DWARFAcceleratorTable.h revision 284734 
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 <cstdint>
17
18namespace llvm {
19
20class DWARFAcceleratorTable {
21
22  struct Header {
23    uint32_t Magic;
24    uint16_t Version;
25    uint16_t HashFunction;
26    uint32_t NumBuckets;
27    uint32_t NumHashes;
28    uint32_t HeaderDataLength;
29  };
30
31  struct HeaderData {
32    typedef uint16_t AtomType;
33    typedef uint16_t Form;
34    uint32_t DIEOffsetBase;
35    SmallVector<std::pair<AtomType, Form>, 3> Atoms;
36  };
37
38  struct Header Hdr;
39  struct HeaderData HdrData;
40  DataExtractor AccelSection;
41  DataExtractor StringSection;
42  const RelocAddrMap& Relocs;
43public:
44  DWARFAcceleratorTable(DataExtractor AccelSection, DataExtractor StringSection,
45                        const RelocAddrMap &Relocs)
46    : AccelSection(AccelSection), StringSection(StringSection), Relocs(Relocs) {}
47
48  bool extract();
49  void dump(raw_ostream &OS) const;
50};
51
52} // namespace llvm
53
54#endif
55