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      1 
      2 #include <stdio.h>
      3 #include "valgrind.h"
      4 
      5 /* Check that function wrapping works for a mutually recursive
      6    pair. */
      7 
      8 static int fact1 ( int n );
      9 static int fact2 ( int n );
     10 
     11 /* This is needed to stop gcc4 turning 'fact' into a loop */
     12 __attribute__((noinline))
     13 int mul ( int x, int y ) { return x * y; }
     14 
     15 int fact1 ( int n )
     16 {
     17    if (n == 0) return 1; else return mul(n, fact2(n-1));
     18 }
     19 int fact2 ( int n )
     20 {
     21    if (n == 0) return 1; else return mul(n, fact1(n-1));
     22 }
     23 
     24 
     25 int I_WRAP_SONAME_FNNAME_ZU(NONE,fact1) ( int n )
     26 {
     27    int    r;
     28    OrigFn fn;
     29    VALGRIND_GET_ORIG_FN(fn);
     30    printf("in wrapper1-pre:  fact(%d)\n", n);
     31    CALL_FN_W_W(r,fn,n);
     32    printf("in wrapper1-post: fact(%d) = %d\n", n, r);
     33    return r;
     34 }
     35 
     36 int I_WRAP_SONAME_FNNAME_ZU(NONE,fact2) ( int n )
     37 {
     38    int    r;
     39    OrigFn fn;
     40    VALGRIND_GET_ORIG_FN(fn);
     41    printf("in wrapper2-pre:  fact(%d)\n", n);
     42    CALL_FN_W_W(r,fn,n);
     43    printf("in wrapper2-post: fact(%d) = %d\n", n, r);
     44    return r;
     45 }
     46 
     47 /* --------------- */
     48 
     49 int main ( void )
     50 {
     51    int r;
     52    printf("computing fact1(5)\n");
     53    r = fact1(5);
     54    printf("fact1(5) = %d\n", r);
     55    return 0;
     56 }
     57