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

   1 /* { dg-add-options stack_size } */
   2
   3 #include <string.h>
   4
   5 void abort (void);
   6 void exit (int);
   7
   8 #if defined (STACK_SIZE)
   9 #define MEMCPY_SIZE (STACK_SIZE / 3)
  10 #else
  11 #define MEMCPY_SIZE (1 << 17)
  12 #endif
  13
  14
  15 void *copy (void *o, const void *i, unsigned l)
  16 {
  17   return memcpy (o, i, l);
  18 }
  19
  20 int
  21 main (void)
  22 {
  23   unsigned i;
  24   unsigned char src[MEMCPY_SIZE];
  25   unsigned char dst[MEMCPY_SIZE];
  26
  27   for (i = 0; i < MEMCPY_SIZE; i++)
  28     src[i] = (unsigned char) i,  dst[i] = 0;
  29
  30   (void) memcpy (dst, src, MEMCPY_SIZE / 128);
  31
  32   for (i = 0; i < MEMCPY_SIZE / 128; i++)
  33     if (dst[i] != (unsigned char) i)
  34       abort ();
  35
  36   (void) memset (dst, 1, MEMCPY_SIZE / 128);
  37
  38   for (i = 0; i < MEMCPY_SIZE / 128; i++)
  39     if (dst[i] != 1)
  40       abort ();
  41
  42   (void) memcpy (dst, src, MEMCPY_SIZE);
  43
  44   for (i = 0; i < MEMCPY_SIZE; i++)
  45     if (dst[i] != (unsigned char) i)
  46       abort ();
  47
  48   (void) memset (dst, 0, MEMCPY_SIZE);
  49
  50   for (i = 0; i < MEMCPY_SIZE; i++)
  51     if (dst[i] != 0)
  52       abort ();
  53
  54   (void) copy (dst, src, MEMCPY_SIZE / 128);
  55
  56   for (i = 0; i < MEMCPY_SIZE / 128; i++)
  57     if (dst[i] != (unsigned char) i)
  58       abort ();
  59
  60   (void) memset (dst, 0, MEMCPY_SIZE);
  61
  62   (void) copy (dst, src, MEMCPY_SIZE);
  63
  64   for (i = 0; i < MEMCPY_SIZE; i++)
  65     if (dst[i] != (unsigned char) i)
  66       abort ();
  67
  68   exit (0);
  69 }