memcheck/tests/wrap2.c

   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))
   9 int mul ( int x, int y ) { return x * y; }
  10
  11 int fact ( int n )
  12 {
  13    if (n == 0) return 1; else return mul(n, fact(n-1));
  14 }
  15
  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
  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 }