Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/lib/DebugInfo/PDB/Native/InfoStream.cpp

@@ -1,137 +0,0 @@
-//===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#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<MappedBlockStream> Stream)
-    : Stream(std::move(Stream)) {}
-
-Error InfoStream::reload() {
-  BinaryStreamReader Reader(*Stream);
-
-  const InfoStreamHeader *H;
-  if (auto EC = Reader.readObject(H))
-    return joinErrors(
-        std::move(EC),
-        make_error<RawError>(raw_error_code::corrupt_file,
-                             "PDB Stream does not contain a header."));
-
-  switch (H->Version) {
-  case PdbImplVC70:
-  case PdbImplVC80:
-  case PdbImplVC110:
-  case PdbImplVC140:
-    break;
-  default:
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Unsupported PDB stream version.");
-  }
-
-  Version = H->Version;
-  Signature = H->Signature;
-  Age = H->Age;
-  Guid = H->Guid;
-
-  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(); }
-
-uint32_t InfoStream::getNamedStreamIndex(llvm::StringRef Name) const {
-  uint32_t Result;
-  if (!NamedStreams.get(Name, Result))
-    return 0;
-  return Result;
-}
-
-iterator_range<StringMapConstIterator<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>(Version);
-}
-
-uint32_t InfoStream::getSignature() const { return Signature; }
-
-uint32_t InfoStream::getAge() const { return Age; }
-
-GUID InfoStream::getGuid() const { return 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;
-}