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229 lines
5.9 KiB
C
229 lines
5.9 KiB
C
/* Test and measure 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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/* test-memcpy-support.h contains all test functions. */
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#include "test-memcpy-support.h"
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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, j, n, align1, align2, len, size1, size2, size;
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int c;
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unsigned char *p1, *p2;
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unsigned char *res;
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for (n = 0; n < ITERATIONS; n++)
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{
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if (n == 0)
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{
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len = getpagesize ();
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size = len + 512;
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size1 = size;
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size2 = size;
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align1 = 512;
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align2 = 512;
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}
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else
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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 = 768;
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if (size > page_size)
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size = page_size;
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size1 = size;
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size2 = size;
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i = random ();
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if (i & 3)
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size -= 256;
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if (i & 1)
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size1 -= 256;
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if (i & 2)
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size2 -= 256;
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if (i & 4)
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{
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len = random () % size;
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align1 = size1 - len - (random () & 31);
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align2 = size2 - len - (random () & 31);
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if (align1 > size1)
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align1 = 0;
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if (align2 > size2)
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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 () & 63;
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align2 = random () & 63;
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len = random () % size;
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if (align1 + len > size1)
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align1 = size1 - len;
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if (align2 + len > size2)
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align2 = size2 - len;
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}
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}
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p1 = buf1 + page_size - size1;
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p2 = buf2 + page_size - size2;
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c = random () & 255;
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j = align1 + len + 256;
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if (j > size1)
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j = size1;
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for (i = 0; i < j; ++i)
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p1[i] = random () & 255;
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FOR_EACH_IMPL (impl, 1)
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{
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j = align2 + len + 256;
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if (j > size2)
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j = size2;
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memset (p2, c, j);
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res = (unsigned char *)CALL (impl, (char *)(p2 + align2),
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(char *)(p1 + align1), len);
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if (res != MEMCPY_RESULT (p2 + align2, len))
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{
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error (0, 0,
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"Iteration %zd - wrong result in function %s (%zd, %zd, "
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"%zd) %p != %p",
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n, impl->name, align1, align2, len, res,
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MEMCPY_RESULT (p2 + align2, len));
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ret = 1;
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}
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for (i = 0; i < align2; ++i)
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{
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if (p2[i] != c)
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{
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error (0, 0,
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"Iteration %zd - garbage before, %s (%zd, %zd, %zd)", n,
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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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for (i = align2 + len; i < j; ++i)
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{
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if (p2[i] != c)
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{
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error (0, 0,
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"Iteration %zd - garbage after, %s (%zd, %zd, %zd)", n,
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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 (memcmp (p1 + align1, p2 + align2, len))
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{
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error (0, 0,
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"Iteration %zd - different strings, %s (%zd, %zd, %zd)", n,
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impl->name, align1, align2, len);
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ret = 1;
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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, j;
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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 < 18; ++i)
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{
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do_test (0, 0, 1 << i);
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do_test (i, 0, 1 << i);
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do_test (0, i, 1 << i);
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do_test (i, i, 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, 0, i);
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do_test (i, 0, i);
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do_test (0, i, i);
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do_test (i, i, 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, 0, 16 * i);
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do_test (i, 0, 16 * i);
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do_test (0, i, 16 * i);
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do_test (i, i, 16 * i);
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}
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for (i = 19; i <= 25; ++i)
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{
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do_test (255, 0, 1 << i);
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do_test (0, 4000, 1 << i);
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do_test (0, 255, i);
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do_test (0, 4000, i);
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}
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do_test (0, 0, getpagesize ());
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do_random_tests ();
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do_test1 (0, 0, 0x100000);
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do_test1 (0, 0, 0x2000000);
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for (i = 4096; i < 32768; i += 4096)
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{
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for (j = 1; j <= 1024; j <<= 1)
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{
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do_test1 (0, j, i);
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do_test1 (4095, j, i);
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do_test1 (4096 - j, 0, i);
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do_test1 (0, j - 1, i);
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do_test1 (4095, j - 1, i);
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do_test1 (4096 - j - 1, 0, i);
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do_test1 (0, j + 1, i);
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do_test1 (4095, j + 1, i);
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do_test1 (4096 - j, 1, i);
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}
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}
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for (i = 0x300000; i < 0x2000000; i += 0x235689)
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{
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for (j = 64; j <= 1024; j <<= 1)
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{
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do_test1 (0, j, i);
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do_test1 (4095, j, i);
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do_test1 (4096 - j, 0, i);
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do_test1 (0, j - 1, i);
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do_test1 (4095, j - 1, i);
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do_test1 (4096 - j - 1, 0, i);
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do_test1 (0, j + 1, i);
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do_test1 (4095, j + 1, i);
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do_test1 (4096 - j, 1, i);
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}
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}
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return ret;
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}
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#include <support/test-driver.c>
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