gdb/testsuite/gdb.base/sizeof.c

   1 typedef char padding[16];
   2
   3 struct {
   4   padding p1;
   5   char v;
   6   padding p2;
   7 } padding_char;
   8
   9 struct {
  10   padding p1;
  11   short v;
  12   padding p2;
  13 } padding_short;
  14
  15 struct {
  16   padding p1;
  17   int v;
  18   padding p2;
  19 } padding_int;
  20
  21 struct {
  22   padding p1;
  23   long v;
  24   padding p2;
  25 } padding_long;
  26
  27 struct {
  28   padding p1;
  29   long long v;
  30   padding p2;
  31 } padding_long_long;
  32
  33 struct {
  34   padding p1;
  35   float v;
  36   padding p2;
  37 } padding_float;
  38
  39 struct {
  40   padding p1;
  41   double v;
  42   padding p2;
  43 } padding_double;
  44
  45 struct {
  46   padding p1;
  47   long double v;
  48   padding p2;
  49 } padding_long_double;
  50
  51 static void
  52 fill (void *buf, long sizeof_buf)
  53 {
  54   char *p = buf;
  55   int i;
  56   for (i = 0; i < sizeof_buf; i++)
  57     p[i] = "The quick brown dingo jumped over the layzy dog."[i];
  58 }
  59
  60 void
  61 fill_structs (void)
  62 {
  63   fill (&padding_char.p1, sizeof (padding));
  64   fill (&padding_char.v, sizeof (padding_char.v));
  65   fill (&padding_char.p2, sizeof (padding));
  66
  67   fill (&padding_short.p1, sizeof (padding));
  68   fill (&padding_short.v, sizeof (padding_short.v));
  69   fill (&padding_short.p2, sizeof (padding));
  70
  71   fill (&padding_int.p1, sizeof (padding));
  72   fill (&padding_int.v, sizeof (padding_int.v));
  73   fill (&padding_int.p2, sizeof (padding));
  74
  75   fill (&padding_long.p1, sizeof (padding));
  76   fill (&padding_long.v, sizeof (padding_long.v));
  77   fill (&padding_long.p2, sizeof (padding));
  78
  79   fill (&padding_long_long.p1, sizeof (padding));
  80   fill (&padding_long_long.v, sizeof (padding_long_long.v));
  81   fill (&padding_long_long.p2, sizeof (padding));
  82
  83   fill (&padding_float.p1, sizeof (padding));
  84   fill (&padding_float.v, sizeof (padding_float.v));
  85   fill (&padding_float.p2, sizeof (padding));
  86
  87   fill (&padding_double.p1, sizeof (padding));
  88   fill (&padding_double.v, sizeof (padding_double.v));
  89   fill (&padding_double.p2, sizeof (padding));
  90
  91   fill (&padding_long_double.p1, sizeof (padding));
  92   fill (&padding_long_double.v, sizeof (padding_long_double.v));
  93   fill (&padding_long_double.p2, sizeof (padding));
  94 }
  95
  96 int
  97 main ()
  98 {
  99   int size, value;
 100
 101   fill_structs ();
 102
 103   size = (int) sizeof (char);
 104   size = (int) sizeof (short);
 105   size = (int) sizeof (int);
 106   size = (int) sizeof (long);
 107   size = (int) sizeof (long long);
 108   size = (int) sizeof (void*);
 109   size = (int) sizeof (void (*)(void));
 110   size = (int) sizeof (float);
 111   size = (int) sizeof (double);
 112   size = (int) sizeof (long double);
 113
 114   /* Signed char?  */
 115   value = '\377';
 116   value = (int) (char) -1;
 117   value = (int) (signed char) -1;
 118   value = (int) (unsigned char) -1;
 119
 120   return 0;
 121 }