1/* Verify that TLS access in separate thread in a dlopened library does not
2 deadlock - the module.
3 Copyright (C) 2015-2024 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <pthread.h>
24#include <atomic.h>
25
26static pthread_t th;
27static int running = 1;
28
29static void *
30test_run (void *p)
31{
32 while (atomic_load_relaxed (&running))
33 printf (format: "Test running\n");
34 printf (format: "Test finished\n");
35 return NULL;
36}
37
38static void __attribute__ ((constructor))
39do_init (void)
40{
41 int ret = pthread_create (newthread: &th, NULL, start_routine: test_run, NULL);
42
43 if (ret != 0)
44 {
45 printf (format: "failed to create thread: %s (%d)\n", strerror (errnum: ret), ret);
46 exit (1);
47 }
48}
49
50static void __attribute__ ((destructor))
51do_end (void)
52{
53 atomic_store_relaxed (&running, 0);
54 int ret = pthread_join (th: th, NULL);
55
56 if (ret != 0)
57 {
58 printf (format: "pthread_join: %s(%d)\n", strerror (errnum: ret), ret);
59 exit (1);
60 }
61
62 printf (format: "Thread joined\n");
63}
64

source code of glibc/sysdeps/pthread/tst-join7mod.c