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glibc  2.9
tst-tls4modb.c
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00001 /* Copyright (C) 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <stdio.h>
00021 #include <stdlib.h>
00022 #include <unistd.h>
00023 #include <tls.h>
00024 
00025 #if HAVE___THREAD && defined HAVE_TLS_MODEL_ATTRIBUTE
00026 
00027 static int i;
00028 int bar;
00029 
00030 static __thread void *foo [32 / sizeof (void *)]
00031   __attribute__ ((tls_model ("initial-exec"), aligned (sizeof (void *))))
00032   = { &i, &bar };
00033 
00034 void
00035 test1 (void)
00036 {
00037   size_t s;
00038 
00039   if (foo [0] != &i || foo [1] != &bar)
00040     abort ();
00041 
00042   foo [0] = NULL;
00043   foo [1] = NULL;
00044   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
00045     {
00046       if (foo [s])
00047         abort ();
00048       foo [s] = &foo[s];
00049     }
00050 }
00051 
00052 void
00053 test2 (void)
00054 {
00055   size_t s;
00056 
00057   for (s = 0; s < sizeof (foo) / sizeof (void *); ++s)
00058     {
00059       if (foo [s] != &foo [s])
00060         abort ();
00061       foo [s] = &foo [s ^ 1];
00062     }
00063 }
00064 
00065 #endif