30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
410 lines
9 KiB
C
410 lines
9 KiB
C
/* Test and measure memmove functions.
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Copyright (C) 1999-2021 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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#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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#include <support/test-driver.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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inhibit_loop_to_libcall
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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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/* This also clears the destination buffer set by the previous run. */
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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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}
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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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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
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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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static void
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do_test2 (size_t offset)
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{
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size_t size = 0x20000000;
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uint32_t * large_buf;
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large_buf = mmap ((void*) 0x70000000, 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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error (EXIT_UNSUPPORTED, errno, "Large mmap failed");
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if ((uintptr_t) large_buf > 0x80000000 - 128
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|| 0x80000000 - (uintptr_t) large_buf > 0x20000000)
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{
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error (0, 0, "Large mmap allocated improperly");
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ret = EXIT_UNSUPPORTED;
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munmap ((void *) large_buf, size);
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return;
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}
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size_t bytes_move = 0x80000000 - (uintptr_t) large_buf;
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if (bytes_move + offset * sizeof (uint32_t) > size)
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{
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munmap ((void *) large_buf, size);
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return;
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}
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size_t arr_size = bytes_move / sizeof (uint32_t);
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size_t i;
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size_t repeats;
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uint32_t * src = large_buf;
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uint32_t * dst = &large_buf[offset];
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for (repeats = 0; repeats < 2; ++repeats)
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{
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FOR_EACH_IMPL (impl, 0)
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{
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for (i = 0; i < arr_size; i++)
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src[i] = (uint32_t) i;
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#ifdef TEST_BCOPY
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CALL (impl, (char *) src, (char *) dst, bytes_move);
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#else
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CALL (impl, (char *) dst, (char *) src, bytes_move);
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#endif
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for (i = 0; i < arr_size; i++)
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{
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if (dst[i] != (uint32_t) 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\" offset \"%zd\"",
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impl->name, dst, src, i);
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ret = 1;
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munmap ((void *) large_buf, size);
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return;
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}
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}
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}
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src = dst;
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dst = large_buf;
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}
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munmap ((void *) large_buf, size);
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}
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static void
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do_test3 (size_t bytes_move, size_t offset)
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{
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size_t size = bytes_move * 3;
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uint32_t *buf;
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buf = mmap (NULL, size, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANON, -1, 0);
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if (buf == MAP_FAILED)
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error (EXIT_UNSUPPORTED, errno, "mmap failed");
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size_t arr_size = bytes_move / sizeof (uint32_t);
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size_t i;
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FOR_EACH_IMPL (impl, 0)
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{
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for (i = 0; i < arr_size; i++)
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buf[i] = (uint32_t) i;
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uint32_t *dst = &buf[arr_size + offset];
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#ifdef TEST_BCOPY
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CALL (impl, (char *) buf, (char *) dst, bytes_move);
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#else
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CALL (impl, (char *) dst, (char *) buf, bytes_move);
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#endif
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for (i = 0; i < arr_size; i++)
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{
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if (dst[i] != (uint32_t) 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\" offset \"%zd\"",
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impl->name, dst, buf, i);
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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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munmap ((void *) buf, size);
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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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do_test2 (33);
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do_test2 (0x200000);
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do_test2 (0x4000000 - 1);
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do_test2 (0x4000000);
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/* Copy 16KB data. */
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do_test3 (16384, 3);
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return ret;
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}
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#include <support/test-driver.c>
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