*
* Copyright 2001-2003 Ximian, Inc
* Copyright 2003-2010 Novell, Inc.
+ * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+#include "config.h"
+#ifdef HAVE_SGEN_GC
+
+#include "metadata/sgen-gc.h"
+#include "metadata/sgen-cardtable.h"
+#include "metadata/sgen-memory-governor.h"
+#include "utils/mono-counters.h"
+#include "utils/mono-time.h"
+#include "utils/mono-memory-model.h"
+
#ifdef SGEN_HAVE_CARDTABLE
//#define CARDTABLE_STATS
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
+#endif
+#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
+#endif
#include <sys/types.h>
guint8 *sgen_cardtable;
long long marked_cards;
long long scanned_cards;
long long scanned_objects;
+long long remarked_cards;
static long long los_marked_cards;
static long long large_objects;
static long long last_major_scan_time;
static long long last_los_scan_time;
+
+static void sgen_card_tables_collect_stats (gboolean begin);
+
+
/*WARNING: This function returns the number of cards regardless of overflow in case of overlapping cards.*/
static mword
cards_in_range (mword address, mword size)
return (end >> CARD_BITS) - (address >> CARD_BITS) + 1;
}
+static void
+sgen_card_table_wbarrier_set_field (MonoObject *obj, gpointer field_ptr, MonoObject* value)
+{
+ *(void**)field_ptr = value;
+ if (sgen_ptr_in_nursery (value))
+ sgen_card_table_mark_address ((mword)field_ptr);
+ sgen_dummy_use (value);
+}
+
+static void
+sgen_card_table_wbarrier_set_arrayref (MonoArray *arr, gpointer slot_ptr, MonoObject* value)
+{
+ *(void**)slot_ptr = value;
+ if (sgen_ptr_in_nursery (value))
+ sgen_card_table_mark_address ((mword)slot_ptr);
+ sgen_dummy_use (value);
+}
+
+static void
+sgen_card_table_wbarrier_arrayref_copy (gpointer dest_ptr, gpointer src_ptr, int count)
+{
+ gpointer *dest = dest_ptr;
+ gpointer *src = src_ptr;
+
+ /*overlapping that required backward copying*/
+ if (src < dest && (src + count) > dest) {
+ gpointer *start = dest;
+ dest += count - 1;
+ src += count - 1;
+
+ for (; dest >= start; --src, --dest) {
+ gpointer value = *src;
+ *dest = value;
+ if (sgen_ptr_in_nursery (value))
+ sgen_card_table_mark_address ((mword)dest);
+ sgen_dummy_use (value);
+ }
+ } else {
+ gpointer *end = dest + count;
+ for (; dest < end; ++src, ++dest) {
+ gpointer value = *src;
+ *dest = value;
+ if (sgen_ptr_in_nursery (value))
+ sgen_card_table_mark_address ((mword)dest);
+ sgen_dummy_use (value);
+ }
+ }
+}
+
+static void
+sgen_card_table_wbarrier_value_copy (gpointer dest, gpointer src, int count, MonoClass *klass)
+{
+ size_t element_size = mono_class_value_size (klass, NULL);
+ size_t size = count * element_size;
+
+#ifdef DISABLE_CRITICAL_REGION
+ LOCK_GC;
+#else
+ TLAB_ACCESS_INIT;
+ ENTER_CRITICAL_REGION;
+#endif
+ mono_gc_memmove (dest, src, size);
+ sgen_card_table_mark_range ((mword)dest, size);
+#ifdef DISABLE_CRITICAL_REGION
+ UNLOCK_GC;
+#else
+ EXIT_CRITICAL_REGION;
+#endif
+}
+
+static void
+sgen_card_table_wbarrier_object_copy (MonoObject* obj, MonoObject *src)
+{
+ int size = mono_object_class (obj)->instance_size;
+
+#ifdef DISABLE_CRITICAL_REGION
+ LOCK_GC;
+#else
+ TLAB_ACCESS_INIT;
+ ENTER_CRITICAL_REGION;
+#endif
+ mono_gc_memmove ((char*)obj + sizeof (MonoObject), (char*)src + sizeof (MonoObject),
+ size - sizeof (MonoObject));
+ sgen_card_table_mark_range ((mword)obj, size);
+#ifdef DISABLE_CRITICAL_REGION
+ UNLOCK_GC;
+#else
+ EXIT_CRITICAL_REGION;
+#endif
+}
+
+static void
+sgen_card_table_wbarrier_generic_nostore (gpointer ptr)
+{
+ sgen_card_table_mark_address ((mword)ptr);
+}
+
#ifdef SGEN_HAVE_OVERLAPPING_CARDS
guint8 *sgen_shadow_cardtable;
return mask;
}
-static gboolean
-sgen_card_table_address_is_marked (mword address)
-{
- return *sgen_card_table_get_card_address (address) != 0;
-}
-
-void
-sgen_card_table_mark_address (mword address)
-{
- *sgen_card_table_get_card_address (address) = 1;
-}
-
void*
sgen_card_table_align_pointer (void *ptr)
{
void
sgen_card_table_mark_range (mword address, mword size)
{
- mword end = address + size;
- do {
- sgen_card_table_mark_address (address);
- address += CARD_SIZE_IN_BYTES;
- } while (address < end);
+ memset (sgen_card_table_get_card_address (address), 1, cards_in_range (address, size));
}
static gboolean
}
static void
-card_table_init (void)
+sgen_card_table_record_pointer (gpointer address)
{
- sgen_cardtable = mono_sgen_alloc_os_memory (CARD_COUNT_IN_BYTES, TRUE);
-
-#ifdef SGEN_HAVE_OVERLAPPING_CARDS
- sgen_shadow_cardtable = mono_sgen_alloc_os_memory (CARD_COUNT_IN_BYTES, TRUE);
-#endif
+ *sgen_card_table_get_card_address ((mword)address) = 1;
+}
-#ifdef HEAVY_STATISTICS
- mono_counters_register ("marked cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &marked_cards);
- mono_counters_register ("scanned cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &scanned_cards);
- mono_counters_register ("los marked cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_marked_cards);
- mono_counters_register ("los array cards scanned ", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_array_cards);
- mono_counters_register ("los array remsets", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_array_remsets);
- mono_counters_register ("cardtable scanned objects", MONO_COUNTER_GC | MONO_COUNTER_LONG, &scanned_objects);
- mono_counters_register ("cardtable large objects", MONO_COUNTER_GC | MONO_COUNTER_LONG, &large_objects);
- mono_counters_register ("cardtable bloby objects", MONO_COUNTER_GC | MONO_COUNTER_LONG, &bloby_objects);
-#endif
- mono_counters_register ("cardtable major scan time", MONO_COUNTER_GC | MONO_COUNTER_LONG, &major_card_scan_time);
- mono_counters_register ("cardtable los scan time", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_card_scan_time);
+static gboolean
+sgen_card_table_find_address (char *addr)
+{
+ return sgen_card_table_address_is_marked ((mword)addr);
}
#ifdef SGEN_HAVE_OVERLAPPING_CARDS
#endif
static void
-card_table_clear (void)
+sgen_card_table_prepare_for_major_collection (void)
{
/*XXX we could do this in 2 ways. using mincore or iterating over all sections/los objects */
- if (use_cardtable) {
- major_collector.iterate_live_block_ranges (clear_cards);
- mono_sgen_los_iterate_live_block_ranges (clear_cards);
- }
+ sgen_major_collector_iterate_live_block_ranges (clear_cards);
+ sgen_los_iterate_live_block_ranges (clear_cards);
}
+
static void
-scan_from_card_tables (void *start_nursery, void *end_nursery, GrayQueue *queue)
+sgen_card_table_finish_minor_collection (void)
{
- if (use_cardtable) {
- TV_DECLARE (atv);
- TV_DECLARE (btv);
+ sgen_card_tables_collect_stats (FALSE);
+}
+
+static void
+sgen_card_table_finish_scan_remsets (void *start_nursery, void *end_nursery, SgenGrayQueue *queue)
+{
+ SGEN_TV_DECLARE (atv);
+ SGEN_TV_DECLARE (btv);
+
+ sgen_card_tables_collect_stats (TRUE);
#ifdef SGEN_HAVE_OVERLAPPING_CARDS
/*FIXME we should have a bit on each block/los object telling if the object have marked cards.*/
/*First we copy*/
- major_collector.iterate_live_block_ranges (move_cards_to_shadow_table);
- mono_sgen_los_iterate_live_block_ranges (move_cards_to_shadow_table);
+ sgen_major_collector_iterate_live_block_ranges (move_cards_to_shadow_table);
+ sgen_los_iterate_live_block_ranges (move_cards_to_shadow_table);
/*Then we clear*/
- card_table_clear ();
+ sgen_card_table_prepare_for_major_collection ();
#endif
- TV_GETTIME (atv);
- major_collector.scan_card_table (queue);
- TV_GETTIME (btv);
- last_major_scan_time = TV_ELAPSED_MS (atv, btv);
- major_card_scan_time += last_major_scan_time;
- mono_sgen_los_scan_card_table (queue);
- TV_GETTIME (atv);
- last_los_scan_time = TV_ELAPSED_MS (btv, atv);
- los_card_scan_time += last_los_scan_time;
- }
+ SGEN_TV_GETTIME (atv);
+ sgen_major_collector_scan_card_table (queue);
+ SGEN_TV_GETTIME (btv);
+ last_major_scan_time = SGEN_TV_ELAPSED (atv, btv);
+ major_card_scan_time += last_major_scan_time;
+ sgen_los_scan_card_table (queue);
+ SGEN_TV_GETTIME (atv);
+ last_los_scan_time = SGEN_TV_ELAPSED (btv, atv);
+ los_card_scan_time += last_los_scan_time;
}
guint8*
mono_gc_get_card_table (int *shift_bits, gpointer *mask)
{
- if (!use_cardtable)
+ if (!sgen_cardtable)
return NULL;
- g_assert (sgen_cardtable);
*shift_bits = CARD_BITS;
#ifdef SGEN_HAVE_OVERLAPPING_CARDS
*mask = (gpointer)CARD_MASK;
printf ("TOTAL card pages %d faulted %d\n", CARD_PAGES, count);
}
+
+void
+sgen_card_table_dump_obj_card (char *object, size_t size, void *dummy)
+{
+ guint8 *start = sgen_card_table_get_card_scan_address (object);
+ guint8 *end = start + cards_in_range (object, size);
+ int cnt = 0;
+ printf ("--obj %p %d cards [%p %p]--", object, size, start, end);
+ for (; start < end; ++start) {
+ if (cnt == 0)
+ printf ("\n\t[%p] ", start);
+ printf ("%x ", *start);
+ ++cnt;
+ if (cnt == 8)
+ cnt = 0;
+ }
+ printf ("\n");
+}
#endif
#define MWORD_MASK (sizeof (mword) - 1)
#elif defined(__s390x__)
return (__builtin_ffsll (GUINT64_TO_LE(card)) - 1) / 8;
#else
- // FIXME:
- g_assert_not_reached ();
- /*
int i;
guint8 *ptr = (guint *) &card;
for (i = 0; i < sizeof (mword); ++i) {
if (ptr[i])
return i;
}
- */
return 0;
#endif
}
void
sgen_cardtable_scan_object (char *obj, mword block_obj_size, guint8 *cards, SgenGrayQueue *queue)
{
- MonoVTable *vt = (MonoVTable*)LOAD_VTABLE (obj);
+ MonoVTable *vt = (MonoVTable*)SGEN_LOAD_VTABLE (obj);
MonoClass *klass = vt->klass;
- CopyOrMarkObjectFunc copy_func = mono_sgen_get_copy_object ();
- ScanObjectFunc scan_object_func = mono_sgen_get_minor_scan_object ();
- ScanVTypeFunc scan_vtype_func = mono_sgen_get_minor_scan_vtype ();
HEAVY_STAT (++large_objects);
guint8 *card_data, *card_base;
guint8 *card_data_end;
char *obj_start = sgen_card_table_align_pointer (obj);
- mword obj_size = mono_sgen_par_object_get_size (vt, (MonoObject*)obj);
+ mword obj_size = sgen_par_object_get_size (vt, (MonoObject*)obj);
char *obj_end = obj + obj_size;
size_t card_count;
int extra_idx = 0;
elem = (char*)mono_array_addr_with_size ((MonoArray*)obj, elem_size, index);
if (klass->element_class->valuetype) {
+ ScanVTypeFunc scan_vtype_func = sgen_get_current_object_ops ()->scan_vtype;
+
for (; elem < card_end; elem += elem_size)
scan_vtype_func (elem, desc, queue);
} else {
+ CopyOrMarkObjectFunc copy_func = sgen_get_current_object_ops ()->copy_or_mark_object;
+
HEAVY_STAT (++los_array_cards);
for (; elem < card_end; elem += SIZEOF_VOID_P) {
gpointer new, old = *(gpointer*)elem;
- if (G_UNLIKELY (ptr_in_nursery (old))) {
+ if (G_UNLIKELY (sgen_ptr_in_nursery (old))) {
HEAVY_STAT (++los_array_remsets);
copy_func ((void**)elem, queue);
new = *(gpointer*)elem;
- if (G_UNLIKELY (ptr_in_nursery (new)))
- mono_sgen_add_to_global_remset (elem);
+ if (G_UNLIKELY (sgen_ptr_in_nursery (new)))
+ sgen_add_to_global_remset (elem);
}
}
}
HEAVY_STAT (++bloby_objects);
if (cards) {
if (sgen_card_table_is_range_marked (cards, (mword)obj, block_obj_size))
- scan_object_func (obj, queue);
+ sgen_get_current_object_ops ()->scan_object (obj, queue);
} else if (sgen_card_table_region_begin_scanning ((mword)obj, block_obj_size)) {
- scan_object_func (obj, queue);
+ sgen_get_current_object_ops ()->scan_object (obj, queue);
}
}
}
#endif
static void
-card_tables_collect_stats (gboolean begin)
+sgen_card_tables_collect_stats (gboolean begin)
{
#ifdef CARDTABLE_STATS
if (begin) {
memset (&major_stats, 0, sizeof (card_stats));
memset (&los_stats, 0, sizeof (card_stats));
cur_stats = &major_stats;
- major_collector.iterate_live_block_ranges (count_marked_cards);
+ sgen_major_collector_iterate_live_block_ranges (count_marked_cards);
cur_stats = &los_stats;
- mono_sgen_los_iterate_live_block_ranges (count_marked_cards);
+ sgen_los_iterate_live_block_ranges (count_marked_cards);
} else {
cur_stats = &major_stats;
- major_collector.iterate_live_block_ranges (count_marked_cards);
+ sgen_major_collector_iterate_live_block_ranges (count_marked_cards);
cur_stats = &los_stats;
- mono_sgen_los_iterate_live_block_ranges (count_remarked_cards);
- printf ("cards major (t %d m %d r %d) los (t %d m %d r %d) major_scan %lld los_scan %lld\n",
+ sgen_los_iterate_live_block_ranges (count_remarked_cards);
+ printf ("cards major (t %d m %d r %d) los (t %d m %d r %d) major_scan %.2fms los_scan %.2fms\n",
major_stats.total, major_stats.marked, major_stats.remarked,
los_stats.total, los_stats.marked, los_stats.remarked,
- last_major_scan_time, last_los_scan_time);
+ last_major_scan_time / 1000.0, last_los_scan_time / 1000.0);
}
#endif
}
+void
+sgen_card_table_init (SgenRemeberedSet *remset)
+{
+ sgen_cardtable = sgen_alloc_os_memory (CARD_COUNT_IN_BYTES, SGEN_ALLOC_INTERNAL | SGEN_ALLOC_ACTIVATE, "card table");
+
+#ifdef SGEN_HAVE_OVERLAPPING_CARDS
+ sgen_shadow_cardtable = sgen_alloc_os_memory (CARD_COUNT_IN_BYTES, SGEN_ALLOC_INTERNAL | SGEN_ALLOC_ACTIVATE, "shadow card table");
+#endif
+
+#ifdef HEAVY_STATISTICS
+ mono_counters_register ("marked cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &marked_cards);
+ mono_counters_register ("scanned cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &scanned_cards);
+ mono_counters_register ("remarked cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &remarked_cards);
+
+ mono_counters_register ("los marked cards", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_marked_cards);
+ mono_counters_register ("los array cards scanned ", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_array_cards);
+ mono_counters_register ("los array remsets", MONO_COUNTER_GC | MONO_COUNTER_LONG, &los_array_remsets);
+ mono_counters_register ("cardtable scanned objects", MONO_COUNTER_GC | MONO_COUNTER_LONG, &scanned_objects);
+ mono_counters_register ("cardtable large objects", MONO_COUNTER_GC | MONO_COUNTER_LONG, &large_objects);
+ mono_counters_register ("cardtable bloby objects", MONO_COUNTER_GC | MONO_COUNTER_LONG, &bloby_objects);
+#endif
+ mono_counters_register ("cardtable major scan time", MONO_COUNTER_GC | MONO_COUNTER_TIME_INTERVAL, &major_card_scan_time);
+ mono_counters_register ("cardtable los scan time", MONO_COUNTER_GC | MONO_COUNTER_TIME_INTERVAL, &los_card_scan_time);
+
+
+ remset->wbarrier_set_field = sgen_card_table_wbarrier_set_field;
+ remset->wbarrier_set_arrayref = sgen_card_table_wbarrier_set_arrayref;
+ remset->wbarrier_arrayref_copy = sgen_card_table_wbarrier_arrayref_copy;
+ remset->wbarrier_value_copy = sgen_card_table_wbarrier_value_copy;
+ remset->wbarrier_object_copy = sgen_card_table_wbarrier_object_copy;
+ remset->wbarrier_generic_nostore = sgen_card_table_wbarrier_generic_nostore;
+ remset->record_pointer = sgen_card_table_record_pointer;
+
+ remset->finish_scan_remsets = sgen_card_table_finish_scan_remsets;
+
+ remset->finish_minor_collection = sgen_card_table_finish_minor_collection;
+ remset->prepare_for_major_collection = sgen_card_table_prepare_for_major_collection;
+
+ remset->find_address = sgen_card_table_find_address;
+}
+
#else
void
g_assert_not_reached ();
}
-#define sgen_card_table_address_is_marked(p) FALSE
-#define scan_from_card_tables(start,end,queue)
-#define card_table_clear()
-#define card_table_init()
-#define card_tables_collect_stats(begin)
-
guint8*
mono_gc_get_card_table (int *shift_bits, gpointer *mask)
{
}
#endif
+
+#endif /*HAVE_SGEN_GC*/