1 //===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/DebugInfo/PDB/Native/InfoStream.h"
11 #include "llvm/ADT/BitVector.h"
12 #include "llvm/ADT/SmallVector.h"
13 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
14 #include "llvm/DebugInfo/PDB/Native/RawConstants.h"
15 #include "llvm/DebugInfo/PDB/Native/RawError.h"
16 #include "llvm/DebugInfo/PDB/Native/RawTypes.h"
17 #include "llvm/Support/BinaryStreamReader.h"
18 #include "llvm/Support/BinaryStreamWriter.h"
21 using namespace llvm::codeview;
22 using namespace llvm::msf;
23 using namespace llvm::pdb;
25 InfoStream::InfoStream(std::unique_ptr<MappedBlockStream> Stream)
26 : Stream(std::move(Stream)) {}
28 Error InfoStream::reload() {
29 BinaryStreamReader Reader(*Stream);
31 const InfoStreamHeader *H;
32 if (auto EC = Reader.readObject(H))
35 make_error<RawError>(raw_error_code::corrupt_file,
36 "PDB Stream does not contain a header."));
45 return make_error<RawError>(raw_error_code::corrupt_file,
46 "Unsupported PDB stream version.");
50 Signature = H->Signature;
54 uint32_t Offset = Reader.getOffset();
55 if (auto EC = NamedStreams.load(Reader))
57 uint32_t NewOffset = Reader.getOffset();
58 NamedStreamMapByteSize = NewOffset - Offset;
61 while (!Stop && !Reader.empty()) {
62 PdbRaw_FeatureSig Sig;
63 if (auto EC = Reader.readEnum(Sig))
65 // Since this value comes from a file, it's possible we have some strange
66 // value which doesn't correspond to any value. We don't want to warn on
67 // -Wcovered-switch-default in this case, so switch on the integral value
68 // instead of the enumeration value.
69 switch (uint32_t(Sig)) {
70 case uint32_t(PdbRaw_FeatureSig::VC110):
71 // No other flags for VC110 PDB.
74 case uint32_t(PdbRaw_FeatureSig::VC140):
75 Features |= PdbFeatureContainsIdStream;
77 case uint32_t(PdbRaw_FeatureSig::NoTypeMerge):
78 Features |= PdbFeatureNoTypeMerging;
80 case uint32_t(PdbRaw_FeatureSig::MinimalDebugInfo):
81 Features |= PdbFeatureMinimalDebugInfo;
85 FeatureSignatures.push_back(Sig);
87 return Error::success();
90 uint32_t InfoStream::getStreamSize() const { return Stream->getLength(); }
92 uint32_t InfoStream::getNamedStreamIndex(llvm::StringRef Name) const {
94 if (!NamedStreams.get(Name, Result))
99 iterator_range<StringMapConstIterator<uint32_t>>
100 InfoStream::named_streams() const {
101 return NamedStreams.entries();
104 PdbRaw_ImplVer InfoStream::getVersion() const {
105 return static_cast<PdbRaw_ImplVer>(Version);
108 uint32_t InfoStream::getSignature() const { return Signature; }
110 uint32_t InfoStream::getAge() const { return Age; }
112 PDB_UniqueId InfoStream::getGuid() const { return Guid; }
114 uint32_t InfoStream::getNamedStreamMapByteSize() const {
115 return NamedStreamMapByteSize;
118 PdbRaw_Features InfoStream::getFeatures() const { return Features; }
120 ArrayRef<PdbRaw_FeatureSig> InfoStream::getFeatureSignatures() const {
121 return FeatureSignatures;
124 const NamedStreamMap &InfoStream::getNamedStreams() const {