dev/dtrace/dtrace.c

275  *     probe context is lock-free -- synchronization is handled via the
284  * The lock ordering between these three locks is dtrace_meta_lock before
292  * role as a coarse-grained lock; it is acquired before both of these locks.
300 static kmutex_t		dtrace_lock;		/* probe state lock */
301 static kmutex_t		dtrace_provider_lock;	/* provider state lock */
302 static kmutex_t		dtrace_meta_lock;	/* meta-provider state lock */
321 static lck_mtx_t	dtrace_lock;		/* probe state lock */
322 static lck_mtx_t	dtrace_provider_lock;	/* provider state lock */
323 static lck_mtx_t	dtrace_meta_lock;	/* meta-provider state lock */
324 static lck_rw_t		dtrace_dof_mode_lock;	/* dof mode lock */
1595 	uintptr_t kdata, lock, nstate;
1679 			while ((lock = *lockp) & 1)
1684 			    (void *)lock, (void *)(lock + 1)) == (void *)lock)
1688 			    (void *)lock, (void *)(lock + 1)) == (void *)lock)
1698 	lock = hash[bucket].dtdh_lock;
1813 		ASSERT(hash[bucket].dtdh_lock == lock);
1814 		ASSERT(lock & 1);
1828 		 * we assert that we aren't doing a dealloc (deallocs lock
1840 		 * of the lock word hasn't changed.  If it has, we may have
1844 			if (hash[bucket].dtdh_lock != lock)
1848 			ASSERT(hash[bucket].dtdh_lock == lock);
1849 			ASSERT(lock & 1);
3557 /* FIXME: awaits lock/mutex work */
3653 /* FIXME: awaits lock/mutex work */
15907 				 * when we released the dtrace lock. We have to dump this generation,
16452 	 * this, because it would lead us to the lock ordering violation
17228 	 * Lock ordering requires the dof mode lock be taken before
18086 	 * Safe to check this outside the dof mode lock
19676 		 * Create the dtrace lock group and attrs.
19723 		(void)dtrace_abs_to_nano(0LL); /* Force once only call to clock_timebase_info (which can take a lock) */