1 /* Copyright (C) 2003-2022 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 
21 static int i;
22 int bar;
23 
24 static __thread void *foo [32 / sizeof (void *)]
25   __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
26   = { &i, &bar };
27 
28 void
test1(void)29 test1 (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 
46 void
test2(void)47 test2 (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