nptl/tst-tls4modb.c

   1 /* Copyright (C) 2003 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <tls.h>
  24
  25 #if HAVE___THREAD && defined HAVE_TLS_MODEL_ATTRIBUTE
  26
  27 static int i;
  28 int bar;
  29
  30 static __thread void *foo [32 / sizeof (void *)]
  31   __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
  32   = { &i, &bar };
  33
  34 void
  35 test1 (void)
  36 {
  37   size_t s;
  38
  39   if (foo [0] != &i || foo [1] != &bar)
  40     abort ();
  41
  42   foo [0] = NULL;
  43   foo [1] = NULL;
  44   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
  45     {
  46       if (foo [s])
  47         abort ();
  48       foo [s] = &foo[s];
  49     }
  50 }
  51
  52 void
  53 test2 (void)
  54 {
  55   size_t s;
  56
  57   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
  58     {
  59       if (foo [s] != &foo [s])
  60         abort ();
  61       foo [s] = &foo [s ^ 1];
  62     }
  63 }
  64
  65 #endif