nptl/tst-tls3mod.c

   1 /* Copyright (C) 2003-2021 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
  27
  28 extern pthread_barrier_t b;
  29
  30 #define TOTAL_SIGS 1000
  31 extern int nsigs;
  32
  33 extern sem_t s;
  34
  35
  36 static __thread void (*fp) (void);
  37
  38
  39 #define THE_SIG SIGUSR1
  40 void
  41 handler (int sig)
  42 {
  43   if (sig != THE_SIG)
  44     {
  45       write (STDOUT_FILENO, "wrong signal\n", 13);
  46       _exit (1);
  47     }
  48
  49   fp ();
  50
  51   if (sem_post (&s) != 0)
  52     {
  53       write (STDOUT_FILENO, "sem_post failed\n", 16);
  54       _exit (1);
  55     }
  56 }
  57
  58
  59 void *
  60 tf (void *arg)
  61 {
  62   if ((uintptr_t) pthread_self () & (TCB_ALIGNMENT - 1))
  63     {
  64       puts ("thread's struct pthread not aligned enough");
  65       exit (1);
  66     }
  67
  68   if (fp != NULL)
  69     {
  70       puts ("fp not initially NULL");
  71       exit (1);
  72     }
  73
  74   fp = arg;
  75
  76   pthread_barrier_wait (&b);
  77
  78   pthread_barrier_wait (&b);
  79
  80   if (nsigs != TOTAL_SIGS)
  81     {
  82       puts ("barrier_wait prematurely returns");
  83       exit (1);
  84     }
  85
  86   return NULL;
  87 }