mono/sgen/sgen-layout-stats.c

   1 /*
   2  * Copyright Xamarin Inc (http://www.xamarin.com)
   3  *
   4  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   5  */
   6
   7 #include "config.h"
   8 #ifdef HAVE_SGEN_GC
   9
  10 #include "sgen/sgen-gc.h"
  11 #include "sgen/sgen-layout-stats.h"
  12
  13 #ifdef SGEN_OBJECT_LAYOUT_STATISTICS
  14
  15 #define NUM_HISTOGRAM_ENTRIES   (1 << SGEN_OBJECT_LAYOUT_BITMAP_BITS)
  16
  17 static unsigned long histogram [NUM_HISTOGRAM_ENTRIES];
  18 static unsigned long count_bitmap_overflow;
  19 static unsigned long count_ref_array;
  20 static unsigned long count_vtype_array;
  21
  22 void
  23 sgen_object_layout_scanned_bitmap (unsigned int bitmap)
  24 {
  25         g_assert (!(bitmap >> SGEN_OBJECT_LAYOUT_BITMAP_BITS));
  26         ++histogram [bitmap];
  27 }
  28
  29 void
  30 sgen_object_layout_scanned_bitmap_overflow (void)
  31 {
  32         ++count_bitmap_overflow;
  33 }
  34
  35 void
  36 sgen_object_layout_scanned_ref_array (void)
  37 {
  38         ++count_ref_array;
  39 }
  40
  41 void
  42 sgen_object_layout_scanned_vtype_array (void)
  43 {
  44         ++count_vtype_array;
  45 }
  46
  47 void
  48 sgen_object_layout_dump (FILE *out)
  49 {
  50         int i;
  51
  52         for (i = 0; i < NUM_HISTOGRAM_ENTRIES; ++i) {
  53                 if (!histogram [i])
  54                         continue;
  55                 fprintf (out, "%d %lu\n", i, histogram [i]);
  56         }
  57         fprintf (out, "bitmap-overflow %lu\n", count_bitmap_overflow);
  58         fprintf (out, "ref-array %lu\n", count_ref_array);
  59         fprintf (out, "vtype-array %lu\n", count_vtype_array);
  60 }
  61 #else
  62
  63 #ifdef _MSC_VER
  64 // Quiet Visual Studio linker warning, LNK4221, in cases when this source file intentional ends up empty.
  65 void __mono_win32_sgen_layout_stats_quiet_lnk4221(void) {}
  66 #endif
  67 #endif /* SGEN_OBJECT_LAYOUT_STATISTICS */
  68 #endif