sim/testsuite/cris/c/clone4.c

   1 /* Check that TRT happens when we reach the #threads implementation limit.
   2 #progos: linux
   3 */
   4
   5 #include <stddef.h>
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <limits.h>
   9 #include <unistd.h>
  10 #include <sched.h>
  11 #include <errno.h>
  12 #include <sys/types.h>
  13 #include <sys/wait.h>
  14
  15 int
  16 process (void *arg)
  17 {
  18   int i;
  19
  20   for (i = 0; i < 500; i++)
  21     if (sched_yield ())
  22       abort ();
  23
  24   return 0;
  25 }
  26
  27 int
  28 main (void)
  29 {
  30   int pid;
  31   int i;
  32   int stacksize = 16384;
  33
  34   for (i = 0; i < 1000; i++)
  35     {
  36       char *stack = malloc (stacksize);
  37       if (stack == NULL)
  38         abort ();
  39
  40       pid = clone (process, (char *) stack + stacksize - 64,
  41                    (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
  42                    | SIGCHLD, "ab");
  43       if (pid <= 0)
  44         {
  45           /* FIXME: Read sysconf instead of magic number.  */
  46           if (i < 60)
  47             {
  48               fprintf (stderr, "Bad clone %d\n", pid);
  49               abort ();
  50             }
  51
  52           if (errno == EAGAIN)
  53             {
  54               printf ("pass\n");
  55               exit (0);
  56             }
  57         }
  58     }
  59
  60   abort ();
  61 }