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164 lines
4.4 KiB
C
164 lines
4.4 KiB
C
/* Support for testing and measuring memcpy functions.
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Copyright (C) 1999-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This fail contains the actual memcpy test functions. It is included
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in test-memcpy.c and test-memcpy-large.c. They are split because
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the tests take a long time to run and splitting them allows for
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simpler parallel testing. */
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#ifndef MEMCPY_RESULT
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#define MEMCPY_RESULT(dst, len) dst
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#define MIN_PAGE_SIZE 131072
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#define TEST_MAIN
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#define TEST_NAME "memcpy"
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#define TIMEOUT (8 * 60)
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#include "test-string.h"
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IMPL (memcpy, 1)
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/* Naive implementation to verify results. */
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char *
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simple_memcpy (char *dst, const char *src, size_t n)
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{
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char *ret = dst;
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while (n--)
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*dst++ = *src++;
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return ret;
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}
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#endif
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typedef char *(*proto_t) (char *, const char *, size_t);
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typedef uint32_t __attribute__ ((may_alias, aligned (1))) unaligned_uint32_t;
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static void
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do_one_test (impl_t *impl, char *dst, const char *src, size_t len)
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{
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size_t i;
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/* Must clear the destination buffer set by the previous run. */
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for (i = 0; i < len; i++)
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dst[i] = 0;
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if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len))
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{
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error (0, 0, "Wrong result in function %s %p %p", impl->name,
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CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len));
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ret = 1;
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return;
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}
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if (memcmp (dst, src, len) != 0)
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{
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error (0, 0,
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"Wrong result in function %s dst %p \"%.*s\" src %p \"%.*s\" len "
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"%zu",
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impl->name, dst, (int)len, dst, src, (int)len, src, len);
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ret = 1;
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return;
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}
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}
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static void
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do_test (size_t align1, size_t align2, size_t len)
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{
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size_t i, j;
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char *s1, *s2;
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align1 &= 4095;
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if (align1 + len >= page_size)
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return;
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align2 &= 4095;
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if (align2 + len >= page_size)
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return;
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s1 = (char *)(buf1 + align1);
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s2 = (char *)(buf2 + align2);
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for (size_t repeats = 0; repeats < 2; ++repeats)
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{
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for (i = 0, j = 1; i < len; i++, j += 23)
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s1[i] = j;
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s2, s1, len);
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s1 = (char *) (buf2 + align1);
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s2 = (char *) (buf1 + align2);
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}
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}
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static void
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do_test1 (size_t align1, size_t align2, size_t size)
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{
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void *large_buf;
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size_t mmap_size, region_size;
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align1 &= (page_size - 1);
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if (align1 == 0)
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align1 = page_size;
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align2 &= (page_size - 1);
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if (align2 == 0)
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align2 = page_size;
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region_size = (size + page_size - 1) & (~(page_size - 1));
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mmap_size = region_size * 2 + 3 * page_size;
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large_buf = mmap (NULL, mmap_size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANON, -1, 0);
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if (large_buf == MAP_FAILED)
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{
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puts ("Failed to allocate large_buf, skipping do_test");
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return;
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}
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if (mprotect (large_buf + region_size + page_size, page_size, PROT_NONE))
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error (EXIT_FAILURE, errno, "mprotect failed");
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size_t array_size = size / sizeof (uint32_t);
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unaligned_uint32_t *dest = large_buf + align1;
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unaligned_uint32_t *src = large_buf + region_size + 2 * page_size + align2;
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size_t i;
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for (size_t repeats = 0; repeats < 2; repeats++)
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{
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for (i = 0; i < array_size; i++)
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src[i] = (uint32_t)i;
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FOR_EACH_IMPL (impl, 0)
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{
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memset (dest, -1, size);
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CALL (impl, (char *)dest, (char *)src, size);
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if (memcmp (src, dest, size))
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{
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for (i = 0; i < array_size; i++)
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if (dest[i] != src[i])
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{
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error (0, 0,
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"Wrong result in function %s dst \"%p\" src \"%p\" "
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"offset \"%zd\"",
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impl->name, dest, src, i);
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ret = 1;
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munmap ((void *)large_buf, mmap_size);
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return;
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}
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}
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}
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dest = large_buf + region_size + 2 * page_size + align1;
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src = large_buf + align2;
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}
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munmap ((void *)large_buf, mmap_size);
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}
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