1
2 #include <stdio.h>
3 #include "valgrind.h"
4
5 /* Check that function wrapping works for a recursive function. */
6
7 /* This is needed to stop gcc4 turning 'fact' into a loop */
8 __attribute__((noinline))
mul(int x,int y)9 int mul ( int x, int y ) { return x * y; }
10
fact(int n)11 int fact ( int n )
12 {
13 if (n == 0) return 1; else return mul(n, fact(n-1));
14 }
15
I_WRAP_SONAME_FNNAME_ZU(NONE,fact)16 int I_WRAP_SONAME_FNNAME_ZU(NONE,fact) ( int n )
17 {
18 int r;
19 OrigFn fn;
20 VALGRIND_GET_ORIG_FN(fn);
21 printf("in wrapper1-pre: fact(%d)\n", n);
22 CALL_FN_W_W(r, fn, n);
23 printf("in wrapper1-post: fact(%d) = %d\n", n, r);
24 return r;
25 }
26
27 /* --------------- */
28
main(void)29 int main ( void )
30 {
31 int r;
32 printf("computing fact(5)\n");
33 r = fact(5);
34 printf("fact(5) = %d\n", r);
35 return 0;
36 }
37