1/* Copyright (C) 2003-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <stddef.h>
19#include <stdlib.h>
20
21static int i;
22int bar;
23
24static __thread void *foo [32 / sizeof (void *)]
25 __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
26 = { &i, &bar };
27
28void
29test1 (void)
30{
31 size_t s;
32
33 if (foo [0] != &i || foo [1] != &bar)
34 abort ();
35
36 foo [0] = NULL;
37 foo [1] = NULL;
38 for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
39 {
40 if (foo [s])
41 abort ();
42 foo [s] = &foo[s];
43 }
44}
45
46void
47test2 (void)
48{
49 size_t s;
50
51 for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
52 {
53 if (foo [s] != &foo [s])
54 abort ();
55 foo [s] = &foo [s ^ 1];
56 }
57}
58

source code of glibc/sysdeps/pthread/tst-tls4modb.c