* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+#include "config.h"
+
#ifdef HAVE_SGEN_GC
#include <math.h>
#include "metadata/sgen-gc.h"
#include "metadata/sgen-protocol.h"
#include "metadata/sgen-cardtable.h"
+#include "metadata/sgen-memory-governor.h"
#include "metadata/gc-internal.h"
#define MS_BLOCK_SIZE (16*1024)
};
#ifdef FIXED_HEAP
-static int ms_heap_num_blocks = MS_DEFAULT_HEAP_NUM_BLOCKS;
+static mword ms_heap_num_blocks = MS_DEFAULT_HEAP_NUM_BLOCKS;
-#define ms_heap_start nursery_end
+static char *ms_heap_start;
static char *ms_heap_end;
#define MS_PTR_IN_SMALL_MAJOR_HEAP(p) ((char*)(p) >= ms_heap_start && (char*)(p) < ms_heap_end)
#ifdef SGEN_PARALLEL_MARK
static LOCK_DECLARE (ms_block_list_mutex);
-#define LOCK_MS_BLOCK_LIST pthread_mutex_lock (&ms_block_list_mutex)
-#define UNLOCK_MS_BLOCK_LIST pthread_mutex_unlock (&ms_block_list_mutex)
-#else
-#define LOCK_MS_BLOCK_LIST
-#define UNLOCK_MS_BLOCK_LIST
+#define LOCK_MS_BLOCK_LIST mono_mutex_lock (&ms_block_list_mutex)
+#define UNLOCK_MS_BLOCK_LIST mono_mutex_unlock (&ms_block_list_mutex)
#endif
-/* we get this at init */
-static int nursery_bits;
-static char *nursery_start;
-static char *nursery_end;
-
static gboolean *evacuate_block_obj_sizes;
static float evacuation_threshold = 0.666;
static gboolean concurrent_sweep = FALSE;
static gboolean have_swept;
-#define ptr_in_nursery(p) (SGEN_PTR_IN_NURSERY ((p), nursery_bits, nursery_start, nursery_end))
-
/* all allocated blocks in the system */
static MSBlockInfo *all_blocks;
/* one free block list for each block object size */
static MSBlockInfo **free_block_lists [MS_BLOCK_TYPE_MAX];
+#ifdef SGEN_PARALLEL_MARK
+#ifdef HAVE_KW_THREAD
+static __thread MSBlockInfo ***workers_free_block_lists;
+#else
+static MonoNativeTlsKey workers_free_block_lists_key;
+#endif
+#endif
+
static long long stat_major_blocks_alloced = 0;
static long long stat_major_blocks_freed = 0;
static long long stat_major_objects_evacuated = 0;
static long long stat_time_wait_for_sweep = 0;
static gboolean ms_sweep_in_progress = FALSE;
-static pthread_t ms_sweep_thread;
+static MonoNativeThreadId ms_sweep_thread;
static MonoSemType ms_sweep_cmd_semaphore;
static MonoSemType ms_sweep_done_semaphore;
g_error ("MONO_SEM_WAIT");
}
SGEN_TV_GETTIME (btv);
- stat_time_wait_for_sweep += SGEN_TV_ELAPSED_MS (atv, btv);
+ stat_time_wait_for_sweep += SGEN_TV_ELAPSED (atv, btv);
g_assert (ms_sweep_in_progress);
ms_sweep_in_progress = FALSE;
for (i = 0; i < num_block_obj_sizes; ++i)
if (block_obj_sizes [i] >= size)
return i;
- g_assert_not_reached ();
+ g_error ("no object of size %d\n", size);
}
-#define FREE_BLOCKS(p,r) (free_block_lists [((p) ? MS_BLOCK_FLAG_PINNED : 0) | ((r) ? MS_BLOCK_FLAG_REFS : 0)])
+#define FREE_BLOCKS_FROM(lists,p,r) (lists [((p) ? MS_BLOCK_FLAG_PINNED : 0) | ((r) ? MS_BLOCK_FLAG_REFS : 0)])
+#define FREE_BLOCKS(p,r) (FREE_BLOCKS_FROM (free_block_lists, (p), (r)))
+#ifdef SGEN_PARALLEL_MARK
+#ifdef HAVE_KW_THREAD
+#define FREE_BLOCKS_LOCAL(p,r) (FREE_BLOCKS_FROM (workers_free_block_lists, (p), (r)))
+#else
+#define FREE_BLOCKS_LOCAL(p,r) (FREE_BLOCKS_FROM (((MSBlockInfo***)(mono_native_tls_get_value (workers_free_block_lists_key))), (p), (r)))
+#endif
+#else
+//#define FREE_BLOCKS_LOCAL(p,r) (FREE_BLOCKS_FROM (free_block_lists, (p), (r)))
+#endif
#define MS_BLOCK_OBJ_SIZE_INDEX(s) \
(((s)+7)>>3 < MS_NUM_FAST_BLOCK_OBJ_SIZE_INDEXES ? \
static void*
major_alloc_heap (mword nursery_size, mword nursery_align, int the_nursery_bits)
{
- char *heap_start;
+ char *nursery_start;
mword major_heap_size = ms_heap_num_blocks * MS_BLOCK_SIZE;
mword alloc_size = nursery_size + major_heap_size;
- int i;
+ mword i;
g_assert (ms_heap_num_blocks > 0);
g_assert (nursery_size % MS_BLOCK_SIZE == 0);
if (nursery_align)
g_assert (nursery_align % MS_BLOCK_SIZE == 0);
- nursery_start = mono_sgen_alloc_os_memory_aligned (alloc_size, nursery_align ? nursery_align : MS_BLOCK_SIZE, TRUE);
- nursery_end = heap_start = nursery_start + nursery_size;
- nursery_bits = the_nursery_bits;
-
- ms_heap_end = heap_start + major_heap_size;
+ nursery_start = sgen_alloc_os_memory_aligned (alloc_size, nursery_align ? nursery_align : MS_BLOCK_SIZE, TRUE, TRUE, "heap");
+ ms_heap_start = nursery_start + nursery_size;
+ ms_heap_end = ms_heap_start + major_heap_size;
- block_infos = mono_sgen_alloc_internal_dynamic (sizeof (MSBlockInfo) * ms_heap_num_blocks, INTERNAL_MEM_MS_BLOCK_INFO);
+ block_infos = sgen_alloc_internal_dynamic (sizeof (MSBlockInfo) * ms_heap_num_blocks, INTERNAL_MEM_MS_BLOCK_INFO, TRUE);
for (i = 0; i < ms_heap_num_blocks; ++i) {
- block_infos [i].block = heap_start + i * MS_BLOCK_SIZE;
+ block_infos [i].block = ms_heap_start + i * MS_BLOCK_SIZE;
if (i < ms_heap_num_blocks - 1)
block_infos [i].next_free = &block_infos [i + 1];
else
static void*
major_alloc_heap (mword nursery_size, mword nursery_align, int the_nursery_bits)
{
+ char *start;
if (nursery_align)
- nursery_start = mono_sgen_alloc_os_memory_aligned (nursery_size, nursery_align, TRUE);
+ start = sgen_alloc_os_memory_aligned (nursery_size, nursery_align, TRUE, TRUE, "nursery");
else
- nursery_start = mono_sgen_alloc_os_memory (nursery_size, TRUE);
+ start = sgen_alloc_os_memory (nursery_size, TRUE, TRUE, "nursery");
- nursery_end = nursery_start + nursery_size;
- nursery_bits = the_nursery_bits;
-
- return nursery_start;
+ return start;
}
#endif
static void
update_heap_boundaries_for_block (MSBlockInfo *block)
{
- mono_sgen_update_heap_boundaries ((mword)block->block, (mword)block->block + MS_BLOCK_SIZE);
+ sgen_update_heap_boundaries ((mword)block->block, (mword)block->block + MS_BLOCK_SIZE);
}
#ifdef FIXED_HEAP
g_assert (empty_blocks);
- block = empty_blocks;
- empty_blocks = empty_blocks->next_free;
+ do {
+ block = empty_blocks;
+ } while (SGEN_CAS_PTR ((gpointer*)&empty_blocks, block->next_free, block) != block);
block->used = TRUE;
empty_blocks = block;
block->used = FALSE;
block->zeroed = FALSE;
- mono_sgen_release_space (MS_BLOCK_SIZE, SPACE_MAJOR);
+ sgen_memgov_release_space (MS_BLOCK_SIZE, SPACE_MAJOR);
}
#else
static void*
retry:
if (!empty_blocks) {
- p = mono_sgen_alloc_os_memory_aligned (MS_BLOCK_SIZE * MS_BLOCK_ALLOC_NUM, MS_BLOCK_SIZE, TRUE);
+ p = sgen_alloc_os_memory_aligned (MS_BLOCK_SIZE * MS_BLOCK_ALLOC_NUM, MS_BLOCK_SIZE, TRUE, TRUE, "major heap section");
for (i = 0; i < MS_BLOCK_ALLOC_NUM; ++i) {
block = p;
do {
empty = empty_blocks;
*(void**)block = empty;
- } while (SGEN_CAS_PTR (&empty_blocks, block, empty) != empty);
+ } while (SGEN_CAS_PTR ((gpointer*)&empty_blocks, block, empty) != empty);
p += MS_BLOCK_SIZE;
}
{
void *empty;
- mono_sgen_release_space (MS_BLOCK_SIZE, SPACE_MAJOR);
+ sgen_memgov_release_space (MS_BLOCK_SIZE, SPACE_MAJOR);
memset (block, 0, MS_BLOCK_SIZE);
do {
int size = block_obj_sizes [size_index];
int count = MS_BLOCK_FREE / size;
MSBlockInfo *info;
+#ifdef SGEN_PARALLEL_MARK
+ MSBlockInfo *next;
+#endif
#ifndef FIXED_HEAP
MSBlockHeader *header;
#endif
char *obj_start;
int i;
- if (!mono_sgen_try_alloc_space (MS_BLOCK_SIZE, SPACE_MAJOR))
+ if (!sgen_memgov_try_alloc_space (MS_BLOCK_SIZE, SPACE_MAJOR))
return FALSE;
#ifdef FIXED_HEAP
info = ms_get_empty_block ();
#else
- info = mono_sgen_alloc_internal (INTERNAL_MEM_MS_BLOCK_INFO);
+ info = sgen_alloc_internal (INTERNAL_MEM_MS_BLOCK_INFO);
#endif
DEBUG (9, g_assert (count >= 2));
info->pinned = pinned;
info->has_references = has_references;
info->has_pinned = pinned;
- info->is_to_space = (mono_sgen_get_current_collection_generation () == GENERATION_OLD);
+ info->is_to_space = (sgen_get_current_collection_generation () == GENERATION_OLD); /*FIXME WHY??? */
#ifndef FIXED_HEAP
info->block = ms_get_empty_block ();
/* the last one */
*(void**)obj_start = NULL;
+#ifdef SGEN_PARALLEL_MARK
+ do {
+ next = info->next_free = free_blocks [size_index];
+ } while (SGEN_CAS_PTR ((void**)&free_blocks [size_index], info, next) != next);
+
+ do {
+ next = info->next = all_blocks;
+ } while (SGEN_CAS_PTR ((void**)&all_blocks, info, next) != next);
+#else
info->next_free = free_blocks [size_index];
free_blocks [size_index] = info;
info->next = all_blocks;
all_blocks = info;
+#endif
++num_major_sections;
return TRUE;
}
static gboolean
-obj_is_from_pinned_alloc (char *obj)
+obj_is_from_pinned_alloc (char *ptr)
{
- MSBlockInfo *block = MS_BLOCK_FOR_OBJ (obj);
- return block->pinned;
+ MSBlockInfo *block;
+
+ FOREACH_BLOCK (block) {
+ if (ptr >= block->block && ptr <= block->block + MS_BLOCK_SIZE)
+ return block->pinned;
+ } END_FOREACH_BLOCK;
+ return FALSE;
}
static void*
-alloc_obj (int size, gboolean pinned, gboolean has_references)
+unlink_slot_from_free_list_uncontested (MSBlockInfo **free_blocks, int size_index)
{
- int size_index = MS_BLOCK_OBJ_SIZE_INDEX (size);
- MSBlockInfo **free_blocks = FREE_BLOCKS (pinned, has_references);
MSBlockInfo *block;
void *obj;
- /* FIXME: try to do this without locking */
-
- LOCK_MS_BLOCK_LIST;
-
- g_assert (!ms_sweep_in_progress);
-
- if (!free_blocks [size_index]) {
- if (G_UNLIKELY (!ms_alloc_block (size_index, pinned, has_references))) {
- UNLOCK_MS_BLOCK_LIST;
- return NULL;
- }
- }
-
block = free_blocks [size_index];
DEBUG (9, g_assert (block));
block->next_free = NULL;
}
- UNLOCK_MS_BLOCK_LIST;
+ return obj;
+}
+
+#ifdef SGEN_PARALLEL_MARK
+static gboolean
+try_remove_block_from_free_list (MSBlockInfo *block, MSBlockInfo **free_blocks, int size_index)
+{
+ /*
+ * No more free slots in the block, so try to free the block.
+ * Don't try again if we don't succeed - another thread will
+ * already have done it.
+ */
+ MSBlockInfo *next_block = block->next_free;
+ if (SGEN_CAS_PTR ((void**)&free_blocks [size_index], next_block, block) == block) {
+ /*
+ void *old = SGEN_CAS_PTR ((void**)&block->next_free, NULL, next_block);
+ g_assert (old == next_block);
+ */
+ block->next_free = NULL;
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static void*
+alloc_obj_par (int size, gboolean pinned, gboolean has_references)
+{
+ int size_index = MS_BLOCK_OBJ_SIZE_INDEX (size);
+ MSBlockInfo **free_blocks_local = FREE_BLOCKS_LOCAL (pinned, has_references);
+ MSBlockInfo *block;
+ void *obj;
+
+ DEBUG (9, g_assert (!ms_sweep_in_progress));
+ DEBUG (9, g_assert (current_collection_generation == GENERATION_OLD));
+
+ if (free_blocks_local [size_index]) {
+ get_slot:
+ obj = unlink_slot_from_free_list_uncontested (free_blocks_local, size_index);
+ } else {
+ MSBlockInfo **free_blocks = FREE_BLOCKS (pinned, has_references);
+
+ get_block:
+ block = free_blocks [size_index];
+ if (block) {
+ if (!try_remove_block_from_free_list (block, free_blocks, size_index))
+ goto get_block;
+
+ g_assert (block->next_free == NULL);
+ g_assert (block->free_list);
+ block->next_free = free_blocks_local [size_index];
+ free_blocks_local [size_index] = block;
+
+ goto get_slot;
+ } else {
+ gboolean success;
+
+ LOCK_MS_BLOCK_LIST;
+ success = ms_alloc_block (size_index, pinned, has_references);
+ UNLOCK_MS_BLOCK_LIST;
+
+ if (G_UNLIKELY (!success))
+ return NULL;
+
+ goto get_block;
+ }
+ }
+
+ /*
+ * FIXME: This should not be necessary because it'll be
+ * overwritten by the vtable immediately.
+ */
+ *(void**)obj = NULL;
+
+ return obj;
+}
+
+static void*
+major_par_alloc_object (int size, gboolean has_references)
+{
+ return alloc_obj_par (size, FALSE, has_references);
+}
+#endif
+
+static void*
+alloc_obj (int size, gboolean pinned, gboolean has_references)
+{
+ int size_index = MS_BLOCK_OBJ_SIZE_INDEX (size);
+ MSBlockInfo **free_blocks = FREE_BLOCKS (pinned, has_references);
+ void *obj;
+
+#ifdef SGEN_PARALLEL_MARK
+ DEBUG (9, g_assert (current_collection_generation != GENERATION_OLD));
+#endif
+
+ DEBUG (9, g_assert (!ms_sweep_in_progress));
+
+ if (!free_blocks [size_index]) {
+ if (G_UNLIKELY (!ms_alloc_block (size_index, pinned, has_references)))
+ return NULL;
+ }
+
+ obj = unlink_slot_from_free_list_uncontested (free_blocks, size_index);
/*
* FIXME: This should not be necessary because it'll be
*as pinned alloc is requested by the runtime.
*/
if (!res) {
- sgen_collect_major_no_lock ("pinned alloc failure");
- res = alloc_obj (size, TRUE, has_references);
+ sgen_perform_collection (0, GENERATION_OLD, "pinned alloc failure");
+ res = alloc_obj (size, TRUE, has_references);
}
return res;
}
HEAVY_STAT (++stat_objects_alloced_degraded);
HEAVY_STAT (stat_bytes_alloced_degraded += size);
g_assert (num_major_sections >= old_num_sections);
- mono_sgen_register_major_sections_alloced (num_major_sections - old_num_sections);
+ sgen_register_major_sections_alloced (num_major_sections - old_num_sections);
}
return obj;
}
mword objsize;
#endif
- if (ptr_in_nursery (obj))
+ if (sgen_ptr_in_nursery (obj))
return FALSE;
#ifdef FIXED_HEAP
if (!MS_PTR_IN_SMALL_MAJOR_HEAP (obj))
return FALSE;
#else
- objsize = SGEN_ALIGN_UP (mono_sgen_safe_object_get_size ((MonoObject*)obj));
+ objsize = SGEN_ALIGN_UP (sgen_safe_object_get_size ((MonoObject*)obj));
/* LOS */
if (objsize > SGEN_MAX_SMALL_OBJ_SIZE)
MSBlockInfo *block;
FOREACH_BLOCK (block) {
- if (ptr >= (char*)block && ptr <= (char*)block + MS_BLOCK_SIZE)
- return TRUE;
+ if (ptr >= block->block && ptr <= block->block + MS_BLOCK_SIZE)
+ return !block->pinned;
} END_FOREACH_BLOCK;
return FALSE;
}
} END_FOREACH_BLOCK;
}
+static gboolean
+major_is_valid_object (char *object)
+{
+ MSBlockInfo *block;
+
+ ms_wait_for_sweep_done ();
+ FOREACH_BLOCK (block) {
+ int idx;
+ char *obj;
+
+ if ((block->block > object) || ((block->block + MS_BLOCK_SIZE) <= object))
+ continue;
+
+ idx = MS_BLOCK_OBJ_INDEX (object, block);
+ obj = (char*)MS_BLOCK_OBJ (block, idx);
+ if (obj != object)
+ return FALSE;
+ return MS_OBJ_ALLOCED (obj, block);
+ } END_FOREACH_BLOCK;
+
+ return FALSE;
+}
+
+
+static gboolean
+major_describe_pointer (char *ptr)
+{
+ MSBlockInfo *block;
+
+ FOREACH_BLOCK (block) {
+ int idx;
+ char *obj;
+ gboolean live;
+ MonoVTable *vtable;
+
+ if ((block->block > ptr) || ((block->block + MS_BLOCK_SIZE) <= ptr))
+ continue;
+
+ fprintf (gc_debug_file, "major-ptr (block %p sz %d pin %d ref %d) ",
+ block->block, block->obj_size, block->pinned, block->has_references);
+
+ idx = MS_BLOCK_OBJ_INDEX (ptr, block);
+ obj = (char*)MS_BLOCK_OBJ (block, idx);
+ live = MS_OBJ_ALLOCED (obj, block);
+ vtable = live ? (MonoVTable*)SGEN_LOAD_VTABLE (obj) : NULL;
+
+ if (obj == ptr) {
+ if (live)
+ fprintf (gc_debug_file, "(object %s.%s)", vtable->klass->name_space, vtable->klass->name);
+ else
+ fprintf (gc_debug_file, "(dead-object)");
+ } else {
+ if (live)
+ fprintf (gc_debug_file, "(interior-ptr offset %td of %p %s.%s)",
+ ptr - obj,
+ obj, vtable->klass->name_space, vtable->klass->name);
+ else
+ fprintf (gc_debug_file, "(dead-interior-ptr to %td to %p)",
+ ptr - obj, obj);
+ }
+
+ return TRUE;
+ } END_FOREACH_BLOCK;
+
+ return FALSE;
+}
+
static void
major_check_scan_starts (void)
{
start = i;
} else {
if (start >= 0) {
- mono_sgen_dump_occupied (MS_BLOCK_OBJ (block, start), MS_BLOCK_OBJ (block, i), block->block);
+ sgen_dump_occupied (MS_BLOCK_OBJ (block, start), MS_BLOCK_OBJ (block, i), block->block);
start = -1;
}
}
MS_SET_MARK_BIT ((block), __word, __bit); \
if ((block)->has_references) \
GRAY_OBJECT_ENQUEUE ((queue), (obj)); \
- binary_protocol_mark ((obj), (gpointer)LOAD_VTABLE ((obj)), mono_sgen_safe_object_get_size ((MonoObject*)(obj))); \
+ binary_protocol_mark ((obj), (gpointer)LOAD_VTABLE ((obj)), sgen_safe_object_get_size ((MonoObject*)(obj))); \
} \
} while (0)
#define MS_MARK_OBJECT_AND_ENQUEUE(obj,block,queue) do { \
MS_SET_MARK_BIT ((block), __word, __bit); \
if ((block)->has_references) \
GRAY_OBJECT_ENQUEUE ((queue), (obj)); \
- binary_protocol_mark ((obj), (gpointer)LOAD_VTABLE ((obj)), mono_sgen_safe_object_get_size ((MonoObject*)(obj))); \
+ binary_protocol_mark ((obj), (gpointer)LOAD_VTABLE ((obj)), sgen_safe_object_get_size ((MonoObject*)(obj))); \
} \
} while (0)
#define MS_PAR_MARK_OBJECT_AND_ENQUEUE(obj,block,queue) do { \
if (!__was_marked) { \
if ((block)->has_references) \
GRAY_OBJECT_ENQUEUE ((queue), (obj)); \
- binary_protocol_mark ((obj), (gpointer)LOAD_VTABLE ((obj)), mono_sgen_safe_object_get_size ((MonoObject*)(obj))); \
+ binary_protocol_mark ((obj), (gpointer)LOAD_VTABLE ((obj)), sgen_safe_object_get_size ((MonoObject*)(obj))); \
} \
} while (0)
+static void
+pin_major_object (char *obj, SgenGrayQueue *queue)
+{
+ MSBlockInfo *block = MS_BLOCK_FOR_OBJ (obj);
+ block->has_pinned = TRUE;
+ MS_MARK_OBJECT_AND_ENQUEUE (obj, block, queue);
+}
+
#include "sgen-major-copy-object.h"
#ifdef SGEN_PARALLEL_MARK
major_copy_or_mark_object (void **ptr, SgenGrayQueue *queue)
{
void *obj = *ptr;
- mword vtable_word = *(mword*)obj;
- MonoVTable *vt = (MonoVTable*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
mword objsize;
MSBlockInfo *block;
+ MonoVTable *vt;
HEAVY_STAT (++stat_copy_object_called_major);
DEBUG (9, g_assert (obj));
DEBUG (9, g_assert (current_collection_generation == GENERATION_OLD));
- if (vtable_word & SGEN_FORWARDED_BIT) {
- *ptr = (void*)vt;
- return;
- }
-
- if (ptr_in_nursery (obj)) {
+ if (sgen_ptr_in_nursery (obj)) {
int word, bit;
gboolean has_references;
void *destination;
+ mword vtable_word = *(mword*)obj;
+ vt = (MonoVTable*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
+
+ if (vtable_word & SGEN_FORWARDED_BIT) {
+ *ptr = (void*)vt;
+ return;
+ }
if (vtable_word & SGEN_PINNED_BIT)
return;
+ /* An object in the nursery To Space has already been copied and grayed. Nothing to do. */
+ if (sgen_nursery_is_to_space (obj))
+ return;
+
HEAVY_STAT (++stat_objects_copied_major);
do_copy_object:
- objsize = SGEN_ALIGN_UP (mono_sgen_par_object_get_size (vt, (MonoObject*)obj));
+ objsize = SGEN_ALIGN_UP (sgen_par_object_get_size (vt, (MonoObject*)obj));
has_references = SGEN_VTABLE_HAS_REFERENCES (vt);
- destination = major_alloc_object (objsize, has_references);
+ destination = sgen_minor_collector.par_alloc_for_promotion (obj, objsize, has_references);
if (G_UNLIKELY (!destination)) {
- if (!ptr_in_nursery (obj)) {
+ if (!sgen_ptr_in_nursery (obj)) {
int size_index;
block = MS_BLOCK_FOR_OBJ (obj);
size_index = block->obj_size_index;
evacuate_block_obj_sizes [size_index] = FALSE;
}
- do {
- if (SGEN_CAS_PTR (obj, (void*)((mword)vt | SGEN_PINNED_BIT), vt) == vt) {
- mono_sgen_pin_object (obj, queue);
- break;
- }
-
- vtable_word = *(mword*)obj;
- /*someone else forwarded it, update the pointer and bail out*/
- if (vtable_word & SGEN_FORWARDED_BIT) {
- *ptr = (void*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
- break;
- }
-
- /*someone pinned it, nothing to do.*/
- if (vtable_word & SGEN_PINNED_BIT)
- break;
- } while (TRUE);
+ sgen_parallel_pin_or_update (ptr, obj, vt, queue);
+ sgen_set_pinned_from_failed_allocation (objsize);
return;
}
+ /*
+ * We do this before the CAS because we want to make
+ * sure that if another thread sees the destination
+ * pointer the VTable is already in place. Not doing
+ * this can crash binary protocols.
+ */
+ *(MonoVTable**)destination = vt;
+
if (SGEN_CAS_PTR (obj, (void*)((mword)destination | SGEN_FORWARDED_BIT), vt) == vt) {
gboolean was_marked;
* FIXME: If we make major_alloc_object() give
* us the block info, too, we won't have to
* re-fetch it here.
+ *
+ * FIXME (2): We should rework this to avoid all those nursery checks.
*/
- block = MS_BLOCK_FOR_OBJ (obj);
- MS_CALC_MARK_BIT (word, bit, obj);
- DEBUG (9, g_assert (!MS_MARK_BIT (block, word, bit)));
- MS_PAR_SET_MARK_BIT (was_marked, block, word, bit);
+ /*
+ * For the split nursery allocator the object
+ * might still be in the nursery despite
+ * having being promoted, in which case we
+ * can't mark it.
+ */
+ if (!sgen_ptr_in_nursery (obj)) {
+ block = MS_BLOCK_FOR_OBJ (obj);
+ MS_CALC_MARK_BIT (word, bit, obj);
+ DEBUG (9, g_assert (!MS_MARK_BIT (block, word, bit)));
+ MS_PAR_SET_MARK_BIT (was_marked, block, word, bit);
+ }
} else {
/*
* FIXME: We have allocated destination, but
obj = (void*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
*ptr = obj;
+
+ HEAVY_STAT (++stat_slots_allocated_in_vain);
}
} else {
#ifdef FIXED_HEAP
if (MS_PTR_IN_SMALL_MAJOR_HEAP (obj))
#else
- objsize = SGEN_ALIGN_UP (mono_sgen_par_object_get_size (vt, (MonoObject*)obj));
+ mword vtable_word = *(mword*)obj;
+ vt = (MonoVTable*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
+
+ /* see comment in the non-parallel version below */
+ if (vtable_word & SGEN_FORWARDED_BIT) {
+ *ptr = (void*)vt;
+ return;
+ }
+ objsize = SGEN_ALIGN_UP (sgen_par_object_get_size (vt, (MonoObject*)obj));
if (objsize <= SGEN_MAX_SMALL_OBJ_SIZE)
#endif
if (!block->has_pinned && evacuate_block_obj_sizes [size_index]) {
if (block->is_to_space)
return;
+
+#ifdef FIXED_HEAP
+ {
+ mword vtable_word = *(mword*)obj;
+ vt = (MonoVTable*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
+
+ if (vtable_word & SGEN_FORWARDED_BIT) {
+ *ptr = (void*)vt;
+ return;
+ }
+ }
+#endif
+
HEAVY_STAT (++stat_major_objects_evacuated);
goto do_copy_object;
- } else {
- MS_PAR_MARK_OBJECT_AND_ENQUEUE (obj, block, queue);
}
+
+ MS_PAR_MARK_OBJECT_AND_ENQUEUE (obj, block, queue);
} else {
+#ifdef FIXED_HEAP
+ mword vtable_word = *(mword*)obj;
+ vt = (MonoVTable*)(vtable_word & ~SGEN_VTABLE_BITS_MASK);
+#endif
+
if (vtable_word & SGEN_PINNED_BIT)
return;
- binary_protocol_pin (obj, vt, mono_sgen_safe_object_get_size ((MonoObject*)obj));
+ binary_protocol_pin (obj, vt, sgen_safe_object_get_size ((MonoObject*)obj));
if (SGEN_CAS_PTR (obj, (void*)(vtable_word | SGEN_PINNED_BIT), (void*)vtable_word) == (void*)vtable_word) {
if (SGEN_VTABLE_HAS_REFERENCES (vt))
GRAY_OBJECT_ENQUEUE (queue, obj);
DEBUG (9, g_assert (obj));
DEBUG (9, g_assert (current_collection_generation == GENERATION_OLD));
- if (ptr_in_nursery (obj)) {
+ if (sgen_ptr_in_nursery (obj)) {
int word, bit;
char *forwarded, *old_obj;
if (SGEN_OBJECT_IS_PINNED (obj))
return;
+ /* An object in the nursery To Space has already been copied and grayed. Nothing to do. */
+ if (sgen_nursery_is_to_space (obj))
+ return;
+
HEAVY_STAT (++stat_objects_copied_major);
do_copy_object:
obj = copy_object_no_checks (obj, queue);
if (G_UNLIKELY (old_obj == obj)) {
/*If we fail to evacuate an object we just stop doing it for a given block size as all other will surely fail too.*/
- if (!ptr_in_nursery (obj)) {
+ if (!sgen_ptr_in_nursery (obj)) {
int size_index;
block = MS_BLOCK_FOR_OBJ (obj);
size_index = block->obj_size_index;
* we have that, we can let the allocation function
* give us the block info, too, and we won't have to
* re-fetch it.
+ *
+ * FIXME (2): We should rework this to avoid all those nursery checks.
+ */
+ /*
+ * For the split nursery allocator the object might
+ * still be in the nursery despite having being
+ * promoted, in which case we can't mark it.
*/
- block = MS_BLOCK_FOR_OBJ (obj);
- MS_CALC_MARK_BIT (word, bit, obj);
- DEBUG (9, g_assert (!MS_MARK_BIT (block, word, bit)));
- MS_SET_MARK_BIT (block, word, bit);
+ if (!sgen_ptr_in_nursery (obj)) {
+ block = MS_BLOCK_FOR_OBJ (obj);
+ MS_CALC_MARK_BIT (word, bit, obj);
+ DEBUG (9, g_assert (!MS_MARK_BIT (block, word, bit)));
+ MS_SET_MARK_BIT (block, word, bit);
+ }
} else {
char *forwarded;
-#ifndef FIXED_HEAP
+#ifdef FIXED_HEAP
+ if (MS_PTR_IN_SMALL_MAJOR_HEAP (obj))
+#else
mword objsize;
-#endif
+ /*
+ * If we have don't have a fixed heap we cannot know
+ * whether an object is in the LOS or in the small
+ * object major heap without checking its size. To do
+ * that, however, we need to know that we actually
+ * have a valid object, not a forwarding pointer, so
+ * we have to do this check first.
+ */
if ((forwarded = SGEN_OBJECT_IS_FORWARDED (obj))) {
*ptr = forwarded;
return;
}
-#ifdef FIXED_HEAP
- if (MS_PTR_IN_SMALL_MAJOR_HEAP (obj))
-#else
- objsize = SGEN_ALIGN_UP (mono_sgen_safe_object_get_size ((MonoObject*)obj));
+ objsize = SGEN_ALIGN_UP (sgen_safe_object_get_size ((MonoObject*)obj));
if (objsize <= SGEN_MAX_SMALL_OBJ_SIZE)
#endif
{
int size_index;
+ gboolean evacuate;
block = MS_BLOCK_FOR_OBJ (obj);
size_index = block->obj_size_index;
+ evacuate = evacuate_block_obj_sizes [size_index];
- if (!block->has_pinned && evacuate_block_obj_sizes [size_index]) {
+#ifdef FIXED_HEAP
+ /*
+ * We could also check for !block->has_pinned
+ * here, but it would only make an uncommon case
+ * faster, namely objects that are in blocks
+ * whose slot sizes are evacuated but which have
+ * pinned objects.
+ */
+ if (evacuate && (forwarded = SGEN_OBJECT_IS_FORWARDED (obj))) {
+ *ptr = forwarded;
+ return;
+ }
+#endif
+
+ if (evacuate && !block->has_pinned) {
+ g_assert (!SGEN_OBJECT_IS_PINNED (obj));
if (block->is_to_space)
return;
HEAVY_STAT (++stat_major_objects_evacuated);
} else {
if (SGEN_OBJECT_IS_PINNED (obj))
return;
- binary_protocol_pin (obj, (gpointer)SGEN_LOAD_VTABLE (obj), mono_sgen_safe_object_get_size ((MonoObject*)obj));
+ binary_protocol_pin (obj, (gpointer)SGEN_LOAD_VTABLE (obj), sgen_safe_object_get_size ((MonoObject*)obj));
+ if (MONO_GC_OBJ_PINNED_ENABLED ()) {
+ MONO_GC_OBJ_PINNED (obj, sgen_safe_object_get_size (obj), NULL, GENERATION_OLD);
+ }
SGEN_PIN_OBJECT (obj);
/* FIXME: only enqueue if object has references */
GRAY_OBJECT_ENQUEUE (queue, obj);
} else {
/* an unmarked object */
if (MS_OBJ_ALLOCED (obj, block)) {
+ /*
+ * FIXME: Merge consecutive
+ * slots for lower reporting
+ * overhead. Maybe memset
+ * will also benefit?
+ */
binary_protocol_empty (obj, block->obj_size);
+ MONO_GC_MAJOR_SWEEPED (obj, block->obj_size);
memset (obj, 0, block->obj_size);
}
*(void**)obj = block->free_list;
#else
ms_free_block (block->block);
- mono_sgen_free_internal (block, INTERNAL_MEM_MS_BLOCK_INFO);
+ sgen_free_internal (block, INTERNAL_MEM_MS_BLOCK_INFO);
#endif
--num_major_sections;
have_swept = TRUE;
}
-static void*
+static mono_native_thread_return_t
ms_sweep_thread_func (void *dummy)
{
g_assert (concurrent_sweep);
while ((result = MONO_SEM_WAIT (&ms_sweep_cmd_semaphore)) != 0) {
if (errno != EINTR)
- g_error ("MONO_SEM_WAIT");
+ g_error ("MONO_SEM_WAIT FAILED with %d errno %d (%s)", result, errno, strerror (errno));
}
ms_sweep ();
#ifdef MARKSWEEP_CONSISTENCY_CHECK
consistency_check ();
#endif
- mono_sgen_register_major_sections_alloced (num_major_sections - old_num_major_sections);
+ sgen_register_major_sections_alloced (num_major_sections - old_num_major_sections);
}
static void
major_have_computer_minor_collection_allowance (void)
{
#ifndef FIXED_HEAP
- int section_reserve = mono_sgen_get_minor_collection_allowance () / MS_BLOCK_SIZE;
+ int section_reserve = sgen_get_minor_collection_allowance () / MS_BLOCK_SIZE;
g_assert (have_swept);
ms_wait_for_sweep_done ();
while (num_empty_blocks > section_reserve) {
void *next = *(void**)empty_blocks;
- mono_sgen_free_os_memory (empty_blocks, MS_BLOCK_SIZE);
+ sgen_free_os_memory (empty_blocks, MS_BLOCK_SIZE, TRUE);
empty_blocks = next;
/*
* Needs not be atomic because this is running
MSBlockInfo *block;
FOREACH_BLOCK (block) {
- block->pin_queue_start = mono_sgen_find_optimized_pin_queue_area (block->block + MS_BLOCK_SKIP, block->block + MS_BLOCK_SIZE,
+ block->pin_queue_start = sgen_find_optimized_pin_queue_area (block->block + MS_BLOCK_SKIP, block->block + MS_BLOCK_SIZE,
&block->pin_queue_num_entries);
} END_FOREACH_BLOCK;
}
extern long long marked_cards;
extern long long scanned_cards;
extern long long scanned_objects;
-
+extern long long remarked_cards;
#endif
#define CARD_WORDS_PER_BLOCK (CARDS_PER_BLOCK / SIZEOF_VOID_P)
return card_data + i * 4 + (__builtin_ffs (card) - 1) / 8;
#elif defined(__x86_64__) && defined(__GNUC__)
return card_data + i * 8 + (__builtin_ffsll (card) - 1) / 8;
+#elif defined(__s390x__) && defined(__GNUC__)
+ return card_data + i * 8 + (__builtin_ffsll (GUINT64_TO_LE(card)) - 1) / 8;
#else
for (i = i * SIZEOF_VOID_P; i < CARDS_PER_BLOCK; ++i) {
if (card_data [i])
major_scan_card_table (SgenGrayQueue *queue)
{
MSBlockInfo *block;
+ ScanObjectFunc scan_func = sgen_get_current_object_ops ()->scan_object;
FOREACH_BLOCK (block) {
int block_obj_size;
while (obj < end) {
if (MS_OBJ_ALLOCED_FAST (obj, block_start)) {
HEAVY_STAT (++scanned_objects);
- minor_scan_object (obj, queue);
+ scan_func (obj, queue);
}
obj += block_obj_size;
}
+ HEAVY_STAT (if (*card_data) ++remarked_cards);
}
}
} END_FOREACH_BLOCK;
#endif
static gboolean
-major_is_worker_thread (pthread_t thread)
+major_is_worker_thread (MonoNativeThreadId thread)
{
if (concurrent_sweep)
return thread == ms_sweep_thread;
return FALSE;
}
+static void
+alloc_free_block_lists (MSBlockInfo ***lists)
+{
+ int i;
+ for (i = 0; i < MS_BLOCK_TYPE_MAX; ++i)
+ lists [i] = sgen_alloc_internal_dynamic (sizeof (MSBlockInfo*) * num_block_obj_sizes, INTERNAL_MEM_MS_TABLES, TRUE);
+}
+
+#ifdef SGEN_PARALLEL_MARK
+static void*
+major_alloc_worker_data (void)
+{
+ /* FIXME: free this when the workers come down */
+ MSBlockInfo ***lists = malloc (sizeof (MSBlockInfo**) * MS_BLOCK_TYPE_MAX);
+ alloc_free_block_lists (lists);
+ return lists;
+}
+
+static void
+major_init_worker_thread (void *data)
+{
+ MSBlockInfo ***lists = data;
+ int i;
+
+ g_assert (lists && lists != free_block_lists);
+ for (i = 0; i < MS_BLOCK_TYPE_MAX; ++i) {
+ int j;
+ for (j = 0; j < num_block_obj_sizes; ++j)
+ g_assert (!lists [i][j]);
+ }
+
+#ifdef HAVE_KW_THREAD
+ workers_free_block_lists = data;
+#else
+ mono_native_tls_set_value (workers_free_block_lists_key, data);
+#endif
+}
+
+static void
+major_reset_worker_data (void *data)
+{
+ MSBlockInfo ***lists = data;
+ int i;
+ for (i = 0; i < MS_BLOCK_TYPE_MAX; ++i) {
+ int j;
+ for (j = 0; j < num_block_obj_sizes; ++j)
+ lists [i][j] = NULL;
+ }
+}
+#endif
+
#undef pthread_create
static void
post_param_init (void)
{
if (concurrent_sweep) {
- if (pthread_create (&ms_sweep_thread, NULL, ms_sweep_thread_func, NULL)) {
+ if (!mono_native_thread_create (&ms_sweep_thread, ms_sweep_thread_func, NULL)) {
fprintf (stderr, "Error: Could not create sweep thread.\n");
exit (1);
}
void
#ifdef SGEN_PARALLEL_MARK
#ifdef FIXED_HEAP
-mono_sgen_marksweep_fixed_par_init
+sgen_marksweep_fixed_par_init
#else
-mono_sgen_marksweep_par_init
+sgen_marksweep_par_init
#endif
#else
#ifdef FIXED_HEAP
-mono_sgen_marksweep_fixed_init
+sgen_marksweep_fixed_init
#else
-mono_sgen_marksweep_init
+sgen_marksweep_init
#endif
#endif
(SgenMajorCollector *collector)
int i;
#ifndef FIXED_HEAP
- mono_sgen_register_fixed_internal_mem_type (INTERNAL_MEM_MS_BLOCK_INFO, sizeof (MSBlockInfo));
+ sgen_register_fixed_internal_mem_type (INTERNAL_MEM_MS_BLOCK_INFO, sizeof (MSBlockInfo));
#endif
num_block_obj_sizes = ms_calculate_block_obj_sizes (MS_BLOCK_OBJ_SIZE_FACTOR, NULL);
- block_obj_sizes = mono_sgen_alloc_internal_dynamic (sizeof (int) * num_block_obj_sizes, INTERNAL_MEM_MS_TABLES);
+ block_obj_sizes = sgen_alloc_internal_dynamic (sizeof (int) * num_block_obj_sizes, INTERNAL_MEM_MS_TABLES, TRUE);
ms_calculate_block_obj_sizes (MS_BLOCK_OBJ_SIZE_FACTOR, block_obj_sizes);
- evacuate_block_obj_sizes = mono_sgen_alloc_internal_dynamic (sizeof (gboolean) * num_block_obj_sizes, INTERNAL_MEM_MS_TABLES);
+ evacuate_block_obj_sizes = sgen_alloc_internal_dynamic (sizeof (gboolean) * num_block_obj_sizes, INTERNAL_MEM_MS_TABLES, TRUE);
for (i = 0; i < num_block_obj_sizes; ++i)
evacuate_block_obj_sizes [i] = FALSE;
}
*/
- for (i = 0; i < MS_BLOCK_TYPE_MAX; ++i)
- free_block_lists [i] = mono_sgen_alloc_internal_dynamic (sizeof (MSBlockInfo*) * num_block_obj_sizes, INTERNAL_MEM_MS_TABLES);
+ alloc_free_block_lists (free_block_lists);
for (i = 0; i < MS_NUM_FAST_BLOCK_OBJ_SIZE_INDEXES; ++i)
fast_block_obj_size_indexes [i] = ms_find_block_obj_size_index (i * 8);
for (i = 0; i < MS_NUM_FAST_BLOCK_OBJ_SIZE_INDEXES * 8; ++i)
g_assert (MS_BLOCK_OBJ_SIZE_INDEX (i) == ms_find_block_obj_size_index (i));
+#ifdef SGEN_PARALLEL_MARK
LOCK_INIT (ms_block_list_mutex);
+#endif
mono_counters_register ("# major blocks allocated", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_blocks_alloced);
mono_counters_register ("# major blocks freed", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_blocks_freed);
mono_counters_register ("# major objects evacuated", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_major_objects_evacuated);
- mono_counters_register ("Wait for sweep time", MONO_COUNTER_GC | MONO_COUNTER_LONG, &stat_time_wait_for_sweep);
+ mono_counters_register ("Wait for sweep time", MONO_COUNTER_GC | MONO_COUNTER_TIME_INTERVAL, &stat_time_wait_for_sweep);
+#ifdef SGEN_PARALLEL_MARK
+#ifndef HAVE_KW_THREAD
+ mono_native_tls_alloc (&workers_free_block_lists_key, NULL);
+#endif
+#endif
/*
* FIXME: These are superfluous if concurrent sweep is
collector->section_size = MAJOR_SECTION_SIZE;
#ifdef SGEN_PARALLEL_MARK
collector->is_parallel = TRUE;
+ collector->alloc_worker_data = major_alloc_worker_data;
+ collector->init_worker_thread = major_init_worker_thread;
+ collector->reset_worker_data = major_reset_worker_data;
#else
collector->is_parallel = FALSE;
#endif
collector->is_object_live = major_is_object_live;
collector->alloc_small_pinned_obj = major_alloc_small_pinned_obj;
collector->alloc_degraded = major_alloc_degraded;
- collector->copy_or_mark_object = major_copy_or_mark_object;
+
collector->alloc_object = major_alloc_object;
+#ifdef SGEN_PARALLEL_MARK
+ collector->par_alloc_object = major_par_alloc_object;
+#endif
collector->free_pinned_object = free_pinned_object;
collector->iterate_objects = major_iterate_objects;
collector->free_non_pinned_object = major_free_non_pinned_object;
collector->find_pin_queue_start_ends = major_find_pin_queue_start_ends;
collector->pin_objects = major_pin_objects;
+ collector->pin_major_object = pin_major_object;
#ifdef SGEN_HAVE_CARDTABLE
collector->scan_card_table = major_scan_card_table;
collector->iterate_live_block_ranges = (void*)(void*) major_iterate_live_block_ranges;
collector->print_gc_param_usage = major_print_gc_param_usage;
collector->is_worker_thread = major_is_worker_thread;
collector->post_param_init = post_param_init;
+ collector->is_valid_object = major_is_valid_object;
+ collector->describe_pointer = major_describe_pointer;
- FILL_COLLECTOR_COPY_OBJECT (collector);
- FILL_COLLECTOR_SCAN_OBJECT (collector);
+ collector->major_ops.copy_or_mark_object = major_copy_or_mark_object;
+ collector->major_ops.scan_object = major_scan_object;
#ifdef SGEN_HAVE_CARDTABLE
/*cardtable requires major pages to be 8 cards aligned*/
projects / mono.git / blobdiff