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glibc  2.9
Defines | Functions
unload2.c File Reference
#include <dlfcn.h>
#include <elf.h>
#include <errno.h>
#include <error.h>
#include <link.h>
#include <stdio.h>
#include <stdlib.h>

Go to the source code of this file.

Defines

#define MAPS   ((struct link_map *) _r_debug.r_map)
#define OUT

Functions

int main (void)

Define Documentation

#define MAPS   ((struct link_map *) _r_debug.r_map)

Definition at line 9 of file unload2.c.

#define OUT
Value:
for (map = MAPS; map != NULL; map = map->l_next)                     \
    if (map->l_type == lt_loaded)                                    \
      printf ("name = \"%s\", direct_opencount = %d\n",                     \
             map->l_name, (int) map->l_direct_opencount);                   \
  fflush (stdout)

Definition at line 11 of file unload2.c.


Function Documentation

int main ( void  )

Definition at line 19 of file unload2.c.

{
  void *h[3];
  struct link_map *map;
  void (*fp) (void);

  h[0] = dlopen ("unload2mod.so", RTLD_LAZY);
  h[1] = dlopen ("unload2mod.so", RTLD_LAZY);
  if (h[0] == NULL || h[1] == NULL)
    error (EXIT_FAILURE, errno, "cannot load \"unload2mod.so\"");
  h[2] = dlopen ("unload2dep.so", RTLD_LAZY);
  if (h[2] == NULL)
    error (EXIT_FAILURE, errno, "cannot load \"unload2dep.so\"");

  puts ("\nAfter loading everything:");
  OUT;

  dlclose (h[0]);

  puts ("\nAfter unloading \"unload2mod.so\" once:");
  OUT;

  dlclose (h[1]);

  puts ("\nAfter unloading \"unload2mod.so\" twice:");
  OUT;

  fp = dlsym (h[2], "foo");
  puts ("\nnow calling `foo'");
  fflush (stdout);
  fp ();
  puts ("managed to call `foo'");
  fflush (stdout);

  dlclose (h[2]);

  puts ("\nAfter unloading \"unload2dep.so\":");
  OUT;

  return 0;
}

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