osfmk/vm/vm_fault.c

2761 	vm_object_t		cur_object;
2897 	 *	the shadow chain each time.  cur_object and cur_offset
2900 	 *	top level if and only if object and cur_object are the same.
2903 	 *		original object and cur_object (if different) when
2918 	cur_object = object;
2922 		if (!cur_object->pager_created &&
2923 		    cur_object->phys_contiguous) /* superpage */
2926 		if (cur_object->blocked_access) {
2934 		m = vm_page_lookup(cur_object, cur_offset);
2944 				if (object != cur_object) {
2951 						if (vm_object_lock_upgrade(cur_object) == FALSE) {
2991 				vm_object_unlock(cur_object);
3005 				if (object != cur_object) {
3010 						vm_object_unlock(cur_object);
3056 				if (object != cur_object)
3061 				vm_object_unlock(cur_object);
3079 			        if (object != cur_object) {
3086 						if (vm_object_lock_upgrade(cur_object) == FALSE) {
3131 				vm_object_unlock(cur_object);
3145 			        if (object != cur_object) {
3148 						vm_object_unlock(cur_object);
3174 			        if (object != cur_object) {
3177 						vm_object_unlock(cur_object);
3215 			if (object == cur_object && object->copy == VM_OBJECT_NULL) {
3222 			  	if (object != cur_object) {
3246 					object = cur_object;
3255 				 * cur_object == NULL or it's been unlocked
3256 				 * no paging references on either object or cur_object
3352 				if (object != cur_object)
3353 					vm_object_unlock(cur_object);
3377 			if (cur_object == object) {
3403 			 * object and cur_object... no need to take
3436 			if (!cur_object->internal &&
3437 			    cur_object->copy_strategy == MEMORY_OBJECT_COPY_DELAY) {
3446 			        if (cur_object->copy == object) {
3453 				} else if (cur_object->copy == object->shadow &&
3461 			vm_object_unlock(cur_object);
3476 			 * No page at cur_object, cur_offset... m == NULL
3478 			if (cur_object->pager_created) {
3479 			        if (MUST_ASK_PAGER(cur_object, cur_offset) == TRUE) {
3491 			if (cur_object->shadow == VM_OBJECT_NULL) {
3496 				if (cur_object->shadow_severed ||
3497 				    VM_OBJECT_PURGEABLE_FAULT_ERROR(cur_object))
3499 					if (object != cur_object)
3500 					        vm_object_unlock(cur_object);
3517 					if (object != cur_object)
3518 						vm_object_unlock(cur_object);
3545 			  	if (cur_object != object) {
3546 					vm_object_unlock(cur_object);
3548 					cur_object = object;
3594 			cur_offset += cur_object->vo_shadow_offset;
3595 			new_object = cur_object->shadow;
3605 			if (cur_object != object)
3606 				vm_object_unlock(cur_object);
3608 			cur_object = new_object;
3617 	if (object != cur_object)
3618 		vm_object_unlock(cur_object);