--- libelwix/example/test_mem.c	2013/01/17 10:05:35	1.1.1.1
+++ libelwix/example/test_mem.c	2015/06/24 23:35:07	1.2.34.2
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <string.h>
 #include <stdlib.h>
 #include <elwix.h>
 
@@ -23,6 +24,8 @@ main(int argc, char **argv)
 	void *addr;
 	int i;
 	u_long curr;
+
+	printf("whether default memory mapper is elwix? %d\n", elwix_mm_inuse());
 
 	for (i = 0; i < 3; i++) {
 		addr = malloc(4000);