include/llvm/Transforms/Utils/SanitizerStats.h

   1 //===- SanitizerStats.h - Sanitizer statistics gathering  -------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Declares functions and data structures for sanitizer statistics gathering.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_TRANSFORMS_UTILS_SANITIZERSTATS_H
  14 #define LLVM_TRANSFORMS_UTILS_SANITIZERSTATS_H
  15
  16 #include "llvm/IR/IRBuilder.h"
  17
  18 namespace llvm {
  19
  20 // Number of bits in data that are used for the sanitizer kind. Needs to match
  21 // __sanitizer::kKindBits in compiler-rt/lib/stats/stats.h
  22 enum { kSanitizerStatKindBits = 3 };
  23
  24 enum SanitizerStatKind {
  25   SanStat_CFI_VCall,
  26   SanStat_CFI_NVCall,
  27   SanStat_CFI_DerivedCast,
  28   SanStat_CFI_UnrelatedCast,
  29   SanStat_CFI_ICall,
  30 };
  31
  32 struct SanitizerStatReport {
  33   SanitizerStatReport(Module *M);
  34
  35   /// Generates code into B that increments a location-specific counter tagged
  36   /// with the given sanitizer kind SK.
  37   void create(IRBuilder<> &B, SanitizerStatKind SK);
  38
  39   /// Finalize module stats array and add global constructor to register it.
  40   void finish();
  41
  42 private:
  43   Module *M;
  44   GlobalVariable *ModuleStatsGV;
  45   ArrayType *StatTy;
  46   StructType *EmptyModuleStatsTy;
  47
  48   std::vector<Constant *> Inits;
  49   ArrayType *makeModuleStatsArrayTy();
  50   StructType *makeModuleStatsTy();
  51 };
  52
  53 }
  54
  55 #endif