sysdeps/pthread/tst-cancel20.c

   1 /* Copyright (C) 2003-2024 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 <errno.h>
  19 #include <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25
  26 static int fd[4];
  27 static pthread_barrier_t b;
  28 volatile int in_sh_body;
  29 unsigned long cleanups;
  30
  31 static void
  32 cl (void *arg)
  33 {
  34   cleanups = (cleanups << 4) | (long) arg;
  35 }
  36
  37
  38 static void __attribute__((noinline))
  39 sh_body (void)
  40 {
  41   char c;
  42
  43   pthread_cleanup_push (cl, (void *) 1L);
  44
  45   in_sh_body = 1;
  46   if (read (fd[2], &c, 1) == 1)
  47     {
  48       puts ("read succeeded");
  49       exit (1);
  50     }
  51
  52   pthread_cleanup_pop (0);
  53 }
  54
  55
  56 static void
  57 sh (int sig)
  58 {
  59   pthread_cleanup_push (cl, (void *) 2L);
  60   sh_body ();
  61   in_sh_body = 0;
  62
  63   pthread_cleanup_pop (0);
  64 }
  65
  66
  67 static void __attribute__((noinline))
  68 tf_body (void)
  69 {
  70   char c;
  71
  72   pthread_cleanup_push (cl, (void *) 3L);
  73
  74   int r = pthread_barrier_wait (&b);
  75   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  76     {
  77       puts ("child thread: barrier_wait failed");
  78       exit (1);
  79     }
  80
  81   if (read (fd[0], &c, 1) == 1)
  82     {
  83       puts ("read succeeded");
  84       exit (1);
  85     }
  86
  87   pthread_cleanup_pop (0);
  88 }
  89
  90
  91 static void *
  92 tf (void *arg)
  93 {
  94   pthread_cleanup_push (cl, (void *) 4L);
  95   tf_body ();
  96   pthread_cleanup_pop (0);
  97   return NULL;
  98 }
  99
 100
 101 static int
 102 do_one_test (void)
 103 {
 104   in_sh_body = 0;
 105   cleanups = 0;
 106   if (pipe (fd) != 0 || pipe (fd + 2) != 0)
 107     {
 108       puts ("pipe failed");
 109       return 1;
 110     }
 111
 112   pthread_t th;
 113   if (pthread_create (&th, NULL, tf, NULL) != 0)
 114     {
 115       puts ("create failed");
 116       return 1;
 117     }
 118
 119   int r = pthread_barrier_wait (&b);
 120   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 121     {
 122       puts ("parent thread: barrier_wait failed");
 123       return 1;
 124     }
 125
 126   sleep (1);
 127
 128   r = pthread_kill (th, SIGHUP);
 129   if (r)
 130     {
 131       errno = r;
 132       printf ("pthread_kill failed %m\n");
 133       return 1;
 134     }
 135
 136   while (in_sh_body == 0)
 137     sleep (1);
 138
 139   if (pthread_cancel (th) != 0)
 140     {
 141       puts ("cancel failed");
 142       return 1;
 143     }
 144
 145   void *ret;
 146   if (pthread_join (th, &ret) != 0)
 147     {
 148       puts ("join failed");
 149       return 1;
 150     }
 151
 152   if (ret != PTHREAD_CANCELED)
 153     {
 154       puts ("result is wrong");
 155       return 1;
 156     }
 157
 158   if (cleanups != 0x1234L)
 159     {
 160       printf ("called cleanups %lx\n", cleanups);
 161       return 1;
 162     }
 163
 164   /* The pipe closing must be issued after the cancellation handling to avoid
 165      a race condition where the cancellation runs after both pipe ends are
 166      closed.  In this case the read syscall returns EOF and the cancellation
 167      must not act.  */
 168   close (fd[0]);
 169   close (fd[1]);
 170   close (fd[2]);
 171   close (fd[3]);
 172
 173   return 0;
 174 }
 175
 176
 177 static int
 178 do_test (void)
 179 {
 180   stack_t ss;
 181   ss.ss_sp = malloc (2 * SIGSTKSZ);
 182   if (ss.ss_sp == NULL)
 183     {
 184       puts ("failed to allocate alternate stack");
 185       return 1;
 186     }
 187   ss.ss_flags = 0;
 188   ss.ss_size = 2 * SIGSTKSZ;
 189   if (sigaltstack (&ss, NULL) < 0)
 190     {
 191       printf ("sigaltstack failed %m\n");
 192       return 1;
 193     }
 194
 195   if (pthread_barrier_init (&b, NULL, 2) != 0)
 196     {
 197       puts ("barrier_init failed");
 198       return 1;
 199     }
 200
 201   struct sigaction sa;
 202   sa.sa_handler = sh;
 203   sigemptyset (&sa.sa_mask);
 204   sa.sa_flags = 0;
 205
 206   if (sigaction (SIGHUP, &sa, NULL) != 0)
 207     {
 208       puts ("sigaction failed");
 209       return 1;
 210     }
 211
 212   puts ("sa_flags = 0 test");
 213   if (do_one_test ())
 214     return 1;
 215
 216   sa.sa_handler = sh;
 217   sigemptyset (&sa.sa_mask);
 218   sa.sa_flags = SA_ONSTACK;
 219
 220   if (sigaction (SIGHUP, &sa, NULL) != 0)
 221     {
 222       puts ("sigaction failed");
 223       return 1;
 224     }
 225
 226   puts ("sa_flags = SA_ONSTACK test");
 227   if (do_one_test ())
 228     return 1;
 229
 230 #ifdef SA_SIGINFO
 231   sa.sa_sigaction = (void (*)(int, siginfo_t *, void *)) sh;
 232   sigemptyset (&sa.sa_mask);
 233   sa.sa_flags = SA_SIGINFO;
 234
 235   if (sigaction (SIGHUP, &sa, NULL) != 0)
 236     {
 237       puts ("sigaction failed");
 238       return 1;
 239     }
 240
 241   puts ("sa_flags = SA_SIGINFO test");
 242   if (do_one_test ())
 243     return 1;
 244
 245   sa.sa_sigaction = (void (*)(int, siginfo_t *, void *)) sh;
 246   sigemptyset (&sa.sa_mask);
 247   sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
 248
 249   if (sigaction (SIGHUP, &sa, NULL) != 0)
 250     {
 251       puts ("sigaction failed");
 252       return 1;
 253     }
 254
 255   puts ("sa_flags = SA_SIGINFO|SA_ONSTACK test");
 256   if (do_one_test ())
 257     return 1;
 258 #endif
 259
 260   return 0;
 261 }
 262
 263 #define TIMEOUT 40
 264 #define TEST_FUNCTION do_test ()
 265 #include "../test-skeleton.c"