317 lines
6.9 KiB
C
317 lines
6.9 KiB
C
/* Test and measure memmove functions.
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Copyright (C) 1999-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Written by Jakub Jelinek <jakub@redhat.com>, 1999.
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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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<http://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifdef TEST_BCOPY
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# define TEST_NAME "bcopy"
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#else
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# define TEST_NAME "memmove"
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#endif
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#include "test-string.h"
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char *simple_memmove (char *, const char *, size_t);
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#ifdef TEST_BCOPY
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typedef void (*proto_t) (const char *, char *, size_t);
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void simple_bcopy (const char *, char *, size_t);
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IMPL (simple_bcopy, 0)
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IMPL (bcopy, 1)
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void
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simple_bcopy (const char *src, char *dst, size_t n)
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{
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simple_memmove (dst, src, n);
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}
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#else
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typedef char *(*proto_t) (char *, const char *, size_t);
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IMPL (simple_memmove, 0)
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IMPL (memmove, 1)
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#endif
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char *
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simple_memmove (char *dst, const char *src, size_t n)
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{
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char *ret = dst;
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if (src < dst)
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{
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dst += n;
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src += n;
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while (n--)
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*--dst = *--src;
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}
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else
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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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static void
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do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
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size_t len)
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{
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memcpy (src, orig_src, len);
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#ifdef TEST_BCOPY
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CALL (impl, src, dst, len);
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#else
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char *res;
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res = CALL (impl, dst, src, len);
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if (res != dst)
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{
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error (0, 0, "Wrong result in function %s %p %p", impl->name,
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res, dst);
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ret = 1;
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return;
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}
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#endif
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if (memcmp (dst, orig_src, len) != 0)
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{
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error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
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impl->name, dst, src);
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ret = 1;
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return;
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}
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if (HP_TIMING_AVAIL)
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{
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hp_timing_t start __attribute ((unused));
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hp_timing_t stop __attribute ((unused));
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hp_timing_t best_time = ~ (hp_timing_t) 0;
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size_t i;
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for (i = 0; i < 32; ++i)
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{
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HP_TIMING_NOW (start);
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#ifdef TEST_BCOPY
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CALL (impl, src, dst, len);
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#else
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CALL (impl, dst, src, len);
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#endif
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HP_TIMING_NOW (stop);
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HP_TIMING_BEST (best_time, start, stop);
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}
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printf ("\t%zd", (size_t) best_time);
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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 &= 63;
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if (align1 + len >= page_size)
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return;
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align2 &= 63;
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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 (i = 0, j = 1; i < len; i++, j += 23)
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s1[i] = j;
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if (HP_TIMING_AVAIL)
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printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
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if (HP_TIMING_AVAIL)
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putchar ('\n');
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}
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static void
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do_random_tests (void)
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{
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size_t i, n, align1, align2, len, size;
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size_t srcstart, srcend, dststart, dstend;
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int c;
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unsigned char *p1, *p2;
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#ifndef TEST_BCOPY
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unsigned char *res;
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#endif
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for (n = 0; n < ITERATIONS; n++)
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{
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if ((random () & 255) == 0)
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size = 65536;
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else
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size = 512;
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if (size > page_size)
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size = page_size;
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if ((random () & 3) == 0)
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{
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len = random () & (size - 1);
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align1 = size - len - (random () & 31);
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align2 = size - len - (random () & 31);
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if (align1 > size)
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align1 = 0;
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if (align2 > size)
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align2 = 0;
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}
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else
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{
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align1 = random () & (size / 2 - 1);
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align2 = random () & (size / 2 - 1);
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len = random () & (size - 1);
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if (align1 + len > size)
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align1 = size - len;
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if (align2 + len > size)
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align2 = size - len;
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}
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p1 = buf1 + page_size - size;
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p2 = buf2 + page_size - size;
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c = random () & 255;
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srcend = align1 + len + 256;
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if (srcend > size)
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srcend = size;
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if (align1 > 256)
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srcstart = align1 - 256;
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else
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srcstart = 0;
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for (i = srcstart; i < srcend; ++i)
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p1[i] = random () & 255;
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dstend = align2 + len + 256;
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if (dstend > size)
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dstend = size;
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if (align2 > 256)
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dststart = align2 - 256;
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else
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dststart = 0;
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FOR_EACH_IMPL (impl, 1)
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{
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memset (p2 + dststart, c, dstend - dststart);
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memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
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#ifdef TEST_BCOPY
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CALL (impl, (char *) (p2 + align1), (char *) (p2 + align2), len);
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#else
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res = (unsigned char *) CALL (impl,
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(char *) (p2 + align2),
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(char *) (p2 + align1), len);
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if (res != p2 + align2)
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{
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error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
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n, impl->name, align1, align2, len, res, p2 + align2);
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ret = 1;
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}
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#endif
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if (memcmp (p1 + align1, p2 + align2, len))
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{
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error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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}
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for (i = dststart; i < dstend; ++i)
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{
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if (i >= align2 && i < align2 + len)
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{
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i = align2 + len - 1;
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continue;
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}
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if (i >= srcstart && i < srcend)
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{
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i = srcend - 1;
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continue;
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}
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if (p2[i] != c)
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{
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error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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}
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if (srcstart < align2
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&& memcmp (p2 + srcstart, p1 + srcstart,
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(srcend > align2 ? align2 : srcend) - srcstart))
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{
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error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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i = srcstart > align2 + len ? srcstart : align2 + len;
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if (srcend > align2 + len
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&& memcmp (p2 + i, p1 + i, srcend - i))
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{
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error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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}
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}
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}
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int
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test_main (void)
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{
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size_t i;
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test_init ();
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printf ("%23s", "");
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FOR_EACH_IMPL (impl, 0)
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printf ("\t%s", impl->name);
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putchar ('\n');
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for (i = 0; i < 14; ++i)
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{
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do_test (0, 32, 1 << i);
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do_test (32, 0, 1 << i);
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do_test (0, i, 1 << i);
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do_test (i, 0, 1 << i);
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}
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for (i = 0; i < 32; ++i)
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{
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do_test (0, 32, i);
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do_test (32, 0, i);
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do_test (0, i, i);
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do_test (i, 0, i);
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}
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for (i = 3; i < 32; ++i)
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{
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if ((i & (i - 1)) == 0)
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continue;
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do_test (0, 32, 16 * i);
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do_test (32, 0, 16 * i);
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do_test (0, i, 16 * i);
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do_test (i, 0, 16 * i);
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}
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do_random_tests ();
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return ret;
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}
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#include "../test-skeleton.c"
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