1/* Test case for memchr inside a transactionally executing RTM region.
2 Copyright (C) 2021-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <tst-string-rtm.h>
20
21#define LOOP 3000
22#define STRING_SIZE 1024
23char string1[STRING_SIZE];
24
25__attribute__ ((noinline, noclone))
26static int
27prepare (void)
28{
29 memset (string1, 'a', STRING_SIZE);
30 string1[100] = 'c';
31 string1[STRING_SIZE - 100] = 'c';
32 char *p = memchr (string1, 'c', STRING_SIZE);
33 if (p == &string1[100])
34 return EXIT_SUCCESS;
35 else
36 return EXIT_FAILURE;
37}
38
39__attribute__ ((noinline, noclone))
40static int
41function (void)
42{
43 char *p = memchr (string1, 'c', STRING_SIZE);
44 if (p == &string1[100])
45 return 0;
46 else
47 return 1;
48}
49
50static int
51do_test (void)
52{
53 return do_test_1 (name: "memchr", LOOP, prepare, function);
54}
55

source code of glibc/sysdeps/x86/tst-memchr-rtm.c