void debug_mutex_wake_waiter(struct mutex *lock, struct mutex_waiter *waiter)
{
SMP_DEBUG_LOCKS_WARN_ON(!spin_is_locked(&lock->wait_lock));
- DEBUG_LOCKS_WARN_ON(list_empty(&lock->wait_list));
- DEBUG_LOCKS_WARN_ON(waiter->magic != waiter);
- DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list));
+ if(DEBUG_LOCKS_WARN_ON(list_empty(&lock->wait_list))){
+ printk("[MUTEX WARN!!]\n");
+ }
+ if(DEBUG_LOCKS_WARN_ON(waiter->magic != waiter)){
+ printk("[MUTEX WARN!!] bad magic number %p:%p\n", waiter->magic, waiter);
+ }
+ if(DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list))){
+ printk("[MUTEX WARN!!] empt waiter list\n");
+ }
}
void debug_mutex_free_waiter(struct mutex_waiter *waiter)
/* Mark the current thread as blocked on the lock: */
ti->task->blocked_on = waiter;
+#ifdef CONFIG_MT_DEBUG_MUTEXES
+ waiter->task_wait_on = lock->owner;
+#endif
}
void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
struct thread_info *ti)
{
- DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list));
- DEBUG_LOCKS_WARN_ON(waiter->task != ti->task);
- DEBUG_LOCKS_WARN_ON(ti->task->blocked_on != waiter);
+ if(DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list))){
+ printk("[MUTEX WARN!!] empty waiter list\n");
+ }
+ if(DEBUG_LOCKS_WARN_ON(waiter->task != ti->task)){
+ printk("[MUTEX WARN!!] waiter task is not the same![%d:%s] != [%d:%s]\n", waiter->task->pid, waiter->task->comm, ti->task->pid, ti->task->comm);
+ }
+ if(DEBUG_LOCKS_WARN_ON(ti->task->blocked_on != waiter)){
+ printk("[MUTEX WARN!!] blocked on different waiter\n");
+ }
ti->task->blocked_on = NULL;
list_del_init(&waiter->list);
waiter->task = NULL;
+#ifdef CONFIG_MT_DEBUG_MUTEXES
+ waiter->task_wait_on = NULL;
+#endif
}
void debug_mutex_unlock(struct mutex *lock)
{
- if (unlikely(!debug_locks))
- return;
+// if (unlikely(!debug_locks))
+// return;
- DEBUG_LOCKS_WARN_ON(lock->magic != lock);
- DEBUG_LOCKS_WARN_ON(lock->owner != current);
- DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
+ if(DEBUG_LOCKS_WARN_ON(lock->magic != lock)){
+ printk("[MUTEX WARN!!] bad lock magic:%p\n", lock->magic);
+ }
+ if(DEBUG_LOCKS_WARN_ON(lock->owner != current)){
+ if(lock->owner != NULL){
+ printk("[MUTEX WARN!!] releasing mutex which is hold by another process, %p\n", lock->owner);
+ printk("[MUTEX WARN!!] current process[%d:%s] is trying to release lock\n But it should be released by lock owner-process[%d:%s]\n", current->pid, current->comm, lock->owner->pid, lock->owner->comm);
+ }else
+ printk("\n[MUTEX WARN!!] imbalanced unlock\n");
+ }
+ if(DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next)){
+ printk("[MUTEX WARN!!] wait_list both empty in prev and next \n");
+ }
mutex_clear_owner(lock);
}
*/
debug_check_no_locks_freed((void *)lock, sizeof(*lock));
lockdep_init_map(&lock->dep_map, name, key, 0);
+#endif
+#ifdef CONFIG_DEBUG_MUTEXES
+ lock->name = name;
#endif
lock->magic = lock;
}