/*
+ * sgen-major-copy-object.h: Object copying in the major collectors.
+ *
* Copyright 2001-2003 Ximian, Inc
* Copyright 2003-2010 Novell, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-extern long long stat_copy_object_called_nursery;
-extern long long stat_objects_copied_nursery;
-
-extern long long stat_nursery_copy_object_failed_from_space;
-extern long long stat_nursery_copy_object_failed_forwarded;
-extern long long stat_nursery_copy_object_failed_pinned;
-
-/*
- * This function can be used even if the vtable of obj is not valid
- * anymore, which is the case in the parallel collector.
- */
-static void
-par_copy_object_no_checks (char *destination, MonoVTable *vt, void *obj, mword objsize, SgenGrayQueue *queue)
-{
- static const void *copy_labels [] = { &&LAB_0, &&LAB_1, &&LAB_2, &&LAB_3, &&LAB_4, &&LAB_5, &&LAB_6, &&LAB_7, &&LAB_8 };
-
- DEBUG (9, g_assert (vt->klass->inited));
- DEBUG (9, fprintf (gc_debug_file, " (to %p, %s size: %lu)\n", destination, ((MonoObject*)obj)->vtable->klass->name, (unsigned long)objsize));
- binary_protocol_copy (obj, destination, vt, objsize);
-
- *(MonoVTable**)destination = vt;
- if (objsize <= sizeof (gpointer) * 8) {
- mword *dest = (mword*)destination;
- goto *copy_labels [objsize / sizeof (gpointer)];
- LAB_8:
- (dest) [7] = ((mword*)obj) [7];
- LAB_7:
- (dest) [6] = ((mword*)obj) [6];
- LAB_6:
- (dest) [5] = ((mword*)obj) [5];
- LAB_5:
- (dest) [4] = ((mword*)obj) [4];
- LAB_4:
- (dest) [3] = ((mword*)obj) [3];
- LAB_3:
- (dest) [2] = ((mword*)obj) [2];
- LAB_2:
- (dest) [1] = ((mword*)obj) [1];
- LAB_1:
- ;
- LAB_0:
- ;
- } else {
- memcpy (destination + sizeof (mword), (char*)obj + sizeof (mword), objsize - sizeof (mword));
- }
- /* adjust array->bounds */
- DEBUG (9, g_assert (vt->gc_descr));
- if (G_UNLIKELY (vt->rank && ((MonoArray*)obj)->bounds)) {
- MonoArray *array = (MonoArray*)destination;
- array->bounds = (MonoArrayBounds*)((char*)destination + ((char*)((MonoArray*)obj)->bounds - (char*)obj));
- DEBUG (9, fprintf (gc_debug_file, "Array instance %p: size: %lu, rank: %d, length: %lu\n", array, (unsigned long)objsize, vt->rank, (unsigned long)mono_array_length (array)));
- }
- if (G_UNLIKELY (mono_profiler_events & MONO_PROFILE_GC_MOVES))
- mono_sgen_register_moved_object (obj, destination);
- obj = destination;
- if (queue) {
- DEBUG (9, fprintf (gc_debug_file, "Enqueuing gray object %p (%s)\n", obj, mono_sgen_safe_name (obj)));
- GRAY_OBJECT_ENQUEUE (queue, obj);
- }
-}
-
-static void*
-copy_object_no_checks (void *obj, SgenGrayQueue *queue)
-{
- MonoVTable *vt = ((MonoObject*)obj)->vtable;
- gboolean has_references = SGEN_VTABLE_HAS_REFERENCES (vt);
- mword objsize = SGEN_ALIGN_UP (mono_sgen_par_object_get_size (vt, (MonoObject*)obj));
- char *destination = major_alloc_object (objsize, has_references);
-
- if (G_UNLIKELY (!destination)) {
- mono_sgen_pin_object (obj, queue);
- return obj;
- }
-
- par_copy_object_no_checks (destination, vt, obj, objsize, has_references ? queue : NULL);
-
- /* set the forwarding pointer */
- SGEN_FORWARD_OBJECT (obj, destination);
-
- return destination;
-}
-
-/*
- * This is how the copying happens from the nursery to the old generation.
- * We assume that at this time all the pinned objects have been identified and
- * marked as such.
- * We run scan_object() for each pinned object so that each referenced
- * objects if possible are copied. The new gray objects created can have
- * scan_object() run on them right away, too.
- * Then we run copy_object() for the precisely tracked roots. At this point
- * all the roots are either gray or black. We run scan_object() on the gray
- * objects until no more gray objects are created.
- * At the end of the process we walk again the pinned list and we unmark
- * the pinned flag. As we go we also create the list of free space for use
- * in the next allocation runs.
+ * Copyright (C) 2012 Xamarin Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License 2.0 as published by the Free Software Foundation;
*
- * We need to remember objects from the old generation that point to the new one
- * (or just addresses?).
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
*
- * copy_object could be made into a macro once debugged (use inline for now).
+ * You should have received a copy of the GNU Library General Public
+ * License 2.0 along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-static void
-copy_object (void **obj_slot, SgenGrayQueue *queue)
-{
- char *forwarded;
- char *obj = *obj_slot;
-
- DEBUG (9, g_assert (current_collection_generation == GENERATION_NURSERY));
-
- HEAVY_STAT (++stat_copy_object_called_nursery);
-
- if (!ptr_in_nursery (obj)) {
- HEAVY_STAT (++stat_nursery_copy_object_failed_from_space);
- return;
- }
-
- DEBUG (9, fprintf (gc_debug_file, "Precise copy of %p from %p", obj, obj_slot));
-
- /*
- * Before we can copy the object we must make sure that we are
- * allowed to, i.e. that the object not pinned or not already
- * forwarded.
- */
-
- if ((forwarded = SGEN_OBJECT_IS_FORWARDED (obj))) {
- DEBUG (9, g_assert (((MonoVTable*)SGEN_LOAD_VTABLE(obj))->gc_descr));
- DEBUG (9, fprintf (gc_debug_file, " (already forwarded to %p)\n", forwarded));
- HEAVY_STAT (++stat_nursery_copy_object_failed_forwarded);
- *obj_slot = forwarded;
- return;
- }
- if (SGEN_OBJECT_IS_PINNED (obj)) {
- DEBUG (9, g_assert (((MonoVTable*)SGEN_LOAD_VTABLE(obj))->gc_descr));
- DEBUG (9, fprintf (gc_debug_file, " (pinned, no change)\n"));
- HEAVY_STAT (++stat_nursery_copy_object_failed_pinned);
- return;
- }
+#define collector_pin_object(obj, queue) do { \
+ if (sgen_ptr_in_nursery (obj)) { \
+ sgen_pin_object (obj, queue); \
+ } else { \
+ g_assert (objsize <= SGEN_MAX_SMALL_OBJ_SIZE); \
+ pin_major_object (obj, queue); \
+ } \
+} while (0)
- HEAVY_STAT (++stat_objects_copied_nursery);
+#define COLLECTOR_SERIAL_ALLOC_FOR_PROMOTION sgen_minor_collector.alloc_for_promotion
+#define COLLECTOR_PARALLEL_ALLOC_FOR_PROMOTION sgen_minor_collector.par_alloc_for_promotion
- *obj_slot = copy_object_no_checks (obj, queue);
-}
-#define FILL_COLLECTOR_COPY_OBJECT(collector) do { \
- (collector)->copy_object = copy_object; \
- } while (0)
+#include "sgen-copy-object.h"
projects / mono.git / blobdiff