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 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License 2.0 as published by the Free Software Foundation;
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License 2.0 along with this library; if not, write to the Free
19 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 extern guint64 stat_copy_object_called_nursery;
23 extern guint64 stat_objects_copied_nursery;
25 extern guint64 stat_nursery_copy_object_failed_from_space;
26 extern guint64 stat_nursery_copy_object_failed_forwarded;
27 extern guint64 stat_nursery_copy_object_failed_pinned;
29 extern guint64 stat_slots_allocated_in_vain;
32 * Copies an object and enqueues it if a queue is given.
34 * This function can be used even if the vtable of obj is not valid
35 * anymore, which is the case in the parallel collector.
37 static MONO_ALWAYS_INLINE void
38 par_copy_object_no_checks (char *destination, GCVTable vt, void *obj, mword objsize, SgenGrayQueue *queue)
40 sgen_client_pre_copy_checks (destination, vt, obj, objsize);
41 binary_protocol_copy (obj, destination, vt, objsize);
43 /* FIXME: assumes object layout */
44 memcpy ((char*)destination + sizeof (mword), (char*)obj + sizeof (mword), objsize - sizeof (mword));
46 /* adjust array->bounds */
47 SGEN_ASSERT (9, sgen_vtable_get_descriptor (vt), "vtable %p has no gc descriptor", vt);
49 sgen_client_update_copied_object (destination, vt, obj, objsize);
52 SGEN_LOG (9, "Enqueuing gray object %p (%s)", obj, sgen_client_vtable_get_name (vt));
53 GRAY_OBJECT_ENQUEUE (queue, (GCObject *)obj, sgen_vtable_get_descriptor (vt));
58 * This can return OBJ itself on OOM.
60 static MONO_NEVER_INLINE GCObject *
61 copy_object_no_checks (GCObject *obj, SgenGrayQueue *queue)
63 GCVTable vt = SGEN_LOAD_VTABLE_UNCHECKED (obj);
64 gboolean has_references = SGEN_VTABLE_HAS_REFERENCES (vt);
65 mword objsize = SGEN_ALIGN_UP (sgen_client_par_object_get_size (vt, obj));
66 /* FIXME: Does this not mark the newly allocated object? */
67 void *destination = COLLECTOR_SERIAL_ALLOC_FOR_PROMOTION (vt, obj, objsize, has_references);
69 if (G_UNLIKELY (!destination)) {
70 /* FIXME: Is this path ever tested? */
71 collector_pin_object (obj, queue);
72 sgen_set_pinned_from_failed_allocation (objsize);
79 par_copy_object_no_checks ((char *)destination, vt, obj, objsize, queue);
80 /* FIXME: mark mod union cards if necessary */
82 /* set the forwarding pointer */
83 SGEN_FORWARD_OBJECT (obj, destination);
85 return (GCObject *)destination;