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      1 //===- DWARFDebugPubTable.h -------------------------------------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGPUBTABLE_H
     11 #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGPUBTABLE_H
     12 
     13 #include "llvm/ADT/ArrayRef.h"
     14 #include "llvm/ADT/StringRef.h"
     15 #include "llvm/Support/Dwarf.h"
     16 #include <cstdint>
     17 #include <vector>
     18 
     19 namespace llvm {
     20 
     21 class raw_ostream;
     22 
     23 /// Represents structure for holding and parsing .debug_pub* tables.
     24 class DWARFDebugPubTable {
     25 public:
     26   struct Entry {
     27     /// Section offset from the beginning of the compilation unit.
     28     uint32_t SecOffset;
     29 
     30     /// An entry of the various gnu_pub* debug sections.
     31     dwarf::PubIndexEntryDescriptor Descriptor;
     32 
     33     /// The name of the object as given by the DW_AT_name attribute of the
     34     /// referenced DIE.
     35     const char *Name;
     36   };
     37 
     38   /// Each table consists of sets of variable length entries. Each set describes
     39   /// the names of global objects and functions, or global types, respectively,
     40   /// whose definitions are represented by debugging information entries owned
     41   /// by a single compilation unit.
     42   struct Set {
     43     /// The total length of the entries for that set, not including the length
     44     /// field itself.
     45     uint32_t Length;
     46 
     47     /// This number is specific to the name lookup table and is independent of
     48     /// the DWARF version number.
     49     uint16_t Version;
     50 
     51     /// The offset from the beginning of the .debug_info section of the
     52     /// compilation unit header referenced by the set.
     53     uint32_t Offset;
     54 
     55     /// The size in bytes of the contents of the .debug_info section generated
     56     /// to represent that compilation unit.
     57     uint32_t Size;
     58 
     59     std::vector<Entry> Entries;
     60   };
     61 
     62 private:
     63   std::vector<Set> Sets;
     64 
     65   /// gnu styled tables contains additional information.
     66   /// This flag determines whether or not section we parse is debug_gnu* table.
     67   bool GnuStyle;
     68 
     69 public:
     70   DWARFDebugPubTable(StringRef Data, bool LittleEndian, bool GnuStyle);
     71 
     72   void dump(StringRef Name, raw_ostream &OS) const;
     73 
     74   ArrayRef<Set> getData() { return Sets; }
     75 };
     76 
     77 } // end namespace llvm
     78 
     79 #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGPUBTABLE_H
     80