string: Make tests birdirectional test-memcpy.c

This commit updates the memcpy tests to test both dst > src and dst <
src. This is because there is logic in the code based on the

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Noah Goldstein 2021-11-01 00:49:48 -05:00
parent d465e5e0da
commit d585ba47fc
2 changed files with 214 additions and 28 deletions

View File

@ -17,6 +17,7 @@
<https://www.gnu.org/licenses/>. */
#ifndef MEMCPY_RESULT
# define DO_EXTRA_TESTS
# define MEMCPY_RESULT(dst, len) dst
# define MIN_PAGE_SIZE 131072
# define TEST_MAIN
@ -78,7 +79,7 @@ do_one_test (impl_t *impl, char *dst, const char *src,
static void
do_test (size_t align1, size_t align2, size_t len)
{
size_t i, j;
size_t i, j, repeats;
char *s1, *s2;
align1 &= 4095;
@ -91,12 +92,14 @@ do_test (size_t align1, size_t align2, size_t len)
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (repeats = 0; repeats < 2; ++repeats)
{
for (i = 0, j = 1; i < len; i++, j += 23)
s1[i] = j;
for (i = 0, j = 1; i < len; i++, j += 23)
s1[i] = j;
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, len);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, len);
}
}
static void
@ -212,56 +215,87 @@ do_random_tests (void)
}
static void
do_test1 (size_t size)
do_test1 (size_t align1, size_t align2, size_t size)
{
void *large_buf;
large_buf = mmap (NULL, size * 2 + page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
size_t mmap_size, region_size;
align1 &= (page_size - 1);
if (align1 == 0)
align1 = page_size;
align2 &= (page_size - 1);
if (align2 == 0)
align2 = page_size;
region_size = (size + page_size - 1) & (~(page_size - 1));
mmap_size = region_size * 2 + 3 * page_size;
large_buf = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (large_buf == MAP_FAILED)
{
puts ("Failed to allocat large_buf, skipping do_test1");
puts ("Failed to allocate large_buf, skipping do_test1");
return;
}
if (mprotect (large_buf + size, page_size, PROT_NONE))
if (mprotect (large_buf + region_size + page_size, page_size, PROT_NONE))
error (EXIT_FAILURE, errno, "mprotect failed");
size_t arrary_size = size / sizeof (uint32_t);
uint32_t *dest = large_buf;
uint32_t *src = large_buf + size + page_size;
size_t array_size = size / sizeof (uint32_t);
uint32_t *dest = large_buf + align1;
uint32_t *src = large_buf + region_size + 2 * page_size + align2;
size_t i;
size_t repeats;
for(repeats = 0; repeats < 2; repeats++)
{
for (i = 0; i < arrary_size; i++)
for (i = 0; i < array_size; i++)
src[i] = (uint32_t) i;
FOR_EACH_IMPL (impl, 0)
{
printf ("\t\tRunning: %s\n", impl->name);
memset (dest, -1, size);
CALL (impl, (char *) dest, (char *) src, size);
for (i = 0; i < arrary_size; i++)
for (i = 0; i < array_size; i++)
if (dest[i] != src[i])
{
error (0, 0,
"Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
impl->name, dest, src, i);
ret = 1;
munmap ((void *) large_buf, size * 2 + page_size);
munmap ((void *) large_buf, mmap_size);
return;
}
}
dest = src;
src = large_buf;
dest = large_buf + region_size + 2 * page_size + align1;
src = large_buf + align2;
}
munmap ((void *) large_buf, mmap_size);
}
static void
do_random_large_tests (void)
{
size_t i, align1, align2, size;
for (i = 0; i < 32; ++i)
{
align1 = random ();
align2 = random ();
size = (random() % 0x1000000) + 0x200000;
do_test1 (align1, align2, size);
}
for (i = 0; i < 128; ++i)
{
align1 = random ();
align2 = random ();
size = (random() % 32768) + 4096;
do_test1 (align1, align2, size);
}
munmap ((void *) large_buf, size * 2 + page_size);
}
int
test_main (void)
{
size_t i;
size_t i, j;
test_init ();
@ -298,6 +332,7 @@ test_main (void)
for (i = 19; i <= 25; ++i)
{
do_test (255, 0, 1 << i);
do_test (0, 4000, 1 << i);
do_test (0, 255, i);
do_test (0, 4000, i);
}
@ -306,8 +341,88 @@ test_main (void)
do_random_tests ();
do_test1 (0x100000);
do_test1 (0x2000000);
do_test1 (0, 0, 0x100000);
do_test1 (0, 0, 0x2000000);
for (i = 4096; i < 32768; i += 4096)
{
for (j = 1; j <= 1024; j <<= 1)
{
do_test1 (0, j, i);
do_test1 (4095, j, i);
do_test1 (4096 - j, 0, i);
do_test1 (0, j - 1, i);
do_test1 (4095, j - 1, i);
do_test1 (4096 - j - 1, 0, i);
do_test1 (0, j + 1, i);
do_test1 (4095, j + 1, i);
do_test1 (4096 - j, 1, i);
}
}
for (i = 0x300000; i < 0x2000000; i += 0x235689)
{
for (j = 64; j <= 1024; j <<= 1)
{
do_test1 (0, j, i);
do_test1 (4095, j, i);
do_test1 (4096 - j, 0, i);
do_test1 (0, j - 1, i);
do_test1 (4095, j - 1, i);
do_test1 (4096 - j - 1, 0, i);
do_test1 (0, j + 1, i);
do_test1 (4095, j + 1, i);
do_test1 (4096 - j, 1, i);
}
}
#ifdef DO_EXTRA_TESTS
for (i = 0x200000; i <= 0x2000000; i += i)
{
for (j = 64; j <= 1024; j <<= 1)
{
do_test1 (0, j, i);
do_test1 (4095, j, i);
do_test1 (4096 - j, 0, i);
do_test1 (0, j - 1, i);
do_test1 (4095, j - 1, i);
do_test1 (4096 - j - 1, 0, i);
do_test1 (0, j + 1, i);
do_test1 (4095, j + 1, i);
do_test1 (4096 - j, 1, i);
do_test1 (0, j, i + 1);
do_test1 (4095, j, i + 1);
do_test1 (4096 - j, 0, i + 1);
do_test1 (0, j - 1, i + 1);
do_test1 (4095, j - 1, i + 1);
do_test1 (4096 - j - 1, 0, i + 1);
do_test1 (0, j + 1, i + 1);
do_test1 (4095, j + 1, i + 1);
do_test1 (4096 - j, 1, i + 1);
do_test1 (0, j, i - 1);
do_test1 (4095, j, i - 1);
do_test1 (4096 - j, 0, i - 1);
do_test1 (0, j - 1, i - 1);
do_test1 (4095, j - 1, i - 1);
do_test1 (4096 - j - 1, 0, i - 1);
do_test1 (0, j + 1, i - 1);
do_test1 (4095, j + 1, i - 1);
do_test1 (4096 - j, 1, i - 1);
}
}
#endif
do_random_large_tests ();
return ret;
}

View File

@ -100,11 +100,11 @@ do_test (size_t align1, size_t align2, size_t len)
size_t i, j;
char *s1, *s2;
align1 &= 63;
align1 &= (getpagesize() - 1);
if (align1 + len >= page_size)
return;
align2 &= 63;
align2 &= (getpagesize() - 1);
if (align2 + len >= page_size)
return;
@ -355,6 +355,51 @@ do_test3 (size_t bytes_move, size_t offset)
munmap ((void *) buf, size);
}
static void
do_test4 (size_t bytes_move, size_t offset1, size_t offset2)
{
size_t size, repeats, i;
uint8_t *buf, *dst, *src;
size = bytes_move + MAX(offset1, offset2);
buf = mmap(NULL, size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (buf == MAP_FAILED)
error (EXIT_UNSUPPORTED, errno, "mmap failed");
dst = &buf[offset1];
src = &buf[offset2];
for (repeats = 0; repeats < 2; ++repeats)
{
FOR_EACH_IMPL (impl, 0)
{
for (i = 0; i < bytes_move; i++)
src[i] = (uint8_t) i;
#ifdef TEST_BCOPY
CALL (impl, (char *) src, (char *) dst, bytes_move);
#else
CALL (impl, (char *) dst, (char *) src, bytes_move);
#endif
for (i = 0; i < bytes_move; i++)
{
if (dst[i] != (uint8_t) i)
{
error (0, 0,
"Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
impl->name, dst, buf, i);
ret = 1;
break;
}
}
}
dst = &buf[offset2];
src = &buf[offset1];
}
munmap ((void *) buf, size);
}
int
test_main (void)
{
@ -395,13 +440,39 @@ test_main (void)
do_random_tests ();
do_test2 (0);
do_test2 (33);
do_test2 (0x200000 - 1);
do_test2 (0x200000);
do_test2 (0x200000 + 1);
do_test2 (0x1000000 - 1);
do_test2 (0x1000000);
do_test2 (0x1000000 + 1);
do_test2 (0x4000000 - 1);
do_test2 (0x4000000);
do_test2 (0x4000000 + 1);
/* Copy 16KB data. */
do_test3 (16384, 3);
for (i = 4096; i <= 16384; i <<= 1)
{
do_test4 (i, 0, i);
do_test4 (i, 0, i - 1);
do_test4 (i, 0, i + 1);
do_test4 (i, 63, i + 63);
do_test4 (i, 63, i + 64);
do_test4 (i, 63, i);
do_test4 (i, 0, 1);
do_test4 (i, 0, 15);
do_test4 (i, 0, 31);
do_test4 (i, 0, 63);
do_test4 (i, 0, 64);
do_test4 (i, 0, 65);
do_test4 (i, 0, 127);
do_test4 (i, 0, 129);
}
return ret;
}