gcc/testsuite/gcc.c-torture/execute/memcpy-1.c

   1 /* { dg-add-options stack_size } */
   2
   3 #include <string.h>
   4
   5 #if defined (STACK_SIZE)
   6 #define MEMCPY_SIZE (STACK_SIZE / 3)
   7 #else
   8 #define MEMCPY_SIZE (1 << 17)
   9 #endif
  10
  11
  12 void *copy (void *o, const void *i, unsigned l)
  13 {
  14   return memcpy (o, i, l);
  15 }
  16
  17 main ()
  18 {
  19   unsigned i;
  20   unsigned char src[MEMCPY_SIZE];
  21   unsigned char dst[MEMCPY_SIZE];
  22
  23   for (i = 0; i < MEMCPY_SIZE; i++)
  24     src[i] = (unsigned char) i,  dst[i] = 0;
  25
  26   (void) memcpy (dst, src, MEMCPY_SIZE / 128);
  27
  28   for (i = 0; i < MEMCPY_SIZE / 128; i++)
  29     if (dst[i] != (unsigned char) i)
  30       abort ();
  31
  32   (void) memset (dst, 1, MEMCPY_SIZE / 128);
  33
  34   for (i = 0; i < MEMCPY_SIZE / 128; i++)
  35     if (dst[i] != 1)
  36       abort ();
  37
  38   (void) memcpy (dst, src, MEMCPY_SIZE);
  39
  40   for (i = 0; i < MEMCPY_SIZE; i++)
  41     if (dst[i] != (unsigned char) i)
  42       abort ();
  43
  44   (void) memset (dst, 0, MEMCPY_SIZE);
  45
  46   for (i = 0; i < MEMCPY_SIZE; i++)
  47     if (dst[i] != 0)
  48       abort ();
  49
  50   (void) copy (dst, src, MEMCPY_SIZE / 128);
  51
  52   for (i = 0; i < MEMCPY_SIZE / 128; i++)
  53     if (dst[i] != (unsigned char) i)
  54       abort ();
  55
  56   (void) memset (dst, 0, MEMCPY_SIZE);
  57
  58   (void) copy (dst, src, MEMCPY_SIZE);
  59
  60   for (i = 0; i < MEMCPY_SIZE; i++)
  61     if (dst[i] != (unsigned char) i)
  62       abort ();
  63
  64   exit (0);
  65 }