sysdeps/pthread/tst-tls4modb.c

   1 /* Copyright (C) 2003-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stddef.h>
  20 #include <stdlib.h>
  21
  22 static int i;
  23 int bar;
  24
  25 static __thread void *foo [32 / sizeof (void *)]
  26   __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
  27   = { &i, &bar };
  28
  29 void
  30 test1 (void)
  31 {
  32   size_t s;
  33
  34   if (foo [0] != &i || foo [1] != &bar)
  35     abort ();
  36
  37   foo [0] = NULL;
  38   foo [1] = NULL;
  39   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
  40     {
  41       if (foo [s])
  42         abort ();
  43       foo [s] = &foo[s];
  44     }
  45 }
  46
  47 void
  48 test2 (void)
  49 {
  50   size_t s;
  51
  52   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
  53     {
  54       if (foo [s] != &foo [s])
  55         abort ();
  56       foo [s] = &foo [s ^ 1];
  57     }
  58 }