Tue, 29 Apr 2014 15:17:27 +0200
8042195: Introduce umbrella header orderAccess.inline.hpp.
Reviewed-by: dholmes, kvn, stefank, twisti
duke@435 | 1 | /* |
drchase@6680 | 2 | * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 27 | #include "memory/allocation.hpp" |
stefank@2314 | 28 | #include "memory/heapInspection.hpp" |
stefank@2314 | 29 | #include "memory/oopFactory.hpp" |
stefank@2314 | 30 | #include "oops/instanceKlass.hpp" |
stefank@2314 | 31 | #include "oops/oop.inline.hpp" |
stefank@2314 | 32 | #include "runtime/handles.inline.hpp" |
stefank@2314 | 33 | #include "runtime/init.hpp" |
stefank@2314 | 34 | #include "runtime/thread.hpp" |
stefank@2314 | 35 | #include "runtime/vframe.hpp" |
goetz@6911 | 36 | #include "runtime/thread.inline.hpp" |
stefank@2314 | 37 | #include "runtime/vmThread.hpp" |
stefank@2314 | 38 | #include "runtime/vm_operations.hpp" |
stefank@2314 | 39 | #include "services/threadService.hpp" |
duke@435 | 40 | |
drchase@6680 | 41 | PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
drchase@6680 | 42 | |
duke@435 | 43 | // TODO: we need to define a naming convention for perf counters |
duke@435 | 44 | // to distinguish counters for: |
duke@435 | 45 | // - standard JSR174 use |
duke@435 | 46 | // - Hotspot extension (public and committed) |
duke@435 | 47 | // - Hotspot extension (private/internal and uncommitted) |
duke@435 | 48 | |
duke@435 | 49 | // Default is disabled. |
duke@435 | 50 | bool ThreadService::_thread_monitoring_contention_enabled = false; |
duke@435 | 51 | bool ThreadService::_thread_cpu_time_enabled = false; |
phh@2423 | 52 | bool ThreadService::_thread_allocated_memory_enabled = false; |
duke@435 | 53 | |
duke@435 | 54 | PerfCounter* ThreadService::_total_threads_count = NULL; |
duke@435 | 55 | PerfVariable* ThreadService::_live_threads_count = NULL; |
duke@435 | 56 | PerfVariable* ThreadService::_peak_threads_count = NULL; |
duke@435 | 57 | PerfVariable* ThreadService::_daemon_threads_count = NULL; |
duke@435 | 58 | volatile int ThreadService::_exiting_threads_count = 0; |
duke@435 | 59 | volatile int ThreadService::_exiting_daemon_threads_count = 0; |
duke@435 | 60 | |
duke@435 | 61 | ThreadDumpResult* ThreadService::_threaddump_list = NULL; |
duke@435 | 62 | |
duke@435 | 63 | static const int INITIAL_ARRAY_SIZE = 10; |
duke@435 | 64 | |
duke@435 | 65 | void ThreadService::init() { |
duke@435 | 66 | EXCEPTION_MARK; |
duke@435 | 67 | |
duke@435 | 68 | // These counters are for java.lang.management API support. |
duke@435 | 69 | // They are created even if -XX:-UsePerfData is set and in |
duke@435 | 70 | // that case, they will be allocated on C heap. |
duke@435 | 71 | |
duke@435 | 72 | _total_threads_count = |
duke@435 | 73 | PerfDataManager::create_counter(JAVA_THREADS, "started", |
duke@435 | 74 | PerfData::U_Events, CHECK); |
duke@435 | 75 | |
duke@435 | 76 | _live_threads_count = |
duke@435 | 77 | PerfDataManager::create_variable(JAVA_THREADS, "live", |
duke@435 | 78 | PerfData::U_None, CHECK); |
duke@435 | 79 | |
duke@435 | 80 | _peak_threads_count = |
duke@435 | 81 | PerfDataManager::create_variable(JAVA_THREADS, "livePeak", |
duke@435 | 82 | PerfData::U_None, CHECK); |
duke@435 | 83 | |
duke@435 | 84 | _daemon_threads_count = |
duke@435 | 85 | PerfDataManager::create_variable(JAVA_THREADS, "daemon", |
duke@435 | 86 | PerfData::U_None, CHECK); |
duke@435 | 87 | |
duke@435 | 88 | if (os::is_thread_cpu_time_supported()) { |
duke@435 | 89 | _thread_cpu_time_enabled = true; |
duke@435 | 90 | } |
phh@2423 | 91 | |
phh@2423 | 92 | _thread_allocated_memory_enabled = true; // Always on, so enable it |
duke@435 | 93 | } |
duke@435 | 94 | |
duke@435 | 95 | void ThreadService::reset_peak_thread_count() { |
duke@435 | 96 | // Acquire the lock to update the peak thread count |
duke@435 | 97 | // to synchronize with thread addition and removal. |
duke@435 | 98 | MutexLockerEx mu(Threads_lock); |
duke@435 | 99 | _peak_threads_count->set_value(get_live_thread_count()); |
duke@435 | 100 | } |
duke@435 | 101 | |
duke@435 | 102 | void ThreadService::add_thread(JavaThread* thread, bool daemon) { |
duke@435 | 103 | // Do not count VM internal or JVMTI agent threads |
duke@435 | 104 | if (thread->is_hidden_from_external_view() || |
duke@435 | 105 | thread->is_jvmti_agent_thread()) { |
duke@435 | 106 | return; |
duke@435 | 107 | } |
duke@435 | 108 | |
duke@435 | 109 | _total_threads_count->inc(); |
duke@435 | 110 | _live_threads_count->inc(); |
duke@435 | 111 | |
duke@435 | 112 | if (_live_threads_count->get_value() > _peak_threads_count->get_value()) { |
duke@435 | 113 | _peak_threads_count->set_value(_live_threads_count->get_value()); |
duke@435 | 114 | } |
duke@435 | 115 | |
duke@435 | 116 | if (daemon) { |
duke@435 | 117 | _daemon_threads_count->inc(); |
duke@435 | 118 | } |
duke@435 | 119 | } |
duke@435 | 120 | |
duke@435 | 121 | void ThreadService::remove_thread(JavaThread* thread, bool daemon) { |
duke@435 | 122 | Atomic::dec((jint*) &_exiting_threads_count); |
duke@435 | 123 | |
duke@435 | 124 | if (thread->is_hidden_from_external_view() || |
duke@435 | 125 | thread->is_jvmti_agent_thread()) { |
duke@435 | 126 | return; |
duke@435 | 127 | } |
duke@435 | 128 | |
duke@435 | 129 | _live_threads_count->set_value(_live_threads_count->get_value() - 1); |
duke@435 | 130 | |
duke@435 | 131 | if (daemon) { |
duke@435 | 132 | _daemon_threads_count->set_value(_daemon_threads_count->get_value() - 1); |
duke@435 | 133 | Atomic::dec((jint*) &_exiting_daemon_threads_count); |
duke@435 | 134 | } |
duke@435 | 135 | } |
duke@435 | 136 | |
duke@435 | 137 | void ThreadService::current_thread_exiting(JavaThread* jt) { |
duke@435 | 138 | assert(jt == JavaThread::current(), "Called by current thread"); |
duke@435 | 139 | Atomic::inc((jint*) &_exiting_threads_count); |
duke@435 | 140 | |
duke@435 | 141 | oop threadObj = jt->threadObj(); |
duke@435 | 142 | if (threadObj != NULL && java_lang_Thread::is_daemon(threadObj)) { |
duke@435 | 143 | Atomic::inc((jint*) &_exiting_daemon_threads_count); |
duke@435 | 144 | } |
duke@435 | 145 | } |
duke@435 | 146 | |
duke@435 | 147 | // FIXME: JVMTI should call this function |
duke@435 | 148 | Handle ThreadService::get_current_contended_monitor(JavaThread* thread) { |
duke@435 | 149 | assert(thread != NULL, "should be non-NULL"); |
duke@435 | 150 | assert(Threads_lock->owned_by_self(), "must grab Threads_lock or be at safepoint"); |
duke@435 | 151 | |
duke@435 | 152 | ObjectMonitor *wait_obj = thread->current_waiting_monitor(); |
duke@435 | 153 | |
duke@435 | 154 | oop obj = NULL; |
duke@435 | 155 | if (wait_obj != NULL) { |
duke@435 | 156 | // thread is doing an Object.wait() call |
duke@435 | 157 | obj = (oop) wait_obj->object(); |
duke@435 | 158 | assert(obj != NULL, "Object.wait() should have an object"); |
duke@435 | 159 | } else { |
duke@435 | 160 | ObjectMonitor *enter_obj = thread->current_pending_monitor(); |
duke@435 | 161 | if (enter_obj != NULL) { |
duke@435 | 162 | // thread is trying to enter() or raw_enter() an ObjectMonitor. |
duke@435 | 163 | obj = (oop) enter_obj->object(); |
duke@435 | 164 | } |
duke@435 | 165 | // If obj == NULL, then ObjectMonitor is raw which doesn't count. |
duke@435 | 166 | } |
duke@435 | 167 | |
duke@435 | 168 | Handle h(obj); |
duke@435 | 169 | return h; |
duke@435 | 170 | } |
duke@435 | 171 | |
duke@435 | 172 | bool ThreadService::set_thread_monitoring_contention(bool flag) { |
duke@435 | 173 | MutexLocker m(Management_lock); |
duke@435 | 174 | |
duke@435 | 175 | bool prev = _thread_monitoring_contention_enabled; |
duke@435 | 176 | _thread_monitoring_contention_enabled = flag; |
duke@435 | 177 | |
duke@435 | 178 | return prev; |
duke@435 | 179 | } |
duke@435 | 180 | |
duke@435 | 181 | bool ThreadService::set_thread_cpu_time_enabled(bool flag) { |
duke@435 | 182 | MutexLocker m(Management_lock); |
duke@435 | 183 | |
duke@435 | 184 | bool prev = _thread_cpu_time_enabled; |
duke@435 | 185 | _thread_cpu_time_enabled = flag; |
duke@435 | 186 | |
duke@435 | 187 | return prev; |
duke@435 | 188 | } |
duke@435 | 189 | |
phh@2423 | 190 | bool ThreadService::set_thread_allocated_memory_enabled(bool flag) { |
phh@2423 | 191 | MutexLocker m(Management_lock); |
phh@2423 | 192 | |
phh@2423 | 193 | bool prev = _thread_allocated_memory_enabled; |
phh@2423 | 194 | _thread_allocated_memory_enabled = flag; |
phh@2423 | 195 | |
phh@2423 | 196 | return prev; |
phh@2423 | 197 | } |
phh@2423 | 198 | |
duke@435 | 199 | // GC support |
duke@435 | 200 | void ThreadService::oops_do(OopClosure* f) { |
duke@435 | 201 | for (ThreadDumpResult* dump = _threaddump_list; dump != NULL; dump = dump->next()) { |
duke@435 | 202 | dump->oops_do(f); |
duke@435 | 203 | } |
duke@435 | 204 | } |
duke@435 | 205 | |
sla@6122 | 206 | void ThreadService::metadata_do(void f(Metadata*)) { |
sla@6122 | 207 | for (ThreadDumpResult* dump = _threaddump_list; dump != NULL; dump = dump->next()) { |
sla@6122 | 208 | dump->metadata_do(f); |
sla@6122 | 209 | } |
sla@6122 | 210 | } |
sla@6122 | 211 | |
duke@435 | 212 | void ThreadService::add_thread_dump(ThreadDumpResult* dump) { |
duke@435 | 213 | MutexLocker ml(Management_lock); |
duke@435 | 214 | if (_threaddump_list == NULL) { |
duke@435 | 215 | _threaddump_list = dump; |
duke@435 | 216 | } else { |
duke@435 | 217 | dump->set_next(_threaddump_list); |
duke@435 | 218 | _threaddump_list = dump; |
duke@435 | 219 | } |
duke@435 | 220 | } |
duke@435 | 221 | |
duke@435 | 222 | void ThreadService::remove_thread_dump(ThreadDumpResult* dump) { |
duke@435 | 223 | MutexLocker ml(Management_lock); |
duke@435 | 224 | |
duke@435 | 225 | ThreadDumpResult* prev = NULL; |
duke@435 | 226 | bool found = false; |
duke@435 | 227 | for (ThreadDumpResult* d = _threaddump_list; d != NULL; prev = d, d = d->next()) { |
duke@435 | 228 | if (d == dump) { |
duke@435 | 229 | if (prev == NULL) { |
duke@435 | 230 | _threaddump_list = dump->next(); |
duke@435 | 231 | } else { |
duke@435 | 232 | prev->set_next(dump->next()); |
duke@435 | 233 | } |
duke@435 | 234 | found = true; |
duke@435 | 235 | break; |
duke@435 | 236 | } |
duke@435 | 237 | } |
duke@435 | 238 | assert(found, "The threaddump result to be removed must exist."); |
duke@435 | 239 | } |
duke@435 | 240 | |
duke@435 | 241 | // Dump stack trace of threads specified in the given threads array. |
duke@435 | 242 | // Returns StackTraceElement[][] each element is the stack trace of a thread in |
duke@435 | 243 | // the corresponding entry in the given threads array |
duke@435 | 244 | Handle ThreadService::dump_stack_traces(GrowableArray<instanceHandle>* threads, |
duke@435 | 245 | int num_threads, |
duke@435 | 246 | TRAPS) { |
duke@435 | 247 | assert(num_threads > 0, "just checking"); |
duke@435 | 248 | |
duke@435 | 249 | ThreadDumpResult dump_result; |
duke@435 | 250 | VM_ThreadDump op(&dump_result, |
duke@435 | 251 | threads, |
duke@435 | 252 | num_threads, |
duke@435 | 253 | -1, /* entire stack */ |
duke@435 | 254 | false, /* with locked monitors */ |
duke@435 | 255 | false /* with locked synchronizers */); |
duke@435 | 256 | VMThread::execute(&op); |
duke@435 | 257 | |
duke@435 | 258 | // Allocate the resulting StackTraceElement[][] object |
duke@435 | 259 | |
duke@435 | 260 | ResourceMark rm(THREAD); |
coleenp@4037 | 261 | Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_StackTraceElement_array(), true, CHECK_NH); |
coleenp@4142 | 262 | ObjArrayKlass* ik = ObjArrayKlass::cast(k); |
coleenp@4037 | 263 | objArrayOop r = oopFactory::new_objArray(ik, num_threads, CHECK_NH); |
duke@435 | 264 | objArrayHandle result_obj(THREAD, r); |
duke@435 | 265 | |
duke@435 | 266 | int num_snapshots = dump_result.num_snapshots(); |
duke@435 | 267 | assert(num_snapshots == num_threads, "Must have num_threads thread snapshots"); |
duke@435 | 268 | int i = 0; |
duke@435 | 269 | for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; i++, ts = ts->next()) { |
duke@435 | 270 | ThreadStackTrace* stacktrace = ts->get_stack_trace(); |
duke@435 | 271 | if (stacktrace == NULL) { |
duke@435 | 272 | // No stack trace |
duke@435 | 273 | result_obj->obj_at_put(i, NULL); |
duke@435 | 274 | } else { |
duke@435 | 275 | // Construct an array of java/lang/StackTraceElement object |
duke@435 | 276 | Handle backtrace_h = stacktrace->allocate_fill_stack_trace_element_array(CHECK_NH); |
duke@435 | 277 | result_obj->obj_at_put(i, backtrace_h()); |
duke@435 | 278 | } |
duke@435 | 279 | } |
duke@435 | 280 | |
duke@435 | 281 | return result_obj; |
duke@435 | 282 | } |
duke@435 | 283 | |
duke@435 | 284 | void ThreadService::reset_contention_count_stat(JavaThread* thread) { |
duke@435 | 285 | ThreadStatistics* stat = thread->get_thread_stat(); |
duke@435 | 286 | if (stat != NULL) { |
duke@435 | 287 | stat->reset_count_stat(); |
duke@435 | 288 | } |
duke@435 | 289 | } |
duke@435 | 290 | |
duke@435 | 291 | void ThreadService::reset_contention_time_stat(JavaThread* thread) { |
duke@435 | 292 | ThreadStatistics* stat = thread->get_thread_stat(); |
duke@435 | 293 | if (stat != NULL) { |
duke@435 | 294 | stat->reset_time_stat(); |
duke@435 | 295 | } |
duke@435 | 296 | } |
duke@435 | 297 | |
duke@435 | 298 | // Find deadlocks involving object monitors and concurrent locks if concurrent_locks is true |
duke@435 | 299 | DeadlockCycle* ThreadService::find_deadlocks_at_safepoint(bool concurrent_locks) { |
duke@435 | 300 | // This code was modified from the original Threads::find_deadlocks code. |
duke@435 | 301 | int globalDfn = 0, thisDfn; |
duke@435 | 302 | ObjectMonitor* waitingToLockMonitor = NULL; |
duke@435 | 303 | oop waitingToLockBlocker = NULL; |
duke@435 | 304 | bool blocked_on_monitor = false; |
duke@435 | 305 | JavaThread *currentThread, *previousThread; |
duke@435 | 306 | int num_deadlocks = 0; |
duke@435 | 307 | |
duke@435 | 308 | for (JavaThread* p = Threads::first(); p != NULL; p = p->next()) { |
duke@435 | 309 | // Initialize the depth-first-number |
duke@435 | 310 | p->set_depth_first_number(-1); |
duke@435 | 311 | } |
duke@435 | 312 | |
duke@435 | 313 | DeadlockCycle* deadlocks = NULL; |
duke@435 | 314 | DeadlockCycle* last = NULL; |
duke@435 | 315 | DeadlockCycle* cycle = new DeadlockCycle(); |
duke@435 | 316 | for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) { |
duke@435 | 317 | if (jt->depth_first_number() >= 0) { |
duke@435 | 318 | // this thread was already visited |
duke@435 | 319 | continue; |
duke@435 | 320 | } |
duke@435 | 321 | |
duke@435 | 322 | thisDfn = globalDfn; |
duke@435 | 323 | jt->set_depth_first_number(globalDfn++); |
duke@435 | 324 | previousThread = jt; |
duke@435 | 325 | currentThread = jt; |
duke@435 | 326 | |
duke@435 | 327 | cycle->reset(); |
duke@435 | 328 | |
duke@435 | 329 | // When there is a deadlock, all the monitors involved in the dependency |
duke@435 | 330 | // cycle must be contended and heavyweight. So we only care about the |
duke@435 | 331 | // heavyweight monitor a thread is waiting to lock. |
duke@435 | 332 | waitingToLockMonitor = (ObjectMonitor*)jt->current_pending_monitor(); |
duke@435 | 333 | if (concurrent_locks) { |
duke@435 | 334 | waitingToLockBlocker = jt->current_park_blocker(); |
duke@435 | 335 | } |
duke@435 | 336 | while (waitingToLockMonitor != NULL || waitingToLockBlocker != NULL) { |
duke@435 | 337 | cycle->add_thread(currentThread); |
duke@435 | 338 | if (waitingToLockMonitor != NULL) { |
sla@5271 | 339 | address currentOwner = (address)waitingToLockMonitor->owner(); |
sla@5271 | 340 | if (currentOwner != NULL) { |
sla@5271 | 341 | currentThread = Threads::owning_thread_from_monitor_owner( |
sla@5271 | 342 | currentOwner, |
sla@5271 | 343 | false /* no locking needed */); |
sla@5271 | 344 | if (currentThread == NULL) { |
sla@5271 | 345 | // This function is called at a safepoint so the JavaThread |
sla@5271 | 346 | // that owns waitingToLockMonitor should be findable, but |
sla@5271 | 347 | // if it is not findable, then the previous currentThread is |
sla@5271 | 348 | // blocked permanently. We record this as a deadlock. |
sla@5271 | 349 | num_deadlocks++; |
dcubed@4673 | 350 | |
sla@5271 | 351 | cycle->set_deadlock(true); |
dcubed@4673 | 352 | |
sla@5271 | 353 | // add this cycle to the deadlocks list |
sla@5271 | 354 | if (deadlocks == NULL) { |
sla@5271 | 355 | deadlocks = cycle; |
sla@5271 | 356 | } else { |
sla@5271 | 357 | last->set_next(cycle); |
sla@5271 | 358 | } |
sla@5271 | 359 | last = cycle; |
sla@5271 | 360 | cycle = new DeadlockCycle(); |
sla@5271 | 361 | break; |
dcubed@4673 | 362 | } |
dcubed@4673 | 363 | } |
duke@435 | 364 | } else { |
duke@435 | 365 | if (concurrent_locks) { |
duke@435 | 366 | if (waitingToLockBlocker->is_a(SystemDictionary::abstract_ownable_synchronizer_klass())) { |
duke@435 | 367 | oop threadObj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(waitingToLockBlocker); |
duke@435 | 368 | currentThread = threadObj != NULL ? java_lang_Thread::thread(threadObj) : NULL; |
duke@435 | 369 | } else { |
duke@435 | 370 | currentThread = NULL; |
duke@435 | 371 | } |
duke@435 | 372 | } |
duke@435 | 373 | } |
duke@435 | 374 | |
duke@435 | 375 | if (currentThread == NULL) { |
duke@435 | 376 | // No dependency on another thread |
duke@435 | 377 | break; |
duke@435 | 378 | } |
duke@435 | 379 | if (currentThread->depth_first_number() < 0) { |
duke@435 | 380 | // First visit to this thread |
duke@435 | 381 | currentThread->set_depth_first_number(globalDfn++); |
duke@435 | 382 | } else if (currentThread->depth_first_number() < thisDfn) { |
duke@435 | 383 | // Thread already visited, and not on a (new) cycle |
duke@435 | 384 | break; |
duke@435 | 385 | } else if (currentThread == previousThread) { |
duke@435 | 386 | // Self-loop, ignore |
duke@435 | 387 | break; |
duke@435 | 388 | } else { |
duke@435 | 389 | // We have a (new) cycle |
duke@435 | 390 | num_deadlocks++; |
duke@435 | 391 | |
duke@435 | 392 | cycle->set_deadlock(true); |
duke@435 | 393 | |
duke@435 | 394 | // add this cycle to the deadlocks list |
duke@435 | 395 | if (deadlocks == NULL) { |
duke@435 | 396 | deadlocks = cycle; |
duke@435 | 397 | } else { |
duke@435 | 398 | last->set_next(cycle); |
duke@435 | 399 | } |
duke@435 | 400 | last = cycle; |
duke@435 | 401 | cycle = new DeadlockCycle(); |
duke@435 | 402 | break; |
duke@435 | 403 | } |
duke@435 | 404 | previousThread = currentThread; |
duke@435 | 405 | waitingToLockMonitor = (ObjectMonitor*)currentThread->current_pending_monitor(); |
duke@435 | 406 | if (concurrent_locks) { |
duke@435 | 407 | waitingToLockBlocker = currentThread->current_park_blocker(); |
duke@435 | 408 | } |
duke@435 | 409 | } |
duke@435 | 410 | |
duke@435 | 411 | } |
fparain@3381 | 412 | delete cycle; |
duke@435 | 413 | return deadlocks; |
duke@435 | 414 | } |
duke@435 | 415 | |
duke@435 | 416 | ThreadDumpResult::ThreadDumpResult() : _num_threads(0), _num_snapshots(0), _snapshots(NULL), _next(NULL), _last(NULL) { |
duke@435 | 417 | |
duke@435 | 418 | // Create a new ThreadDumpResult object and append to the list. |
coleenp@4037 | 419 | // If GC happens before this function returns, Method* |
duke@435 | 420 | // in the stack trace will be visited. |
duke@435 | 421 | ThreadService::add_thread_dump(this); |
duke@435 | 422 | } |
duke@435 | 423 | |
duke@435 | 424 | ThreadDumpResult::ThreadDumpResult(int num_threads) : _num_threads(num_threads), _num_snapshots(0), _snapshots(NULL), _next(NULL), _last(NULL) { |
duke@435 | 425 | // Create a new ThreadDumpResult object and append to the list. |
duke@435 | 426 | // If GC happens before this function returns, oops |
duke@435 | 427 | // will be visited. |
duke@435 | 428 | ThreadService::add_thread_dump(this); |
duke@435 | 429 | } |
duke@435 | 430 | |
duke@435 | 431 | ThreadDumpResult::~ThreadDumpResult() { |
duke@435 | 432 | ThreadService::remove_thread_dump(this); |
duke@435 | 433 | |
duke@435 | 434 | // free all the ThreadSnapshot objects created during |
duke@435 | 435 | // the VM_ThreadDump operation |
duke@435 | 436 | ThreadSnapshot* ts = _snapshots; |
duke@435 | 437 | while (ts != NULL) { |
duke@435 | 438 | ThreadSnapshot* p = ts; |
duke@435 | 439 | ts = ts->next(); |
duke@435 | 440 | delete p; |
duke@435 | 441 | } |
duke@435 | 442 | } |
duke@435 | 443 | |
duke@435 | 444 | |
duke@435 | 445 | void ThreadDumpResult::add_thread_snapshot(ThreadSnapshot* ts) { |
duke@435 | 446 | assert(_num_threads == 0 || _num_snapshots < _num_threads, |
duke@435 | 447 | "_num_snapshots must be less than _num_threads"); |
duke@435 | 448 | _num_snapshots++; |
duke@435 | 449 | if (_snapshots == NULL) { |
duke@435 | 450 | _snapshots = ts; |
duke@435 | 451 | } else { |
duke@435 | 452 | _last->set_next(ts); |
duke@435 | 453 | } |
duke@435 | 454 | _last = ts; |
duke@435 | 455 | } |
duke@435 | 456 | |
duke@435 | 457 | void ThreadDumpResult::oops_do(OopClosure* f) { |
duke@435 | 458 | for (ThreadSnapshot* ts = _snapshots; ts != NULL; ts = ts->next()) { |
duke@435 | 459 | ts->oops_do(f); |
duke@435 | 460 | } |
duke@435 | 461 | } |
duke@435 | 462 | |
sla@6122 | 463 | void ThreadDumpResult::metadata_do(void f(Metadata*)) { |
sla@6122 | 464 | for (ThreadSnapshot* ts = _snapshots; ts != NULL; ts = ts->next()) { |
sla@6122 | 465 | ts->metadata_do(f); |
sla@6122 | 466 | } |
sla@6122 | 467 | } |
sla@6122 | 468 | |
duke@435 | 469 | StackFrameInfo::StackFrameInfo(javaVFrame* jvf, bool with_lock_info) { |
duke@435 | 470 | _method = jvf->method(); |
duke@435 | 471 | _bci = jvf->bci(); |
sla@6122 | 472 | _class_holder = _method->method_holder()->klass_holder(); |
duke@435 | 473 | _locked_monitors = NULL; |
duke@435 | 474 | if (with_lock_info) { |
duke@435 | 475 | ResourceMark rm; |
duke@435 | 476 | GrowableArray<MonitorInfo*>* list = jvf->locked_monitors(); |
duke@435 | 477 | int length = list->length(); |
duke@435 | 478 | if (length > 0) { |
zgu@3900 | 479 | _locked_monitors = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(length, true); |
duke@435 | 480 | for (int i = 0; i < length; i++) { |
duke@435 | 481 | MonitorInfo* monitor = list->at(i); |
duke@435 | 482 | assert(monitor->owner(), "This monitor must have an owning object"); |
duke@435 | 483 | _locked_monitors->append(monitor->owner()); |
duke@435 | 484 | } |
duke@435 | 485 | } |
duke@435 | 486 | } |
duke@435 | 487 | } |
duke@435 | 488 | |
duke@435 | 489 | void StackFrameInfo::oops_do(OopClosure* f) { |
duke@435 | 490 | if (_locked_monitors != NULL) { |
duke@435 | 491 | int length = _locked_monitors->length(); |
duke@435 | 492 | for (int i = 0; i < length; i++) { |
duke@435 | 493 | f->do_oop((oop*) _locked_monitors->adr_at(i)); |
duke@435 | 494 | } |
duke@435 | 495 | } |
sla@6122 | 496 | f->do_oop(&_class_holder); |
sla@6122 | 497 | } |
sla@6122 | 498 | |
sla@6122 | 499 | void StackFrameInfo::metadata_do(void f(Metadata*)) { |
sla@6122 | 500 | f(_method); |
duke@435 | 501 | } |
duke@435 | 502 | |
duke@435 | 503 | void StackFrameInfo::print_on(outputStream* st) const { |
duke@435 | 504 | ResourceMark rm; |
duke@435 | 505 | java_lang_Throwable::print_stack_element(st, method(), bci()); |
duke@435 | 506 | int len = (_locked_monitors != NULL ? _locked_monitors->length() : 0); |
duke@435 | 507 | for (int i = 0; i < len; i++) { |
duke@435 | 508 | oop o = _locked_monitors->at(i); |
coleenp@4037 | 509 | InstanceKlass* ik = InstanceKlass::cast(o->klass()); |
duke@435 | 510 | st->print_cr("\t- locked <" INTPTR_FORMAT "> (a %s)", (address)o, ik->external_name()); |
duke@435 | 511 | } |
duke@435 | 512 | |
duke@435 | 513 | } |
duke@435 | 514 | |
duke@435 | 515 | // Iterate through monitor cache to find JNI locked monitors |
duke@435 | 516 | class InflatedMonitorsClosure: public MonitorClosure { |
duke@435 | 517 | private: |
duke@435 | 518 | ThreadStackTrace* _stack_trace; |
duke@435 | 519 | Thread* _thread; |
duke@435 | 520 | public: |
duke@435 | 521 | InflatedMonitorsClosure(Thread* t, ThreadStackTrace* st) { |
duke@435 | 522 | _thread = t; |
duke@435 | 523 | _stack_trace = st; |
duke@435 | 524 | } |
duke@435 | 525 | void do_monitor(ObjectMonitor* mid) { |
duke@435 | 526 | if (mid->owner() == _thread) { |
duke@435 | 527 | oop object = (oop) mid->object(); |
duke@435 | 528 | if (!_stack_trace->is_owned_monitor_on_stack(object)) { |
duke@435 | 529 | _stack_trace->add_jni_locked_monitor(object); |
duke@435 | 530 | } |
duke@435 | 531 | } |
duke@435 | 532 | } |
duke@435 | 533 | }; |
duke@435 | 534 | |
duke@435 | 535 | ThreadStackTrace::ThreadStackTrace(JavaThread* t, bool with_locked_monitors) { |
duke@435 | 536 | _thread = t; |
zgu@3900 | 537 | _frames = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<StackFrameInfo*>(INITIAL_ARRAY_SIZE, true); |
duke@435 | 538 | _depth = 0; |
duke@435 | 539 | _with_locked_monitors = with_locked_monitors; |
duke@435 | 540 | if (_with_locked_monitors) { |
zgu@3900 | 541 | _jni_locked_monitors = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(INITIAL_ARRAY_SIZE, true); |
duke@435 | 542 | } else { |
duke@435 | 543 | _jni_locked_monitors = NULL; |
duke@435 | 544 | } |
duke@435 | 545 | } |
duke@435 | 546 | |
duke@435 | 547 | ThreadStackTrace::~ThreadStackTrace() { |
duke@435 | 548 | for (int i = 0; i < _frames->length(); i++) { |
duke@435 | 549 | delete _frames->at(i); |
duke@435 | 550 | } |
duke@435 | 551 | delete _frames; |
duke@435 | 552 | if (_jni_locked_monitors != NULL) { |
duke@435 | 553 | delete _jni_locked_monitors; |
duke@435 | 554 | } |
duke@435 | 555 | } |
duke@435 | 556 | |
duke@435 | 557 | void ThreadStackTrace::dump_stack_at_safepoint(int maxDepth) { |
duke@435 | 558 | assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
duke@435 | 559 | |
duke@435 | 560 | if (_thread->has_last_Java_frame()) { |
duke@435 | 561 | RegisterMap reg_map(_thread); |
duke@435 | 562 | vframe* start_vf = _thread->last_java_vframe(®_map); |
duke@435 | 563 | int count = 0; |
duke@435 | 564 | for (vframe* f = start_vf; f; f = f->sender() ) { |
duke@435 | 565 | if (f->is_java_frame()) { |
duke@435 | 566 | javaVFrame* jvf = javaVFrame::cast(f); |
duke@435 | 567 | add_stack_frame(jvf); |
duke@435 | 568 | count++; |
duke@435 | 569 | } else { |
duke@435 | 570 | // Ignore non-Java frames |
duke@435 | 571 | } |
duke@435 | 572 | if (maxDepth > 0 && count == maxDepth) { |
duke@435 | 573 | // Skip frames if more than maxDepth |
duke@435 | 574 | break; |
duke@435 | 575 | } |
duke@435 | 576 | } |
duke@435 | 577 | } |
duke@435 | 578 | |
duke@435 | 579 | if (_with_locked_monitors) { |
duke@435 | 580 | // Iterate inflated monitors and find monitors locked by this thread |
duke@435 | 581 | // not found in the stack |
duke@435 | 582 | InflatedMonitorsClosure imc(_thread, this); |
duke@435 | 583 | ObjectSynchronizer::monitors_iterate(&imc); |
duke@435 | 584 | } |
duke@435 | 585 | } |
duke@435 | 586 | |
duke@435 | 587 | |
duke@435 | 588 | bool ThreadStackTrace::is_owned_monitor_on_stack(oop object) { |
duke@435 | 589 | assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
duke@435 | 590 | |
duke@435 | 591 | bool found = false; |
duke@435 | 592 | int num_frames = get_stack_depth(); |
duke@435 | 593 | for (int depth = 0; depth < num_frames; depth++) { |
duke@435 | 594 | StackFrameInfo* frame = stack_frame_at(depth); |
duke@435 | 595 | int len = frame->num_locked_monitors(); |
duke@435 | 596 | GrowableArray<oop>* locked_monitors = frame->locked_monitors(); |
duke@435 | 597 | for (int j = 0; j < len; j++) { |
duke@435 | 598 | oop monitor = locked_monitors->at(j); |
duke@435 | 599 | assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); |
duke@435 | 600 | if (monitor == object) { |
duke@435 | 601 | found = true; |
duke@435 | 602 | break; |
duke@435 | 603 | } |
duke@435 | 604 | } |
duke@435 | 605 | } |
duke@435 | 606 | return found; |
duke@435 | 607 | } |
duke@435 | 608 | |
duke@435 | 609 | Handle ThreadStackTrace::allocate_fill_stack_trace_element_array(TRAPS) { |
coleenp@4037 | 610 | Klass* k = SystemDictionary::StackTraceElement_klass(); |
jrose@567 | 611 | assert(k != NULL, "must be loaded in 1.4+"); |
duke@435 | 612 | instanceKlassHandle ik(THREAD, k); |
duke@435 | 613 | |
duke@435 | 614 | // Allocate an array of java/lang/StackTraceElement object |
duke@435 | 615 | objArrayOop ste = oopFactory::new_objArray(ik(), _depth, CHECK_NH); |
duke@435 | 616 | objArrayHandle backtrace(THREAD, ste); |
duke@435 | 617 | for (int j = 0; j < _depth; j++) { |
duke@435 | 618 | StackFrameInfo* frame = _frames->at(j); |
duke@435 | 619 | methodHandle mh(THREAD, frame->method()); |
duke@435 | 620 | oop element = java_lang_StackTraceElement::create(mh, frame->bci(), CHECK_NH); |
duke@435 | 621 | backtrace->obj_at_put(j, element); |
duke@435 | 622 | } |
duke@435 | 623 | return backtrace; |
duke@435 | 624 | } |
duke@435 | 625 | |
duke@435 | 626 | void ThreadStackTrace::add_stack_frame(javaVFrame* jvf) { |
duke@435 | 627 | StackFrameInfo* frame = new StackFrameInfo(jvf, _with_locked_monitors); |
duke@435 | 628 | _frames->append(frame); |
duke@435 | 629 | _depth++; |
duke@435 | 630 | } |
duke@435 | 631 | |
duke@435 | 632 | void ThreadStackTrace::oops_do(OopClosure* f) { |
duke@435 | 633 | int length = _frames->length(); |
duke@435 | 634 | for (int i = 0; i < length; i++) { |
duke@435 | 635 | _frames->at(i)->oops_do(f); |
duke@435 | 636 | } |
duke@435 | 637 | |
duke@435 | 638 | length = (_jni_locked_monitors != NULL ? _jni_locked_monitors->length() : 0); |
duke@435 | 639 | for (int j = 0; j < length; j++) { |
duke@435 | 640 | f->do_oop((oop*) _jni_locked_monitors->adr_at(j)); |
duke@435 | 641 | } |
duke@435 | 642 | } |
duke@435 | 643 | |
sla@6122 | 644 | void ThreadStackTrace::metadata_do(void f(Metadata*)) { |
sla@6122 | 645 | int length = _frames->length(); |
sla@6122 | 646 | for (int i = 0; i < length; i++) { |
sla@6122 | 647 | _frames->at(i)->metadata_do(f); |
sla@6122 | 648 | } |
sla@6122 | 649 | } |
sla@6122 | 650 | |
sla@6122 | 651 | |
duke@435 | 652 | ConcurrentLocksDump::~ConcurrentLocksDump() { |
duke@435 | 653 | if (_retain_map_on_free) { |
duke@435 | 654 | return; |
duke@435 | 655 | } |
duke@435 | 656 | |
duke@435 | 657 | for (ThreadConcurrentLocks* t = _map; t != NULL;) { |
duke@435 | 658 | ThreadConcurrentLocks* tcl = t; |
duke@435 | 659 | t = t->next(); |
duke@435 | 660 | delete tcl; |
duke@435 | 661 | } |
duke@435 | 662 | } |
duke@435 | 663 | |
duke@435 | 664 | void ConcurrentLocksDump::dump_at_safepoint() { |
duke@435 | 665 | // dump all locked concurrent locks |
duke@435 | 666 | assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
duke@435 | 667 | |
duke@435 | 668 | if (JDK_Version::is_gte_jdk16x_version()) { |
duke@435 | 669 | ResourceMark rm; |
duke@435 | 670 | |
duke@435 | 671 | GrowableArray<oop>* aos_objects = new GrowableArray<oop>(INITIAL_ARRAY_SIZE); |
duke@435 | 672 | |
duke@435 | 673 | // Find all instances of AbstractOwnableSynchronizer |
duke@435 | 674 | HeapInspection::find_instances_at_safepoint(SystemDictionary::abstract_ownable_synchronizer_klass(), |
duke@435 | 675 | aos_objects); |
duke@435 | 676 | // Build a map of thread to its owned AQS locks |
duke@435 | 677 | build_map(aos_objects); |
duke@435 | 678 | } |
duke@435 | 679 | } |
duke@435 | 680 | |
duke@435 | 681 | |
duke@435 | 682 | // build a map of JavaThread to all its owned AbstractOwnableSynchronizer |
duke@435 | 683 | void ConcurrentLocksDump::build_map(GrowableArray<oop>* aos_objects) { |
duke@435 | 684 | int length = aos_objects->length(); |
duke@435 | 685 | for (int i = 0; i < length; i++) { |
duke@435 | 686 | oop o = aos_objects->at(i); |
duke@435 | 687 | oop owner_thread_obj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(o); |
duke@435 | 688 | if (owner_thread_obj != NULL) { |
duke@435 | 689 | JavaThread* thread = java_lang_Thread::thread(owner_thread_obj); |
duke@435 | 690 | assert(o->is_instance(), "Must be an instanceOop"); |
duke@435 | 691 | add_lock(thread, (instanceOop) o); |
duke@435 | 692 | } |
duke@435 | 693 | } |
duke@435 | 694 | } |
duke@435 | 695 | |
duke@435 | 696 | void ConcurrentLocksDump::add_lock(JavaThread* thread, instanceOop o) { |
duke@435 | 697 | ThreadConcurrentLocks* tcl = thread_concurrent_locks(thread); |
duke@435 | 698 | if (tcl != NULL) { |
duke@435 | 699 | tcl->add_lock(o); |
duke@435 | 700 | return; |
duke@435 | 701 | } |
duke@435 | 702 | |
duke@435 | 703 | // First owned lock found for this thread |
duke@435 | 704 | tcl = new ThreadConcurrentLocks(thread); |
duke@435 | 705 | tcl->add_lock(o); |
duke@435 | 706 | if (_map == NULL) { |
duke@435 | 707 | _map = tcl; |
duke@435 | 708 | } else { |
duke@435 | 709 | _last->set_next(tcl); |
duke@435 | 710 | } |
duke@435 | 711 | _last = tcl; |
duke@435 | 712 | } |
duke@435 | 713 | |
duke@435 | 714 | ThreadConcurrentLocks* ConcurrentLocksDump::thread_concurrent_locks(JavaThread* thread) { |
duke@435 | 715 | for (ThreadConcurrentLocks* tcl = _map; tcl != NULL; tcl = tcl->next()) { |
duke@435 | 716 | if (tcl->java_thread() == thread) { |
duke@435 | 717 | return tcl; |
duke@435 | 718 | } |
duke@435 | 719 | } |
duke@435 | 720 | return NULL; |
duke@435 | 721 | } |
duke@435 | 722 | |
duke@435 | 723 | void ConcurrentLocksDump::print_locks_on(JavaThread* t, outputStream* st) { |
duke@435 | 724 | st->print_cr(" Locked ownable synchronizers:"); |
duke@435 | 725 | ThreadConcurrentLocks* tcl = thread_concurrent_locks(t); |
duke@435 | 726 | GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); |
duke@435 | 727 | if (locks == NULL || locks->is_empty()) { |
duke@435 | 728 | st->print_cr("\t- None"); |
duke@435 | 729 | st->cr(); |
duke@435 | 730 | return; |
duke@435 | 731 | } |
duke@435 | 732 | |
duke@435 | 733 | for (int i = 0; i < locks->length(); i++) { |
duke@435 | 734 | instanceOop obj = locks->at(i); |
coleenp@4037 | 735 | InstanceKlass* ik = InstanceKlass::cast(obj->klass()); |
duke@435 | 736 | st->print_cr("\t- <" INTPTR_FORMAT "> (a %s)", (address)obj, ik->external_name()); |
duke@435 | 737 | } |
duke@435 | 738 | st->cr(); |
duke@435 | 739 | } |
duke@435 | 740 | |
duke@435 | 741 | ThreadConcurrentLocks::ThreadConcurrentLocks(JavaThread* thread) { |
duke@435 | 742 | _thread = thread; |
zgu@3900 | 743 | _owned_locks = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<instanceOop>(INITIAL_ARRAY_SIZE, true); |
duke@435 | 744 | _next = NULL; |
duke@435 | 745 | } |
duke@435 | 746 | |
duke@435 | 747 | ThreadConcurrentLocks::~ThreadConcurrentLocks() { |
duke@435 | 748 | delete _owned_locks; |
duke@435 | 749 | } |
duke@435 | 750 | |
duke@435 | 751 | void ThreadConcurrentLocks::add_lock(instanceOop o) { |
duke@435 | 752 | _owned_locks->append(o); |
duke@435 | 753 | } |
duke@435 | 754 | |
duke@435 | 755 | void ThreadConcurrentLocks::oops_do(OopClosure* f) { |
duke@435 | 756 | int length = _owned_locks->length(); |
duke@435 | 757 | for (int i = 0; i < length; i++) { |
duke@435 | 758 | f->do_oop((oop*) _owned_locks->adr_at(i)); |
duke@435 | 759 | } |
duke@435 | 760 | } |
duke@435 | 761 | |
duke@435 | 762 | ThreadStatistics::ThreadStatistics() { |
duke@435 | 763 | _contended_enter_count = 0; |
duke@435 | 764 | _monitor_wait_count = 0; |
duke@435 | 765 | _sleep_count = 0; |
duke@435 | 766 | _count_pending_reset = false; |
duke@435 | 767 | _timer_pending_reset = false; |
mchung@1310 | 768 | memset((void*) _perf_recursion_counts, 0, sizeof(_perf_recursion_counts)); |
duke@435 | 769 | } |
duke@435 | 770 | |
duke@435 | 771 | ThreadSnapshot::ThreadSnapshot(JavaThread* thread) { |
duke@435 | 772 | _thread = thread; |
duke@435 | 773 | _threadObj = thread->threadObj(); |
duke@435 | 774 | _stack_trace = NULL; |
duke@435 | 775 | _concurrent_locks = NULL; |
duke@435 | 776 | _next = NULL; |
duke@435 | 777 | |
duke@435 | 778 | ThreadStatistics* stat = thread->get_thread_stat(); |
duke@435 | 779 | _contended_enter_ticks = stat->contended_enter_ticks(); |
duke@435 | 780 | _contended_enter_count = stat->contended_enter_count(); |
duke@435 | 781 | _monitor_wait_ticks = stat->monitor_wait_ticks(); |
duke@435 | 782 | _monitor_wait_count = stat->monitor_wait_count(); |
duke@435 | 783 | _sleep_ticks = stat->sleep_ticks(); |
duke@435 | 784 | _sleep_count = stat->sleep_count(); |
duke@435 | 785 | |
duke@435 | 786 | _blocker_object = NULL; |
duke@435 | 787 | _blocker_object_owner = NULL; |
duke@435 | 788 | |
duke@435 | 789 | _thread_status = java_lang_Thread::get_thread_status(_threadObj); |
duke@435 | 790 | _is_ext_suspended = thread->is_being_ext_suspended(); |
duke@435 | 791 | _is_in_native = (thread->thread_state() == _thread_in_native); |
duke@435 | 792 | |
duke@435 | 793 | if (_thread_status == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER || |
duke@435 | 794 | _thread_status == java_lang_Thread::IN_OBJECT_WAIT || |
duke@435 | 795 | _thread_status == java_lang_Thread::IN_OBJECT_WAIT_TIMED) { |
duke@435 | 796 | |
duke@435 | 797 | Handle obj = ThreadService::get_current_contended_monitor(thread); |
duke@435 | 798 | if (obj() == NULL) { |
duke@435 | 799 | // monitor no longer exists; thread is not blocked |
duke@435 | 800 | _thread_status = java_lang_Thread::RUNNABLE; |
duke@435 | 801 | } else { |
duke@435 | 802 | _blocker_object = obj(); |
duke@435 | 803 | JavaThread* owner = ObjectSynchronizer::get_lock_owner(obj, false); |
duke@435 | 804 | if ((owner == NULL && _thread_status == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER) |
dcubed@3202 | 805 | || (owner != NULL && owner->is_attaching_via_jni())) { |
duke@435 | 806 | // ownership information of the monitor is not available |
duke@435 | 807 | // (may no longer be owned or releasing to some other thread) |
duke@435 | 808 | // make this thread in RUNNABLE state. |
duke@435 | 809 | // And when the owner thread is in attaching state, the java thread |
duke@435 | 810 | // is not completely initialized. For example thread name and id |
duke@435 | 811 | // and may not be set, so hide the attaching thread. |
duke@435 | 812 | _thread_status = java_lang_Thread::RUNNABLE; |
duke@435 | 813 | _blocker_object = NULL; |
duke@435 | 814 | } else if (owner != NULL) { |
duke@435 | 815 | _blocker_object_owner = owner->threadObj(); |
duke@435 | 816 | } |
duke@435 | 817 | } |
duke@435 | 818 | } |
duke@435 | 819 | |
duke@435 | 820 | // Support for JSR-166 locks |
kamg@677 | 821 | if (JDK_Version::current().supports_thread_park_blocker() && |
duke@435 | 822 | (_thread_status == java_lang_Thread::PARKED || |
duke@435 | 823 | _thread_status == java_lang_Thread::PARKED_TIMED)) { |
duke@435 | 824 | |
duke@435 | 825 | _blocker_object = thread->current_park_blocker(); |
duke@435 | 826 | if (_blocker_object != NULL && _blocker_object->is_a(SystemDictionary::abstract_ownable_synchronizer_klass())) { |
duke@435 | 827 | _blocker_object_owner = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(_blocker_object); |
duke@435 | 828 | } |
duke@435 | 829 | } |
duke@435 | 830 | } |
duke@435 | 831 | |
duke@435 | 832 | ThreadSnapshot::~ThreadSnapshot() { |
duke@435 | 833 | delete _stack_trace; |
duke@435 | 834 | delete _concurrent_locks; |
duke@435 | 835 | } |
duke@435 | 836 | |
duke@435 | 837 | void ThreadSnapshot::dump_stack_at_safepoint(int max_depth, bool with_locked_monitors) { |
duke@435 | 838 | _stack_trace = new ThreadStackTrace(_thread, with_locked_monitors); |
duke@435 | 839 | _stack_trace->dump_stack_at_safepoint(max_depth); |
duke@435 | 840 | } |
duke@435 | 841 | |
duke@435 | 842 | |
duke@435 | 843 | void ThreadSnapshot::oops_do(OopClosure* f) { |
duke@435 | 844 | f->do_oop(&_threadObj); |
duke@435 | 845 | f->do_oop(&_blocker_object); |
duke@435 | 846 | f->do_oop(&_blocker_object_owner); |
duke@435 | 847 | if (_stack_trace != NULL) { |
duke@435 | 848 | _stack_trace->oops_do(f); |
duke@435 | 849 | } |
duke@435 | 850 | if (_concurrent_locks != NULL) { |
duke@435 | 851 | _concurrent_locks->oops_do(f); |
duke@435 | 852 | } |
duke@435 | 853 | } |
duke@435 | 854 | |
sla@6122 | 855 | void ThreadSnapshot::metadata_do(void f(Metadata*)) { |
sla@6122 | 856 | if (_stack_trace != NULL) { |
sla@6122 | 857 | _stack_trace->metadata_do(f); |
sla@6122 | 858 | } |
sla@6122 | 859 | } |
sla@6122 | 860 | |
sla@6122 | 861 | |
duke@435 | 862 | DeadlockCycle::DeadlockCycle() { |
duke@435 | 863 | _is_deadlock = false; |
zgu@3900 | 864 | _threads = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaThread*>(INITIAL_ARRAY_SIZE, true); |
duke@435 | 865 | _next = NULL; |
duke@435 | 866 | } |
duke@435 | 867 | |
duke@435 | 868 | DeadlockCycle::~DeadlockCycle() { |
duke@435 | 869 | delete _threads; |
duke@435 | 870 | } |
duke@435 | 871 | |
duke@435 | 872 | void DeadlockCycle::print_on(outputStream* st) const { |
duke@435 | 873 | st->cr(); |
duke@435 | 874 | st->print_cr("Found one Java-level deadlock:"); |
duke@435 | 875 | st->print("============================="); |
duke@435 | 876 | |
duke@435 | 877 | JavaThread* currentThread; |
duke@435 | 878 | ObjectMonitor* waitingToLockMonitor; |
duke@435 | 879 | oop waitingToLockBlocker; |
duke@435 | 880 | int len = _threads->length(); |
duke@435 | 881 | for (int i = 0; i < len; i++) { |
duke@435 | 882 | currentThread = _threads->at(i); |
duke@435 | 883 | waitingToLockMonitor = (ObjectMonitor*)currentThread->current_pending_monitor(); |
duke@435 | 884 | waitingToLockBlocker = currentThread->current_park_blocker(); |
duke@435 | 885 | st->cr(); |
duke@435 | 886 | st->print_cr("\"%s\":", currentThread->get_thread_name()); |
duke@435 | 887 | const char* owner_desc = ",\n which is held by"; |
duke@435 | 888 | if (waitingToLockMonitor != NULL) { |
duke@435 | 889 | st->print(" waiting to lock monitor " INTPTR_FORMAT, waitingToLockMonitor); |
duke@435 | 890 | oop obj = (oop)waitingToLockMonitor->object(); |
duke@435 | 891 | if (obj != NULL) { |
duke@435 | 892 | st->print(" (object "INTPTR_FORMAT ", a %s)", (address)obj, |
coleenp@4037 | 893 | (InstanceKlass::cast(obj->klass()))->external_name()); |
duke@435 | 894 | |
duke@435 | 895 | if (!currentThread->current_pending_monitor_is_from_java()) { |
duke@435 | 896 | owner_desc = "\n in JNI, which is held by"; |
duke@435 | 897 | } |
duke@435 | 898 | } else { |
duke@435 | 899 | // No Java object associated - a JVMTI raw monitor |
duke@435 | 900 | owner_desc = " (JVMTI raw monitor),\n which is held by"; |
duke@435 | 901 | } |
duke@435 | 902 | currentThread = Threads::owning_thread_from_monitor_owner( |
dcubed@4673 | 903 | (address)waitingToLockMonitor->owner(), |
dcubed@4673 | 904 | false /* no locking needed */); |
dcubed@4673 | 905 | if (currentThread == NULL) { |
dcubed@4673 | 906 | // The deadlock was detected at a safepoint so the JavaThread |
dcubed@4673 | 907 | // that owns waitingToLockMonitor should be findable, but |
dcubed@4673 | 908 | // if it is not findable, then the previous currentThread is |
dcubed@4673 | 909 | // blocked permanently. |
dcubed@4673 | 910 | st->print("%s UNKNOWN_owner_addr=" PTR_FORMAT, owner_desc, |
dcubed@4673 | 911 | (address)waitingToLockMonitor->owner()); |
dcubed@4673 | 912 | continue; |
dcubed@4673 | 913 | } |
duke@435 | 914 | } else { |
duke@435 | 915 | st->print(" waiting for ownable synchronizer " INTPTR_FORMAT ", (a %s)", |
duke@435 | 916 | (address)waitingToLockBlocker, |
coleenp@4037 | 917 | (InstanceKlass::cast(waitingToLockBlocker->klass()))->external_name()); |
duke@435 | 918 | assert(waitingToLockBlocker->is_a(SystemDictionary::abstract_ownable_synchronizer_klass()), |
duke@435 | 919 | "Must be an AbstractOwnableSynchronizer"); |
duke@435 | 920 | oop ownerObj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(waitingToLockBlocker); |
duke@435 | 921 | currentThread = java_lang_Thread::thread(ownerObj); |
duke@435 | 922 | } |
duke@435 | 923 | st->print("%s \"%s\"", owner_desc, currentThread->get_thread_name()); |
duke@435 | 924 | } |
duke@435 | 925 | |
duke@435 | 926 | st->cr(); |
duke@435 | 927 | st->cr(); |
duke@435 | 928 | |
duke@435 | 929 | // Print stack traces |
duke@435 | 930 | bool oldJavaMonitorsInStackTrace = JavaMonitorsInStackTrace; |
duke@435 | 931 | JavaMonitorsInStackTrace = true; |
duke@435 | 932 | st->print_cr("Java stack information for the threads listed above:"); |
duke@435 | 933 | st->print_cr("==================================================="); |
duke@435 | 934 | for (int j = 0; j < len; j++) { |
duke@435 | 935 | currentThread = _threads->at(j); |
duke@435 | 936 | st->print_cr("\"%s\":", currentThread->get_thread_name()); |
duke@435 | 937 | currentThread->print_stack_on(st); |
duke@435 | 938 | } |
duke@435 | 939 | JavaMonitorsInStackTrace = oldJavaMonitorsInStackTrace; |
duke@435 | 940 | } |
duke@435 | 941 | |
duke@435 | 942 | ThreadsListEnumerator::ThreadsListEnumerator(Thread* cur_thread, |
duke@435 | 943 | bool include_jvmti_agent_threads, |
duke@435 | 944 | bool include_jni_attaching_threads) { |
duke@435 | 945 | assert(cur_thread == Thread::current(), "Check current thread"); |
duke@435 | 946 | |
duke@435 | 947 | int init_size = ThreadService::get_live_thread_count(); |
duke@435 | 948 | _threads_array = new GrowableArray<instanceHandle>(init_size); |
duke@435 | 949 | |
duke@435 | 950 | MutexLockerEx ml(Threads_lock); |
duke@435 | 951 | |
duke@435 | 952 | for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) { |
duke@435 | 953 | // skips JavaThreads in the process of exiting |
duke@435 | 954 | // and also skips VM internal JavaThreads |
duke@435 | 955 | // Threads in _thread_new or _thread_new_trans state are included. |
duke@435 | 956 | // i.e. threads have been started but not yet running. |
duke@435 | 957 | if (jt->threadObj() == NULL || |
duke@435 | 958 | jt->is_exiting() || |
duke@435 | 959 | !java_lang_Thread::is_alive(jt->threadObj()) || |
duke@435 | 960 | jt->is_hidden_from_external_view()) { |
duke@435 | 961 | continue; |
duke@435 | 962 | } |
duke@435 | 963 | |
duke@435 | 964 | // skip agent threads |
duke@435 | 965 | if (!include_jvmti_agent_threads && jt->is_jvmti_agent_thread()) { |
duke@435 | 966 | continue; |
duke@435 | 967 | } |
duke@435 | 968 | |
duke@435 | 969 | // skip jni threads in the process of attaching |
dcubed@3202 | 970 | if (!include_jni_attaching_threads && jt->is_attaching_via_jni()) { |
duke@435 | 971 | continue; |
duke@435 | 972 | } |
duke@435 | 973 | |
duke@435 | 974 | instanceHandle h(cur_thread, (instanceOop) jt->threadObj()); |
duke@435 | 975 | _threads_array->append(h); |
duke@435 | 976 | } |
duke@435 | 977 | } |