sysdeps/pthread/tst-cancel21.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 <errno.h>
  19 #include <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <sys/wait.h>
  24 #include <unistd.h>
  25
  26
  27 static int fd[4];
  28 static pthread_barrier_t b;
  29 volatile int in_sh_body;
  30 unsigned long cleanups;
  31
  32 static void
  33 cl (void *arg)
  34 {
  35   cleanups = (cleanups << 4) | (long) arg;
  36 }
  37
  38
  39 static void __attribute__((noinline))
  40 sh_body (void)
  41 {
  42   char c;
  43
  44   pthread_cleanup_push (cl, (void *) 1L);
  45
  46   in_sh_body = 1;
  47   if (read (fd[2], &c, 1) == 1)
  48     {
  49       puts ("read succeeded");
  50       exit (1);
  51     }
  52
  53   pthread_cleanup_pop (0);
  54 }
  55
  56
  57 static void
  58 sh (int sig)
  59 {
  60   pthread_cleanup_push (cl, (void *) 2L);
  61   sh_body ();
  62   in_sh_body = 0;
  63
  64   pthread_cleanup_pop (0);
  65 }
  66
  67
  68 static void __attribute__((noinline))
  69 tf_body (void)
  70 {
  71   char c;
  72
  73   pthread_cleanup_push (cl, (void *) 3L);
  74
  75   int r = pthread_barrier_wait (&b);
  76   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  77     {
  78       puts ("child thread: barrier_wait failed");
  79       exit (1);
  80     }
  81
  82   if (read (fd[0], &c, 1) == 1)
  83     {
  84       puts ("read succeeded");
  85       exit (1);
  86     }
  87
  88   pthread_cleanup_pop (0);
  89 }
  90
  91
  92 static void *
  93 tf (void *arg)
  94 {
  95   pthread_t th = (pthread_t) arg;
  96
  97   int r = pthread_barrier_wait (&b);
  98   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  99     {
 100       puts ("parent thread: barrier_wait failed");
 101       exit (1);
 102     }
 103
 104   sleep (1);
 105
 106   r = pthread_kill (th, SIGHUP);
 107   if (r)
 108     {
 109       errno = r;
 110       printf ("pthread_kill failed %m\n");
 111       exit (1);
 112     }
 113
 114   while (in_sh_body == 0)
 115     sleep (1);
 116
 117   if (pthread_cancel (th) != 0)
 118     {
 119       puts ("cancel failed");
 120       exit (1);
 121     }
 122
 123   void *ret;
 124   if (pthread_join (th, &ret) != 0)
 125     {
 126       puts ("join failed");
 127       exit (1);
 128     }
 129
 130   if (ret != PTHREAD_CANCELED)
 131     {
 132       puts ("result is wrong");
 133       exit (1);
 134     }
 135
 136   if (cleanups != 0x1234L)
 137     {
 138       printf ("called cleanups %lx\n", cleanups);
 139       exit (1);
 140     }
 141
 142   if (pthread_barrier_destroy (&b))
 143     {
 144       puts ("barrier destroy failed");
 145       exit (1);
 146     }
 147
 148   /* The pipe closing must be issued after the cancellation handling to avoid
 149      a race condition where the cancellation runs after both pipe ends are
 150      closed.  In this case the read syscall returns EOF and the cancellation
 151      must not act.  */
 152   close (fd[0]);
 153   close (fd[1]);
 154   close (fd[2]);
 155   close (fd[3]);
 156
 157   exit (0);
 158 }
 159
 160
 161 static int
 162 do_one_test (void)
 163 {
 164   in_sh_body = 0;
 165
 166   pid_t pid = fork ();
 167
 168   if (pid == -1)
 169     {
 170       printf ("fork failed: %m\n");
 171       return 1;
 172     }
 173
 174   if (pid)
 175     {
 176       int status;
 177       if (waitpid (pid, &status, 0) < 0)
 178         {
 179           printf ("waitpid failed %m\n");
 180           return 1;
 181         }
 182
 183       return !WIFEXITED (status) || WEXITSTATUS (status);
 184     }
 185
 186   if (pthread_barrier_init (&b, NULL, 2) != 0)
 187     {
 188       puts ("barrier_init failed");
 189       exit (1);
 190     }
 191
 192   cleanups = 0;
 193   if (pipe (fd) != 0 || pipe (fd + 2) != 0)
 194     {
 195       puts ("pipe failed");
 196       exit (1);
 197     }
 198
 199   pthread_t th;
 200   if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0)
 201     {
 202       puts ("create failed");
 203       exit (1);
 204     }
 205
 206   pthread_cleanup_push (cl, (void *) 4L);
 207   tf_body ();
 208   pthread_cleanup_pop (0);
 209   exit (1);
 210 }
 211
 212
 213 static int
 214 do_test (void)
 215 {
 216   stack_t ss;
 217   ss.ss_sp = malloc (2 * SIGSTKSZ);
 218   if (ss.ss_sp == NULL)
 219     {
 220       puts ("failed to allocate alternate stack");
 221       return 1;
 222     }
 223   ss.ss_flags = 0;
 224   ss.ss_size = 2 * SIGSTKSZ;
 225   if (sigaltstack (&ss, NULL) < 0)
 226     {
 227       printf ("sigaltstack failed %m\n");
 228       return 1;
 229     }
 230
 231   struct sigaction sa;
 232   sa.sa_handler = sh;
 233   sigemptyset (&sa.sa_mask);
 234   sa.sa_flags = 0;
 235
 236   if (sigaction (SIGHUP, &sa, NULL) != 0)
 237     {
 238       puts ("sigaction failed");
 239       return 1;
 240     }
 241
 242   puts ("sa_flags = 0 test");
 243   if (do_one_test ())
 244     return 1;
 245
 246   sa.sa_handler = sh;
 247   sigemptyset (&sa.sa_mask);
 248   sa.sa_flags = SA_ONSTACK;
 249
 250   if (sigaction (SIGHUP, &sa, NULL) != 0)
 251     {
 252       puts ("sigaction failed");
 253       return 1;
 254     }
 255
 256   puts ("sa_flags = SA_ONSTACK test");
 257   if (do_one_test ())
 258     return 1;
 259
 260 #ifdef SA_SIGINFO
 261   sa.sa_sigaction = (void (*)(int, siginfo_t *, void *)) sh;
 262   sigemptyset (&sa.sa_mask);
 263   sa.sa_flags = SA_SIGINFO;
 264
 265   if (sigaction (SIGHUP, &sa, NULL) != 0)
 266     {
 267       puts ("sigaction failed");
 268       return 1;
 269     }
 270
 271   puts ("sa_flags = SA_SIGINFO test");
 272   if (do_one_test ())
 273     return 1;
 274
 275   sa.sa_sigaction = (void (*)(int, siginfo_t *, void *)) sh;
 276   sigemptyset (&sa.sa_mask);
 277   sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
 278
 279   if (sigaction (SIGHUP, &sa, NULL) != 0)
 280     {
 281       puts ("sigaction failed");
 282       return 1;
 283     }
 284
 285   puts ("sa_flags = SA_SIGINFO|SA_ONSTACK test");
 286   if (do_one_test ())
 287     return 1;
 288 #endif
 289
 290   return 0;
 291 }
 292
 293 #define TIMEOUT 40
 294 #define TEST_FUNCTION do_test ()
 295 #include "../test-skeleton.c"