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[ASan] Initial support for Kernel AddressSanitizer

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This patch adds initial support for the -fsanitize=kernel-address flag to Clang.
Right now it's quite restricted: only out-of-line instrumentation is supported, globals are not instrumented, some GCC kasan flags are not supported.
Using this patch I am able to build and boot the KASan tree with LLVMLinux patches from github.com/ramosian-glider/kasan/tree/kasan_llvmlinux.
To disable KASan instrumentation for a certain function attribute((no_sanitize("kernel-address"))) can be used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240131 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexander Potapenko
2015-06-19 12:19:07 +00:00
parent ec77d9ad83
commit e9149f4f8c
2 changed files with 63 additions and 44 deletions
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4
include/llvm/Transforms/Instrumentation.h
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@@ -84,8 +84,8 @@ ModulePass *createInstrProfilingPass(
const InstrProfOptions &Options = InstrProfOptions());
// Insert AddressSanitizer (address sanity checking) instrumentation
FunctionPass *createAddressSanitizerFunctionPass();
ModulePass *createAddressSanitizerModulePass();
FunctionPass *createAddressSanitizerFunctionPass(bool CompileKernel = false);
ModulePass *createAddressSanitizerModulePass(bool CompileKernel = false);
// Insert MemorySanitizer instrumentation (detection of uninitialized reads)
FunctionPass *createMemorySanitizerPass(int TrackOrigins = 0);