Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- FaultMaps.h - The "FaultMaps" section --------------------*- 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

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_FAULTMAPS_H

#define LLVM_CODEGEN_FAULTMAPS_H

#include "llvm/MC/MCSymbol.h"

#include <map>

#include <vector>

namespace llvm {

class AsmPrinter;

class MCExpr;

class FaultMaps {

public:

  enum FaultKind {

    FaultingLoad = 1,

    FaultingLoadStore,

    FaultingStore,

    FaultKindMax

  };

  explicit FaultMaps(AsmPrinter &AP);

  static const char *faultTypeToString(FaultKind);

  void recordFaultingOp(FaultKind FaultTy, const MCSymbol *FaultingLabel,

                        const MCSymbol *HandlerLabel);

  void serializeToFaultMapSection();

  void reset() {

    FunctionInfos.clear();

  }

private:

  static const char *WFMP;

  struct FaultInfo {

    FaultKind Kind = FaultKindMax;

    const MCExpr *FaultingOffsetExpr = nullptr;

    const MCExpr *HandlerOffsetExpr = nullptr;

    FaultInfo() = default;

    explicit FaultInfo(FaultMaps::FaultKind Kind, const MCExpr *FaultingOffset,

                       const MCExpr *HandlerOffset)

        : Kind(Kind), FaultingOffsetExpr(FaultingOffset),

          HandlerOffsetExpr(HandlerOffset) {}

  };

  using FunctionFaultInfos = std::vector<FaultInfo>;

  // We'd like to keep a stable iteration order for FunctionInfos to help

  // FileCheck based testing.

  struct MCSymbolComparator {

    bool operator()(const MCSymbol *LHS, const MCSymbol *RHS) const {

      return LHS->getName() < RHS->getName();

    }

  };

  std::map<const MCSymbol *, FunctionFaultInfos, MCSymbolComparator>

      FunctionInfos;

  AsmPrinter ≈

  void emitFunctionInfo(const MCSymbol *FnLabel, const FunctionFaultInfos &FFI);

};

} // end namespace llvm

#endif // LLVM_CODEGEN_FAULTMAPS_H