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//===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
#include "llvm/DebugInfo/PDB/Native/RawError.h"
#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
#include "llvm/Support/BinaryStreamReader.h"
using namespace llvm;
using namespace llvm::codeview;
using namespace llvm::msf;
using namespace llvm::pdb;
InfoStream::InfoStream(std::unique_ptr<BinaryStream> Stream)
: Stream(std::move(Stream)), Header(nullptr) {}
Error InfoStream::reload() {
BinaryStreamReader Reader(*Stream);
if (auto EC = Reader.readObject(Header))
return joinErrors(
std::move(EC),
make_error<RawError>(raw_error_code::corrupt_file,
"PDB Stream does not contain a header."));
switch (Header->Version) {
case PdbImplVC70:
case PdbImplVC80:
case PdbImplVC110:
case PdbImplVC140:
break;
default:
return make_error<RawError>(raw_error_code::corrupt_file,
"Unsupported PDB stream version.");
}
uint32_t Offset = Reader.getOffset();
if (auto EC = NamedStreams.load(Reader))
return EC;
uint32_t NewOffset = Reader.getOffset();
NamedStreamMapByteSize = NewOffset - Offset;
Reader.setOffset(Offset);
if (auto EC = Reader.readSubstream(SubNamedStreams, NamedStreamMapByteSize))
return EC;
bool Stop = false;
while (!Stop && !Reader.empty()) {
PdbRaw_FeatureSig Sig;
if (auto EC = Reader.readEnum(Sig))
return EC;
// Since this value comes from a file, it's possible we have some strange
// value which doesn't correspond to any value. We don't want to warn on
// -Wcovered-switch-default in this case, so switch on the integral value
// instead of the enumeration value.
switch (uint32_t(Sig)) {
case uint32_t(PdbRaw_FeatureSig::VC110):
// No other flags for VC110 PDB.
Stop = true;
LLVM_FALLTHROUGH;
case uint32_t(PdbRaw_FeatureSig::VC140):
Features |= PdbFeatureContainsIdStream;
break;
case uint32_t(PdbRaw_FeatureSig::NoTypeMerge):
Features |= PdbFeatureNoTypeMerging;
break;
case uint32_t(PdbRaw_FeatureSig::MinimalDebugInfo):
Features |= PdbFeatureMinimalDebugInfo;
break;
default:
continue;
}
FeatureSignatures.push_back(Sig);
}
return Error::success();
}
uint32_t InfoStream::getStreamSize() const { return Stream->getLength(); }
Expected<uint32_t> InfoStream::getNamedStreamIndex(llvm::StringRef Name) const {
uint32_t Result;
if (!NamedStreams.get(Name, Result))
return make_error<RawError>(raw_error_code::no_stream);
return Result;
}
StringMap<uint32_t> InfoStream::named_streams() const {
return NamedStreams.entries();
}
bool InfoStream::containsIdStream() const {
return !!(Features & PdbFeatureContainsIdStream);
}
PdbRaw_ImplVer InfoStream::getVersion() const {
return static_cast<PdbRaw_ImplVer>(uint32_t(Header->Version));
}
uint32_t InfoStream::getSignature() const {
return uint32_t(Header->Signature);
}
uint32_t InfoStream::getAge() const { return uint32_t(Header->Age); }
GUID InfoStream::getGuid() const { return Header->Guid; }
uint32_t InfoStream::getNamedStreamMapByteSize() const {
return NamedStreamMapByteSize;
}
PdbRaw_Features InfoStream::getFeatures() const { return Features; }
ArrayRef<PdbRaw_FeatureSig> InfoStream::getFeatureSignatures() const {
return FeatureSignatures;
}
const NamedStreamMap &InfoStream::getNamedStreams() const {
return NamedStreams;
}
BinarySubstreamRef InfoStream::getNamedStreamsBuffer() const {
return SubNamedStreams;
}
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