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glibc  2.9
Defines | Functions | Variables
tst-atfork2.c File Reference
#include <dlfcn.h>
#include <errno.h>
#include <mcheck.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()

Functions

static void prepare (void)
static void parent (void)
static void child (void)
static int do_test (void)

Variables

int val

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 158 of file tst-atfork2.c.


Function Documentation

static void child ( void  ) [static]

Definition at line 46 of file tst-atfork2.c.

{
  val += 8;
}

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static int do_test ( void  ) [static]

Definition at line 53 of file tst-atfork2.c.

{
  mtrace ();

  if (pthread_atfork (prepare, parent, child) != 0)
    {
      puts ("do_test: atfork failed");
      exit (1);
    }

  void *h = dlopen ("tst-atfork2mod.so", RTLD_LAZY);
  if (h == NULL)
    {
      printf ("dlopen failed: %s\n", dlerror ());
      exit (1);
    }

  /* First trial of fork.  */
  pid_t pid = fork ();
  if (pid == -1)
    {
      puts ("1st fork failed");
      exit (1);
    }

  if (pid == 0)
    {
      /* Child.  */
      if (val != 80)
       {
         printf ("1st: expected val=%d, got %d\n", 80, val);
         exit (2);
       }

      exit (0);
    }

  /* Parent.  */
  if (val != 24)
    {
      printf ("1st: expected val=%d, got %d\n", 24, val);
      exit (1);
    }

  int status;
  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
    {
      puts ("1st waitpid failed");
      exit (1);
    }

  if (status != 0)
    exit (status);

  puts ("unloading now");

  /* Unload the module.  */
  if (dlclose (h) != 0)
    {
      puts ("dlclose failed");
      exit (1);
    }

  puts ("2nd fork");

  /* Second fork trial.   */
  val = 1;
  pid = fork ();
  if (pid == -1)
    {
      puts ("2nd fork failed");
      exit (1);
    }

  if (pid == 0)
    {
      /* Child.  */
      if (val != 10)
       {
         printf ("2nd: expected val=%d, got %d\n", 10, val);
         exit (3);
       }

      exit (0);
    }

  /* Parent.  */
  if (val != 6)
    {
      printf ("2nd: expected val=%d, got %d\n", 6, val);
      exit (1);
    }

  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
    {
      puts ("2nd waitpid failed");
      exit (1);
    }

  if (status != 0)
    exit (status);

  return 0;
}

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static void parent ( void  ) [static]

Definition at line 40 of file tst-atfork2.c.

{
  val += 4;
}

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static void prepare ( void  ) [static]

Definition at line 34 of file tst-atfork2.c.

{
  val *= 2;
}

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Variable Documentation

Definition at line 31 of file tst-atfork2.c.