forked from OSchip/llvm-project
430 lines
13 KiB
C++
430 lines
13 KiB
C++
//===--- lib/CodeGen/DIE.h - DWARF Info Entries -----------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Data structures for DWARF info entries.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef CODEGEN_ASMPRINTER_DIE_H__
|
|
#define CODEGEN_ASMPRINTER_DIE_H__
|
|
|
|
#include "llvm/ADT/FoldingSet.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
#include "llvm/Support/Dwarf.h"
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
class AsmPrinter;
|
|
class MCSymbol;
|
|
class raw_ostream;
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
|
|
/// Dwarf abbreviation.
|
|
class DIEAbbrevData {
|
|
/// Attribute - Dwarf attribute code.
|
|
///
|
|
unsigned Attribute;
|
|
|
|
/// Form - Dwarf form code.
|
|
///
|
|
unsigned Form;
|
|
public:
|
|
DIEAbbrevData(unsigned A, unsigned F) : Attribute(A), Form(F) {}
|
|
|
|
// Accessors.
|
|
unsigned getAttribute() const { return Attribute; }
|
|
unsigned getForm() const { return Form; }
|
|
|
|
/// Profile - Used to gather unique data for the abbreviation folding set.
|
|
///
|
|
void Profile(FoldingSetNodeID &ID) const;
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
|
|
/// information object.
|
|
class DIEAbbrev : public FoldingSetNode {
|
|
/// Tag - Dwarf tag code.
|
|
///
|
|
unsigned Tag;
|
|
|
|
/// Unique number for node.
|
|
///
|
|
unsigned Number;
|
|
|
|
/// ChildrenFlag - Dwarf children flag.
|
|
///
|
|
unsigned ChildrenFlag;
|
|
|
|
/// Data - Raw data bytes for abbreviation.
|
|
///
|
|
SmallVector<DIEAbbrevData, 8> Data;
|
|
|
|
public:
|
|
DIEAbbrev(unsigned T, unsigned C) : Tag(T), ChildrenFlag(C), Data() {}
|
|
virtual ~DIEAbbrev() {}
|
|
|
|
// Accessors.
|
|
unsigned getTag() const { return Tag; }
|
|
unsigned getNumber() const { return Number; }
|
|
unsigned getChildrenFlag() const { return ChildrenFlag; }
|
|
const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
|
|
void setTag(unsigned T) { Tag = T; }
|
|
void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
|
|
void setNumber(unsigned N) { Number = N; }
|
|
|
|
/// AddAttribute - Adds another set of attribute information to the
|
|
/// abbreviation.
|
|
void AddAttribute(unsigned Attribute, unsigned Form) {
|
|
Data.push_back(DIEAbbrevData(Attribute, Form));
|
|
}
|
|
|
|
/// AddFirstAttribute - Adds a set of attribute information to the front
|
|
/// of the abbreviation.
|
|
void AddFirstAttribute(unsigned Attribute, unsigned Form) {
|
|
Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
|
|
}
|
|
|
|
/// Profile - Used to gather unique data for the abbreviation folding set.
|
|
///
|
|
void Profile(FoldingSetNodeID &ID) const;
|
|
|
|
/// Emit - Print the abbreviation using the specified asm printer.
|
|
///
|
|
void Emit(AsmPrinter *AP) const;
|
|
|
|
#ifndef NDEBUG
|
|
void print(raw_ostream &O);
|
|
void dump();
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIE - A structured debug information entry. Has an abbreviation which
|
|
/// describes it's organization.
|
|
class DIEValue;
|
|
|
|
class DIE {
|
|
protected:
|
|
/// Abbrev - Buffer for constructing abbreviation.
|
|
///
|
|
DIEAbbrev Abbrev;
|
|
|
|
/// Offset - Offset in debug info section.
|
|
///
|
|
unsigned Offset;
|
|
|
|
/// Size - Size of instance + children.
|
|
///
|
|
unsigned Size;
|
|
|
|
/// Children DIEs.
|
|
///
|
|
std::vector<DIE *> Children;
|
|
|
|
DIE *Parent;
|
|
|
|
/// Attributes values.
|
|
///
|
|
SmallVector<DIEValue*, 32> Values;
|
|
|
|
// Private data for print()
|
|
mutable unsigned IndentCount;
|
|
public:
|
|
explicit DIE(unsigned Tag)
|
|
: Abbrev(Tag, dwarf::DW_CHILDREN_no), Offset(0),
|
|
Size(0), Parent (0), IndentCount(0) {}
|
|
virtual ~DIE();
|
|
|
|
// Accessors.
|
|
DIEAbbrev &getAbbrev() { return Abbrev; }
|
|
unsigned getAbbrevNumber() const { return Abbrev.getNumber(); }
|
|
unsigned getTag() const { return Abbrev.getTag(); }
|
|
unsigned getOffset() const { return Offset; }
|
|
unsigned getSize() const { return Size; }
|
|
const std::vector<DIE *> &getChildren() const { return Children; }
|
|
const SmallVector<DIEValue*, 32> &getValues() const { return Values; }
|
|
DIE *getParent() const { return Parent; }
|
|
void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
|
|
void setOffset(unsigned O) { Offset = O; }
|
|
void setSize(unsigned S) { Size = S; }
|
|
|
|
/// addValue - Add a value and attributes to a DIE.
|
|
///
|
|
void addValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
|
|
Abbrev.AddAttribute(Attribute, Form);
|
|
Values.push_back(Value);
|
|
}
|
|
|
|
/// SiblingOffset - Return the offset of the debug information entry's
|
|
/// sibling.
|
|
unsigned getSiblingOffset() const { return Offset + Size; }
|
|
|
|
/// addSiblingOffset - Add a sibling offset field to the front of the DIE.
|
|
/// The caller is responsible for deleting the return value at or after the
|
|
/// same time it destroys this DIE.
|
|
///
|
|
DIEValue *addSiblingOffset(BumpPtrAllocator &A);
|
|
|
|
/// addChild - Add a child to the DIE.
|
|
///
|
|
void addChild(DIE *Child) {
|
|
if (Child->getParent()) {
|
|
assert (Child->getParent() == this && "Unexpected DIE Parent!");
|
|
return;
|
|
}
|
|
Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
|
|
Children.push_back(Child);
|
|
Child->Parent = this;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
void print(raw_ostream &O, unsigned IncIndent = 0);
|
|
void dump();
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEValue - A debug information entry value.
|
|
///
|
|
class DIEValue {
|
|
public:
|
|
enum {
|
|
isInteger,
|
|
isString,
|
|
isLabel,
|
|
isSectionOffset,
|
|
isDelta,
|
|
isEntry,
|
|
isBlock
|
|
};
|
|
protected:
|
|
/// Type - Type of data stored in the value.
|
|
///
|
|
unsigned Type;
|
|
public:
|
|
explicit DIEValue(unsigned T) : Type(T) {}
|
|
virtual ~DIEValue() {}
|
|
|
|
// Accessors
|
|
unsigned getType() const { return Type; }
|
|
|
|
/// EmitValue - Emit value via the Dwarf writer.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const = 0;
|
|
|
|
/// SizeOf - Return the size of a value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const = 0;
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEValue *) { return true; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O) = 0;
|
|
void dump();
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEInteger - An integer value DIE.
|
|
///
|
|
class DIEInteger : public DIEValue {
|
|
uint64_t Integer;
|
|
public:
|
|
explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
|
|
|
|
/// BestForm - Choose the best form for integer.
|
|
///
|
|
static unsigned BestForm(bool IsSigned, uint64_t Int) {
|
|
if (IsSigned) {
|
|
if ((char)Int == (signed)Int) return dwarf::DW_FORM_data1;
|
|
if ((short)Int == (signed)Int) return dwarf::DW_FORM_data2;
|
|
if ((int)Int == (signed)Int) return dwarf::DW_FORM_data4;
|
|
} else {
|
|
if ((unsigned char)Int == Int) return dwarf::DW_FORM_data1;
|
|
if ((unsigned short)Int == Int) return dwarf::DW_FORM_data2;
|
|
if ((unsigned int)Int == Int) return dwarf::DW_FORM_data4;
|
|
}
|
|
return dwarf::DW_FORM_data8;
|
|
}
|
|
|
|
/// EmitValue - Emit integer of appropriate size.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
/// SizeOf - Determine size of integer value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEInteger *) { return true; }
|
|
static bool classof(const DIEValue *I) { return I->getType() == isInteger; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O);
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEString - A string value DIE. This DIE keeps string reference only.
|
|
///
|
|
class DIEString : public DIEValue {
|
|
const StringRef Str;
|
|
public:
|
|
explicit DIEString(const StringRef S) : DIEValue(isString), Str(S) {}
|
|
|
|
/// EmitValue - Emit string value.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
/// SizeOf - Determine size of string value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned /*Form*/) const {
|
|
return Str.size() + sizeof(char); // sizeof('\0');
|
|
}
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEString *) { return true; }
|
|
static bool classof(const DIEValue *S) { return S->getType() == isString; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O);
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIELabel - A label expression DIE.
|
|
//
|
|
class DIELabel : public DIEValue {
|
|
const MCSymbol *Label;
|
|
public:
|
|
explicit DIELabel(const MCSymbol *L) : DIEValue(isLabel), Label(L) {}
|
|
|
|
/// EmitValue - Emit label value.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
/// SizeOf - Determine size of label value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIELabel *) { return true; }
|
|
static bool classof(const DIEValue *L) { return L->getType() == isLabel; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O);
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEDelta - A simple label difference DIE.
|
|
///
|
|
class DIEDelta : public DIEValue {
|
|
const MCSymbol *LabelHi;
|
|
const MCSymbol *LabelLo;
|
|
public:
|
|
DIEDelta(const MCSymbol *Hi, const MCSymbol *Lo)
|
|
: DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
|
|
|
|
/// EmitValue - Emit delta value.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
/// SizeOf - Determine size of delta value in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEDelta *) { return true; }
|
|
static bool classof(const DIEValue *D) { return D->getType() == isDelta; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O);
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEntry - A pointer to another debug information entry. An instance of
|
|
/// this class can also be used as a proxy for a debug information entry not
|
|
/// yet defined (ie. types.)
|
|
class DIEEntry : public DIEValue {
|
|
DIE *const Entry;
|
|
public:
|
|
explicit DIEEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
|
|
|
|
DIE *getEntry() const { return Entry; }
|
|
|
|
/// EmitValue - Emit debug information entry offset.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
/// SizeOf - Determine size of debug information entry in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const {
|
|
return sizeof(int32_t);
|
|
}
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEEntry *) { return true; }
|
|
static bool classof(const DIEValue *E) { return E->getType() == isEntry; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O);
|
|
#endif
|
|
};
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
/// DIEBlock - A block of values. Primarily used for location expressions.
|
|
//
|
|
class DIEBlock : public DIEValue, public DIE {
|
|
unsigned Size; // Size in bytes excluding size header.
|
|
public:
|
|
DIEBlock()
|
|
: DIEValue(isBlock), DIE(0), Size(0) {}
|
|
virtual ~DIEBlock() {}
|
|
|
|
/// ComputeSize - calculate the size of the block.
|
|
///
|
|
unsigned ComputeSize(AsmPrinter *AP);
|
|
|
|
/// BestForm - Choose the best form for data.
|
|
///
|
|
unsigned BestForm() const {
|
|
if ((unsigned char)Size == Size) return dwarf::DW_FORM_block1;
|
|
if ((unsigned short)Size == Size) return dwarf::DW_FORM_block2;
|
|
if ((unsigned int)Size == Size) return dwarf::DW_FORM_block4;
|
|
return dwarf::DW_FORM_block;
|
|
}
|
|
|
|
/// EmitValue - Emit block data.
|
|
///
|
|
virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
/// SizeOf - Determine size of block data in bytes.
|
|
///
|
|
virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
|
|
|
|
// Implement isa/cast/dyncast.
|
|
static bool classof(const DIEBlock *) { return true; }
|
|
static bool classof(const DIEValue *E) { return E->getType() == isBlock; }
|
|
|
|
#ifndef NDEBUG
|
|
virtual void print(raw_ostream &O);
|
|
#endif
|
|
};
|
|
|
|
} // end llvm namespace
|
|
|
|
#endif
|