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  1. //===- DWARFDebugPubTable.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 LLVM_DEBUGINFO_DWARF_DWARFDEBUGPUBTABLE_H
  10. #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGPUBTABLE_H
  11.  
  12. #include "llvm/ADT/ArrayRef.h"
  13. #include "llvm/ADT/STLFunctionalExtras.h"
  14. #include "llvm/ADT/StringRef.h"
  15. #include "llvm/BinaryFormat/Dwarf.h"
  16. #include <cstdint>
  17. #include <vector>
  18.  
  19. namespace llvm {
  20.  
  21. class raw_ostream;
  22. class DWARFDataExtractor;
  23. class Error;
  24.  
  25. /// Represents structure for holding and parsing .debug_pub* tables.
  26. class DWARFDebugPubTable {
  27. public:
  28.   struct Entry {
  29.     /// Section offset from the beginning of the compilation unit.
  30.     uint64_t SecOffset;
  31.  
  32.     /// An entry of the various gnu_pub* debug sections.
  33.     dwarf::PubIndexEntryDescriptor Descriptor;
  34.  
  35.     /// The name of the object as given by the DW_AT_name attribute of the
  36.     /// referenced DIE.
  37.     StringRef Name;
  38.   };
  39.  
  40.   /// Each table consists of sets of variable length entries. Each set describes
  41.   /// the names of global objects and functions, or global types, respectively,
  42.   /// whose definitions are represented by debugging information entries owned
  43.   /// by a single compilation unit.
  44.   struct Set {
  45.     /// The total length of the entries for that set, not including the length
  46.     /// field itself.
  47.     uint64_t Length;
  48.  
  49.     /// The DWARF format of the set.
  50.     dwarf::DwarfFormat Format;
  51.  
  52.     /// This number is specific to the name lookup table and is independent of
  53.     /// the DWARF version number.
  54.     uint16_t Version;
  55.  
  56.     /// The offset from the beginning of the .debug_info section of the
  57.     /// compilation unit header referenced by the set.
  58.     uint64_t Offset;
  59.  
  60.     /// The size in bytes of the contents of the .debug_info section generated
  61.     /// to represent that compilation unit.
  62.     uint64_t Size;
  63.  
  64.     std::vector<Entry> Entries;
  65.   };
  66.  
  67. private:
  68.   std::vector<Set> Sets;
  69.  
  70.   /// gnu styled tables contains additional information.
  71.   /// This flag determines whether or not section we parse is debug_gnu* table.
  72.   bool GnuStyle = false;
  73.  
  74. public:
  75.   DWARFDebugPubTable() = default;
  76.  
  77.   void extract(DWARFDataExtractor Data, bool GnuStyle,
  78.                function_ref<void(Error)> RecoverableErrorHandler);
  79.  
  80.   void dump(raw_ostream &OS) const;
  81.  
  82.   ArrayRef<Set> getData() { return Sets; }
  83. };
  84.  
  85. } // end namespace llvm
  86.  
  87. #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGPUBTABLE_H
  88.