2 * sgen-copy-object.h: This is where objects are copied.
4 * Copyright 2001-2003 Ximian, Inc
5 * Copyright 2003-2010 Novell, Inc.
6 * Copyright (C) 2012 Xamarin Inc
8 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
11 extern guint64 stat_copy_object_called_nursery;
12 extern guint64 stat_objects_copied_nursery;
14 extern guint64 stat_nursery_copy_object_failed_from_space;
15 extern guint64 stat_nursery_copy_object_failed_forwarded;
16 extern guint64 stat_nursery_copy_object_failed_pinned;
18 extern guint64 stat_slots_allocated_in_vain;
21 * Copies an object and enqueues it if a queue is given.
23 * This function can be used even if the vtable of obj is not valid
24 * anymore, which is the case in the parallel collector.
26 static MONO_ALWAYS_INLINE void
27 par_copy_object_no_checks (char *destination, GCVTable vt, void *obj, mword objsize, SgenGrayQueue *queue)
29 sgen_client_pre_copy_checks (destination, vt, obj, objsize);
30 binary_protocol_copy (obj, destination, vt, objsize);
32 /* FIXME: assumes object layout */
33 memcpy ((char*)destination + sizeof (mword), (char*)obj + sizeof (mword), objsize - sizeof (mword));
35 /* adjust array->bounds */
36 SGEN_ASSERT (9, sgen_vtable_get_descriptor (vt), "vtable %p has no gc descriptor", vt);
38 sgen_client_update_copied_object (destination, vt, obj, objsize);
41 SGEN_LOG (9, "Enqueuing gray object %p (%s)", obj, sgen_client_vtable_get_name (vt));
42 GRAY_OBJECT_ENQUEUE (queue, (GCObject *)obj, sgen_vtable_get_descriptor (vt));
47 * This can return OBJ itself on OOM.
49 static MONO_NEVER_INLINE GCObject *
50 copy_object_no_checks (GCObject *obj, SgenGrayQueue *queue)
52 GCVTable vt = SGEN_LOAD_VTABLE_UNCHECKED (obj);
53 gboolean has_references = SGEN_VTABLE_HAS_REFERENCES (vt);
54 mword objsize = SGEN_ALIGN_UP (sgen_client_par_object_get_size (vt, obj));
55 /* FIXME: Does this not mark the newly allocated object? */
56 void *destination = COLLECTOR_SERIAL_ALLOC_FOR_PROMOTION (vt, obj, objsize, has_references);
58 if (G_UNLIKELY (!destination)) {
59 /* FIXME: Is this path ever tested? */
60 collector_pin_object (obj, queue);
61 sgen_set_pinned_from_failed_allocation (objsize);
68 par_copy_object_no_checks ((char *)destination, vt, obj, objsize, queue);
69 /* FIXME: mark mod union cards if necessary */
71 /* set the forwarding pointer */
72 SGEN_FORWARD_OBJECT (obj, destination);
74 return (GCObject *)destination;