1 files changed, 63 insertions, 0 deletions
diff --git a/llvm/lib/DebugInfo/CodeView/ModuleDebugLineFragment.cpp b/llvm/lib/DebugInfo/CodeView/ModuleDebugLineFragment.cpp
new file mode 100644
index 00000000000..1b840890560
--- /dev/null
+++ b/llvm/lib/DebugInfo/CodeView/ModuleDebugLineFragment.cpp
@@ -0,0 +1,63 @@
+//===- ModuleDebugLineFragment.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/ModuleDebugLineFragment.h"
+
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+#include "llvm/DebugInfo/CodeView/ModuleDebugFragmentRecord.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+
+Error LineColumnExtractor::extract(BinaryStreamRef Stream, uint32_t &Len,
+                                   LineColumnEntry &Item,
+                                   const LineFragmentHeader *Header) {
+  using namespace codeview;
+  const LineBlockFragmentHeader *BlockHeader;
+  BinaryStreamReader Reader(Stream);
+  if (auto EC = Reader.readObject(BlockHeader))
+    return EC;
+  bool HasColumn = Header->Flags & uint32_t(LineFlags::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();
+}
+
+ModuleDebugLineFragment::ModuleDebugLineFragment()
+    : ModuleDebugFragment(ModuleDebugFragmentKind::Lines) {}
+
+Error ModuleDebugLineFragment::initialize(BinaryStreamReader Reader) {
+  if (auto EC = Reader.readObject(Header))
+    return EC;
+
+  if (auto EC =
+          Reader.readArray(LinesAndColumns, Reader.bytesRemaining(), Header))
+    return EC;
+
+  return Error::success();
+}