glibc/dlfcn/default.c

#include <dlfcn.h>
#include <stdio.h>
#include <string.h>


extern int test_in_mod1 (void *);
extern int test_in_mod2 (void *);


int
main (int argc, char *argv[])
{
  int (*ifp) (void);
  void *p;
  int result = 0;
  Dl_info info;

  dladdr(main, &info);
  if (info.dli_fname == NULL)
    {
      printf ("%s: dladdr returns NULL dli_fname\n", __FILE__);
      result = 1;
    }
  else if (strcmp (info.dli_fname, argv[0]))
    {
      printf ("%s: dladdr returned '%s' as dli_fname\n", __FILE__, info.dli_fname);
      result = 1;
    }
  else
    printf ("%s: dladdr returned correct dli_fname\n", __FILE__);

  /* Find function `main'.  */
  p = dlsym (RTLD_DEFAULT, "main");
  if (p == NULL)
    {
      printf ("%s: main not found\n", __FILE__);
      result = 1;
    }
  else if ((int (*)(int, char **))p != main)
    {
      printf ("%s: wrong address returned for main\n", __FILE__);
      result = 1;
    }
  else
    printf ("%s: main correctly found\n", __FILE__);

  ifp = dlsym (RTLD_DEFAULT, "found_in_mod1");
  if ((void *) ifp == NULL)
    {
      printf ("%s: found_in_mod1 not found\n", __FILE__);
      result = 1;
    }
  else if (ifp () != 1)
    {
      printf ("%s: wrong address returned for found_in_mod1\n", __FILE__);
      result = 1;
    }
  else
    printf ("%s: found_in_mod1 correctly found\n", __FILE__);

  ifp = dlsym (RTLD_DEFAULT, "found_in_mod2");
  if ((void *) ifp == NULL)
    {
      printf ("%s: found_in_mod2 not found\n", __FILE__);
      result = 1;
    }
  else if (ifp () != 2)
    {
      printf ("%s: wrong address returned for found_in_mod2\n", __FILE__);
      result = 1;
    }
  else
    printf ("%s: found_in_mod2 correctly found\n", __FILE__);

  result |= test_in_mod1 (main);

  result |= test_in_mod2 (main);

  return result;
}