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