[sgen] Add option for parallel nursery collector

[mono.git] / mono / sgen / sgen-gc.h

diff --git a/mono/sgen/sgen-gc.h b/mono/sgen/sgen-gc.h
index 1609d2386b6c4fa5eef21b11837bc2cd9dfe9a57..f90c44469454e6bc50850a031464269296f61c8d 100644 (file)
--- a/mono/sgen/sgen-gc.h
+++ b/mono/sgen/sgen-gc.h
@@ -1,5 +1,6 @@
-/*
- * sgen-gc.c: Simple generational GC.
+/**
+ * \file
+ * Simple generational GC.
  *
  * Copyright 2001-2003 Ximian, Inc
  * Copyright 2003-2010 Novell, Inc.
@@ -254,7 +255,7 @@ sgen_get_nursery_end (void)
 #define SGEN_POINTER_UNTAG_VTABLE(p)           SGEN_POINTER_UNTAG_ALL((p))
 
 /* returns NULL if not forwarded, or the forwarded address */
-#define SGEN_VTABLE_IS_FORWARDED(vtable) ((GCVTable *)(SGEN_POINTER_IS_TAGGED_FORWARDED ((vtable)) ? SGEN_POINTER_UNTAG_VTABLE ((vtable)) : NULL))
+#define SGEN_VTABLE_IS_FORWARDED(vtable) ((GCObject *)(SGEN_POINTER_IS_TAGGED_FORWARDED ((vtable)) ? SGEN_POINTER_UNTAG_VTABLE ((vtable)) : NULL))
 #define SGEN_OBJECT_IS_FORWARDED(obj) ((GCObject *)SGEN_VTABLE_IS_FORWARDED (((mword*)(obj))[0]))
 
 #define SGEN_VTABLE_IS_PINNED(vtable) SGEN_POINTER_IS_TAGGED_PINNED ((vtable))
@@ -266,6 +267,18 @@ sgen_get_nursery_end (void)
 #define SGEN_FORWARD_OBJECT(obj,fw_addr) do {                          \
                *(void**)(obj) = SGEN_POINTER_TAG_FORWARDED ((fw_addr));        \
        } while (0)
+#define SGEN_FORWARD_OBJECT_PAR(obj,fw_addr,final_fw_addr) do {                        \
+               gpointer old_vtable_word = *(gpointer*)obj;                     \
+               gpointer new_vtable_word;                                       \
+               final_fw_addr = SGEN_VTABLE_IS_FORWARDED (old_vtable_word);     \
+               if (final_fw_addr)                                              \
+                       break;                                                  \
+               new_vtable_word = SGEN_POINTER_TAG_FORWARDED ((fw_addr));       \
+               old_vtable_word = InterlockedCompareExchangePointer ((gpointer*)obj, new_vtable_word, old_vtable_word); \
+               final_fw_addr = SGEN_VTABLE_IS_FORWARDED (old_vtable_word);     \
+               if (!final_fw_addr)                                             \
+                       final_fw_addr = (fw_addr);                              \
+       } while (0)
 #define SGEN_PIN_OBJECT(obj) do {      \
                *(void**)(obj) = SGEN_POINTER_TAG_PINNED (*(void**)(obj)); \
        } while (0)
@@ -546,6 +559,7 @@ sgen_nursery_is_object_alive (GCObject *obj)
 
 typedef struct {
        gboolean is_split;
+       gboolean is_parallel;
 
        GCObject* (*alloc_for_promotion) (GCVTable vtable, GCObject *obj, size_t objsize, gboolean has_references);
 
@@ -565,7 +579,7 @@ typedef struct {
 
 extern SgenMinorCollector sgen_minor_collector;
 
-void sgen_simple_nursery_init (SgenMinorCollector *collector);
+void sgen_simple_nursery_init (SgenMinorCollector *collector, gboolean parallel);
 void sgen_split_nursery_init (SgenMinorCollector *collector);
 
 /* Updating references */
@@ -637,6 +651,7 @@ struct _SgenMajorCollector {
        SgenObjectOperations major_ops_conc_par_finish;
 
        GCObject* (*alloc_object) (GCVTable vtable, size_t size, gboolean has_references);
+       GCObject* (*alloc_object_par) (GCVTable vtable, size_t size, gboolean has_references);
        void (*free_pinned_object) (GCObject *obj, size_t size);
 
        /*
@@ -648,7 +663,7 @@ struct _SgenMajorCollector {
        void (*free_non_pinned_object) (GCObject *obj, size_t size);
        void (*pin_objects) (SgenGrayQueue *queue);
        void (*pin_major_object) (GCObject *obj, SgenGrayQueue *queue);
-       void (*scan_card_table) (CardTableScanType scan_type, ScanCopyContext ctx);
+       void (*scan_card_table) (CardTableScanType scan_type, ScanCopyContext ctx, int job_index, int job_split_count);
        void (*iterate_live_block_ranges) (sgen_cardtable_block_callback callback);
        void (*iterate_block_ranges) (sgen_cardtable_block_callback callback);
        void (*update_cardtable_mod_union) (void);
@@ -677,6 +692,8 @@ struct _SgenMajorCollector {
        guint8* (*get_cardtable_mod_union_for_reference) (char *object);
        long long (*get_and_reset_num_major_objects_marked) (void);
        void (*count_cards) (long long *num_total_cards, long long *num_marked_cards);
+
+       void (*worker_init_cb) (gpointer worker);
 };
 
 extern SgenMajorCollector major_collector;
@@ -738,12 +755,18 @@ static mword sgen_client_slow_object_get_size (GCVTable vtable, GCObject* o);
 static inline mword
 sgen_safe_object_get_size (GCObject *obj)
 {
-       GCObject *forwarded;
-
-       if ((forwarded = SGEN_OBJECT_IS_FORWARDED (obj)))
-               obj = forwarded;
+       GCObject *forwarded;
+       GCVTable vtable = SGEN_LOAD_VTABLE_UNCHECKED (obj);
 
-       return sgen_client_par_object_get_size (SGEN_LOAD_VTABLE (obj), obj);
+       /*
+        * Once we load the vtable, we must always use it, in case we are in parallel case.
+        * Otherwise the object might get forwarded in the meantime and we would read an
+        * invalid vtable. An object cannot be forwarded for a second time during same GC.
+        */
+       if ((forwarded = SGEN_VTABLE_IS_FORWARDED (vtable)))
+               return sgen_client_par_object_get_size (SGEN_LOAD_VTABLE (forwarded), obj);
+       else
+               return sgen_client_par_object_get_size ((GCVTable)SGEN_POINTER_UNTAG_ALL (vtable), obj);
 }
 
 static inline gboolean
@@ -811,6 +834,9 @@ void sgen_finalize_if (SgenObjectPredicateFunc predicate, void *user_data);
 void sgen_remove_finalizers_if (SgenObjectPredicateFunc predicate, void *user_data, int generation);
 void sgen_set_suspend_finalizers (void);
 
+void sgen_wbroots_iterate_live_block_ranges (sgen_cardtable_block_callback cb);
+void sgen_wbroots_scan_card_table (ScanCopyContext ctx);
+
 void sgen_register_disappearing_link (GCObject *obj, void **link, gboolean track, gboolean in_gc);
 
 GCObject* sgen_weak_link_get (void **link_addr);
@@ -866,7 +892,7 @@ void sgen_los_sweep (void);
 gboolean sgen_ptr_is_in_los (char *ptr, char **start);
 void sgen_los_iterate_objects (IterateObjectCallbackFunc cb, void *user_data);
 void sgen_los_iterate_live_block_ranges (sgen_cardtable_block_callback callback);
-void sgen_los_scan_card_table (CardTableScanType scan_type, ScanCopyContext ctx);
+void sgen_los_scan_card_table (CardTableScanType scan_type, ScanCopyContext ctx, int job_index, int job_split_count);
 void sgen_los_update_cardtable_mod_union (void);
 void sgen_los_count_cards (long long *num_total_cards, long long *num_marked_cards);
 gboolean sgen_los_is_valid_object (char *object);
@@ -874,6 +900,7 @@ gboolean mono_sgen_los_describe_pointer (char *ptr);
 LOSObject* sgen_los_header_for_object (GCObject *data);
 mword sgen_los_object_size (LOSObject *obj);
 void sgen_los_pin_object (GCObject *obj);
+gboolean sgen_los_pin_object_par (GCObject *obj);
 gboolean sgen_los_object_is_pinned (GCObject *obj);
 void sgen_los_mark_mod_union_card (GCObject *mono_obj, void **ptr);