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//===- UDTLayout.h - UDT layout info ----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#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
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