1 //===--------- Definition of the HWAddressSanitizer class -------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the Hardware AddressSanitizer class which is a port of the 11 // legacy HWAddressSanitizer pass to use the new PassManager infrastructure. 12 // 13 //===----------------------------------------------------------------------===// 14 #ifndef LLVM_TRANSFORMS_INSTRUMENTATION_HWADDRESSSANITIZERPASS_H 15 #define LLVM_TRANSFORMS_INSTRUMENTATION_HWADDRESSSANITIZERPASS_H 16 17 #include "llvm/IR/Function.h" 18 #include "llvm/IR/PassManager.h" 19 20 namespace llvm { 21 22 /// This is a public interface to the hardware address sanitizer pass for 23 /// instrumenting code to check for various memory errors at runtime, similar to 24 /// AddressSanitizer but based on partial hardware assistance. 25 class HWAddressSanitizerPass : public PassInfoMixin<HWAddressSanitizerPass> { 26 public: 27 explicit HWAddressSanitizerPass(bool CompileKernel = false, 28 bool Recover = false); 29 PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM); 30 static bool isRequired() { return true; } 31 32 private: 33 bool CompileKernel; 34 bool Recover; 35 }; 36 37 FunctionPass *createHWAddressSanitizerLegacyPassPass(bool CompileKernel = false, 38 bool Recover = false); 39 40 namespace HWASanAccessInfo { 41 42 // Bit field positions for the accessinfo parameter to 43 // llvm.hwasan.check.memaccess. Shared between the pass and the backend. Bits 44 // 0-15 are also used by the runtime. 45 enum { 46 AccessSizeShift = 0, // 4 bits 47 IsWriteShift = 4, 48 RecoverShift = 5, 49 MatchAllShift = 16, // 8 bits 50 HasMatchAllShift = 24, 51 CompileKernelShift = 25, 52 }; 53 54 enum { RuntimeMask = 0xffff }; 55 56 } // namespace HWASanAccessInfo 57 58 } // namespace llvm 59 60 #endif 61