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#include <dlfcn.h>
#include <libintl.h>
#include <link.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAPS ((struct link_map *) _r_debug.r_map)
static int
check_loaded_objects (const char **loaded)
{
struct link_map *lm;
int n;
int *found = NULL;
int errors = 0;
for (n = 0; loaded[n]; n++)
/* NOTHING */;
if (n)
{
found = (int *) alloca (sizeof (int) * n);
memset (found, 0, sizeof (int) * n);
}
printf(" Name\n");
printf(" --------------------------------------------------------\n");
for (lm = MAPS; lm; lm = lm->l_next)
{
if (lm->l_name && lm->l_name[0])
printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);
if (lm->l_type == lt_loaded && lm->l_name)
{
int match = 0;
for (n = 0; loaded[n] != NULL; n++)
{
if (strcmp (basename (loaded[n]), basename (lm->l_name)) == 0)
{
found[n] = 1;
match = 1;
break;
}
}
if (match == 0)
{
++errors;
printf ("ERRORS: %s is not unloaded\n", lm->l_name);
}
}
}
for (n = 0; loaded[n] != NULL; n++)
{
if (found[n] == 0)
{
++errors;
printf ("ERRORS: %s is not loaded\n", loaded[n]);
}
}
return errors;
}
int
main (void)
{
void *obj2;
void *obj3[2];
const char *loaded[] = { NULL, NULL, NULL, NULL };
int errors = 0;
printf ("\nThis is what is in memory now:\n");
errors += check_loaded_objects (loaded);
printf ("\nLoading shared object neededobj2.so\n");
obj2 = dlopen ("neededobj2.so", RTLD_LAZY);
if (obj2 == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
loaded[0] = "neededobj1.so";
loaded[1] = "neededobj2.so";
errors += check_loaded_objects (loaded);
printf ("\nLoading shared object neededobj3.so\n");
obj3[0] = dlopen( "neededobj3.so", RTLD_LAZY);
if (obj3[0] == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
loaded[2] = "neededobj3.so";
errors += check_loaded_objects (loaded);
printf ("\nNow loading shared object neededobj3.so again\n");
obj3[1] = dlopen ("neededobj3.so", RTLD_LAZY);
if (obj3[1] == NULL)
{
printf ("%s\n", dlerror ());
exit (1);
}
errors += check_loaded_objects (loaded);
printf ("\nClosing neededobj3.so once\n");
dlclose (obj3[0]);
errors += check_loaded_objects (loaded);
printf ("\nClosing neededobj2.so\n");
dlclose (obj2);
errors += check_loaded_objects (loaded);
printf ("\nClosing neededobj3.so for the second time\n");
dlclose (obj3[1]);
loaded[0] = NULL;
loaded[1] = NULL;
loaded[2] = NULL;
errors += check_loaded_objects (loaded);
if (errors != 0)
printf ("%d errors found\n", errors);
return errors;
}
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