nptl/tst-tls3mod.c

   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 <pthread.h>
  19 #include <semaphore.h>
  20 #include <signal.h>
  21 #include <stdint.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <pthreaddef.h>
  26 #include <descr.h>
  27
  28 #include <support/xunistd.h>
  29
  30 extern pthread_barrier_t b;
  31
  32 #define TOTAL_SIGS 1000
  33 extern int nsigs;
  34
  35 extern sem_t s;
  36
  37
  38 static __thread void (*fp) (void);
  39
  40
  41 #define THE_SIG SIGUSR1
  42 void
  43 handler (int sig)
  44 {
  45   if (sig != THE_SIG)
  46     {
  47       xwrite (STDOUT_FILENO, "wrong signal\n", 13);
  48       _exit (1);
  49     }
  50
  51   fp ();
  52
  53   if (sem_post (&s) != 0)
  54     {
  55       xwrite (STDOUT_FILENO, "sem_post failed\n", 16);
  56       _exit (1);
  57     }
  58 }
  59
  60
  61 void *
  62 tf (void *arg)
  63 {
  64   if ((uintptr_t) pthread_self () & (TCB_ALIGNMENT - 1))
  65     {
  66       puts ("thread's struct pthread not aligned enough");
  67       exit (1);
  68     }
  69
  70   if (fp != NULL)
  71     {
  72       puts ("fp not initially NULL");
  73       exit (1);
  74     }
  75
  76   fp = arg;
  77
  78   pthread_barrier_wait (&b);
  79
  80   pthread_barrier_wait (&b);
  81
  82   if (nsigs != TOTAL_SIGS)
  83     {
  84       puts ("barrier_wait prematurely returns");
  85       exit (1);
  86     }
  87
  88   return NULL;
  89 }