nptl/tst-signal6.c

   1 /* Copyright (C) 2003 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 <signal.h>
  22 #include <stdint.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26
  27
  28 #define N 2
  29 static pthread_barrier_t bar;
  30 static struct
  31 {
  32   void *p;
  33   pthread_t s;
  34 } ti[N];
  35 static int sig1;
  36
  37
  38 static void
  39 handler (int sig)
  40 {
  41   pthread_t self = pthread_self ();
  42   size_t i;
  43
  44   for (i = 0; i < N; ++i)
  45     if (ti[i].s == self)
  46       {
  47         if ((uintptr_t) ti[i].p <= (uintptr_t) &self
  48             && (uintptr_t) ti[i].p + 2 * MINSIGSTKSZ > (uintptr_t) &self)
  49           {
  50             puts ("alt stack not used");
  51             exit (1);
  52           }
  53
  54         printf ("thread %zu used alt stack for signal %d\n", i, sig);
  55
  56         return;
  57       }
  58
  59   puts ("handler: thread not found");
  60   exit (1);
  61 }
  62
  63
  64 static void *
  65 tf (void *arg)
  66 {
  67   size_t nr = (uintptr_t) arg;
  68   if (nr >= N)
  69     {
  70       puts ("wrong nr parameter");
  71       exit (1);
  72     }
  73
  74   sigset_t ss;
  75   sigemptyset (&ss);
  76   size_t i;
  77   for (i = 0; i < N; ++i)
  78     if (i != nr)
  79       if (sigaddset (&ss, sig1 + i) != 0)
  80         {
  81           puts ("tf: sigaddset failed");
  82           exit (1);
  83         }
  84   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
  85     {
  86       puts ("tf: sigmask failed");
  87       exit (1);
  88     }
  89
  90   void *p = malloc (2 * MINSIGSTKSZ);
  91   if (p == NULL)
  92     {
  93       puts ("tf: malloc failed");
  94       exit (1);
  95     }
  96
  97   stack_t s;
  98   s.ss_sp = p;
  99   s.ss_size = 2 * MINSIGSTKSZ;
 100   s.ss_flags = 0;
 101   if (sigaltstack (&s, NULL) != 0)
 102     {
 103       puts ("tf: sigaltstack failed");
 104       exit (1);
 105     }
 106
 107   ti[nr].p = p;
 108   ti[nr].s = pthread_self ();
 109
 110   pthread_barrier_wait (&bar);
 111
 112   pthread_barrier_wait (&bar);
 113
 114   return NULL;
 115 }
 116
 117
 118 static int
 119 do_test (void)
 120 {
 121   sig1 = SIGRTMIN;
 122   if (sig1 + N > SIGRTMAX)
 123     {
 124       puts ("too few RT signals");
 125       return 0;
 126     }
 127
 128   struct sigaction sa;
 129   sa.sa_handler = handler;
 130   sa.sa_flags = 0;
 131   sigemptyset (&sa.sa_mask);
 132
 133   if (sigaction (sig1, &sa, NULL) != 0
 134       || sigaction (sig1 + 1, &sa, NULL) != 0
 135       || sigaction (sig1 + 2, &sa, NULL) != 0)
 136     {
 137       puts ("sigaction failed");
 138       return 1;
 139     }
 140
 141   if (pthread_barrier_init (&bar, NULL, 1 + N) != 0)
 142     {
 143       puts ("barrier_init failed");
 144       return 1;
 145     }
 146
 147   pthread_t th[N];
 148   size_t i;
 149   for (i = 0; i < N; ++i)
 150     if (pthread_create (&th[i], NULL, tf, (void *) (long int) i) != 0)
 151       {
 152         puts ("create failed");
 153         return 1;
 154       }
 155
 156   /* Block the three signals.  */
 157   sigset_t ss;
 158   sigemptyset (&ss);
 159   for (i = 0; i <= N; ++i)
 160     sigaddset (&ss, sig1 + i);
 161   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
 162     {
 163       puts ("main: sigmask failed");
 164       return 1;
 165     }
 166
 167   pthread_barrier_wait (&bar);
 168
 169   /* Send some signals.  */
 170   pid_t me = getpid ();
 171   kill (me, sig1 + N);
 172   for (i = 0; i < N; ++i)
 173     kill (me, sig1 + i);
 174   kill (me, sig1 + N);
 175
 176   /* Give the signals a chance to be worked on.  */
 177   sleep (1);
 178
 179   pthread_barrier_wait (&bar);
 180
 181   for (i = 0; i < N; ++i)
 182     if (pthread_join (th[i], NULL) != 0)
 183       {
 184         puts ("join failed");
 185         return 1;
 186       }
 187
 188   return 0;
 189 }
 190
 191 #define TEST_FUNCTION do_test ()
 192 #include "../test-skeleton.c"