inet: fix: possible unaligned access in packed structure (inet/inet6)

[lttng-tools.git] / src / common / macros.h

diff --git a/src/common/macros.h b/src/common/macros.h
index 7eaf27cdf3787cbf02d5c4fc2bc48eb43632b734..36ec04b745738d59090f2de5825ba230060b9fa4 100644 (file)
--- a/src/common/macros.h
+++ b/src/common/macros.h
@@ -72,7 +72,7 @@ void *zmalloc(size_t len)
 #endif
 
 #ifndef max_t
-#define max_t(type, a, b)      ((type) max(a, b))
+#define max_t(type, a, b)      max((type) a, (type) b)
 #endif
 
 #ifndef min
@@ -96,6 +96,13 @@ void *zmalloc(size_t len)
 
 #define member_sizeof(type, field)     sizeof(((type *) 0)->field)
 
+/*
+ * Get an aligned pointer to a value. This is meant
+ * as a helper to pass an aligned pointer to a member in a packed structure
+ * to a function.
+ */
+#define ALIGNED_CONST_PTR(value) (((const typeof(value) []) { value }))
+
 /*
  * lttng_strncpy returns 0 on success, or nonzero on failure.
  * It checks that the @src string fits into @dst_len before performing