From: Martin Liska <mliska@suse.cz>
Date: Fri, 30 Sep 2016 08:24:47 +0000 (+0200)
Subject: Enhance documentation of asan-use-after-return param.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c9ff08a76360616f61398b991315a8f5c23958ce;p=gcc.git

Enhance documentation of asan-use-after-return param.

	* doc/invoke.texi: Document asan-use-after-return that
	it's disabled by default in runtime.

From-SVN: r240648
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 25129cb5d96..9be02e1d322 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-09-30  Martin Liska  <mliska@suse.cz>
+
+	* doc/invoke.texi: Document asan-use-after-return that
+	it's disabled by default in runtime.
+
 2016-09-30  Richard Biener  <rguenther@suse.de>
 
 	* tree-vrp.c (intersect_ranges): If we failed to handle
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 8a84e4f4823..01215601989 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -10034,6 +10034,10 @@ is enabled by default when using @option{-fsanitize=address} option.
 To disable use-after-return detection use 
 @option{--param asan-use-after-return=0}.
 
+Note: The check is disabled by default at runtime.  To enable the check,
+you should set environment variable @env{ASAN_OPTIONS} to
+@code{detect_stack_use_after_return=1}.
+
 @item asan-instrumentation-with-call-threshold
 If number of memory accesses in function being instrumented
 is greater or equal to this number, use callbacks instead of inline checks.