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