asan.c (asan_finish_file): Disable __asan_init calls for KASan; don't emit empty ctors.

2014-10-03  Yury Gribov  <y.gribov@samsung.com>

	* asan.c (asan_finish_file): Disable __asan_init calls for KASan;
	don't emit empty ctors.

From-SVN: r215851

gcc/ChangeLog

+2014-10-03  Yury Gribov  <y.gribov@samsung.com>
+
+	* asan.c (asan_finish_file): Disable __asan_init calls for KASan;
+	don't emit empty ctors.
+
 2014-10-03  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* convert.c (convert_to_integer): Do not introduce useless conversions

gcc/asan.c

@@ -2400,8 +2400,11 @@ asan_finish_file (void)
      nor after .LASAN* array.  */
   flag_sanitize &= ~SANITIZE_ADDRESS;
 
+  if (flag_sanitize & SANITIZE_USER_ADDRESS)
+    {
       tree fn = builtin_decl_implicit (BUILT_IN_ASAN_INIT);
       append_to_statement_list (build_call_expr (fn, 0), &asan_ctor_statements);
+    }
   FOR_EACH_DEFINED_VARIABLE (vnode)
     if (TREE_ASM_WRITTEN (vnode->decl)
 	&& asan_protect_global (vnode->decl))
@@ -2438,7 +2441,7 @@ asan_finish_file (void)
       DECL_INITIAL (var) = ctor;
       varpool_node::finalize_decl (var);
 
-      fn = builtin_decl_implicit (BUILT_IN_ASAN_REGISTER_GLOBALS);
+      tree fn = builtin_decl_implicit (BUILT_IN_ASAN_REGISTER_GLOBALS);
       tree gcount_tree = build_int_cst (pointer_sized_int_node, gcount);
       append_to_statement_list (build_call_expr (fn, 2,
 						 build_fold_addr_expr (var),
@@ -2453,6 +2456,7 @@ asan_finish_file (void)
       cgraph_build_static_cdtor ('D', dtor_statements,
 				 MAX_RESERVED_INIT_PRIORITY - 1);
     }
+  if (asan_ctor_statements)
     cgraph_build_static_cdtor ('I', asan_ctor_statements,
 			       MAX_RESERVED_INIT_PRIORITY - 1);
   flag_sanitize |= SANITIZE_ADDRESS;