Do not handled volatile arguments (PR sanitizer/82484).

2017-10-11  Martin Liska  <mliska@suse.cz>

	PR sanitizer/82484
	* sanopt.c (sanitize_rewrite_addressable_params): Do not handle
	volatile arguments.
2017-10-11  Martin Liska  <mliska@suse.cz>

	PR sanitizer/82484
	* gcc.dg/asan/pr82484.c: New test.

From-SVN: r253637

gcc/ChangeLog

+2017-10-11  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/82484
+	* sanopt.c (sanitize_rewrite_addressable_params): Do not handle
+	volatile arguments.
+
 2017-10-11  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
 	* config.gcc (default_gnu_indirect_function): Default to yes for

gcc/sanopt.c

@@ -1140,7 +1140,9 @@ sanitize_rewrite_addressable_params (function *fun)
        arg; arg = DECL_CHAIN (arg))
     {
       tree type = TREE_TYPE (arg);
-      if (TREE_ADDRESSABLE (arg) && !TREE_ADDRESSABLE (type)
+      if (TREE_ADDRESSABLE (arg)
+	  && !TREE_ADDRESSABLE (type)
+	  && !TREE_THIS_VOLATILE (arg)
 	  && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
 	{
 	  TREE_ADDRESSABLE (arg) = 0;

gcc/testsuite/ChangeLog

 2017-10-11  Martin Liska  <mliska@suse.cz>
 
+	PR sanitizer/82484
+	* gcc.dg/asan/pr82484.c: New test.
+
+2017-10-11  Martin Liska  <mliska@suse.cz>
+
 	* c-c++-common/ubsan/ptr-overflow-sanitization-1.c: Scan
 	optimized dump rather than assembly.
 

gcc/testsuite/gcc.dg/asan/pr82484.c

+/* PR sanitizer/82484 */
+/* { dg-do compile } */
+
+void foo(volatile int *ptr);
+void a (volatile int b) { foo(&b); }