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//===--------- Definition of the HWAddressSanitizer class -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares the Hardware AddressSanitizer class which is a port of the
// legacy HWAddressSanitizer pass to use the new PassManager infrastructure.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_INSTRUMENTATION_HWADDRESSSANITIZER_H
#define LLVM_TRANSFORMS_INSTRUMENTATION_HWADDRESSSANITIZER_H
#include "llvm/ADT/STLFunctionalExtras.h"
#include "llvm/IR/PassManager.h"
namespace llvm {
class Module;
class StringRef;
class raw_ostream;
struct HWAddressSanitizerOptions {
HWAddressSanitizerOptions()
: HWAddressSanitizerOptions(false, false, false){};
HWAddressSanitizerOptions(bool CompileKernel, bool Recover,
bool DisableOptimization)
: CompileKernel(CompileKernel), Recover(Recover),
DisableOptimization(DisableOptimization){};
bool CompileKernel;
bool Recover;
bool DisableOptimization;
};
/// This is a public interface to the hardware address sanitizer pass for
/// instrumenting code to check for various memory errors at runtime, similar to
/// AddressSanitizer but based on partial hardware assistance.
class HWAddressSanitizerPass : public PassInfoMixin<HWAddressSanitizerPass> {
public:
explicit HWAddressSanitizerPass(HWAddressSanitizerOptions Options)
: Options(Options){};
PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
static bool isRequired() { return true; }
void printPipeline(raw_ostream &OS,
function_ref<StringRef(StringRef)> MapClassName2PassName);
private:
HWAddressSanitizerOptions Options;
};
namespace HWASanAccessInfo {
// Bit field positions for the accessinfo parameter to
// llvm.hwasan.check.memaccess. Shared between the pass and the backend. Bits
// 0-15 are also used by the runtime.
enum {
AccessSizeShift = 0, // 4 bits
IsWriteShift = 4,
RecoverShift = 5,
MatchAllShift = 16, // 8 bits
HasMatchAllShift = 24,
CompileKernelShift = 25,
};
enum { RuntimeMask = 0xffff };
} // namespace HWASanAccessInfo
} // namespace llvm
#endif
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