glibc/elf/unload3.c

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#include <dlfcn.h>
#include <stdio.h>
int
main (void)
{
void *g = dlopen ("unload3mod1.so", RTLD_GLOBAL | RTLD_NOW);
void *h = dlopen ("unload3mod2.so", RTLD_GLOBAL | RTLD_NOW);
if (g == NULL || h == NULL)
{
printf ("dlopen unload3mod{1,2}.so failed: %p %p\n", g, h);
return 1;
}
dlclose (h);
dlclose (g);
g = dlopen ("unload3mod3.so", RTLD_GLOBAL | RTLD_NOW);
h = dlopen ("unload3mod4.so", RTLD_GLOBAL | RTLD_NOW);
if (g == NULL || h == NULL)
{
printf ("dlopen unload3mod{3,4}.so failed: %p %p\n", g, h);
return 1;
}
int (*fn) (int);
fn = dlsym (h, "bar");
if (fn == NULL)
{
puts ("dlsym failed");
return 1;
}
int val = fn (16);
if (val != 24)
{
printf ("bar returned %d != 24\n", val);
return 1;
}
return 0;
}