File glibc-2.16-mcheck.patch of Package glibc

Index: glibc-2.15/malloc/mcheck.c
===================================================================
--- glibc-2.15.orig/malloc/mcheck.c
+++ glibc-2.15/malloc/mcheck.c
@@ -371,6 +371,12 @@ mabort (enum mcheck_status status)
 #endif
 }
 
+#ifndef malloc_opt_barrier
+#define malloc_opt_barrier(x) \
+({ __typeof (x) __x = x; __asm ("" : "+m" (__x)); __x; })
+#define malloc_force_eval(x) __asm __volatile ("" : : "m" (x))
+#endif
+
 int
 mcheck (func)
      void (*func) (enum mcheck_status);
@@ -382,6 +388,7 @@ mcheck (func)
     {
       /* We call malloc() once here to ensure it is initialized.  */
       void *p = malloc (0);
+      p = malloc_opt_barrier (p);
       free (p);
 
       old_free_hook = __free_hook;