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);
44 if (G_UNLIKELY (MONO_GC_OBJ_MOVED_ENABLED ())) {
45 int dest_gen = sgen_ptr_in_nursery (destination) ? GENERATION_NURSERY : GENERATION_OLD;
46 int src_gen = sgen_ptr_in_nursery (obj) ? GENERATION_NURSERY : GENERATION_OLD;
47 MONO_GC_OBJ_MOVED ((mword)destination, (mword)obj, dest_gen, src_gen, objsize, sgen_client_vtable_get_namespace (vt), sgen_client_vtable_get_name (vt));
51 /* FIXME: assumes object layout */
52 memcpy (destination + sizeof (mword), (char*)obj + sizeof (mword), objsize - sizeof (mword));
54 /* adjust array->bounds */
55 SGEN_ASSERT (9, sgen_vtable_get_descriptor (vt), "vtable %p has no gc descriptor", vt);
57 sgen_client_update_copied_object (destination, vt, obj, objsize);
58 if (G_UNLIKELY (mono_profiler_events & MONO_PROFILE_GC_MOVES))
59 sgen_register_moved_object (obj, destination);
62 SGEN_LOG (9, "Enqueuing gray object %p (%s)", obj, sgen_client_object_safe_name (obj));
63 GRAY_OBJECT_ENQUEUE (queue, obj, sgen_vtable_get_descriptor (vt));
68 * This can return OBJ itself on OOM.
70 static MONO_NEVER_INLINE void*
71 copy_object_no_checks (void *obj, SgenGrayQueue *queue)
73 GCVTable *vt = SGEN_LOAD_VTABLE_UNCHECKED (obj);
74 gboolean has_references = SGEN_VTABLE_HAS_REFERENCES (vt);
75 mword objsize = SGEN_ALIGN_UP (sgen_client_par_object_get_size (vt, obj));
76 /* FIXME: Does this not mark the newly allocated object? */
77 char *destination = COLLECTOR_SERIAL_ALLOC_FOR_PROMOTION (vt, obj, objsize, has_references);
79 if (G_UNLIKELY (!destination)) {
80 /* FIXME: Is this path ever tested? */
81 collector_pin_object (obj, queue);
82 sgen_set_pinned_from_failed_allocation (objsize);
89 par_copy_object_no_checks (destination, vt, obj, objsize, queue);
90 /* FIXME: mark mod union cards if necessary */
92 /* set the forwarding pointer */
93 SGEN_FORWARD_OBJECT (obj, destination);