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  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   9  */
  10
  11 extern guint64 stat_scan_object_called_nursery;
  12
  13 #undef SERIAL_SCAN_OBJECT
  14 #undef SERIAL_SCAN_VTYPE
  15 #undef SERIAL_SCAN_PTR_FIELD
  16
  17 #if defined(SGEN_SIMPLE_NURSERY)
  18
  19 #ifdef SGEN_CONCURRENT_MAJOR
  20 #define SERIAL_SCAN_OBJECT simple_nursery_serial_with_concurrent_major_scan_object
  21 #define SERIAL_SCAN_VTYPE simple_nursery_serial_with_concurrent_major_scan_vtype
  22 #define SERIAL_SCAN_PTR_FIELD simple_nursery_serial_with_concurrent_major_scan_ptr_field
  23 #else
  24 #define SERIAL_SCAN_OBJECT simple_nursery_serial_scan_object
  25 #define SERIAL_SCAN_VTYPE simple_nursery_serial_scan_vtype
  26 #define SERIAL_SCAN_PTR_FIELD simple_nursery_serial_scan_ptr_field
  27 #endif
  28
  29 #elif defined (SGEN_SPLIT_NURSERY)
  30
  31 #ifdef SGEN_CONCURRENT_MAJOR
  32 #define SERIAL_SCAN_OBJECT split_nursery_serial_with_concurrent_major_scan_object
  33 #define SERIAL_SCAN_VTYPE split_nursery_serial_with_concurrent_major_scan_vtype
  34 #define SERIAL_SCAN_PTR_FIELD split_nursery_serial_with_concurrent_major_scan_ptr_field
  35 #else
  36 #define SERIAL_SCAN_OBJECT split_nursery_serial_scan_object
  37 #define SERIAL_SCAN_VTYPE split_nursery_serial_scan_vtype
  38 #define SERIAL_SCAN_PTR_FIELD split_nursery_serial_scan_ptr_field
  39 #endif
  40
  41 #else
  42 #error "No nursery configuration specified"
  43 #endif
  44
  45 #undef HANDLE_PTR
  46 /* Global remsets are handled in SERIAL_COPY_OBJECT_FROM_OBJ */
  47 #define HANDLE_PTR(ptr,obj)     do {    \
  48                 void *__old = *(ptr);   \
  49                 SGEN_OBJECT_LAYOUT_STATISTICS_MARK_BITMAP ((obj), (ptr)); \
  50                 binary_protocol_scan_process_reference ((full_object), (ptr), __old); \
  51                 if (__old) {    \
  52                         SERIAL_COPY_OBJECT_FROM_OBJ ((ptr), queue);     \
  53                         SGEN_COND_LOG (9, __old != *(ptr), "Overwrote field at %p with %p (was: %p)", (ptr), *(ptr), __old); \
  54                 }       \
  55         } while (0)
  56
  57 static void
  58 SERIAL_SCAN_OBJECT (GCObject *full_object, SgenDescriptor desc, SgenGrayQueue *queue)
  59 {
  60         char *start = (char*)full_object;
  61
  62         SGEN_OBJECT_LAYOUT_STATISTICS_DECLARE_BITMAP;
  63
  64 #ifdef HEAVY_STATISTICS
  65         sgen_descriptor_count_scanned_object (desc);
  66 #endif
  67
  68         SGEN_ASSERT (9, sgen_get_current_collection_generation () == GENERATION_NURSERY, "Must not use minor scan during major collection.");
  69
  70 #define SCAN_OBJECT_PROTOCOL
  71 #include "sgen-scan-object.h"
  72
  73         SGEN_OBJECT_LAYOUT_STATISTICS_COMMIT_BITMAP;
  74         HEAVY_STAT (++stat_scan_object_called_nursery);
  75 }
  76
  77 static void
  78 SERIAL_SCAN_VTYPE (GCObject *full_object, char *start, SgenDescriptor desc, SgenGrayQueue *queue BINARY_PROTOCOL_ARG (size_t size))
  79 {
  80         SGEN_OBJECT_LAYOUT_STATISTICS_DECLARE_BITMAP;
  81
  82         SGEN_ASSERT (9, sgen_get_current_collection_generation () == GENERATION_NURSERY, "Must not use minor scan during major collection.");
  83
  84         /* The descriptors include info about the MonoObject header as well */
  85         start -= SGEN_CLIENT_OBJECT_HEADER_SIZE;
  86
  87 #define SCAN_OBJECT_NOVTABLE
  88 #define SCAN_OBJECT_PROTOCOL
  89 #include "sgen-scan-object.h"
  90 }
  91
  92 static void
  93 SERIAL_SCAN_PTR_FIELD (GCObject *full_object, GCObject **ptr, SgenGrayQueue *queue)
  94 {
  95         HANDLE_PTR (ptr, NULL);
  96 }
  97
  98 #define FILL_MINOR_COLLECTOR_SCAN_OBJECT(ops)   do {                    \
  99                 (ops)->scan_object = SERIAL_SCAN_OBJECT;                        \
 100                 (ops)->scan_vtype = SERIAL_SCAN_VTYPE;                  \
 101                 (ops)->scan_ptr_field = SERIAL_SCAN_PTR_FIELD;          \
 102         } while (0)