osfmk/vm/vm_object.c

6414 	vm_object_t		object2,
6428 	if (object1 == object2 ||
6430 	    object2 == VM_OBJECT_NULL) {
6444 	if (object1 >  object2) {
6446 		object1 = object2;
6447 		object2 = tmp_object;
6452 	 * while we copy object2 to object1.
6491 	vm_object_lock(object2);
6493 	if (! object2->alive || object2->terminating ||
6494 	    object2->copy || object2->shadow || object2->shadowed ||
6495 	    object2->purgable != VM_PURGABLE_DENY) {
6499 	vm_object_paging_only_wait(object2, THREAD_UNINT);
6502 	if (object1->vo_size != object2->vo_size ||
6524 		 * from object2 to object1.  No need to go through
6527 		while (!queue_empty(&object2->memq)) {
6528 			page = (vm_page_t) queue_first(&object2->memq);
6531 		assert(queue_empty(&object2->memq));
6532 	} else if (object2->phys_contiguous || queue_empty(&object2->memq)) {
6534 		 * No pages in object2, just transfer pages
6535 		 * from object1 to object2.  No need to go through
6540 			vm_page_rename(page, object2, page->offset, FALSE);
6553 		/* transfer object2's pages to object1 */
6554 		while (!queue_empty(&object2->memq)) {
6555 			page = (vm_page_t) queue_first(&object2->memq);
6558 		assert(queue_empty(&object2->memq));
6564 			vm_page_insert(page, object2, page->offset);
6572 	object1->field = object2->field;			\
6573 	object2->field = tmp_object->field;			\
6578 	assert(object1->vo_size == object2->vo_size);
6589 	assert(!object2->copy);
6592 	assert(!object2->shadow);
6602 	if (object2->pager_control != MEMORY_OBJECT_CONTROL_NULL) {
6603 		memory_object_control_collapse(object2->pager_control,
6604 					       object2);
6609 	assert(!object2->paging_in_progress);
6611 	assert(object2->activity_in_progress);
6624 	assert(object2->alive);
6627 	assert(object2->purgable == VM_PURGABLE_DENY);
6634 	assert(!object2->terminating);
6640 	object1->cached_list.next = (queue_entry_t) object2;
6641 	object2->cached_list.next = (queue_entry_t) object1;
6644 	assert(object2->cached_list.prev == NULL);
6647 	assert(queue_empty(&object2->msr_q));
6664 		hash_lck = vm_object_hash_lock_spin(object2->pager);
6665 		hash_entry = vm_object_hash_lookup(object2->pager, FALSE);
6667 		hash_entry->object = object2;
6670 	if (object2->hashed) {
6679 	object2->transposed = TRUE;
6685 	assert(object2->blocked_access);
6687 	assert(object2->__object2_unused_bits == 0);
6693 	assert(object2->objq.next == NULL);
6694 	assert(object2->objq.prev == NULL);
6720 		vm_object_unlock(object2);