text: //===- DWARF.h --------------------------------------------------*- 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 LLD_DWARF_H
  #define LLD_DWARF_H
  
  #include "lld/Common/LLVM.h"
  #include "llvm/ADT/DenseMap.h"
  #include "llvm/ADT/StringRef.h"
  #include "llvm/DebugInfo/DWARF/DWARFContext.h"
  #include "llvm/DebugInfo/DWARF/DWARFDebugLine.h"
  #include <memory>
  #include <string>
  
  namespace llvm {
  struct DILineInfo;
  } // namespace llvm
  
  namespace lld {
  
  class DWARFCache {
  public:
    DWARFCache(std::unique_ptr<llvm::DWARFContext> dwarf);
    llvm::Optional<llvm::DILineInfo> getDILineInfo(uint64_t offset,
                                                   uint64_t sectionIndex);
    llvm::Optional<std::pair<std::string, unsigned>>
    getVariableLoc(StringRef name);
  
    llvm::DWARFContext *getContext() { return dwarf.get(); }
  
  private:
    std::unique_ptr<llvm::DWARFContext> dwarf;
    std::vector<const llvm::DWARFDebugLine::LineTable *> lineTables;
    struct VarLoc {
      const llvm::DWARFDebugLine::LineTable *lt;
      unsigned file;
      unsigned line;
    };
    llvm::DenseMap<StringRef, VarLoc> variableLoc;
  };
  
  } // namespace lld
  
  #endif
  