Mercurial > hg > graal-compiler
annotate src/share/vm/services/management.cpp @ 878:abe076e3636f
6864003: Modify JVM_FindClassFromBootLoader to return null if class not found
Summary: JVM_FindClassFromBootLoader returns null if class not found
Reviewed-by: acorn, alanb, dholmes
author | mchung |
---|---|
date | Mon, 27 Jul 2009 09:06:22 -0700 |
parents | 0fbdb4381b99 |
children | 473cce303f13 |
rev | line source |
---|---|
0 | 1 /* |
579 | 2 * Copyright 2003-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_management.cpp.incl" | |
27 | |
28 PerfVariable* Management::_begin_vm_creation_time = NULL; | |
29 PerfVariable* Management::_end_vm_creation_time = NULL; | |
30 PerfVariable* Management::_vm_init_done_time = NULL; | |
31 | |
32 klassOop Management::_sensor_klass = NULL; | |
33 klassOop Management::_threadInfo_klass = NULL; | |
34 klassOop Management::_memoryUsage_klass = NULL; | |
35 klassOop Management::_memoryPoolMXBean_klass = NULL; | |
36 klassOop Management::_memoryManagerMXBean_klass = NULL; | |
37 klassOop Management::_garbageCollectorMXBean_klass = NULL; | |
38 klassOop Management::_managementFactory_klass = NULL; | |
39 | |
40 jmmOptionalSupport Management::_optional_support = {0}; | |
41 TimeStamp Management::_stamp; | |
42 | |
43 void management_init() { | |
44 Management::init(); | |
45 ThreadService::init(); | |
46 RuntimeService::init(); | |
47 ClassLoadingService::init(); | |
48 } | |
49 | |
50 void Management::init() { | |
51 EXCEPTION_MARK; | |
52 | |
53 // These counters are for java.lang.management API support. | |
54 // They are created even if -XX:-UsePerfData is set and in | |
55 // that case, they will be allocated on C heap. | |
56 | |
57 _begin_vm_creation_time = | |
58 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", | |
59 PerfData::U_None, CHECK); | |
60 | |
61 _end_vm_creation_time = | |
62 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", | |
63 PerfData::U_None, CHECK); | |
64 | |
65 _vm_init_done_time = | |
66 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", | |
67 PerfData::U_None, CHECK); | |
68 | |
69 // Initialize optional support | |
70 _optional_support.isLowMemoryDetectionSupported = 1; | |
71 _optional_support.isCompilationTimeMonitoringSupported = 1; | |
72 _optional_support.isThreadContentionMonitoringSupported = 1; | |
73 | |
74 if (os::is_thread_cpu_time_supported()) { | |
75 _optional_support.isCurrentThreadCpuTimeSupported = 1; | |
76 _optional_support.isOtherThreadCpuTimeSupported = 1; | |
77 } else { | |
78 _optional_support.isCurrentThreadCpuTimeSupported = 0; | |
79 _optional_support.isOtherThreadCpuTimeSupported = 0; | |
80 } | |
81 _optional_support.isBootClassPathSupported = 1; | |
82 _optional_support.isObjectMonitorUsageSupported = 1; | |
83 #ifndef SERVICES_KERNEL | |
84 // This depends on the heap inspector | |
85 _optional_support.isSynchronizerUsageSupported = 1; | |
86 #endif // SERVICES_KERNEL | |
87 } | |
88 | |
89 void Management::initialize(TRAPS) { | |
90 // Start the low memory detector thread | |
91 LowMemoryDetector::initialize(); | |
92 | |
93 if (ManagementServer) { | |
94 ResourceMark rm(THREAD); | |
95 HandleMark hm(THREAD); | |
96 | |
97 // Load and initialize the sun.management.Agent class | |
98 // invoke startAgent method to start the management server | |
99 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
100 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::sun_management_Agent(), | |
101 loader, | |
102 Handle(), | |
103 true, | |
104 CHECK); | |
105 instanceKlassHandle ik (THREAD, k); | |
106 | |
107 JavaValue result(T_VOID); | |
108 JavaCalls::call_static(&result, | |
109 ik, | |
110 vmSymbolHandles::startAgent_name(), | |
111 vmSymbolHandles::void_method_signature(), | |
112 CHECK); | |
113 } | |
114 } | |
115 | |
116 void Management::get_optional_support(jmmOptionalSupport* support) { | |
117 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); | |
118 } | |
119 | |
120 klassOop Management::load_and_initialize_klass(symbolHandle sh, TRAPS) { | |
121 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); | |
122 instanceKlassHandle ik (THREAD, k); | |
123 if (ik->should_be_initialized()) { | |
124 ik->initialize(CHECK_NULL); | |
125 } | |
126 return ik(); | |
127 } | |
128 | |
129 void Management::record_vm_startup_time(jlong begin, jlong duration) { | |
130 // if the performance counter is not initialized, | |
131 // then vm initialization failed; simply return. | |
132 if (_begin_vm_creation_time == NULL) return; | |
133 | |
134 _begin_vm_creation_time->set_value(begin); | |
135 _end_vm_creation_time->set_value(begin + duration); | |
136 PerfMemory::set_accessible(true); | |
137 } | |
138 | |
139 jlong Management::timestamp() { | |
140 TimeStamp t; | |
141 t.update(); | |
142 return t.ticks() - _stamp.ticks(); | |
143 } | |
144 | |
145 void Management::oops_do(OopClosure* f) { | |
146 MemoryService::oops_do(f); | |
147 ThreadService::oops_do(f); | |
148 | |
149 f->do_oop((oop*) &_sensor_klass); | |
150 f->do_oop((oop*) &_threadInfo_klass); | |
151 f->do_oop((oop*) &_memoryUsage_klass); | |
152 f->do_oop((oop*) &_memoryPoolMXBean_klass); | |
153 f->do_oop((oop*) &_memoryManagerMXBean_klass); | |
154 f->do_oop((oop*) &_garbageCollectorMXBean_klass); | |
155 f->do_oop((oop*) &_managementFactory_klass); | |
156 } | |
157 | |
158 klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { | |
159 if (_threadInfo_klass == NULL) { | |
160 _threadInfo_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_ThreadInfo(), CHECK_NULL); | |
161 } | |
162 return _threadInfo_klass; | |
163 } | |
164 | |
165 klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) { | |
166 if (_memoryUsage_klass == NULL) { | |
167 _memoryUsage_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryUsage(), CHECK_NULL); | |
168 } | |
169 return _memoryUsage_klass; | |
170 } | |
171 | |
172 klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { | |
173 if (_memoryPoolMXBean_klass == NULL) { | |
174 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); | |
175 } | |
176 return _memoryPoolMXBean_klass; | |
177 } | |
178 | |
179 klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { | |
180 if (_memoryManagerMXBean_klass == NULL) { | |
181 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); | |
182 } | |
183 return _memoryManagerMXBean_klass; | |
184 } | |
185 | |
186 klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { | |
187 if (_garbageCollectorMXBean_klass == NULL) { | |
188 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); | |
189 } | |
190 return _garbageCollectorMXBean_klass; | |
191 } | |
192 | |
193 klassOop Management::sun_management_Sensor_klass(TRAPS) { | |
194 if (_sensor_klass == NULL) { | |
195 _sensor_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_Sensor(), CHECK_NULL); | |
196 } | |
197 return _sensor_klass; | |
198 } | |
199 | |
200 klassOop Management::sun_management_ManagementFactory_klass(TRAPS) { | |
201 if (_managementFactory_klass == NULL) { | |
202 _managementFactory_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_ManagementFactory(), CHECK_NULL); | |
203 } | |
204 return _managementFactory_klass; | |
205 } | |
206 | |
207 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { | |
208 Handle snapshot_thread(THREAD, snapshot->threadObj()); | |
209 | |
210 jlong contended_time; | |
211 jlong waited_time; | |
212 if (ThreadService::is_thread_monitoring_contention()) { | |
213 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); | |
214 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); | |
215 } else { | |
216 // set them to -1 if thread contention monitoring is disabled. | |
217 contended_time = max_julong; | |
218 waited_time = max_julong; | |
219 } | |
220 | |
221 int thread_status = snapshot->thread_status(); | |
222 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); | |
223 if (snapshot->is_ext_suspended()) { | |
224 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; | |
225 } | |
226 if (snapshot->is_in_native()) { | |
227 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; | |
228 } | |
229 | |
230 ThreadStackTrace* st = snapshot->get_stack_trace(); | |
231 Handle stacktrace_h; | |
232 if (st != NULL) { | |
233 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); | |
234 } else { | |
235 stacktrace_h = Handle(); | |
236 } | |
237 | |
238 args->push_oop(snapshot_thread); | |
239 args->push_int(thread_status); | |
240 args->push_oop(Handle(THREAD, snapshot->blocker_object())); | |
241 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); | |
242 args->push_long(snapshot->contended_enter_count()); | |
243 args->push_long(contended_time); | |
244 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); | |
245 args->push_long(waited_time); | |
246 args->push_oop(stacktrace_h); | |
247 } | |
248 | |
249 // Helper function to construct a ThreadInfo object | |
250 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { | |
251 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
252 instanceKlassHandle ik (THREAD, k); | |
253 | |
254 JavaValue result(T_VOID); | |
255 JavaCallArguments args(14); | |
256 | |
257 // First allocate a ThreadObj object and | |
258 // push the receiver as the first argument | |
259 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
260 args.push_oop(element); | |
261 | |
262 // initialize the arguments for the ThreadInfo constructor | |
263 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
264 | |
265 // Call ThreadInfo constructor with no locked monitors and synchronizers | |
266 JavaCalls::call_special(&result, | |
267 ik, | |
268 vmSymbolHandles::object_initializer_name(), | |
269 vmSymbolHandles::java_lang_management_ThreadInfo_constructor_signature(), | |
270 &args, | |
271 CHECK_NULL); | |
272 | |
273 return (instanceOop) element(); | |
274 } | |
275 | |
276 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, | |
277 objArrayHandle monitors_array, | |
278 typeArrayHandle depths_array, | |
279 objArrayHandle synchronizers_array, | |
280 TRAPS) { | |
281 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
282 instanceKlassHandle ik (THREAD, k); | |
283 | |
284 JavaValue result(T_VOID); | |
285 JavaCallArguments args(17); | |
286 | |
287 // First allocate a ThreadObj object and | |
288 // push the receiver as the first argument | |
289 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
290 args.push_oop(element); | |
291 | |
292 // initialize the arguments for the ThreadInfo constructor | |
293 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
294 | |
295 // push the locked monitors and synchronizers in the arguments | |
296 args.push_oop(monitors_array); | |
297 args.push_oop(depths_array); | |
298 args.push_oop(synchronizers_array); | |
299 | |
300 // Call ThreadInfo constructor with locked monitors and synchronizers | |
301 JavaCalls::call_special(&result, | |
302 ik, | |
303 vmSymbolHandles::object_initializer_name(), | |
304 vmSymbolHandles::java_lang_management_ThreadInfo_with_locks_constructor_signature(), | |
305 &args, | |
306 CHECK_NULL); | |
307 | |
308 return (instanceOop) element(); | |
309 } | |
310 | |
311 // Helper functions | |
312 static JavaThread* find_java_thread_from_id(jlong thread_id) { | |
313 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); | |
314 | |
315 JavaThread* java_thread = NULL; | |
316 // Sequential search for now. Need to do better optimization later. | |
317 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
318 oop tobj = thread->threadObj(); | |
319 if (!thread->is_exiting() && | |
320 tobj != NULL && | |
321 thread_id == java_lang_Thread::thread_id(tobj)) { | |
322 java_thread = thread; | |
323 break; | |
324 } | |
325 } | |
326 return java_thread; | |
327 } | |
328 | |
329 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { | |
330 if (mgr == NULL) { | |
331 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
332 } | |
333 oop mgr_obj = JNIHandles::resolve(mgr); | |
334 instanceHandle h(THREAD, (instanceOop) mgr_obj); | |
335 | |
336 klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); | |
337 if (!h->is_a(k)) { | |
338 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
339 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", | |
340 NULL); | |
341 } | |
342 | |
343 MemoryManager* gc = MemoryService::get_memory_manager(h); | |
344 if (gc == NULL || !gc->is_gc_memory_manager()) { | |
345 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
346 "Invalid GC memory manager", | |
347 NULL); | |
348 } | |
349 return (GCMemoryManager*) gc; | |
350 } | |
351 | |
352 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { | |
353 if (obj == NULL) { | |
354 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
355 } | |
356 | |
357 oop pool_obj = JNIHandles::resolve(obj); | |
358 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
359 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
360 | |
361 return MemoryService::get_memory_pool(ph); | |
362 } | |
363 | |
364 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { | |
365 int num_threads = ids_ah->length(); | |
366 // should be non-empty array | |
367 if (num_threads == 0) { | |
368 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
369 "Empty array of thread IDs"); | |
370 } | |
371 | |
372 // Validate input thread IDs | |
373 int i = 0; | |
374 for (i = 0; i < num_threads; i++) { | |
375 jlong tid = ids_ah->long_at(i); | |
376 if (tid <= 0) { | |
377 // throw exception if invalid thread id. | |
378 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
379 "Invalid thread ID entry"); | |
380 } | |
381 } | |
382 | |
383 } | |
384 | |
385 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { | |
386 | |
387 // check if the element of infoArray is of type ThreadInfo class | |
388 klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); | |
389 klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass(); | |
390 if (element_klass != threadinfo_klass) { | |
391 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
392 "infoArray element type is not ThreadInfo class"); | |
393 } | |
394 | |
395 } | |
396 | |
397 | |
398 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { | |
399 if (obj == NULL) { | |
400 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
401 } | |
402 | |
403 oop mgr_obj = JNIHandles::resolve(obj); | |
404 assert(mgr_obj->is_instance(), "Should be an instanceOop"); | |
405 instanceHandle mh(THREAD, (instanceOop) mgr_obj); | |
406 | |
407 return MemoryService::get_memory_manager(mh); | |
408 } | |
409 | |
410 // Returns a version string and sets major and minor version if | |
411 // the input parameters are non-null. | |
412 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) | |
413 return JMM_VERSION; | |
414 JVM_END | |
415 | |
416 // Gets the list of VM monitoring and management optional supports | |
417 // Returns 0 if succeeded; otherwise returns non-zero. | |
418 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) | |
419 if (support == NULL) { | |
420 return -1; | |
421 } | |
422 Management::get_optional_support(support); | |
423 return 0; | |
424 JVM_END | |
425 | |
426 // Returns a java.lang.String object containing the input arguments to the VM. | |
427 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) | |
428 ResourceMark rm(THREAD); | |
429 | |
430 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
431 return NULL; | |
432 } | |
433 | |
434 char** vm_flags = Arguments::jvm_flags_array(); | |
435 char** vm_args = Arguments::jvm_args_array(); | |
436 int num_flags = Arguments::num_jvm_flags(); | |
437 int num_args = Arguments::num_jvm_args(); | |
438 | |
439 size_t length = 1; // null terminator | |
440 int i; | |
441 for (i = 0; i < num_flags; i++) { | |
442 length += strlen(vm_flags[i]); | |
443 } | |
444 for (i = 0; i < num_args; i++) { | |
445 length += strlen(vm_args[i]); | |
446 } | |
447 // add a space between each argument | |
448 length += num_flags + num_args - 1; | |
449 | |
450 // Return the list of input arguments passed to the VM | |
451 // and preserve the order that the VM processes. | |
452 char* args = NEW_RESOURCE_ARRAY(char, length); | |
453 args[0] = '\0'; | |
454 // concatenate all jvm_flags | |
455 if (num_flags > 0) { | |
456 strcat(args, vm_flags[0]); | |
457 for (i = 1; i < num_flags; i++) { | |
458 strcat(args, " "); | |
459 strcat(args, vm_flags[i]); | |
460 } | |
461 } | |
462 | |
463 if (num_args > 0 && num_flags > 0) { | |
464 // append a space if args already contains one or more jvm_flags | |
465 strcat(args, " "); | |
466 } | |
467 | |
468 // concatenate all jvm_args | |
469 if (num_args > 0) { | |
470 strcat(args, vm_args[0]); | |
471 for (i = 1; i < num_args; i++) { | |
472 strcat(args, " "); | |
473 strcat(args, vm_args[i]); | |
474 } | |
475 } | |
476 | |
477 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); | |
478 return JNIHandles::make_local(env, hargs()); | |
479 JVM_END | |
480 | |
481 // Returns an array of java.lang.String object containing the input arguments to the VM. | |
482 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) | |
483 ResourceMark rm(THREAD); | |
484 | |
485 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
486 return NULL; | |
487 } | |
488 | |
489 char** vm_flags = Arguments::jvm_flags_array(); | |
490 char** vm_args = Arguments::jvm_args_array(); | |
491 int num_flags = Arguments::num_jvm_flags(); | |
492 int num_args = Arguments::num_jvm_args(); | |
493 | |
494 instanceKlassHandle ik (THREAD, SystemDictionary::string_klass()); | |
495 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); | |
496 objArrayHandle result_h(THREAD, r); | |
497 | |
498 int index = 0; | |
499 for (int j = 0; j < num_flags; j++, index++) { | |
500 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); | |
501 result_h->obj_at_put(index, h()); | |
502 } | |
503 for (int i = 0; i < num_args; i++, index++) { | |
504 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); | |
505 result_h->obj_at_put(index, h()); | |
506 } | |
507 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
508 JVM_END | |
509 | |
510 // Returns an array of java/lang/management/MemoryPoolMXBean object | |
511 // one for each memory pool if obj == null; otherwise returns | |
512 // an array of memory pools for a given memory manager if | |
513 // it is a valid memory manager. | |
514 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) | |
515 ResourceMark rm(THREAD); | |
516 | |
517 int num_memory_pools; | |
518 MemoryManager* mgr = NULL; | |
519 if (obj == NULL) { | |
520 num_memory_pools = MemoryService::num_memory_pools(); | |
521 } else { | |
522 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); | |
523 if (mgr == NULL) { | |
524 return NULL; | |
525 } | |
526 num_memory_pools = mgr->num_memory_pools(); | |
527 } | |
528 | |
529 // Allocate the resulting MemoryPoolMXBean[] object | |
530 klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); | |
531 instanceKlassHandle ik (THREAD, k); | |
532 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); | |
533 objArrayHandle poolArray(THREAD, r); | |
534 | |
535 if (mgr == NULL) { | |
536 // Get all memory pools | |
537 for (int i = 0; i < num_memory_pools; i++) { | |
538 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
539 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
540 instanceHandle ph(THREAD, p); | |
541 poolArray->obj_at_put(i, ph()); | |
542 } | |
543 } else { | |
544 // Get memory pools managed by a given memory manager | |
545 for (int i = 0; i < num_memory_pools; i++) { | |
546 MemoryPool* pool = mgr->get_memory_pool(i); | |
547 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
548 instanceHandle ph(THREAD, p); | |
549 poolArray->obj_at_put(i, ph()); | |
550 } | |
551 } | |
552 return (jobjectArray) JNIHandles::make_local(env, poolArray()); | |
553 JVM_END | |
554 | |
555 // Returns an array of java/lang/management/MemoryManagerMXBean object | |
556 // one for each memory manager if obj == null; otherwise returns | |
557 // an array of memory managers for a given memory pool if | |
558 // it is a valid memory pool. | |
559 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) | |
560 ResourceMark rm(THREAD); | |
561 | |
562 int num_mgrs; | |
563 MemoryPool* pool = NULL; | |
564 if (obj == NULL) { | |
565 num_mgrs = MemoryService::num_memory_managers(); | |
566 } else { | |
567 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
568 if (pool == NULL) { | |
569 return NULL; | |
570 } | |
571 num_mgrs = pool->num_memory_managers(); | |
572 } | |
573 | |
574 // Allocate the resulting MemoryManagerMXBean[] object | |
575 klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); | |
576 instanceKlassHandle ik (THREAD, k); | |
577 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); | |
578 objArrayHandle mgrArray(THREAD, r); | |
579 | |
580 if (pool == NULL) { | |
581 // Get all memory managers | |
582 for (int i = 0; i < num_mgrs; i++) { | |
583 MemoryManager* mgr = MemoryService::get_memory_manager(i); | |
584 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
585 instanceHandle ph(THREAD, p); | |
586 mgrArray->obj_at_put(i, ph()); | |
587 } | |
588 } else { | |
589 // Get memory managers for a given memory pool | |
590 for (int i = 0; i < num_mgrs; i++) { | |
591 MemoryManager* mgr = pool->get_memory_manager(i); | |
592 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
593 instanceHandle ph(THREAD, p); | |
594 mgrArray->obj_at_put(i, ph()); | |
595 } | |
596 } | |
597 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); | |
598 JVM_END | |
599 | |
600 | |
601 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
602 // of a given memory pool. | |
603 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
604 ResourceMark rm(THREAD); | |
605 | |
606 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
607 if (pool != NULL) { | |
608 MemoryUsage usage = pool->get_memory_usage(); | |
609 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
610 return JNIHandles::make_local(env, h()); | |
611 } else { | |
612 return NULL; | |
613 } | |
614 JVM_END | |
615 | |
616 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
617 // of a given memory pool. | |
618 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
619 ResourceMark rm(THREAD); | |
620 | |
621 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
622 if (pool != NULL) { | |
623 MemoryUsage usage = pool->get_peak_memory_usage(); | |
624 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
625 return JNIHandles::make_local(env, h()); | |
626 } else { | |
627 return NULL; | |
628 } | |
629 JVM_END | |
630 | |
631 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
632 // of a given memory pool after most recent GC. | |
633 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) | |
634 ResourceMark rm(THREAD); | |
635 | |
636 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
637 if (pool != NULL && pool->is_collected_pool()) { | |
638 MemoryUsage usage = pool->get_last_collection_usage(); | |
639 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
640 return JNIHandles::make_local(env, h()); | |
641 } else { | |
642 return NULL; | |
643 } | |
644 JVM_END | |
645 | |
646 // Sets the memory pool sensor for a threshold type | |
647 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) | |
648 if (obj == NULL || sensorObj == NULL) { | |
649 THROW(vmSymbols::java_lang_NullPointerException()); | |
650 } | |
651 | |
652 klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK); | |
653 oop s = JNIHandles::resolve(sensorObj); | |
654 assert(s->is_instance(), "Sensor should be an instanceOop"); | |
655 instanceHandle sensor_h(THREAD, (instanceOop) s); | |
656 if (!sensor_h->is_a(sensor_klass)) { | |
657 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
658 "Sensor is not an instance of sun.management.Sensor class"); | |
659 } | |
660 | |
661 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); | |
662 assert(mpool != NULL, "MemoryPool should exist"); | |
663 | |
664 switch (type) { | |
665 case JMM_USAGE_THRESHOLD_HIGH: | |
666 case JMM_USAGE_THRESHOLD_LOW: | |
667 // have only one sensor for threshold high and low | |
668 mpool->set_usage_sensor_obj(sensor_h); | |
669 break; | |
670 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
671 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
672 // have only one sensor for threshold high and low | |
673 mpool->set_gc_usage_sensor_obj(sensor_h); | |
674 break; | |
675 default: | |
676 assert(false, "Unrecognized type"); | |
677 } | |
678 | |
679 JVM_END | |
680 | |
681 | |
682 // Sets the threshold of a given memory pool. | |
683 // Returns the previous threshold. | |
684 // | |
685 // Input parameters: | |
686 // pool - the MemoryPoolMXBean object | |
687 // type - threshold type | |
688 // threshold - the new threshold (must not be negative) | |
689 // | |
690 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) | |
691 if (threshold < 0) { | |
692 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
693 "Invalid threshold value", | |
694 -1); | |
695 } | |
696 | |
489
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
parents:
350
diff
changeset
|
697 if ((size_t)threshold > max_uintx) { |
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
parents:
350
diff
changeset
|
698 stringStream st; |
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
parents:
350
diff
changeset
|
699 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); |
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
parents:
350
diff
changeset
|
700 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); |
0 | 701 } |
702 | |
703 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); | |
704 assert(pool != NULL, "MemoryPool should exist"); | |
705 | |
706 jlong prev = 0; | |
707 switch (type) { | |
708 case JMM_USAGE_THRESHOLD_HIGH: | |
709 if (!pool->usage_threshold()->is_high_threshold_supported()) { | |
710 return -1; | |
711 } | |
712 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); | |
713 break; | |
714 | |
715 case JMM_USAGE_THRESHOLD_LOW: | |
716 if (!pool->usage_threshold()->is_low_threshold_supported()) { | |
717 return -1; | |
718 } | |
719 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); | |
720 break; | |
721 | |
722 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
723 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { | |
724 return -1; | |
725 } | |
726 // return and the new threshold is effective for the next GC | |
727 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); | |
728 | |
729 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
730 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { | |
731 return -1; | |
732 } | |
733 // return and the new threshold is effective for the next GC | |
734 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); | |
735 | |
736 default: | |
737 assert(false, "Unrecognized type"); | |
738 return -1; | |
739 } | |
740 | |
741 // When the threshold is changed, reevaluate if the low memory | |
742 // detection is enabled. | |
743 if (prev != threshold) { | |
744 LowMemoryDetector::recompute_enabled_for_collected_pools(); | |
745 LowMemoryDetector::detect_low_memory(pool); | |
746 } | |
747 return prev; | |
748 JVM_END | |
749 | |
750 // Returns a java/lang/management/MemoryUsage object representing | |
751 // the memory usage for the heap or non-heap memory. | |
752 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) | |
753 ResourceMark rm(THREAD); | |
754 | |
755 // Calculate the memory usage | |
756 size_t total_init = 0; | |
757 size_t total_used = 0; | |
758 size_t total_committed = 0; | |
759 size_t total_max = 0; | |
760 bool has_undefined_init_size = false; | |
761 bool has_undefined_max_size = false; | |
762 | |
763 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { | |
764 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
765 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { | |
766 MemoryUsage u = pool->get_memory_usage(); | |
767 total_used += u.used(); | |
768 total_committed += u.committed(); | |
769 | |
770 // if any one of the memory pool has undefined init_size or max_size, | |
771 // set it to -1 | |
772 if (u.init_size() == (size_t)-1) { | |
773 has_undefined_init_size = true; | |
774 } | |
775 if (!has_undefined_init_size) { | |
776 total_init += u.init_size(); | |
777 } | |
778 | |
779 if (u.max_size() == (size_t)-1) { | |
780 has_undefined_max_size = true; | |
781 } | |
782 if (!has_undefined_max_size) { | |
783 total_max += u.max_size(); | |
784 } | |
785 } | |
786 } | |
787 | |
788 // In our current implementation, all pools should have | |
789 // defined init and max size | |
790 assert(!has_undefined_init_size, "Undefined init size"); | |
791 assert(!has_undefined_max_size, "Undefined max size"); | |
792 | |
793 MemoryUsage usage((heap ? Arguments::initial_heap_size() : total_init), | |
794 total_used, | |
795 total_committed, | |
796 (heap ? Universe::heap()->max_capacity() : total_max)); | |
797 | |
798 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
799 return JNIHandles::make_local(env, obj()); | |
800 JVM_END | |
801 | |
802 // Returns the boolean value of a given attribute. | |
803 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) | |
804 switch (att) { | |
805 case JMM_VERBOSE_GC: | |
806 return MemoryService::get_verbose(); | |
807 case JMM_VERBOSE_CLASS: | |
808 return ClassLoadingService::get_verbose(); | |
809 case JMM_THREAD_CONTENTION_MONITORING: | |
810 return ThreadService::is_thread_monitoring_contention(); | |
811 case JMM_THREAD_CPU_TIME: | |
812 return ThreadService::is_thread_cpu_time_enabled(); | |
813 default: | |
814 assert(0, "Unrecognized attribute"); | |
815 return false; | |
816 } | |
817 JVM_END | |
818 | |
819 // Sets the given boolean attribute and returns the previous value. | |
820 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) | |
821 switch (att) { | |
822 case JMM_VERBOSE_GC: | |
823 return MemoryService::set_verbose(flag != 0); | |
824 case JMM_VERBOSE_CLASS: | |
825 return ClassLoadingService::set_verbose(flag != 0); | |
826 case JMM_THREAD_CONTENTION_MONITORING: | |
827 return ThreadService::set_thread_monitoring_contention(flag != 0); | |
828 case JMM_THREAD_CPU_TIME: | |
829 return ThreadService::set_thread_cpu_time_enabled(flag != 0); | |
830 default: | |
831 assert(0, "Unrecognized attribute"); | |
832 return false; | |
833 } | |
834 JVM_END | |
835 | |
836 | |
837 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { | |
838 switch (att) { | |
839 case JMM_GC_TIME_MS: | |
840 return mgr->gc_time_ms(); | |
841 | |
842 case JMM_GC_COUNT: | |
843 return mgr->gc_count(); | |
844 | |
845 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: | |
846 // current implementation only has 1 ext attribute | |
847 return 1; | |
848 | |
849 default: | |
850 assert(0, "Unrecognized GC attribute"); | |
851 return -1; | |
852 } | |
853 } | |
854 | |
855 class VmThreadCountClosure: public ThreadClosure { | |
856 private: | |
857 int _count; | |
858 public: | |
859 VmThreadCountClosure() : _count(0) {}; | |
860 void do_thread(Thread* thread); | |
861 int count() { return _count; } | |
862 }; | |
863 | |
864 void VmThreadCountClosure::do_thread(Thread* thread) { | |
865 // exclude externally visible JavaThreads | |
866 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
867 return; | |
868 } | |
869 | |
870 _count++; | |
871 } | |
872 | |
873 static jint get_vm_thread_count() { | |
874 VmThreadCountClosure vmtcc; | |
875 { | |
876 MutexLockerEx ml(Threads_lock); | |
877 Threads::threads_do(&vmtcc); | |
878 } | |
879 | |
880 return vmtcc.count(); | |
881 } | |
882 | |
883 static jint get_num_flags() { | |
884 // last flag entry is always NULL, so subtract 1 | |
885 int nFlags = (int) Flag::numFlags - 1; | |
886 int count = 0; | |
887 for (int i = 0; i < nFlags; i++) { | |
888 Flag* flag = &Flag::flags[i]; | |
350 | 889 // Exclude the locked (diagnostic, experimental) flags |
0 | 890 if (flag->is_unlocked() || flag->is_unlocker()) { |
891 count++; | |
892 } | |
893 } | |
894 return count; | |
895 } | |
896 | |
897 static jlong get_long_attribute(jmmLongAttribute att) { | |
898 switch (att) { | |
899 case JMM_CLASS_LOADED_COUNT: | |
900 return ClassLoadingService::loaded_class_count(); | |
901 | |
902 case JMM_CLASS_UNLOADED_COUNT: | |
903 return ClassLoadingService::unloaded_class_count(); | |
904 | |
905 case JMM_THREAD_TOTAL_COUNT: | |
906 return ThreadService::get_total_thread_count(); | |
907 | |
908 case JMM_THREAD_LIVE_COUNT: | |
909 return ThreadService::get_live_thread_count(); | |
910 | |
911 case JMM_THREAD_PEAK_COUNT: | |
912 return ThreadService::get_peak_thread_count(); | |
913 | |
914 case JMM_THREAD_DAEMON_COUNT: | |
915 return ThreadService::get_daemon_thread_count(); | |
916 | |
917 case JMM_JVM_INIT_DONE_TIME_MS: | |
918 return Management::vm_init_done_time(); | |
919 | |
920 case JMM_COMPILE_TOTAL_TIME_MS: | |
921 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); | |
922 | |
923 case JMM_OS_PROCESS_ID: | |
924 return os::current_process_id(); | |
925 | |
926 // Hotspot-specific counters | |
927 case JMM_CLASS_LOADED_BYTES: | |
928 return ClassLoadingService::loaded_class_bytes(); | |
929 | |
930 case JMM_CLASS_UNLOADED_BYTES: | |
931 return ClassLoadingService::unloaded_class_bytes(); | |
932 | |
933 case JMM_SHARED_CLASS_LOADED_COUNT: | |
934 return ClassLoadingService::loaded_shared_class_count(); | |
935 | |
936 case JMM_SHARED_CLASS_UNLOADED_COUNT: | |
937 return ClassLoadingService::unloaded_shared_class_count(); | |
938 | |
939 | |
940 case JMM_SHARED_CLASS_LOADED_BYTES: | |
941 return ClassLoadingService::loaded_shared_class_bytes(); | |
942 | |
943 case JMM_SHARED_CLASS_UNLOADED_BYTES: | |
944 return ClassLoadingService::unloaded_shared_class_bytes(); | |
945 | |
946 case JMM_TOTAL_CLASSLOAD_TIME_MS: | |
947 return ClassLoader::classloader_time_ms(); | |
948 | |
949 case JMM_VM_GLOBAL_COUNT: | |
950 return get_num_flags(); | |
951 | |
952 case JMM_SAFEPOINT_COUNT: | |
953 return RuntimeService::safepoint_count(); | |
954 | |
955 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: | |
956 return RuntimeService::safepoint_sync_time_ms(); | |
957 | |
958 case JMM_TOTAL_STOPPED_TIME_MS: | |
959 return RuntimeService::safepoint_time_ms(); | |
960 | |
961 case JMM_TOTAL_APP_TIME_MS: | |
962 return RuntimeService::application_time_ms(); | |
963 | |
964 case JMM_VM_THREAD_COUNT: | |
965 return get_vm_thread_count(); | |
966 | |
967 case JMM_CLASS_INIT_TOTAL_COUNT: | |
968 return ClassLoader::class_init_count(); | |
969 | |
970 case JMM_CLASS_INIT_TOTAL_TIME_MS: | |
971 return ClassLoader::class_init_time_ms(); | |
972 | |
973 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: | |
974 return ClassLoader::class_verify_time_ms(); | |
975 | |
976 case JMM_METHOD_DATA_SIZE_BYTES: | |
977 return ClassLoadingService::class_method_data_size(); | |
978 | |
979 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: | |
980 return os::physical_memory(); | |
981 | |
982 default: | |
983 return -1; | |
984 } | |
985 } | |
986 | |
987 | |
988 // Returns the long value of a given attribute. | |
989 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) | |
990 if (obj == NULL) { | |
991 return get_long_attribute(att); | |
992 } else { | |
993 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); | |
994 if (mgr != NULL) { | |
995 return get_gc_attribute(mgr, att); | |
996 } | |
997 } | |
998 return -1; | |
999 JVM_END | |
1000 | |
1001 // Gets the value of all attributes specified in the given array | |
1002 // and sets the value in the result array. | |
1003 // Returns the number of attributes found. | |
1004 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, | |
1005 jobject obj, | |
1006 jmmLongAttribute* atts, | |
1007 jint count, | |
1008 jlong* result)) | |
1009 | |
1010 int num_atts = 0; | |
1011 if (obj == NULL) { | |
1012 for (int i = 0; i < count; i++) { | |
1013 result[i] = get_long_attribute(atts[i]); | |
1014 if (result[i] != -1) { | |
1015 num_atts++; | |
1016 } | |
1017 } | |
1018 } else { | |
1019 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); | |
1020 for (int i = 0; i < count; i++) { | |
1021 result[i] = get_gc_attribute(mgr, atts[i]); | |
1022 if (result[i] != -1) { | |
1023 num_atts++; | |
1024 } | |
1025 } | |
1026 } | |
1027 return num_atts; | |
1028 JVM_END | |
1029 | |
1030 // Helper function to do thread dump for a specific list of threads | |
1031 static void do_thread_dump(ThreadDumpResult* dump_result, | |
1032 typeArrayHandle ids_ah, // array of thread ID (long[]) | |
1033 int num_threads, | |
1034 int max_depth, | |
1035 bool with_locked_monitors, | |
1036 bool with_locked_synchronizers, | |
1037 TRAPS) { | |
1038 | |
1039 // First get an array of threadObj handles. | |
1040 // A JavaThread may terminate before we get the stack trace. | |
1041 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
1042 { | |
1043 MutexLockerEx ml(Threads_lock); | |
1044 for (int i = 0; i < num_threads; i++) { | |
1045 jlong tid = ids_ah->long_at(i); | |
1046 JavaThread* jt = find_java_thread_from_id(tid); | |
1047 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); | |
1048 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); | |
1049 thread_handle_array->append(threadObj_h); | |
1050 } | |
1051 } | |
1052 | |
1053 // Obtain thread dumps and thread snapshot information | |
1054 VM_ThreadDump op(dump_result, | |
1055 thread_handle_array, | |
1056 num_threads, | |
1057 max_depth, /* stack depth */ | |
1058 with_locked_monitors, | |
1059 with_locked_synchronizers); | |
1060 VMThread::execute(&op); | |
1061 } | |
1062 | |
1063 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo | |
1064 // for the thread ID specified in the corresponding entry in | |
1065 // the given array of thread IDs; or NULL if the thread does not exist | |
1066 // or has terminated. | |
1067 // | |
1068 // Input parameters: | |
1069 // ids - array of thread IDs | |
1070 // maxDepth - the maximum depth of stack traces to be dumped: | |
1071 // maxDepth == -1 requests to dump entire stack trace. | |
1072 // maxDepth == 0 requests no stack trace. | |
1073 // infoArray - array of ThreadInfo objects | |
1074 // | |
1075 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) | |
1076 // Check if threads is null | |
1077 if (ids == NULL || infoArray == NULL) { | |
1078 THROW_(vmSymbols::java_lang_NullPointerException(), -1); | |
1079 } | |
1080 | |
1081 if (maxDepth < -1) { | |
1082 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1083 "Invalid maxDepth", -1); | |
1084 } | |
1085 | |
1086 ResourceMark rm(THREAD); | |
1087 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); | |
1088 typeArrayHandle ids_ah(THREAD, ta); | |
1089 | |
1090 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); | |
1091 objArrayOop oa = objArrayOop(infoArray_obj); | |
1092 objArrayHandle infoArray_h(THREAD, oa); | |
1093 | |
1094 // validate the thread id array | |
1095 validate_thread_id_array(ids_ah, CHECK_0); | |
1096 | |
1097 // validate the ThreadInfo[] parameters | |
1098 validate_thread_info_array(infoArray_h, CHECK_0); | |
1099 | |
1100 // infoArray must be of the same length as the given array of thread IDs | |
1101 int num_threads = ids_ah->length(); | |
1102 if (num_threads != infoArray_h->length()) { | |
1103 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1104 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); | |
1105 } | |
1106 | |
1107 if (JDK_Version::is_gte_jdk16x_version()) { | |
1108 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
1109 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); | |
1110 } | |
1111 | |
1112 // Must use ThreadDumpResult to store the ThreadSnapshot. | |
1113 // GC may occur after the thread snapshots are taken but before | |
1114 // this function returns. The threadObj and other oops kept | |
1115 // in the ThreadSnapshot are marked and adjusted during GC. | |
1116 ThreadDumpResult dump_result(num_threads); | |
1117 | |
1118 if (maxDepth == 0) { | |
1119 // no stack trace dumped - do not need to stop the world | |
1120 { | |
1121 MutexLockerEx ml(Threads_lock); | |
1122 for (int i = 0; i < num_threads; i++) { | |
1123 jlong tid = ids_ah->long_at(i); | |
1124 JavaThread* jt = find_java_thread_from_id(tid); | |
1125 ThreadSnapshot* ts; | |
1126 if (jt == NULL) { | |
1127 // if the thread does not exist or now it is terminated, | |
1128 // create dummy snapshot | |
1129 ts = new ThreadSnapshot(); | |
1130 } else { | |
1131 ts = new ThreadSnapshot(jt); | |
1132 } | |
1133 dump_result.add_thread_snapshot(ts); | |
1134 } | |
1135 } | |
1136 } else { | |
1137 // obtain thread dump with the specific list of threads with stack trace | |
1138 | |
1139 do_thread_dump(&dump_result, | |
1140 ids_ah, | |
1141 num_threads, | |
1142 maxDepth, | |
1143 false, /* no locked monitor */ | |
1144 false, /* no locked synchronizers */ | |
1145 CHECK_0); | |
1146 } | |
1147 | |
1148 int num_snapshots = dump_result.num_snapshots(); | |
1149 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); | |
1150 int index = 0; | |
1151 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { | |
1152 // For each thread, create an java/lang/management/ThreadInfo object | |
1153 // and fill with the thread information | |
1154 | |
1155 if (ts->threadObj() == NULL) { | |
1156 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
1157 infoArray_h->obj_at_put(index, NULL); | |
1158 continue; | |
1159 } | |
1160 | |
1161 // Create java.lang.management.ThreadInfo object | |
1162 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); | |
1163 infoArray_h->obj_at_put(index, info_obj); | |
1164 } | |
1165 return 0; | |
1166 JVM_END | |
1167 | |
1168 // Dump thread info for the specified threads. | |
1169 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo | |
1170 // for the thread ID specified in the corresponding entry in | |
1171 // the given array of thread IDs; or NULL if the thread does not exist | |
1172 // or has terminated. | |
1173 // | |
1174 // Input parameter: | |
1175 // ids - array of thread IDs; NULL indicates all live threads | |
1176 // locked_monitors - if true, dump locked object monitors | |
1177 // locked_synchronizers - if true, dump locked JSR-166 synchronizers | |
1178 // | |
1179 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) | |
1180 ResourceMark rm(THREAD); | |
1181 | |
1182 if (JDK_Version::is_gte_jdk16x_version()) { | |
1183 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
1184 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); | |
1185 } | |
1186 | |
1187 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); | |
1188 int num_threads = (ta != NULL ? ta->length() : 0); | |
1189 typeArrayHandle ids_ah(THREAD, ta); | |
1190 | |
1191 ThreadDumpResult dump_result(num_threads); // can safepoint | |
1192 | |
1193 if (ids_ah() != NULL) { | |
1194 | |
1195 // validate the thread id array | |
1196 validate_thread_id_array(ids_ah, CHECK_NULL); | |
1197 | |
1198 // obtain thread dump of a specific list of threads | |
1199 do_thread_dump(&dump_result, | |
1200 ids_ah, | |
1201 num_threads, | |
1202 -1, /* entire stack */ | |
1203 (locked_monitors ? true : false), /* with locked monitors */ | |
1204 (locked_synchronizers ? true : false), /* with locked synchronizers */ | |
1205 CHECK_NULL); | |
1206 } else { | |
1207 // obtain thread dump of all threads | |
1208 VM_ThreadDump op(&dump_result, | |
1209 -1, /* entire stack */ | |
1210 (locked_monitors ? true : false), /* with locked monitors */ | |
1211 (locked_synchronizers ? true : false) /* with locked synchronizers */); | |
1212 VMThread::execute(&op); | |
1213 } | |
1214 | |
1215 int num_snapshots = dump_result.num_snapshots(); | |
1216 | |
1217 // create the result ThreadInfo[] object | |
1218 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
1219 instanceKlassHandle ik (THREAD, k); | |
1220 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); | |
1221 objArrayHandle result_h(THREAD, r); | |
1222 | |
1223 int index = 0; | |
1224 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { | |
1225 if (ts->threadObj() == NULL) { | |
1226 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
1227 result_h->obj_at_put(index, NULL); | |
1228 continue; | |
1229 } | |
1230 | |
1231 | |
1232 | |
1233 ThreadStackTrace* stacktrace = ts->get_stack_trace(); | |
1234 assert(stacktrace != NULL, "Must have a stack trace dumped"); | |
1235 | |
1236 // Create Object[] filled with locked monitors | |
1237 // Create int[] filled with the stack depth where a monitor was locked | |
1238 int num_frames = stacktrace->get_stack_depth(); | |
1239 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); | |
1240 | |
1241 // Count the total number of locked monitors | |
1242 for (int i = 0; i < num_frames; i++) { | |
1243 StackFrameInfo* frame = stacktrace->stack_frame_at(i); | |
1244 num_locked_monitors += frame->num_locked_monitors(); | |
1245 } | |
1246 | |
1247 objArrayHandle monitors_array; | |
1248 typeArrayHandle depths_array; | |
1249 objArrayHandle synchronizers_array; | |
1250 | |
1251 if (locked_monitors) { | |
1252 // Constructs Object[] and int[] to contain the object monitor and the stack depth | |
1253 // where the thread locked it | |
1254 objArrayOop array = oopFactory::new_system_objArray(num_locked_monitors, CHECK_NULL); | |
1255 objArrayHandle mh(THREAD, array); | |
1256 monitors_array = mh; | |
1257 | |
1258 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); | |
1259 typeArrayHandle dh(THREAD, tarray); | |
1260 depths_array = dh; | |
1261 | |
1262 int count = 0; | |
1263 int j = 0; | |
1264 for (int depth = 0; depth < num_frames; depth++) { | |
1265 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); | |
1266 int len = frame->num_locked_monitors(); | |
1267 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); | |
1268 for (j = 0; j < len; j++) { | |
1269 oop monitor = locked_monitors->at(j); | |
1270 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); | |
1271 monitors_array->obj_at_put(count, monitor); | |
1272 depths_array->int_at_put(count, depth); | |
1273 count++; | |
1274 } | |
1275 } | |
1276 | |
1277 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); | |
1278 for (j = 0; j < jni_locked_monitors->length(); j++) { | |
1279 oop object = jni_locked_monitors->at(j); | |
1280 assert(object != NULL && object->is_instance(), "must be a Java object"); | |
1281 monitors_array->obj_at_put(count, object); | |
1282 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info | |
1283 depths_array->int_at_put(count, -1); | |
1284 count++; | |
1285 } | |
1286 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); | |
1287 } | |
1288 | |
1289 if (locked_synchronizers) { | |
1290 // Create Object[] filled with locked JSR-166 synchronizers | |
1291 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); | |
1292 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); | |
1293 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); | |
1294 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); | |
1295 | |
1296 objArrayOop array = oopFactory::new_system_objArray(num_locked_synchronizers, CHECK_NULL); | |
1297 objArrayHandle sh(THREAD, array); | |
1298 synchronizers_array = sh; | |
1299 | |
1300 for (int k = 0; k < num_locked_synchronizers; k++) { | |
1301 synchronizers_array->obj_at_put(k, locks->at(k)); | |
1302 } | |
1303 } | |
1304 | |
1305 // Create java.lang.management.ThreadInfo object | |
1306 instanceOop info_obj = Management::create_thread_info_instance(ts, | |
1307 monitors_array, | |
1308 depths_array, | |
1309 synchronizers_array, | |
1310 CHECK_NULL); | |
1311 result_h->obj_at_put(index, info_obj); | |
1312 } | |
1313 | |
1314 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
1315 JVM_END | |
1316 | |
1317 // Returns an array of Class objects. | |
1318 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) | |
1319 ResourceMark rm(THREAD); | |
1320 | |
1321 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter | |
1322 | |
1323 int num_classes = lce.num_loaded_classes(); | |
1324 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), num_classes, CHECK_0); | |
1325 objArrayHandle classes_ah(THREAD, r); | |
1326 | |
1327 for (int i = 0; i < num_classes; i++) { | |
1328 KlassHandle kh = lce.get_klass(i); | |
1329 oop mirror = Klass::cast(kh())->java_mirror(); | |
1330 classes_ah->obj_at_put(i, mirror); | |
1331 } | |
1332 | |
1333 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); | |
1334 JVM_END | |
1335 | |
1336 // Reset statistic. Return true if the requested statistic is reset. | |
1337 // Otherwise, return false. | |
1338 // | |
1339 // Input parameters: | |
1340 // obj - specify which instance the statistic associated with to be reset | |
1341 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. | |
1342 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. | |
1343 // type - the type of statistic to be reset | |
1344 // | |
1345 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) | |
1346 ResourceMark rm(THREAD); | |
1347 | |
1348 switch (type) { | |
1349 case JMM_STAT_PEAK_THREAD_COUNT: | |
1350 ThreadService::reset_peak_thread_count(); | |
1351 return true; | |
1352 | |
1353 case JMM_STAT_THREAD_CONTENTION_COUNT: | |
1354 case JMM_STAT_THREAD_CONTENTION_TIME: { | |
1355 jlong tid = obj.j; | |
1356 if (tid < 0) { | |
1357 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); | |
1358 } | |
1359 | |
1360 // Look for the JavaThread of this given tid | |
1361 MutexLockerEx ml(Threads_lock); | |
1362 if (tid == 0) { | |
1363 // reset contention statistics for all threads if tid == 0 | |
1364 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { | |
1365 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
1366 ThreadService::reset_contention_count_stat(java_thread); | |
1367 } else { | |
1368 ThreadService::reset_contention_time_stat(java_thread); | |
1369 } | |
1370 } | |
1371 } else { | |
1372 // reset contention statistics for a given thread | |
1373 JavaThread* java_thread = find_java_thread_from_id(tid); | |
1374 if (java_thread == NULL) { | |
1375 return false; | |
1376 } | |
1377 | |
1378 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
1379 ThreadService::reset_contention_count_stat(java_thread); | |
1380 } else { | |
1381 ThreadService::reset_contention_time_stat(java_thread); | |
1382 } | |
1383 } | |
1384 return true; | |
1385 break; | |
1386 } | |
1387 case JMM_STAT_PEAK_POOL_USAGE: { | |
1388 jobject o = obj.l; | |
1389 if (o == NULL) { | |
1390 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1391 } | |
1392 | |
1393 oop pool_obj = JNIHandles::resolve(o); | |
1394 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
1395 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
1396 | |
1397 MemoryPool* pool = MemoryService::get_memory_pool(ph); | |
1398 if (pool != NULL) { | |
1399 pool->reset_peak_memory_usage(); | |
1400 return true; | |
1401 } | |
1402 break; | |
1403 } | |
1404 case JMM_STAT_GC_STAT: { | |
1405 jobject o = obj.l; | |
1406 if (o == NULL) { | |
1407 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1408 } | |
1409 | |
1410 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); | |
1411 if (mgr != NULL) { | |
1412 mgr->reset_gc_stat(); | |
1413 return true; | |
1414 } | |
1415 break; | |
1416 } | |
1417 default: | |
1418 assert(0, "Unknown Statistic Type"); | |
1419 } | |
1420 return false; | |
1421 JVM_END | |
1422 | |
1423 // Returns the fast estimate of CPU time consumed by | |
1424 // a given thread (in nanoseconds). | |
1425 // If thread_id == 0, return CPU time for the current thread. | |
1426 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) | |
1427 if (!os::is_thread_cpu_time_supported()) { | |
1428 return -1; | |
1429 } | |
1430 | |
1431 if (thread_id < 0) { | |
1432 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1433 "Invalid thread ID", -1); | |
1434 } | |
1435 | |
1436 JavaThread* java_thread = NULL; | |
1437 if (thread_id == 0) { | |
1438 // current thread | |
1439 return os::current_thread_cpu_time(); | |
1440 } else { | |
1441 MutexLockerEx ml(Threads_lock); | |
1442 java_thread = find_java_thread_from_id(thread_id); | |
1443 if (java_thread != NULL) { | |
1444 return os::thread_cpu_time((Thread*) java_thread); | |
1445 } | |
1446 } | |
1447 return -1; | |
1448 JVM_END | |
1449 | |
1450 // Returns the CPU time consumed by a given thread (in nanoseconds). | |
1451 // If thread_id == 0, CPU time for the current thread is returned. | |
1452 // If user_sys_cpu_time = true, user level and system CPU time of | |
1453 // a given thread is returned; otherwise, only user level CPU time | |
1454 // is returned. | |
1455 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) | |
1456 if (!os::is_thread_cpu_time_supported()) { | |
1457 return -1; | |
1458 } | |
1459 | |
1460 if (thread_id < 0) { | |
1461 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1462 "Invalid thread ID", -1); | |
1463 } | |
1464 | |
1465 JavaThread* java_thread = NULL; | |
1466 if (thread_id == 0) { | |
1467 // current thread | |
1468 return os::current_thread_cpu_time(user_sys_cpu_time != 0); | |
1469 } else { | |
1470 MutexLockerEx ml(Threads_lock); | |
1471 java_thread = find_java_thread_from_id(thread_id); | |
1472 if (java_thread != NULL) { | |
1473 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); | |
1474 } | |
1475 } | |
1476 return -1; | |
1477 JVM_END | |
1478 | |
1479 // Returns a String array of all VM global flag names | |
1480 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) | |
1481 // last flag entry is always NULL, so subtract 1 | |
1482 int nFlags = (int) Flag::numFlags - 1; | |
1483 // allocate a temp array | |
1484 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
1485 nFlags, CHECK_0); | |
1486 objArrayHandle flags_ah(THREAD, r); | |
1487 int num_entries = 0; | |
1488 for (int i = 0; i < nFlags; i++) { | |
1489 Flag* flag = &Flag::flags[i]; | |
350 | 1490 // Exclude the locked (experimental, diagnostic) flags |
0 | 1491 if (flag->is_unlocked() || flag->is_unlocker()) { |
1492 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); | |
1493 flags_ah->obj_at_put(num_entries, s()); | |
1494 num_entries++; | |
1495 } | |
1496 } | |
1497 | |
1498 if (num_entries < nFlags) { | |
1499 // Return array of right length | |
1500 objArrayOop res = oopFactory::new_objArray(SystemDictionary::string_klass(), num_entries, CHECK_0); | |
1501 for(int i = 0; i < num_entries; i++) { | |
1502 res->obj_at_put(i, flags_ah->obj_at(i)); | |
1503 } | |
1504 return (jobjectArray)JNIHandles::make_local(env, res); | |
1505 } | |
1506 | |
1507 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); | |
1508 JVM_END | |
1509 | |
1510 // utility function used by jmm_GetVMGlobals | |
1511 void add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { | |
1512 Handle flag_name; | |
1513 if (name() == NULL) { | |
1514 flag_name = java_lang_String::create_from_str(flag->name, CHECK); | |
1515 } else { | |
1516 flag_name = name; | |
1517 } | |
1518 global->name = (jstring)JNIHandles::make_local(env, flag_name()); | |
1519 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; | |
1520 | |
1521 if (flag->is_bool()) { | |
1522 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; | |
1523 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; | |
1524 } else if (flag->is_intx()) { | |
1525 global->value.j = (jlong)flag->get_intx(); | |
1526 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
1527 } else if (flag->is_uintx()) { | |
1528 global->value.j = (jlong)flag->get_uintx(); | |
1529 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
1530 } else if (flag->is_ccstr()) { | |
1531 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK); | |
1532 global->value.l = (jobject)JNIHandles::make_local(env, str()); | |
1533 global->type = JMM_VMGLOBAL_TYPE_JSTRING; | |
1534 } | |
1535 | |
1536 global->writeable = flag->is_writeable(); | |
1537 global->external = flag->is_external(); | |
1538 switch (flag->origin) { | |
1539 case DEFAULT: | |
1540 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; | |
1541 break; | |
1542 case COMMAND_LINE: | |
1543 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; | |
1544 break; | |
1545 case ENVIRON_VAR: | |
1546 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; | |
1547 break; | |
1548 case CONFIG_FILE: | |
1549 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; | |
1550 break; | |
1551 case MANAGEMENT: | |
1552 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; | |
1553 break; | |
1554 case ERGONOMIC: | |
1555 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; | |
1556 break; | |
1557 default: | |
1558 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; | |
1559 } | |
1560 } | |
1561 | |
1562 // Fill globals array of count length with jmmVMGlobal entries | |
1563 // specified by names. If names == NULL, fill globals array | |
1564 // with all Flags. Return value is number of entries | |
1565 // created in globals. | |
1566 // If a Flag with a given name in an array element does not | |
1567 // exist, globals[i].name will be set to NULL. | |
1568 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, | |
1569 jobjectArray names, | |
1570 jmmVMGlobal *globals, | |
1571 jint count)) | |
1572 | |
1573 | |
1574 if (globals == NULL) { | |
1575 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1576 } | |
1577 | |
1578 ResourceMark rm(THREAD); | |
1579 | |
1580 if (names != NULL) { | |
1581 // return the requested globals | |
1582 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); | |
1583 objArrayHandle names_ah(THREAD, ta); | |
1584 // Make sure we have a String array | |
1585 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
1586 if (element_klass != SystemDictionary::string_klass()) { | |
1587 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1588 "Array element type is not String class", 0); | |
1589 } | |
1590 | |
1591 int names_length = names_ah->length(); | |
1592 int num_entries = 0; | |
1593 for (int i = 0; i < names_length && i < count; i++) { | |
1594 oop s = names_ah->obj_at(i); | |
1595 if (s == NULL) { | |
1596 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1597 } | |
1598 | |
1599 Handle sh(THREAD, s); | |
1600 char* str = java_lang_String::as_utf8_string(s); | |
1601 Flag* flag = Flag::find_flag(str, strlen(str)); | |
1602 if (flag != NULL) { | |
1603 add_global_entry(env, sh, &globals[i], flag, THREAD); | |
1604 num_entries++; | |
1605 } else { | |
1606 globals[i].name = NULL; | |
1607 } | |
1608 } | |
1609 return num_entries; | |
1610 } else { | |
1611 // return all globals if names == NULL | |
1612 | |
1613 // last flag entry is always NULL, so subtract 1 | |
1614 int nFlags = (int) Flag::numFlags - 1; | |
1615 Handle null_h; | |
1616 int num_entries = 0; | |
1617 for (int i = 0; i < nFlags && num_entries < count; i++) { | |
1618 Flag* flag = &Flag::flags[i]; | |
350 | 1619 // Exclude the locked (diagnostic, experimental) flags |
0 | 1620 if (flag->is_unlocked() || flag->is_unlocker()) { |
1621 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD); | |
1622 num_entries++; | |
1623 } | |
1624 } | |
1625 return num_entries; | |
1626 } | |
1627 JVM_END | |
1628 | |
1629 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) | |
1630 ResourceMark rm(THREAD); | |
1631 | |
1632 oop fn = JNIHandles::resolve_external_guard(flag_name); | |
1633 if (fn == NULL) { | |
1634 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
1635 "The flag name cannot be null."); | |
1636 } | |
1637 char* name = java_lang_String::as_utf8_string(fn); | |
1638 Flag* flag = Flag::find_flag(name, strlen(name)); | |
1639 if (flag == NULL) { | |
1640 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
1641 "Flag does not exist."); | |
1642 } | |
1643 if (!flag->is_writeable()) { | |
1644 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
1645 "This flag is not writeable."); | |
1646 } | |
1647 | |
1648 bool succeed; | |
1649 if (flag->is_bool()) { | |
1650 bool bvalue = (new_value.z == JNI_TRUE ? true : false); | |
1651 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); | |
1652 } else if (flag->is_intx()) { | |
1653 intx ivalue = new_value.j; | |
1654 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); | |
1655 } else if (flag->is_uintx()) { | |
1656 uintx uvalue = new_value.j; | |
1657 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); | |
1658 } else if (flag->is_ccstr()) { | |
1659 oop str = JNIHandles::resolve_external_guard(new_value.l); | |
1660 if (str == NULL) { | |
1661 THROW(vmSymbols::java_lang_NullPointerException()); | |
1662 } | |
1663 ccstr svalue = java_lang_String::as_utf8_string(str); | |
1664 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); | |
1665 } | |
1666 assert(succeed, "Setting flag should succeed"); | |
1667 JVM_END | |
1668 | |
1669 class ThreadTimesClosure: public ThreadClosure { | |
1670 private: | |
1671 objArrayOop _names; | |
1672 typeArrayOop _times; | |
1673 int _names_len; | |
1674 int _times_len; | |
1675 int _count; | |
1676 | |
1677 public: | |
1678 ThreadTimesClosure(objArrayOop names, typeArrayOop times); | |
1679 virtual void do_thread(Thread* thread); | |
1680 int count() { return _count; } | |
1681 }; | |
1682 | |
1683 ThreadTimesClosure::ThreadTimesClosure(objArrayOop names, | |
1684 typeArrayOop times) { | |
1685 assert(names != NULL, "names was NULL"); | |
1686 assert(times != NULL, "times was NULL"); | |
1687 _names = names; | |
1688 _names_len = names->length(); | |
1689 _times = times; | |
1690 _times_len = times->length(); | |
1691 _count = 0; | |
1692 } | |
1693 | |
1694 void ThreadTimesClosure::do_thread(Thread* thread) { | |
1695 Handle s; | |
1696 assert(thread != NULL, "thread was NULL"); | |
1697 | |
1698 // exclude externally visible JavaThreads | |
1699 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
1700 return; | |
1701 } | |
1702 | |
1703 if (_count >= _names_len || _count >= _times_len) { | |
1704 // skip if the result array is not big enough | |
1705 return; | |
1706 } | |
1707 | |
1708 EXCEPTION_MARK; | |
1709 | |
1710 assert(thread->name() != NULL, "All threads should have a name"); | |
1711 s = java_lang_String::create_from_str(thread->name(), CHECK); | |
1712 _names->obj_at_put(_count, s()); | |
1713 | |
1714 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? | |
1715 os::thread_cpu_time(thread) : -1); | |
1716 _count++; | |
1717 } | |
1718 | |
1719 // Fills names with VM internal thread names and times with the corresponding | |
1720 // CPU times. If names or times is NULL, a NullPointerException is thrown. | |
1721 // If the element type of names is not String, an IllegalArgumentException is | |
1722 // thrown. | |
1723 // If an array is not large enough to hold all the entries, only the entries | |
1724 // that fit will be returned. Return value is the number of VM internal | |
1725 // threads entries. | |
1726 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, | |
1727 jobjectArray names, | |
1728 jlongArray times)) | |
1729 if (names == NULL || times == NULL) { | |
1730 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1731 } | |
1732 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); | |
1733 objArrayHandle names_ah(THREAD, na); | |
1734 | |
1735 // Make sure we have a String array | |
1736 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
1737 if (element_klass != SystemDictionary::string_klass()) { | |
1738 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1739 "Array element type is not String class", 0); | |
1740 } | |
1741 | |
1742 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); | |
1743 typeArrayHandle times_ah(THREAD, ta); | |
1744 | |
1745 ThreadTimesClosure ttc(names_ah(), times_ah()); | |
1746 { | |
1747 MutexLockerEx ml(Threads_lock); | |
1748 Threads::threads_do(&ttc); | |
1749 } | |
1750 | |
1751 return ttc.count(); | |
1752 JVM_END | |
1753 | |
1754 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { | |
1755 ResourceMark rm(THREAD); | |
1756 | |
1757 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); | |
1758 VMThread::execute(&op); | |
1759 | |
1760 DeadlockCycle* deadlocks = op.result(); | |
1761 if (deadlocks == NULL) { | |
1762 // no deadlock found and return | |
1763 return Handle(); | |
1764 } | |
1765 | |
1766 int num_threads = 0; | |
1767 DeadlockCycle* cycle; | |
1768 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
1769 num_threads += cycle->num_threads(); | |
1770 } | |
1771 | |
1772 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NH); | |
1773 objArrayHandle threads_ah(THREAD, r); | |
1774 | |
1775 int index = 0; | |
1776 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
1777 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); | |
1778 int len = deadlock_threads->length(); | |
1779 for (int i = 0; i < len; i++) { | |
1780 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); | |
1781 index++; | |
1782 } | |
1783 } | |
1784 return threads_ah; | |
1785 } | |
1786 | |
1787 // Finds cycles of threads that are deadlocked involved in object monitors | |
1788 // and JSR-166 synchronizers. | |
1789 // Returns an array of Thread objects which are in deadlock, if any. | |
1790 // Otherwise, returns NULL. | |
1791 // | |
1792 // Input parameter: | |
1793 // object_monitors_only - if true, only check object monitors | |
1794 // | |
1795 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) | |
1796 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); | |
1797 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1798 JVM_END | |
1799 | |
1800 // Finds cycles of threads that are deadlocked on monitor locks | |
1801 // Returns an array of Thread objects which are in deadlock, if any. | |
1802 // Otherwise, returns NULL. | |
1803 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) | |
1804 Handle result = find_deadlocks(true, CHECK_0); | |
1805 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1806 JVM_END | |
1807 | |
1808 // Gets the information about GC extension attributes including | |
1809 // the name of the attribute, its type, and a short description. | |
1810 // | |
1811 // Input parameters: | |
1812 // mgr - GC memory manager | |
1813 // info - caller allocated array of jmmExtAttributeInfo | |
1814 // count - number of elements of the info array | |
1815 // | |
1816 // Returns the number of GC extension attributes filled in the info array; or | |
1817 // -1 if info is not big enough | |
1818 // | |
1819 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) | |
1820 // All GC memory managers have 1 attribute (number of GC threads) | |
1821 if (count == 0) { | |
1822 return 0; | |
1823 } | |
1824 | |
1825 if (info == NULL) { | |
1826 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1827 } | |
1828 | |
1829 info[0].name = "GcThreadCount"; | |
1830 info[0].type = 'I'; | |
1831 info[0].description = "Number of GC threads"; | |
1832 return 1; | |
1833 JVM_END | |
1834 | |
1835 // verify the given array is an array of java/lang/management/MemoryUsage objects | |
1836 // of a given length and return the objArrayOop | |
1837 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { | |
1838 if (array == NULL) { | |
1839 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1840 } | |
1841 | |
1842 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); | |
1843 objArrayHandle array_h(THREAD, oa); | |
1844 | |
1845 // array must be of the given length | |
1846 if (length != array_h->length()) { | |
1847 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1848 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); | |
1849 } | |
1850 | |
1851 // check if the element of array is of type MemoryUsage class | |
1852 klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); | |
1853 klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass(); | |
1854 if (element_klass != usage_klass) { | |
1855 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1856 "The element type is not MemoryUsage class", 0); | |
1857 } | |
1858 | |
1859 return array_h(); | |
1860 } | |
1861 | |
1862 // Gets the statistics of the last GC of a given GC memory manager. | |
1863 // Input parameters: | |
1864 // obj - GarbageCollectorMXBean object | |
1865 // gc_stat - caller allocated jmmGCStat where: | |
1866 // a. before_gc_usage - array of MemoryUsage objects | |
1867 // b. after_gc_usage - array of MemoryUsage objects | |
1868 // c. gc_ext_attributes_values_size is set to the | |
1869 // gc_ext_attribute_values array allocated | |
1870 // d. gc_ext_attribute_values is a caller allocated array of jvalue. | |
1871 // | |
1872 // On return, | |
1873 // gc_index == 0 indicates no GC statistics available | |
1874 // | |
1875 // before_gc_usage and after_gc_usage - filled with per memory pool | |
1876 // before and after GC usage in the same order as the memory pools | |
1877 // returned by GetMemoryPools for a given GC memory manager. | |
1878 // num_gc_ext_attributes indicates the number of elements in | |
1879 // the gc_ext_attribute_values array is filled; or | |
1880 // -1 if the gc_ext_attributes_values array is not big enough | |
1881 // | |
1882 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) | |
1883 ResourceMark rm(THREAD); | |
1884 | |
1885 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { | |
1886 THROW(vmSymbols::java_lang_NullPointerException()); | |
1887 } | |
1888 | |
1889 // Get the GCMemoryManager | |
1890 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); | |
1891 if (mgr->last_gc_stat() == NULL) { | |
1892 gc_stat->gc_index = 0; | |
1893 return; | |
1894 } | |
1895 | |
1896 // Make a copy of the last GC statistics | |
1897 // GC may occur while constructing the last GC information | |
1898 int num_pools = MemoryService::num_memory_pools(); | |
1899 GCStatInfo* stat = new GCStatInfo(num_pools); | |
1900 stat->copy_stat(mgr->last_gc_stat()); | |
1901 | |
1902 gc_stat->gc_index = stat->gc_index(); | |
1903 gc_stat->start_time = Management::ticks_to_ms(stat->start_time()); | |
1904 gc_stat->end_time = Management::ticks_to_ms(stat->end_time()); | |
1905 | |
1906 // Current implementation does not have GC extension attributes | |
1907 gc_stat->num_gc_ext_attributes = 0; | |
1908 | |
1909 // Fill the arrays of MemoryUsage objects with before and after GC | |
1910 // per pool memory usage | |
1911 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, | |
1912 num_pools, | |
1913 CHECK); | |
1914 objArrayHandle usage_before_gc_ah(THREAD, bu); | |
1915 | |
1916 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, | |
1917 num_pools, | |
1918 CHECK); | |
1919 objArrayHandle usage_after_gc_ah(THREAD, au); | |
1920 | |
1921 for (int i = 0; i < num_pools; i++) { | |
1922 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK); | |
1923 Handle after_usage; | |
1924 | |
1925 MemoryUsage u = stat->after_gc_usage_for_pool(i); | |
1926 if (u.max_size() == 0 && u.used() > 0) { | |
1927 // If max size == 0, this pool is a survivor space. | |
1928 // Set max size = -1 since the pools will be swapped after GC. | |
1929 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); | |
1930 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); | |
1931 } else { | |
1932 after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK); | |
1933 } | |
1934 usage_before_gc_ah->obj_at_put(i, before_usage()); | |
1935 usage_after_gc_ah->obj_at_put(i, after_usage()); | |
1936 } | |
1937 | |
1938 if (gc_stat->gc_ext_attribute_values_size > 0) { | |
1939 // Current implementation only has 1 attribute (number of GC threads) | |
1940 // The type is 'I' | |
1941 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); | |
1942 } | |
1943 JVM_END | |
1944 | |
1945 // Dump heap - Returns 0 if succeeds. | |
1946 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) | |
1947 #ifndef SERVICES_KERNEL | |
1948 ResourceMark rm(THREAD); | |
1949 oop on = JNIHandles::resolve_external_guard(outputfile); | |
1950 if (on == NULL) { | |
1951 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
1952 "Output file name cannot be null.", -1); | |
1953 } | |
1954 char* name = java_lang_String::as_utf8_string(on); | |
1955 if (name == NULL) { | |
1956 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
1957 "Output file name cannot be null.", -1); | |
1958 } | |
1959 HeapDumper dumper(live ? true : false); | |
1960 if (dumper.dump(name) != 0) { | |
1961 const char* errmsg = dumper.error_as_C_string(); | |
1962 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); | |
1963 } | |
1964 return 0; | |
1965 #else // SERVICES_KERNEL | |
1966 return -1; | |
1967 #endif // SERVICES_KERNEL | |
1968 JVM_END | |
1969 | |
1970 jlong Management::ticks_to_ms(jlong ticks) { | |
1971 assert(os::elapsed_frequency() > 0, "Must be non-zero"); | |
1972 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) | |
1973 * (double)1000.0); | |
1974 } | |
1975 | |
1976 const struct jmmInterface_1_ jmm_interface = { | |
1977 NULL, | |
1978 NULL, | |
1979 jmm_GetVersion, | |
1980 jmm_GetOptionalSupport, | |
1981 jmm_GetInputArguments, | |
1982 jmm_GetThreadInfo, | |
1983 jmm_GetInputArgumentArray, | |
1984 jmm_GetMemoryPools, | |
1985 jmm_GetMemoryManagers, | |
1986 jmm_GetMemoryPoolUsage, | |
1987 jmm_GetPeakMemoryPoolUsage, | |
1988 NULL, | |
1989 jmm_GetMemoryUsage, | |
1990 jmm_GetLongAttribute, | |
1991 jmm_GetBoolAttribute, | |
1992 jmm_SetBoolAttribute, | |
1993 jmm_GetLongAttributes, | |
1994 jmm_FindMonitorDeadlockedThreads, | |
1995 jmm_GetThreadCpuTime, | |
1996 jmm_GetVMGlobalNames, | |
1997 jmm_GetVMGlobals, | |
1998 jmm_GetInternalThreadTimes, | |
1999 jmm_ResetStatistic, | |
2000 jmm_SetPoolSensor, | |
2001 jmm_SetPoolThreshold, | |
2002 jmm_GetPoolCollectionUsage, | |
2003 jmm_GetGCExtAttributeInfo, | |
2004 jmm_GetLastGCStat, | |
2005 jmm_GetThreadCpuTimeWithKind, | |
2006 NULL, | |
2007 jmm_DumpHeap0, | |
2008 jmm_FindDeadlockedThreads, | |
2009 jmm_SetVMGlobal, | |
2010 NULL, | |
2011 jmm_DumpThreads | |
2012 }; | |
2013 | |
2014 void* Management::get_jmm_interface(int version) { | |
2015 if (version == JMM_VERSION_1_0) { | |
2016 return (void*) &jmm_interface; | |
2017 } | |
2018 return NULL; | |
2019 } |