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      1 //===- DWARFGdbIndex.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_DWARFGDBINDEX_H
     10 #define LLVM_DEBUGINFO_DWARF_DWARFGDBINDEX_H
     11 
     12 #include "llvm/ADT/SmallVector.h"
     13 #include "llvm/ADT/StringRef.h"
     14 #include "llvm/Support/DataExtractor.h"
     15 #include <cstdint>
     16 #include <utility>
     17 
     18 namespace llvm {
     19 
     20 class raw_ostream;
     21 
     22 class DWARFGdbIndex {
     23   uint32_t Version;
     24 
     25   uint32_t CuListOffset;
     26   uint32_t TuListOffset;
     27   uint32_t AddressAreaOffset;
     28   uint32_t SymbolTableOffset;
     29   uint32_t ConstantPoolOffset;
     30 
     31   struct CompUnitEntry {
     32     uint64_t Offset; /// Offset of a CU in the .debug_info section.
     33     uint64_t Length; /// Length of that CU.
     34   };
     35   SmallVector<CompUnitEntry, 0> CuList;
     36 
     37   struct TypeUnitEntry {
     38     uint64_t Offset;
     39     uint64_t TypeOffset;
     40     uint64_t TypeSignature;
     41   };
     42   SmallVector<TypeUnitEntry, 0> TuList;
     43 
     44   struct AddressEntry {
     45     uint64_t LowAddress;  /// The low address.
     46     uint64_t HighAddress; /// The high address.
     47     uint32_t CuIndex;     /// The CU index.
     48   };
     49   SmallVector<AddressEntry, 0> AddressArea;
     50 
     51   struct SymTableEntry {
     52     uint32_t NameOffset; /// Offset of the symbol's name in the constant pool.
     53     uint32_t VecOffset;  /// Offset of the CU vector in the constant pool.
     54   };
     55   SmallVector<SymTableEntry, 0> SymbolTable;
     56 
     57   /// Each value is CU index + attributes.
     58   SmallVector<std::pair<uint32_t, SmallVector<uint32_t, 0>>, 0>
     59       ConstantPoolVectors;
     60 
     61   StringRef ConstantPoolStrings;
     62   uint32_t StringPoolOffset;
     63 
     64   void dumpCUList(raw_ostream &OS) const;
     65   void dumpTUList(raw_ostream &OS) const;
     66   void dumpAddressArea(raw_ostream &OS) const;
     67   void dumpSymbolTable(raw_ostream &OS) const;
     68   void dumpConstantPool(raw_ostream &OS) const;
     69 
     70   bool parseImpl(DataExtractor Data);
     71 
     72 public:
     73   void dump(raw_ostream &OS);
     74   void parse(DataExtractor Data);
     75 
     76   bool HasContent = false;
     77   bool HasError = false;
     78 };
     79 
     80 } // end namespace llvm
     81 
     82 #endif // LLVM_DEBUGINFO_DWARF_DWARFGDBINDEX_H
     83