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    SubjectRe: [PATCH v2 5/5] kasan: add compiler support for clang
    On Wed, Nov 29, 2017 at 10:50 PM, 'Paul Lawrence' via kasan-dev
    <kasan-dev@googlegroups.com> wrote:
    > For now we can hard-code ASAN ABI level 5, since historical clang builds
    > can't build the kernel anyway. We also need to emulate gcc's
    > __SANITIZE_ADDRESS__ flag, or memset() calls won't be instrumented.
    >
    > Signed-off-by: Greg Hackmann <ghackmann@google.com>
    > Signed-off-by: Paul Lawrence <paullawrence@google.com>
    >
    > ---
    > include/linux/compiler-clang.h | 8 ++++++++
    > 1 file changed, 8 insertions(+)
    >
    > diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
    > index 3b609edffa8f..d02a4df3f473 100644
    > --- a/include/linux/compiler-clang.h
    > +++ b/include/linux/compiler-clang.h
    > @@ -19,3 +19,11 @@
    >
    > #define randomized_struct_fields_start struct {
    > #define randomized_struct_fields_end };
    > +
    > +/* all clang versions usable with the kernel support KASAN ABI version 5 */
    > +#define KASAN_ABI_VERSION 5
    > +
    > +/* emulate gcc's __SANITIZE_ADDRESS__ flag */
    > +#if __has_feature(address_sanitizer)
    > +#define __SANITIZE_ADDRESS__
    > +#endif

    Reviewed-by: Dmitry Vyukov <dvyukov@google.com>

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