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