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Reworked how Dwarf debug info entries and abbreviations are handled. Added

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pubnames and debuy str sections.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25487 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey
2006-01-20 20:34:06 +00:00
parent bea99471c7
commit d18e28964b
2 changed files with 658 additions and 249 deletions
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325
include/llvm/CodeGen/DwarfWriter.h
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@@ -437,6 +437,15 @@ namespace llvm {
DW_CFA_hi_user = 0x3f
};
//===--------------------------------------------------------------------===//
// Forward declarations.
//
class AsmPrinter;
class DIE;
class DwarfWriter;
class DWContext;
class MachineDebugInfo;
//===--------------------------------------------------------------------===//
// DWLabel - Labels are used to track locations in the assembler file.
// Labels appear in the form <prefix>debug_<Tag><Number>, where the tag is a
@@ -445,57 +454,89 @@ namespace llvm {
struct DWLabel {
const char *Tag; // Label category tag. Should always be
// a staticly declared C string.
unsigned Number; // Unique number
unsigned Number; // Unique number.
DWLabel() : Tag(NULL), Number(0) {}
DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
};
//===--------------------------------------------------------------------===//
// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
// Dwarf abbreviation.
class DIEAbbrevData {
private:
unsigned Attribute; // Dwarf attribute code.
unsigned Form; // Dwarf form code.
public:
DIEAbbrevData(unsigned A, unsigned F)
: Attribute(A)
, Form(F)
{}
// Accessors
unsigned getAttribute() const { return Attribute; }
unsigned getForm() const { return Form; }
};
//===--------------------------------------------------------------------===//
// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
// information object.
//
class DIEAbbrev {
private:
const unsigned char *Data; // Static array of bytes containing the
// image of the raw abbreviation data.
unsigned Tag; // Dwarf tag code.
unsigned ChildrenFlag; // Dwarf children flag.
std::vector<DIEAbbrevData> Data; // Raw data bytes for abbreviation.
public:
DIEAbbrev(const unsigned char *D)
: Data(D)
DIEAbbrev(unsigned T, unsigned C)
: Tag(T)
, ChildrenFlag(C)
, Data()
{}
~DIEAbbrev() {}
// Accessors
unsigned getTag() const { return Tag; }
unsigned getChildrenFlag() const { return ChildrenFlag; }
const std::vector<DIEAbbrevData> &getData() const { return Data; }
/// operator== - Used by UniqueVector to locate entry.
///
bool operator==(const DIEAbbrev &DA) const {
return Data == DA.Data;
}
bool operator==(const DIEAbbrev &DA) const;
/// operator< - Used by UniqueVector to locate entry.
///
bool operator<(const DIEAbbrev &DA) const {
return Data < DA.Data;
}
bool operator<(const DIEAbbrev &DA) const;
// Accessors
unsigned getTag() const { return Data[0]; }
unsigned getChildrenFlag() const { return Data[1]; }
unsigned getAttribute(unsigned i) const { return Data[2 + 2 * i + 0]; }
unsigned getForm(unsigned i) const { return Data[2 + 2 * i + 1]; }
/// AddAttribute - Adds another set of attribute information to the
/// abbreviation.
void AddAttribute(unsigned Attribute, unsigned Form) {
Data.push_back(DIEAbbrevData(Attribute, Form));
}
/// Emit - Print the abbreviation using the specified Dwarf writer.
///
void Emit(const DwarfWriter &DW) const;
#ifndef NDEBUG
void print(std::ostream &O);
void dump();
#endif
};
//===--------------------------------------------------------------------===//
// DIEValue - A debug information entry value.
//
class DwarfWriter;
class DIEValue {
public:
enum {
isInteger,
isString,
isLabel,
isDelta
isAsIsLabel,
isDelta,
isEntry
};
unsigned Type; // Type of the value
@@ -520,14 +561,14 @@ namespace llvm {
//
class DIEInteger : public DIEValue {
private:
int Value;
int Integer;
public:
DIEInteger(int V) : DIEValue(isInteger), Value(V) {}
DIEInteger(int I) : DIEValue(isInteger), Integer(I) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEInteger *) { return true; }
static bool classof(const DIEValue *V) { return V->Type == isInteger; }
static bool classof(const DIEValue *I) { return I->Type == isInteger; }
/// EmitValue - Emit integer of appropriate size.
///
@@ -542,13 +583,13 @@ namespace llvm {
// DIEString - A string value DIE.
//
struct DIEString : public DIEValue {
const std::string Value;
const std::string String;
DIEString(const std::string &V) : DIEValue(isString), Value(V) {}
DIEString(const std::string &S) : DIEValue(isString), String(S) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEString *) { return true; }
static bool classof(const DIEValue *V) { return V->Type == isString; }
static bool classof(const DIEValue *S) { return S->Type == isString; }
/// EmitValue - Emit string value.
///
@@ -563,13 +604,35 @@ namespace llvm {
// DIELabel - A simple label expression DIE.
//
struct DIELabel : public DIEValue {
const DWLabel Value;
const DWLabel Label;
DIELabel(const DWLabel &V) : DIEValue(isLabel), Value(V) {}
DIELabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
// Implement isa/cast/dyncast.
static bool classof(const DWLabel *) { return true; }
static bool classof(const DIEValue *V) { return V->Type == isLabel; }
static bool classof(const DIELabel *) { return true; }
static bool classof(const DIEValue *L) { return L->Type == isLabel; }
/// EmitValue - Emit label value.
///
virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
/// SizeOf - Determine size of label value in bytes.
///
virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
};
//===--------------------------------------------------------------------===//
// DIEAsIsLabel - An exact name of a label.
//
struct DIEAsIsLabel : public DIEValue {
const std::string Label;
DIEAsIsLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEAsIsLabel *) { return true; }
static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
/// EmitValue - Emit label value.
///
@@ -584,15 +647,36 @@ namespace llvm {
// DIEDelta - A simple label difference DIE.
//
struct DIEDelta : public DIEValue {
const DWLabel Value1;
const DWLabel Value2;
const DWLabel LabelHi;
const DWLabel LabelLo;
DIEDelta(const DWLabel &V1, const DWLabel &V2)
: DIEValue(isDelta), Value1(V1), Value2(V2) {}
DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
: DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEDelta *) { return true; }
static bool classof(const DIEValue *V) { return V->Type == isDelta; }
static bool classof(const DIEValue *D) { return D->Type == isDelta; }
/// EmitValue - Emit delta value.
///
virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
/// SizeOf - Determine size of delta value in bytes.
///
virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
};
//===--------------------------------------------------------------------===//
// DIEntry - A pointer to a debug information entry.
//
struct DIEntry : public DIEValue {
DIE *Entry;
DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEntry *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isEntry; }
/// EmitValue - Emit delta value.
///
@@ -608,70 +692,106 @@ namespace llvm {
// describes it's organization.
class DIE {
private:
DIEAbbrev *Abbrev; // Temporary buffer for abbreviation.
unsigned AbbrevID; // Decribing abbreviation ID.
unsigned Offset; // Offset in debug info section
unsigned Size; // Size of instance + children
std::vector<DIE *> Children; // Children DIEs
std::vector<DIEValue *> Values; // Attributes values
unsigned Offset; // Offset in debug info section.
unsigned Size; // Size of instance + children.
DWContext *Context; // Context for types and values.
std::vector<DIE *> Children; // Children DIEs.
std::vector<DIEValue *> Values; // Attributes values.
public:
DIE(unsigned AbbrevID)
: AbbrevID(AbbrevID)
, Offset(0)
, Size(0)
, Children()
, Values()
{}
~DIE() {
for (unsigned i = 0, N = Children.size(); i < N; i++) {
delete Children[i];
}
for (unsigned j = 0, M = Children.size(); j < M; j++) {
delete Children[j];
}
}
DIE(unsigned Tag, unsigned ChildrenFlag);
~DIE();
// Accessors
unsigned getAbbrevID() const { return AbbrevID; }
unsigned getOffset() const { return Offset; }
unsigned getSize() const { return Size; }
unsigned getAbbrevID() const { return AbbrevID; }
unsigned getOffset() const { return Offset; }
unsigned getSize() const { return Size; }
DWContext *getContext() const { return Context; }
const std::vector<DIE *> &getChildren() const { return Children; }
const std::vector<DIEValue *> &getValues() const { return Values; }
void setOffset(unsigned O) { Offset = O; }
void setSize(unsigned S) { Size = S; }
/// AddValue - Add an attribute value of appropriate type.
///
void AddValue(int Value) {
Values.push_back(new DIEInteger(Value));
}
void AddValue(const std::string &Value) {
Values.push_back(new DIEString(Value));
}
void AddValue(const DWLabel &Value) {
Values.push_back(new DIELabel(Value));
}
void AddValue(const DWLabel &Value1, const DWLabel &Value2) {
Values.push_back(new DIEDelta(Value1, Value2));
}
void setContext(DWContext *C) { Context = C; }
/// SiblingOffset - Return the offset of the debug information entry's
/// sibling.
unsigned SiblingOffset() const { return Offset + Size; }
/// AddInt - Add a simple integer attribute data and value.
///
void AddInt(unsigned Attribute, unsigned Form, int Integer);
/// AddString - Add a std::string attribute data and value.
///
void AddString(unsigned Attribute, unsigned Form,
const std::string &String);
/// AddLabel - Add a Dwarf label attribute data and value.
///
void AddLabel(unsigned Attribute, unsigned Form, const DWLabel &Label);
/// AddAsIsLabel - Add a non-Dwarf label attribute data and value.
///
void AddAsIsLabel(unsigned Attribute, unsigned Form,
const std::string &Label);
/// AddDelta - Add a label delta attribute data and value.
///
void AddDelta(unsigned Attribute, unsigned Form,
const DWLabel &Hi, const DWLabel &Lo);
/// AddDIEntry - Add a DIE attribute data and value.
///
void AddDIEntry(unsigned Attribute, unsigned Form, DIE *Entry);
/// Complete - Indicate that all attributes have been added and
/// ready to get an abbreviation ID.
///
void Complete(DwarfWriter &DW);
/// AddChild - Add a child to the DIE.
void AddChild(DIE *Child);
};
//===--------------------------------------------------------------------===//
/// DWContext - Name context for types and values.
///
class DWContext {
private:
DwarfWriter &DW; // DwarfWriter for global information.
DIE *Owner; // Owning debug information entry.
std::map<std::string, DIE*> Types; // Named types in context.
std::map<std::string, DIE*> Variables;// Named variables in context.
public:
DWContext(DwarfWriter &D, DIE *O)
: DW(D)
, Owner(O)
, Types()
, Variables()
{
Owner->setContext(this);
}
~DWContext() {}
/// NewBasicType - Creates a new basic type, if necessary, then adds in the
/// context and owner.
DIE *NewBasicType(const std::string &Name, unsigned Size,
unsigned Encoding);
/// NewVariable - Creates a basic variable, if necessary, then adds in the
/// context and owner.
DIE *NewVariable(const std::string &Name,
unsigned SourceFileID, unsigned Line,
DIE *Type, bool IsExternal);
};
//===--------------------------------------------------------------------===//
// Forward declarations.
//
class AsmPrinter;
class MachineDebugInfo;
//===--------------------------------------------------------------------===//
// DwarfWriter - emits Dwarf debug and exception handling directives.
// DwarfWriter - Emits Dwarf debug and exception handling directives.
//
class DwarfWriter {
protected:
//===------------------------------------------------------------------===//
@@ -707,6 +827,18 @@ namespace llvm {
///
UniqueVector<DIEAbbrev> Abbreviations;
/// GlobalTypes - A map of globally visible named types.
///
std::map<std::string, DIE *> GlobalTypes;
/// GlobalEntities - A map of globally visible named entities.
///
std::map<std::string, DIE *> GlobalEntities;
/// StringPool - A UniqueVector of strings used by indirect references.
///
UniqueVector<std::string> StringPool;
//===------------------------------------------------------------------===//
// Properties to be set by the derived class ctor, used to configure the
// Dwarf writer.
@@ -861,21 +993,34 @@ public:
EmitReference(Label.Tag, Label.Number);
}
void EmitReference(const char *Tag, unsigned Number) const;
void EmitReference(const std::string Name) const;
/// EmitDifference - Emit the difference between two labels. Some
/// assemblers do not behave with absolute expressions with data directives,
/// so there is an option (needsSet) to use an intermediary set expression.
void EmitDifference(DWLabel Label1, DWLabel Label2) const {
EmitDifference(Label1.Tag, Label1.Number, Label2.Tag, Label2.Number);
void EmitDifference(DWLabel LabelHi, DWLabel LabelLo) const {
EmitDifference(LabelHi.Tag, LabelHi.Number, LabelLo.Tag, LabelLo.Number);
}
void EmitDifference(const char *Tag1, unsigned Number1,
const char *Tag2, unsigned Number2) const;
void EmitDifference(const char *TagHi, unsigned NumberHi,
const char *TagLo, unsigned NumberLo) const;
private:
/// NewDIE - Construct a new structured debug information entry.
/// NewAbbreviation - Add the abbreviation to the Abbreviation vector.
///
DIE *NewDIE(const unsigned char *AbbrevData);
unsigned NewAbbreviation(DIEAbbrev *Abbrev);
/// NewString - Add a string to the constant pool and returns a label.
///
DWLabel NewString(const std::string &String);
/// NewGlobalType - Make the type visible globally using the given name.
///
void NewGlobalType(const std::string &Name, DIE *Type);
/// NewGlobalEntity - Make the entity visible globally using the given name.
///
void NewGlobalEntity(const std::string &Name, DIE *Entity);
private:
/// NewCompileUnit - Create new compile unit information.
///
DIE *NewCompileUnit(const std::string &Directory,
@@ -956,7 +1101,7 @@ private:
void SetDebugInfo(MachineDebugInfo *di) { DebugInfo = di; }
//===------------------------------------------------------------------===//
// Main enties.
// Main entry points.
//
/// BeginModule - Emit all Dwarf sections that should come prior to the