lld/MachO/Dwarf.h

   1 //===- DWARF.h -----------------------------------------------*- 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 #ifndef LLD_MACHO_DWARF_H
  10 #define LLD_MACHO_DWARF_H
  11
  12 #include "llvm/ADT/StringRef.h"
  13 #include "llvm/DebugInfo/DWARF/DWARFObject.h"
  14
  15 namespace lld::macho {
  16
  17 class ObjFile;
  18
  19 // Implements the interface between LLVM's DWARF-parsing utilities and LLD's
  20 // InputSection structures.
  21 class DwarfObject final : public llvm::DWARFObject {
  22 public:
  23   bool isLittleEndian() const override { return true; }
  24
  25   std::optional<llvm::RelocAddrEntry> find(const llvm::DWARFSection &sec,
  26                                            uint64_t pos) const override {
  27     // TODO: implement this
  28     return std::nullopt;
  29   }
  30
  31   void forEachInfoSections(
  32       llvm::function_ref<void(const llvm::DWARFSection &)> f) const override {
  33     f(infoSection);
  34   }
  35
  36   llvm::StringRef getAbbrevSection() const override { return abbrevSection; }
  37   llvm::StringRef getStrSection() const override { return strSection; }
  38
  39   llvm::DWARFSection const &getLineSection() const override {
  40     return lineSection;
  41   }
  42
  43   llvm::DWARFSection const &getStrOffsetsSection() const override {
  44     return strOffsSection;
  45   }
  46
  47   // Returns an instance of DwarfObject if the given object file has the
  48   // relevant DWARF debug sections.
  49   static std::unique_ptr<DwarfObject> create(ObjFile *);
  50
  51 private:
  52   llvm::DWARFSection infoSection;
  53   llvm::DWARFSection lineSection;
  54   llvm::DWARFSection strOffsSection;
  55   llvm::StringRef abbrevSection;
  56   llvm::StringRef strSection;
  57 };
  58
  59 } // namespace lld::macho
  60
  61 #endif