sysdeps/pthread/tst-tsd6.c

   1 #include <errno.h>
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <sys/wait.h>
   7
   8 #define NKEYS 100
   9 static pthread_key_t keys[NKEYS];
  10 static pthread_barrier_t b;
  11
  12
  13 static void *
  14 tf (void *arg)
  15 {
  16   void *res = NULL;
  17   for (int i = 0; i < NKEYS; ++i)
  18     {
  19       void *p = pthread_getspecific (keys[i]);
  20       /* Use an arbitrary but valid pointer as the value.  */
  21       pthread_setspecific (keys[i], (void *) keys);
  22       if (p != NULL)
  23         res = p;
  24     }
  25   if (arg != NULL)
  26     {
  27       pthread_barrier_wait (arg);
  28       pthread_barrier_wait (arg);
  29     }
  30   return res;
  31 }
  32
  33
  34 static int
  35 do_test (void)
  36 {
  37   pthread_barrier_init (&b, NULL, 2);
  38
  39   for (int i = 0; i < NKEYS; ++i)
  40     if (pthread_key_create (&keys[i], NULL) != 0)
  41       {
  42         puts ("cannot create keys");
  43         return 1;
  44       }
  45
  46   pthread_t th;
  47   if (pthread_create (&th, NULL, tf, &b) != 0)
  48     {
  49       puts ("cannot create thread in parent");
  50       return 1;
  51     }
  52
  53   pthread_barrier_wait (&b);
  54
  55   pid_t pid = fork ();
  56   if (pid == 0)
  57     {
  58       if (pthread_create (&th, NULL, tf, NULL) != 0)
  59         {
  60           puts ("cannot create thread in child");
  61           exit (1);
  62         }
  63
  64       void *res;
  65       pthread_join (th, &res);
  66
  67       exit (res != NULL);
  68     }
  69   else if (pid == -1)
  70     {
  71       puts ("cannot create child process");
  72       return 1;
  73     }
  74
  75   int s;
  76   if (TEMP_FAILURE_RETRY (waitpid (pid, &s, 0)) != pid)
  77     {
  78       puts ("failing to wait for child process");
  79       return 1;
  80     }
  81
  82   pthread_barrier_wait (&b);
  83   pthread_join (th, NULL);
  84
  85   return !WIFEXITED (s) ? 2 : WEXITSTATUS (s);
  86 }
  87
  88
  89 #define TEST_FUNCTION do_test ()
  90 #include "../test-skeleton.c"