diff --git a/bash/functions/functions.sh b/bash/functions/functions.sh
new file mode 100755
index 0000000..a3b88be
--- /dev/null
+++ b/bash/functions/functions.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+function run_cmd()
+{
+  err_code=$(($err_code+1))
+  if [[ "$1" == "" ]]; then
+	echo "Error:Need command to run_cmd() function!"
+	exit -1
+  fi
+  $1
+  if [[ "$?" != "0" ]]; then
+	echo \"$1\" error >&2
+	exit $err_code
+  fi
+}
diff --git a/c/malloc_speed_test/pool_list.c b/c/malloc_speed_test/pool_list.c
index c02f9e7..bf41fc4 100644
--- a/c/malloc_speed_test/pool_list.c
+++ b/c/malloc_speed_test/pool_list.c
@@ -5,14 +5,10 @@
 #define TRUE 1
 #define FALSE 0
 
-struct object_s {
-    char val;
-};
-
 struct block_s {
     struct block_s *next;
     struct block_s *prev;
-    struct object_s obj;
+    char obj[1];
 };
 
 struct block_pool {
@@ -112,6 +108,11 @@ void pool_free(struct block_pool *bp, void *p)
 		bp->busy_pool = b2;
 }
 
+
+struct object_s {
+    char val;
+};
+
 int main()
 {
 	unsigned long long i;