[MSan] add KMSAN support to Clang driver
Boilerplate code for using KMSAN instrumentation in Clang.
We add a new command line flag, -fsanitize=kernel-memory, with a
corresponding SanitizerKind::KernelMemory, which, along with
SanitizerKind::Memory, maps to the memory_sanitizer feature.
KMSAN is only supported on x86_64 Linux.
It's incompatible with other sanitizers, but supports code coverage
instrumentation.
llvm-svn: 341641
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 5d3e315..c2e63de 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -34,8 +34,9 @@
RequiresPIE = DataFlow | HWAddress | Scudo,
NeedsUnwindTables = Address | HWAddress | Thread | Memory | DataFlow,
SupportsCoverage = Address | HWAddress | KernelAddress | KernelHWAddress |
- Memory | Leak | Undefined | Integer | ImplicitConversion |
- Nullability | DataFlow | Fuzzer | FuzzerNoLink,
+ Memory | KernelMemory | Leak | Undefined | Integer |
+ ImplicitConversion | Nullability | DataFlow | Fuzzer |
+ FuzzerNoLink,
RecoverableByDefault = Undefined | Integer | ImplicitConversion | Nullability,
Unrecoverable = Unreachable | Return,
AlwaysRecoverable = KernelAddress | KernelHWAddress,
@@ -380,8 +381,10 @@
SafeStack),
std::make_pair(KernelHWAddress, Address | HWAddress | Leak | Thread |
Memory | KernelAddress | Efficiency |
- SafeStack | ShadowCallStack)};
-
+ SafeStack | ShadowCallStack),
+ std::make_pair(KernelMemory, Address | HWAddress | Leak | Thread |
+ Memory | KernelAddress | Efficiency |
+ Scudo | SafeStack)};
// Enable toolchain specific default sanitizers if not explicitly disabled.
SanitizerMask Default = TC.getDefaultSanitizers() & ~AllRemove;
diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index d878681..2a87cb0 100644
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -939,6 +939,8 @@
Res |= SanitizerKind::Leak;
if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64)
Res |= SanitizerKind::Thread;
+ if (IsX86_64)
+ Res |= SanitizerKind::KernelMemory;
if (IsX86_64 || IsMIPS64)
Res |= SanitizerKind::Efficiency;
if (IsX86 || IsX86_64)