DWARFDebugAbbrev.h revision 360784 
1//===- DWARFDebugAbbrev.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_DWARFDEBUGABBREV_H
10#define LLVM_DEBUGINFO_DWARFDEBUGABBREV_H
11
12#include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h"
13#include "llvm/Support/DataExtractor.h"
14#include <cstdint>
15#include <map>
16#include <vector>
17
18namespace llvm {
19
20class raw_ostream;
21
22class DWARFAbbreviationDeclarationSet {
23  uint64_t Offset;
24  /// Code of the first abbreviation, if all abbreviations in the set have
25  /// consecutive codes. UINT32_MAX otherwise.
26  uint32_t FirstAbbrCode;
27  std::vector<DWARFAbbreviationDeclaration> Decls;
28
29  using const_iterator =
30      std::vector<DWARFAbbreviationDeclaration>::const_iterator;
31
32public:
33  DWARFAbbreviationDeclarationSet();
34
35  uint64_t getOffset() const { return Offset; }
36  void dump(raw_ostream &OS) const;
37  bool extract(DataExtractor Data, uint64_t *OffsetPtr);
38
39  const DWARFAbbreviationDeclaration *
40  getAbbreviationDeclaration(uint32_t AbbrCode) const;
41
42  const_iterator begin() const {
43    return Decls.begin();
44  }
45
46  const_iterator end() const {
47    return Decls.end();
48  }
49
50private:
51  void clear();
52};
53
54class DWARFDebugAbbrev {
55  using DWARFAbbreviationDeclarationSetMap =
56      std::map<uint64_t, DWARFAbbreviationDeclarationSet>;
57
58  mutable DWARFAbbreviationDeclarationSetMap AbbrDeclSets;
59  mutable DWARFAbbreviationDeclarationSetMap::const_iterator PrevAbbrOffsetPos;
60  mutable Optional<DataExtractor> Data;
61
62public:
63  DWARFDebugAbbrev();
64
65  const DWARFAbbreviationDeclarationSet *
66  getAbbreviationDeclarationSet(uint64_t CUAbbrOffset) const;
67
68  void dump(raw_ostream &OS) const;
69  void parse() const;
70  void extract(DataExtractor Data);
71
72  DWARFAbbreviationDeclarationSetMap::const_iterator begin() const {
73    parse();
74    return AbbrDeclSets.begin();
75  }
76
77  DWARFAbbreviationDeclarationSetMap::const_iterator end() const {
78    return AbbrDeclSets.end();
79  }
80
81private:
82  void clear();
83};
84
85} // end namespace llvm
86
87#endif // LLVM_DEBUGINFO_DWARFDEBUGABBREV_H
88