[PATCH] D50442: [MSan] add KMSAN support to Clang driver

[Alexander Potapenko via Phabricator via llvm-commits]

glider created this revision.
glider added reviewers: eugenis, kcc, dvyukov.
Herald added subscribers: llvm-commits, cryptoad.

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.

This revision depends on https://reviews.llvm.org/D34451


Repository:
  rL LLVM

https://reviews.llvm.org/D50442

Files:
  include/clang/Basic/Features.def
  include/clang/Basic/Sanitizers.def
  lib/CodeGen/BackendUtil.cpp
  lib/CodeGen/CGDeclCXX.cpp
  lib/CodeGen/CodeGenFunction.cpp
  lib/Driver/SanitizerArgs.cpp
  lib/Driver/ToolChains/Linux.cpp
  lib/Frontend/CompilerInvocation.cpp

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