modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/memcpy-1.c (about)

     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  }