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      1 /* Test STT_GNU_IFUNC symbols:
      2 
      3    1. Direct function call.
      4    2. Function pointer.
      5    3. Visibility with override.
      6  */
      7 
      8 #include <stdlib.h>
      9 
     10 int __attribute__ ((noinline)) foo_hidden (void);
     11 
     12 int ret_foo;
     13 int ret_foo_hidden;
     14 int ret_foo_protected;
     15 
     16 extern int foo (void);
     17 extern int foo_protected (void);
     18 
     19 #ifndef FOO_P
     20 typedef int (*foo_p) (void);
     21 #endif
     22 
     23 foo_p foo_ptr = foo;
     24 foo_p foo_procted_ptr = foo_protected;
     25 
     26 extern foo_p get_foo_p (void);
     27 extern foo_p get_foo_hidden_p (void);
     28 extern foo_p get_foo_protected_p (void);
     29 
     30 int
     31 __attribute__ ((noinline))
     32 foo (void)
     33 {
     34   return -30;
     35 }
     36 
     37 int
     38 __attribute__ ((noinline))
     39 foo_hidden (void)
     40 {
     41   return -20;
     42 }
     43 
     44 int
     45 __attribute__ ((noinline))
     46 foo_protected (void)
     47 {
     48   return -40;
     49 }
     50 
     51 int
     52 main (void)
     53 {
     54   foo_p p;
     55 
     56   if (foo_ptr != foo)
     57     abort ();
     58   if ((*foo_ptr) () != -30)
     59     abort ();
     60 
     61   if (foo_procted_ptr != foo_protected)
     62     abort ();
     63   if ((*foo_procted_ptr) () != -40)
     64     abort ();
     65 
     66   p = get_foo_p ();
     67   if (p != foo)
     68     abort ();
     69   if (foo () != -30)
     70     abort ();
     71   if (ret_foo != -30 || (*p) () != ret_foo)
     72     abort ();
     73 
     74   p = get_foo_hidden_p ();
     75   if (foo_hidden () != -20)
     76     abort ();
     77   if (ret_foo_hidden != 1 || (*p) () != ret_foo_hidden)
     78     abort ();
     79 
     80   p = get_foo_protected_p ();
     81   if (p == foo_protected)
     82     abort ();
     83   if (foo_protected () != -40)
     84     abort ();
     85   if (ret_foo_protected != 0 || (*p) () != ret_foo_protected)
     86     abort ();
     87 
     88   return 0;
     89 }
     90