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glibc  2.9
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tst-getpid1.c File Reference
#include <sched.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <stackinfo.h>
#include "../test-skeleton.c"
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Defines

#define TEST_CLONE_FLAGS   0
#define TEST_FUNCTION   do_test ()

Functions

static int f (void *a)
static int do_test (void)

Variables

static int sig

Define Documentation

#define TEST_CLONE_FLAGS   0

Definition at line 11 of file tst-getpid1.c.

#define TEST_FUNCTION   do_test ()

Definition at line 121 of file tst-getpid1.c.


Function Documentation

static int do_test ( void  ) [static]

Definition at line 30 of file tst-getpid1.c.

{
  int mypid = getpid ();

  sig = SIGRTMIN;
  sigset_t ss;
  sigemptyset (&ss);
  sigaddset (&ss, sig);
  if (sigprocmask (SIG_BLOCK, &ss, NULL) != 0)
    {
      printf ("sigprocmask failed: %m\n");
      return 1;
    }

#ifdef __ia64__
  extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base,
                     size_t __child_stack_size, int __flags,
                     void *__arg, ...);
  char st[256 * 1024] __attribute__ ((aligned));
  pid_t p = __clone2 (f, st, sizeof (st), TEST_CLONE_FLAGS, 0);
#else
  char st[128 * 1024] __attribute__ ((aligned));
# if _STACK_GROWS_DOWN
  pid_t p = clone (f, st + sizeof (st), TEST_CLONE_FLAGS, 0);
# elif _STACK_GROWS_UP
  pid_t p = clone (f, st, TEST_CLONE_FLAGS, 0);
# else
#  error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
# endif
#endif
  if (p == -1)
    {
      printf("clone failed: %m\n");
      return 1;
    }
  printf ("new thread: %d\n", (int) p);

  siginfo_t si;
  do
    if (sigwaitinfo (&ss, &si) < 0)
      {
       printf("sigwaitinfo failed: %m\n");
       kill (p, SIGKILL);
       return 1;
      }
  while  (si.si_signo != sig || si.si_code != SI_QUEUE);

  int e;
  if (waitpid (p, &e, __WCLONE) != p)
    {
      puts ("waitpid failed");
      kill (p, SIGKILL);
      return 1;
    }
  if (!WIFEXITED (e))
    {
      if (WIFSIGNALED (e))
       printf ("died from signal %s\n", strsignal (WTERMSIG (e)));
      else
       puts ("did not terminate correctly");
      return 1;
    }
  if (WEXITSTATUS (e) != 0)
    {
      printf ("exit code %d\n", WEXITSTATUS (e));
      return 1;
    }

  if (si.si_int != (int) p)
    {
      printf ("expected PID %d, got si_int %d\n", (int) p, si.si_int);
      kill (p, SIGKILL);
      return 1;
    }

  if (si.si_pid != p)
    {
      printf ("expected PID %d, got si_pid %d\n", (int) p, (int) si.si_pid);
      kill (p, SIGKILL);
      return 1;
    }

  if (getpid () != mypid)
    {
      puts ("my PID changed");
      return 1;
    }

  return 0;
}

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static int f ( void *  a) [static]

Definition at line 17 of file tst-getpid1.c.

{
  puts ("in f");
  union sigval sival;
  sival.sival_int = getpid ();
  printf ("pid = %d\n", sival.sival_int);
  if (sigqueue (getppid (), sig, sival) != 0)
    return 1;
  return 0;
}

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Variable Documentation

int sig [static]

Definition at line 14 of file tst-getpid1.c.