nptl/tst-thread-setspecific.c

   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
  30 int do_test (void)
  31 {
  32   void *p = malloc (1);   /* Deliberately uninitialized.  */
  33   pthread_setspecific (pthread_self (), p);
  34
  35   void *q = pthread_getspecific (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"