2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
132 lines
3.9 KiB
C++
132 lines
3.9 KiB
C++
//===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/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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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<BinaryStream> Stream)
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: Stream(std::move(Stream)), Header(nullptr) {}
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Error InfoStream::reload() {
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BinaryStreamReader Reader(*Stream);
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if (auto EC = Reader.readObject(Header))
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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 (Header->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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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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Expected<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 make_error<RawError>(raw_error_code::no_stream);
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return Result;
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}
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StringMap<uint32_t> 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>(uint32_t(Header->Version));
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}
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uint32_t InfoStream::getSignature() const {
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return uint32_t(Header->Signature);
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}
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uint32_t InfoStream::getAge() const { return uint32_t(Header->Age); }
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GUID InfoStream::getGuid() const { return Header->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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