nptl/tst-tls1.c

   1 /* Copyright (C) 2003, 2004, 2011 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@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 <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24
  25 struct test_s
  26 {
  27   int a;
  28   int b;
  29 };
  30
  31 #define INIT_A 1
  32 #define INIT_B 42
  33 /* Deliberately not static.  */
  34 __thread struct test_s s __attribute__ ((tls_model ("initial-exec"))) =
  35 {
  36   .a = INIT_A,
  37   .b = INIT_B
  38 };
  39
  40
  41 static void *
  42 tf (void *arg)
  43 {
  44   if (s.a != INIT_A || s.b != INIT_B)
  45     {
  46       puts ("initial value of s in child thread wrong");
  47       exit (1);
  48     }
  49
  50   ++s.a;
  51
  52   return NULL;
  53 }
  54
  55
  56 int
  57 do_test (void)
  58 {
  59   if (s.a != INIT_A || s.b != INIT_B)
  60     {
  61       puts ("initial value of s in main thread wrong");
  62       exit (1);
  63     }
  64
  65   pthread_attr_t a;
  66
  67   if (pthread_attr_init (&a) != 0)
  68     {
  69       puts ("attr_init failed");
  70       exit (1);
  71     }
  72
  73   if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0)
  74     {
  75       puts ("attr_setstacksize failed");
  76       return 1;
  77     }
  78
  79 #define N 10
  80   int i;
  81   for (i = 0; i < N; ++i)
  82     {
  83 #define M 10
  84       pthread_t th[M];
  85       int j;
  86       for (j = 0; j < M; ++j, ++s.a)
  87         if (pthread_create (&th[j], &a, tf, NULL) != 0)
  88           {
  89             puts ("pthread_create failed");
  90             exit (1);
  91           }
  92
  93       for (j = 0; j < M; ++j)
  94         if (pthread_join (th[j], NULL) != 0)
  95           {
  96             puts ("pthread_join failed");
  97             exit (1);
  98           }
  99     }
 100
 101   if (pthread_attr_destroy (&a) != 0)
 102     {
 103       puts ("attr_destroy failed");
 104       exit (1);
 105     }
 106
 107   return 0;
 108 }
 109
 110
 111 #define TEST_FUNCTION do_test ()
 112 #include "../test-skeleton.c"