contrib/llvm/include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h

   1 //===- DWARFAcceleratorTable.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_DWARFACCELERATORTABLE_H
  11 #define LLVM_DEBUGINFO_DWARFACCELERATORTABLE_H
  12
  13 #include "llvm/ADT/SmallVector.h"
  14 #include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
  15 #include "llvm/Support/DataExtractor.h"
  16 #include "llvm/Support/Dwarf.h"
  17 #include <cstdint>
  18 #include <utility>
  19
  20 namespace llvm {
  21
  22 class raw_ostream;
  23
  24 class DWARFAcceleratorTable {
  25   struct Header {
  26     uint32_t Magic;
  27     uint16_t Version;
  28     uint16_t HashFunction;
  29     uint32_t NumBuckets;
  30     uint32_t NumHashes;
  31     uint32_t HeaderDataLength;
  32   };
  33
  34   struct HeaderData {
  35     typedef uint16_t AtomType;
  36     typedef dwarf::Form Form;
  37     uint32_t DIEOffsetBase;
  38     SmallVector<std::pair<AtomType, Form>, 3> Atoms;
  39   };
  40
  41   struct Header Hdr;
  42   struct HeaderData HdrData;
  43   DataExtractor AccelSection;
  44   DataExtractor StringSection;
  45   const RelocAddrMap& Relocs;
  46
  47 public:
  48   DWARFAcceleratorTable(DataExtractor AccelSection, DataExtractor StringSection,
  49                         const RelocAddrMap &Relocs)
  50     : AccelSection(AccelSection), StringSection(StringSection), Relocs(Relocs) {}
  51
  52   bool extract();
  53   void dump(raw_ostream &OS) const;
  54 };
  55
  56 } // end namespace llvm
  57
  58 #endif // LLVM_DEBUGINFO_DWARFACCELERATORTABLE_H