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aaa081a200
Older PDBs don't have this. Its presence is detected by using the various "feature" flags that come at the end of the PDB Stream. Detect this, and don't try to dump the ID stream if the features tells us it's not present. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305235 91177308-0d34-0410-b5e6-96231b3b80d8
132 lines
3.8 KiB
C++
132 lines
3.8 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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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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PDB_UniqueId 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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