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272 lines
6.8 KiB
C
272 lines
6.8 KiB
C
/* Test and measure strstr functions.
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Copyright (C) 2010-2023 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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#define TEST_NAME "strstr"
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#include "test-string.h"
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#define STRSTR c_strstr
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#define libc_hidden_builtin_def(arg) /* nothing */
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#define __strnlen strnlen
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#include "strstr.c"
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/* Naive implementation to verify results. */
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static char *
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simple_strstr (const char *s1, const char *s2)
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{
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ssize_t s1len = strlen (s1);
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ssize_t s2len = strlen (s2);
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if (s2len > s1len)
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return NULL;
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for (ssize_t i = 0; i <= s1len - s2len; ++i)
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{
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size_t j;
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for (j = 0; j < s2len; ++j)
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if (s1[i + j] != s2[j])
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break;
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if (j == s2len)
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return (char *) s1 + i;
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}
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return NULL;
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}
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typedef char *(*proto_t) (const char *, const char *);
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IMPL (c_strstr, 0)
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IMPL (strstr, 1)
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static int
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check_result (impl_t *impl, const char *s1, const char *s2,
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char *exp_result)
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{
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char *result = CALL (impl, s1, s2);
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if (result != exp_result)
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{
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error (0, 0, "Wrong result in function %s %s %s", impl->name,
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(result == NULL) ? "(null)" : result,
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(exp_result == NULL) ? "(null)" : exp_result);
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ret = 1;
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return -1;
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}
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return 0;
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}
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static void
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do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
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{
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if (check_result (impl, s1, s2, exp_result) < 0)
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return;
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}
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static void
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do_test (size_t align1, size_t align2, size_t len1, size_t len2,
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int fail)
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{
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char *s1 = (char *) (buf1 + align1);
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char *s2 = (char *) (buf2 + align2);
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static const char d[] = "1234567890abcdef";
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#define dl (sizeof (d) - 1)
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char *ss2 = s2;
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for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
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{
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size_t t = l > dl ? dl : l;
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ss2 = mempcpy (ss2, d, t);
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}
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s2[len2] = '\0';
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if (fail)
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{
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char *ss1 = s1;
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for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
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{
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size_t t = l > dl ? dl : l;
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memcpy (ss1, d, t);
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++ss1[len2 > 7 ? 7 : len2 - 1];
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ss1 += t;
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}
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}
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else
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{
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memset (s1, '0', len1);
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memcpy (s1 + len1 - len2, s2, len2);
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}
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s1[len1] = '\0';
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
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}
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static void
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check1 (void)
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{
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const char s1[] =
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"F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD_C3_A7_20_EF_BF_BD";
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const char s2[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
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char *exp_result;
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exp_result = simple_strstr (s1, s2);
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FOR_EACH_IMPL (impl, 0)
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check_result (impl, s1, s2, exp_result);
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}
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static void
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check2 (void)
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{
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const char s1_stack[] = ", enable_static, \0, enable_shared, ";
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const size_t s1_byte_count = 18;
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const char *s2_stack = &(s1_stack[s1_byte_count]);
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const size_t s2_byte_count = 18;
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char *exp_result;
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const size_t page_size_real = getpagesize ();
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/* Haystack at end of page. The following page is protected. */
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char *s1_page_end = (void *) buf1 + page_size - s1_byte_count;
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strcpy (s1_page_end, s1_stack);
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/* Haystack which crosses a page boundary.
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Note: page_size is at least 2 * getpagesize. See test_init. */
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char *s1_page_cross = (void *) buf1 + page_size_real - 8;
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strcpy (s1_page_cross, s1_stack);
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/* Needle at end of page. The following page is protected. */
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char *s2_page_end = (void *) buf2 + page_size - s2_byte_count;
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strcpy (s2_page_end, s2_stack);
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/* Needle which crosses a page boundary.
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Note: page_size is at least 2 * getpagesize. See test_init. */
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char *s2_page_cross = (void *) buf2 + page_size_real - 8;
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strcpy (s2_page_cross, s2_stack);
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exp_result = simple_strstr (s1_stack, s2_stack);
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FOR_EACH_IMPL (impl, 0)
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{
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check_result (impl, s1_stack, s2_stack, exp_result);
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check_result (impl, s1_stack, s2_page_end, exp_result);
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check_result (impl, s1_stack, s2_page_cross, exp_result);
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check_result (impl, s1_page_end, s2_stack, exp_result);
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check_result (impl, s1_page_end, s2_page_end, exp_result);
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check_result (impl, s1_page_end, s2_page_cross, exp_result);
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check_result (impl, s1_page_cross, s2_stack, exp_result);
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check_result (impl, s1_page_cross, s2_page_end, exp_result);
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check_result (impl, s1_page_cross, s2_page_cross, exp_result);
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}
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}
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#define N 1024
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static void
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pr23637 (void)
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{
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char *h = (char*) buf1;
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char *n = (char*) buf2;
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for (int i = 0; i < N; i++)
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{
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n[i] = 'x';
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h[i] = ' ';
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h[i + N] = 'x';
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}
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n[N] = '\0';
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h[N * 2] = '\0';
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/* Ensure we don't match at the first 'x'. */
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h[0] = 'x';
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char *exp_result = simple_strstr (h, n);
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FOR_EACH_IMPL (impl, 0)
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check_result (impl, h, n, exp_result);
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}
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static int
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test_main (void)
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{
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test_init ();
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check1 ();
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check2 ();
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pr23637 ();
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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 (size_t klen = 2; klen < 32; ++klen)
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for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
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{
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do_test (0, 0, hlen, klen, 0);
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do_test (0, 0, hlen, klen, 1);
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do_test (0, 3, hlen, klen, 0);
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do_test (0, 3, hlen, klen, 1);
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do_test (0, 9, hlen, klen, 0);
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do_test (0, 9, hlen, klen, 1);
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do_test (0, 15, hlen, klen, 0);
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do_test (0, 15, hlen, klen, 1);
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do_test (3, 0, hlen, klen, 0);
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do_test (3, 0, hlen, klen, 1);
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do_test (3, 3, hlen, klen, 0);
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do_test (3, 3, hlen, klen, 1);
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do_test (3, 9, hlen, klen, 0);
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do_test (3, 9, hlen, klen, 1);
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do_test (3, 15, hlen, klen, 0);
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do_test (3, 15, hlen, klen, 1);
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do_test (9, 0, hlen, klen, 0);
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do_test (9, 0, hlen, klen, 1);
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do_test (9, 3, hlen, klen, 0);
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do_test (9, 3, hlen, klen, 1);
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do_test (9, 9, hlen, klen, 0);
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do_test (9, 9, hlen, klen, 1);
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do_test (9, 15, hlen, klen, 0);
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do_test (9, 15, hlen, klen, 1);
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do_test (15, 0, hlen, klen, 0);
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do_test (15, 0, hlen, klen, 1);
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do_test (15, 3, hlen, klen, 0);
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do_test (15, 3, hlen, klen, 1);
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do_test (15, 9, hlen, klen, 0);
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do_test (15, 9, hlen, klen, 1);
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do_test (15, 15, hlen, klen, 0);
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do_test (15, 15, hlen, klen, 1);
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do_test (15, 15, hlen + klen * 4, klen * 4, 0);
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do_test (15, 15, hlen + klen * 4, klen * 4, 1);
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}
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do_test (0, 0, page_size - 1, 16, 0);
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do_test (0, 0, page_size - 1, 16, 1);
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return ret;
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}
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#include <support/test-driver.c>
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