Hi all!
Currently !ASAN_GLOBALS disables red-zones for global variables but
keeps their checks. This simple patch disables these checks too.
--Marat
gcc/ChangeLog:
2015-01-22 Marat Zakirov <m.zaki...@samsung.com>
* asan.c (instrument_derefs): asan-globals=0 disable instrumentation.
gcc/testsuite/ChangeLog:
2015-01-22 Marat Zakirov <m.zaki...@samsung.com>
* c-c++-common/asan/no-asan-check-glob.c: New test.
diff --git a/gcc/asan.c b/gcc/asan.c
index be28ede..c331f67 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -1809,6 +1809,8 @@ instrument_derefs (gimple_stmt_iterator *iter, tree t,
{
if (DECL_THREAD_LOCAL_P (inner))
return;
+ if (!ASAN_GLOBALS && is_global_var (inner))
+ return;
if (!TREE_STATIC (inner))
{
/* Automatic vars in the current function will be always
diff --git a/gcc/testsuite/c-c++-common/asan/no-asan-check-glob.c b/gcc/testsuite/c-c++-common/asan/no-asan-check-glob.c
new file mode 100644
index 0000000..a1b1410
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/asan/no-asan-check-glob.c
@@ -0,0 +1,13 @@
+/* { dg-options "--param asan-globals=0 -fdump-tree-asan" } */
+/* { dg-do compile } */
+/* { dg-skip-if "" { *-*-* } { "-O0" } { "*" } } */
+
+extern int a;
+
+int foo ()
+{
+ return a;
+}
+
+/* { dg-final { scan-tree-dump-times "ASAN_CHECK" 0 "asan1" } } */
+/* { dg-final { cleanup-tree-dump "asan1" } } */
