test.c

#include <stdlib.h>

#include "smart.h"

static void test_single () {
   char *x = (char *) free_on_exit (malloc (sizeof (char)));
}

static void test_multiple () {
   char *x[] = {0, 0, 0};
   x[0] = (char *) free_on_exit (malloc (sizeof (char)));
   x[1] = (char *) free_on_exit (malloc (sizeof (char)));
   x[2] = (char *) free_on_exit (malloc (sizeof (char)));
}

static void test_nested () {
   char *x = (char *) free_on_exit (malloc (sizeof (char)));
   test_single ();
   test_multiple ();
}

/* Run this with valgrind. You may need to install 32 bit debug
 * symbols for the C library. On Ubuntu this is libc6-dbg:i386.
 * See https://stackoverflow.com/q/10172302/774658 */
int main () {
   test_single ();
   test_multiple ();
   test_nested ();
}