Make use of __builtin_dynamic_object_size

GCC and Clang provide __builtin_dynamic_object_size
(see documentation: https://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html),
so we should make use of it when its available.

1 files changed, 2 insertions, 2 deletions

diff --git a/include/stdlib.h b/include/stdlib.h
index 11155cf..8642e83 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -42,7 +42,7 @@ _FORTIFY_FN(realpath) char *realpath(const char *__p, char *__r)
 #ifndef PATH_MAX
 #error PATH_MAX unset. A fortified realpath will not work.
 #else
-        if (__r && PATH_MAX > __builtin_object_size(__r, 2)) {
+        if (__r && PATH_MAX > __bos(__r, 2)) {
                 char __buf[PATH_MAX], *__ret;
                 size_t __l;
 
@@ -50,7 +50,7 @@ _FORTIFY_FN(realpath) char *realpath(const char *__p, char *__r)
                 if (!__ret)
                         return NULL;
                 __l = __builtin_strlen(__ret) + 1;
-                if (__l > __builtin_object_size(__r, 0))
+                if (__l > __bos(__r, 0))
                         __builtin_trap();
                 __builtin_memcpy(__r, __ret, __l);
                 return __r;