main/memcheck/tests/wrap1.c

#include <stdio.h>
#include "valgrind.h"

/* The simplest possible wrapping test: just call a wrapped function
   and check we run the wrapper instead. */

/* The "original" function */
__attribute__((noinline))
void actual ( void )
{
   printf("in actual\n");
}

/* The wrapper.  Since this executable won't have a soname, we have to
   use "NONE", since V treats any executable/.so which lacks a soname
   as if its soname was "NONE". */
void I_WRAP_SONAME_FNNAME_ZU(NONE,actual) ( void )
{
   OrigFn fn;
   VALGRIND_GET_ORIG_FN(fn);
   printf("wrapper-pre\n");
   CALL_FN_v_v(fn);
   printf("wrapper-post\n");
}

/* --------------- */

int main ( void )
{
   printf("starting\n");
   actual();
   return 0;
}