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/* Test STT_GNU_IFUNC symbols with dlopen:
1. Direct function call.
2. Function pointer.
3. Visibility with override.
*/
#include <dlfcn.h>
#include <stdlib.h>
#include <stdio.h>
extern int __attribute__ ((noinline)) foo (void);
extern int __attribute__ ((noinline)) foo_hidden (void);
extern int __attribute__ ((noinline)) foo_protected (void);
typedef int (*foo_p) (void);
int
__attribute__ ((noinline))
foo (void)
{
return -30;
}
int
__attribute__ ((noinline))
foo_hidden (void)
{
return -20;
}
int
__attribute__ ((noinline))
foo_protected (void)
{
return -40;
}
int
main (void)
{
foo_p p;
foo_p (*f) (void);
int *ret;
void *h = dlopen ("ifuncmod3.so", RTLD_LAZY);
if (h == NULL)
{
printf ("cannot load: %s\n", dlerror ());
return 1;
}
p = dlsym (h, "foo");
if (p == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
if ((*p) () != -1)
abort ();
f = dlsym (h, "get_foo_p");
if (f == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
ret = dlsym (h, "ret_foo");
if (ret == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
p = (*f) ();
if (p != foo)
abort ();
if (foo () != -30)
abort ();
if (*ret != -30 || (*p) () != *ret)
abort ();
f = dlsym (h, "get_foo_hidden_p");
if (f == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
ret = dlsym (h, "ret_foo_hidden");
if (ret == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
p = (*f) ();
if (foo_hidden () != -20)
abort ();
if (*ret != 1 || (*p) () != *ret)
abort ();
f = dlsym (h, "get_foo_protected_p");
if (f == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
ret = dlsym (h, "ret_foo_protected");
if (ret == NULL)
{
printf ("symbol not found: %s\n", dlerror ());
return 1;
}
p = (*f) ();
if (p == foo_protected)
abort ();
if (foo_protected () != -40)
abort ();
if (*ret != 0 || (*p) () != *ret)
abort ();
if (dlclose (h) != 0)
{
printf ("cannot close: %s\n", dlerror ());
return 1;
}
return 0;
}
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