1 files changed, 181 insertions, 0 deletions
diff --git a/clang-r353983/include/llvm/DebugInfo/PDB/UDTLayout.h b/clang-r353983/include/llvm/DebugInfo/PDB/UDTLayout.h
new file mode 100644
index 00000000..c67b093b
--- /dev/null
+++ b/clang-r353983/include/llvm/DebugInfo/PDB/UDTLayout.h
@@ -0,0 +1,181 @@
+//===- UDTLayout.h - UDT layout info ----------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_PDB_UDTLAYOUT_H
+#define LLVM_DEBUGINFO_PDB_UDTLAYOUT_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"
+#include "llvm/DebugInfo/PDB/PDBTypes.h"
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace llvm {
+namespace pdb {
+
+class BaseClassLayout;
+class ClassLayout;
+class UDTLayoutBase;
+
+class LayoutItemBase {
+public:
+  LayoutItemBase(const UDTLayoutBase *Parent, const PDBSymbol *Symbol,
+                 const std::string &Name, uint32_t OffsetInParent,
+                 uint32_t Size, bool IsElided);
+  virtual ~LayoutItemBase() = default;
+
+  uint32_t deepPaddingSize() const;
+  virtual uint32_t immediatePadding() const { return 0; }
+  virtual uint32_t tailPadding() const;
+
+  const UDTLayoutBase *getParent() const { return Parent; }
+  StringRef getName() const { return Name; }
+  uint32_t getOffsetInParent() const { return OffsetInParent; }
+  uint32_t getSize() const { return SizeOf; }
+  uint32_t getLayoutSize() const { return LayoutSize; }
+  const PDBSymbol *getSymbol() const { return Symbol; }
+  const BitVector &usedBytes() const { return UsedBytes; }
+  bool isElided() const { return IsElided; }
+  virtual bool isVBPtr() const { return false; }
+
+  uint32_t containsOffset(uint32_t Off) const {
+    uint32_t Begin = getOffsetInParent();
+    uint32_t End = Begin + getSize();
+    return (Off >= Begin && Off < End);
+  }
+
+protected:
+  const PDBSymbol *Symbol = nullptr;
+  const UDTLayoutBase *Parent = nullptr;
+  BitVector UsedBytes;
+  std::string Name;
+  uint32_t OffsetInParent = 0;
+  uint32_t SizeOf = 0;
+  uint32_t LayoutSize = 0;
+  bool IsElided = false;
+};
+
+class VBPtrLayoutItem : public LayoutItemBase {
+public:
+  VBPtrLayoutItem(const UDTLayoutBase &Parent,
+                  std::unique_ptr<PDBSymbolTypeBuiltin> Sym, uint32_t Offset,
+                  uint32_t Size);
+
+  bool isVBPtr() const override { return true; }
+
+private:
+  std::unique_ptr<PDBSymbolTypeBuiltin> Type;
+};
+
+class DataMemberLayoutItem : public LayoutItemBase {
+public:
+  DataMemberLayoutItem(const UDTLayoutBase &Parent,
+                       std::unique_ptr<PDBSymbolData> DataMember);
+
+  const PDBSymbolData &getDataMember();
+  bool hasUDTLayout() const;
+  const ClassLayout &getUDTLayout() const;
+
+private:
+  std::unique_ptr<PDBSymbolData> DataMember;
+  std::unique_ptr<ClassLayout> UdtLayout;
+};
+
+class VTableLayoutItem : public LayoutItemBase {
+public:
+  VTableLayoutItem(const UDTLayoutBase &Parent,
+                   std::unique_ptr<PDBSymbolTypeVTable> VTable);
+
+  uint32_t getElementSize() const { return ElementSize; }
+
+private:
+  uint32_t ElementSize = 0;
+  std::unique_ptr<PDBSymbolTypeVTable> VTable;
+};
+
+class UDTLayoutBase : public LayoutItemBase {
+  template <typename T> using UniquePtrVector = std::vector<std::unique_ptr<T>>;
+
+public:
+  UDTLayoutBase(const UDTLayoutBase *Parent, const PDBSymbol &Sym,
+                const std::string &Name, uint32_t OffsetInParent, uint32_t Size,
+                bool IsElided);
+
+  uint32_t tailPadding() const override;
+  ArrayRef<LayoutItemBase *> layout_items() const { return LayoutItems; }
+  ArrayRef<BaseClassLayout *> bases() const { return AllBases; }
+  ArrayRef<BaseClassLayout *> regular_bases() const { return NonVirtualBases; }
+  ArrayRef<BaseClassLayout *> virtual_bases() const { return VirtualBases; }
+  uint32_t directVirtualBaseCount() const { return DirectVBaseCount; }
+  ArrayRef<std::unique_ptr<PDBSymbolFunc>> funcs() const { return Funcs; }
+  ArrayRef<std::unique_ptr<PDBSymbol>> other_items() const { return Other; }
+
+protected:
+  bool hasVBPtrAtOffset(uint32_t Off) const;
+  void initializeChildren(const PDBSymbol &Sym);
+
+  void addChildToLayout(std::unique_ptr<LayoutItemBase> Child);
+
+  uint32_t DirectVBaseCount = 0;
+
+  UniquePtrVector<PDBSymbol> Other;
+  UniquePtrVector<PDBSymbolFunc> Funcs;
+  UniquePtrVector<LayoutItemBase> ChildStorage;
+  std::vector<LayoutItemBase *> LayoutItems;
+
+  std::vector<BaseClassLayout *> AllBases;
+  ArrayRef<BaseClassLayout *> NonVirtualBases;
+  ArrayRef<BaseClassLayout *> VirtualBases;
+
+  VTableLayoutItem *VTable = nullptr;
+  VBPtrLayoutItem *VBPtr = nullptr;
+};
+
+class BaseClassLayout : public UDTLayoutBase {
+public:
+  BaseClassLayout(const UDTLayoutBase &Parent, uint32_t OffsetInParent,
+                  bool Elide, std::unique_ptr<PDBSymbolTypeBaseClass> Base);
+
+  const PDBSymbolTypeBaseClass &getBase() const { return *Base; }
+  bool isVirtualBase() const { return IsVirtualBase; }
+  bool isEmptyBase() { return SizeOf == 1 && LayoutSize == 0; }
+
+private:
+  std::unique_ptr<PDBSymbolTypeBaseClass> Base;
+  bool IsVirtualBase;
+};
+
+class ClassLayout : public UDTLayoutBase {
+public:
+  explicit ClassLayout(const PDBSymbolTypeUDT &UDT);
+  explicit ClassLayout(std::unique_ptr<PDBSymbolTypeUDT> UDT);
+
+  ClassLayout(ClassLayout &&Other) = default;
+
+  const PDBSymbolTypeUDT &getClass() const { return UDT; }
+  uint32_t immediatePadding() const override;
+
+private:
+  BitVector ImmediateUsedBytes;
+  std::unique_ptr<PDBSymbolTypeUDT> OwnedStorage;
+  const PDBSymbolTypeUDT &UDT;
+};
+
+} // end namespace pdb
+} // end namespace llvm
+
+#endif // LLVM_DEBUGINFO_PDB_UDTLAYOUT_H