nptl/tst-tls4modb.c

   1 /* Copyright (C) 2003-2016 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <tls.h>
  23
  24
  25 static int i;
  26 int bar;
  27
  28 static __thread void *foo [32 / sizeof (void *)]
  29   __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
  30   = { &i, &bar };
  31
  32 void
  33 test1 (void)
  34 {
  35   size_t s;
  36
  37   if (foo [0] != &i || foo [1] != &bar)
  38     abort ();
  39
  40   foo [0] = NULL;
  41   foo [1] = NULL;
  42   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
  43     {
  44       if (foo [s])
  45         abort ();
  46       foo [s] = &foo[s];
  47     }
  48 }
  49
  50 void
  51 test2 (void)
  52 {
  53   size_t s;
  54
  55   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
  56     {
  57       if (foo [s] != &foo [s])
  58         abort ();
  59       foo [s] = &foo [s ^ 1];
  60     }
  61 }