nptl/tst-tls1.c

   1 /* Copyright (C) 2003-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23
  24 struct test_s
  25 {
  26   int a;
  27   int b;
  28 };
  29
  30 #define INIT_A 1
  31 #define INIT_B 42
  32 /* Deliberately not static.  */
  33 __thread struct test_s s __attribute__ ((tls_model ("initial-exec"))) =
  34 {
  35   .a = INIT_A,
  36   .b = INIT_B
  37 };
  38
  39
  40 static void *
  41 tf (void *arg)
  42 {
  43   if (s.a != INIT_A || s.b != INIT_B)
  44     {
  45       puts ("initial value of s in child thread wrong");
  46       exit (1);
  47     }
  48
  49   ++s.a;
  50
  51   return NULL;
  52 }
  53
  54
  55 int
  56 do_test (void)
  57 {
  58   if (s.a != INIT_A || s.b != INIT_B)
  59     {
  60       puts ("initial value of s in main thread wrong");
  61       exit (1);
  62     }
  63
  64   pthread_attr_t a;
  65
  66   if (pthread_attr_init (&a) != 0)
  67     {
  68       puts ("attr_init failed");
  69       exit (1);
  70     }
  71
  72   if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0)
  73     {
  74       puts ("attr_setstacksize failed");
  75       return 1;
  76     }
  77
  78 #define N 10
  79   int i;
  80   for (i = 0; i < N; ++i)
  81     {
  82 #define M 10
  83       pthread_t th[M];
  84       int j;
  85       for (j = 0; j < M; ++j, ++s.a)
  86         if (pthread_create (&th[j], &a, tf, NULL) != 0)
  87           {
  88             puts ("pthread_create failed");
  89             exit (1);
  90           }
  91
  92       for (j = 0; j < M; ++j)
  93         if (pthread_join (th[j], NULL) != 0)
  94           {
  95             puts ("pthread_join failed");
  96             exit (1);
  97           }
  98     }
  99
 100   if (pthread_attr_destroy (&a) != 0)
 101     {
 102       puts ("attr_destroy failed");
 103       exit (1);
 104     }
 105
 106   return 0;
 107 }
 108
 109
 110 #define TEST_FUNCTION do_test ()
 111 #include "../test-skeleton.c"