mono/sgen/sgen-minor-scan-object.h

   1 /*
   2  * sgen-minor-scan-object.h: Object scanning in the nursery collectors.
   3  *
   4  * Copyright 2001-2003 Ximian, Inc
   5  * Copyright 2003-2010 Novell, Inc.
   6  * Copyright (C) 2012 Xamarin Inc
   7  *
   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;
  11  *
  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.
  16  *
  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.
  20  */
  21
  22 extern guint64 stat_scan_object_called_nursery;
  23
  24 #if defined(SGEN_SIMPLE_NURSERY)
  25 #define SERIAL_SCAN_OBJECT simple_nursery_serial_scan_object
  26 #define SERIAL_SCAN_VTYPE simple_nursery_serial_scan_vtype
  27
  28 #elif defined (SGEN_SPLIT_NURSERY)
  29 #define SERIAL_SCAN_OBJECT split_nursery_serial_scan_object
  30 #define SERIAL_SCAN_VTYPE split_nursery_serial_scan_vtype
  31
  32 #else
  33 #error "Please define GC_CONF_NAME"
  34 #endif
  35
  36 #undef HANDLE_PTR
  37 /* Global remsets are handled in SERIAL_COPY_OBJECT_FROM_OBJ */
  38 #define HANDLE_PTR(ptr,obj)     do {    \
  39                 void *__old = *(ptr);   \
  40                 SGEN_OBJECT_LAYOUT_STATISTICS_MARK_BITMAP ((obj), (ptr)); \
  41                 binary_protocol_scan_process_reference ((full_object), (ptr), __old); \
  42                 if (__old) {    \
  43                         SERIAL_COPY_OBJECT_FROM_OBJ ((ptr), queue);     \
  44                         SGEN_COND_LOG (9, __old != *(ptr), "Overwrote field at %p with %p (was: %p)", (ptr), *(ptr), __old); \
  45                 }       \
  46         } while (0)
  47
  48 static void
  49 SERIAL_SCAN_OBJECT (GCObject *full_object, SgenDescriptor desc, SgenGrayQueue *queue)
  50 {
  51         char *start = (char*)full_object;
  52
  53         SGEN_OBJECT_LAYOUT_STATISTICS_DECLARE_BITMAP;
  54
  55 #ifdef HEAVY_STATISTICS
  56         sgen_descriptor_count_scanned_object (desc);
  57 #endif
  58
  59         SGEN_ASSERT (9, sgen_get_current_collection_generation () == GENERATION_NURSERY, "Must not use minor scan during major collection.");
  60
  61 #define SCAN_OBJECT_PROTOCOL
  62 #include "sgen-scan-object.h"
  63
  64         SGEN_OBJECT_LAYOUT_STATISTICS_COMMIT_BITMAP;
  65         HEAVY_STAT (++stat_scan_object_called_nursery);
  66 }
  67
  68 static void
  69 SERIAL_SCAN_VTYPE (GCObject *full_object, char *start, SgenDescriptor desc, SgenGrayQueue *queue BINARY_PROTOCOL_ARG (size_t size))
  70 {
  71         SGEN_OBJECT_LAYOUT_STATISTICS_DECLARE_BITMAP;
  72
  73         SGEN_ASSERT (9, sgen_get_current_collection_generation () == GENERATION_NURSERY, "Must not use minor scan during major collection.");
  74
  75         /* The descriptors include info about the MonoObject header as well */
  76         start -= SGEN_CLIENT_OBJECT_HEADER_SIZE;
  77
  78 #define SCAN_OBJECT_NOVTABLE
  79 #define SCAN_OBJECT_PROTOCOL
  80 #include "sgen-scan-object.h"
  81 }
  82
  83 #define FILL_MINOR_COLLECTOR_SCAN_OBJECT(collector)     do {                    \
  84                 (collector)->serial_ops.scan_object = SERIAL_SCAN_OBJECT;       \
  85                 (collector)->serial_ops.scan_vtype = SERIAL_SCAN_VTYPE; \
  86         } while (0)