1 files changed, 81 insertions, 0 deletions
diff --git a/lib/DebugInfo/CodeView/DebugSubsectionRecord.cpp b/lib/DebugInfo/CodeView/DebugSubsectionRecord.cpp
new file mode 100644
index 000000000000..511f36d0020a
--- /dev/null
+++ b/lib/DebugInfo/CodeView/DebugSubsectionRecord.cpp
@@ -0,0 +1,81 @@
+//===- DebugSubsectionRecord.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/DebugSubsectionRecord.h"
+#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
+
+#include "llvm/Support/BinaryStreamReader.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+DebugSubsectionRecord::DebugSubsectionRecord()
+    : Kind(DebugSubsectionKind::None) {}
+
+DebugSubsectionRecord::DebugSubsectionRecord(DebugSubsectionKind Kind,
+                                             BinaryStreamRef Data)
+    : Kind(Kind), Data(Data) {}
+
+Error DebugSubsectionRecord::initialize(BinaryStreamRef Stream,
+                                        DebugSubsectionRecord &Info) {
+  const DebugSubsectionHeader *Header;
+  BinaryStreamReader Reader(Stream);
+  if (auto EC = Reader.readObject(Header))
+    return EC;
+
+  DebugSubsectionKind Kind =
+      static_cast<DebugSubsectionKind>(uint32_t(Header->Kind));
+  switch (Kind) {
+  case DebugSubsectionKind::FileChecksums:
+  case DebugSubsectionKind::Lines:
+  case DebugSubsectionKind::InlineeLines:
+    break;
+  default:
+    llvm_unreachable("Unexpected debug fragment kind!");
+  }
+  if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
+    return EC;
+  Info.Kind = Kind;
+  return Error::success();
+}
+
+uint32_t DebugSubsectionRecord::getRecordLength() const {
+  uint32_t Result = sizeof(DebugSubsectionHeader) + Data.getLength();
+  assert(Result % 4 == 0);
+  return Result;
+}
+
+DebugSubsectionKind DebugSubsectionRecord::kind() const { return Kind; }
+
+BinaryStreamRef DebugSubsectionRecord::getRecordData() const { return Data; }
+
+DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
+    DebugSubsectionKind Kind, DebugSubsection &Frag)
+    : Kind(Kind), Frag(Frag) {}
+
+uint32_t DebugSubsectionRecordBuilder::calculateSerializedLength() {
+  uint32_t Size = sizeof(DebugSubsectionHeader) +
+                  alignTo(Frag.calculateSerializedSize(), 4);
+  return Size;
+}
+
+Error DebugSubsectionRecordBuilder::commit(BinaryStreamWriter &Writer) {
+  DebugSubsectionHeader Header;
+  Header.Kind = uint32_t(Kind);
+  Header.Length = calculateSerializedLength() - sizeof(DebugSubsectionHeader);
+
+  if (auto EC = Writer.writeObject(Header))
+    return EC;
+  if (auto EC = Frag.commit(Writer))
+    return EC;
+  if (auto EC = Writer.padToAlignment(4))
+    return EC;
+
+  return Error::success();
+}