Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/lib/DebugInfo/CodeView/AppendingTypeTableBuilder.cpp

@@ -0,0 +1,101 @@
+//===- AppendingTypeTableBuilder.cpp --------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/AppendingTypeTableBuilder.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/ContinuationRecordBuilder.h"
+#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
+#include "llvm/DebugInfo/CodeView/TypeIndex.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/BinaryByteStream.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+#include <cstring>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+TypeIndex AppendingTypeTableBuilder::nextTypeIndex() const {
+  return TypeIndex::fromArrayIndex(SeenRecords.size());
+}
+
+AppendingTypeTableBuilder::AppendingTypeTableBuilder(BumpPtrAllocator &Storage)
+    : RecordStorage(Storage) {}
+
+AppendingTypeTableBuilder::~AppendingTypeTableBuilder() = default;
+
+Optional<TypeIndex> AppendingTypeTableBuilder::getFirst() {
+  if (empty())
+    return None;
+
+  return TypeIndex(TypeIndex::FirstNonSimpleIndex);
+}
+
+Optional<TypeIndex> AppendingTypeTableBuilder::getNext(TypeIndex Prev) {
+  if (++Prev == nextTypeIndex())
+    return None;
+  return Prev;
+}
+
+CVType AppendingTypeTableBuilder::getType(TypeIndex Index) {
+  CVType Type;
+  Type.RecordData = SeenRecords[Index.toArrayIndex()];
+  const RecordPrefix *P =
+      reinterpret_cast<const RecordPrefix *>(Type.RecordData.data());
+  Type.Type = static_cast<TypeLeafKind>(uint16_t(P->RecordKind));
+  return Type;
+}
+
+StringRef AppendingTypeTableBuilder::getTypeName(TypeIndex Index) {
+  llvm_unreachable("Method not implemented");
+}
+
+bool AppendingTypeTableBuilder::contains(TypeIndex Index) {
+  if (Index.isSimple() || Index.isNoneType())
+    return false;
+
+  return Index.toArrayIndex() < SeenRecords.size();
+}
+
+uint32_t AppendingTypeTableBuilder::size() { return SeenRecords.size(); }
+
+uint32_t AppendingTypeTableBuilder::capacity() { return SeenRecords.size(); }
+
+ArrayRef<ArrayRef<uint8_t>> AppendingTypeTableBuilder::records() const {
+  return SeenRecords;
+}
+
+void AppendingTypeTableBuilder::reset() { SeenRecords.clear(); }
+
+TypeIndex
+AppendingTypeTableBuilder::insertRecordBytes(ArrayRef<uint8_t> &Record) {
+  TypeIndex NewTI = nextTypeIndex();
+  uint8_t *Stable = RecordStorage.Allocate<uint8_t>(Record.size());
+  memcpy(Stable, Record.data(), Record.size());
+  Record = ArrayRef<uint8_t>(Stable, Record.size());
+  SeenRecords.push_back(Record);
+  return NewTI;
+}
+
+TypeIndex
+AppendingTypeTableBuilder::insertRecord(ContinuationRecordBuilder &Builder) {
+  TypeIndex TI;
+  auto Fragments = Builder.end(nextTypeIndex());
+  assert(!Fragments.empty());
+  for (auto C : Fragments)
+    TI = insertRecordBytes(C.RecordData);
+  return TI;
+}

external/llvm/lib/DebugInfo/CodeView/CMakeLists.txt

@@ -0,0 +1,43 @@
+add_llvm_library(LLVMDebugInfoCodeView
+  AppendingTypeTableBuilder.cpp
+  CodeViewError.cpp
+  CodeViewRecordIO.cpp
+  ContinuationRecordBuilder.cpp
+  CVSymbolVisitor.cpp
+  CVTypeVisitor.cpp
+  DebugChecksumsSubsection.cpp
+  DebugCrossExSubsection.cpp
+  DebugCrossImpSubsection.cpp
+  DebugFrameDataSubsection.cpp
+  DebugInlineeLinesSubsection.cpp
+  DebugLinesSubsection.cpp
+  DebugStringTableSubsection.cpp
+  DebugSubsection.cpp
+  DebugSubsectionRecord.cpp
+  DebugSubsectionVisitor.cpp
+  DebugSymbolRVASubsection.cpp
+  DebugSymbolsSubsection.cpp
+  EnumTables.cpp
+  Formatters.cpp
+  GlobalTypeTableBuilder.cpp
+  LazyRandomTypeCollection.cpp
+  Line.cpp
+  MergingTypeTableBuilder.cpp
+  RecordName.cpp
+  RecordSerialization.cpp
+  SimpleTypeSerializer.cpp
+  StringsAndChecksums.cpp
+  SymbolRecordMapping.cpp
+  SymbolDumper.cpp
+  SymbolSerializer.cpp
+  TypeDumpVisitor.cpp
+  TypeIndex.cpp
+  TypeIndexDiscovery.cpp
+  TypeHashing.cpp
+  TypeRecordMapping.cpp
+  TypeStreamMerger.cpp
+  TypeTableCollection.cpp
+
+  ADDITIONAL_HEADER_DIRS
+  ${LLVM_MAIN_INCLUDE_DIR}/llvm/DebugInfo/CodeView
+  )

external/llvm/lib/DebugInfo/CodeView/CVSymbolVisitor.cpp

@@ -0,0 +1,83 @@
+//===- CVSymbolVisitor.cpp --------------------------------------*- 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/CodeView/CVSymbolVisitor.h"
+
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+CVSymbolVisitor::CVSymbolVisitor(SymbolVisitorCallbacks &Callbacks)
+    : Callbacks(Callbacks) {}
+
+template <typename T>
+static Error visitKnownRecord(CVSymbol &Record,
+                              SymbolVisitorCallbacks &Callbacks) {
+  SymbolRecordKind RK = static_cast<SymbolRecordKind>(Record.Type);
+  T KnownRecord(RK);
+  if (auto EC = Callbacks.visitKnownRecord(Record, KnownRecord))
+    return EC;
+  return Error::success();
+}
+
+static Error finishVisitation(CVSymbol &Record,
+                              SymbolVisitorCallbacks &Callbacks) {
+  switch (Record.Type) {
+  default:
+    if (auto EC = Callbacks.visitUnknownSymbol(Record))
+      return EC;
+    break;
+#define SYMBOL_RECORD(EnumName, EnumVal, Name)                                 \
+  case EnumName: {                                                             \
+    if (auto EC = visitKnownRecord<Name>(Record, Callbacks))                   \
+      return EC;                                                               \
+    break;                                                                     \
+  }
+#define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)                \
+  SYMBOL_RECORD(EnumVal, EnumVal, AliasName)
+#include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
+  }
+
+  if (auto EC = Callbacks.visitSymbolEnd(Record))
+    return EC;
+
+  return Error::success();
+}
+
+Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record) {
+  if (auto EC = Callbacks.visitSymbolBegin(Record))
+    return EC;
+  return finishVisitation(Record, Callbacks);
+}
+
+Error CVSymbolVisitor::visitSymbolRecord(CVSymbol &Record, uint32_t Offset) {
+  if (auto EC = Callbacks.visitSymbolBegin(Record, Offset))
+    return EC;
+  return finishVisitation(Record, Callbacks);
+}
+
+Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols) {
+  for (auto I : Symbols) {
+    if (auto EC = visitSymbolRecord(I))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CVSymbolVisitor::visitSymbolStream(const CVSymbolArray &Symbols,
+                                         uint32_t InitialOffset) {
+  for (auto I : Symbols) {
+    if (auto EC = visitSymbolRecord(I, InitialOffset))
+      return EC;
+    InitialOffset += I.length();
+  }
+  return Error::success();
+}

external/llvm/lib/DebugInfo/CodeView/CVTypeVisitor.cpp

@@ -0,0 +1,275 @@
+//===- CVTypeVisitor.cpp ----------------------------------------*- 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/CodeView/CVTypeVisitor.h"
+
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/TypeCollection.h"
+#include "llvm/DebugInfo/CodeView/TypeDeserializer.h"
+#include "llvm/DebugInfo/CodeView/TypeRecordMapping.h"
+#include "llvm/DebugInfo/CodeView/TypeVisitorCallbackPipeline.h"
+#include "llvm/Support/BinaryByteStream.h"
+#include "llvm/Support/BinaryStreamReader.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+
+template <typename T>
+static Error visitKnownRecord(CVType &Record, TypeVisitorCallbacks &Callbacks) {
+  TypeRecordKind RK = static_cast<TypeRecordKind>(Record.Type);
+  T KnownRecord(RK);
+  if (auto EC = Callbacks.visitKnownRecord(Record, KnownRecord))
+    return EC;
+  return Error::success();
+}
+
+template <typename T>
+static Error visitKnownMember(CVMemberRecord &Record,
+                              TypeVisitorCallbacks &Callbacks) {
+  TypeRecordKind RK = static_cast<TypeRecordKind>(Record.Kind);
+  T KnownRecord(RK);
+  if (auto EC = Callbacks.visitKnownMember(Record, KnownRecord))
+    return EC;
+  return Error::success();
+}
+
+static Error visitMemberRecord(CVMemberRecord &Record,
+                               TypeVisitorCallbacks &Callbacks) {
+  if (auto EC = Callbacks.visitMemberBegin(Record))
+    return EC;
+
+  switch (Record.Kind) {
+  default:
+    if (auto EC = Callbacks.visitUnknownMember(Record))
+      return EC;
+    break;
+#define MEMBER_RECORD(EnumName, EnumVal, Name)                                 \
+  case EnumName: {                                                             \
+    if (auto EC = visitKnownMember<Name##Record>(Record, Callbacks))           \
+      return EC;                                                               \
+    break;                                                                     \
+  }
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)                \
+  MEMBER_RECORD(EnumVal, EnumVal, AliasName)
+#define TYPE_RECORD(EnumName, EnumVal, Name)
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+  }
+
+  if (auto EC = Callbacks.visitMemberEnd(Record))
+    return EC;
+
+  return Error::success();
+}
+
+namespace {
+
+class CVTypeVisitor {
+public:
+  explicit CVTypeVisitor(TypeVisitorCallbacks &Callbacks);
+
+  Error visitTypeRecord(CVType &Record, TypeIndex Index);
+  Error visitTypeRecord(CVType &Record);
+
+  /// Visits the type records in Data. Sets the error flag on parse failures.
+  Error visitTypeStream(const CVTypeArray &Types);
+  Error visitTypeStream(CVTypeRange Types);
+  Error visitTypeStream(TypeCollection &Types);
+
+  Error visitMemberRecord(CVMemberRecord Record);
+  Error visitFieldListMemberStream(BinaryStreamReader &Stream);
+
+private:
+  Error finishVisitation(CVType &Record);
+
+  /// The interface to the class that gets notified of each visitation.
+  TypeVisitorCallbacks &Callbacks;
+};
+
+CVTypeVisitor::CVTypeVisitor(TypeVisitorCallbacks &Callbacks)
+    : Callbacks(Callbacks) {}
+
+Error CVTypeVisitor::finishVisitation(CVType &Record) {
+  switch (Record.Type) {
+  default:
+    if (auto EC = Callbacks.visitUnknownType(Record))
+      return EC;
+    break;
+#define TYPE_RECORD(EnumName, EnumVal, Name)                                   \
+  case EnumName: {                                                             \
+    if (auto EC = visitKnownRecord<Name##Record>(Record, Callbacks))           \
+      return EC;                                                               \
+    break;                                                                     \
+  }
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)                  \
+  TYPE_RECORD(EnumVal, EnumVal, AliasName)
+#define MEMBER_RECORD(EnumName, EnumVal, Name)
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+  }
+
+  if (auto EC = Callbacks.visitTypeEnd(Record))
+    return EC;
+
+  return Error::success();
+}
+
+Error CVTypeVisitor::visitTypeRecord(CVType &Record, TypeIndex Index) {
+  if (auto EC = Callbacks.visitTypeBegin(Record, Index))
+    return EC;
+
+  return finishVisitation(Record);
+}
+
+Error CVTypeVisitor::visitTypeRecord(CVType &Record) {
+  if (auto EC = Callbacks.visitTypeBegin(Record))
+    return EC;
+
+  return finishVisitation(Record);
+}
+
+Error CVTypeVisitor::visitMemberRecord(CVMemberRecord Record) {
+  return ::visitMemberRecord(Record, Callbacks);
+}
+
+/// Visits the type records in Data. Sets the error flag on parse failures.
+Error CVTypeVisitor::visitTypeStream(const CVTypeArray &Types) {
+  for (auto I : Types) {
+    if (auto EC = visitTypeRecord(I))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CVTypeVisitor::visitTypeStream(CVTypeRange Types) {
+  for (auto I : Types) {
+    if (auto EC = visitTypeRecord(I))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CVTypeVisitor::visitTypeStream(TypeCollection &Types) {
+  Optional<TypeIndex> I = Types.getFirst();
+  while (I) {
+    CVType Type = Types.getType(*I);
+    if (auto EC = visitTypeRecord(Type, *I))
+      return EC;
+    I = Types.getNext(*I);
+  }
+  return Error::success();
+}
+
+Error CVTypeVisitor::visitFieldListMemberStream(BinaryStreamReader &Reader) {
+  TypeLeafKind Leaf;
+  while (!Reader.empty()) {
+    if (auto EC = Reader.readEnum(Leaf))
+      return EC;
+
+    CVMemberRecord Record;
+    Record.Kind = Leaf;
+    if (auto EC = ::visitMemberRecord(Record, Callbacks))
+      return EC;
+  }
+
+  return Error::success();
+}
+
+struct FieldListVisitHelper {
+  FieldListVisitHelper(TypeVisitorCallbacks &Callbacks, ArrayRef<uint8_t> Data,
+                       VisitorDataSource Source)
+      : Stream(Data, llvm::support::little), Reader(Stream),
+        Deserializer(Reader),
+        Visitor((Source == VDS_BytesPresent) ? Pipeline : Callbacks) {
+    if (Source == VDS_BytesPresent) {
+      Pipeline.addCallbackToPipeline(Deserializer);
+      Pipeline.addCallbackToPipeline(Callbacks);
+    }
+  }
+
+  BinaryByteStream Stream;
+  BinaryStreamReader Reader;
+  FieldListDeserializer Deserializer;
+  TypeVisitorCallbackPipeline Pipeline;
+  CVTypeVisitor Visitor;
+};
+
+struct VisitHelper {
+  VisitHelper(TypeVisitorCallbacks &Callbacks, VisitorDataSource Source)
+      : Visitor((Source == VDS_BytesPresent) ? Pipeline : Callbacks) {
+    if (Source == VDS_BytesPresent) {
+      Pipeline.addCallbackToPipeline(Deserializer);
+      Pipeline.addCallbackToPipeline(Callbacks);
+    }
+  }
+
+  TypeDeserializer Deserializer;
+  TypeVisitorCallbackPipeline Pipeline;
+  CVTypeVisitor Visitor;
+};
+}
+
+Error llvm::codeview::visitTypeRecord(CVType &Record, TypeIndex Index,
+                                      TypeVisitorCallbacks &Callbacks,
+                                      VisitorDataSource Source) {
+  VisitHelper V(Callbacks, Source);
+  return V.Visitor.visitTypeRecord(Record, Index);
+}
+
+Error llvm::codeview::visitTypeRecord(CVType &Record,
+                                      TypeVisitorCallbacks &Callbacks,
+                                      VisitorDataSource Source) {
+  VisitHelper V(Callbacks, Source);
+  return V.Visitor.visitTypeRecord(Record);
+}
+
+Error llvm::codeview::visitTypeStream(const CVTypeArray &Types,
+                                      TypeVisitorCallbacks &Callbacks,
+                                      VisitorDataSource Source) {
+  VisitHelper V(Callbacks, Source);
+  return V.Visitor.visitTypeStream(Types);
+}
+
+Error llvm::codeview::visitTypeStream(CVTypeRange Types,
+                                      TypeVisitorCallbacks &Callbacks) {
+  VisitHelper V(Callbacks, VDS_BytesPresent);
+  return V.Visitor.visitTypeStream(Types);
+}
+
+Error llvm::codeview::visitTypeStream(TypeCollection &Types,
+                                      TypeVisitorCallbacks &Callbacks) {
+  // When the internal visitor calls Types.getType(Index) the interface is
+  // required to return a CVType with the bytes filled out.  So we can assume
+  // that the bytes will be present when individual records are visited.
+  VisitHelper V(Callbacks, VDS_BytesPresent);
+  return V.Visitor.visitTypeStream(Types);
+}
+
+Error llvm::codeview::visitMemberRecord(CVMemberRecord Record,
+                                        TypeVisitorCallbacks &Callbacks,
+                                        VisitorDataSource Source) {
+  FieldListVisitHelper V(Callbacks, Record.Data, Source);
+  return V.Visitor.visitMemberRecord(Record);
+}
+
+Error llvm::codeview::visitMemberRecord(TypeLeafKind Kind,
+                                        ArrayRef<uint8_t> Record,
+                                        TypeVisitorCallbacks &Callbacks) {
+  CVMemberRecord R;
+  R.Data = Record;
+  R.Kind = Kind;
+  return visitMemberRecord(R, Callbacks, VDS_BytesPresent);
+}
+
+Error llvm::codeview::visitMemberRecordStream(ArrayRef<uint8_t> FieldList,
+                                              TypeVisitorCallbacks &Callbacks) {
+  FieldListVisitHelper V(Callbacks, FieldList, VDS_BytesPresent);
+  return V.Visitor.visitFieldListMemberStream(V.Reader);
+}

external/llvm/lib/DebugInfo/CodeView/CodeViewError.cpp

@@ -0,0 +1,71 @@
+//===- CodeViewError.cpp - Error extensions for CodeView --------*- 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/CodeView/CodeViewError.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+namespace {
+// FIXME: This class is only here to support the transition to llvm::Error. It
+// will be removed once this transition is complete. Clients should prefer to
+// deal with the Error value directly, rather than converting to error_code.
+class CodeViewErrorCategory : public std::error_category {
+public:
+  const char *name() const noexcept override { return "llvm.codeview"; }
+
+  std::string message(int Condition) const override {
+    switch (static_cast<cv_error_code>(Condition)) {
+    case cv_error_code::unspecified:
+      return "An unknown error has occurred.";
+    case cv_error_code::insufficient_buffer:
+      return "The buffer is not large enough to read the requested number of "
+             "bytes.";
+    case cv_error_code::corrupt_record:
+      return "The CodeView record is corrupted.";
+    case cv_error_code::no_records:
+      return "There are no records";
+    case cv_error_code::operation_unsupported:
+      return "The requested operation is not supported.";
+    case cv_error_code::unknown_member_record:
+      return "The member record is of an unknown type.";
+    }
+    llvm_unreachable("Unrecognized cv_error_code");
+  }
+};
+} // end anonymous namespace
+
+static ManagedStatic<CodeViewErrorCategory> Category;
+
+char CodeViewError::ID = 0;
+
+CodeViewError::CodeViewError(cv_error_code C) : CodeViewError(C, "") {}
+
+CodeViewError::CodeViewError(const std::string &Context)
+    : CodeViewError(cv_error_code::unspecified, Context) {}
+
+CodeViewError::CodeViewError(cv_error_code C, const std::string &Context)
+    : Code(C) {
+  ErrMsg = "CodeView Error: ";
+  std::error_code EC = convertToErrorCode();
+  if (Code != cv_error_code::unspecified)
+    ErrMsg += EC.message() + "  ";
+  if (!Context.empty())
+    ErrMsg += Context;
+}
+
+void CodeViewError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
+
+const std::string &CodeViewError::getErrorMessage() const { return ErrMsg; }
+
+std::error_code CodeViewError::convertToErrorCode() const {
+  return std::error_code(static_cast<int>(Code), *Category);
+}

external/llvm/lib/DebugInfo/CodeView/CodeViewRecordIO.cpp

@@ -0,0 +1,257 @@
+//===- CodeViewRecordIO.cpp -------------------------------------*- 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/CodeView/CodeViewRecordIO.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error CodeViewRecordIO::beginRecord(Optional<uint32_t> MaxLength) {
+  RecordLimit Limit;
+  Limit.MaxLength = MaxLength;
+  Limit.BeginOffset = getCurrentOffset();
+  Limits.push_back(Limit);
+  return Error::success();
+}
+
+Error CodeViewRecordIO::endRecord() {
+  assert(!Limits.empty() && "Not in a record!");
+  Limits.pop_back();
+  // We would like to assert that we actually read / wrote all the bytes that we
+  // expected to for this record, but unfortunately we can't do this.  Some
+  // producers such as MASM over-allocate for certain types of records and
+  // commit the extraneous data, so when reading we can't be sure every byte
+  // will have been read.  And when writing we over-allocate temporarily since
+  // we don't know how big the record is until we're finished writing it, so
+  // even though we don't commit the extraneous data, we still can't guarantee
+  // we're at the end of the allocated data.
+  return Error::success();
+}
+
+uint32_t CodeViewRecordIO::maxFieldLength() const {
+  assert(!Limits.empty() && "Not in a record!");
+
+  // The max length of the next field is the minimum of all lengths that would
+  // be allowed by any of the sub-records we're in.  In practice, we can only
+  // ever be at most 1 sub-record deep (in a FieldList), but this works for
+  // the general case.
+  uint32_t Offset = getCurrentOffset();
+  Optional<uint32_t> Min = Limits.front().bytesRemaining(Offset);
+  for (auto X : makeArrayRef(Limits).drop_front()) {
+    Optional<uint32_t> ThisMin = X.bytesRemaining(Offset);
+    if (ThisMin.hasValue())
+      Min = (Min.hasValue()) ? std::min(*Min, *ThisMin) : *ThisMin;
+  }
+  assert(Min.hasValue() && "Every field must have a maximum length!");
+
+  return *Min;
+}
+
+Error CodeViewRecordIO::padToAlignment(uint32_t Align) {
+  if (isReading())
+    return Reader->padToAlignment(Align);
+  return Writer->padToAlignment(Align);
+}
+
+Error CodeViewRecordIO::skipPadding() {
+  assert(!isWriting() && "Cannot skip padding while writing!");
+
+  if (Reader->bytesRemaining() == 0)
+    return Error::success();
+
+  uint8_t Leaf = Reader->peek();
+  if (Leaf < LF_PAD0)
+    return Error::success();
+  // Leaf is greater than 0xf0. We should advance by the number of bytes in
+  // the low 4 bits.
+  unsigned BytesToAdvance = Leaf & 0x0F;
+  return Reader->skip(BytesToAdvance);
+}
+
+Error CodeViewRecordIO::mapByteVectorTail(ArrayRef<uint8_t> &Bytes) {
+  if (isWriting()) {
+    if (auto EC = Writer->writeBytes(Bytes))
+      return EC;
+  } else {
+    if (auto EC = Reader->readBytes(Bytes, Reader->bytesRemaining()))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapByteVectorTail(std::vector<uint8_t> &Bytes) {
+  ArrayRef<uint8_t> BytesRef(Bytes);
+  if (auto EC = mapByteVectorTail(BytesRef))
+    return EC;
+  if (!isWriting())
+    Bytes.assign(BytesRef.begin(), BytesRef.end());
+
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapInteger(TypeIndex &TypeInd) {
+  if (isWriting()) {
+    if (auto EC = Writer->writeInteger(TypeInd.getIndex()))
+      return EC;
+    return Error::success();
+  }
+
+  uint32_t I;
+  if (auto EC = Reader->readInteger(I))
+    return EC;
+  TypeInd.setIndex(I);
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapEncodedInteger(int64_t &Value) {
+  if (isWriting()) {
+    if (Value >= 0) {
+      if (auto EC = writeEncodedUnsignedInteger(static_cast<uint64_t>(Value)))
+        return EC;
+    } else {
+      if (auto EC = writeEncodedSignedInteger(Value))
+        return EC;
+    }
+  } else {
+    APSInt N;
+    if (auto EC = consume(*Reader, N))
+      return EC;
+    Value = N.getExtValue();
+  }
+
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapEncodedInteger(uint64_t &Value) {
+  if (isWriting()) {
+    if (auto EC = writeEncodedUnsignedInteger(Value))
+      return EC;
+  } else {
+    APSInt N;
+    if (auto EC = consume(*Reader, N))
+      return EC;
+    Value = N.getZExtValue();
+  }
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapEncodedInteger(APSInt &Value) {
+  if (isWriting()) {
+    if (Value.isSigned())
+      return writeEncodedSignedInteger(Value.getSExtValue());
+    return writeEncodedUnsignedInteger(Value.getZExtValue());
+  }
+
+  return consume(*Reader, Value);
+}
+
+Error CodeViewRecordIO::mapStringZ(StringRef &Value) {
+  if (isWriting()) {
+    // Truncate if we attempt to write too much.
+    StringRef S = Value.take_front(maxFieldLength() - 1);
+    if (auto EC = Writer->writeCString(S))
+      return EC;
+  } else {
+    if (auto EC = Reader->readCString(Value))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapGuid(GUID &Guid) {
+  constexpr uint32_t GuidSize = 16;
+  if (maxFieldLength() < GuidSize)
+    return make_error<CodeViewError>(cv_error_code::insufficient_buffer);
+
+  if (isWriting()) {
+    if (auto EC = Writer->writeBytes(Guid.Guid))
+      return EC;
+  } else {
+    ArrayRef<uint8_t> GuidBytes;
+    if (auto EC = Reader->readBytes(GuidBytes, GuidSize))
+      return EC;
+    memcpy(Guid.Guid, GuidBytes.data(), GuidSize);
+  }
+  return Error::success();
+}
+
+Error CodeViewRecordIO::mapStringZVectorZ(std::vector<StringRef> &Value) {
+  if (isWriting()) {
+    for (auto V : Value) {
+      if (auto EC = mapStringZ(V))
+        return EC;
+    }
+    if (auto EC = Writer->writeInteger<uint8_t>(0))
+      return EC;
+  } else {
+    StringRef S;
+    if (auto EC = mapStringZ(S))
+      return EC;
+    while (!S.empty()) {
+      Value.push_back(S);
+      if (auto EC = mapStringZ(S))
+        return EC;
+    };
+  }
+  return Error::success();
+}
+
+Error CodeViewRecordIO::writeEncodedSignedInteger(const int64_t &Value) {
+  assert(Value < 0 && "Encoded integer is not signed!");
+  if (Value >= std::numeric_limits<int8_t>::min()) {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_CHAR))
+      return EC;
+    if (auto EC = Writer->writeInteger<int8_t>(Value))
+      return EC;
+  } else if (Value >= std::numeric_limits<int16_t>::min()) {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_SHORT))
+      return EC;
+    if (auto EC = Writer->writeInteger<int16_t>(Value))
+      return EC;
+  } else if (Value >= std::numeric_limits<int32_t>::min()) {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_LONG))
+      return EC;
+    if (auto EC = Writer->writeInteger<int32_t>(Value))
+      return EC;
+  } else {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_QUADWORD))
+      return EC;
+    if (auto EC = Writer->writeInteger(Value))
+      return EC;
+  }
+  return Error::success();
+}
+
+Error CodeViewRecordIO::writeEncodedUnsignedInteger(const uint64_t &Value) {
+  if (Value < LF_NUMERIC) {
+    if (auto EC = Writer->writeInteger<uint16_t>(Value))
+      return EC;
+  } else if (Value <= std::numeric_limits<uint16_t>::max()) {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_USHORT))
+      return EC;
+    if (auto EC = Writer->writeInteger<uint16_t>(Value))
+      return EC;
+  } else if (Value <= std::numeric_limits<uint32_t>::max()) {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_ULONG))
+      return EC;
+    if (auto EC = Writer->writeInteger<uint32_t>(Value))
+      return EC;
+  } else {
+    if (auto EC = Writer->writeInteger<uint16_t>(LF_UQUADWORD))
+      return EC;
+    if (auto EC = Writer->writeInteger(Value))
+      return EC;
+  }
+
+  return Error::success();
+}

external/llvm/lib/DebugInfo/CodeView/ContinuationRecordBuilder.cpp

@@ -0,0 +1,259 @@
+#include "llvm/DebugInfo/CodeView/ContinuationRecordBuilder.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+namespace {
+struct ContinuationRecord {
+  ulittle16_t Kind{uint16_t(TypeLeafKind::LF_INDEX)};
+  ulittle16_t Size{0};
+  ulittle32_t IndexRef{0xB0C0B0C0};
+};
+
+struct SegmentInjection {
+  SegmentInjection(TypeLeafKind Kind) { Prefix.RecordKind = Kind; }
+
+  ContinuationRecord Cont;
+  RecordPrefix Prefix;
+};
+} // namespace
+
+static void addPadding(BinaryStreamWriter &Writer) {
+  uint32_t Align = Writer.getOffset() % 4;
+  if (Align == 0)
+    return;
+
+  int PaddingBytes = 4 - Align;
+  while (PaddingBytes > 0) {
+    uint8_t Pad = static_cast<uint8_t>(LF_PAD0 + PaddingBytes);
+    cantFail(Writer.writeInteger(Pad));
+    --PaddingBytes;
+  }
+}
+
+static SegmentInjection InjectFieldList(TypeLeafKind::LF_FIELDLIST);
+static SegmentInjection InjectMethodOverloadList(TypeLeafKind::LF_METHODLIST);
+
+static constexpr uint32_t ContinuationLength = sizeof(ContinuationRecord);
+static constexpr uint32_t MaxSegmentLength =
+    MaxRecordLength - ContinuationLength;
+
+static inline TypeLeafKind getTypeLeafKind(ContinuationRecordKind CK) {
+  return (CK == ContinuationRecordKind::FieldList) ? LF_FIELDLIST
+                                                   : LF_METHODLIST;
+}
+
+ContinuationRecordBuilder::ContinuationRecordBuilder()
+    : SegmentWriter(Buffer), Mapping(SegmentWriter) {}
+
+ContinuationRecordBuilder::~ContinuationRecordBuilder() {}
+
+void ContinuationRecordBuilder::begin(ContinuationRecordKind RecordKind) {
+  assert(!Kind.hasValue());
+  Kind = RecordKind;
+  Buffer.clear();
+  SegmentWriter.setOffset(0);
+  SegmentOffsets.clear();
+  SegmentOffsets.push_back(0);
+  assert(SegmentWriter.getOffset() == 0);
+  assert(SegmentWriter.getLength() == 0);
+
+  const SegmentInjection *FLI =
+      (RecordKind == ContinuationRecordKind::FieldList)
+          ? &InjectFieldList
+          : &InjectMethodOverloadList;
+  const uint8_t *FLIB = reinterpret_cast<const uint8_t *>(FLI);
+  InjectedSegmentBytes =
+      ArrayRef<uint8_t>(FLIB, FLIB + sizeof(SegmentInjection));
+
+  CVType Type;
+  Type.Type = getTypeLeafKind(RecordKind);
+  cantFail(Mapping.visitTypeBegin(Type));
+
+  // Seed the first trecord with an appropriate record prefix.
+  RecordPrefix Prefix;
+  Prefix.RecordLen = 0;
+  Prefix.RecordKind = Type.Type;
+  cantFail(SegmentWriter.writeObject(Prefix));
+}
+
+template <typename RecordType>
+void ContinuationRecordBuilder::writeMemberType(RecordType &Record) {
+  assert(Kind.hasValue());
+
+  uint32_t OriginalOffset = SegmentWriter.getOffset();
+  CVMemberRecord CVMR;
+  CVMR.Kind = static_cast<TypeLeafKind>(Record.getKind());
+
+  // Member Records aren't length-prefixed, they only have a 2-byte TypeLeafKind
+  // at the beginning.
+  cantFail(SegmentWriter.writeEnum(CVMR.Kind));
+
+  // Let the Mapping handle the rest.
+  cantFail(Mapping.visitMemberBegin(CVMR));
+  cantFail(Mapping.visitKnownMember(CVMR, Record));
+  cantFail(Mapping.visitMemberEnd(CVMR));
+
+  // Make sure it's padded to 4 bytes.
+  addPadding(SegmentWriter);
+  assert(getCurrentSegmentLength() % 4 == 0);
+
+  // The maximum length of a single segment is 64KB minus the size to insert a
+  // continuation.  So if we are over that, inject a continuation between the
+  // previous member and the member that was just written, then end the previous
+  // segment after the continuation and begin a new one with the just-written
+  // member.
+  if (getCurrentSegmentLength() > MaxSegmentLength) {
+    // We need to inject some bytes before the member we just wrote but after
+    // the previous member.  Save off the length of the member we just wrote so
+    // that we can do some sanity checking on it.
+    uint32_t MemberLength = SegmentWriter.getOffset() - OriginalOffset;
+    (void) MemberLength;
+    insertSegmentEnd(OriginalOffset);
+    // Since this member now becomes a new top-level record, it should have
+    // gotten a RecordPrefix injected, and that RecordPrefix + the member we
+    // just wrote should now constitute the entirety of the current "new"
+    // segment.
+    assert(getCurrentSegmentLength() == MemberLength + sizeof(RecordPrefix));
+  }
+
+  assert(getCurrentSegmentLength() % 4 == 0);
+  assert(getCurrentSegmentLength() <= MaxSegmentLength);
+}
+
+uint32_t ContinuationRecordBuilder::getCurrentSegmentLength() const {
+  return SegmentWriter.getOffset() - SegmentOffsets.back();
+}
+
+void ContinuationRecordBuilder::insertSegmentEnd(uint32_t Offset) {
+  uint32_t SegmentBegin = SegmentOffsets.back();
+  (void)SegmentBegin;
+  assert(Offset > SegmentBegin);
+  assert(Offset - SegmentBegin <= MaxSegmentLength);
+
+  // We need to make space for the continuation record.  For now we can't fill
+  // out the length or the TypeIndex of the back-reference, but we need the
+  // space to at least be there.
+  Buffer.insert(Offset, InjectedSegmentBytes);
+
+  uint32_t NewSegmentBegin = Offset + ContinuationLength;
+  uint32_t SegmentLength = NewSegmentBegin - SegmentOffsets.back();
+  (void) SegmentLength;
+
+  assert(SegmentLength % 4 == 0);
+  assert(SegmentLength <= MaxRecordLength);
+  SegmentOffsets.push_back(NewSegmentBegin);
+
+  // Seek to the end so that we can keep writing against the new segment.
+  SegmentWriter.setOffset(SegmentWriter.getLength());
+  assert(SegmentWriter.bytesRemaining() == 0);
+}
+
+CVType ContinuationRecordBuilder::createSegmentRecord(
+    uint32_t OffBegin, uint32_t OffEnd, Optional<TypeIndex> RefersTo) {
+  assert(OffEnd - OffBegin <= USHRT_MAX);
+
+  MutableArrayRef<uint8_t> Data = Buffer.data();
+  Data = Data.slice(OffBegin, OffEnd - OffBegin);
+
+  CVType Type;
+  Type.Type = getTypeLeafKind(*Kind);
+  Type.RecordData = Data;
+
+  // Write the length to the RecordPrefix, making sure it does not include
+  // sizeof(RecordPrefix.Length)
+  RecordPrefix *Prefix = reinterpret_cast<RecordPrefix *>(Data.data());
+  assert(Prefix->RecordKind == Type.Type);
+  Prefix->RecordLen = Data.size() - sizeof(RecordPrefix::RecordLen);
+
+  if (RefersTo.hasValue()) {
+    auto Continuation = Data.take_back(ContinuationLength);
+    ContinuationRecord *CR =
+        reinterpret_cast<ContinuationRecord *>(Continuation.data());
+    assert(CR->Kind == TypeLeafKind::LF_INDEX);
+    assert(CR->IndexRef == 0xB0C0B0C0);
+    CR->IndexRef = RefersTo->getIndex();
+  }
+
+  return Type;
+}
+
+std::vector<CVType> ContinuationRecordBuilder::end(TypeIndex Index) {
+  CVType Type;
+  Type.Type = getTypeLeafKind(*Kind);
+  cantFail(Mapping.visitTypeEnd(Type));
+
+  // We're now done, and we have a series of segments each beginning at an
+  // offset specified in the SegmentOffsets array.  We now need to iterate
+  // over each segment and post-process them in the following two ways:
+  // 1) Each top-level record has a RecordPrefix whose type is either
+  //    LF_FIELDLIST or LF_METHODLIST, but the Length field is still 0.
+  //    Those should all be set to the correct length now.
+  // 2) Each continuation record has an IndexRef field which we set to the
+  //    magic value 0xB0C0B0C0.  Now that the caller has told us the TypeIndex
+  //    they want this sequence to start from, we can go through and update
+  //    each one.
+  //
+  // Logically, the sequence of records we've built up looks like this:
+  //
+  // SegmentOffsets[0]:   <Length>                    (Initially: uninitialized)
+  // SegmentOffsets[0]+2: LF_FIELDLIST
+  // SegmentOffsets[0]+4: Member[0]
+  // SegmentOffsets[0]+?: ...
+  // SegmentOffsets[0]+?: Member[4]
+  // SegmentOffsets[1]-8: LF_INDEX
+  // SegmentOffsets[1]-6: 0
+  // SegmentOffsets[1]-4: <Type Index of Next Record> (Initially: 0xB0C0B0C0)
+  //
+  // SegmentOffsets[1]:   <Length>                    (Initially: uninitialized)
+  // SegmentOffsets[1]+2: LF_FIELDLIST
+  // SegmentOffsets[1]+4: Member[0]
+  // SegmentOffsets[1]+?: ...
+  // SegmentOffsets[1]+?: Member[s]
+  // SegmentOffsets[2]-8: LF_INDEX
+  // SegmentOffsets[2]-6: 0
+  // SegmentOffsets[2]-4: <Type Index of Next Record> (Initially: 0xB0C0B0C0)
+  //
+  // ...
+  //
+  // SegmentOffsets[N]:   <Length>                    (Initially: uninitialized)
+  // SegmentOffsets[N]+2: LF_FIELDLIST
+  // SegmentOffsets[N]+4: Member[0]
+  // SegmentOffsets[N]+?: ...
+  // SegmentOffsets[N]+?: Member[t]
+  //
+  // And this is the way we have laid them out in the serialization buffer.  But
+  // we cannot actually commit them to the underlying stream this way, due to
+  // the topological sorting requirement of a type stream (specifically,
+  // TypeIndex references can only point backwards, not forwards).  So the
+  // sequence that we return to the caller contains the records in reverse
+  // order, which is the proper order for committing the serialized records.
+
+  std::vector<CVType> Types;
+  Types.reserve(SegmentOffsets.size());
+
+  auto SO = makeArrayRef(SegmentOffsets);
+
+  uint32_t End = SegmentWriter.getOffset();
+
+  Optional<TypeIndex> RefersTo;
+  for (uint32_t Offset : reverse(SO)) {
+    Types.push_back(createSegmentRecord(Offset, End, RefersTo));
+
+    End = Offset;
+    RefersTo = Index++;
+  }
+
+  Kind.reset();
+  return Types;
+}
+
+// Explicitly instantiate the member function for each known type so that we can
+// implement this in the cpp file.
+#define TYPE_RECORD(EnumName, EnumVal, Name)
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
+#define MEMBER_RECORD(EnumName, EnumVal, Name)                                 \
+  template void llvm::codeview::ContinuationRecordBuilder::writeMemberType(    \
+      Name##Record &Record);
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"

external/llvm/lib/DebugInfo/CodeView/DebugChecksumsSubsection.cpp

@@ -0,0 +1,116 @@
+//===- DebugChecksumsSubsection.cpp ---------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MathExtras.h"
+#include <cassert>
+#include <cstdint>
+#include <cstring>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+struct FileChecksumEntryHeader {
+  using ulittle32_t = support::ulittle32_t;
+
+  ulittle32_t FileNameOffset; // Byte offset of filename in global string table.
+  uint8_t ChecksumSize;       // Number of bytes of checksum.
+  uint8_t ChecksumKind;       // FileChecksumKind
+                              // Checksum bytes follow.
+};
+
+Error VarStreamArrayExtractor<FileChecksumEntry>::
+operator()(BinaryStreamRef Stream, uint32_t &Len, FileChecksumEntry &Item) {
+  BinaryStreamReader Reader(Stream);
+
+  const FileChecksumEntryHeader *Header;
+  if (auto EC = Reader.readObject(Header))
+    return EC;
+
+  Item.FileNameOffset = Header->FileNameOffset;
+  Item.Kind = static_cast<FileChecksumKind>(Header->ChecksumKind);
+  if (auto EC = Reader.readBytes(Item.Checksum, Header->ChecksumSize))
+    return EC;
+
+  Len = alignTo(Header->ChecksumSize + sizeof(FileChecksumEntryHeader), 4);
+  return Error::success();
+}
+
+Error DebugChecksumsSubsectionRef::initialize(BinaryStreamReader Reader) {
+  if (auto EC = Reader.readArray(Checksums, Reader.bytesRemaining()))
+    return EC;
+
+  return Error::success();
+}
+
+Error DebugChecksumsSubsectionRef::initialize(BinaryStreamRef Section) {
+  BinaryStreamReader Reader(Section);
+  return initialize(Reader);
+}
+
+DebugChecksumsSubsection::DebugChecksumsSubsection(
+    DebugStringTableSubsection &Strings)
+    : DebugSubsection(DebugSubsectionKind::FileChecksums), Strings(Strings) {}
+
+void DebugChecksumsSubsection::addChecksum(StringRef FileName,
+                                           FileChecksumKind Kind,
+                                           ArrayRef<uint8_t> Bytes) {
+  FileChecksumEntry Entry;
+  if (!Bytes.empty()) {
+    uint8_t *Copy = Storage.Allocate<uint8_t>(Bytes.size());
+    ::memcpy(Copy, Bytes.data(), Bytes.size());
+    Entry.Checksum = makeArrayRef(Copy, Bytes.size());
+  }
+
+  Entry.FileNameOffset = Strings.insert(FileName);
+  Entry.Kind = Kind;
+  Checksums.push_back(Entry);
+
+  // This maps the offset of this string in the string table to the offset
+  // of this checksum entry in the checksum buffer.
+  OffsetMap[Entry.FileNameOffset] = SerializedSize;
+  assert(SerializedSize % 4 == 0);
+
+  uint32_t Len = alignTo(sizeof(FileChecksumEntryHeader) + Bytes.size(), 4);
+  SerializedSize += Len;
+}
+
+uint32_t DebugChecksumsSubsection::calculateSerializedSize() const {
+  return SerializedSize;
+}
+
+Error DebugChecksumsSubsection::commit(BinaryStreamWriter &Writer) const {
+  for (const auto &FC : Checksums) {
+    FileChecksumEntryHeader Header;
+    Header.ChecksumKind = uint8_t(FC.Kind);
+    Header.ChecksumSize = FC.Checksum.size();
+    Header.FileNameOffset = FC.FileNameOffset;
+    if (auto EC = Writer.writeObject(Header))
+      return EC;
+    if (auto EC = Writer.writeArray(makeArrayRef(FC.Checksum)))
+      return EC;
+    if (auto EC = Writer.padToAlignment(4))
+      return EC;
+  }
+  return Error::success();
+}
+
+uint32_t DebugChecksumsSubsection::mapChecksumOffset(StringRef FileName) const {
+  uint32_t Offset = Strings.getStringId(FileName);
+  auto Iter = OffsetMap.find(Offset);
+  assert(Iter != OffsetMap.end());
+  return Iter->second;
+}

external/llvm/lib/DebugInfo/CodeView/DebugCrossExSubsection.cpp

@@ -0,0 +1,53 @@
+//===- DebugCrossExSubsection.cpp -----------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugCrossExSubsection.h"
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Error.h"
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error DebugCrossModuleExportsSubsectionRef::initialize(
+    BinaryStreamReader Reader) {
+  if (Reader.bytesRemaining() % sizeof(CrossModuleExport) != 0)
+    return make_error<CodeViewError>(
+        cv_error_code::corrupt_record,
+        "Cross Scope Exports section is an invalid size!");
+
+  uint32_t Size = Reader.bytesRemaining() / sizeof(CrossModuleExport);
+  return Reader.readArray(References, Size);
+}
+
+Error DebugCrossModuleExportsSubsectionRef::initialize(BinaryStreamRef Stream) {
+  BinaryStreamReader Reader(Stream);
+  return initialize(Reader);
+}
+
+void DebugCrossModuleExportsSubsection::addMapping(uint32_t Local,
+                                                   uint32_t Global) {
+  Mappings[Local] = Global;
+}
+
+uint32_t DebugCrossModuleExportsSubsection::calculateSerializedSize() const {
+  return Mappings.size() * sizeof(CrossModuleExport);
+}
+
+Error DebugCrossModuleExportsSubsection::commit(
+    BinaryStreamWriter &Writer) const {
+  for (const auto &M : Mappings) {
+    if (auto EC = Writer.writeInteger(M.first))
+      return EC;
+    if (auto EC = Writer.writeInteger(M.second))
+      return EC;
+  }
+  return Error::success();
+}

external/llvm/lib/DebugInfo/CodeView/DebugCrossImpSubsection.cpp

@@ -0,0 +1,97 @@
+//===- DebugCrossImpSubsection.cpp ----------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugCrossImpSubsection.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cstdint>
+#include <utility>
+#include <vector>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error VarStreamArrayExtractor<CrossModuleImportItem>::
+operator()(BinaryStreamRef Stream, uint32_t &Len,
+           codeview::CrossModuleImportItem &Item) {
+  BinaryStreamReader Reader(Stream);
+  if (Reader.bytesRemaining() < sizeof(CrossModuleImport))
+    return make_error<CodeViewError>(
+        cv_error_code::insufficient_buffer,
+        "Not enough bytes for a Cross Module Import Header!");
+  if (auto EC = Reader.readObject(Item.Header))
+    return EC;
+  if (Reader.bytesRemaining() < Item.Header->Count * sizeof(uint32_t))
+    return make_error<CodeViewError>(
+        cv_error_code::insufficient_buffer,
+        "Not enough to read specified number of Cross Module References!");
+  if (auto EC = Reader.readArray(Item.Imports, Item.Header->Count))
+    return EC;
+  return Error::success();
+}
+
+Error DebugCrossModuleImportsSubsectionRef::initialize(
+    BinaryStreamReader Reader) {
+  return Reader.readArray(References, Reader.bytesRemaining());
+}
+
+Error DebugCrossModuleImportsSubsectionRef::initialize(BinaryStreamRef Stream) {
+  BinaryStreamReader Reader(Stream);
+  return initialize(Reader);
+}
+
+void DebugCrossModuleImportsSubsection::addImport(StringRef Module,
+                                                  uint32_t ImportId) {
+  Strings.insert(Module);
+  std::vector<support::ulittle32_t> Targets = {support::ulittle32_t(ImportId)};
+  auto Result = Mappings.insert(std::make_pair(Module, Targets));
+  if (!Result.second)
+    Result.first->getValue().push_back(Targets[0]);
+}
+
+uint32_t DebugCrossModuleImportsSubsection::calculateSerializedSize() const {
+  uint32_t Size = 0;
+  for (const auto &Item : Mappings) {
+    Size += sizeof(CrossModuleImport);
+    Size += sizeof(support::ulittle32_t) * Item.second.size();
+  }
+  return Size;
+}
+
+Error DebugCrossModuleImportsSubsection::commit(
+    BinaryStreamWriter &Writer) const {
+  using T = decltype(&*Mappings.begin());
+  std::vector<T> Ids;
+  Ids.reserve(Mappings.size());
+
+  for (const auto &M : Mappings)
+    Ids.push_back(&M);
+
+  std::sort(Ids.begin(), Ids.end(), [this](const T &L1, const T &L2) {
+    return Strings.getStringId(L1->getKey()) <
+           Strings.getStringId(L2->getKey());
+  });
+
+  for (const auto &Item : Ids) {
+    CrossModuleImport Imp;
+    Imp.ModuleNameOffset = Strings.getStringId(Item->getKey());
+    Imp.Count = Item->getValue().size();
+    if (auto EC = Writer.writeObject(Imp))
+      return EC;
+    if (auto EC = Writer.writeArray(makeArrayRef(Item->getValue())))
+      return EC;
+  }
+  return Error::success();
+}

external/llvm/lib/DebugInfo/CodeView/DebugFrameDataSubsection.cpp

@@ -0,0 +1,44 @@
+//===- DebugFrameDataSubsection.cpp -----------------------------*- 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/CodeView/DebugFrameDataSubsection.h"
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error DebugFrameDataSubsectionRef::initialize(BinaryStreamReader Reader) {
+  if (auto EC = Reader.readObject(RelocPtr))
+    return EC;
+  if (Reader.bytesRemaining() % sizeof(FrameData) != 0)
+    return make_error<CodeViewError>(cv_error_code::corrupt_record,
+                                     "Invalid frame data record format!");
+
+  uint32_t Count = Reader.bytesRemaining() / sizeof(FrameData);
+  if (auto EC = Reader.readArray(Frames, Count))
+    return EC;
+  return Error::success();
+}
+
+uint32_t DebugFrameDataSubsection::calculateSerializedSize() const {
+  return 4 + sizeof(FrameData) * Frames.size();
+}
+
+Error DebugFrameDataSubsection::commit(BinaryStreamWriter &Writer) const {
+  if (auto EC = Writer.writeInteger<uint32_t>(0))
+    return EC;
+
+  if (auto EC = Writer.writeArray(makeArrayRef(Frames)))
+    return EC;
+  return Error::success();
+}
+
+void DebugFrameDataSubsection::addFrameData(const FrameData &Frame) {
+  Frames.push_back(Frame);
+}

external/llvm/lib/DebugInfo/CodeView/DebugInlineeLinesSubsection.cpp

@@ -0,0 +1,126 @@
+//===- DebugInlineeLinesSubsection.cpp ------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugInlineeLinesSubsection.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <cassert>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error VarStreamArrayExtractor<InlineeSourceLine>::
+operator()(BinaryStreamRef Stream, uint32_t &Len, InlineeSourceLine &Item) {
+  BinaryStreamReader Reader(Stream);
+
+  if (auto EC = Reader.readObject(Item.Header))
+    return EC;
+
+  if (HasExtraFiles) {
+    uint32_t ExtraFileCount;
+    if (auto EC = Reader.readInteger(ExtraFileCount))
+      return EC;
+    if (auto EC = Reader.readArray(Item.ExtraFiles, ExtraFileCount))
+      return EC;
+  }
+
+  Len = Reader.getOffset();
+  return Error::success();
+}
+
+DebugInlineeLinesSubsectionRef::DebugInlineeLinesSubsectionRef()
+    : DebugSubsectionRef(DebugSubsectionKind::InlineeLines) {}
+
+Error DebugInlineeLinesSubsectionRef::initialize(BinaryStreamReader Reader) {
+  if (auto EC = Reader.readEnum(Signature))
+    return EC;
+
+  Lines.getExtractor().HasExtraFiles = hasExtraFiles();
+  if (auto EC = Reader.readArray(Lines, Reader.bytesRemaining()))
+    return EC;
+
+  assert(Reader.bytesRemaining() == 0);
+  return Error::success();
+}
+
+bool DebugInlineeLinesSubsectionRef::hasExtraFiles() const {
+  return Signature == InlineeLinesSignature::ExtraFiles;
+}
+
+DebugInlineeLinesSubsection::DebugInlineeLinesSubsection(
+    DebugChecksumsSubsection &Checksums, bool HasExtraFiles)
+    : DebugSubsection(DebugSubsectionKind::InlineeLines), Checksums(Checksums),
+      HasExtraFiles(HasExtraFiles) {}
+
+uint32_t DebugInlineeLinesSubsection::calculateSerializedSize() const {
+  // 4 bytes for the signature
+  uint32_t Size = sizeof(InlineeLinesSignature);
+
+  // one header for each entry.
+  Size += Entries.size() * sizeof(InlineeSourceLineHeader);
+  if (HasExtraFiles) {
+    // If extra files are enabled, one count for each entry.
+    Size += Entries.size() * sizeof(uint32_t);
+
+    // And one file id for each file.
+    Size += ExtraFileCount * sizeof(uint32_t);
+  }
+  assert(Size % 4 == 0);
+  return Size;
+}
+
+Error DebugInlineeLinesSubsection::commit(BinaryStreamWriter &Writer) const {
+  InlineeLinesSignature Sig = InlineeLinesSignature::Normal;
+  if (HasExtraFiles)
+    Sig = InlineeLinesSignature::ExtraFiles;
+
+  if (auto EC = Writer.writeEnum(Sig))
+    return EC;
+
+  for (const auto &E : Entries) {
+    if (auto EC = Writer.writeObject(E.Header))
+      return EC;
+
+    if (!HasExtraFiles)
+      continue;
+
+    if (auto EC = Writer.writeInteger<uint32_t>(E.ExtraFiles.size()))
+      return EC;
+    if (auto EC = Writer.writeArray(makeArrayRef(E.ExtraFiles)))
+      return EC;
+  }
+
+  return Error::success();
+}
+
+void DebugInlineeLinesSubsection::addExtraFile(StringRef FileName) {
+  uint32_t Offset = Checksums.mapChecksumOffset(FileName);
+
+  auto &Entry = Entries.back();
+  Entry.ExtraFiles.push_back(ulittle32_t(Offset));
+  ++ExtraFileCount;
+}
+
+void DebugInlineeLinesSubsection::addInlineSite(TypeIndex FuncId,
+                                                StringRef FileName,
+                                                uint32_t SourceLine) {
+  uint32_t Offset = Checksums.mapChecksumOffset(FileName);
+
+  Entries.emplace_back();
+  auto &Entry = Entries.back();
+  Entry.Header.FileID = Offset;
+  Entry.Header.SourceLineNum = SourceLine;
+  Entry.Header.Inlinee = FuncId;
+}

external/llvm/lib/DebugInfo/CodeView/DebugLinesSubsection.cpp

@@ -0,0 +1,161 @@
+//===- DebugLinesSubsection.cpp -------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Error.h"
+#include <cassert>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error LineColumnExtractor::operator()(BinaryStreamRef Stream, uint32_t &Len,
+                                      LineColumnEntry &Item) {
+  const LineBlockFragmentHeader *BlockHeader;
+  BinaryStreamReader Reader(Stream);
+  if (auto EC = Reader.readObject(BlockHeader))
+    return EC;
+  bool HasColumn = Header->Flags & uint16_t(LF_HaveColumns);
+  uint32_t LineInfoSize =
+      BlockHeader->NumLines *
+      (sizeof(LineNumberEntry) + (HasColumn ? sizeof(ColumnNumberEntry) : 0));
+  if (BlockHeader->BlockSize < sizeof(LineBlockFragmentHeader))
+    return make_error<CodeViewError>(cv_error_code::corrupt_record,
+                                     "Invalid line block record size");
+  uint32_t Size = BlockHeader->BlockSize - sizeof(LineBlockFragmentHeader);
+  if (LineInfoSize > Size)
+    return make_error<CodeViewError>(cv_error_code::corrupt_record,
+                                     "Invalid line block record size");
+  // The value recorded in BlockHeader->BlockSize includes the size of
+  // LineBlockFragmentHeader.
+  Len = BlockHeader->BlockSize;
+  Item.NameIndex = BlockHeader->NameIndex;
+  if (auto EC = Reader.readArray(Item.LineNumbers, BlockHeader->NumLines))
+    return EC;
+  if (HasColumn) {
+    if (auto EC = Reader.readArray(Item.Columns, BlockHeader->NumLines))
+      return EC;
+  }
+  return Error::success();
+}
+
+DebugLinesSubsectionRef::DebugLinesSubsectionRef()
+    : DebugSubsectionRef(DebugSubsectionKind::Lines) {}
+
+Error DebugLinesSubsectionRef::initialize(BinaryStreamReader Reader) {
+  if (auto EC = Reader.readObject(Header))
+    return EC;
+
+  LinesAndColumns.getExtractor().Header = Header;
+  if (auto EC = Reader.readArray(LinesAndColumns, Reader.bytesRemaining()))
+    return EC;
+
+  return Error::success();
+}
+
+bool DebugLinesSubsectionRef::hasColumnInfo() const {
+  return !!(Header->Flags & LF_HaveColumns);
+}
+
+DebugLinesSubsection::DebugLinesSubsection(DebugChecksumsSubsection &Checksums,
+                                           DebugStringTableSubsection &Strings)
+    : DebugSubsection(DebugSubsectionKind::Lines), Checksums(Checksums) {}
+
+void DebugLinesSubsection::createBlock(StringRef FileName) {
+  uint32_t Offset = Checksums.mapChecksumOffset(FileName);
+
+  Blocks.emplace_back(Offset);
+}
+
+void DebugLinesSubsection::addLineInfo(uint32_t Offset, const LineInfo &Line) {
+  Block &B = Blocks.back();
+  LineNumberEntry LNE;
+  LNE.Flags = Line.getRawData();
+  LNE.Offset = Offset;
+  B.Lines.push_back(LNE);
+}
+
+void DebugLinesSubsection::addLineAndColumnInfo(uint32_t Offset,
+                                                const LineInfo &Line,
+                                                uint32_t ColStart,
+                                                uint32_t ColEnd) {
+  Block &B = Blocks.back();
+  assert(B.Lines.size() == B.Columns.size());
+
+  addLineInfo(Offset, Line);
+  ColumnNumberEntry CNE;
+  CNE.StartColumn = ColStart;
+  CNE.EndColumn = ColEnd;
+  B.Columns.push_back(CNE);
+}
+
+Error DebugLinesSubsection::commit(BinaryStreamWriter &Writer) const {
+  LineFragmentHeader Header;
+  Header.CodeSize = CodeSize;
+  Header.Flags = hasColumnInfo() ? LF_HaveColumns : 0;
+  Header.RelocOffset = RelocOffset;
+  Header.RelocSegment = RelocSegment;
+
+  if (auto EC = Writer.writeObject(Header))
+    return EC;
+
+  for (const auto &B : Blocks) {
+    LineBlockFragmentHeader BlockHeader;
+    assert(B.Lines.size() == B.Columns.size() || B.Columns.empty());
+
+    BlockHeader.NumLines = B.Lines.size();
+    BlockHeader.BlockSize = sizeof(LineBlockFragmentHeader);
+    BlockHeader.BlockSize += BlockHeader.NumLines * sizeof(LineNumberEntry);
+    if (hasColumnInfo())
+      BlockHeader.BlockSize += BlockHeader.NumLines * sizeof(ColumnNumberEntry);
+    BlockHeader.NameIndex = B.ChecksumBufferOffset;
+    if (auto EC = Writer.writeObject(BlockHeader))
+      return EC;
+
+    if (auto EC = Writer.writeArray(makeArrayRef(B.Lines)))
+      return EC;
+
+    if (hasColumnInfo()) {
+      if (auto EC = Writer.writeArray(makeArrayRef(B.Columns)))
+        return EC;
+    }
+  }
+  return Error::success();
+}
+
+uint32_t DebugLinesSubsection::calculateSerializedSize() const {
+  uint32_t Size = sizeof(LineFragmentHeader);
+  for (const auto &B : Blocks) {
+    Size += sizeof(LineBlockFragmentHeader);
+    Size += B.Lines.size() * sizeof(LineNumberEntry);
+    if (hasColumnInfo())
+      Size += B.Columns.size() * sizeof(ColumnNumberEntry);
+  }
+  return Size;
+}
+
+void DebugLinesSubsection::setRelocationAddress(uint16_t Segment,
+                                                uint32_t Offset) {
+  RelocOffset = Offset;
+  RelocSegment = Segment;
+}
+
+void DebugLinesSubsection::setCodeSize(uint32_t Size) { CodeSize = Size; }
+
+void DebugLinesSubsection::setFlags(LineFlags Flags) { this->Flags = Flags; }
+
+bool DebugLinesSubsection::hasColumnInfo() const {
+  return Flags & LF_HaveColumns;
+}

external/llvm/lib/DebugInfo/CodeView/DebugStringTableSubsection.cpp

@@ -0,0 +1,90 @@
+//===- DebugStringTableSubsection.cpp - CodeView String Table -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+DebugStringTableSubsectionRef::DebugStringTableSubsectionRef()
+    : DebugSubsectionRef(DebugSubsectionKind::StringTable) {}
+
+Error DebugStringTableSubsectionRef::initialize(BinaryStreamRef Contents) {
+  Stream = Contents;
+  return Error::success();
+}
+
+Error DebugStringTableSubsectionRef::initialize(BinaryStreamReader &Reader) {
+  return Reader.readStreamRef(Stream);
+}
+
+Expected<StringRef>
+DebugStringTableSubsectionRef::getString(uint32_t Offset) const {
+  BinaryStreamReader Reader(Stream);
+  Reader.setOffset(Offset);
+  StringRef Result;
+  if (auto EC = Reader.readCString(Result))
+    return std::move(EC);
+  return Result;
+}
+
+DebugStringTableSubsection::DebugStringTableSubsection()
+    : DebugSubsection(DebugSubsectionKind::StringTable) {}
+
+uint32_t DebugStringTableSubsection::insert(StringRef S) {
+  auto P = Strings.insert({S, StringSize});
+
+  // If a given string didn't exist in the string table, we want to increment
+  // the string table size.
+  if (P.second)
+    StringSize += S.size() + 1; // +1 for '\0'
+  return P.first->second;
+}
+
+uint32_t DebugStringTableSubsection::calculateSerializedSize() const {
+  return StringSize;
+}
+
+Error DebugStringTableSubsection::commit(BinaryStreamWriter &Writer) const {
+  uint32_t Begin = Writer.getOffset();
+  uint32_t End = Begin + StringSize;
+
+  // Write a null string at the beginning.
+  if (auto EC = Writer.writeCString(StringRef()))
+    return EC;
+
+  for (auto &Pair : Strings) {
+    StringRef S = Pair.getKey();
+    uint32_t Offset = Begin + Pair.getValue();
+    Writer.setOffset(Offset);
+    if (auto EC = Writer.writeCString(S))
+      return EC;
+    assert(Writer.getOffset() <= End);
+  }
+
+  Writer.setOffset(End);
+  assert((End - Begin) == StringSize);
+  return Error::success();
+}
+
+uint32_t DebugStringTableSubsection::size() const { return Strings.size(); }
+
+uint32_t DebugStringTableSubsection::getStringId(StringRef S) const {
+  auto Iter = Strings.find(S);
+  assert(Iter != Strings.end());
+  return Iter->second;
+}

external/llvm/lib/DebugInfo/CodeView/DebugSubsection.cpp

@@ -0,0 +1,16 @@
+//===- DebugSubsection.cpp -----------------------------------*- 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/CodeView/DebugSubsection.h"
+
+using namespace llvm::codeview;
+
+DebugSubsectionRef::~DebugSubsectionRef() {}
+
+DebugSubsection::~DebugSubsection() {}

external/llvm/lib/DebugInfo/CodeView/DebugSubsectionRecord.cpp

@@ -0,0 +1,97 @@
+//===- DebugSubsectionRecord.cpp ------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MathExtras.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+DebugSubsectionRecord::DebugSubsectionRecord() = default;
+
+DebugSubsectionRecord::DebugSubsectionRecord(DebugSubsectionKind Kind,
+                                             BinaryStreamRef Data,
+                                             CodeViewContainer Container)
+    : Container(Container), Kind(Kind), Data(Data) {}
+
+Error DebugSubsectionRecord::initialize(BinaryStreamRef Stream,
+                                        DebugSubsectionRecord &Info,
+                                        CodeViewContainer Container) {
+  const DebugSubsectionHeader *Header;
+  BinaryStreamReader Reader(Stream);
+  if (auto EC = Reader.readObject(Header))
+    return EC;
+
+  DebugSubsectionKind Kind =
+      static_cast<DebugSubsectionKind>(uint32_t(Header->Kind));
+  if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
+    return EC;
+  Info.Container = Container;
+  Info.Kind = Kind;
+  return Error::success();
+}
+
+uint32_t DebugSubsectionRecord::getRecordLength() const {
+  return sizeof(DebugSubsectionHeader) + Data.getLength();
+}
+
+DebugSubsectionKind DebugSubsectionRecord::kind() const { return Kind; }
+
+BinaryStreamRef DebugSubsectionRecord::getRecordData() const { return Data; }
+
+DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
+    std::shared_ptr<DebugSubsection> Subsection, CodeViewContainer Container)
+    : Subsection(std::move(Subsection)), Container(Container) {}
+
+DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
+    const DebugSubsectionRecord &Contents, CodeViewContainer Container)
+    : Contents(Contents), Container(Container) {}
+
+uint32_t DebugSubsectionRecordBuilder::calculateSerializedLength() {
+  uint32_t DataSize = Subsection ? Subsection->calculateSerializedSize()
+                                 : Contents.getRecordData().getLength();
+  // The length of the entire subsection is always padded to 4 bytes,
+  // regardless of the container kind.
+  return sizeof(DebugSubsectionHeader) + alignTo(DataSize, 4);
+}
+
+Error DebugSubsectionRecordBuilder::commit(BinaryStreamWriter &Writer) const {
+  assert(Writer.getOffset() % alignOf(Container) == 0 &&
+         "Debug Subsection not properly aligned");
+
+  DebugSubsectionHeader Header;
+  Header.Kind = uint32_t(Subsection ? Subsection->kind() : Contents.kind());
+  // The value written into the Header's Length field is only padded to the
+  // container's alignment
+  uint32_t DataSize = Subsection ? Subsection->calculateSerializedSize()
+                                 : Contents.getRecordData().getLength();
+  Header.Length = alignTo(DataSize, alignOf(Container));
+
+  if (auto EC = Writer.writeObject(Header))
+    return EC;
+  if (Subsection) {
+    if (auto EC = Subsection->commit(Writer))
+      return EC;
+  } else {
+    if (auto EC = Writer.writeStreamRef(Contents.getRecordData()))
+      return EC;
+  }
+  if (auto EC = Writer.padToAlignment(4))
+    return EC;
+
+  return Error::success();
+}

external/llvm/lib/DebugInfo/CodeView/DebugSubsectionVisitor.cpp

@@ -0,0 +1,95 @@
+//===- DebugSubsectionVisitor.cpp -------------------------------*- 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/CodeView/DebugSubsectionVisitor.h"
+
+#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugCrossExSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugCrossImpSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugInlineeLinesSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
+#include "llvm/DebugInfo/CodeView/DebugSymbolRVASubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugSymbolsSubsection.h"
+#include "llvm/DebugInfo/CodeView/DebugUnknownSubsection.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamRef.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error llvm::codeview::visitDebugSubsection(
+    const DebugSubsectionRecord &R, DebugSubsectionVisitor &V,
+    const StringsAndChecksumsRef &State) {
+  BinaryStreamReader Reader(R.getRecordData());
+  switch (R.kind()) {
+  case DebugSubsectionKind::Lines: {
+    DebugLinesSubsectionRef Fragment;
+    if (auto EC = Fragment.initialize(Reader))
+      return EC;
+
+    return V.visitLines(Fragment, State);
+  }
+  case DebugSubsectionKind::FileChecksums: {
+    DebugChecksumsSubsectionRef Fragment;
+    if (auto EC = Fragment.initialize(Reader))
+      return EC;
+
+    return V.visitFileChecksums(Fragment, State);
+  }
+  case DebugSubsectionKind::InlineeLines: {
+    DebugInlineeLinesSubsectionRef Fragment;
+    if (auto EC = Fragment.initialize(Reader))
+      return EC;
+    return V.visitInlineeLines(Fragment, State);
+  }
+  case DebugSubsectionKind::CrossScopeExports: {
+    DebugCrossModuleExportsSubsectionRef Section;
+    if (auto EC = Section.initialize(Reader))
+      return EC;
+    return V.visitCrossModuleExports(Section, State);
+  }
+  case DebugSubsectionKind::CrossScopeImports: {
+    DebugCrossModuleImportsSubsectionRef Section;
+    if (auto EC = Section.initialize(Reader))
+      return EC;
+    return V.visitCrossModuleImports(Section, State);
+  }
+  case DebugSubsectionKind::Symbols: {
+    DebugSymbolsSubsectionRef Section;
+    if (auto EC = Section.initialize(Reader))
+      return EC;
+    return V.visitSymbols(Section, State);
+  }
+  case DebugSubsectionKind::StringTable: {
+    DebugStringTableSubsectionRef Section;
+    if (auto EC = Section.initialize(Reader))
+      return EC;
+    return V.visitStringTable(Section, State);
+  }
+  case DebugSubsectionKind::FrameData: {
+    DebugFrameDataSubsectionRef Section;
+    if (auto EC = Section.initialize(Reader))
+      return EC;
+    return V.visitFrameData(Section, State);
+  }
+  case DebugSubsectionKind::CoffSymbolRVA: {
+    DebugSymbolRVASubsectionRef Section;
+    if (auto EC = Section.initialize(Reader))
+      return EC;
+    return V.visitCOFFSymbolRVAs(Section, State);
+  }
+  default: {
+    DebugUnknownSubsectionRef Fragment(R.kind(), R.getRecordData());
+    return V.visitUnknown(Fragment);
+  }
+  }
+}

external/llvm/lib/DebugInfo/CodeView/DebugSymbolRVASubsection.cpp

@@ -0,0 +1,36 @@
+//===- DebugSymbolRVASubsection.cpp ---------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/DebugSymbolRVASubsection.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+DebugSymbolRVASubsectionRef::DebugSymbolRVASubsectionRef()
+    : DebugSubsectionRef(DebugSubsectionKind::CoffSymbolRVA) {}
+
+Error DebugSymbolRVASubsectionRef::initialize(BinaryStreamReader &Reader) {
+  return Reader.readArray(RVAs, Reader.bytesRemaining() / sizeof(uint32_t));
+}
+
+DebugSymbolRVASubsection::DebugSymbolRVASubsection()
+    : DebugSubsection(DebugSubsectionKind::CoffSymbolRVA) {}
+
+Error DebugSymbolRVASubsection::commit(BinaryStreamWriter &Writer) const {
+  return Writer.writeArray(makeArrayRef(RVAs));
+}
+
+uint32_t DebugSymbolRVASubsection::calculateSerializedSize() const {
+  return RVAs.size() * sizeof(uint32_t);
+}

external/llvm/lib/DebugInfo/CodeView/DebugSymbolsSubsection.cpp

@@ -0,0 +1,34 @@
+//===- DebugSymbolsSubsection.cpp -------------------------------*- 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/CodeView/DebugSymbolsSubsection.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error DebugSymbolsSubsectionRef::initialize(BinaryStreamReader Reader) {
+  return Reader.readArray(Records, Reader.getLength());
+}
+
+uint32_t DebugSymbolsSubsection::calculateSerializedSize() const {
+  return Length;
+}
+
+Error DebugSymbolsSubsection::commit(BinaryStreamWriter &Writer) const {
+  for (const auto &Record : Records) {
+    if (auto EC = Writer.writeBytes(Record.RecordData))
+      return EC;
+  }
+  return Error::success();
+}
+
+void DebugSymbolsSubsection::addSymbol(CVSymbol Symbol) {
+  Records.push_back(Symbol);
+  Length += Symbol.length();
+}

external/llvm/lib/DebugInfo/CodeView/EnumTables.cpp

@@ -0,0 +1,367 @@
+//===- EnumTables.cpp - Enum to string conversion tables ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/CodeView/EnumTables.h"
+#include "llvm/Support/ScopedPrinter.h"
+#include <type_traits>
+
+using namespace llvm;
+using namespace codeview;
+
+#define CV_ENUM_CLASS_ENT(enum_class, enum)                                    \
+  { #enum, std::underlying_type < enum_class > ::type(enum_class::enum) }
+
+#define CV_ENUM_ENT(ns, enum)                                                  \
+  { #enum, ns::enum }
+
+static const EnumEntry<SymbolKind> SymbolTypeNames[] = {
+#define CV_SYMBOL(enum, val) {#enum, enum},
+#include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
+#undef CV_SYMBOL
+};
+
+static const EnumEntry<TypeLeafKind> TypeLeafNames[] = {
+#define CV_TYPE(name, val) {#name, name},
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+#undef CV_TYPE
+};
+
+static const EnumEntry<uint16_t> RegisterNames[] = {
+#define CV_REGISTER(name, val) CV_ENUM_CLASS_ENT(RegisterId, name),
+#include "llvm/DebugInfo/CodeView/CodeViewRegisters.def"
+#undef CV_REGISTER
+};
+
+static const EnumEntry<uint32_t> PublicSymFlagNames[] = {
+    CV_ENUM_CLASS_ENT(PublicSymFlags, Code),
+    CV_ENUM_CLASS_ENT(PublicSymFlags, Function),
+    CV_ENUM_CLASS_ENT(PublicSymFlags, Managed),
+    CV_ENUM_CLASS_ENT(PublicSymFlags, MSIL),
+};
+
+static const EnumEntry<uint8_t> ProcSymFlagNames[] = {
+    CV_ENUM_CLASS_ENT(ProcSymFlags, HasFP),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, HasIRET),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, HasFRET),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, IsNoReturn),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, IsUnreachable),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, HasCustomCallingConv),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, IsNoInline),
+    CV_ENUM_CLASS_ENT(ProcSymFlags, HasOptimizedDebugInfo),
+};
+
+static const EnumEntry<uint16_t> LocalFlags[] = {
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsParameter),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsAddressTaken),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsCompilerGenerated),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsAggregate),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsAggregated),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsAliased),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsAlias),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsReturnValue),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsOptimizedOut),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsEnregisteredGlobal),
+    CV_ENUM_CLASS_ENT(LocalSymFlags, IsEnregisteredStatic),
+};
+
+static const EnumEntry<uint8_t> FrameCookieKinds[] = {
+    CV_ENUM_CLASS_ENT(FrameCookieKind, Copy),
+    CV_ENUM_CLASS_ENT(FrameCookieKind, XorStackPointer),
+    CV_ENUM_CLASS_ENT(FrameCookieKind, XorFramePointer),
+    CV_ENUM_CLASS_ENT(FrameCookieKind, XorR13),
+};
+
+static const EnumEntry<codeview::SourceLanguage> SourceLanguages[] = {
+    CV_ENUM_ENT(SourceLanguage, C),       CV_ENUM_ENT(SourceLanguage, Cpp),
+    CV_ENUM_ENT(SourceLanguage, Fortran), CV_ENUM_ENT(SourceLanguage, Masm),
+    CV_ENUM_ENT(SourceLanguage, Pascal),  CV_ENUM_ENT(SourceLanguage, Basic),
+    CV_ENUM_ENT(SourceLanguage, Cobol),   CV_ENUM_ENT(SourceLanguage, Link),
+    CV_ENUM_ENT(SourceLanguage, Cvtres),  CV_ENUM_ENT(SourceLanguage, Cvtpgd),
+    CV_ENUM_ENT(SourceLanguage, CSharp),  CV_ENUM_ENT(SourceLanguage, VB),
+    CV_ENUM_ENT(SourceLanguage, ILAsm),   CV_ENUM_ENT(SourceLanguage, Java),
+    CV_ENUM_ENT(SourceLanguage, JScript), CV_ENUM_ENT(SourceLanguage, MSIL),
+    CV_ENUM_ENT(SourceLanguage, HLSL),    CV_ENUM_ENT(SourceLanguage, D),
+};
+
+static const EnumEntry<uint32_t> CompileSym2FlagNames[] = {
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, EC),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, NoDbgInfo),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, LTCG),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, NoDataAlign),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, ManagedPresent),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, SecurityChecks),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, HotPatch),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, CVTCIL),
+    CV_ENUM_CLASS_ENT(CompileSym2Flags, MSILModule),
+};
+
+static const EnumEntry<uint32_t> CompileSym3FlagNames[] = {
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, EC),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, NoDbgInfo),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, LTCG),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, NoDataAlign),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, ManagedPresent),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, SecurityChecks),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, HotPatch),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, CVTCIL),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, MSILModule),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, Sdl),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, PGO),
+    CV_ENUM_CLASS_ENT(CompileSym3Flags, Exp),
+};
+
+static const EnumEntry<uint32_t> FileChecksumNames[] = {
+    CV_ENUM_CLASS_ENT(FileChecksumKind, None),
+    CV_ENUM_CLASS_ENT(FileChecksumKind, MD5),
+    CV_ENUM_CLASS_ENT(FileChecksumKind, SHA1),
+    CV_ENUM_CLASS_ENT(FileChecksumKind, SHA256),
+};
+
+static const EnumEntry<unsigned> CPUTypeNames[] = {
+    CV_ENUM_CLASS_ENT(CPUType, Intel8080),
+    CV_ENUM_CLASS_ENT(CPUType, Intel8086),
+    CV_ENUM_CLASS_ENT(CPUType, Intel80286),
+    CV_ENUM_CLASS_ENT(CPUType, Intel80386),
+    CV_ENUM_CLASS_ENT(CPUType, Intel80486),
+    CV_ENUM_CLASS_ENT(CPUType, Pentium),
+    CV_ENUM_CLASS_ENT(CPUType, PentiumPro),
+    CV_ENUM_CLASS_ENT(CPUType, Pentium3),
+    CV_ENUM_CLASS_ENT(CPUType, MIPS),
+    CV_ENUM_CLASS_ENT(CPUType, MIPS16),
+    CV_ENUM_CLASS_ENT(CPUType, MIPS32),
+    CV_ENUM_CLASS_ENT(CPUType, MIPS64),
+    CV_ENUM_CLASS_ENT(CPUType, MIPSI),
+    CV_ENUM_CLASS_ENT(CPUType, MIPSII),
+    CV_ENUM_CLASS_ENT(CPUType, MIPSIII),
+    CV_ENUM_CLASS_ENT(CPUType, MIPSIV),
+    CV_ENUM_CLASS_ENT(CPUType, MIPSV),
+    CV_ENUM_CLASS_ENT(CPUType, M68000),
+    CV_ENUM_CLASS_ENT(CPUType, M68010),
+    CV_ENUM_CLASS_ENT(CPUType, M68020),
+    CV_ENUM_CLASS_ENT(CPUType, M68030),
+    CV_ENUM_CLASS_ENT(CPUType, M68040),
+    CV_ENUM_CLASS_ENT(CPUType, Alpha),
+    CV_ENUM_CLASS_ENT(CPUType, Alpha21164),
+    CV_ENUM_CLASS_ENT(CPUType, Alpha21164A),
+    CV_ENUM_CLASS_ENT(CPUType, Alpha21264),
+    CV_ENUM_CLASS_ENT(CPUType, Alpha21364),
+    CV_ENUM_CLASS_ENT(CPUType, PPC601),
+    CV_ENUM_CLASS_ENT(CPUType, PPC603),
+    CV_ENUM_CLASS_ENT(CPUType, PPC604),
+    CV_ENUM_CLASS_ENT(CPUType, PPC620),
+    CV_ENUM_CLASS_ENT(CPUType, PPCFP),
+    CV_ENUM_CLASS_ENT(CPUType, PPCBE),
+    CV_ENUM_CLASS_ENT(CPUType, SH3),
+    CV_ENUM_CLASS_ENT(CPUType, SH3E),
+    CV_ENUM_CLASS_ENT(CPUType, SH3DSP),
+    CV_ENUM_CLASS_ENT(CPUType, SH4),
+    CV_ENUM_CLASS_ENT(CPUType, SHMedia),
+    CV_ENUM_CLASS_ENT(CPUType, ARM3),
+    CV_ENUM_CLASS_ENT(CPUType, ARM4),
+    CV_ENUM_CLASS_ENT(CPUType, ARM4T),
+    CV_ENUM_CLASS_ENT(CPUType, ARM5),
+    CV_ENUM_CLASS_ENT(CPUType, ARM5T),
+    CV_ENUM_CLASS_ENT(CPUType, ARM6),
+    CV_ENUM_CLASS_ENT(CPUType, ARM_XMAC),
+    CV_ENUM_CLASS_ENT(CPUType, ARM_WMMX),
+    CV_ENUM_CLASS_ENT(CPUType, ARM7),
+    CV_ENUM_CLASS_ENT(CPUType, Omni),
+    CV_ENUM_CLASS_ENT(CPUType, Ia64),
+    CV_ENUM_CLASS_ENT(CPUType, Ia64_2),
+    CV_ENUM_CLASS_ENT(CPUType, CEE),
+    CV_ENUM_CLASS_ENT(CPUType, AM33),
+    CV_ENUM_CLASS_ENT(CPUType, M32R),
+    CV_ENUM_CLASS_ENT(CPUType, TriCore),
+    CV_ENUM_CLASS_ENT(CPUType, X64),
+    CV_ENUM_CLASS_ENT(CPUType, EBC),
+    CV_ENUM_CLASS_ENT(CPUType, Thumb),
+    CV_ENUM_CLASS_ENT(CPUType, ARMNT),
+    CV_ENUM_CLASS_ENT(CPUType, D3D11_Shader),
+};
+
+static const EnumEntry<uint32_t> FrameProcSymFlagNames[] = {
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, HasAlloca),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, HasSetJmp),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, HasLongJmp),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, HasInlineAssembly),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, HasExceptionHandling),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, MarkedInline),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, HasStructuredExceptionHandling),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, Naked),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, SecurityChecks),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, AsynchronousExceptionHandling),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, NoStackOrderingForSecurityChecks),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, Inlined),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, StrictSecurityChecks),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, SafeBuffers),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, ProfileGuidedOptimization),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, ValidProfileCounts),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, OptimizedForSpeed),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, GuardCfg),
+    CV_ENUM_CLASS_ENT(FrameProcedureOptions, GuardCfw),
+};
+
+static const EnumEntry<uint32_t> ModuleSubstreamKindNames[] = {
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, None),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, Symbols),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, Lines),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, StringTable),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, FileChecksums),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, FrameData),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, InlineeLines),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, CrossScopeImports),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, CrossScopeExports),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, ILLines),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, FuncMDTokenMap),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, TypeMDTokenMap),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, MergedAssemblyInput),
+    CV_ENUM_CLASS_ENT(DebugSubsectionKind, CoffSymbolRVA),
+};
+
+static const EnumEntry<uint16_t> ExportSymFlagNames[] = {
+    CV_ENUM_CLASS_ENT(ExportFlags, IsConstant),
+    CV_ENUM_CLASS_ENT(ExportFlags, IsData),
+    CV_ENUM_CLASS_ENT(ExportFlags, IsPrivate),
+    CV_ENUM_CLASS_ENT(ExportFlags, HasNoName),
+    CV_ENUM_CLASS_ENT(ExportFlags, HasExplicitOrdinal),
+    CV_ENUM_CLASS_ENT(ExportFlags, IsForwarder),
+};
+
+static const EnumEntry<uint8_t> ThunkOrdinalNames[] = {
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, Standard),
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, ThisAdjustor),
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, Vcall),
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, Pcode),
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, UnknownLoad),
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, TrampIncremental),
+    CV_ENUM_CLASS_ENT(ThunkOrdinal, BranchIsland),
+};
+
+static const EnumEntry<uint16_t> TrampolineNames[] = {
+    CV_ENUM_CLASS_ENT(TrampolineType, TrampIncremental),
+    CV_ENUM_CLASS_ENT(TrampolineType, BranchIsland),
+};
+
+static const EnumEntry<COFF::SectionCharacteristics>
+    ImageSectionCharacteristicNames[] = {
+        CV_ENUM_ENT(COFF, IMAGE_SCN_TYPE_NOLOAD),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_TYPE_NO_PAD),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_CNT_CODE),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_CNT_INITIALIZED_DATA),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_CNT_UNINITIALIZED_DATA),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_LNK_OTHER),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_LNK_INFO),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_LNK_REMOVE),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_LNK_COMDAT),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_GPREL),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_PURGEABLE),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_16BIT),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_LOCKED),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_PRELOAD),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_1BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_2BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_4BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_8BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_16BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_32BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_64BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_128BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_256BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_512BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_1024BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_2048BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_4096BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_ALIGN_8192BYTES),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_LNK_NRELOC_OVFL),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_DISCARDABLE),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_NOT_CACHED),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_NOT_PAGED),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_SHARED),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_EXECUTE),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_READ),
+        CV_ENUM_ENT(COFF, IMAGE_SCN_MEM_WRITE)};
+
+namespace llvm {
+namespace codeview {
+
+ArrayRef<EnumEntry<SymbolKind>> getSymbolTypeNames() {
+  return makeArrayRef(SymbolTypeNames);
+}
+
+ArrayRef<EnumEntry<TypeLeafKind>> getTypeLeafNames() {
+  return makeArrayRef(TypeLeafNames);
+}
+
+ArrayRef<EnumEntry<uint16_t>> getRegisterNames() {
+  return makeArrayRef(RegisterNames);
+}
+
+ArrayRef<EnumEntry<uint32_t>> getPublicSymFlagNames() {
+  return makeArrayRef(PublicSymFlagNames);
+}
+
+ArrayRef<EnumEntry<uint8_t>> getProcSymFlagNames() {
+  return makeArrayRef(ProcSymFlagNames);
+}
+
+ArrayRef<EnumEntry<uint16_t>> getLocalFlagNames() {
+  return makeArrayRef(LocalFlags);
+}
+
+ArrayRef<EnumEntry<uint8_t>> getFrameCookieKindNames() {
+  return makeArrayRef(FrameCookieKinds);
+}
+
+ArrayRef<EnumEntry<SourceLanguage>> getSourceLanguageNames() {
+  return makeArrayRef(SourceLanguages);
+}
+
+ArrayRef<EnumEntry<uint32_t>> getCompileSym2FlagNames() {
+  return makeArrayRef(CompileSym2FlagNames);
+}
+
+ArrayRef<EnumEntry<uint32_t>> getCompileSym3FlagNames() {
+  return makeArrayRef(CompileSym3FlagNames);
+}
+
+ArrayRef<EnumEntry<uint32_t>> getFileChecksumNames() {
+  return makeArrayRef(FileChecksumNames);
+}
+
+ArrayRef<EnumEntry<unsigned>> getCPUTypeNames() {
+  return makeArrayRef(CPUTypeNames);
+}
+
+ArrayRef<EnumEntry<uint32_t>> getFrameProcSymFlagNames() {
+  return makeArrayRef(FrameProcSymFlagNames);
+}
+
+ArrayRef<EnumEntry<uint16_t>> getExportSymFlagNames() {
+  return makeArrayRef(ExportSymFlagNames);
+}
+
+ArrayRef<EnumEntry<uint32_t>> getModuleSubstreamKindNames() {
+  return makeArrayRef(ModuleSubstreamKindNames);
+}
+
+ArrayRef<EnumEntry<uint8_t>> getThunkOrdinalNames() {
+  return makeArrayRef(ThunkOrdinalNames);
+}
+
+ArrayRef<EnumEntry<uint16_t>> getTrampolineNames() {
+  return makeArrayRef(TrampolineNames);
+}
+
+ArrayRef<EnumEntry<COFF::SectionCharacteristics>>
+getImageSectionCharacteristicNames() {
+  return makeArrayRef(ImageSectionCharacteristicNames);
+}
+
+} // end namespace codeview
+} // end namespace llvm