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/*
* Copyright (c) 2011 ARM Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the company may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#ifndef BUFF_SIZE
#define BUFF_SIZE 1024
#endif
#ifndef START_COPY
#define START_COPY 256
#endif
#ifndef MAX_BLOCK_SIZE
#define MAX_BLOCK_SIZE 128
#endif
#ifndef MAX_OFFSET
#define MAX_OFFSET 3
#endif
#if (START_COPY + MAX_OFFSET + MAX_BLOCK_SIZE >= BUFF_SIZE)
#error "Buffer overrun: START_COPY + MAX_OFFSET + MAX_BLOCK_SIZE >= BUFF_SIZE."
#endif
#define TOO_MANY_ERRORS 11
int errors = 0;
void
print_error (char const* msg, ...)
{
errors++;
if (errors == TOO_MANY_ERRORS)
{
fprintf (stderr, "Too many errors.\n");
}
else if (errors < TOO_MANY_ERRORS)
{
va_list ap;
va_start (ap, msg);
vfprintf (stderr, msg, ap);
va_end (ap);
}
else
{
/* Further errors omitted. */
}
}
int
main (void)
{
/* Allocate buffers to read and write from. */
char src[BUFF_SIZE], dest[BUFF_SIZE], backup_src[BUFF_SIZE];
/* Fill the source buffer with non-null values, reproducable random data. */
srand (1539);
int i, j;
unsigned sa;
unsigned da;
unsigned n;
for (i = 0; i < BUFF_SIZE; i++)
{
src[i] = (char)rand () | 1;
backup_src[i] = src[i];
}
/* Make calls to memcpy with block sizes ranging between 1 and
MAX_BLOCK_SIZE bytes, aligned and misaligned source and destination. */
for (sa = 0; sa <= MAX_OFFSET; sa++)
for (da = 0; da <= MAX_OFFSET; da++)
for (n = 1; n <= MAX_BLOCK_SIZE; n++)
{
printf (".");
/* Zero dest so we can check it properly after the copying. */
for (j = 0; j < BUFF_SIZE; j++)
dest[j] = 0;
void *ret = memcpy (dest + START_COPY + da, src + sa, n);
/* Check return value. */
if (ret != (dest + START_COPY + da))
print_error ("\nFailed: wrong return value in memcpy of %u bytes "
"with src_align %u and dst_align %u. "
"Return value and dest should be the same"
"(ret is %p, dest is %p)\n",
n, sa, da, ret, dest + START_COPY + da);
/* Check that content of the destination buffer
is the same as the source buffer, and
memory outside destination buffer is not modified. */
for (j = 0; j < BUFF_SIZE; j++)
if (j < START_COPY + da)
{
if (dest[j] != 0)
print_error ("\nFailed: after memcpy of %u bytes "
"with src_align %u and dst_align %u, "
"byte %u before the start of dest is not 0.\n",
n, sa, da, START_COPY - j);
}
else if (j < START_COPY + da + n)
{
i = j - START_COPY - da;
if (dest[j] != (src + sa)[i])
print_error ("\nFailed: after memcpy of %u bytes "
"with src_align %u and dst_align %u, "
"byte %u in dest and src are not the same.\n",
n, sa, da, i);
}
else if (dest[j] != 0)
{
print_error ("\nFailed: after memcpy of %u bytes "
"with src_align %u and dst_align %u, "
"byte %u after the end of dest is not 0.\n",
n, sa, da, j - START_COPY - da - n);
}
/* Check src is not modified. */
for (j = 0; j < BUFF_SIZE; j++)
if (src[i] != backup_src[i])
print_error ("\nFailed: after memcpy of %u bytes "
"with src_align %u and dst_align %u, "
"byte %u of src is modified.\n",
n, sa, da, j);
}
printf ("\n");
if (errors != 0)
abort ();
exit (0);
}
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