Mercurial > hg > graal-jvmci-8
annotate src/share/vm/services/management.cpp @ 3356:78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
Summary: Add a notification to the GarbageCollectorMXBeans
Reviewed-by: acorn, mchung
| author | fparain |
|---|---|
| date | Thu, 12 May 2011 10:30:11 -0700 |
| parents | 02f78cfa4656 |
| children | 3b688d6ff3d0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2011, 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 * | |
|
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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" | |
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41 #include "runtime/serviceThread.hpp" |
| 1972 | 42 #include "services/classLoadingService.hpp" |
| 43 #include "services/heapDumper.hpp" | |
| 44 #include "services/lowMemoryDetector.hpp" | |
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45 #include "services/gcNotifier.hpp" |
| 1972 | 46 #include "services/management.hpp" |
| 47 #include "services/memoryManager.hpp" | |
| 48 #include "services/memoryPool.hpp" | |
| 49 #include "services/memoryService.hpp" | |
| 50 #include "services/runtimeService.hpp" | |
| 51 #include "services/threadService.hpp" | |
| 0 | 52 |
| 53 PerfVariable* Management::_begin_vm_creation_time = NULL; | |
| 54 PerfVariable* Management::_end_vm_creation_time = NULL; | |
| 55 PerfVariable* Management::_vm_init_done_time = NULL; | |
| 56 | |
| 57 klassOop Management::_sensor_klass = NULL; | |
| 58 klassOop Management::_threadInfo_klass = NULL; | |
| 59 klassOop Management::_memoryUsage_klass = NULL; | |
| 60 klassOop Management::_memoryPoolMXBean_klass = NULL; | |
| 61 klassOop Management::_memoryManagerMXBean_klass = NULL; | |
| 62 klassOop Management::_garbageCollectorMXBean_klass = NULL; | |
| 63 klassOop Management::_managementFactory_klass = NULL; | |
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64 klassOop Management::_garbageCollectorImpl_klass = NULL; |
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65 klassOop Management::_gcInfo_klass = NULL; |
| 0 | 66 |
| 67 jmmOptionalSupport Management::_optional_support = {0}; | |
| 68 TimeStamp Management::_stamp; | |
| 69 | |
| 70 void management_init() { | |
| 71 Management::init(); | |
| 72 ThreadService::init(); | |
| 73 RuntimeService::init(); | |
| 74 ClassLoadingService::init(); | |
| 75 } | |
| 76 | |
| 77 void Management::init() { | |
| 78 EXCEPTION_MARK; | |
| 79 | |
| 80 // These counters are for java.lang.management API support. | |
| 81 // They are created even if -XX:-UsePerfData is set and in | |
| 82 // that case, they will be allocated on C heap. | |
| 83 | |
| 84 _begin_vm_creation_time = | |
| 85 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", | |
| 86 PerfData::U_None, CHECK); | |
| 87 | |
| 88 _end_vm_creation_time = | |
| 89 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", | |
| 90 PerfData::U_None, CHECK); | |
| 91 | |
| 92 _vm_init_done_time = | |
| 93 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", | |
| 94 PerfData::U_None, CHECK); | |
| 95 | |
| 96 // Initialize optional support | |
| 97 _optional_support.isLowMemoryDetectionSupported = 1; | |
| 98 _optional_support.isCompilationTimeMonitoringSupported = 1; | |
| 99 _optional_support.isThreadContentionMonitoringSupported = 1; | |
| 100 | |
| 101 if (os::is_thread_cpu_time_supported()) { | |
| 102 _optional_support.isCurrentThreadCpuTimeSupported = 1; | |
| 103 _optional_support.isOtherThreadCpuTimeSupported = 1; | |
| 104 } else { | |
| 105 _optional_support.isCurrentThreadCpuTimeSupported = 0; | |
| 106 _optional_support.isOtherThreadCpuTimeSupported = 0; | |
| 107 } | |
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108 |
| 0 | 109 _optional_support.isBootClassPathSupported = 1; |
| 110 _optional_support.isObjectMonitorUsageSupported = 1; | |
| 111 #ifndef SERVICES_KERNEL | |
| 112 // This depends on the heap inspector | |
| 113 _optional_support.isSynchronizerUsageSupported = 1; | |
| 114 #endif // SERVICES_KERNEL | |
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115 _optional_support.isThreadAllocatedMemorySupported = 1; |
| 0 | 116 } |
| 117 | |
| 118 void Management::initialize(TRAPS) { | |
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119 // Start the service thread |
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120 ServiceThread::initialize(); |
| 0 | 121 |
| 122 if (ManagementServer) { | |
| 123 ResourceMark rm(THREAD); | |
| 124 HandleMark hm(THREAD); | |
| 125 | |
| 126 // Load and initialize the sun.management.Agent class | |
| 127 // invoke startAgent method to start the management server | |
| 128 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
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129 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), |
| 0 | 130 loader, |
| 131 Handle(), | |
| 132 true, | |
| 133 CHECK); | |
| 134 instanceKlassHandle ik (THREAD, k); | |
| 135 | |
| 136 JavaValue result(T_VOID); | |
| 137 JavaCalls::call_static(&result, | |
| 138 ik, | |
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139 vmSymbols::startAgent_name(), |
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140 vmSymbols::void_method_signature(), |
| 0 | 141 CHECK); |
| 142 } | |
| 143 } | |
| 144 | |
| 145 void Management::get_optional_support(jmmOptionalSupport* support) { | |
| 146 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); | |
| 147 } | |
| 148 | |
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149 klassOop Management::load_and_initialize_klass(Symbol* sh, TRAPS) { |
| 0 | 150 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); |
| 151 instanceKlassHandle ik (THREAD, k); | |
| 152 if (ik->should_be_initialized()) { | |
| 153 ik->initialize(CHECK_NULL); | |
| 154 } | |
| 155 return ik(); | |
| 156 } | |
| 157 | |
| 158 void Management::record_vm_startup_time(jlong begin, jlong duration) { | |
| 159 // if the performance counter is not initialized, | |
| 160 // then vm initialization failed; simply return. | |
| 161 if (_begin_vm_creation_time == NULL) return; | |
| 162 | |
| 163 _begin_vm_creation_time->set_value(begin); | |
| 164 _end_vm_creation_time->set_value(begin + duration); | |
| 165 PerfMemory::set_accessible(true); | |
| 166 } | |
| 167 | |
| 168 jlong Management::timestamp() { | |
| 169 TimeStamp t; | |
| 170 t.update(); | |
| 171 return t.ticks() - _stamp.ticks(); | |
| 172 } | |
| 173 | |
| 174 void Management::oops_do(OopClosure* f) { | |
| 175 MemoryService::oops_do(f); | |
| 176 ThreadService::oops_do(f); | |
| 177 | |
| 178 f->do_oop((oop*) &_sensor_klass); | |
| 179 f->do_oop((oop*) &_threadInfo_klass); | |
| 180 f->do_oop((oop*) &_memoryUsage_klass); | |
| 181 f->do_oop((oop*) &_memoryPoolMXBean_klass); | |
| 182 f->do_oop((oop*) &_memoryManagerMXBean_klass); | |
| 183 f->do_oop((oop*) &_garbageCollectorMXBean_klass); | |
| 184 f->do_oop((oop*) &_managementFactory_klass); | |
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185 f->do_oop((oop*) &_garbageCollectorImpl_klass); |
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186 f->do_oop((oop*) &_gcInfo_klass); |
| 0 | 187 } |
| 188 | |
| 189 klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { | |
| 190 if (_threadInfo_klass == NULL) { | |
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191 _threadInfo_klass = load_and_initialize_klass(vmSymbols::java_lang_management_ThreadInfo(), CHECK_NULL); |
| 0 | 192 } |
| 193 return _threadInfo_klass; | |
| 194 } | |
| 195 | |
| 196 klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) { | |
| 197 if (_memoryUsage_klass == NULL) { | |
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198 _memoryUsage_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryUsage(), CHECK_NULL); |
| 0 | 199 } |
| 200 return _memoryUsage_klass; | |
| 201 } | |
| 202 | |
| 203 klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { | |
| 204 if (_memoryPoolMXBean_klass == NULL) { | |
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205 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); |
| 0 | 206 } |
| 207 return _memoryPoolMXBean_klass; | |
| 208 } | |
| 209 | |
| 210 klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { | |
| 211 if (_memoryManagerMXBean_klass == NULL) { | |
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212 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); |
| 0 | 213 } |
| 214 return _memoryManagerMXBean_klass; | |
| 215 } | |
| 216 | |
| 217 klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { | |
| 218 if (_garbageCollectorMXBean_klass == NULL) { | |
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219 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbols::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); |
| 0 | 220 } |
| 221 return _garbageCollectorMXBean_klass; | |
| 222 } | |
| 223 | |
| 224 klassOop Management::sun_management_Sensor_klass(TRAPS) { | |
| 225 if (_sensor_klass == NULL) { | |
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226 _sensor_klass = load_and_initialize_klass(vmSymbols::sun_management_Sensor(), CHECK_NULL); |
| 0 | 227 } |
| 228 return _sensor_klass; | |
| 229 } | |
| 230 | |
| 231 klassOop Management::sun_management_ManagementFactory_klass(TRAPS) { | |
| 232 if (_managementFactory_klass == NULL) { | |
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233 _managementFactory_klass = load_and_initialize_klass(vmSymbols::sun_management_ManagementFactory(), CHECK_NULL); |
| 0 | 234 } |
| 235 return _managementFactory_klass; | |
| 236 } | |
| 237 | |
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238 klassOop Management::sun_management_GarbageCollectorImpl_klass(TRAPS) { |
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239 if (_garbageCollectorImpl_klass == NULL) { |
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240 _garbageCollectorImpl_klass = load_and_initialize_klass(vmSymbols::sun_management_GarbageCollectorImpl(), CHECK_NULL); |
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241 } |
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242 return _garbageCollectorImpl_klass; |
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243 } |
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244 |
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245 klassOop Management::com_sun_management_GcInfo_klass(TRAPS) { |
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246 if (_gcInfo_klass == NULL) { |
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247 _gcInfo_klass = load_and_initialize_klass(vmSymbols::com_sun_management_GcInfo(), CHECK_NULL); |
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248 } |
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249 return _gcInfo_klass; |
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250 } |
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251 |
| 0 | 252 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { |
| 253 Handle snapshot_thread(THREAD, snapshot->threadObj()); | |
| 254 | |
| 255 jlong contended_time; | |
| 256 jlong waited_time; | |
| 257 if (ThreadService::is_thread_monitoring_contention()) { | |
| 258 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); | |
| 259 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); | |
| 260 } else { | |
| 261 // set them to -1 if thread contention monitoring is disabled. | |
| 262 contended_time = max_julong; | |
| 263 waited_time = max_julong; | |
| 264 } | |
| 265 | |
| 266 int thread_status = snapshot->thread_status(); | |
| 267 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); | |
| 268 if (snapshot->is_ext_suspended()) { | |
| 269 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; | |
| 270 } | |
| 271 if (snapshot->is_in_native()) { | |
| 272 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; | |
| 273 } | |
| 274 | |
| 275 ThreadStackTrace* st = snapshot->get_stack_trace(); | |
| 276 Handle stacktrace_h; | |
| 277 if (st != NULL) { | |
| 278 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); | |
| 279 } else { | |
| 280 stacktrace_h = Handle(); | |
| 281 } | |
| 282 | |
| 283 args->push_oop(snapshot_thread); | |
| 284 args->push_int(thread_status); | |
| 285 args->push_oop(Handle(THREAD, snapshot->blocker_object())); | |
| 286 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); | |
| 287 args->push_long(snapshot->contended_enter_count()); | |
| 288 args->push_long(contended_time); | |
| 289 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); | |
| 290 args->push_long(waited_time); | |
| 291 args->push_oop(stacktrace_h); | |
| 292 } | |
| 293 | |
| 294 // Helper function to construct a ThreadInfo object | |
| 295 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { | |
| 296 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 297 instanceKlassHandle ik (THREAD, k); | |
| 298 | |
| 299 JavaValue result(T_VOID); | |
| 300 JavaCallArguments args(14); | |
| 301 | |
| 302 // First allocate a ThreadObj object and | |
| 303 // push the receiver as the first argument | |
| 304 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
| 305 args.push_oop(element); | |
| 306 | |
| 307 // initialize the arguments for the ThreadInfo constructor | |
| 308 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
| 309 | |
| 310 // Call ThreadInfo constructor with no locked monitors and synchronizers | |
| 311 JavaCalls::call_special(&result, | |
| 312 ik, | |
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313 vmSymbols::object_initializer_name(), |
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314 vmSymbols::java_lang_management_ThreadInfo_constructor_signature(), |
| 0 | 315 &args, |
| 316 CHECK_NULL); | |
| 317 | |
| 318 return (instanceOop) element(); | |
| 319 } | |
| 320 | |
| 321 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, | |
| 322 objArrayHandle monitors_array, | |
| 323 typeArrayHandle depths_array, | |
| 324 objArrayHandle synchronizers_array, | |
| 325 TRAPS) { | |
| 326 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 327 instanceKlassHandle ik (THREAD, k); | |
| 328 | |
| 329 JavaValue result(T_VOID); | |
| 330 JavaCallArguments args(17); | |
| 331 | |
| 332 // First allocate a ThreadObj object and | |
| 333 // push the receiver as the first argument | |
| 334 Handle element = ik->allocate_instance_handle(CHECK_NULL); | |
| 335 args.push_oop(element); | |
| 336 | |
| 337 // initialize the arguments for the ThreadInfo constructor | |
| 338 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); | |
| 339 | |
| 340 // push the locked monitors and synchronizers in the arguments | |
| 341 args.push_oop(monitors_array); | |
| 342 args.push_oop(depths_array); | |
| 343 args.push_oop(synchronizers_array); | |
| 344 | |
| 345 // Call ThreadInfo constructor with locked monitors and synchronizers | |
| 346 JavaCalls::call_special(&result, | |
| 347 ik, | |
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348 vmSymbols::object_initializer_name(), |
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349 vmSymbols::java_lang_management_ThreadInfo_with_locks_constructor_signature(), |
| 0 | 350 &args, |
| 351 CHECK_NULL); | |
| 352 | |
| 353 return (instanceOop) element(); | |
| 354 } | |
| 355 | |
| 356 // Helper functions | |
| 357 static JavaThread* find_java_thread_from_id(jlong thread_id) { | |
| 358 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); | |
| 359 | |
| 360 JavaThread* java_thread = NULL; | |
| 361 // Sequential search for now. Need to do better optimization later. | |
| 362 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 363 oop tobj = thread->threadObj(); | |
| 364 if (!thread->is_exiting() && | |
| 365 tobj != NULL && | |
| 366 thread_id == java_lang_Thread::thread_id(tobj)) { | |
| 367 java_thread = thread; | |
| 368 break; | |
| 369 } | |
| 370 } | |
| 371 return java_thread; | |
| 372 } | |
| 373 | |
| 374 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { | |
| 375 if (mgr == NULL) { | |
| 376 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 377 } | |
| 378 oop mgr_obj = JNIHandles::resolve(mgr); | |
| 379 instanceHandle h(THREAD, (instanceOop) mgr_obj); | |
| 380 | |
| 381 klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); | |
| 382 if (!h->is_a(k)) { | |
| 383 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 384 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", | |
| 385 NULL); | |
| 386 } | |
| 387 | |
| 388 MemoryManager* gc = MemoryService::get_memory_manager(h); | |
| 389 if (gc == NULL || !gc->is_gc_memory_manager()) { | |
| 390 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 391 "Invalid GC memory manager", | |
| 392 NULL); | |
| 393 } | |
| 394 return (GCMemoryManager*) gc; | |
| 395 } | |
| 396 | |
| 397 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { | |
| 398 if (obj == NULL) { | |
| 399 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 400 } | |
| 401 | |
| 402 oop pool_obj = JNIHandles::resolve(obj); | |
| 403 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
| 404 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
| 405 | |
| 406 return MemoryService::get_memory_pool(ph); | |
| 407 } | |
| 408 | |
| 409 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { | |
| 410 int num_threads = ids_ah->length(); | |
| 411 | |
| 412 // Validate input thread IDs | |
| 413 int i = 0; | |
| 414 for (i = 0; i < num_threads; i++) { | |
| 415 jlong tid = ids_ah->long_at(i); | |
| 416 if (tid <= 0) { | |
| 417 // throw exception if invalid thread id. | |
| 418 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 419 "Invalid thread ID entry"); | |
| 420 } | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { | |
| 425 // check if the element of infoArray is of type ThreadInfo class | |
| 426 klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); | |
| 427 klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass(); | |
| 428 if (element_klass != threadinfo_klass) { | |
| 429 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 430 "infoArray element type is not ThreadInfo class"); | |
| 431 } | |
| 432 } | |
| 433 | |
| 434 | |
| 435 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { | |
| 436 if (obj == NULL) { | |
| 437 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
| 438 } | |
| 439 | |
| 440 oop mgr_obj = JNIHandles::resolve(obj); | |
| 441 assert(mgr_obj->is_instance(), "Should be an instanceOop"); | |
| 442 instanceHandle mh(THREAD, (instanceOop) mgr_obj); | |
| 443 | |
| 444 return MemoryService::get_memory_manager(mh); | |
| 445 } | |
| 446 | |
| 447 // Returns a version string and sets major and minor version if | |
| 448 // the input parameters are non-null. | |
| 449 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) | |
| 450 return JMM_VERSION; | |
| 451 JVM_END | |
| 452 | |
| 453 // Gets the list of VM monitoring and management optional supports | |
| 454 // Returns 0 if succeeded; otherwise returns non-zero. | |
| 455 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) | |
| 456 if (support == NULL) { | |
| 457 return -1; | |
| 458 } | |
| 459 Management::get_optional_support(support); | |
| 460 return 0; | |
| 461 JVM_END | |
| 462 | |
| 463 // Returns a java.lang.String object containing the input arguments to the VM. | |
| 464 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) | |
| 465 ResourceMark rm(THREAD); | |
| 466 | |
| 467 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
| 468 return NULL; | |
| 469 } | |
| 470 | |
| 471 char** vm_flags = Arguments::jvm_flags_array(); | |
| 472 char** vm_args = Arguments::jvm_args_array(); | |
| 473 int num_flags = Arguments::num_jvm_flags(); | |
| 474 int num_args = Arguments::num_jvm_args(); | |
| 475 | |
| 476 size_t length = 1; // null terminator | |
| 477 int i; | |
| 478 for (i = 0; i < num_flags; i++) { | |
| 479 length += strlen(vm_flags[i]); | |
| 480 } | |
| 481 for (i = 0; i < num_args; i++) { | |
| 482 length += strlen(vm_args[i]); | |
| 483 } | |
| 484 // add a space between each argument | |
| 485 length += num_flags + num_args - 1; | |
| 486 | |
| 487 // Return the list of input arguments passed to the VM | |
| 488 // and preserve the order that the VM processes. | |
| 489 char* args = NEW_RESOURCE_ARRAY(char, length); | |
| 490 args[0] = '\0'; | |
| 491 // concatenate all jvm_flags | |
| 492 if (num_flags > 0) { | |
| 493 strcat(args, vm_flags[0]); | |
| 494 for (i = 1; i < num_flags; i++) { | |
| 495 strcat(args, " "); | |
| 496 strcat(args, vm_flags[i]); | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 if (num_args > 0 && num_flags > 0) { | |
| 501 // append a space if args already contains one or more jvm_flags | |
| 502 strcat(args, " "); | |
| 503 } | |
| 504 | |
| 505 // concatenate all jvm_args | |
| 506 if (num_args > 0) { | |
| 507 strcat(args, vm_args[0]); | |
| 508 for (i = 1; i < num_args; i++) { | |
| 509 strcat(args, " "); | |
| 510 strcat(args, vm_args[i]); | |
| 511 } | |
| 512 } | |
| 513 | |
| 514 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); | |
| 515 return JNIHandles::make_local(env, hargs()); | |
| 516 JVM_END | |
| 517 | |
| 518 // Returns an array of java.lang.String object containing the input arguments to the VM. | |
| 519 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) | |
| 520 ResourceMark rm(THREAD); | |
| 521 | |
| 522 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { | |
| 523 return NULL; | |
| 524 } | |
| 525 | |
| 526 char** vm_flags = Arguments::jvm_flags_array(); | |
| 527 char** vm_args = Arguments::jvm_args_array(); | |
| 528 int num_flags = Arguments::num_jvm_flags(); | |
| 529 int num_args = Arguments::num_jvm_args(); | |
| 530 | |
| 1142 | 531 instanceKlassHandle ik (THREAD, SystemDictionary::String_klass()); |
| 0 | 532 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); |
| 533 objArrayHandle result_h(THREAD, r); | |
| 534 | |
| 535 int index = 0; | |
| 536 for (int j = 0; j < num_flags; j++, index++) { | |
| 537 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); | |
| 538 result_h->obj_at_put(index, h()); | |
| 539 } | |
| 540 for (int i = 0; i < num_args; i++, index++) { | |
| 541 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); | |
| 542 result_h->obj_at_put(index, h()); | |
| 543 } | |
| 544 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
| 545 JVM_END | |
| 546 | |
| 547 // Returns an array of java/lang/management/MemoryPoolMXBean object | |
| 548 // one for each memory pool if obj == null; otherwise returns | |
| 549 // an array of memory pools for a given memory manager if | |
| 550 // it is a valid memory manager. | |
| 551 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) | |
| 552 ResourceMark rm(THREAD); | |
| 553 | |
| 554 int num_memory_pools; | |
| 555 MemoryManager* mgr = NULL; | |
| 556 if (obj == NULL) { | |
| 557 num_memory_pools = MemoryService::num_memory_pools(); | |
| 558 } else { | |
| 559 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); | |
| 560 if (mgr == NULL) { | |
| 561 return NULL; | |
| 562 } | |
| 563 num_memory_pools = mgr->num_memory_pools(); | |
| 564 } | |
| 565 | |
| 566 // Allocate the resulting MemoryPoolMXBean[] object | |
| 567 klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); | |
| 568 instanceKlassHandle ik (THREAD, k); | |
| 569 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); | |
| 570 objArrayHandle poolArray(THREAD, r); | |
| 571 | |
| 572 if (mgr == NULL) { | |
| 573 // Get all memory pools | |
| 574 for (int i = 0; i < num_memory_pools; i++) { | |
| 575 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
| 576 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
| 577 instanceHandle ph(THREAD, p); | |
| 578 poolArray->obj_at_put(i, ph()); | |
| 579 } | |
| 580 } else { | |
| 581 // Get memory pools managed by a given memory manager | |
| 582 for (int i = 0; i < num_memory_pools; i++) { | |
| 583 MemoryPool* pool = mgr->get_memory_pool(i); | |
| 584 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); | |
| 585 instanceHandle ph(THREAD, p); | |
| 586 poolArray->obj_at_put(i, ph()); | |
| 587 } | |
| 588 } | |
| 589 return (jobjectArray) JNIHandles::make_local(env, poolArray()); | |
| 590 JVM_END | |
| 591 | |
| 592 // Returns an array of java/lang/management/MemoryManagerMXBean object | |
| 593 // one for each memory manager if obj == null; otherwise returns | |
| 594 // an array of memory managers for a given memory pool if | |
| 595 // it is a valid memory pool. | |
| 596 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) | |
| 597 ResourceMark rm(THREAD); | |
| 598 | |
| 599 int num_mgrs; | |
| 600 MemoryPool* pool = NULL; | |
| 601 if (obj == NULL) { | |
| 602 num_mgrs = MemoryService::num_memory_managers(); | |
| 603 } else { | |
| 604 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 605 if (pool == NULL) { | |
| 606 return NULL; | |
| 607 } | |
| 608 num_mgrs = pool->num_memory_managers(); | |
| 609 } | |
| 610 | |
| 611 // Allocate the resulting MemoryManagerMXBean[] object | |
| 612 klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); | |
| 613 instanceKlassHandle ik (THREAD, k); | |
| 614 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); | |
| 615 objArrayHandle mgrArray(THREAD, r); | |
| 616 | |
| 617 if (pool == NULL) { | |
| 618 // Get all memory managers | |
| 619 for (int i = 0; i < num_mgrs; i++) { | |
| 620 MemoryManager* mgr = MemoryService::get_memory_manager(i); | |
| 621 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
| 622 instanceHandle ph(THREAD, p); | |
| 623 mgrArray->obj_at_put(i, ph()); | |
| 624 } | |
| 625 } else { | |
| 626 // Get memory managers for a given memory pool | |
| 627 for (int i = 0; i < num_mgrs; i++) { | |
| 628 MemoryManager* mgr = pool->get_memory_manager(i); | |
| 629 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); | |
| 630 instanceHandle ph(THREAD, p); | |
| 631 mgrArray->obj_at_put(i, ph()); | |
| 632 } | |
| 633 } | |
| 634 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); | |
| 635 JVM_END | |
| 636 | |
| 637 | |
| 638 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 639 // of a given memory pool. | |
| 640 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
| 641 ResourceMark rm(THREAD); | |
| 642 | |
| 643 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 644 if (pool != NULL) { | |
| 645 MemoryUsage usage = pool->get_memory_usage(); | |
| 646 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 647 return JNIHandles::make_local(env, h()); | |
| 648 } else { | |
| 649 return NULL; | |
| 650 } | |
| 651 JVM_END | |
| 652 | |
| 653 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 654 // of a given memory pool. | |
| 655 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) | |
| 656 ResourceMark rm(THREAD); | |
| 657 | |
| 658 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 659 if (pool != NULL) { | |
| 660 MemoryUsage usage = pool->get_peak_memory_usage(); | |
| 661 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 662 return JNIHandles::make_local(env, h()); | |
| 663 } else { | |
| 664 return NULL; | |
| 665 } | |
| 666 JVM_END | |
| 667 | |
| 668 // Returns a java/lang/management/MemoryUsage object containing the memory usage | |
| 669 // of a given memory pool after most recent GC. | |
| 670 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) | |
| 671 ResourceMark rm(THREAD); | |
| 672 | |
| 673 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); | |
| 674 if (pool != NULL && pool->is_collected_pool()) { | |
| 675 MemoryUsage usage = pool->get_last_collection_usage(); | |
| 676 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 677 return JNIHandles::make_local(env, h()); | |
| 678 } else { | |
| 679 return NULL; | |
| 680 } | |
| 681 JVM_END | |
| 682 | |
| 683 // Sets the memory pool sensor for a threshold type | |
| 684 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) | |
| 685 if (obj == NULL || sensorObj == NULL) { | |
| 686 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 687 } | |
| 688 | |
| 689 klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK); | |
| 690 oop s = JNIHandles::resolve(sensorObj); | |
| 691 assert(s->is_instance(), "Sensor should be an instanceOop"); | |
| 692 instanceHandle sensor_h(THREAD, (instanceOop) s); | |
| 693 if (!sensor_h->is_a(sensor_klass)) { | |
| 694 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 695 "Sensor is not an instance of sun.management.Sensor class"); | |
| 696 } | |
| 697 | |
| 698 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); | |
| 699 assert(mpool != NULL, "MemoryPool should exist"); | |
| 700 | |
| 701 switch (type) { | |
| 702 case JMM_USAGE_THRESHOLD_HIGH: | |
| 703 case JMM_USAGE_THRESHOLD_LOW: | |
| 704 // have only one sensor for threshold high and low | |
| 705 mpool->set_usage_sensor_obj(sensor_h); | |
| 706 break; | |
| 707 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
| 708 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
| 709 // have only one sensor for threshold high and low | |
| 710 mpool->set_gc_usage_sensor_obj(sensor_h); | |
| 711 break; | |
| 712 default: | |
| 713 assert(false, "Unrecognized type"); | |
| 714 } | |
| 715 | |
| 716 JVM_END | |
| 717 | |
| 718 | |
| 719 // Sets the threshold of a given memory pool. | |
| 720 // Returns the previous threshold. | |
| 721 // | |
| 722 // Input parameters: | |
| 723 // pool - the MemoryPoolMXBean object | |
| 724 // type - threshold type | |
| 725 // threshold - the new threshold (must not be negative) | |
| 726 // | |
| 727 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) | |
| 728 if (threshold < 0) { | |
| 729 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 730 "Invalid threshold value", | |
| 731 -1); | |
| 732 } | |
| 733 | |
|
489
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734 if ((size_t)threshold > max_uintx) { |
|
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735 stringStream st; |
|
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736 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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737 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), st.as_string(), -1); |
| 0 | 738 } |
| 739 | |
| 740 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); | |
| 741 assert(pool != NULL, "MemoryPool should exist"); | |
| 742 | |
| 743 jlong prev = 0; | |
| 744 switch (type) { | |
| 745 case JMM_USAGE_THRESHOLD_HIGH: | |
| 746 if (!pool->usage_threshold()->is_high_threshold_supported()) { | |
| 747 return -1; | |
| 748 } | |
| 749 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); | |
| 750 break; | |
| 751 | |
| 752 case JMM_USAGE_THRESHOLD_LOW: | |
| 753 if (!pool->usage_threshold()->is_low_threshold_supported()) { | |
| 754 return -1; | |
| 755 } | |
| 756 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); | |
| 757 break; | |
| 758 | |
| 759 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: | |
| 760 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { | |
| 761 return -1; | |
| 762 } | |
| 763 // return and the new threshold is effective for the next GC | |
| 764 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); | |
| 765 | |
| 766 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: | |
| 767 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { | |
| 768 return -1; | |
| 769 } | |
| 770 // return and the new threshold is effective for the next GC | |
| 771 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); | |
| 772 | |
| 773 default: | |
| 774 assert(false, "Unrecognized type"); | |
| 775 return -1; | |
| 776 } | |
| 777 | |
| 778 // When the threshold is changed, reevaluate if the low memory | |
| 779 // detection is enabled. | |
| 780 if (prev != threshold) { | |
| 781 LowMemoryDetector::recompute_enabled_for_collected_pools(); | |
| 782 LowMemoryDetector::detect_low_memory(pool); | |
| 783 } | |
| 784 return prev; | |
| 785 JVM_END | |
| 786 | |
|
2100
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787 // Gets an array containing the amount of memory allocated on the Java |
|
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|
788 // heap for a set of threads (in bytes). Each element of the array is |
|
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789 // the amount of memory allocated for the thread ID specified in the |
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790 // corresponding entry in the given array of thread IDs; or -1 if the |
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791 // thread does not exist or has terminated. |
|
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792 JVM_ENTRY(void, jmm_GetThreadAllocatedMemory(JNIEnv *env, jlongArray ids, |
|
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793 jlongArray sizeArray)) |
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794 // Check if threads is null |
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795 if (ids == NULL || sizeArray == NULL) { |
|
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796 THROW(vmSymbols::java_lang_NullPointerException()); |
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797 } |
|
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|
798 |
|
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|
799 ResourceMark rm(THREAD); |
|
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800 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
|
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801 typeArrayHandle ids_ah(THREAD, ta); |
|
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|
802 |
|
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803 typeArrayOop sa = typeArrayOop(JNIHandles::resolve_non_null(sizeArray)); |
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804 typeArrayHandle sizeArray_h(THREAD, sa); |
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805 |
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806 // validate the thread id array |
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807 validate_thread_id_array(ids_ah, CHECK); |
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808 |
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809 // sizeArray must be of the same length as the given array of thread IDs |
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810 int num_threads = ids_ah->length(); |
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811 if (num_threads != sizeArray_h->length()) { |
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812 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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813 "The length of the given long array does not match the length of " |
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814 "the given array of thread IDs"); |
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815 } |
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816 |
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817 MutexLockerEx ml(Threads_lock); |
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818 for (int i = 0; i < num_threads; i++) { |
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819 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); |
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820 if (java_thread != NULL) { |
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821 sizeArray_h->long_at_put(i, java_thread->cooked_allocated_bytes()); |
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822 } |
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823 } |
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824 JVM_END |
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825 |
| 0 | 826 // Returns a java/lang/management/MemoryUsage object representing |
| 827 // the memory usage for the heap or non-heap memory. | |
| 828 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) | |
| 829 ResourceMark rm(THREAD); | |
| 830 | |
| 831 // Calculate the memory usage | |
| 832 size_t total_init = 0; | |
| 833 size_t total_used = 0; | |
| 834 size_t total_committed = 0; | |
| 835 size_t total_max = 0; | |
| 836 bool has_undefined_init_size = false; | |
| 837 bool has_undefined_max_size = false; | |
| 838 | |
| 839 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { | |
| 840 MemoryPool* pool = MemoryService::get_memory_pool(i); | |
| 841 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { | |
| 842 MemoryUsage u = pool->get_memory_usage(); | |
| 843 total_used += u.used(); | |
| 844 total_committed += u.committed(); | |
| 845 | |
| 846 // if any one of the memory pool has undefined init_size or max_size, | |
| 847 // set it to -1 | |
| 848 if (u.init_size() == (size_t)-1) { | |
| 849 has_undefined_init_size = true; | |
| 850 } | |
| 851 if (!has_undefined_init_size) { | |
| 852 total_init += u.init_size(); | |
| 853 } | |
| 854 | |
| 855 if (u.max_size() == (size_t)-1) { | |
| 856 has_undefined_max_size = true; | |
| 857 } | |
| 858 if (!has_undefined_max_size) { | |
| 859 total_max += u.max_size(); | |
| 860 } | |
| 861 } | |
| 862 } | |
| 863 | |
|
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864 // In our current implementation, we make sure that all non-heap |
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865 // pools have defined init and max sizes. Heap pools do not matter, |
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866 // as we never use total_init and total_max for them. |
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867 assert(heap || !has_undefined_init_size, "Undefined init size"); |
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868 assert(heap || !has_undefined_max_size, "Undefined max size"); |
| 0 | 869 |
| 1064 | 870 MemoryUsage usage((heap ? InitialHeapSize : total_init), |
| 0 | 871 total_used, |
| 872 total_committed, | |
| 873 (heap ? Universe::heap()->max_capacity() : total_max)); | |
| 874 | |
| 875 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); | |
| 876 return JNIHandles::make_local(env, obj()); | |
| 877 JVM_END | |
| 878 | |
| 879 // Returns the boolean value of a given attribute. | |
| 880 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) | |
| 881 switch (att) { | |
| 882 case JMM_VERBOSE_GC: | |
| 883 return MemoryService::get_verbose(); | |
| 884 case JMM_VERBOSE_CLASS: | |
| 885 return ClassLoadingService::get_verbose(); | |
| 886 case JMM_THREAD_CONTENTION_MONITORING: | |
| 887 return ThreadService::is_thread_monitoring_contention(); | |
| 888 case JMM_THREAD_CPU_TIME: | |
| 889 return ThreadService::is_thread_cpu_time_enabled(); | |
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890 case JMM_THREAD_ALLOCATED_MEMORY: |
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891 return ThreadService::is_thread_allocated_memory_enabled(); |
| 0 | 892 default: |
| 893 assert(0, "Unrecognized attribute"); | |
| 894 return false; | |
| 895 } | |
| 896 JVM_END | |
| 897 | |
| 898 // Sets the given boolean attribute and returns the previous value. | |
| 899 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) | |
| 900 switch (att) { | |
| 901 case JMM_VERBOSE_GC: | |
| 902 return MemoryService::set_verbose(flag != 0); | |
| 903 case JMM_VERBOSE_CLASS: | |
| 904 return ClassLoadingService::set_verbose(flag != 0); | |
| 905 case JMM_THREAD_CONTENTION_MONITORING: | |
| 906 return ThreadService::set_thread_monitoring_contention(flag != 0); | |
| 907 case JMM_THREAD_CPU_TIME: | |
| 908 return ThreadService::set_thread_cpu_time_enabled(flag != 0); | |
|
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909 case JMM_THREAD_ALLOCATED_MEMORY: |
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910 return ThreadService::set_thread_allocated_memory_enabled(flag != 0); |
| 0 | 911 default: |
| 912 assert(0, "Unrecognized attribute"); | |
| 913 return false; | |
| 914 } | |
| 915 JVM_END | |
| 916 | |
| 917 | |
| 918 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { | |
| 919 switch (att) { | |
| 920 case JMM_GC_TIME_MS: | |
| 921 return mgr->gc_time_ms(); | |
| 922 | |
| 923 case JMM_GC_COUNT: | |
| 924 return mgr->gc_count(); | |
| 925 | |
| 926 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: | |
| 927 // current implementation only has 1 ext attribute | |
| 928 return 1; | |
| 929 | |
| 930 default: | |
| 931 assert(0, "Unrecognized GC attribute"); | |
| 932 return -1; | |
| 933 } | |
| 934 } | |
| 935 | |
| 936 class VmThreadCountClosure: public ThreadClosure { | |
| 937 private: | |
| 938 int _count; | |
| 939 public: | |
| 940 VmThreadCountClosure() : _count(0) {}; | |
| 941 void do_thread(Thread* thread); | |
| 942 int count() { return _count; } | |
| 943 }; | |
| 944 | |
| 945 void VmThreadCountClosure::do_thread(Thread* thread) { | |
| 946 // exclude externally visible JavaThreads | |
| 947 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
| 948 return; | |
| 949 } | |
| 950 | |
| 951 _count++; | |
| 952 } | |
| 953 | |
| 954 static jint get_vm_thread_count() { | |
| 955 VmThreadCountClosure vmtcc; | |
| 956 { | |
| 957 MutexLockerEx ml(Threads_lock); | |
| 958 Threads::threads_do(&vmtcc); | |
| 959 } | |
| 960 | |
| 961 return vmtcc.count(); | |
| 962 } | |
| 963 | |
| 964 static jint get_num_flags() { | |
| 965 // last flag entry is always NULL, so subtract 1 | |
| 966 int nFlags = (int) Flag::numFlags - 1; | |
| 967 int count = 0; | |
| 968 for (int i = 0; i < nFlags; i++) { | |
| 969 Flag* flag = &Flag::flags[i]; | |
| 350 | 970 // Exclude the locked (diagnostic, experimental) flags |
| 0 | 971 if (flag->is_unlocked() || flag->is_unlocker()) { |
| 972 count++; | |
| 973 } | |
| 974 } | |
| 975 return count; | |
| 976 } | |
| 977 | |
| 978 static jlong get_long_attribute(jmmLongAttribute att) { | |
| 979 switch (att) { | |
| 980 case JMM_CLASS_LOADED_COUNT: | |
| 981 return ClassLoadingService::loaded_class_count(); | |
| 982 | |
| 983 case JMM_CLASS_UNLOADED_COUNT: | |
| 984 return ClassLoadingService::unloaded_class_count(); | |
| 985 | |
| 986 case JMM_THREAD_TOTAL_COUNT: | |
| 987 return ThreadService::get_total_thread_count(); | |
| 988 | |
| 989 case JMM_THREAD_LIVE_COUNT: | |
| 990 return ThreadService::get_live_thread_count(); | |
| 991 | |
| 992 case JMM_THREAD_PEAK_COUNT: | |
| 993 return ThreadService::get_peak_thread_count(); | |
| 994 | |
| 995 case JMM_THREAD_DAEMON_COUNT: | |
| 996 return ThreadService::get_daemon_thread_count(); | |
| 997 | |
| 998 case JMM_JVM_INIT_DONE_TIME_MS: | |
| 999 return Management::vm_init_done_time(); | |
| 1000 | |
| 1001 case JMM_COMPILE_TOTAL_TIME_MS: | |
| 1002 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); | |
| 1003 | |
| 1004 case JMM_OS_PROCESS_ID: | |
| 1005 return os::current_process_id(); | |
| 1006 | |
| 1007 // Hotspot-specific counters | |
| 1008 case JMM_CLASS_LOADED_BYTES: | |
| 1009 return ClassLoadingService::loaded_class_bytes(); | |
| 1010 | |
| 1011 case JMM_CLASS_UNLOADED_BYTES: | |
| 1012 return ClassLoadingService::unloaded_class_bytes(); | |
| 1013 | |
| 1014 case JMM_SHARED_CLASS_LOADED_COUNT: | |
| 1015 return ClassLoadingService::loaded_shared_class_count(); | |
| 1016 | |
| 1017 case JMM_SHARED_CLASS_UNLOADED_COUNT: | |
| 1018 return ClassLoadingService::unloaded_shared_class_count(); | |
| 1019 | |
| 1020 | |
| 1021 case JMM_SHARED_CLASS_LOADED_BYTES: | |
| 1022 return ClassLoadingService::loaded_shared_class_bytes(); | |
| 1023 | |
| 1024 case JMM_SHARED_CLASS_UNLOADED_BYTES: | |
| 1025 return ClassLoadingService::unloaded_shared_class_bytes(); | |
| 1026 | |
| 1027 case JMM_TOTAL_CLASSLOAD_TIME_MS: | |
| 1028 return ClassLoader::classloader_time_ms(); | |
| 1029 | |
| 1030 case JMM_VM_GLOBAL_COUNT: | |
| 1031 return get_num_flags(); | |
| 1032 | |
| 1033 case JMM_SAFEPOINT_COUNT: | |
| 1034 return RuntimeService::safepoint_count(); | |
| 1035 | |
| 1036 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: | |
| 1037 return RuntimeService::safepoint_sync_time_ms(); | |
| 1038 | |
| 1039 case JMM_TOTAL_STOPPED_TIME_MS: | |
| 1040 return RuntimeService::safepoint_time_ms(); | |
| 1041 | |
| 1042 case JMM_TOTAL_APP_TIME_MS: | |
| 1043 return RuntimeService::application_time_ms(); | |
| 1044 | |
| 1045 case JMM_VM_THREAD_COUNT: | |
| 1046 return get_vm_thread_count(); | |
| 1047 | |
| 1048 case JMM_CLASS_INIT_TOTAL_COUNT: | |
| 1049 return ClassLoader::class_init_count(); | |
| 1050 | |
| 1051 case JMM_CLASS_INIT_TOTAL_TIME_MS: | |
| 1052 return ClassLoader::class_init_time_ms(); | |
| 1053 | |
| 1054 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: | |
| 1055 return ClassLoader::class_verify_time_ms(); | |
| 1056 | |
| 1057 case JMM_METHOD_DATA_SIZE_BYTES: | |
| 1058 return ClassLoadingService::class_method_data_size(); | |
| 1059 | |
| 1060 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: | |
| 1061 return os::physical_memory(); | |
| 1062 | |
| 1063 default: | |
| 1064 return -1; | |
| 1065 } | |
| 1066 } | |
| 1067 | |
| 1068 | |
| 1069 // Returns the long value of a given attribute. | |
| 1070 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) | |
| 1071 if (obj == NULL) { | |
| 1072 return get_long_attribute(att); | |
| 1073 } else { | |
| 1074 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); | |
| 1075 if (mgr != NULL) { | |
| 1076 return get_gc_attribute(mgr, att); | |
| 1077 } | |
| 1078 } | |
| 1079 return -1; | |
| 1080 JVM_END | |
| 1081 | |
| 1082 // Gets the value of all attributes specified in the given array | |
| 1083 // and sets the value in the result array. | |
| 1084 // Returns the number of attributes found. | |
| 1085 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, | |
| 1086 jobject obj, | |
| 1087 jmmLongAttribute* atts, | |
| 1088 jint count, | |
| 1089 jlong* result)) | |
| 1090 | |
| 1091 int num_atts = 0; | |
| 1092 if (obj == NULL) { | |
| 1093 for (int i = 0; i < count; i++) { | |
| 1094 result[i] = get_long_attribute(atts[i]); | |
| 1095 if (result[i] != -1) { | |
| 1096 num_atts++; | |
| 1097 } | |
| 1098 } | |
| 1099 } else { | |
| 1100 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); | |
| 1101 for (int i = 0; i < count; i++) { | |
| 1102 result[i] = get_gc_attribute(mgr, atts[i]); | |
| 1103 if (result[i] != -1) { | |
| 1104 num_atts++; | |
| 1105 } | |
| 1106 } | |
| 1107 } | |
| 1108 return num_atts; | |
| 1109 JVM_END | |
| 1110 | |
| 1111 // Helper function to do thread dump for a specific list of threads | |
| 1112 static void do_thread_dump(ThreadDumpResult* dump_result, | |
| 1113 typeArrayHandle ids_ah, // array of thread ID (long[]) | |
| 1114 int num_threads, | |
| 1115 int max_depth, | |
| 1116 bool with_locked_monitors, | |
| 1117 bool with_locked_synchronizers, | |
| 1118 TRAPS) { | |
| 1119 | |
| 1120 // First get an array of threadObj handles. | |
| 1121 // A JavaThread may terminate before we get the stack trace. | |
| 1122 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
| 1123 { | |
| 1124 MutexLockerEx ml(Threads_lock); | |
| 1125 for (int i = 0; i < num_threads; i++) { | |
| 1126 jlong tid = ids_ah->long_at(i); | |
| 1127 JavaThread* jt = find_java_thread_from_id(tid); | |
| 1128 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); | |
| 1129 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); | |
| 1130 thread_handle_array->append(threadObj_h); | |
| 1131 } | |
| 1132 } | |
| 1133 | |
| 1134 // Obtain thread dumps and thread snapshot information | |
| 1135 VM_ThreadDump op(dump_result, | |
| 1136 thread_handle_array, | |
| 1137 num_threads, | |
| 1138 max_depth, /* stack depth */ | |
| 1139 with_locked_monitors, | |
| 1140 with_locked_synchronizers); | |
| 1141 VMThread::execute(&op); | |
| 1142 } | |
| 1143 | |
| 1144 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo | |
| 1145 // for the thread ID specified in the corresponding entry in | |
| 1146 // the given array of thread IDs; or NULL if the thread does not exist | |
| 1147 // or has terminated. | |
| 1148 // | |
| 1149 // Input parameters: | |
| 1150 // ids - array of thread IDs | |
| 1151 // maxDepth - the maximum depth of stack traces to be dumped: | |
| 1152 // maxDepth == -1 requests to dump entire stack trace. | |
| 1153 // maxDepth == 0 requests no stack trace. | |
| 1154 // infoArray - array of ThreadInfo objects | |
| 1155 // | |
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1156 // QQQ - Why does this method return a value instead of void? |
| 0 | 1157 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) |
| 1158 // Check if threads is null | |
| 1159 if (ids == NULL || infoArray == NULL) { | |
| 1160 THROW_(vmSymbols::java_lang_NullPointerException(), -1); | |
| 1161 } | |
| 1162 | |
| 1163 if (maxDepth < -1) { | |
| 1164 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1165 "Invalid maxDepth", -1); | |
| 1166 } | |
| 1167 | |
| 1168 ResourceMark rm(THREAD); | |
| 1169 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); | |
| 1170 typeArrayHandle ids_ah(THREAD, ta); | |
| 1171 | |
| 1172 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); | |
| 1173 objArrayOop oa = objArrayOop(infoArray_obj); | |
| 1174 objArrayHandle infoArray_h(THREAD, oa); | |
| 1175 | |
| 1176 // validate the thread id array | |
| 1177 validate_thread_id_array(ids_ah, CHECK_0); | |
| 1178 | |
| 1179 // validate the ThreadInfo[] parameters | |
| 1180 validate_thread_info_array(infoArray_h, CHECK_0); | |
| 1181 | |
| 1182 // infoArray must be of the same length as the given array of thread IDs | |
| 1183 int num_threads = ids_ah->length(); | |
| 1184 if (num_threads != infoArray_h->length()) { | |
| 1185 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1186 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); | |
| 1187 } | |
| 1188 | |
| 1189 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 1190 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
| 1191 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); | |
| 1192 } | |
| 1193 | |
| 1194 // Must use ThreadDumpResult to store the ThreadSnapshot. | |
| 1195 // GC may occur after the thread snapshots are taken but before | |
| 1196 // this function returns. The threadObj and other oops kept | |
| 1197 // in the ThreadSnapshot are marked and adjusted during GC. | |
| 1198 ThreadDumpResult dump_result(num_threads); | |
| 1199 | |
| 1200 if (maxDepth == 0) { | |
| 1201 // no stack trace dumped - do not need to stop the world | |
| 1202 { | |
| 1203 MutexLockerEx ml(Threads_lock); | |
| 1204 for (int i = 0; i < num_threads; i++) { | |
| 1205 jlong tid = ids_ah->long_at(i); | |
| 1206 JavaThread* jt = find_java_thread_from_id(tid); | |
| 1207 ThreadSnapshot* ts; | |
| 1208 if (jt == NULL) { | |
| 1209 // if the thread does not exist or now it is terminated, | |
| 1210 // create dummy snapshot | |
| 1211 ts = new ThreadSnapshot(); | |
| 1212 } else { | |
| 1213 ts = new ThreadSnapshot(jt); | |
| 1214 } | |
| 1215 dump_result.add_thread_snapshot(ts); | |
| 1216 } | |
| 1217 } | |
| 1218 } else { | |
| 1219 // obtain thread dump with the specific list of threads with stack trace | |
| 1220 do_thread_dump(&dump_result, | |
| 1221 ids_ah, | |
| 1222 num_threads, | |
| 1223 maxDepth, | |
| 1224 false, /* no locked monitor */ | |
| 1225 false, /* no locked synchronizers */ | |
| 1226 CHECK_0); | |
| 1227 } | |
| 1228 | |
| 1229 int num_snapshots = dump_result.num_snapshots(); | |
| 1230 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); | |
| 1231 int index = 0; | |
| 1232 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { | |
| 1233 // For each thread, create an java/lang/management/ThreadInfo object | |
| 1234 // and fill with the thread information | |
| 1235 | |
| 1236 if (ts->threadObj() == NULL) { | |
| 1237 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
| 1238 infoArray_h->obj_at_put(index, NULL); | |
| 1239 continue; | |
| 1240 } | |
| 1241 | |
| 1242 // Create java.lang.management.ThreadInfo object | |
| 1243 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); | |
| 1244 infoArray_h->obj_at_put(index, info_obj); | |
| 1245 } | |
| 1246 return 0; | |
| 1247 JVM_END | |
| 1248 | |
| 1249 // Dump thread info for the specified threads. | |
| 1250 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo | |
| 1251 // for the thread ID specified in the corresponding entry in | |
| 1252 // the given array of thread IDs; or NULL if the thread does not exist | |
| 1253 // or has terminated. | |
| 1254 // | |
| 1255 // Input parameter: | |
| 1256 // ids - array of thread IDs; NULL indicates all live threads | |
| 1257 // locked_monitors - if true, dump locked object monitors | |
| 1258 // locked_synchronizers - if true, dump locked JSR-166 synchronizers | |
| 1259 // | |
| 1260 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) | |
| 1261 ResourceMark rm(THREAD); | |
| 1262 | |
| 1263 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 1264 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots | |
| 1265 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); | |
| 1266 } | |
| 1267 | |
| 1268 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); | |
| 1269 int num_threads = (ta != NULL ? ta->length() : 0); | |
| 1270 typeArrayHandle ids_ah(THREAD, ta); | |
| 1271 | |
| 1272 ThreadDumpResult dump_result(num_threads); // can safepoint | |
| 1273 | |
| 1274 if (ids_ah() != NULL) { | |
| 1275 | |
| 1276 // validate the thread id array | |
| 1277 validate_thread_id_array(ids_ah, CHECK_NULL); | |
| 1278 | |
| 1279 // obtain thread dump of a specific list of threads | |
| 1280 do_thread_dump(&dump_result, | |
| 1281 ids_ah, | |
| 1282 num_threads, | |
| 1283 -1, /* entire stack */ | |
| 1284 (locked_monitors ? true : false), /* with locked monitors */ | |
| 1285 (locked_synchronizers ? true : false), /* with locked synchronizers */ | |
| 1286 CHECK_NULL); | |
| 1287 } else { | |
| 1288 // obtain thread dump of all threads | |
| 1289 VM_ThreadDump op(&dump_result, | |
| 1290 -1, /* entire stack */ | |
| 1291 (locked_monitors ? true : false), /* with locked monitors */ | |
| 1292 (locked_synchronizers ? true : false) /* with locked synchronizers */); | |
| 1293 VMThread::execute(&op); | |
| 1294 } | |
| 1295 | |
| 1296 int num_snapshots = dump_result.num_snapshots(); | |
| 1297 | |
| 1298 // create the result ThreadInfo[] object | |
| 1299 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); | |
| 1300 instanceKlassHandle ik (THREAD, k); | |
| 1301 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); | |
| 1302 objArrayHandle result_h(THREAD, r); | |
| 1303 | |
| 1304 int index = 0; | |
| 1305 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { | |
| 1306 if (ts->threadObj() == NULL) { | |
| 1307 // if the thread does not exist or now it is terminated, set threadinfo to NULL | |
| 1308 result_h->obj_at_put(index, NULL); | |
| 1309 continue; | |
| 1310 } | |
| 1311 | |
| 1312 ThreadStackTrace* stacktrace = ts->get_stack_trace(); | |
| 1313 assert(stacktrace != NULL, "Must have a stack trace dumped"); | |
| 1314 | |
| 1315 // Create Object[] filled with locked monitors | |
| 1316 // Create int[] filled with the stack depth where a monitor was locked | |
| 1317 int num_frames = stacktrace->get_stack_depth(); | |
| 1318 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); | |
| 1319 | |
| 1320 // Count the total number of locked monitors | |
| 1321 for (int i = 0; i < num_frames; i++) { | |
| 1322 StackFrameInfo* frame = stacktrace->stack_frame_at(i); | |
| 1323 num_locked_monitors += frame->num_locked_monitors(); | |
| 1324 } | |
| 1325 | |
| 1326 objArrayHandle monitors_array; | |
| 1327 typeArrayHandle depths_array; | |
| 1328 objArrayHandle synchronizers_array; | |
| 1329 | |
| 1330 if (locked_monitors) { | |
| 1331 // Constructs Object[] and int[] to contain the object monitor and the stack depth | |
| 1332 // where the thread locked it | |
|
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1333 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_monitors, CHECK_NULL); |
| 0 | 1334 objArrayHandle mh(THREAD, array); |
| 1335 monitors_array = mh; | |
| 1336 | |
| 1337 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); | |
| 1338 typeArrayHandle dh(THREAD, tarray); | |
| 1339 depths_array = dh; | |
| 1340 | |
| 1341 int count = 0; | |
| 1342 int j = 0; | |
| 1343 for (int depth = 0; depth < num_frames; depth++) { | |
| 1344 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); | |
| 1345 int len = frame->num_locked_monitors(); | |
| 1346 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); | |
| 1347 for (j = 0; j < len; j++) { | |
| 1348 oop monitor = locked_monitors->at(j); | |
| 1349 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); | |
| 1350 monitors_array->obj_at_put(count, monitor); | |
| 1351 depths_array->int_at_put(count, depth); | |
| 1352 count++; | |
| 1353 } | |
| 1354 } | |
| 1355 | |
| 1356 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); | |
| 1357 for (j = 0; j < jni_locked_monitors->length(); j++) { | |
| 1358 oop object = jni_locked_monitors->at(j); | |
| 1359 assert(object != NULL && object->is_instance(), "must be a Java object"); | |
| 1360 monitors_array->obj_at_put(count, object); | |
| 1361 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info | |
| 1362 depths_array->int_at_put(count, -1); | |
| 1363 count++; | |
| 1364 } | |
| 1365 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); | |
| 1366 } | |
| 1367 | |
| 1368 if (locked_synchronizers) { | |
| 1369 // Create Object[] filled with locked JSR-166 synchronizers | |
| 1370 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); | |
| 1371 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); | |
| 1372 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); | |
| 1373 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); | |
| 1374 | |
|
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1375 objArrayOop array = oopFactory::new_objArray(SystemDictionary::Object_klass(), num_locked_synchronizers, CHECK_NULL); |
| 0 | 1376 objArrayHandle sh(THREAD, array); |
| 1377 synchronizers_array = sh; | |
| 1378 | |
| 1379 for (int k = 0; k < num_locked_synchronizers; k++) { | |
| 1380 synchronizers_array->obj_at_put(k, locks->at(k)); | |
| 1381 } | |
| 1382 } | |
| 1383 | |
| 1384 // Create java.lang.management.ThreadInfo object | |
| 1385 instanceOop info_obj = Management::create_thread_info_instance(ts, | |
| 1386 monitors_array, | |
| 1387 depths_array, | |
| 1388 synchronizers_array, | |
| 1389 CHECK_NULL); | |
| 1390 result_h->obj_at_put(index, info_obj); | |
| 1391 } | |
| 1392 | |
| 1393 return (jobjectArray) JNIHandles::make_local(env, result_h()); | |
| 1394 JVM_END | |
| 1395 | |
| 1396 // Returns an array of Class objects. | |
| 1397 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) | |
| 1398 ResourceMark rm(THREAD); | |
| 1399 | |
| 1400 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter | |
| 1401 | |
| 1402 int num_classes = lce.num_loaded_classes(); | |
| 1142 | 1403 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), num_classes, CHECK_0); |
| 0 | 1404 objArrayHandle classes_ah(THREAD, r); |
| 1405 | |
| 1406 for (int i = 0; i < num_classes; i++) { | |
| 1407 KlassHandle kh = lce.get_klass(i); | |
| 1408 oop mirror = Klass::cast(kh())->java_mirror(); | |
| 1409 classes_ah->obj_at_put(i, mirror); | |
| 1410 } | |
| 1411 | |
| 1412 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); | |
| 1413 JVM_END | |
| 1414 | |
| 1415 // Reset statistic. Return true if the requested statistic is reset. | |
| 1416 // Otherwise, return false. | |
| 1417 // | |
| 1418 // Input parameters: | |
| 1419 // obj - specify which instance the statistic associated with to be reset | |
| 1420 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. | |
| 1421 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. | |
| 1422 // type - the type of statistic to be reset | |
| 1423 // | |
| 1424 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) | |
| 1425 ResourceMark rm(THREAD); | |
| 1426 | |
| 1427 switch (type) { | |
| 1428 case JMM_STAT_PEAK_THREAD_COUNT: | |
| 1429 ThreadService::reset_peak_thread_count(); | |
| 1430 return true; | |
| 1431 | |
| 1432 case JMM_STAT_THREAD_CONTENTION_COUNT: | |
| 1433 case JMM_STAT_THREAD_CONTENTION_TIME: { | |
| 1434 jlong tid = obj.j; | |
| 1435 if (tid < 0) { | |
| 1436 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); | |
| 1437 } | |
| 1438 | |
| 1439 // Look for the JavaThread of this given tid | |
| 1440 MutexLockerEx ml(Threads_lock); | |
| 1441 if (tid == 0) { | |
| 1442 // reset contention statistics for all threads if tid == 0 | |
| 1443 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { | |
| 1444 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
| 1445 ThreadService::reset_contention_count_stat(java_thread); | |
| 1446 } else { | |
| 1447 ThreadService::reset_contention_time_stat(java_thread); | |
| 1448 } | |
| 1449 } | |
| 1450 } else { | |
| 1451 // reset contention statistics for a given thread | |
| 1452 JavaThread* java_thread = find_java_thread_from_id(tid); | |
| 1453 if (java_thread == NULL) { | |
| 1454 return false; | |
| 1455 } | |
| 1456 | |
| 1457 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { | |
| 1458 ThreadService::reset_contention_count_stat(java_thread); | |
| 1459 } else { | |
| 1460 ThreadService::reset_contention_time_stat(java_thread); | |
| 1461 } | |
| 1462 } | |
| 1463 return true; | |
| 1464 break; | |
| 1465 } | |
| 1466 case JMM_STAT_PEAK_POOL_USAGE: { | |
| 1467 jobject o = obj.l; | |
| 1468 if (o == NULL) { | |
| 1469 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1470 } | |
| 1471 | |
| 1472 oop pool_obj = JNIHandles::resolve(o); | |
| 1473 assert(pool_obj->is_instance(), "Should be an instanceOop"); | |
| 1474 instanceHandle ph(THREAD, (instanceOop) pool_obj); | |
| 1475 | |
| 1476 MemoryPool* pool = MemoryService::get_memory_pool(ph); | |
| 1477 if (pool != NULL) { | |
| 1478 pool->reset_peak_memory_usage(); | |
| 1479 return true; | |
| 1480 } | |
| 1481 break; | |
| 1482 } | |
| 1483 case JMM_STAT_GC_STAT: { | |
| 1484 jobject o = obj.l; | |
| 1485 if (o == NULL) { | |
| 1486 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1487 } | |
| 1488 | |
| 1489 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); | |
| 1490 if (mgr != NULL) { | |
| 1491 mgr->reset_gc_stat(); | |
| 1492 return true; | |
| 1493 } | |
| 1494 break; | |
| 1495 } | |
| 1496 default: | |
| 1497 assert(0, "Unknown Statistic Type"); | |
| 1498 } | |
| 1499 return false; | |
| 1500 JVM_END | |
| 1501 | |
| 1502 // Returns the fast estimate of CPU time consumed by | |
| 1503 // a given thread (in nanoseconds). | |
| 1504 // If thread_id == 0, return CPU time for the current thread. | |
| 1505 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) | |
| 1506 if (!os::is_thread_cpu_time_supported()) { | |
| 1507 return -1; | |
| 1508 } | |
| 1509 | |
| 1510 if (thread_id < 0) { | |
| 1511 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1512 "Invalid thread ID", -1); | |
| 1513 } | |
| 1514 | |
| 1515 JavaThread* java_thread = NULL; | |
| 1516 if (thread_id == 0) { | |
| 1517 // current thread | |
| 1518 return os::current_thread_cpu_time(); | |
| 1519 } else { | |
| 1520 MutexLockerEx ml(Threads_lock); | |
| 1521 java_thread = find_java_thread_from_id(thread_id); | |
| 1522 if (java_thread != NULL) { | |
| 1523 return os::thread_cpu_time((Thread*) java_thread); | |
| 1524 } | |
| 1525 } | |
| 1526 return -1; | |
| 1527 JVM_END | |
| 1528 | |
| 1529 // Returns the CPU time consumed by a given thread (in nanoseconds). | |
| 1530 // If thread_id == 0, CPU time for the current thread is returned. | |
| 1531 // If user_sys_cpu_time = true, user level and system CPU time of | |
| 1532 // a given thread is returned; otherwise, only user level CPU time | |
| 1533 // is returned. | |
| 1534 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) | |
| 1535 if (!os::is_thread_cpu_time_supported()) { | |
| 1536 return -1; | |
| 1537 } | |
| 1538 | |
| 1539 if (thread_id < 0) { | |
| 1540 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1541 "Invalid thread ID", -1); | |
| 1542 } | |
| 1543 | |
| 1544 JavaThread* java_thread = NULL; | |
| 1545 if (thread_id == 0) { | |
| 1546 // current thread | |
| 1547 return os::current_thread_cpu_time(user_sys_cpu_time != 0); | |
| 1548 } else { | |
| 1549 MutexLockerEx ml(Threads_lock); | |
| 1550 java_thread = find_java_thread_from_id(thread_id); | |
| 1551 if (java_thread != NULL) { | |
| 1552 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); | |
| 1553 } | |
| 1554 } | |
| 1555 return -1; | |
| 1556 JVM_END | |
| 1557 | |
|
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1558 // Gets an array containing the CPU times consumed by a set of threads |
|
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1559 // (in nanoseconds). Each element of the array is the CPU time for the |
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1560 // thread ID specified in the corresponding entry in the given array |
|
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1561 // of thread IDs; or -1 if the thread does not exist or has terminated. |
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1562 // If user_sys_cpu_time = true, the sum of user level and system CPU time |
|
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1563 // for the given thread is returned; otherwise, only user level CPU time |
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1564 // is returned. |
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1565 JVM_ENTRY(void, jmm_GetThreadCpuTimesWithKind(JNIEnv *env, jlongArray ids, |
|
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1566 jlongArray timeArray, |
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1567 jboolean user_sys_cpu_time)) |
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1568 // Check if threads is null |
|
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1569 if (ids == NULL || timeArray == NULL) { |
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1570 THROW(vmSymbols::java_lang_NullPointerException()); |
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1571 } |
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1572 |
|
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1573 ResourceMark rm(THREAD); |
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1574 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
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1575 typeArrayHandle ids_ah(THREAD, ta); |
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1576 |
|
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1577 typeArrayOop tia = typeArrayOop(JNIHandles::resolve_non_null(timeArray)); |
|
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1578 typeArrayHandle timeArray_h(THREAD, tia); |
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1579 |
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1580 // validate the thread id array |
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1581 validate_thread_id_array(ids_ah, CHECK); |
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1582 |
|
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1583 // timeArray must be of the same length as the given array of thread IDs |
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1584 int num_threads = ids_ah->length(); |
|
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1585 if (num_threads != timeArray_h->length()) { |
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1586 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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1587 "The length of the given long array does not match the length of " |
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1588 "the given array of thread IDs"); |
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1589 } |
|
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1590 |
|
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1591 MutexLockerEx ml(Threads_lock); |
|
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1592 for (int i = 0; i < num_threads; i++) { |
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1593 JavaThread* java_thread = find_java_thread_from_id(ids_ah->long_at(i)); |
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1594 if (java_thread != NULL) { |
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1595 timeArray_h->long_at_put(i, os::thread_cpu_time((Thread*)java_thread, |
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1596 user_sys_cpu_time != 0)); |
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1597 } |
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1598 } |
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1599 JVM_END |
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1600 |
| 0 | 1601 // Returns a String array of all VM global flag names |
| 1602 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) | |
| 1603 // last flag entry is always NULL, so subtract 1 | |
| 1604 int nFlags = (int) Flag::numFlags - 1; | |
| 1605 // allocate a temp array | |
| 1142 | 1606 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
| 0 | 1607 nFlags, CHECK_0); |
| 1608 objArrayHandle flags_ah(THREAD, r); | |
| 1609 int num_entries = 0; | |
| 1610 for (int i = 0; i < nFlags; i++) { | |
| 1611 Flag* flag = &Flag::flags[i]; | |
| 350 | 1612 // Exclude the locked (experimental, diagnostic) flags |
| 0 | 1613 if (flag->is_unlocked() || flag->is_unlocker()) { |
| 1614 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); | |
| 1615 flags_ah->obj_at_put(num_entries, s()); | |
| 1616 num_entries++; | |
| 1617 } | |
| 1618 } | |
| 1619 | |
| 1620 if (num_entries < nFlags) { | |
| 1621 // Return array of right length | |
| 1142 | 1622 objArrayOop res = oopFactory::new_objArray(SystemDictionary::String_klass(), num_entries, CHECK_0); |
| 0 | 1623 for(int i = 0; i < num_entries; i++) { |
| 1624 res->obj_at_put(i, flags_ah->obj_at(i)); | |
| 1625 } | |
| 1626 return (jobjectArray)JNIHandles::make_local(env, res); | |
| 1627 } | |
| 1628 | |
| 1629 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); | |
| 1630 JVM_END | |
| 1631 | |
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1632 // Utility function used by jmm_GetVMGlobals. Returns false if flag type |
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1633 // can't be determined, true otherwise. If false is returned, then *global |
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1634 // will be incomplete and invalid. |
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1635 bool add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { |
| 0 | 1636 Handle flag_name; |
| 1637 if (name() == NULL) { | |
|
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1638 flag_name = java_lang_String::create_from_str(flag->name, CHECK_false); |
| 0 | 1639 } else { |
| 1640 flag_name = name; | |
| 1641 } | |
| 1642 global->name = (jstring)JNIHandles::make_local(env, flag_name()); | |
| 1643 | |
| 1644 if (flag->is_bool()) { | |
| 1645 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; | |
| 1646 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; | |
| 1647 } else if (flag->is_intx()) { | |
| 1648 global->value.j = (jlong)flag->get_intx(); | |
| 1649 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
| 1650 } else if (flag->is_uintx()) { | |
| 1651 global->value.j = (jlong)flag->get_uintx(); | |
| 1652 global->type = JMM_VMGLOBAL_TYPE_JLONG; | |
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1653 } else if (flag->is_uint64_t()) { |
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1654 global->value.j = (jlong)flag->get_uint64_t(); |
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1655 global->type = JMM_VMGLOBAL_TYPE_JLONG; |
| 0 | 1656 } else if (flag->is_ccstr()) { |
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1657 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK_false); |
| 0 | 1658 global->value.l = (jobject)JNIHandles::make_local(env, str()); |
| 1659 global->type = JMM_VMGLOBAL_TYPE_JSTRING; | |
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1660 } else { |
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1661 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; |
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1662 return false; |
| 0 | 1663 } |
| 1664 | |
| 1665 global->writeable = flag->is_writeable(); | |
| 1666 global->external = flag->is_external(); | |
| 1667 switch (flag->origin) { | |
| 1668 case DEFAULT: | |
| 1669 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; | |
| 1670 break; | |
| 1671 case COMMAND_LINE: | |
| 1672 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; | |
| 1673 break; | |
| 1674 case ENVIRON_VAR: | |
| 1675 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; | |
| 1676 break; | |
| 1677 case CONFIG_FILE: | |
| 1678 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; | |
| 1679 break; | |
| 1680 case MANAGEMENT: | |
| 1681 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; | |
| 1682 break; | |
| 1683 case ERGONOMIC: | |
| 1684 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; | |
| 1685 break; | |
| 1686 default: | |
| 1687 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; | |
| 1688 } | |
|
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1689 |
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1690 return true; |
| 0 | 1691 } |
| 1692 | |
| 1693 // Fill globals array of count length with jmmVMGlobal entries | |
| 1694 // specified by names. If names == NULL, fill globals array | |
| 1695 // with all Flags. Return value is number of entries | |
| 1696 // created in globals. | |
| 1697 // If a Flag with a given name in an array element does not | |
| 1698 // exist, globals[i].name will be set to NULL. | |
| 1699 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, | |
| 1700 jobjectArray names, | |
| 1701 jmmVMGlobal *globals, | |
| 1702 jint count)) | |
| 1703 | |
| 1704 | |
| 1705 if (globals == NULL) { | |
| 1706 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1707 } | |
| 1708 | |
| 1709 ResourceMark rm(THREAD); | |
| 1710 | |
| 1711 if (names != NULL) { | |
| 1712 // return the requested globals | |
| 1713 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); | |
| 1714 objArrayHandle names_ah(THREAD, ta); | |
| 1715 // Make sure we have a String array | |
| 1716 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
| 1142 | 1717 if (element_klass != SystemDictionary::String_klass()) { |
| 0 | 1718 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| 1719 "Array element type is not String class", 0); | |
| 1720 } | |
| 1721 | |
| 1722 int names_length = names_ah->length(); | |
| 1723 int num_entries = 0; | |
| 1724 for (int i = 0; i < names_length && i < count; i++) { | |
| 1725 oop s = names_ah->obj_at(i); | |
| 1726 if (s == NULL) { | |
| 1727 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1728 } | |
| 1729 | |
| 1730 Handle sh(THREAD, s); | |
| 1731 char* str = java_lang_String::as_utf8_string(s); | |
| 1732 Flag* flag = Flag::find_flag(str, strlen(str)); | |
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1733 if (flag != NULL && |
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1734 add_global_entry(env, sh, &globals[i], flag, THREAD)) { |
| 0 | 1735 num_entries++; |
| 1736 } else { | |
| 1737 globals[i].name = NULL; | |
| 1738 } | |
| 1739 } | |
| 1740 return num_entries; | |
| 1741 } else { | |
| 1742 // return all globals if names == NULL | |
| 1743 | |
| 1744 // last flag entry is always NULL, so subtract 1 | |
| 1745 int nFlags = (int) Flag::numFlags - 1; | |
| 1746 Handle null_h; | |
| 1747 int num_entries = 0; | |
| 1748 for (int i = 0; i < nFlags && num_entries < count; i++) { | |
| 1749 Flag* flag = &Flag::flags[i]; | |
| 350 | 1750 // Exclude the locked (diagnostic, experimental) flags |
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1751 if ((flag->is_unlocked() || flag->is_unlocker()) && |
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1752 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD)) { |
| 0 | 1753 num_entries++; |
| 1754 } | |
| 1755 } | |
| 1756 return num_entries; | |
| 1757 } | |
| 1758 JVM_END | |
| 1759 | |
| 1760 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) | |
| 1761 ResourceMark rm(THREAD); | |
| 1762 | |
| 1763 oop fn = JNIHandles::resolve_external_guard(flag_name); | |
| 1764 if (fn == NULL) { | |
| 1765 THROW_MSG(vmSymbols::java_lang_NullPointerException(), | |
| 1766 "The flag name cannot be null."); | |
| 1767 } | |
| 1768 char* name = java_lang_String::as_utf8_string(fn); | |
| 1769 Flag* flag = Flag::find_flag(name, strlen(name)); | |
| 1770 if (flag == NULL) { | |
| 1771 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1772 "Flag does not exist."); | |
| 1773 } | |
| 1774 if (!flag->is_writeable()) { | |
| 1775 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1776 "This flag is not writeable."); | |
| 1777 } | |
| 1778 | |
| 1779 bool succeed; | |
| 1780 if (flag->is_bool()) { | |
| 1781 bool bvalue = (new_value.z == JNI_TRUE ? true : false); | |
| 1782 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); | |
| 1783 } else if (flag->is_intx()) { | |
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1784 intx ivalue = (intx)new_value.j; |
| 0 | 1785 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); |
| 1786 } else if (flag->is_uintx()) { | |
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1787 uintx uvalue = (uintx)new_value.j; |
| 0 | 1788 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); |
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1789 } else if (flag->is_uint64_t()) { |
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1790 uint64_t uvalue = (uint64_t)new_value.j; |
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1791 succeed = CommandLineFlags::uint64_tAtPut(name, &uvalue, MANAGEMENT); |
| 0 | 1792 } else if (flag->is_ccstr()) { |
| 1793 oop str = JNIHandles::resolve_external_guard(new_value.l); | |
| 1794 if (str == NULL) { | |
| 1795 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1796 } | |
| 1797 ccstr svalue = java_lang_String::as_utf8_string(str); | |
| 1798 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); | |
| 1799 } | |
| 1800 assert(succeed, "Setting flag should succeed"); | |
| 1801 JVM_END | |
| 1802 | |
| 1803 class ThreadTimesClosure: public ThreadClosure { | |
| 1804 private: | |
| 1805 objArrayOop _names; | |
| 1806 typeArrayOop _times; | |
| 1807 int _names_len; | |
| 1808 int _times_len; | |
| 1809 int _count; | |
| 1810 | |
| 1811 public: | |
| 1812 ThreadTimesClosure(objArrayOop names, typeArrayOop times); | |
| 1813 virtual void do_thread(Thread* thread); | |
| 1814 int count() { return _count; } | |
| 1815 }; | |
| 1816 | |
| 1817 ThreadTimesClosure::ThreadTimesClosure(objArrayOop names, | |
| 1818 typeArrayOop times) { | |
| 1819 assert(names != NULL, "names was NULL"); | |
| 1820 assert(times != NULL, "times was NULL"); | |
| 1821 _names = names; | |
| 1822 _names_len = names->length(); | |
| 1823 _times = times; | |
| 1824 _times_len = times->length(); | |
| 1825 _count = 0; | |
| 1826 } | |
| 1827 | |
| 1828 void ThreadTimesClosure::do_thread(Thread* thread) { | |
| 1829 Handle s; | |
| 1830 assert(thread != NULL, "thread was NULL"); | |
| 1831 | |
| 1832 // exclude externally visible JavaThreads | |
| 1833 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { | |
| 1834 return; | |
| 1835 } | |
| 1836 | |
| 1837 if (_count >= _names_len || _count >= _times_len) { | |
| 1838 // skip if the result array is not big enough | |
| 1839 return; | |
| 1840 } | |
| 1841 | |
| 1842 EXCEPTION_MARK; | |
| 1843 | |
| 1844 assert(thread->name() != NULL, "All threads should have a name"); | |
| 1845 s = java_lang_String::create_from_str(thread->name(), CHECK); | |
| 1846 _names->obj_at_put(_count, s()); | |
| 1847 | |
| 1848 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? | |
| 1849 os::thread_cpu_time(thread) : -1); | |
| 1850 _count++; | |
| 1851 } | |
| 1852 | |
| 1853 // Fills names with VM internal thread names and times with the corresponding | |
| 1854 // CPU times. If names or times is NULL, a NullPointerException is thrown. | |
| 1855 // If the element type of names is not String, an IllegalArgumentException is | |
| 1856 // thrown. | |
| 1857 // If an array is not large enough to hold all the entries, only the entries | |
| 1858 // that fit will be returned. Return value is the number of VM internal | |
| 1859 // threads entries. | |
| 1860 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, | |
| 1861 jobjectArray names, | |
| 1862 jlongArray times)) | |
| 1863 if (names == NULL || times == NULL) { | |
| 1864 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1865 } | |
| 1866 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); | |
| 1867 objArrayHandle names_ah(THREAD, na); | |
| 1868 | |
| 1869 // Make sure we have a String array | |
| 1870 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); | |
| 1142 | 1871 if (element_klass != SystemDictionary::String_klass()) { |
| 0 | 1872 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
| 1873 "Array element type is not String class", 0); | |
| 1874 } | |
| 1875 | |
| 1876 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); | |
| 1877 typeArrayHandle times_ah(THREAD, ta); | |
| 1878 | |
| 1879 ThreadTimesClosure ttc(names_ah(), times_ah()); | |
| 1880 { | |
| 1881 MutexLockerEx ml(Threads_lock); | |
| 1882 Threads::threads_do(&ttc); | |
| 1883 } | |
| 1884 | |
| 1885 return ttc.count(); | |
| 1886 JVM_END | |
| 1887 | |
| 1888 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { | |
| 1889 ResourceMark rm(THREAD); | |
| 1890 | |
| 1891 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); | |
| 1892 VMThread::execute(&op); | |
| 1893 | |
| 1894 DeadlockCycle* deadlocks = op.result(); | |
| 1895 if (deadlocks == NULL) { | |
| 1896 // no deadlock found and return | |
| 1897 return Handle(); | |
| 1898 } | |
| 1899 | |
| 1900 int num_threads = 0; | |
| 1901 DeadlockCycle* cycle; | |
| 1902 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 1903 num_threads += cycle->num_threads(); | |
| 1904 } | |
| 1905 | |
| 1142 | 1906 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NH); |
| 0 | 1907 objArrayHandle threads_ah(THREAD, r); |
| 1908 | |
| 1909 int index = 0; | |
| 1910 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 1911 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); | |
| 1912 int len = deadlock_threads->length(); | |
| 1913 for (int i = 0; i < len; i++) { | |
| 1914 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); | |
| 1915 index++; | |
| 1916 } | |
| 1917 } | |
| 1918 return threads_ah; | |
| 1919 } | |
| 1920 | |
| 1921 // Finds cycles of threads that are deadlocked involved in object monitors | |
| 1922 // and JSR-166 synchronizers. | |
| 1923 // Returns an array of Thread objects which are in deadlock, if any. | |
| 1924 // Otherwise, returns NULL. | |
| 1925 // | |
| 1926 // Input parameter: | |
| 1927 // object_monitors_only - if true, only check object monitors | |
| 1928 // | |
| 1929 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) | |
| 1930 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); | |
| 1931 return (jobjectArray) JNIHandles::make_local(env, result()); | |
| 1932 JVM_END | |
| 1933 | |
| 1934 // Finds cycles of threads that are deadlocked on monitor locks | |
| 1935 // Returns an array of Thread objects which are in deadlock, if any. | |
| 1936 // Otherwise, returns NULL. | |
| 1937 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) | |
| 1938 Handle result = find_deadlocks(true, CHECK_0); | |
| 1939 return (jobjectArray) JNIHandles::make_local(env, result()); | |
| 1940 JVM_END | |
| 1941 | |
| 1942 // Gets the information about GC extension attributes including | |
| 1943 // the name of the attribute, its type, and a short description. | |
| 1944 // | |
| 1945 // Input parameters: | |
| 1946 // mgr - GC memory manager | |
| 1947 // info - caller allocated array of jmmExtAttributeInfo | |
| 1948 // count - number of elements of the info array | |
| 1949 // | |
| 1950 // Returns the number of GC extension attributes filled in the info array; or | |
| 1951 // -1 if info is not big enough | |
| 1952 // | |
| 1953 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) | |
| 1954 // All GC memory managers have 1 attribute (number of GC threads) | |
| 1955 if (count == 0) { | |
| 1956 return 0; | |
| 1957 } | |
| 1958 | |
| 1959 if (info == NULL) { | |
| 1960 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1961 } | |
| 1962 | |
| 1963 info[0].name = "GcThreadCount"; | |
| 1964 info[0].type = 'I'; | |
| 1965 info[0].description = "Number of GC threads"; | |
| 1966 return 1; | |
| 1967 JVM_END | |
| 1968 | |
| 1969 // verify the given array is an array of java/lang/management/MemoryUsage objects | |
| 1970 // of a given length and return the objArrayOop | |
| 1971 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { | |
| 1972 if (array == NULL) { | |
| 1973 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
| 1974 } | |
| 1975 | |
| 1976 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); | |
| 1977 objArrayHandle array_h(THREAD, oa); | |
| 1978 | |
| 1979 // array must be of the given length | |
| 1980 if (length != array_h->length()) { | |
| 1981 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1982 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); | |
| 1983 } | |
| 1984 | |
| 1985 // check if the element of array is of type MemoryUsage class | |
| 1986 klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); | |
| 1987 klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass(); | |
| 1988 if (element_klass != usage_klass) { | |
| 1989 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), | |
| 1990 "The element type is not MemoryUsage class", 0); | |
| 1991 } | |
| 1992 | |
| 1993 return array_h(); | |
| 1994 } | |
| 1995 | |
| 1996 // Gets the statistics of the last GC of a given GC memory manager. | |
| 1997 // Input parameters: | |
| 1998 // obj - GarbageCollectorMXBean object | |
| 1999 // gc_stat - caller allocated jmmGCStat where: | |
| 2000 // a. before_gc_usage - array of MemoryUsage objects | |
| 2001 // b. after_gc_usage - array of MemoryUsage objects | |
| 2002 // c. gc_ext_attributes_values_size is set to the | |
| 2003 // gc_ext_attribute_values array allocated | |
| 2004 // d. gc_ext_attribute_values is a caller allocated array of jvalue. | |
| 2005 // | |
| 2006 // On return, | |
| 2007 // gc_index == 0 indicates no GC statistics available | |
| 2008 // | |
| 2009 // before_gc_usage and after_gc_usage - filled with per memory pool | |
| 2010 // before and after GC usage in the same order as the memory pools | |
| 2011 // returned by GetMemoryPools for a given GC memory manager. | |
| 2012 // num_gc_ext_attributes indicates the number of elements in | |
| 2013 // the gc_ext_attribute_values array is filled; or | |
| 2014 // -1 if the gc_ext_attributes_values array is not big enough | |
| 2015 // | |
| 2016 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) | |
| 2017 ResourceMark rm(THREAD); | |
| 2018 | |
| 2019 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { | |
| 2020 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 2021 } | |
| 2022 | |
| 2023 // Get the GCMemoryManager | |
| 2024 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); | |
| 2025 | |
| 2026 // Make a copy of the last GC statistics | |
| 2027 // GC may occur while constructing the last GC information | |
| 2028 int num_pools = MemoryService::num_memory_pools(); | |
| 2029 GCStatInfo* stat = new GCStatInfo(num_pools); | |
|
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2030 if (mgr->get_last_gc_stat(stat) == 0) { |
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2031 gc_stat->gc_index = 0; |
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2032 return; |
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2033 } |
| 0 | 2034 |
| 2035 gc_stat->gc_index = stat->gc_index(); | |
| 2036 gc_stat->start_time = Management::ticks_to_ms(stat->start_time()); | |
| 2037 gc_stat->end_time = Management::ticks_to_ms(stat->end_time()); | |
| 2038 | |
| 2039 // Current implementation does not have GC extension attributes | |
| 2040 gc_stat->num_gc_ext_attributes = 0; | |
| 2041 | |
| 2042 // Fill the arrays of MemoryUsage objects with before and after GC | |
| 2043 // per pool memory usage | |
| 2044 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, | |
| 2045 num_pools, | |
| 2046 CHECK); | |
| 2047 objArrayHandle usage_before_gc_ah(THREAD, bu); | |
| 2048 | |
| 2049 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, | |
| 2050 num_pools, | |
| 2051 CHECK); | |
| 2052 objArrayHandle usage_after_gc_ah(THREAD, au); | |
| 2053 | |
| 2054 for (int i = 0; i < num_pools; i++) { | |
| 2055 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK); | |
| 2056 Handle after_usage; | |
| 2057 | |
| 2058 MemoryUsage u = stat->after_gc_usage_for_pool(i); | |
| 2059 if (u.max_size() == 0 && u.used() > 0) { | |
| 2060 // If max size == 0, this pool is a survivor space. | |
| 2061 // Set max size = -1 since the pools will be swapped after GC. | |
| 2062 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); | |
| 2063 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); | |
| 2064 } else { | |
| 2065 after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK); | |
| 2066 } | |
| 2067 usage_before_gc_ah->obj_at_put(i, before_usage()); | |
| 2068 usage_after_gc_ah->obj_at_put(i, after_usage()); | |
| 2069 } | |
| 2070 | |
| 2071 if (gc_stat->gc_ext_attribute_values_size > 0) { | |
| 2072 // Current implementation only has 1 attribute (number of GC threads) | |
| 2073 // The type is 'I' | |
| 2074 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); | |
| 2075 } | |
| 2076 JVM_END | |
| 2077 | |
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2078 JVM_ENTRY(void, jmm_SetGCNotificationEnabled(JNIEnv *env, jobject obj, jboolean enabled)) |
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2079 ResourceMark rm(THREAD); |
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2080 // Get the GCMemoryManager |
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2081 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); |
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2082 mgr->set_notification_enabled(enabled?true:false); |
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2083 JVM_END |
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2084 |
| 0 | 2085 // Dump heap - Returns 0 if succeeds. |
| 2086 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) | |
| 2087 #ifndef SERVICES_KERNEL | |
| 2088 ResourceMark rm(THREAD); | |
| 2089 oop on = JNIHandles::resolve_external_guard(outputfile); | |
| 2090 if (on == NULL) { | |
| 2091 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
| 2092 "Output file name cannot be null.", -1); | |
| 2093 } | |
| 2094 char* name = java_lang_String::as_utf8_string(on); | |
| 2095 if (name == NULL) { | |
| 2096 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), | |
| 2097 "Output file name cannot be null.", -1); | |
| 2098 } | |
| 2099 HeapDumper dumper(live ? true : false); | |
| 2100 if (dumper.dump(name) != 0) { | |
| 2101 const char* errmsg = dumper.error_as_C_string(); | |
| 2102 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); | |
| 2103 } | |
| 2104 return 0; | |
| 2105 #else // SERVICES_KERNEL | |
| 2106 return -1; | |
| 2107 #endif // SERVICES_KERNEL | |
| 2108 JVM_END | |
| 2109 | |
| 2110 jlong Management::ticks_to_ms(jlong ticks) { | |
| 2111 assert(os::elapsed_frequency() > 0, "Must be non-zero"); | |
| 2112 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) | |
| 2113 * (double)1000.0); | |
| 2114 } | |
| 2115 | |
| 2116 const struct jmmInterface_1_ jmm_interface = { | |
| 2117 NULL, | |
| 2118 NULL, | |
| 2119 jmm_GetVersion, | |
| 2120 jmm_GetOptionalSupport, | |
| 2121 jmm_GetInputArguments, | |
| 2122 jmm_GetThreadInfo, | |
| 2123 jmm_GetInputArgumentArray, | |
| 2124 jmm_GetMemoryPools, | |
| 2125 jmm_GetMemoryManagers, | |
| 2126 jmm_GetMemoryPoolUsage, | |
| 2127 jmm_GetPeakMemoryPoolUsage, | |
|
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2128 jmm_GetThreadAllocatedMemory, |
| 0 | 2129 jmm_GetMemoryUsage, |
| 2130 jmm_GetLongAttribute, | |
| 2131 jmm_GetBoolAttribute, | |
| 2132 jmm_SetBoolAttribute, | |
| 2133 jmm_GetLongAttributes, | |
| 2134 jmm_FindMonitorDeadlockedThreads, | |
| 2135 jmm_GetThreadCpuTime, | |
| 2136 jmm_GetVMGlobalNames, | |
| 2137 jmm_GetVMGlobals, | |
| 2138 jmm_GetInternalThreadTimes, | |
| 2139 jmm_ResetStatistic, | |
| 2140 jmm_SetPoolSensor, | |
| 2141 jmm_SetPoolThreshold, | |
| 2142 jmm_GetPoolCollectionUsage, | |
| 2143 jmm_GetGCExtAttributeInfo, | |
| 2144 jmm_GetLastGCStat, | |
| 2145 jmm_GetThreadCpuTimeWithKind, | |
|
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2146 jmm_GetThreadCpuTimesWithKind, |
| 0 | 2147 jmm_DumpHeap0, |
| 2148 jmm_FindDeadlockedThreads, | |
| 2149 jmm_SetVMGlobal, | |
| 2150 NULL, | |
|
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2151 jmm_DumpThreads, |
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2152 jmm_SetGCNotificationEnabled |
| 0 | 2153 }; |
| 2154 | |
| 2155 void* Management::get_jmm_interface(int version) { | |
| 2156 if (version == JMM_VERSION_1_0) { | |
| 2157 return (void*) &jmm_interface; | |
| 2158 } | |
| 2159 return NULL; | |
| 2160 } |