Mercurial > hg > truffle
annotate src/share/vm/services/management.cpp @ 2004:4da76e32c0be
7002666: eclipse CDT projects crash with compressed oops
Reviewed-by: kvn, twisti
author | never |
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date | Wed, 01 Dec 2010 10:16:31 -0800 |
parents | f95d63e2154a |
children | b1a2afa37ec4 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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/klassOop.hpp" | |
33 #include "oops/objArrayKlass.hpp" | |
34 #include "oops/oop.inline.hpp" | |
35 #include "runtime/arguments.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 "services/classLoadingService.hpp" | |
42 #include "services/heapDumper.hpp" | |
43 #include "services/lowMemoryDetector.hpp" | |
44 #include "services/management.hpp" | |
45 #include "services/memoryManager.hpp" | |
46 #include "services/memoryPool.hpp" | |
47 #include "services/memoryService.hpp" | |
48 #include "services/runtimeService.hpp" | |
49 #include "services/threadService.hpp" | |
0 | 50 |
51 PerfVariable* Management::_begin_vm_creation_time = NULL; | |
52 PerfVariable* Management::_end_vm_creation_time = NULL; | |
53 PerfVariable* Management::_vm_init_done_time = NULL; | |
54 | |
55 klassOop Management::_sensor_klass = NULL; | |
56 klassOop Management::_threadInfo_klass = NULL; | |
57 klassOop Management::_memoryUsage_klass = NULL; | |
58 klassOop Management::_memoryPoolMXBean_klass = NULL; | |
59 klassOop Management::_memoryManagerMXBean_klass = NULL; | |
60 klassOop Management::_garbageCollectorMXBean_klass = NULL; | |
61 klassOop Management::_managementFactory_klass = NULL; | |
62 | |
63 jmmOptionalSupport Management::_optional_support = {0}; | |
64 TimeStamp Management::_stamp; | |
65 | |
66 void management_init() { | |
67 Management::init(); | |
68 ThreadService::init(); | |
69 RuntimeService::init(); | |
70 ClassLoadingService::init(); | |
71 } | |
72 | |
73 void Management::init() { | |
74 EXCEPTION_MARK; | |
75 | |
76 // These counters are for java.lang.management API support. | |
77 // They are created even if -XX:-UsePerfData is set and in | |
78 // that case, they will be allocated on C heap. | |
79 | |
80 _begin_vm_creation_time = | |
81 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", | |
82 PerfData::U_None, CHECK); | |
83 | |
84 _end_vm_creation_time = | |
85 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", | |
86 PerfData::U_None, CHECK); | |
87 | |
88 _vm_init_done_time = | |
89 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", | |
90 PerfData::U_None, CHECK); | |
91 | |
92 // Initialize optional support | |
93 _optional_support.isLowMemoryDetectionSupported = 1; | |
94 _optional_support.isCompilationTimeMonitoringSupported = 1; | |
95 _optional_support.isThreadContentionMonitoringSupported = 1; | |
96 | |
97 if (os::is_thread_cpu_time_supported()) { | |
98 _optional_support.isCurrentThreadCpuTimeSupported = 1; | |
99 _optional_support.isOtherThreadCpuTimeSupported = 1; | |
100 } else { | |
101 _optional_support.isCurrentThreadCpuTimeSupported = 0; | |
102 _optional_support.isOtherThreadCpuTimeSupported = 0; | |
103 } | |
104 _optional_support.isBootClassPathSupported = 1; | |
105 _optional_support.isObjectMonitorUsageSupported = 1; | |
106 #ifndef SERVICES_KERNEL | |
107 // This depends on the heap inspector | |
108 _optional_support.isSynchronizerUsageSupported = 1; | |
109 #endif // SERVICES_KERNEL | |
110 } | |
111 | |
112 void Management::initialize(TRAPS) { | |
113 // Start the low memory detector thread | |
114 LowMemoryDetector::initialize(); | |
115 | |
116 if (ManagementServer) { | |
117 ResourceMark rm(THREAD); | |
118 HandleMark hm(THREAD); | |
119 | |
120 // Load and initialize the sun.management.Agent class | |
121 // invoke startAgent method to start the management server | |
122 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
123 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::sun_management_Agent(), | |
124 loader, | |
125 Handle(), | |
126 true, | |
127 CHECK); | |
128 instanceKlassHandle ik (THREAD, k); | |
129 | |
130 JavaValue result(T_VOID); | |
131 JavaCalls::call_static(&result, | |
132 ik, | |
133 vmSymbolHandles::startAgent_name(), | |
134 vmSymbolHandles::void_method_signature(), | |
135 CHECK); | |
136 } | |
137 } | |
138 | |
139 void Management::get_optional_support(jmmOptionalSupport* support) { | |
140 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); | |
141 } | |
142 | |
143 klassOop Management::load_and_initialize_klass(symbolHandle sh, TRAPS) { | |
144 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); | |
145 instanceKlassHandle ik (THREAD, k); | |
146 if (ik->should_be_initialized()) { | |
147 ik->initialize(CHECK_NULL); | |
148 } | |
149 return ik(); | |
150 } | |
151 | |
152 void Management::record_vm_startup_time(jlong begin, jlong duration) { | |
153 // if the performance counter is not initialized, | |
154 // then vm initialization failed; simply return. | |
155 if (_begin_vm_creation_time == NULL) return; | |
156 | |
157 _begin_vm_creation_time->set_value(begin); | |
158 _end_vm_creation_time->set_value(begin + duration); | |
159 PerfMemory::set_accessible(true); | |
160 } | |
161 | |
162 jlong Management::timestamp() { | |
163 TimeStamp t; | |
164 t.update(); | |
165 return t.ticks() - _stamp.ticks(); | |
166 } | |
167 | |
168 void Management::oops_do(OopClosure* f) { | |
169 MemoryService::oops_do(f); | |
170 ThreadService::oops_do(f); | |
171 | |
172 f->do_oop((oop*) &_sensor_klass); | |
173 f->do_oop((oop*) &_threadInfo_klass); | |
174 f->do_oop((oop*) &_memoryUsage_klass); | |
175 f->do_oop((oop*) &_memoryPoolMXBean_klass); | |
176 f->do_oop((oop*) &_memoryManagerMXBean_klass); | |
177 f->do_oop((oop*) &_garbageCollectorMXBean_klass); | |
178 f->do_oop((oop*) &_managementFactory_klass); | |
179 } | |
180 | |
181 klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { | |
182 if (_threadInfo_klass == NULL) { | |
183 _threadInfo_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_ThreadInfo(), CHECK_NULL); | |
184 } | |
185 return _threadInfo_klass; | |
186 } | |
187 | |
188 klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) { | |
189 if (_memoryUsage_klass == NULL) { | |
190 _memoryUsage_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryUsage(), CHECK_NULL); | |
191 } | |
192 return _memoryUsage_klass; | |
193 } | |
194 | |
195 klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { | |
196 if (_memoryPoolMXBean_klass == NULL) { | |
197 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); | |
198 } | |
199 return _memoryPoolMXBean_klass; | |
200 } | |
201 | |
202 klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { | |
203 if (_memoryManagerMXBean_klass == NULL) { | |
204 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); | |
205 } | |
206 return _memoryManagerMXBean_klass; | |
207 } | |
208 | |
209 klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { | |
210 if (_garbageCollectorMXBean_klass == NULL) { | |
211 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); | |
212 } | |
213 return _garbageCollectorMXBean_klass; | |
214 } | |
215 | |
216 klassOop Management::sun_management_Sensor_klass(TRAPS) { | |
217 if (_sensor_klass == NULL) { | |
218 _sensor_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_Sensor(), CHECK_NULL); | |
219 } | |
220 return _sensor_klass; | |
221 } | |
222 | |
223 klassOop Management::sun_management_ManagementFactory_klass(TRAPS) { | |
224 if (_managementFactory_klass == NULL) { | |
225 _managementFactory_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_ManagementFactory(), CHECK_NULL); | |
226 } | |
227 return _managementFactory_klass; | |
228 } | |
229 | |
230 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { | |
231 Handle snapshot_thread(THREAD, snapshot->threadObj()); | |
232 | |
233 jlong contended_time; | |
234 jlong waited_time; | |
235 if (ThreadService::is_thread_monitoring_contention()) { | |
236 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); | |
237 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); | |
238 } else { | |
239 // set them to -1 if thread contention monitoring is disabled. | |
240 contended_time = max_julong; | |
241 waited_time = max_julong; | |
242 } | |
243 | |
244 int thread_status = snapshot->thread_status(); | |
245 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); | |
246 if (snapshot->is_ext_suspended()) { | |
247 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; | |
248 } | |
249 if (snapshot->is_in_native()) { | |
250 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; | |
251 } | |
252 | |
253 ThreadStackTrace* st = snapshot->get_stack_trace(); | |
254 Handle stacktrace_h; | |
255 if (st != NULL) { | |
256 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); | |
257 } else { | |
258 stacktrace_h = Handle(); | |
259 } | |
260 | |
261 args->push_oop(snapshot_thread); | |
262 args->push_int(thread_status); | |
263 args->push_oop(Handle(THREAD, snapshot->blocker_object())); | |
264 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); | |
265 args->push_long(snapshot->contended_enter_count()); | |
266 args->push_long(contended_time); | |
267 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); | |
268 args->push_long(waited_time); | |
269 args->push_oop(stacktrace_h); | |
270 } | |
271 | |
272 // Helper function to construct a ThreadInfo object | |
273 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { | |
274 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
275 instanceKlassHandle ik (THREAD, k); | |
276 | |
277 JavaValue result(T_VOID); | |
278 JavaCallArguments args(14); | |
279 | |
280 // First allocate a ThreadObj object and | |
281 // push the receiver as the first argument | |
282 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
283 args.push_oop(element); | |
284 | |
285 // initialize the arguments for the ThreadInfo constructor | |
286 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
287 | |
288 // Call ThreadInfo constructor with no locked monitors and synchronizers | |
289 JavaCalls::call_special(&result, | |
290 ik, | |
291 vmSymbolHandles::object_initializer_name(), | |
292 vmSymbolHandles::java_lang_management_ThreadInfo_constructor_signature(), | |
293 &args, | |
294 CHECK_NULL); | |
295 | |
296 return (instanceOop) element(); | |
297 } | |
298 | |
299 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, | |
300 objArrayHandle monitors_array, | |
301 typeArrayHandle depths_array, | |
302 objArrayHandle synchronizers_array, | |
303 TRAPS) { | |
304 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
305 instanceKlassHandle ik (THREAD, k); | |
306 | |
307 JavaValue result(T_VOID); | |
308 JavaCallArguments args(17); | |
309 | |
310 // First allocate a ThreadObj object and | |
311 // push the receiver as the first argument | |
312 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
313 args.push_oop(element); | |
314 | |
315 // initialize the arguments for the ThreadInfo constructor | |
316 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
317 | |
318 // push the locked monitors and synchronizers in the arguments | |
319 args.push_oop(monitors_array); | |
320 args.push_oop(depths_array); | |
321 args.push_oop(synchronizers_array); | |
322 | |
323 // Call ThreadInfo constructor with locked monitors and synchronizers | |
324 JavaCalls::call_special(&result, | |
325 ik, | |
326 vmSymbolHandles::object_initializer_name(), | |
327 vmSymbolHandles::java_lang_management_ThreadInfo_with_locks_constructor_signature(), | |
328 &args, | |
329 CHECK_NULL); | |
330 | |
331 return (instanceOop) element(); | |
332 } | |
333 | |
334 // Helper functions | |
335 static JavaThread* find_java_thread_from_id(jlong thread_id) { | |
336 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); | |
337 | |
338 JavaThread* java_thread = NULL; | |
339 // Sequential search for now. Need to do better optimization later. | |
340 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
341 oop tobj = thread->threadObj(); | |
342 if (!thread->is_exiting() && | |
343 tobj != NULL && | |
344 thread_id == java_lang_Thread::thread_id(tobj)) { | |
345 java_thread = thread; | |
346 break; | |
347 } | |
348 } | |
349 return java_thread; | |
350 } | |
351 | |
352 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { | |
353 if (mgr == NULL) { | |
354 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
355 } | |
356 oop mgr_obj = JNIHandles::resolve(mgr); | |
357 instanceHandle h(THREAD, (instanceOop) mgr_obj); | |
358 | |
359 klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); | |
360 if (!h->is_a(k)) { | |
361 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
362 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", | |
363 NULL); | |
364 } | |
365 | |
366 MemoryManager* gc = MemoryService::get_memory_manager(h); | |
367 if (gc == NULL || !gc->is_gc_memory_manager()) { | |
368 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
369 "Invalid GC memory manager", | |
370 NULL); | |
371 } | |
372 return (GCMemoryManager*) gc; | |
373 } | |
374 | |
375 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { | |
376 if (obj == NULL) { | |
377 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
378 } | |
379 | |
380 oop pool_obj = JNIHandles::resolve(obj); | |
381 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
382 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
383 | |
384 return MemoryService::get_memory_pool(ph); | |
385 } | |
386 | |
387 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { | |
388 int num_threads = ids_ah->length(); | |
389 // should be non-empty array | |
390 if (num_threads == 0) { | |
391 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
392 "Empty array of thread IDs"); | |
393 } | |
394 | |
395 // Validate input thread IDs | |
396 int i = 0; | |
397 for (i = 0; i < num_threads; i++) { | |
398 jlong tid = ids_ah->long_at(i); | |
399 if (tid <= 0) { | |
400 // throw exception if invalid thread id. | |
401 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
402 "Invalid thread ID entry"); | |
403 } | |
404 } | |
405 | |
406 } | |
407 | |
408 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { | |
409 | |
410 // check if the element of infoArray is of type ThreadInfo class | |
411 klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); | |
412 klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass(); | |
413 if (element_klass != threadinfo_klass) { | |
414 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
415 "infoArray element type is not ThreadInfo class"); | |
416 } | |
417 | |
418 } | |
419 | |
420 | |
421 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { | |
422 if (obj == NULL) { | |
423 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
424 } | |
425 | |
426 oop mgr_obj = JNIHandles::resolve(obj); | |
427 assert(mgr_obj->is_instance(), "Should be an instanceOop"); | |
428 instanceHandle mh(THREAD, (instanceOop) mgr_obj); | |
429 | |
430 return MemoryService::get_memory_manager(mh); | |
431 } | |
432 | |
433 // Returns a version string and sets major and minor version if | |
434 // the input parameters are non-null. | |
435 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) | |
436 return JMM_VERSION; | |
437 JVM_END | |
438 | |
439 // Gets the list of VM monitoring and management optional supports | |
440 // Returns 0 if succeeded; otherwise returns non-zero. | |
441 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) | |
442 if (support == NULL) { | |
443 return -1; | |
444 } | |
445 Management::get_optional_support(support); | |
446 return 0; | |
447 JVM_END | |
448 | |
449 // Returns a java.lang.String object containing the input arguments to the VM. | |
450 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) | |
451 ResourceMark rm(THREAD); | |
452 | |
453 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
454 return NULL; | |
455 } | |
456 | |
457 char** vm_flags = Arguments::jvm_flags_array(); | |
458 char** vm_args = Arguments::jvm_args_array(); | |
459 int num_flags = Arguments::num_jvm_flags(); | |
460 int num_args = Arguments::num_jvm_args(); | |
461 | |
462 size_t length = 1; // null terminator | |
463 int i; | |
464 for (i = 0; i < num_flags; i++) { | |
465 length += strlen(vm_flags[i]); | |
466 } | |
467 for (i = 0; i < num_args; i++) { | |
468 length += strlen(vm_args[i]); | |
469 } | |
470 // add a space between each argument | |
471 length += num_flags + num_args - 1; | |
472 | |
473 // Return the list of input arguments passed to the VM | |
474 // and preserve the order that the VM processes. | |
475 char* args = NEW_RESOURCE_ARRAY(char, length); | |
476 args[0] = '\0'; | |
477 // concatenate all jvm_flags | |
478 if (num_flags > 0) { | |
479 strcat(args, vm_flags[0]); | |
480 for (i = 1; i < num_flags; i++) { | |
481 strcat(args, " "); | |
482 strcat(args, vm_flags[i]); | |
483 } | |
484 } | |
485 | |
486 if (num_args > 0 && num_flags > 0) { | |
487 // append a space if args already contains one or more jvm_flags | |
488 strcat(args, " "); | |
489 } | |
490 | |
491 // concatenate all jvm_args | |
492 if (num_args > 0) { | |
493 strcat(args, vm_args[0]); | |
494 for (i = 1; i < num_args; i++) { | |
495 strcat(args, " "); | |
496 strcat(args, vm_args[i]); | |
497 } | |
498 } | |
499 | |
500 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); | |
501 return JNIHandles::make_local(env, hargs()); | |
502 JVM_END | |
503 | |
504 // Returns an array of java.lang.String object containing the input arguments to the VM. | |
505 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) | |
506 ResourceMark rm(THREAD); | |
507 | |
508 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
509 return NULL; | |
510 } | |
511 | |
512 char** vm_flags = Arguments::jvm_flags_array(); | |
513 char** vm_args = Arguments::jvm_args_array(); | |
514 int num_flags = Arguments::num_jvm_flags(); | |
515 int num_args = Arguments::num_jvm_args(); | |
516 | |
1142 | 517 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); |
0 | 518 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); |
519 objArrayHandle result_h(THREAD, r); | |
520 | |
521 int index = 0; | |
522 for (int j = 0; j < num_flags; j++, index++) { | |
523 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); | |
524 result_h->obj_at_put(index, h()); | |
525 } | |
526 for (int i = 0; i < num_args; i++, index++) { | |
527 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); | |
528 result_h->obj_at_put(index, h()); | |
529 } | |
530 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
531 JVM_END | |
532 | |
533 // Returns an array of java/lang/management/MemoryPoolMXBean object | |
534 // one for each memory pool if obj == null; otherwise returns | |
535 // an array of memory pools for a given memory manager if | |
536 // it is a valid memory manager. | |
537 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) | |
538 ResourceMark rm(THREAD); | |
539 | |
540 int num_memory_pools; | |
541 MemoryManager* mgr = NULL; | |
542 if (obj == NULL) { | |
543 num_memory_pools = MemoryService::num_memory_pools(); | |
544 } else { | |
545 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); | |
546 if (mgr == NULL) { | |
547 return NULL; | |
548 } | |
549 num_memory_pools = mgr->num_memory_pools(); | |
550 } | |
551 | |
552 // Allocate the resulting MemoryPoolMXBean[] object | |
553 klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); | |
554 instanceKlassHandle ik (THREAD, k); | |
555 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); | |
556 objArrayHandle poolArray(THREAD, r); | |
557 | |
558 if (mgr == NULL) { | |
559 // Get all memory pools | |
560 for (int i = 0; i < num_memory_pools; i++) { | |
561 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
562 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
563 instanceHandle ph(THREAD, p); | |
564 poolArray->obj_at_put(i, ph()); | |
565 } | |
566 } else { | |
567 // Get memory pools managed by a given memory manager | |
568 for (int i = 0; i < num_memory_pools; i++) { | |
569 MemoryPool* pool = mgr->get_memory_pool(i); | |
570 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
571 instanceHandle ph(THREAD, p); | |
572 poolArray->obj_at_put(i, ph()); | |
573 } | |
574 } | |
575 return (jobjectArray) JNIHandles::make_local(env, poolArray()); | |
576 JVM_END | |
577 | |
578 // Returns an array of java/lang/management/MemoryManagerMXBean object | |
579 // one for each memory manager if obj == null; otherwise returns | |
580 // an array of memory managers for a given memory pool if | |
581 // it is a valid memory pool. | |
582 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) | |
583 ResourceMark rm(THREAD); | |
584 | |
585 int num_mgrs; | |
586 MemoryPool* pool = NULL; | |
587 if (obj == NULL) { | |
588 num_mgrs = MemoryService::num_memory_managers(); | |
589 } else { | |
590 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
591 if (pool == NULL) { | |
592 return NULL; | |
593 } | |
594 num_mgrs = pool->num_memory_managers(); | |
595 } | |
596 | |
597 // Allocate the resulting MemoryManagerMXBean[] object | |
598 klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); | |
599 instanceKlassHandle ik (THREAD, k); | |
600 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); | |
601 objArrayHandle mgrArray(THREAD, r); | |
602 | |
603 if (pool == NULL) { | |
604 // Get all memory managers | |
605 for (int i = 0; i < num_mgrs; i++) { | |
606 MemoryManager* mgr = MemoryService::get_memory_manager(i); | |
607 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
608 instanceHandle ph(THREAD, p); | |
609 mgrArray->obj_at_put(i, ph()); | |
610 } | |
611 } else { | |
612 // Get memory managers for a given memory pool | |
613 for (int i = 0; i < num_mgrs; i++) { | |
614 MemoryManager* mgr = pool->get_memory_manager(i); | |
615 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
616 instanceHandle ph(THREAD, p); | |
617 mgrArray->obj_at_put(i, ph()); | |
618 } | |
619 } | |
620 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); | |
621 JVM_END | |
622 | |
623 | |
624 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
625 // of a given memory pool. | |
626 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
627 ResourceMark rm(THREAD); | |
628 | |
629 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
630 if (pool != NULL) { | |
631 MemoryUsage usage = pool->get_memory_usage(); | |
632 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
633 return JNIHandles::make_local(env, h()); | |
634 } else { | |
635 return NULL; | |
636 } | |
637 JVM_END | |
638 | |
639 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
640 // of a given memory pool. | |
641 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
642 ResourceMark rm(THREAD); | |
643 | |
644 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
645 if (pool != NULL) { | |
646 MemoryUsage usage = pool->get_peak_memory_usage(); | |
647 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
648 return JNIHandles::make_local(env, h()); | |
649 } else { | |
650 return NULL; | |
651 } | |
652 JVM_END | |
653 | |
654 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
655 // of a given memory pool after most recent GC. | |
656 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) | |
657 ResourceMark rm(THREAD); | |
658 | |
659 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
660 if (pool != NULL && pool->is_collected_pool()) { | |
661 MemoryUsage usage = pool->get_last_collection_usage(); | |
662 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
663 return JNIHandles::make_local(env, h()); | |
664 } else { | |
665 return NULL; | |
666 } | |
667 JVM_END | |
668 | |
669 // Sets the memory pool sensor for a threshold type | |
670 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) | |
671 if (obj == NULL || sensorObj == NULL) { | |
672 THROW(vmSymbols::java_lang_NullPointerException()); | |
673 } | |
674 | |
675 klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK); | |
676 oop s = JNIHandles::resolve(sensorObj); | |
677 assert(s->is_instance(), "Sensor should be an instanceOop"); | |
678 instanceHandle sensor_h(THREAD, (instanceOop) s); | |
679 if (!sensor_h->is_a(sensor_klass)) { | |
680 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
681 "Sensor is not an instance of sun.management.Sensor class"); | |
682 } | |
683 | |
684 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); | |
685 assert(mpool != NULL, "MemoryPool should exist"); | |
686 | |
687 switch (type) { | |
688 case JMM_USAGE_THRESHOLD_HIGH: | |
689 case JMM_USAGE_THRESHOLD_LOW: | |
690 // have only one sensor for threshold high and low | |
691 mpool->set_usage_sensor_obj(sensor_h); | |
692 break; | |
693 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
694 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
695 // have only one sensor for threshold high and low | |
696 mpool->set_gc_usage_sensor_obj(sensor_h); | |
697 break; | |
698 default: | |
699 assert(false, "Unrecognized type"); | |
700 } | |
701 | |
702 JVM_END | |
703 | |
704 | |
705 // Sets the threshold of a given memory pool. | |
706 // Returns the previous threshold. | |
707 // | |
708 // Input parameters: | |
709 // pool - the MemoryPoolMXBean object | |
710 // type - threshold type | |
711 // threshold - the new threshold (must not be negative) | |
712 // | |
713 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) | |
714 if (threshold < 0) { | |
715 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
716 "Invalid threshold value", | |
717 -1); | |
718 } | |
719 | |
489
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720 if ((size_t)threshold > max_uintx) { |
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721 stringStream st; |
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722 st.print("Invalid valid threshold value. Threshold value (" UINT64_FORMAT ") > max value of size_t (" SIZE_FORMAT ")", (size_t)threshold, max_uintx); |
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723 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); |
0 | 724 } |
725 | |
726 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); | |
727 assert(pool != NULL, "MemoryPool should exist"); | |
728 | |
729 jlong prev = 0; | |
730 switch (type) { | |
731 case JMM_USAGE_THRESHOLD_HIGH: | |
732 if (!pool->usage_threshold()->is_high_threshold_supported()) { | |
733 return -1; | |
734 } | |
735 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); | |
736 break; | |
737 | |
738 case JMM_USAGE_THRESHOLD_LOW: | |
739 if (!pool->usage_threshold()->is_low_threshold_supported()) { | |
740 return -1; | |
741 } | |
742 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); | |
743 break; | |
744 | |
745 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
746 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { | |
747 return -1; | |
748 } | |
749 // return and the new threshold is effective for the next GC | |
750 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); | |
751 | |
752 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
753 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { | |
754 return -1; | |
755 } | |
756 // return and the new threshold is effective for the next GC | |
757 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); | |
758 | |
759 default: | |
760 assert(false, "Unrecognized type"); | |
761 return -1; | |
762 } | |
763 | |
764 // When the threshold is changed, reevaluate if the low memory | |
765 // detection is enabled. | |
766 if (prev != threshold) { | |
767 LowMemoryDetector::recompute_enabled_for_collected_pools(); | |
768 LowMemoryDetector::detect_low_memory(pool); | |
769 } | |
770 return prev; | |
771 JVM_END | |
772 | |
773 // Returns a java/lang/management/MemoryUsage object representing | |
774 // the memory usage for the heap or non-heap memory. | |
775 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) | |
776 ResourceMark rm(THREAD); | |
777 | |
778 // Calculate the memory usage | |
779 size_t total_init = 0; | |
780 size_t total_used = 0; | |
781 size_t total_committed = 0; | |
782 size_t total_max = 0; | |
783 bool has_undefined_init_size = false; | |
784 bool has_undefined_max_size = false; | |
785 | |
786 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { | |
787 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
788 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { | |
789 MemoryUsage u = pool->get_memory_usage(); | |
790 total_used += u.used(); | |
791 total_committed += u.committed(); | |
792 | |
793 // if any one of the memory pool has undefined init_size or max_size, | |
794 // set it to -1 | |
795 if (u.init_size() == (size_t)-1) { | |
796 has_undefined_init_size = true; | |
797 } | |
798 if (!has_undefined_init_size) { | |
799 total_init += u.init_size(); | |
800 } | |
801 | |
802 if (u.max_size() == (size_t)-1) { | |
803 has_undefined_max_size = true; | |
804 } | |
805 if (!has_undefined_max_size) { | |
806 total_max += u.max_size(); | |
807 } | |
808 } | |
809 } | |
810 | |
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811 // In our current implementation, we make sure that all non-heap |
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812 // pools have defined init and max sizes. Heap pools do not matter, |
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813 // as we never use total_init and total_max for them. |
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814 assert(heap || !has_undefined_init_size, "Undefined init size"); |
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815 assert(heap || !has_undefined_max_size, "Undefined max size"); |
0 | 816 |
1064 | 817 MemoryUsage usage((heap ? InitialHeapSize : total_init), |
0 | 818 total_used, |
819 total_committed, | |
820 (heap ? Universe::heap()->max_capacity() : total_max)); | |
821 | |
822 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
823 return JNIHandles::make_local(env, obj()); | |
824 JVM_END | |
825 | |
826 // Returns the boolean value of a given attribute. | |
827 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) | |
828 switch (att) { | |
829 case JMM_VERBOSE_GC: | |
830 return MemoryService::get_verbose(); | |
831 case JMM_VERBOSE_CLASS: | |
832 return ClassLoadingService::get_verbose(); | |
833 case JMM_THREAD_CONTENTION_MONITORING: | |
834 return ThreadService::is_thread_monitoring_contention(); | |
835 case JMM_THREAD_CPU_TIME: | |
836 return ThreadService::is_thread_cpu_time_enabled(); | |
837 default: | |
838 assert(0, "Unrecognized attribute"); | |
839 return false; | |
840 } | |
841 JVM_END | |
842 | |
843 // Sets the given boolean attribute and returns the previous value. | |
844 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) | |
845 switch (att) { | |
846 case JMM_VERBOSE_GC: | |
847 return MemoryService::set_verbose(flag != 0); | |
848 case JMM_VERBOSE_CLASS: | |
849 return ClassLoadingService::set_verbose(flag != 0); | |
850 case JMM_THREAD_CONTENTION_MONITORING: | |
851 return ThreadService::set_thread_monitoring_contention(flag != 0); | |
852 case JMM_THREAD_CPU_TIME: | |
853 return ThreadService::set_thread_cpu_time_enabled(flag != 0); | |
854 default: | |
855 assert(0, "Unrecognized attribute"); | |
856 return false; | |
857 } | |
858 JVM_END | |
859 | |
860 | |
861 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { | |
862 switch (att) { | |
863 case JMM_GC_TIME_MS: | |
864 return mgr->gc_time_ms(); | |
865 | |
866 case JMM_GC_COUNT: | |
867 return mgr->gc_count(); | |
868 | |
869 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: | |
870 // current implementation only has 1 ext attribute | |
871 return 1; | |
872 | |
873 default: | |
874 assert(0, "Unrecognized GC attribute"); | |
875 return -1; | |
876 } | |
877 } | |
878 | |
879 class VmThreadCountClosure: public ThreadClosure { | |
880 private: | |
881 int _count; | |
882 public: | |
883 VmThreadCountClosure() : _count(0) {}; | |
884 void do_thread(Thread* thread); | |
885 int count() { return _count; } | |
886 }; | |
887 | |
888 void VmThreadCountClosure::do_thread(Thread* thread) { | |
889 // exclude externally visible JavaThreads | |
890 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
891 return; | |
892 } | |
893 | |
894 _count++; | |
895 } | |
896 | |
897 static jint get_vm_thread_count() { | |
898 VmThreadCountClosure vmtcc; | |
899 { | |
900 MutexLockerEx ml(Threads_lock); | |
901 Threads::threads_do(&vmtcc); | |
902 } | |
903 | |
904 return vmtcc.count(); | |
905 } | |
906 | |
907 static jint get_num_flags() { | |
908 // last flag entry is always NULL, so subtract 1 | |
909 int nFlags = (int) Flag::numFlags - 1; | |
910 int count = 0; | |
911 for (int i = 0; i < nFlags; i++) { | |
912 Flag* flag = &Flag::flags[i]; | |
350 | 913 // Exclude the locked (diagnostic, experimental) flags |
0 | 914 if (flag->is_unlocked() || flag->is_unlocker()) { |
915 count++; | |
916 } | |
917 } | |
918 return count; | |
919 } | |
920 | |
921 static jlong get_long_attribute(jmmLongAttribute att) { | |
922 switch (att) { | |
923 case JMM_CLASS_LOADED_COUNT: | |
924 return ClassLoadingService::loaded_class_count(); | |
925 | |
926 case JMM_CLASS_UNLOADED_COUNT: | |
927 return ClassLoadingService::unloaded_class_count(); | |
928 | |
929 case JMM_THREAD_TOTAL_COUNT: | |
930 return ThreadService::get_total_thread_count(); | |
931 | |
932 case JMM_THREAD_LIVE_COUNT: | |
933 return ThreadService::get_live_thread_count(); | |
934 | |
935 case JMM_THREAD_PEAK_COUNT: | |
936 return ThreadService::get_peak_thread_count(); | |
937 | |
938 case JMM_THREAD_DAEMON_COUNT: | |
939 return ThreadService::get_daemon_thread_count(); | |
940 | |
941 case JMM_JVM_INIT_DONE_TIME_MS: | |
942 return Management::vm_init_done_time(); | |
943 | |
944 case JMM_COMPILE_TOTAL_TIME_MS: | |
945 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); | |
946 | |
947 case JMM_OS_PROCESS_ID: | |
948 return os::current_process_id(); | |
949 | |
950 // Hotspot-specific counters | |
951 case JMM_CLASS_LOADED_BYTES: | |
952 return ClassLoadingService::loaded_class_bytes(); | |
953 | |
954 case JMM_CLASS_UNLOADED_BYTES: | |
955 return ClassLoadingService::unloaded_class_bytes(); | |
956 | |
957 case JMM_SHARED_CLASS_LOADED_COUNT: | |
958 return ClassLoadingService::loaded_shared_class_count(); | |
959 | |
960 case JMM_SHARED_CLASS_UNLOADED_COUNT: | |
961 return ClassLoadingService::unloaded_shared_class_count(); | |
962 | |
963 | |
964 case JMM_SHARED_CLASS_LOADED_BYTES: | |
965 return ClassLoadingService::loaded_shared_class_bytes(); | |
966 | |
967 case JMM_SHARED_CLASS_UNLOADED_BYTES: | |
968 return ClassLoadingService::unloaded_shared_class_bytes(); | |
969 | |
970 case JMM_TOTAL_CLASSLOAD_TIME_MS: | |
971 return ClassLoader::classloader_time_ms(); | |
972 | |
973 case JMM_VM_GLOBAL_COUNT: | |
974 return get_num_flags(); | |
975 | |
976 case JMM_SAFEPOINT_COUNT: | |
977 return RuntimeService::safepoint_count(); | |
978 | |
979 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: | |
980 return RuntimeService::safepoint_sync_time_ms(); | |
981 | |
982 case JMM_TOTAL_STOPPED_TIME_MS: | |
983 return RuntimeService::safepoint_time_ms(); | |
984 | |
985 case JMM_TOTAL_APP_TIME_MS: | |
986 return RuntimeService::application_time_ms(); | |
987 | |
988 case JMM_VM_THREAD_COUNT: | |
989 return get_vm_thread_count(); | |
990 | |
991 case JMM_CLASS_INIT_TOTAL_COUNT: | |
992 return ClassLoader::class_init_count(); | |
993 | |
994 case JMM_CLASS_INIT_TOTAL_TIME_MS: | |
995 return ClassLoader::class_init_time_ms(); | |
996 | |
997 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: | |
998 return ClassLoader::class_verify_time_ms(); | |
999 | |
1000 case JMM_METHOD_DATA_SIZE_BYTES: | |
1001 return ClassLoadingService::class_method_data_size(); | |
1002 | |
1003 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: | |
1004 return os::physical_memory(); | |
1005 | |
1006 default: | |
1007 return -1; | |
1008 } | |
1009 } | |
1010 | |
1011 | |
1012 // Returns the long value of a given attribute. | |
1013 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) | |
1014 if (obj == NULL) { | |
1015 return get_long_attribute(att); | |
1016 } else { | |
1017 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); | |
1018 if (mgr != NULL) { | |
1019 return get_gc_attribute(mgr, att); | |
1020 } | |
1021 } | |
1022 return -1; | |
1023 JVM_END | |
1024 | |
1025 // Gets the value of all attributes specified in the given array | |
1026 // and sets the value in the result array. | |
1027 // Returns the number of attributes found. | |
1028 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, | |
1029 jobject obj, | |
1030 jmmLongAttribute* atts, | |
1031 jint count, | |
1032 jlong* result)) | |
1033 | |
1034 int num_atts = 0; | |
1035 if (obj == NULL) { | |
1036 for (int i = 0; i < count; i++) { | |
1037 result[i] = get_long_attribute(atts[i]); | |
1038 if (result[i] != -1) { | |
1039 num_atts++; | |
1040 } | |
1041 } | |
1042 } else { | |
1043 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); | |
1044 for (int i = 0; i < count; i++) { | |
1045 result[i] = get_gc_attribute(mgr, atts[i]); | |
1046 if (result[i] != -1) { | |
1047 num_atts++; | |
1048 } | |
1049 } | |
1050 } | |
1051 return num_atts; | |
1052 JVM_END | |
1053 | |
1054 // Helper function to do thread dump for a specific list of threads | |
1055 static void do_thread_dump(ThreadDumpResult* dump_result, | |
1056 typeArrayHandle ids_ah, // array of thread ID (long[]) | |
1057 int num_threads, | |
1058 int max_depth, | |
1059 bool with_locked_monitors, | |
1060 bool with_locked_synchronizers, | |
1061 TRAPS) { | |
1062 | |
1063 // First get an array of threadObj handles. | |
1064 // A JavaThread may terminate before we get the stack trace. | |
1065 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
1066 { | |
1067 MutexLockerEx ml(Threads_lock); | |
1068 for (int i = 0; i < num_threads; i++) { | |
1069 jlong tid = ids_ah->long_at(i); | |
1070 JavaThread* jt = find_java_thread_from_id(tid); | |
1071 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); | |
1072 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); | |
1073 thread_handle_array->append(threadObj_h); | |
1074 } | |
1075 } | |
1076 | |
1077 // Obtain thread dumps and thread snapshot information | |
1078 VM_ThreadDump op(dump_result, | |
1079 thread_handle_array, | |
1080 num_threads, | |
1081 max_depth, /* stack depth */ | |
1082 with_locked_monitors, | |
1083 with_locked_synchronizers); | |
1084 VMThread::execute(&op); | |
1085 } | |
1086 | |
1087 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo | |
1088 // for the thread ID specified in the corresponding entry in | |
1089 // the given array of thread IDs; or NULL if the thread does not exist | |
1090 // or has terminated. | |
1091 // | |
1092 // Input parameters: | |
1093 // ids - array of thread IDs | |
1094 // maxDepth - the maximum depth of stack traces to be dumped: | |
1095 // maxDepth == -1 requests to dump entire stack trace. | |
1096 // maxDepth == 0 requests no stack trace. | |
1097 // infoArray - array of ThreadInfo objects | |
1098 // | |
1099 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) | |
1100 // Check if threads is null | |
1101 if (ids == NULL || infoArray == NULL) { | |
1102 THROW_(vmSymbols::java_lang_NullPointerException(), -1); | |
1103 } | |
1104 | |
1105 if (maxDepth < -1) { | |
1106 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1107 "Invalid maxDepth", -1); | |
1108 } | |
1109 | |
1110 ResourceMark rm(THREAD); | |
1111 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); | |
1112 typeArrayHandle ids_ah(THREAD, ta); | |
1113 | |
1114 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); | |
1115 objArrayOop oa = objArrayOop(infoArray_obj); | |
1116 objArrayHandle infoArray_h(THREAD, oa); | |
1117 | |
1118 // validate the thread id array | |
1119 validate_thread_id_array(ids_ah, CHECK_0); | |
1120 | |
1121 // validate the ThreadInfo[] parameters | |
1122 validate_thread_info_array(infoArray_h, CHECK_0); | |
1123 | |
1124 // infoArray must be of the same length as the given array of thread IDs | |
1125 int num_threads = ids_ah->length(); | |
1126 if (num_threads != infoArray_h->length()) { | |
1127 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1128 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); | |
1129 } | |
1130 | |
1131 if (JDK_Version::is_gte_jdk16x_version()) { | |
1132 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
1133 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); | |
1134 } | |
1135 | |
1136 // Must use ThreadDumpResult to store the ThreadSnapshot. | |
1137 // GC may occur after the thread snapshots are taken but before | |
1138 // this function returns. The threadObj and other oops kept | |
1139 // in the ThreadSnapshot are marked and adjusted during GC. | |
1140 ThreadDumpResult dump_result(num_threads); | |
1141 | |
1142 if (maxDepth == 0) { | |
1143 // no stack trace dumped - do not need to stop the world | |
1144 { | |
1145 MutexLockerEx ml(Threads_lock); | |
1146 for (int i = 0; i < num_threads; i++) { | |
1147 jlong tid = ids_ah->long_at(i); | |
1148 JavaThread* jt = find_java_thread_from_id(tid); | |
1149 ThreadSnapshot* ts; | |
1150 if (jt == NULL) { | |
1151 // if the thread does not exist or now it is terminated, | |
1152 // create dummy snapshot | |
1153 ts = new ThreadSnapshot(); | |
1154 } else { | |
1155 ts = new ThreadSnapshot(jt); | |
1156 } | |
1157 dump_result.add_thread_snapshot(ts); | |
1158 } | |
1159 } | |
1160 } else { | |
1161 // obtain thread dump with the specific list of threads with stack trace | |
1162 | |
1163 do_thread_dump(&dump_result, | |
1164 ids_ah, | |
1165 num_threads, | |
1166 maxDepth, | |
1167 false, /* no locked monitor */ | |
1168 false, /* no locked synchronizers */ | |
1169 CHECK_0); | |
1170 } | |
1171 | |
1172 int num_snapshots = dump_result.num_snapshots(); | |
1173 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); | |
1174 int index = 0; | |
1175 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { | |
1176 // For each thread, create an java/lang/management/ThreadInfo object | |
1177 // and fill with the thread information | |
1178 | |
1179 if (ts->threadObj() == NULL) { | |
1180 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
1181 infoArray_h->obj_at_put(index, NULL); | |
1182 continue; | |
1183 } | |
1184 | |
1185 // Create java.lang.management.ThreadInfo object | |
1186 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); | |
1187 infoArray_h->obj_at_put(index, info_obj); | |
1188 } | |
1189 return 0; | |
1190 JVM_END | |
1191 | |
1192 // Dump thread info for the specified threads. | |
1193 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo | |
1194 // for the thread ID specified in the corresponding entry in | |
1195 // the given array of thread IDs; or NULL if the thread does not exist | |
1196 // or has terminated. | |
1197 // | |
1198 // Input parameter: | |
1199 // ids - array of thread IDs; NULL indicates all live threads | |
1200 // locked_monitors - if true, dump locked object monitors | |
1201 // locked_synchronizers - if true, dump locked JSR-166 synchronizers | |
1202 // | |
1203 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) | |
1204 ResourceMark rm(THREAD); | |
1205 | |
1206 if (JDK_Version::is_gte_jdk16x_version()) { | |
1207 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
1208 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); | |
1209 } | |
1210 | |
1211 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); | |
1212 int num_threads = (ta != NULL ? ta->length() : 0); | |
1213 typeArrayHandle ids_ah(THREAD, ta); | |
1214 | |
1215 ThreadDumpResult dump_result(num_threads); // can safepoint | |
1216 | |
1217 if (ids_ah() != NULL) { | |
1218 | |
1219 // validate the thread id array | |
1220 validate_thread_id_array(ids_ah, CHECK_NULL); | |
1221 | |
1222 // obtain thread dump of a specific list of threads | |
1223 do_thread_dump(&dump_result, | |
1224 ids_ah, | |
1225 num_threads, | |
1226 -1, /* entire stack */ | |
1227 (locked_monitors ? true : false), /* with locked monitors */ | |
1228 (locked_synchronizers ? true : false), /* with locked synchronizers */ | |
1229 CHECK_NULL); | |
1230 } else { | |
1231 // obtain thread dump of all threads | |
1232 VM_ThreadDump op(&dump_result, | |
1233 -1, /* entire stack */ | |
1234 (locked_monitors ? true : false), /* with locked monitors */ | |
1235 (locked_synchronizers ? true : false) /* with locked synchronizers */); | |
1236 VMThread::execute(&op); | |
1237 } | |
1238 | |
1239 int num_snapshots = dump_result.num_snapshots(); | |
1240 | |
1241 // create the result ThreadInfo[] object | |
1242 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
1243 instanceKlassHandle ik (THREAD, k); | |
1244 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); | |
1245 objArrayHandle result_h(THREAD, r); | |
1246 | |
1247 int index = 0; | |
1248 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { | |
1249 if (ts->threadObj() == NULL) { | |
1250 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
1251 result_h->obj_at_put(index, NULL); | |
1252 continue; | |
1253 } | |
1254 | |
1255 | |
1256 | |
1257 ThreadStackTrace* stacktrace = ts->get_stack_trace(); | |
1258 assert(stacktrace != NULL, "Must have a stack trace dumped"); | |
1259 | |
1260 // Create Object[] filled with locked monitors | |
1261 // Create int[] filled with the stack depth where a monitor was locked | |
1262 int num_frames = stacktrace->get_stack_depth(); | |
1263 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); | |
1264 | |
1265 // Count the total number of locked monitors | |
1266 for (int i = 0; i < num_frames; i++) { | |
1267 StackFrameInfo* frame = stacktrace->stack_frame_at(i); | |
1268 num_locked_monitors += frame->num_locked_monitors(); | |
1269 } | |
1270 | |
1271 objArrayHandle monitors_array; | |
1272 typeArrayHandle depths_array; | |
1273 objArrayHandle synchronizers_array; | |
1274 | |
1275 if (locked_monitors) { | |
1276 // Constructs Object[] and int[] to contain the object monitor and the stack depth | |
1277 // where the thread locked it | |
1278 objArrayOop array = oopFactory::new_system_objArray(num_locked_monitors, CHECK_NULL); | |
1279 objArrayHandle mh(THREAD, array); | |
1280 monitors_array = mh; | |
1281 | |
1282 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); | |
1283 typeArrayHandle dh(THREAD, tarray); | |
1284 depths_array = dh; | |
1285 | |
1286 int count = 0; | |
1287 int j = 0; | |
1288 for (int depth = 0; depth < num_frames; depth++) { | |
1289 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); | |
1290 int len = frame->num_locked_monitors(); | |
1291 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); | |
1292 for (j = 0; j < len; j++) { | |
1293 oop monitor = locked_monitors->at(j); | |
1294 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); | |
1295 monitors_array->obj_at_put(count, monitor); | |
1296 depths_array->int_at_put(count, depth); | |
1297 count++; | |
1298 } | |
1299 } | |
1300 | |
1301 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); | |
1302 for (j = 0; j < jni_locked_monitors->length(); j++) { | |
1303 oop object = jni_locked_monitors->at(j); | |
1304 assert(object != NULL && object->is_instance(), "must be a Java object"); | |
1305 monitors_array->obj_at_put(count, object); | |
1306 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info | |
1307 depths_array->int_at_put(count, -1); | |
1308 count++; | |
1309 } | |
1310 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); | |
1311 } | |
1312 | |
1313 if (locked_synchronizers) { | |
1314 // Create Object[] filled with locked JSR-166 synchronizers | |
1315 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); | |
1316 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); | |
1317 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); | |
1318 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); | |
1319 | |
1320 objArrayOop array = oopFactory::new_system_objArray(num_locked_synchronizers, CHECK_NULL); | |
1321 objArrayHandle sh(THREAD, array); | |
1322 synchronizers_array = sh; | |
1323 | |
1324 for (int k = 0; k < num_locked_synchronizers; k++) { | |
1325 synchronizers_array->obj_at_put(k, locks->at(k)); | |
1326 } | |
1327 } | |
1328 | |
1329 // Create java.lang.management.ThreadInfo object | |
1330 instanceOop info_obj = Management::create_thread_info_instance(ts, | |
1331 monitors_array, | |
1332 depths_array, | |
1333 synchronizers_array, | |
1334 CHECK_NULL); | |
1335 result_h->obj_at_put(index, info_obj); | |
1336 } | |
1337 | |
1338 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
1339 JVM_END | |
1340 | |
1341 // Returns an array of Class objects. | |
1342 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) | |
1343 ResourceMark rm(THREAD); | |
1344 | |
1345 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter | |
1346 | |
1347 int num_classes = lce.num_loaded_classes(); | |
1142 | 1348 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); |
0 | 1349 objArrayHandle classes_ah(THREAD, r); |
1350 | |
1351 for (int i = 0; i < num_classes; i++) { | |
1352 KlassHandle kh = lce.get_klass(i); | |
1353 oop mirror = Klass::cast(kh())->java_mirror(); | |
1354 classes_ah->obj_at_put(i, mirror); | |
1355 } | |
1356 | |
1357 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); | |
1358 JVM_END | |
1359 | |
1360 // Reset statistic. Return true if the requested statistic is reset. | |
1361 // Otherwise, return false. | |
1362 // | |
1363 // Input parameters: | |
1364 // obj - specify which instance the statistic associated with to be reset | |
1365 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. | |
1366 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. | |
1367 // type - the type of statistic to be reset | |
1368 // | |
1369 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) | |
1370 ResourceMark rm(THREAD); | |
1371 | |
1372 switch (type) { | |
1373 case JMM_STAT_PEAK_THREAD_COUNT: | |
1374 ThreadService::reset_peak_thread_count(); | |
1375 return true; | |
1376 | |
1377 case JMM_STAT_THREAD_CONTENTION_COUNT: | |
1378 case JMM_STAT_THREAD_CONTENTION_TIME: { | |
1379 jlong tid = obj.j; | |
1380 if (tid < 0) { | |
1381 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); | |
1382 } | |
1383 | |
1384 // Look for the JavaThread of this given tid | |
1385 MutexLockerEx ml(Threads_lock); | |
1386 if (tid == 0) { | |
1387 // reset contention statistics for all threads if tid == 0 | |
1388 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { | |
1389 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
1390 ThreadService::reset_contention_count_stat(java_thread); | |
1391 } else { | |
1392 ThreadService::reset_contention_time_stat(java_thread); | |
1393 } | |
1394 } | |
1395 } else { | |
1396 // reset contention statistics for a given thread | |
1397 JavaThread* java_thread = find_java_thread_from_id(tid); | |
1398 if (java_thread == NULL) { | |
1399 return false; | |
1400 } | |
1401 | |
1402 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
1403 ThreadService::reset_contention_count_stat(java_thread); | |
1404 } else { | |
1405 ThreadService::reset_contention_time_stat(java_thread); | |
1406 } | |
1407 } | |
1408 return true; | |
1409 break; | |
1410 } | |
1411 case JMM_STAT_PEAK_POOL_USAGE: { | |
1412 jobject o = obj.l; | |
1413 if (o == NULL) { | |
1414 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1415 } | |
1416 | |
1417 oop pool_obj = JNIHandles::resolve(o); | |
1418 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
1419 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
1420 | |
1421 MemoryPool* pool = MemoryService::get_memory_pool(ph); | |
1422 if (pool != NULL) { | |
1423 pool->reset_peak_memory_usage(); | |
1424 return true; | |
1425 } | |
1426 break; | |
1427 } | |
1428 case JMM_STAT_GC_STAT: { | |
1429 jobject o = obj.l; | |
1430 if (o == NULL) { | |
1431 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1432 } | |
1433 | |
1434 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); | |
1435 if (mgr != NULL) { | |
1436 mgr->reset_gc_stat(); | |
1437 return true; | |
1438 } | |
1439 break; | |
1440 } | |
1441 default: | |
1442 assert(0, "Unknown Statistic Type"); | |
1443 } | |
1444 return false; | |
1445 JVM_END | |
1446 | |
1447 // Returns the fast estimate of CPU time consumed by | |
1448 // a given thread (in nanoseconds). | |
1449 // If thread_id == 0, return CPU time for the current thread. | |
1450 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) | |
1451 if (!os::is_thread_cpu_time_supported()) { | |
1452 return -1; | |
1453 } | |
1454 | |
1455 if (thread_id < 0) { | |
1456 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1457 "Invalid thread ID", -1); | |
1458 } | |
1459 | |
1460 JavaThread* java_thread = NULL; | |
1461 if (thread_id == 0) { | |
1462 // current thread | |
1463 return os::current_thread_cpu_time(); | |
1464 } else { | |
1465 MutexLockerEx ml(Threads_lock); | |
1466 java_thread = find_java_thread_from_id(thread_id); | |
1467 if (java_thread != NULL) { | |
1468 return os::thread_cpu_time((Thread*) java_thread); | |
1469 } | |
1470 } | |
1471 return -1; | |
1472 JVM_END | |
1473 | |
1474 // Returns the CPU time consumed by a given thread (in nanoseconds). | |
1475 // If thread_id == 0, CPU time for the current thread is returned. | |
1476 // If user_sys_cpu_time = true, user level and system CPU time of | |
1477 // a given thread is returned; otherwise, only user level CPU time | |
1478 // is returned. | |
1479 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) | |
1480 if (!os::is_thread_cpu_time_supported()) { | |
1481 return -1; | |
1482 } | |
1483 | |
1484 if (thread_id < 0) { | |
1485 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1486 "Invalid thread ID", -1); | |
1487 } | |
1488 | |
1489 JavaThread* java_thread = NULL; | |
1490 if (thread_id == 0) { | |
1491 // current thread | |
1492 return os::current_thread_cpu_time(user_sys_cpu_time != 0); | |
1493 } else { | |
1494 MutexLockerEx ml(Threads_lock); | |
1495 java_thread = find_java_thread_from_id(thread_id); | |
1496 if (java_thread != NULL) { | |
1497 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); | |
1498 } | |
1499 } | |
1500 return -1; | |
1501 JVM_END | |
1502 | |
1503 // Returns a String array of all VM global flag names | |
1504 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) | |
1505 // last flag entry is always NULL, so subtract 1 | |
1506 int nFlags = (int) Flag::numFlags - 1; | |
1507 // allocate a temp array | |
1142 | 1508 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 1509 nFlags, CHECK_0); |
1510 objArrayHandle flags_ah(THREAD, r); | |
1511 int num_entries = 0; | |
1512 for (int i = 0; i < nFlags; i++) { | |
1513 Flag* flag = &Flag::flags[i]; | |
350 | 1514 // Exclude the locked (experimental, diagnostic) flags |
0 | 1515 if (flag->is_unlocked() || flag->is_unlocker()) { |
1516 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); | |
1517 flags_ah->obj_at_put(num_entries, s()); | |
1518 num_entries++; | |
1519 } | |
1520 } | |
1521 | |
1522 if (num_entries < nFlags) { | |
1523 // Return array of right length | |
1142 | 1524 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); |
0 | 1525 for(int i = 0; i < num_entries; i++) { |
1526 res->obj_at_put(i, flags_ah->obj_at(i)); | |
1527 } | |
1528 return (jobjectArray)JNIHandles::make_local(env, res); | |
1529 } | |
1530 | |
1531 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); | |
1532 JVM_END | |
1533 | |
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1534 // Utility function used by jmm_GetVMGlobals. Returns false if flag type |
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1535 // can't be determined, true otherwise. If false is returned, then *global |
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1536 // will be incomplete and invalid. |
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1537 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { |
0 | 1538 Handle flag_name; |
1539 if (name() == NULL) { | |
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1540 flag_name = java_lang_String::create_from_str(flag->name, CHECK_false); |
0 | 1541 } else { |
1542 flag_name = name; | |
1543 } | |
1544 global->name = (jstring)JNIHandles::make_local(env, flag_name()); | |
1545 | |
1546 if (flag->is_bool()) { | |
1547 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; | |
1548 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; | |
1549 } else if (flag->is_intx()) { | |
1550 global->value.j = (jlong)flag->get_intx(); | |
1551 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
1552 } else if (flag->is_uintx()) { | |
1553 global->value.j = (jlong)flag->get_uintx(); | |
1554 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
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1555 } else if (flag->is_uint64_t()) { |
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1556 global->value.j = (jlong)flag->get_uint64_t(); |
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1557 global->type = JMM_VMGLOBAL_TYPE_JLONG; |
0 | 1558 } else if (flag->is_ccstr()) { |
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1559 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); |
0 | 1560 global->value.l = (jobject)JNIHandles::make_local(env, str()); |
1561 global->type = JMM_VMGLOBAL_TYPE_JSTRING; | |
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1562 } else { |
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1563 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; |
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1564 return false; |
0 | 1565 } |
1566 | |
1567 global->writeable = flag->is_writeable(); | |
1568 global->external = flag->is_external(); | |
1569 switch (flag->origin) { | |
1570 case DEFAULT: | |
1571 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; | |
1572 break; | |
1573 case COMMAND_LINE: | |
1574 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; | |
1575 break; | |
1576 case ENVIRON_VAR: | |
1577 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; | |
1578 break; | |
1579 case CONFIG_FILE: | |
1580 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; | |
1581 break; | |
1582 case MANAGEMENT: | |
1583 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; | |
1584 break; | |
1585 case ERGONOMIC: | |
1586 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; | |
1587 break; | |
1588 default: | |
1589 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; | |
1590 } | |
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1591 |
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1592 return true; |
0 | 1593 } |
1594 | |
1595 // Fill globals array of count length with jmmVMGlobal entries | |
1596 // specified by names. If names == NULL, fill globals array | |
1597 // with all Flags. Return value is number of entries | |
1598 // created in globals. | |
1599 // If a Flag with a given name in an array element does not | |
1600 // exist, globals[i].name will be set to NULL. | |
1601 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, | |
1602 jobjectArray names, | |
1603 jmmVMGlobal *globals, | |
1604 jint count)) | |
1605 | |
1606 | |
1607 if (globals == NULL) { | |
1608 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1609 } | |
1610 | |
1611 ResourceMark rm(THREAD); | |
1612 | |
1613 if (names != NULL) { | |
1614 // return the requested globals | |
1615 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); | |
1616 objArrayHandle names_ah(THREAD, ta); | |
1617 // Make sure we have a String array | |
1618 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
1142 | 1619 if (element_klass != SystemDictionary::String_klass()) { |
0 | 1620 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
1621 "Array element type is not String class", 0); | |
1622 } | |
1623 | |
1624 int names_length = names_ah->length(); | |
1625 int num_entries = 0; | |
1626 for (int i = 0; i < names_length && i < count; i++) { | |
1627 oop s = names_ah->obj_at(i); | |
1628 if (s == NULL) { | |
1629 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1630 } | |
1631 | |
1632 Handle sh(THREAD, s); | |
1633 char* str = java_lang_String::as_utf8_string(s); | |
1634 Flag* flag = Flag::find_flag(str, strlen(str)); | |
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1635 if (flag != NULL && |
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1636 add_global_entry(env, sh, &globals[i], flag, THREAD)) { |
0 | 1637 num_entries++; |
1638 } else { | |
1639 globals[i].name = NULL; | |
1640 } | |
1641 } | |
1642 return num_entries; | |
1643 } else { | |
1644 // return all globals if names == NULL | |
1645 | |
1646 // last flag entry is always NULL, so subtract 1 | |
1647 int nFlags = (int) Flag::numFlags - 1; | |
1648 Handle null_h; | |
1649 int num_entries = 0; | |
1650 for (int i = 0; i < nFlags && num_entries < count; i++) { | |
1651 Flag* flag = &Flag::flags[i]; | |
350 | 1652 // Exclude the locked (diagnostic, experimental) flags |
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1653 if ((flag->is_unlocked() || flag->is_unlocker()) && |
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1654 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { |
0 | 1655 num_entries++; |
1656 } | |
1657 } | |
1658 return num_entries; | |
1659 } | |
1660 JVM_END | |
1661 | |
1662 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) | |
1663 ResourceMark rm(THREAD); | |
1664 | |
1665 oop fn = JNIHandles::resolve_external_guard(flag_name); | |
1666 if (fn == NULL) { | |
1667 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
1668 "The flag name cannot be null."); | |
1669 } | |
1670 char* name = java_lang_String::as_utf8_string(fn); | |
1671 Flag* flag = Flag::find_flag(name, strlen(name)); | |
1672 if (flag == NULL) { | |
1673 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
1674 "Flag does not exist."); | |
1675 } | |
1676 if (!flag->is_writeable()) { | |
1677 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
1678 "This flag is not writeable."); | |
1679 } | |
1680 | |
1681 bool succeed; | |
1682 if (flag->is_bool()) { | |
1683 bool bvalue = (new_value.z == JNI_TRUE ? true : false); | |
1684 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); | |
1685 } else if (flag->is_intx()) { | |
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1686 intx ivalue = (intx)new_value.j; |
0 | 1687 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); |
1688 } else if (flag->is_uintx()) { | |
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1689 uintx uvalue = (uintx)new_value.j; |
0 | 1690 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); |
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1691 } else if (flag->is_uint64_t()) { |
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1692 uint64_t uvalue = (uint64_t)new_value.j; |
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1693 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT); |
0 | 1694 } else if (flag->is_ccstr()) { |
1695 oop str = JNIHandles::resolve_external_guard(new_value.l); | |
1696 if (str == NULL) { | |
1697 THROW(vmSymbols::java_lang_NullPointerException()); | |
1698 } | |
1699 ccstr svalue = java_lang_String::as_utf8_string(str); | |
1700 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); | |
1701 } | |
1702 assert(succeed, "Setting flag should succeed"); | |
1703 JVM_END | |
1704 | |
1705 class ThreadTimesClosure: public ThreadClosure { | |
1706 private: | |
1707 objArrayOop _names; | |
1708 typeArrayOop _times; | |
1709 int _names_len; | |
1710 int _times_len; | |
1711 int _count; | |
1712 | |
1713 public: | |
1714 ThreadTimesClosure(objArrayOop names, typeArrayOop times); | |
1715 virtual void do_thread(Thread* thread); | |
1716 int count() { return _count; } | |
1717 }; | |
1718 | |
1719 ThreadTimesClosure::ThreadTimesClosure(objArrayOop names, | |
1720 typeArrayOop times) { | |
1721 assert(names != NULL, "names was NULL"); | |
1722 assert(times != NULL, "times was NULL"); | |
1723 _names = names; | |
1724 _names_len = names->length(); | |
1725 _times = times; | |
1726 _times_len = times->length(); | |
1727 _count = 0; | |
1728 } | |
1729 | |
1730 void ThreadTimesClosure::do_thread(Thread* thread) { | |
1731 Handle s; | |
1732 assert(thread != NULL, "thread was NULL"); | |
1733 | |
1734 // exclude externally visible JavaThreads | |
1735 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
1736 return; | |
1737 } | |
1738 | |
1739 if (_count >= _names_len || _count >= _times_len) { | |
1740 // skip if the result array is not big enough | |
1741 return; | |
1742 } | |
1743 | |
1744 EXCEPTION_MARK; | |
1745 | |
1746 assert(thread->name() != NULL, "All threads should have a name"); | |
1747 s = java_lang_String::create_from_str(thread->name(), CHECK); | |
1748 _names->obj_at_put(_count, s()); | |
1749 | |
1750 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? | |
1751 os::thread_cpu_time(thread) : -1); | |
1752 _count++; | |
1753 } | |
1754 | |
1755 // Fills names with VM internal thread names and times with the corresponding | |
1756 // CPU times. If names or times is NULL, a NullPointerException is thrown. | |
1757 // If the element type of names is not String, an IllegalArgumentException is | |
1758 // thrown. | |
1759 // If an array is not large enough to hold all the entries, only the entries | |
1760 // that fit will be returned. Return value is the number of VM internal | |
1761 // threads entries. | |
1762 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, | |
1763 jobjectArray names, | |
1764 jlongArray times)) | |
1765 if (names == NULL || times == NULL) { | |
1766 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1767 } | |
1768 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); | |
1769 objArrayHandle names_ah(THREAD, na); | |
1770 | |
1771 // Make sure we have a String array | |
1772 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
1142 | 1773 if (element_klass != SystemDictionary::String_klass()) { |
0 | 1774 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
1775 "Array element type is not String class", 0); | |
1776 } | |
1777 | |
1778 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); | |
1779 typeArrayHandle times_ah(THREAD, ta); | |
1780 | |
1781 ThreadTimesClosure ttc(names_ah(), times_ah()); | |
1782 { | |
1783 MutexLockerEx ml(Threads_lock); | |
1784 Threads::threads_do(&ttc); | |
1785 } | |
1786 | |
1787 return ttc.count(); | |
1788 JVM_END | |
1789 | |
1790 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { | |
1791 ResourceMark rm(THREAD); | |
1792 | |
1793 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); | |
1794 VMThread::execute(&op); | |
1795 | |
1796 DeadlockCycle* deadlocks = op.result(); | |
1797 if (deadlocks == NULL) { | |
1798 // no deadlock found and return | |
1799 return Handle(); | |
1800 } | |
1801 | |
1802 int num_threads = 0; | |
1803 DeadlockCycle* cycle; | |
1804 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
1805 num_threads += cycle->num_threads(); | |
1806 } | |
1807 | |
1142 | 1808 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); |
0 | 1809 objArrayHandle threads_ah(THREAD, r); |
1810 | |
1811 int index = 0; | |
1812 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
1813 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); | |
1814 int len = deadlock_threads->length(); | |
1815 for (int i = 0; i < len; i++) { | |
1816 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); | |
1817 index++; | |
1818 } | |
1819 } | |
1820 return threads_ah; | |
1821 } | |
1822 | |
1823 // Finds cycles of threads that are deadlocked involved in object monitors | |
1824 // and JSR-166 synchronizers. | |
1825 // Returns an array of Thread objects which are in deadlock, if any. | |
1826 // Otherwise, returns NULL. | |
1827 // | |
1828 // Input parameter: | |
1829 // object_monitors_only - if true, only check object monitors | |
1830 // | |
1831 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) | |
1832 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); | |
1833 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1834 JVM_END | |
1835 | |
1836 // Finds cycles of threads that are deadlocked on monitor locks | |
1837 // Returns an array of Thread objects which are in deadlock, if any. | |
1838 // Otherwise, returns NULL. | |
1839 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) | |
1840 Handle result = find_deadlocks(true, CHECK_0); | |
1841 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1842 JVM_END | |
1843 | |
1844 // Gets the information about GC extension attributes including | |
1845 // the name of the attribute, its type, and a short description. | |
1846 // | |
1847 // Input parameters: | |
1848 // mgr - GC memory manager | |
1849 // info - caller allocated array of jmmExtAttributeInfo | |
1850 // count - number of elements of the info array | |
1851 // | |
1852 // Returns the number of GC extension attributes filled in the info array; or | |
1853 // -1 if info is not big enough | |
1854 // | |
1855 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) | |
1856 // All GC memory managers have 1 attribute (number of GC threads) | |
1857 if (count == 0) { | |
1858 return 0; | |
1859 } | |
1860 | |
1861 if (info == NULL) { | |
1862 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1863 } | |
1864 | |
1865 info[0].name = "GcThreadCount"; | |
1866 info[0].type = 'I'; | |
1867 info[0].description = "Number of GC threads"; | |
1868 return 1; | |
1869 JVM_END | |
1870 | |
1871 // verify the given array is an array of java/lang/management/MemoryUsage objects | |
1872 // of a given length and return the objArrayOop | |
1873 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { | |
1874 if (array == NULL) { | |
1875 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
1876 } | |
1877 | |
1878 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); | |
1879 objArrayHandle array_h(THREAD, oa); | |
1880 | |
1881 // array must be of the given length | |
1882 if (length != array_h->length()) { | |
1883 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1884 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); | |
1885 } | |
1886 | |
1887 // check if the element of array is of type MemoryUsage class | |
1888 klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); | |
1889 klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass(); | |
1890 if (element_klass != usage_klass) { | |
1891 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
1892 "The element type is not MemoryUsage class", 0); | |
1893 } | |
1894 | |
1895 return array_h(); | |
1896 } | |
1897 | |
1898 // Gets the statistics of the last GC of a given GC memory manager. | |
1899 // Input parameters: | |
1900 // obj - GarbageCollectorMXBean object | |
1901 // gc_stat - caller allocated jmmGCStat where: | |
1902 // a. before_gc_usage - array of MemoryUsage objects | |
1903 // b. after_gc_usage - array of MemoryUsage objects | |
1904 // c. gc_ext_attributes_values_size is set to the | |
1905 // gc_ext_attribute_values array allocated | |
1906 // d. gc_ext_attribute_values is a caller allocated array of jvalue. | |
1907 // | |
1908 // On return, | |
1909 // gc_index == 0 indicates no GC statistics available | |
1910 // | |
1911 // before_gc_usage and after_gc_usage - filled with per memory pool | |
1912 // before and after GC usage in the same order as the memory pools | |
1913 // returned by GetMemoryPools for a given GC memory manager. | |
1914 // num_gc_ext_attributes indicates the number of elements in | |
1915 // the gc_ext_attribute_values array is filled; or | |
1916 // -1 if the gc_ext_attributes_values array is not big enough | |
1917 // | |
1918 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) | |
1919 ResourceMark rm(THREAD); | |
1920 | |
1921 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { | |
1922 THROW(vmSymbols::java_lang_NullPointerException()); | |
1923 } | |
1924 | |
1925 // Get the GCMemoryManager | |
1926 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); | |
1927 | |
1928 // Make a copy of the last GC statistics | |
1929 // GC may occur while constructing the last GC information | |
1930 int num_pools = MemoryService::num_memory_pools(); | |
1931 GCStatInfo* stat = new GCStatInfo(num_pools); | |
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1932 if (mgr->get_last_gc_stat(stat) == 0) { |
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1933 gc_stat->gc_index = 0; |
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1934 return; |
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1935 } |
0 | 1936 |
1937 gc_stat->gc_index = stat->gc_index(); | |
1938 gc_stat->start_time = Management::ticks_to_ms(stat->start_time()); | |
1939 gc_stat->end_time = Management::ticks_to_ms(stat->end_time()); | |
1940 | |
1941 // Current implementation does not have GC extension attributes | |
1942 gc_stat->num_gc_ext_attributes = 0; | |
1943 | |
1944 // Fill the arrays of MemoryUsage objects with before and after GC | |
1945 // per pool memory usage | |
1946 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, | |
1947 num_pools, | |
1948 CHECK); | |
1949 objArrayHandle usage_before_gc_ah(THREAD, bu); | |
1950 | |
1951 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, | |
1952 num_pools, | |
1953 CHECK); | |
1954 objArrayHandle usage_after_gc_ah(THREAD, au); | |
1955 | |
1956 for (int i = 0; i < num_pools; i++) { | |
1957 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK); | |
1958 Handle after_usage; | |
1959 | |
1960 MemoryUsage u = stat->after_gc_usage_for_pool(i); | |
1961 if (u.max_size() == 0 && u.used() > 0) { | |
1962 // If max size == 0, this pool is a survivor space. | |
1963 // Set max size = -1 since the pools will be swapped after GC. | |
1964 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); | |
1965 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); | |
1966 } else { | |
1967 after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK); | |
1968 } | |
1969 usage_before_gc_ah->obj_at_put(i, before_usage()); | |
1970 usage_after_gc_ah->obj_at_put(i, after_usage()); | |
1971 } | |
1972 | |
1973 if (gc_stat->gc_ext_attribute_values_size > 0) { | |
1974 // Current implementation only has 1 attribute (number of GC threads) | |
1975 // The type is 'I' | |
1976 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); | |
1977 } | |
1978 JVM_END | |
1979 | |
1980 // Dump heap - Returns 0 if succeeds. | |
1981 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) | |
1982 #ifndef SERVICES_KERNEL | |
1983 ResourceMark rm(THREAD); | |
1984 oop on = JNIHandles::resolve_external_guard(outputfile); | |
1985 if (on == NULL) { | |
1986 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
1987 "Output file name cannot be null.", -1); | |
1988 } | |
1989 char* name = java_lang_String::as_utf8_string(on); | |
1990 if (name == NULL) { | |
1991 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
1992 "Output file name cannot be null.", -1); | |
1993 } | |
1994 HeapDumper dumper(live ? true : false); | |
1995 if (dumper.dump(name) != 0) { | |
1996 const char* errmsg = dumper.error_as_C_string(); | |
1997 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); | |
1998 } | |
1999 return 0; | |
2000 #else // SERVICES_KERNEL | |
2001 return -1; | |
2002 #endif // SERVICES_KERNEL | |
2003 JVM_END | |
2004 | |
2005 jlong Management::ticks_to_ms(jlong ticks) { | |
2006 assert(os::elapsed_frequency() > 0, "Must be non-zero"); | |
2007 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) | |
2008 * (double)1000.0); | |
2009 } | |
2010 | |
2011 const struct jmmInterface_1_ jmm_interface = { | |
2012 NULL, | |
2013 NULL, | |
2014 jmm_GetVersion, | |
2015 jmm_GetOptionalSupport, | |
2016 jmm_GetInputArguments, | |
2017 jmm_GetThreadInfo, | |
2018 jmm_GetInputArgumentArray, | |
2019 jmm_GetMemoryPools, | |
2020 jmm_GetMemoryManagers, | |
2021 jmm_GetMemoryPoolUsage, | |
2022 jmm_GetPeakMemoryPoolUsage, | |
2023 NULL, | |
2024 jmm_GetMemoryUsage, | |
2025 jmm_GetLongAttribute, | |
2026 jmm_GetBoolAttribute, | |
2027 jmm_SetBoolAttribute, | |
2028 jmm_GetLongAttributes, | |
2029 jmm_FindMonitorDeadlockedThreads, | |
2030 jmm_GetThreadCpuTime, | |
2031 jmm_GetVMGlobalNames, | |
2032 jmm_GetVMGlobals, | |
2033 jmm_GetInternalThreadTimes, | |
2034 jmm_ResetStatistic, | |
2035 jmm_SetPoolSensor, | |
2036 jmm_SetPoolThreshold, | |
2037 jmm_GetPoolCollectionUsage, | |
2038 jmm_GetGCExtAttributeInfo, | |
2039 jmm_GetLastGCStat, | |
2040 jmm_GetThreadCpuTimeWithKind, | |
2041 NULL, | |
2042 jmm_DumpHeap0, | |
2043 jmm_FindDeadlockedThreads, | |
2044 jmm_SetVMGlobal, | |
2045 NULL, | |
2046 jmm_DumpThreads | |
2047 }; | |
2048 | |
2049 void* Management::get_jmm_interface(int version) { | |
2050 if (version == JMM_VERSION_1_0) { | |
2051 return (void*) &jmm_interface; | |
2052 } | |
2053 return NULL; | |
2054 } |