1  /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stddef.h>
      19  #include <stdlib.h>
      20  
      21  static int i;
      22  int bar;
      23  
      24  static __thread void *foo [32 / sizeof (void *)]
      25    __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
      26    = { &i, &bar };
      27  
      28  void
      29  test1 (void)
      30  {
      31    size_t s;
      32  
      33    if (foo [0] != &i || foo [1] != &bar)
      34      abort ();
      35  
      36    foo [0] = NULL;
      37    foo [1] = NULL;
      38    for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
      39      {
      40        if (foo [s])
      41  	abort ();
      42        foo [s] = &foo[s];
      43      }
      44  }
      45  
      46  void
      47  test2 (void)
      48  {
      49    size_t s;
      50  
      51    for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
      52      {
      53        if (foo [s] != &foo [s])
      54  	abort ();
      55        foo [s] = &foo [s ^ 1];
      56      }
      57  }