LLVM  10.0.0svn
StringsAndChecksums.h
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1 //===- StringsAndChecksums.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_CODEVIEW_STRINGSANDCHECKSUMS_H
10 #define LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
11 
16 #include <memory>
17 
18 namespace llvm {
19 namespace codeview {
20 
22 public:
23  // If no subsections are known about initially, we find as much as we can.
25 
26  // If only a string table subsection is given, we find a checksums subsection.
28 
29  // If both subsections are given, we don't need to find anything.
31  const DebugChecksumsSubsectionRef &Checksums);
32 
33  void setStrings(const DebugStringTableSubsectionRef &Strings);
35 
36  void reset();
37  void resetStrings();
38  void resetChecksums();
39 
40  template <typename T> void initialize(T &&FragmentRange) {
41  for (const DebugSubsectionRecord &R : FragmentRange) {
42  if (Strings && Checksums)
43  return;
44  if (R.kind() == DebugSubsectionKind::FileChecksums) {
45  initializeChecksums(R);
46  continue;
47  }
48  if (R.kind() == DebugSubsectionKind::StringTable && !Strings) {
49  // While in practice we should never encounter a string table even
50  // though the string table is already initialized, in theory it's
51  // possible. PDBs are supposed to have one global string table and
52  // then this subsection should not appear. Whereas object files are
53  // supposed to have this subsection appear exactly once. However,
54  // for testing purposes it's nice to be able to test this subsection
55  // independently of one format or the other, so for some tests we
56  // manually construct a PDB that contains this subsection in addition
57  // to a global string table.
58  initializeStrings(R);
59  continue;
60  }
61  }
62  }
63 
64  const DebugStringTableSubsectionRef &strings() const { return *Strings; }
65  const DebugChecksumsSubsectionRef &checksums() const { return *Checksums; }
66 
67  bool hasStrings() const { return Strings != nullptr; }
68  bool hasChecksums() const { return Checksums != nullptr; }
69 
70 private:
71  void initializeStrings(const DebugSubsectionRecord &SR);
72  void initializeChecksums(const DebugSubsectionRecord &FCR);
73 
74  std::shared_ptr<DebugStringTableSubsectionRef> OwnedStrings;
75  std::shared_ptr<DebugChecksumsSubsectionRef> OwnedChecksums;
76 
77  const DebugStringTableSubsectionRef *Strings = nullptr;
78  const DebugChecksumsSubsectionRef *Checksums = nullptr;
79 };
80 
82 public:
83  using StringsPtr = std::shared_ptr<DebugStringTableSubsection>;
84  using ChecksumsPtr = std::shared_ptr<DebugChecksumsSubsection>;
85 
86  // If no subsections are known about initially, we find as much as we can.
87  StringsAndChecksums() = default;
88 
89  void setStrings(const StringsPtr &SP) { Strings = SP; }
90  void setChecksums(const ChecksumsPtr &CP) { Checksums = CP; }
91 
92  const StringsPtr &strings() const { return Strings; }
93  const ChecksumsPtr &checksums() const { return Checksums; }
94 
95  bool hasStrings() const { return Strings != nullptr; }
96  bool hasChecksums() const { return Checksums != nullptr; }
97 
98 private:
99  StringsPtr Strings;
100  ChecksumsPtr Checksums;
101 };
102 
103 } // end namespace codeview
104 } // end namespace llvm
105 
106 #endif // LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
std::shared_ptr< DebugChecksumsSubsection > ChecksumsPtr
This class represents lattice values for constants.
Definition: AllocatorList.h:23
const DebugStringTableSubsectionRef & strings() const
void setChecksums(const DebugChecksumsSubsectionRef &CS)
void setChecksums(const ChecksumsPtr &CP)
const ChecksumsPtr & checksums() const
void setStrings(const StringsPtr &SP)
const StringsPtr & strings() const
std::shared_ptr< DebugStringTableSubsection > StringsPtr
Represents a read-only view of a CodeView string table.
void setStrings(const DebugStringTableSubsectionRef &Strings)
const DebugChecksumsSubsectionRef & checksums() const