665 // return all globals if names == NULL
1667 // last flag entry is always NULL, so subtract 1
1668 int nFlags = (int) Flag::numFlags - 1;
1669 Handle null_h;
1670 int num_entries = 0;
1671 for (int i = 0; i < nFlags && num_entries < count; i++) {
1672 Flag* flag = &Flag::flags[i];
1673 // Exclude notproduct and develop flags in product builds.
1674 if (flag->is_constant_in_binary()) {
1675 continue;
1676 }
1677 // Exclude the locked (diagnostic, experimental) flags
1678 if ((flag->is_unlocked() || flag->is_unlocker()) &&
1679 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) {
1680 num_entries++;
1681 }
1682 }
1683 return num_entries;
1684 }
1685 JVM_END
1687 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value))
1688 ResourceMark rm(THREAD);
1690 oop fn = JNIHandles::resolve_external_guard(flag_name);
1691 if (fn == NULL) {
1692 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
1693 "The flag name cannot be null.");
1694 }
1695 char* name = java_lang_String::as_utf8_string(fn);
1696 Flag* flag = Flag::find_flag(name, strlen(name));
1697 if (flag == NULL) {
1698 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1699 "Flag does not exist.");
1700 }
1701 if (!flag->is_writeable()) {
1702 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1703 "This flag is not writeable.");
1704 }
1706 bool succeed = false;
1707 if (flag->is_bool()) {
1708 bool bvalue = (new_value.z == JNI_TRUE ? true : false);
1709 succeed = CommandLineFlags::boolAtPut(name, &bvalue, Flag::MANAGEMENT);
1710 } else if (flag->is_intx()) {
1711 intx ivalue = (intx)new_value.j;
1712 succeed = CommandLineFlags::intxAtPut(name, &ivalue, Flag::MANAGEMENT);
1713 } else if (flag->is_uintx()) {
1714 uintx uvalue = (uintx)new_value.j;
1716 if (strncmp(name, "MaxHeapFreeRatio", 17) == 0) {
1717 FormatBuffer<80> err_msg("%s", "");
1718 if (!Arguments::verify_MaxHeapFreeRatio(err_msg, uvalue)) {
1719 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1720 }
1721 } else if (strncmp(name, "MinHeapFreeRatio", 17) == 0) {
1722 FormatBuffer<80> err_msg("%s", "");
1723 if (!Arguments::verify_MinHeapFreeRatio(err_msg, uvalue)) {
1724 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), err_msg.buffer());
1725 }
1726 }
1727 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, Flag::MANAGEMENT);
1728 } else if (flag->is_uint64_t()) {
1729 uint64_t uvalue = (uint64_t)new_value.j;
1730 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, Flag::MANAGEMENT);
1731 } else if (flag->is_ccstr()) {
1732 oop str = JNIHandles::resolve_external_guard(new_value.l);
1733 if (str == NULL) {
1734 THROW(vmSymbols::java_lang_NullPointerException());
1735 }
1736 ccstr svalue = java_lang_String::as_utf8_string(str);
1737 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, Flag::MANAGEMENT);
1738 if (succeed) {
1739 FREE_C_HEAP_ARRAY(char, svalue, mtInternal);
1740 }
1741 }
1742 assert(succeed, "Setting flag should succeed");
1743 JVM_END
1745 class ThreadTimesClosure: public ThreadClosure {
1746 private:
1747 objArrayHandle _names_strings;
1748 char **_names_chars;
1749 typeArrayHandle _times;
1750 int _names_len;
1751 int _times_len;
1752 int _count;
1754 public:
1755 ThreadTimesClosure(objArrayHandle names, typeArrayHandle times);
1756 ~ThreadTimesClosure();
1757 virtual void do_thread(Thread* thread);
1758 void do_unlocked();
1759 int count() { return _count; }
1760 };
1762 ThreadTimesClosure::ThreadTimesClosure(objArrayHandle names,
1763 typeArrayHandle times) {
1764 assert(names() != NULL, "names was NULL");
1765 assert(times() != NULL, "times was NULL");
1766 _names_strings = names;
1767 _names_len = names->length();
1768 _names_chars = NEW_C_HEAP_ARRAY(char*, _names_len, mtInternal);
1769 _times = times;
1770 _times_len = times->length();
1771 _count = 0;
1772 }
1774 //
1775 // Called with Threads_lock held
1776 //
1777 void ThreadTimesClosure::do_thread(Thread* thread) {
1778 assert(thread != NULL, "thread was NULL");
1780 // exclude externally visible JavaThreads
1781 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) {
1782 return;
1783 }
1785 if (_count >= _names_len || _count >= _times_len) {
1786 // skip if the result array is not big enough
1787 return;
1788 }
1790 EXCEPTION_MARK;
1791 ResourceMark rm(THREAD); // thread->name() uses ResourceArea
1793 assert(thread->name() != NULL, "All threads should have a name");
1794 _names_chars[_count] = strdup(thread->name());
1795 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ?
1796 os::thread_cpu_time(thread) : -1);
1797 _count++;
1798 }
1800 // Called without Threads_lock, we can allocate String objects.
1801 void ThreadTimesClosure::do_unlocked() {
1803 EXCEPTION_MARK;
1804 for (int i = 0; i < _count; i++) {
1805 Handle s = java_lang_String::create_from_str(_names_chars[i], CHECK);
1806 _names_strings->obj_at_put(i, s());
1807 }
1808 }
1810 ThreadTimesClosure::~ThreadTimesClosure() {
1811 for (int i = 0; i < _count; i++) {
1812 free(_names_chars[i]);
1813 }
1814 FREE_C_HEAP_ARRAY(char *, _names_chars, mtInternal);
1815 }
1817 // Fills names with VM internal thread names and times with the corresponding
1818 // CPU times. If names or times is NULL, a NullPointerException is thrown.
1819 // If the element type of names is not String, an IllegalArgumentException is
1820 // thrown.
1821 // If an array is not large enough to hold all the entries, only the entries
1822 // that fit will be returned. Return value is the number of VM internal
1823 // threads entries.
1824 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env,
1825 jobjectArray names,
1826 jlongArray times))
1827 if (names == NULL || times == NULL) {
1828 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1829 }
1830 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names));
1831 objArrayHandle names_ah(THREAD, na);
1833 // Make sure we have a String array
1834 Klass* element_klass = ObjArrayKlass::cast(names_ah->klass())->element_klass();
1835 if (element_klass != SystemDictionary::String_klass()) {
1836 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1837 "Array element type is not String class", 0);
1838 }
1840 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times));
1841 typeArrayHandle times_ah(THREAD, ta);
1843 ThreadTimesClosure ttc(names_ah, times_ah);
1844 {
1845 MutexLockerEx ml(Threads_lock);
1846 Threads::threads_do(&ttc);
1847 }
1848 ttc.do_unlocked();
1849 return ttc.count();
1850 JVM_END
1852 static Handle find_deadlocks(bool object_monitors_only, TRAPS) {
1853 ResourceMark rm(THREAD);
1855 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */);
1856 VMThread::execute(&op);
1858 DeadlockCycle* deadlocks = op.result();
1859 if (deadlocks == NULL) {
1860 // no deadlock found and return
1861 return Handle();
1862 }
1864 int num_threads = 0;
1865 DeadlockCycle* cycle;
1866 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1867 num_threads += cycle->num_threads();
1868 }
1870 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH);
1871 objArrayHandle threads_ah(THREAD, r);
1873 int index = 0;
1874 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) {
1875 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads();
1876 int len = deadlock_threads->length();
1877 for (int i = 0; i < len; i++) {
1878 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj());
1879 index++;
1880 }
1881 }
1882 return threads_ah;
1883 }
1885 // Finds cycles of threads that are deadlocked involved in object monitors
1886 // and JSR-166 synchronizers.
1887 // Returns an array of Thread objects which are in deadlock, if any.
1888 // Otherwise, returns NULL.
1889 //
1890 // Input parameter:
1891 // object_monitors_only - if true, only check object monitors
1892 //
1893 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only))
1894 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0);
1895 return (jobjectArray) JNIHandles::make_local(env, result());
1896 JVM_END
1898 // Finds cycles of threads that are deadlocked on monitor locks
1899 // Returns an array of Thread objects which are in deadlock, if any.
1900 // Otherwise, returns NULL.
1901 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env))
1902 Handle result = find_deadlocks(true, CHECK_0);
1903 return (jobjectArray) JNIHandles::make_local(env, result());
1904 JVM_END
1906 // Gets the information about GC extension attributes including
1907 // the name of the attribute, its type, and a short description.
1908 //
1909 // Input parameters:
1910 // mgr - GC memory manager
1911 // info - caller allocated array of jmmExtAttributeInfo
1912 // count - number of elements of the info array
1913 //
1914 // Returns the number of GC extension attributes filled in the info array; or
1915 // -1 if info is not big enough
1916 //
1917 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count))
1918 // All GC memory managers have 1 attribute (number of GC threads)
1919 if (count == 0) {
1920 return 0;
1921 }
1923 if (info == NULL) {
1924 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1925 }
1927 info[0].name = "GcThreadCount";
1928 info[0].type = 'I';
1929 info[0].description = "Number of GC threads";
1930 return 1;
1931 JVM_END
1933 // verify the given array is an array of java/lang/management/MemoryUsage objects
1934 // of a given length and return the objArrayOop
1935 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) {
1936 if (array == NULL) {
1937 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
1938 }
1940 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array));
1941 objArrayHandle array_h(THREAD, oa);
1943 // array must be of the given length
1944 if (length != array_h->length()) {
1945 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1946 "The length of the given MemoryUsage array does not match the number of memory pools.", 0);
1947 }
1949 // check if the element of array is of type MemoryUsage class
1950 Klass* usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0);
1951 Klass* element_klass = ObjArrayKlass::cast(array_h->klass())->element_klass();
1952 if (element_klass != usage_klass) {
1953 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
1954 "The element type is not MemoryUsage class", 0);
1955 }
1957 return array_h();
1958 }
1960 // Gets the statistics of the last GC of a given GC memory manager.
1961 // Input parameters:
1962 // obj - GarbageCollectorMXBean object
1963 // gc_stat - caller allocated jmmGCStat where:
1964 // a. before_gc_usage - array of MemoryUsage objects
1965 // b. after_gc_usage - array of MemoryUsage objects
1966 // c. gc_ext_attributes_values_size is set to the
1967 // gc_ext_attribute_values array allocated
1968 // d. gc_ext_attribute_values is a caller allocated array of jvalue.
1969 //
1970 // On return,
1971 // gc_index == 0 indicates no GC statistics available
1972 //
1973 // before_gc_usage and after_gc_usage - filled with per memory pool
1974 // before and after GC usage in the same order as the memory pools
1975 // returned by GetMemoryPools for a given GC memory manager.
1976 // num_gc_ext_attributes indicates the number of elements in
1977 // the gc_ext_attribute_values array is filled; or
1978 // -1 if the gc_ext_attributes_values array is not big enough
1979 //
1980 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat))
1981 ResourceMark rm(THREAD);
1983 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) {
1984 THROW(vmSymbols::java_lang_NullPointerException());
1985 }
1987 // Get the GCMemoryManager
1988 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
1990 // Make a copy of the last GC statistics
1991 // GC may occur while constructing the last GC information
1992 int num_pools = MemoryService::num_memory_pools();
1993 GCStatInfo stat(num_pools);
1994 if (mgr->get_last_gc_stat(&stat) == 0) {
1995 gc_stat->gc_index = 0;
1996 return;
1997 }
1999 gc_stat->gc_index = stat.gc_index();
2000 gc_stat->start_time = Management::ticks_to_ms(stat.start_time());
2001 gc_stat->end_time = Management::ticks_to_ms(stat.end_time());
2003 // Current implementation does not have GC extension attributes
2004 gc_stat->num_gc_ext_attributes = 0;
2006 // Fill the arrays of MemoryUsage objects with before and after GC
2007 // per pool memory usage
2008 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc,
2009 num_pools,
2010 CHECK);
2011 objArrayHandle usage_before_gc_ah(THREAD, bu);
2013 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc,
2014 num_pools,
2015 CHECK);
2016 objArrayHandle usage_after_gc_ah(THREAD, au);
2018 for (int i = 0; i < num_pools; i++) {
2019 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat.before_gc_usage_for_pool(i), CHECK);
2020 Handle after_usage;
2022 MemoryUsage u = stat.after_gc_usage_for_pool(i);
2023 if (u.max_size() == 0 && u.used() > 0) {
2024 // If max size == 0, this pool is a survivor space.
2025 // Set max size = -1 since the pools will be swapped after GC.
2026 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1);
2027 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK);
2028 } else {
2029 after_usage = MemoryService::create_MemoryUsage_obj(stat.after_gc_usage_for_pool(i), CHECK);
2030 }
2031 usage_before_gc_ah->obj_at_put(i, before_usage());
2032 usage_after_gc_ah->obj_at_put(i, after_usage());
2033 }
2035 if (gc_stat->gc_ext_attribute_values_size > 0) {
2036 // Current implementation only has 1 attribute (number of GC threads)
2037 // The type is 'I'
2038 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads();
2039 }
2040 JVM_END
2042 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled))
2043 ResourceMark rm(THREAD);
2044 // Get the GCMemoryManager
2045 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK);
2046 mgr->set_notification_enabled(enabled?true:false);
2047 JVM_END
2049 // Dump heap - Returns 0 if succeeds.
2050 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live))
2051 #if INCLUDE_SERVICES
2052 ResourceMark rm(THREAD);
2053 oop on = JNIHandles::resolve_external_guard(outputfile);
2054 if (on == NULL) {
2055 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2056 "Output file name cannot be null.", -1);
2057 }
2058 char* name = java_lang_String::as_platform_dependent_str(on, CHECK_(-1));
2059 if (name == NULL) {
2060 THROW_MSG_(vmSymbols::java_lang_NullPointerException(),
2061 "Output file name cannot be null.", -1);
2062 }
2063 HeapDumper dumper(live ? true : false);
2064 if (dumper.dump(name) != 0) {
2065 const char* errmsg = dumper.error_as_C_string();
2066 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1);
2067 }
2068 return 0;
2069 #else // INCLUDE_SERVICES
2070 return -1;
2071 #endif // INCLUDE_SERVICES
2072 JVM_END
2074 JVM_ENTRY(jobjectArray, jmm_GetDiagnosticCommands(JNIEnv *env))
2075 ResourceMark rm(THREAD);
2076 GrowableArray<const char *>* dcmd_list = DCmdFactory::DCmd_list(DCmd_Source_MBean);
2077 objArrayOop cmd_array_oop = oopFactory::new_objArray(SystemDictionary::String_klass(),
2078 dcmd_list->length(), CHECK_NULL);
2079 objArrayHandle cmd_array(THREAD, cmd_array_oop);
2080 for (int i = 0; i < dcmd_list->length(); i++) {
2081 oop cmd_name = java_lang_String::create_oop_from_str(dcmd_list->at(i), CHECK_NULL);
2082 cmd_array->obj_at_put(i, cmd_name);
2083 }
2084 return (jobjectArray) JNIHandles::make_local(env, cmd_array());
2085 JVM_END
2087 JVM_ENTRY(void, jmm_GetDiagnosticCommandInfo(JNIEnv *env, jobjectArray cmds,
2088 dcmdInfo* infoArray))
2089 if (cmds == NULL || infoArray == NULL) {
2090 THROW(vmSymbols::java_lang_NullPointerException());
2091 }
2093 ResourceMark rm(THREAD);
2095 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(cmds));
2096 objArrayHandle cmds_ah(THREAD, ca);
2098 // Make sure we have a String array
2099 Klass* element_klass = ObjArrayKlass::cast(cmds_ah->klass())->element_klass();
2100 if (element_klass != SystemDictionary::String_klass()) {
2101 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2102 "Array element type is not String class");
2103 }
2105 GrowableArray<DCmdInfo *>* info_list = DCmdFactory::DCmdInfo_list(DCmd_Source_MBean);
2107 int num_cmds = cmds_ah->length();
2108 for (int i = 0; i < num_cmds; i++) {
2109 oop cmd = cmds_ah->obj_at(i);
2110 if (cmd == NULL) {
2111 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2112 "Command name cannot be null.");
2113 }
2114 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2115 if (cmd_name == NULL) {
2116 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2117 "Command name cannot be null.");
2118 }
2119 int pos = info_list->find((void*)cmd_name,DCmdInfo::by_name);
2120 if (pos == -1) {
2121 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2122 "Unknown diagnostic command");
2123 }
2124 DCmdInfo* info = info_list->at(pos);
2125 infoArray[i].name = info->name();
2126 infoArray[i].description = info->description();
2127 infoArray[i].impact = info->impact();
2128 JavaPermission p = info->permission();
2129 infoArray[i].permission_class = p._class;
2130 infoArray[i].permission_name = p._name;
2131 infoArray[i].permission_action = p._action;
2132 infoArray[i].num_arguments = info->num_arguments();
2133 infoArray[i].enabled = info->is_enabled();
2134 }
2135 JVM_END
2137 JVM_ENTRY(void, jmm_GetDiagnosticCommandArgumentsInfo(JNIEnv *env,
2138 jstring command, dcmdArgInfo* infoArray))
2139 ResourceMark rm(THREAD);
2140 oop cmd = JNIHandles::resolve_external_guard(command);
2141 if (cmd == NULL) {
2142 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2143 "Command line cannot be null.");
2144 }
2145 char* cmd_name = java_lang_String::as_utf8_string(cmd);
2146 if (cmd_name == NULL) {
2147 THROW_MSG(vmSymbols::java_lang_NullPointerException(),
2148 "Command line content cannot be null.");
2149 }
2150 DCmd* dcmd = NULL;
2151 DCmdFactory*factory = DCmdFactory::factory(DCmd_Source_MBean, cmd_name,
2152 strlen(cmd_name));
2153 if (factory != NULL) {
2154 dcmd = factory->create_resource_instance(NULL);
2155 }
2156 if (dcmd == NULL) {
2157 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2158 "Unknown diagnostic command");
2159 }
2160 DCmdMark mark(dcmd);
2161 GrowableArray<DCmdArgumentInfo*>* array = dcmd->argument_info_array();
2162 if (array->length() == 0) {
2163 return;
2164 }
2165 for (int i = 0; i < array->length(); i++) {
2166 infoArray[i].name = array->at(i)->name();
2167 infoArray[i].description = array->at(i)->description();
2168 infoArray[i].type = array->at(i)->type();
2169 infoArray[i].default_string = array->at(i)->default_string();
2170 infoArray[i].mandatory = array->at(i)->is_mandatory();
2171 infoArray[i].option = array->at(i)->is_option();
2172 infoArray[i].multiple = array->at(i)->is_multiple();
2173 infoArray[i].position = array->at(i)->position();
2174 }
2175 return;
2176 JVM_END
2178 JVM_ENTRY(jstring, jmm_ExecuteDiagnosticCommand(JNIEnv *env, jstring commandline))
2179 ResourceMark rm(THREAD);
2180 oop cmd = JNIHandles::resolve_external_guard(commandline);
2181 if (cmd == NULL) {
2182 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2183 "Command line cannot be null.");
2184 }
2185 char* cmdline = java_lang_String::as_utf8_string(cmd);
2186 if (cmdline == NULL) {
2187 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
2188 "Command line content cannot be null.");
2189 }
2190 bufferedStream output;
2191 DCmd::parse_and_execute(DCmd_Source_MBean, &output, cmdline, ' ', CHECK_NULL);
2192 oop result = java_lang_String::create_oop_from_str(output.as_string(), CHECK_NULL);
2193 return (jstring) JNIHandles::make_local(env, result);
2194 JVM_END
2196 JVM_ENTRY(void, jmm_SetDiagnosticFrameworkNotificationEnabled(JNIEnv *env, jboolean enabled))
2197 DCmdFactory::set_jmx_notification_enabled(enabled?true:false);
2198 JVM_END
2200 jlong Management::ticks_to_ms(jlong ticks) {
2201 assert(os::elapsed_frequency() > 0, "Must be non-zero");
2202 return (jlong)(((double)ticks / (double)os::elapsed_frequency())
2203 * (double)1000.0);
2204 }
2205 #endif // INCLUDE_MANAGEMENT
2207 // Gets an array containing the amount of memory allocated on the Java
2208 // heap for a set of threads (in bytes). Each element of the array is
2209 // the amount of memory allocated for the thread ID specified in the
2210 // corresponding entry in the given array of thread IDs; or -1 if the
2211 // thread does not exist or has terminated.
2212 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids,
2213 jlongArray sizeArray))
2214 // Check if threads is null
2215 if (ids == NULL || sizeArray == NULL) {
2216 THROW(vmSymbols::java_lang_NullPointerException());
2217 }
2219 ResourceMark rm(THREAD);
2220 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2221 typeArrayHandle ids_ah(THREAD, ta);
2223 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray));
2224 typeArrayHandle sizeArray_h(THREAD, sa);
2226 // validate the thread id array
2227 validate_thread_id_array(ids_ah, CHECK);
2229 // sizeArray must be of the same length as the given array of thread IDs
2230 int num_threads = ids_ah->length();
2231 if (num_threads != sizeArray_h->length()) {
2232 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2233 "The length of the given long array does not match the length of "
2234 "the given array of thread IDs");
2235 }
2237 MutexLockerEx ml(Threads_lock);
2238 for (int i = 0; i < num_threads; i++) {
2239 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2240 if (java_thread != NULL) {
2241 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes());
2242 }
2243 }
2244 JVM_END
2246 // Returns the CPU time consumed by a given thread (in nanoseconds).
2247 // If thread_id == 0, CPU time for the current thread is returned.
2248 // If user_sys_cpu_time = true, user level and system CPU time of
2249 // a given thread is returned; otherwise, only user level CPU time
2250 // is returned.
2251 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time))
2252 if (!os::is_thread_cpu_time_supported()) {
2253 return -1;
2254 }
2256 if (thread_id < 0) {
2257 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
2258 "Invalid thread ID", -1);
2259 }
2261 JavaThread* java_thread = NULL;
2262 if (thread_id == 0) {
2263 // current thread
2264 return os::current_thread_cpu_time(user_sys_cpu_time != 0);
2265 } else {
2266 MutexLockerEx ml(Threads_lock);
2267 java_thread = Threads::find_java_thread_from_java_tid(thread_id);
2268 if (java_thread != NULL) {
2269 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0);
2270 }
2271 }
2272 return -1;
2273 JVM_END
2275 // Gets an array containing the CPU times consumed by a set of threads
2276 // (in nanoseconds). Each element of the array is the CPU time for the
2277 // thread ID specified in the corresponding entry in the given array
2278 // of thread IDs; or -1 if the thread does not exist or has terminated.
2279 // If user_sys_cpu_time = true, the sum of user level and system CPU time
2280 // for the given thread is returned; otherwise, only user level CPU time
2281 // is returned.
2282 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids,
2283 jlongArray timeArray,
2284 jboolean user_sys_cpu_time))
2285 // Check if threads is null
2286 if (ids == NULL || timeArray == NULL) {
2287 THROW(vmSymbols::java_lang_NullPointerException());
2288 }
2290 ResourceMark rm(THREAD);
2291 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids));
2292 typeArrayHandle ids_ah(THREAD, ta);
2294 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray));
2295 typeArrayHandle timeArray_h(THREAD, tia);
2297 // validate the thread id array
2298 validate_thread_id_array(ids_ah, CHECK);
2300 // timeArray must be of the same length as the given array of thread IDs
2301 int num_threads = ids_ah->length();
2302 if (num_threads != timeArray_h->length()) {
2303 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
2304 "The length of the given long array does not match the length of "
2305 "the given array of thread IDs");
2306 }
2308 MutexLockerEx ml(Threads_lock);
2309 for (int i = 0; i < num_threads; i++) {
2310 JavaThread* java_thread = Threads::find_java_thread_from_java_tid(ids_ah->long_at(i));
2311 if (java_thread != NULL) {
2312 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread,
2313 user_sys_cpu_time != 0));
2314 }
2315 }
2316 JVM_END
2320 #if INCLUDE_MANAGEMENT
2321 const struct jmmInterface_1_ jmm_interface = {
2322 NULL,
2323 NULL,
2324 jmm_GetVersion,
2325 jmm_GetOptionalSupport,
2326 jmm_GetInputArguments,
2327 jmm_GetThreadInfo,
2328 jmm_GetInputArgumentArray,
2329 jmm_GetMemoryPools,
2330 jmm_GetMemoryManagers,
2331 jmm_GetMemoryPoolUsage,
2332 jmm_GetPeakMemoryPoolUsage,
2333 jmm_GetThreadAllocatedMemory,
2334 jmm_GetMemoryUsage,
2335 jmm_GetLongAttribute,
2336 jmm_GetBoolAttribute,
2337 jmm_SetBoolAttribute,
2338 jmm_GetLongAttributes,
2339 jmm_FindMonitorDeadlockedThreads,
2340 jmm_GetThreadCpuTime,
2341 jmm_GetVMGlobalNames,
2342 jmm_GetVMGlobals,
2343 jmm_GetInternalThreadTimes,
2344 jmm_ResetStatistic,
2345 jmm_SetPoolSensor,
2346 jmm_SetPoolThreshold,
2347 jmm_GetPoolCollectionUsage,
2348 jmm_GetGCExtAttributeInfo,
2349 jmm_GetLastGCStat,
2350 jmm_GetThreadCpuTimeWithKind,
2351 jmm_GetThreadCpuTimesWithKind,
2352 jmm_DumpHeap0,
2353 jmm_FindDeadlockedThreads,
2354 jmm_SetVMGlobal,
2355 NULL,
2356 jmm_DumpThreads,
2357 jmm_SetGCNotificationEnabled,
2358 jmm_GetDiagnosticCommands,
2359 jmm_GetDiagnosticCommandInfo,
2360 jmm_GetDiagnosticCommandArgumentsInfo,
2361 jmm_ExecuteDiagnosticCommand,
2362 jmm_SetDiagnosticFrameworkNotificationEnabled
2363 };
2364 #endif // INCLUDE_MANAGEMENT
2366 void* Management::get_jmm_interface(int version) {
2367 #if INCLUDE_MANAGEMENT
2368 if (version == JMM_VERSION_1_0) {
2369 return (void*) &jmm_interface;
2370 }
2371 #endif // INCLUDE_MANAGEMENT
2372 return NULL;
2373 }