hwasan: add -fsanitize=kernel-hwaddress flag

This patch adds -fsanitize=kernel-hwaddress flag, that essentially enables
-hwasan-kernel=1 -hwasan-recover=1 -hwasan-match-all-tag=0xff.

Differential Revision: https://reviews.llvm.org/D45046

llvm-svn: 330044

1 files changed, 3 insertions, 1 deletions

diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index c9544a39c20..5473be2c1e7 100644
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -900,8 +900,10 @@ SanitizerMask Linux::getSupportedSanitizers() const {
     Res |= SanitizerKind::Function;
   if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch)
     Res |= SanitizerKind::Scudo;
-  if (IsX86_64 || IsAArch64)
+  if (IsX86_64 || IsAArch64) {
     Res |= SanitizerKind::HWAddress;
+    Res |= SanitizerKind::KernelHWAddress;
+  }
   return Res;
 }