1/* Test to verify that passing a pointer to an uninitialized object
2 to pthread_setspecific doesn't trigger bogus uninitialized warnings.
3 Copyright (C) 2021-2022 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 <pthread.h>
21#include <stdlib.h>
22
23/* Turn uninitialized warnings into errors to detect the problem.
24 See BZ #27714. */
25
26#pragma GCC diagnostic push
27#pragma GCC diagnostic error "-Wmaybe-uninitialized"
28#pragma GCC diagnostic error "-Wuninitialized"
29
30int do_test (void)
31{
32 void *p = malloc (size: 1); /* Deliberately uninitialized. */
33 pthread_setspecific (key: pthread_self (), pointer: p);
34
35 void *q = pthread_getspecific (key: pthread_self ());
36
37 return p == q;
38}
39
40#pragma GCC diagnostic pop
41
42#define TEST_FUNCTION do_test ()
43#include "../test-skeleton.c"
44

source code of glibc/nptl/tst-thread-setspecific.c