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comparison src/share/vm/services/threadService.cpp @ 10985:ef748153ee8f

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8016304: ThreadMXBean.getDeadlockedThreads reports bogus deadlocks on JDK 8 Reviewed-by: dcubed, mgronlun
author sla
date Mon, 17 Jun 2013 18:35:44 +0200
parents 5ee250974db9
children 0b9ea9a72436
comparison
equal deleted inserted replaced
10984:cd2118b62475 10985:ef748153ee8f
325 waitingToLockBlocker = jt->current_park_blocker(); 325 waitingToLockBlocker = jt->current_park_blocker();
326 } 326 }
327 while (waitingToLockMonitor != NULL || waitingToLockBlocker != NULL) { 327 while (waitingToLockMonitor != NULL || waitingToLockBlocker != NULL) {
328 cycle->add_thread(currentThread); 328 cycle->add_thread(currentThread);
329 if (waitingToLockMonitor != NULL) { 329 if (waitingToLockMonitor != NULL) {
330 currentThread = Threads::owning_thread_from_monitor_owner( 330 address currentOwner = (address)waitingToLockMonitor->owner();
331 (address)waitingToLockMonitor->owner(), 331 if (currentOwner != NULL) {
332 false /* no locking needed */); 332 currentThread = Threads::owning_thread_from_monitor_owner(
333 if (currentThread == NULL) { 333 currentOwner,
334 // This function is called at a safepoint so the JavaThread 334 false /* no locking needed */);
335 // that owns waitingToLockMonitor should be findable, but 335 if (currentThread == NULL) {
336 // if it is not findable, then the previous currentThread is 336 // This function is called at a safepoint so the JavaThread
337 // blocked permanently. We record this as a deadlock. 337 // that owns waitingToLockMonitor should be findable, but
338 num_deadlocks++; 338 // if it is not findable, then the previous currentThread is
339 339 // blocked permanently. We record this as a deadlock.
340 cycle->set_deadlock(true); 340 num_deadlocks++;
341 341
342 // add this cycle to the deadlocks list 342 cycle->set_deadlock(true);
343 if (deadlocks == NULL) { 343
344 deadlocks = cycle; 344 // add this cycle to the deadlocks list
345 } else { 345 if (deadlocks == NULL) {
346 last->set_next(cycle); 346 deadlocks = cycle;
347 } else {
348 last->set_next(cycle);
349 }
350 last = cycle;
351 cycle = new DeadlockCycle();
352 break;
347 } 353 }
348 last = cycle;
349 cycle = new DeadlockCycle();
350 break;
351 } 354 }
352 } else { 355 } else {
353 if (concurrent_locks) { 356 if (concurrent_locks) {
354 if (waitingToLockBlocker->is_a(SystemDictionary::abstract_ownable_synchronizer_klass())) { 357 if (waitingToLockBlocker->is_a(SystemDictionary::abstract_ownable_synchronizer_klass())) {
355 oop threadObj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(waitingToLockBlocker); 358 oop threadObj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(waitingToLockBlocker);