140 lines
4.0 KiB
C++
140 lines
4.0 KiB
C++
//===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
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#include "llvm/ADT/BitVector.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
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#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
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#include "llvm/DebugInfo/PDB/Native/RawError.h"
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#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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using namespace llvm;
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using namespace llvm::codeview;
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using namespace llvm::msf;
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using namespace llvm::pdb;
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InfoStream::InfoStream(std::unique_ptr<MappedBlockStream> Stream)
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: Stream(std::move(Stream)) {}
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Error InfoStream::reload() {
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BinaryStreamReader Reader(*Stream);
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const InfoStreamHeader *H;
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if (auto EC = Reader.readObject(H))
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return joinErrors(
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std::move(EC),
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make_error<RawError>(raw_error_code::corrupt_file,
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"PDB Stream does not contain a header."));
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switch (H->Version) {
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case PdbImplVC70:
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case PdbImplVC80:
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case PdbImplVC110:
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case PdbImplVC140:
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break;
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default:
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return make_error<RawError>(raw_error_code::corrupt_file,
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"Unsupported PDB stream version.");
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}
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Version = H->Version;
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Signature = H->Signature;
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Age = H->Age;
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Guid = H->Guid;
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uint32_t Offset = Reader.getOffset();
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if (auto EC = NamedStreams.load(Reader))
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return EC;
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uint32_t NewOffset = Reader.getOffset();
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NamedStreamMapByteSize = NewOffset - Offset;
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Reader.setOffset(Offset);
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if (auto EC = Reader.readSubstream(SubNamedStreams, NamedStreamMapByteSize))
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return EC;
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bool Stop = false;
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while (!Stop && !Reader.empty()) {
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PdbRaw_FeatureSig Sig;
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if (auto EC = Reader.readEnum(Sig))
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return EC;
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// Since this value comes from a file, it's possible we have some strange
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// value which doesn't correspond to any value. We don't want to warn on
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// -Wcovered-switch-default in this case, so switch on the integral value
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// instead of the enumeration value.
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switch (uint32_t(Sig)) {
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case uint32_t(PdbRaw_FeatureSig::VC110):
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// No other flags for VC110 PDB.
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Stop = true;
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LLVM_FALLTHROUGH;
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case uint32_t(PdbRaw_FeatureSig::VC140):
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Features |= PdbFeatureContainsIdStream;
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break;
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case uint32_t(PdbRaw_FeatureSig::NoTypeMerge):
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Features |= PdbFeatureNoTypeMerging;
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break;
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case uint32_t(PdbRaw_FeatureSig::MinimalDebugInfo):
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Features |= PdbFeatureMinimalDebugInfo;
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break;
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default:
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continue;
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}
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FeatureSignatures.push_back(Sig);
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}
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return Error::success();
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}
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uint32_t InfoStream::getStreamSize() const { return Stream->getLength(); }
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uint32_t InfoStream::getNamedStreamIndex(llvm::StringRef Name) const {
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uint32_t Result;
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if (!NamedStreams.get(Name, Result))
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return 0;
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return Result;
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}
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iterator_range<StringMapConstIterator<uint32_t>>
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InfoStream::named_streams() const {
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return NamedStreams.entries();
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}
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bool InfoStream::containsIdStream() const {
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return !!(Features & PdbFeatureContainsIdStream);
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}
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PdbRaw_ImplVer InfoStream::getVersion() const {
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return static_cast<PdbRaw_ImplVer>(Version);
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}
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uint32_t InfoStream::getSignature() const { return Signature; }
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uint32_t InfoStream::getAge() const { return Age; }
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GUID InfoStream::getGuid() const { return Guid; }
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uint32_t InfoStream::getNamedStreamMapByteSize() const {
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return NamedStreamMapByteSize;
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}
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PdbRaw_Features InfoStream::getFeatures() const { return Features; }
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ArrayRef<PdbRaw_FeatureSig> InfoStream::getFeatureSignatures() const {
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return FeatureSignatures;
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}
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const NamedStreamMap &InfoStream::getNamedStreams() const {
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return NamedStreams;
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}
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BinarySubstreamRef InfoStream::getNamedStreamsBuffer() const {
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return SubNamedStreams;
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}
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