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glibc  2.9
Defines | Typedefs | Functions
test-memcpy.c File Reference
#include "test-string.h"
#include "../test-skeleton.c"
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Defines

#define MEMCPY_RESULT(dst, len)   dst
#define MIN_PAGE_SIZE   131072
#define TEST_MAIN

Typedefs

typedef char *(* proto_t )(char *, const char *, size_t)

Functions

char * simple_memcpy (char *, const char *, size_t)
char * builtin_memcpy (char *, const char *, size_t)
static void do_one_test (impl_t *impl, char *dst, const char *src, size_t len)
static void do_test (size_t align1, size_t align2, size_t len)
static void do_random_tests (void)
int test_main (void)

Define Documentation

#define MEMCPY_RESULT (   dst,
  len 
)    dst

Definition at line 22 of file test-memcpy.c.

#define MIN_PAGE_SIZE   131072

Definition at line 23 of file test-memcpy.c.

#define TEST_MAIN

Definition at line 24 of file test-memcpy.c.


Typedef Documentation

typedef char*(* proto_t)(char *, const char *, size_t)

Definition at line 50 of file test-memcpy.c.


Function Documentation

char * builtin_memcpy ( char *  dst,
const char *  src,
size_t  n 
)

Definition at line 44 of file test-memcpy.c.

{
  return __builtin_memcpy (dst, src, n);
}
static void do_one_test ( impl_t impl,
char *  dst,
const char *  src,
size_t  len 
) [static]

Definition at line 53 of file test-memcpy.c.

{
  if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len))
    {
      error (0, 0, "Wrong result in function %s %p %p", impl->name,
            CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len));
      ret = 1;
      return;
    }

  if (memcmp (dst, src, len) != 0)
    {
      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
            impl->name, dst, src);
      ret = 1;
      return;
    }

  if (HP_TIMING_AVAIL)
    {
      hp_timing_t start __attribute ((unused));
      hp_timing_t stop __attribute ((unused));
      hp_timing_t best_time = ~ (hp_timing_t) 0;
      size_t i;

      for (i = 0; i < 32; ++i)
       {
         HP_TIMING_NOW (start);
         CALL (impl, dst, src, len);
         HP_TIMING_NOW (stop);
         HP_TIMING_BEST (best_time, start, stop);
       }

      printf ("\t%zd", (size_t) best_time);
    }
}

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static void do_random_tests ( void  ) [static]

Definition at line 122 of file test-memcpy.c.

{
  size_t i, j, n, align1, align2, len, size1, size2, size;
  int c;
  unsigned char *p1, *p2;
  unsigned char *res;

  for (n = 0; n < ITERATIONS; n++)
    {
      if (n == 0)
       {
         len = getpagesize ();
         size = len + 512;
         size1 = size;
         size2 = size;
         align1 = 512;
         align2 = 512;
       }
      else
       {
         if ((random () & 255) == 0)
           size = 65536;
         else
           size = 768;
         if (size > page_size)
           size = page_size;
         size1 = size;
         size2 = size;
         i = random ();
         if (i & 3)
           size -= 256;
         if (i & 1)
           size1 -= 256;
         if (i & 2)
           size2 -= 256;
         if (i & 4)
           {
             len = random () % size;
             align1 = size1 - len - (random () & 31);
             align2 = size2 - len - (random () & 31);
             if (align1 > size1)
              align1 = 0;
             if (align2 > size2)
              align2 = 0;
           }
         else
           {
             align1 = random () & 63;
             align2 = random () & 63;
             len = random () % size;
             if (align1 + len > size1)
              align1 = size1 - len;
             if (align2 + len > size2)
              align2 = size2 - len;
           }
       }
      p1 = buf1 + page_size - size1;
      p2 = buf2 + page_size - size2;
      c = random () & 255;
      j = align1 + len + 256;
      if (j > size1)
       j = size1;
      for (i = 0; i < j; ++i)
       p1[i] = random () & 255;

      FOR_EACH_IMPL (impl, 1)
       {
         j = align2 + len + 256;
         if (j > size2)
           j = size2;
         memset (p2, c, j);
         res = (unsigned char *) CALL (impl,
                                   (char *) (p2 + align2),
                                   (char *) (p1 + align1), len);
         if (res != MEMCPY_RESULT (p2 + align2, len))
           {
             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
                   n, impl->name, align1, align2, len, res,
                   MEMCPY_RESULT (p2 + align2, len));
             ret = 1;
           }
         for (i = 0; i < align2; ++i)
           {
             if (p2[i] != c)
              {
                error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
                      n, impl->name, align1, align2, len);
                ret = 1;
                break;
              }
           }
         for (i = align2 + len; i < j; ++i)
           {
             if (p2[i] != c)
              {
                error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
                      n, impl->name, align1, align2, len);
                ret = 1;
                break;
              }
           }
         if (memcmp (p1 + align1, p2 + align2, len))
           {
             error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
                   n, impl->name, align1, align2, len);
             ret = 1;
           }
       }
    }
}

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static void do_test ( size_t  align1,
size_t  align2,
size_t  len 
) [static]

Definition at line 92 of file test-memcpy.c.

{
  size_t i, j;
  char *s1, *s2;

  align1 &= 63;
  if (align1 + len >= page_size)
    return;

  align2 &= 63;
  if (align2 + len >= page_size)
    return;

  s1 = (char *) (buf1 + align1);
  s2 = (char *) (buf2 + align2);

  for (i = 0, j = 1; i < len; i++, j += 23)
    s1[i] = j;

  if (HP_TIMING_AVAIL)
    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, s1, len);

  if (HP_TIMING_AVAIL)
    putchar ('\n');
}

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char * simple_memcpy ( char *  dst,
const char *  src,
size_t  n 
)

Definition at line 35 of file test-memcpy.c.

{
  char *ret = dst;
  while (n--)
    *dst++ = *src++;
  return ret;
}
int test_main ( void  )

Definition at line 234 of file test-memcpy.c.

{
  size_t i;

  test_init ();

  printf ("%23s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 0; i < 18; ++i)
    {
      do_test (0, 0, 1 << i);
      do_test (i, 0, 1 << i);
      do_test (0, i, 1 << i);
      do_test (i, i, 1 << i);
    }

  for (i = 0; i < 32; ++i)
    {
      do_test (0, 0, i);
      do_test (i, 0, i);
      do_test (0, i, i);
      do_test (i, i, i);
    }

  for (i = 3; i < 32; ++i)
    {
      if ((i & (i - 1)) == 0)
       continue;
      do_test (0, 0, 16 * i);
      do_test (i, 0, 16 * i);
      do_test (0, i, 16 * i);
      do_test (i, i, 16 * i);
    }

  do_test (0, 0, getpagesize ());

  do_random_tests ();
  return ret;
}

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