nptl/tst-signal6.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 <signal.h>
  21 #include <stdint.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26
  27 #ifdef SIGRTMIN
  28
  29 # define N 2
  30 static pthread_barrier_t bar;
  31 static struct
  32 {
  33   void *p;
  34   pthread_t s;
  35 } ti[N];
  36 static int sig1;
  37
  38
  39 static void
  40 handler (int sig)
  41 {
  42   pthread_t self = pthread_self ();
  43   size_t i;
  44
  45   for (i = 0; i < N; ++i)
  46     if (ti[i].s == self)
  47       {
  48         if ((uintptr_t) ti[i].p <= (uintptr_t) &self
  49             && (uintptr_t) ti[i].p + 2 * MINSIGSTKSZ > (uintptr_t) &self)
  50           {
  51             puts ("alt stack not used");
  52             exit (1);
  53           }
  54
  55         printf ("thread %zu used alt stack for signal %d\n", i, sig);
  56
  57         return;
  58       }
  59
  60   puts ("handler: thread not found");
  61   exit (1);
  62 }
  63
  64
  65 static void *
  66 tf (void *arg)
  67 {
  68   size_t nr = (uintptr_t) arg;
  69   if (nr >= N)
  70     {
  71       puts ("wrong nr parameter");
  72       exit (1);
  73     }
  74
  75   sigset_t ss;
  76   sigemptyset (&ss);
  77   size_t i;
  78   for (i = 0; i < N; ++i)
  79     if (i != nr)
  80       if (sigaddset (&ss, sig1 + i) != 0)
  81         {
  82           puts ("tf: sigaddset failed");
  83           exit (1);
  84         }
  85   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
  86     {
  87       puts ("tf: sigmask failed");
  88       exit (1);
  89     }
  90
  91   void *p = malloc (2 * MINSIGSTKSZ);
  92   if (p == NULL)
  93     {
  94       puts ("tf: malloc failed");
  95       exit (1);
  96     }
  97
  98   stack_t s;
  99   s.ss_sp = p;
 100   s.ss_size = 2 * MINSIGSTKSZ;
 101   s.ss_flags = 0;
 102   if (sigaltstack (&s, NULL) != 0)
 103     {
 104       puts ("tf: sigaltstack failed");
 105       exit (1);
 106     }
 107
 108   ti[nr].p = p;
 109   ti[nr].s = pthread_self ();
 110
 111   pthread_barrier_wait (&bar);
 112
 113   pthread_barrier_wait (&bar);
 114
 115   return NULL;
 116 }
 117
 118
 119 static int
 120 do_test (void)
 121 {
 122   sig1 = SIGRTMIN;
 123   if (sig1 + N > SIGRTMAX)
 124     {
 125       puts ("too few RT signals");
 126       return 0;
 127     }
 128
 129   struct sigaction sa;
 130   sa.sa_handler = handler;
 131   sa.sa_flags = 0;
 132   sigemptyset (&sa.sa_mask);
 133
 134   if (sigaction (sig1, &sa, NULL) != 0
 135       || sigaction (sig1 + 1, &sa, NULL) != 0
 136       || sigaction (sig1 + 2, &sa, NULL) != 0)
 137     {
 138       puts ("sigaction failed");
 139       return 1;
 140     }
 141
 142   if (pthread_barrier_init (&bar, NULL, 1 + N) != 0)
 143     {
 144       puts ("barrier_init failed");
 145       return 1;
 146     }
 147
 148   pthread_t th[N];
 149   size_t i;
 150   for (i = 0; i < N; ++i)
 151     if (pthread_create (&th[i], NULL, tf, (void *) (long int) i) != 0)
 152       {
 153         puts ("create failed");
 154         return 1;
 155       }
 156
 157   /* Block the three signals.  */
 158   sigset_t ss;
 159   sigemptyset (&ss);
 160   for (i = 0; i <= N; ++i)
 161     sigaddset (&ss, sig1 + i);
 162   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
 163     {
 164       puts ("main: sigmask failed");
 165       return 1;
 166     }
 167
 168   pthread_barrier_wait (&bar);
 169
 170   /* Send some signals.  */
 171   pid_t me = getpid ();
 172   kill (me, sig1 + N);
 173   for (i = 0; i < N; ++i)
 174     kill (me, sig1 + i);
 175   kill (me, sig1 + N);
 176
 177   /* Give the signals a chance to be worked on.  */
 178   sleep (1);
 179
 180   pthread_barrier_wait (&bar);
 181
 182   for (i = 0; i < N; ++i)
 183     if (pthread_join (th[i], NULL) != 0)
 184       {
 185         puts ("join failed");
 186         return 1;
 187       }
 188
 189   return 0;
 190 }
 191
 192 # define TEST_FUNCTION do_test ()
 193
 194 #else
 195 # define TEST_FUNCTION 0
 196 #endif
 197 #include "../test-skeleton.c"