From fe5d815487de3bcb4aef0b0d6329e563638f3f49 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20R=C3=BChsen?= <address@hidden>
Date: Fri, 21 Jul 2017 23:18:21 +0200
Subject: [PATCH] malloca: Silence a warning from clang's memory sanitizer.

* lib/malloca.c (NO_SANITIZE_MEMORY): New macro.
(freea): Use it.
---
 ChangeLog     |  6 ++++++
 lib/malloca.c | 12 +++++++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 2a59e49..0f0acdc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-07-21  Tim Rühsen  <address@hidden>
+
+	malloca: Silence a warning from clang's memory sanitizer.
+	* lib/malloca.c (NO_SANITIZE_MEMORY): New macro.
+	(freea): Use it.
+
 2017-07-18  Bruno Haible  <address@hidden>
 
 	host-cpu-c-abi: Fix detection of MIPS ABI.
diff --git a/lib/malloca.c b/lib/malloca.c
index 969127a..1a7ac8d 100644
--- a/lib/malloca.c
+++ b/lib/malloca.c
@@ -25,6 +25,16 @@
 
 #include "verify.h"
 
+/* Silence a warning from clang's MemorySanitizer.  */
+#if defined __has_feature
+# if __has_feature(memory_sanitizer)
+#  define NO_SANITIZE_MEMORY __attribute__((no_sanitize("memory")))
+# endif
+#endif
+#ifndef NO_SANITIZE_MEMORY
+# define NO_SANITIZE_MEMORY
+#endif
+
 /* The speed critical point in this file is freea() applied to an alloca()
    result: it must be fast, to match the speed of alloca().  The speed of
    mmalloca() and freea() in the other case are not critical, because they
@@ -112,7 +122,7 @@ mmalloca (size_t n)
 }
 
 #if HAVE_ALLOCA
-void
+void NO_SANITIZE_MEMORY
 freea (void *p)
 {
   /* mmalloca() may have returned NULL.  */
-- 
2.7.4