//
//===----------------------------------------------------------------------===//
//
-// This file contains support for writing dwarf debug info into asm files.
+// This file contains support for writing dwarf info into asm files.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/UniqueVector.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineDebugInfo.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetFrameInfo.h"
-
-#include <iostream>
-
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include <ostream>
+#include <string>
using namespace llvm;
using namespace llvm::dwarf;
-static cl::opt<bool>
-DwarfVerbose("dwarf-verbose", cl::Hidden,
- cl::desc("Add comments to Dwarf directives."));
-
namespace llvm {
+
+//===----------------------------------------------------------------------===//
+
+/// Configuration values for initial hash set sizes (log2).
+///
+static const unsigned InitDiesSetSize = 9; // 512
+static const unsigned InitAbbreviationsSetSize = 9; // 512
+static const unsigned InitValuesSetSize = 9; // 512
//===----------------------------------------------------------------------===//
-// Forward declarations.
-//
+/// Forward declarations.
+///
class DIE;
+class DIEValue;
//===----------------------------------------------------------------------===//
-// CompileUnit - This dwarf writer support class manages information associate
-// with a source file.
-class CompileUnit {
-private:
- CompileUnitDesc *Desc; // Compile unit debug descriptor.
- unsigned ID; // File ID for source.
- DIE *Die; // Compile unit debug information entry.
- std::map<std::string, DIE *> Globals; // A map of globally visible named
- // entities for this unit.
- std::map<DebugInfoDesc *, DIE *> DescToDieMap;
- // Tracks the mapping of unit level
- // debug informaton descriptors to debug
- // information entries.
-
+/// DWLabel - Labels are used to track locations in the assembler file.
+/// Labels appear in the form <prefix><Tag><Number>, where the tag is a
+/// category of label (Ex. location) and number is a value unique in that
+/// category.
+class DWLabel {
public:
- CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
- : Desc(CUD)
- , ID(I)
- , Die(D)
- , Globals()
- , DescToDieMap()
- {}
-
- ~CompileUnit();
-
- // Accessors.
- CompileUnitDesc *getDesc() const { return Desc; }
- unsigned getID() const { return ID; }
- DIE* getDie() const { return Die; }
- std::map<std::string, DIE *> &getGlobals() { return Globals; }
-
- /// hasContent - Return true if this compile unit has something to write out.
+ /// Tag - Label category tag. Should always be a staticly declared C string.
///
- bool hasContent() const;
+ const char *Tag;
- /// AddGlobal - Add a new global entity to the compile unit.
+ /// Number - Value to make label unique.
///
- void AddGlobal(const std::string &Name, DIE *Die);
+ unsigned Number;
+
+ DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
- /// getDieMapSlotFor - Returns the debug information entry map slot for the
- /// specified debug descriptor.
- DIE *&getDieMapSlotFor(DebugInfoDesc *DD) {
- return DescToDieMap[DD];
+ void Profile(FoldingSetNodeID &ID) const {
+ ID.AddString(std::string(Tag));
+ ID.AddInteger(Number);
+ }
+
+#ifndef NDEBUG
+ void print(std::ostream *O) const {
+ if (O) print(*O);
}
+ void print(std::ostream &O) const {
+ O << "." << Tag;
+ if (Number) O << Number;
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
-// Dwarf abbreviation.
+/// 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.
+ /// Attribute - Dwarf attribute code.
+ ///
+ unsigned Attribute;
+
+ /// Form - Dwarf form code.
+ ///
+ unsigned Form;
public:
DIEAbbrevData(unsigned A, unsigned F)
// Accessors.
unsigned getAttribute() const { return Attribute; }
unsigned getForm() const { return Form; }
-
- /// operator== - Used by DIEAbbrev to locate entry.
- ///
- bool operator==(const DIEAbbrevData &DAD) const {
- return Attribute == DAD.Attribute && Form == DAD.Form;
- }
- /// operator!= - Used by DIEAbbrev to locate entry.
- ///
- bool operator!=(const DIEAbbrevData &DAD) const {
- return Attribute != DAD.Attribute || Form != DAD.Form;
- }
-
- /// operator< - Used by DIEAbbrev to locate entry.
+ /// Profile - Used to gather unique data for the abbreviation folding set.
///
- bool operator<(const DIEAbbrevData &DAD) const {
- return Attribute < DAD.Attribute ||
- (Attribute == DAD.Attribute && Form < DAD.Form);
+ void Profile(FoldingSetNodeID &ID)const {
+ ID.AddInteger(Attribute);
+ ID.AddInteger(Form);
}
};
//===----------------------------------------------------------------------===//
-// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
-// information object.
-class DIEAbbrev {
+/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
+/// information object.
+class DIEAbbrev : public FoldingSetNode {
private:
- unsigned Tag; // Dwarf tag code.
- unsigned ChildrenFlag; // Dwarf children flag.
- std::vector<DIEAbbrevData> Data; // Raw data bytes for abbreviation.
+ /// Tag - Dwarf tag code.
+ ///
+ unsigned Tag;
+
+ /// Unique number for node.
+ ///
+ unsigned Number;
+
+ /// ChildrenFlag - Dwarf children flag.
+ ///
+ unsigned ChildrenFlag;
+
+ /// Data - Raw data bytes for abbreviation.
+ ///
+ std::vector<DIEAbbrevData> Data;
public:
// Accessors.
unsigned getTag() const { return Tag; }
+ unsigned getNumber() const { return Number; }
unsigned getChildrenFlag() const { return ChildrenFlag; }
const std::vector<DIEAbbrevData> &getData() const { return Data; }
+ void setTag(unsigned T) { Tag = T; }
void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
-
- /// operator== - Used by UniqueVector to locate entry.
- ///
- bool operator==(const DIEAbbrev &DA) const;
-
- /// operator< - Used by UniqueVector to locate entry.
- ///
- bool operator<(const DIEAbbrev &DA) const;
-
+ void setNumber(unsigned N) { Number = N; }
+
/// AddAttribute - Adds another set of attribute information to the
/// abbreviation.
void AddAttribute(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) {
+ ID.AddInteger(Tag);
+ ID.AddInteger(ChildrenFlag);
+
+ // For each attribute description.
+ for (unsigned i = 0, N = Data.size(); i < N; ++i)
+ Data[i].Profile(ID);
+ }
+
/// Emit - Print the abbreviation using the specified Dwarf writer.
///
- void Emit(const DwarfWriter &DW) const;
+ void Emit(const DwarfDebug &DD) const;
#ifndef NDEBUG
+ void print(std::ostream *O) {
+ if (O) print(*O);
+ }
void print(std::ostream &O);
void dump();
#endif
};
//===----------------------------------------------------------------------===//
-// DIEValue - A debug information entry value.
-//
-class DIEValue {
+/// DIE - A structured debug information entry. Has an abbreviation which
+/// describes it's organization.
+class DIE : public FoldingSetNode {
+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;
+
+ /// Attributes values.
+ ///
+ std::vector<DIEValue *> Values;
+
+public:
+ DIE(unsigned Tag)
+ : Abbrev(Tag, DW_CHILDREN_no)
+ , Offset(0)
+ , Size(0)
+ , Children()
+ , Values()
+ {}
+ 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; }
+ std::vector<DIEValue *> &getValues() { return Values; }
+ 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 SiblingOffset() const { return Offset + Size; }
+
+ /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
+ ///
+ void AddSiblingOffset();
+
+ /// AddChild - Add a child to the DIE.
+ ///
+ void AddChild(DIE *Child) {
+ Abbrev.setChildrenFlag(DW_CHILDREN_yes);
+ Children.push_back(Child);
+ }
+
+ /// Detach - Detaches objects connected to it after copying.
+ ///
+ void Detach() {
+ Children.clear();
+ }
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ void Profile(FoldingSetNodeID &ID) ;
+
+#ifndef NDEBUG
+ void print(std::ostream *O, unsigned IncIndent = 0) {
+ if (O) print(*O, IncIndent);
+ }
+ void print(std::ostream &O, unsigned IncIndent = 0);
+ void dump();
+#endif
+};
+
+//===----------------------------------------------------------------------===//
+/// DIEValue - A debug information entry value.
+///
+class DIEValue : public FoldingSetNode {
public:
enum {
isInteger,
isBlock
};
- unsigned Type; // Type of the value
+ /// Type - Type of data stored in the value.
+ ///
+ unsigned Type;
- DIEValue(unsigned T) : Type(T) {}
+ DIEValue(unsigned T)
+ : Type(T)
+ {}
virtual ~DIEValue() {}
+ // Accessors
+ unsigned getType() const { return Type; }
+
// Implement isa/cast/dyncast.
static bool classof(const DIEValue *) { return true; }
/// EmitValue - Emit value via the Dwarf writer.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const = 0;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
/// SizeOf - Return the size of a value in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const = 0;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ virtual void Profile(FoldingSetNodeID &ID) = 0;
+
+#ifndef NDEBUG
+ void print(std::ostream *O) {
+ if (O) print(*O);
+ }
+ virtual void print(std::ostream &O) = 0;
+ void dump();
+#endif
};
//===----------------------------------------------------------------------===//
-// DWInteger - An integer value DIE.
-//
+/// DWInteger - An integer value DIE.
+///
class DIEInteger : public DIEValue {
private:
uint64_t Integer;
/// BestForm - Choose the best form for integer.
///
- unsigned BestForm(bool IsSigned);
-
+ static unsigned BestForm(bool IsSigned, uint64_t Integer) {
+ if (IsSigned) {
+ if ((char)Integer == (signed)Integer) return DW_FORM_data1;
+ if ((short)Integer == (signed)Integer) return DW_FORM_data2;
+ if ((int)Integer == (signed)Integer) return DW_FORM_data4;
+ } else {
+ if ((unsigned char)Integer == Integer) return DW_FORM_data1;
+ if ((unsigned short)Integer == Integer) return DW_FORM_data2;
+ if ((unsigned int)Integer == Integer) return DW_FORM_data4;
+ }
+ return DW_FORM_data8;
+ }
+
/// EmitValue - Emit integer of appropriate size.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of integer value in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
+ ID.AddInteger(isInteger);
+ ID.AddInteger(Integer);
+ }
+ virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Int: " << (int64_t)Integer
+ << " 0x" << std::hex << Integer << std::dec;
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEString - A string value DIE.
-//
-struct DIEString : public DIEValue {
+/// DIEString - A string value DIE.
+///
+class DIEString : public DIEValue {
+public:
const std::string String;
DIEString(const std::string &S) : DIEValue(isString), String(S) {}
/// EmitValue - Emit string value.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of string value in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ return String.size() + sizeof(char); // sizeof('\0');
+ }
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const std::string &String) {
+ ID.AddInteger(isString);
+ ID.AddString(String);
+ }
+ virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Str: \"" << String << "\"";
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEDwarfLabel - A Dwarf internal label expression DIE.
+/// DIEDwarfLabel - A Dwarf internal label expression DIE.
//
-struct DIEDwarfLabel : public DIEValue {
+class DIEDwarfLabel : public DIEValue {
+public:
+
const DWLabel Label;
DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
/// EmitValue - Emit label value.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of label value in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
+ ID.AddInteger(isLabel);
+ Label.Profile(ID);
+ }
+ virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Lbl: ";
+ Label.print(O);
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEObjectLabel - A label to an object in code or data.
+/// DIEObjectLabel - A label to an object in code or data.
//
-struct DIEObjectLabel : public DIEValue {
+class DIEObjectLabel : public DIEValue {
+public:
const std::string Label;
DIEObjectLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
/// EmitValue - Emit label value.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of label value in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
+ ID.AddInteger(isAsIsLabel);
+ ID.AddString(Label);
+ }
+ virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Obj: " << Label;
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEDelta - A simple label difference DIE.
-//
-struct DIEDelta : public DIEValue {
+/// DIEDelta - A simple label difference DIE.
+///
+class DIEDelta : public DIEValue {
+public:
const DWLabel LabelHi;
const DWLabel LabelLo;
/// EmitValue - Emit delta value.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of delta value in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
+ const DWLabel &LabelLo) {
+ ID.AddInteger(isDelta);
+ LabelHi.Profile(ID);
+ LabelLo.Profile(ID);
+ }
+ virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Del: ";
+ LabelHi.print(O);
+ O << "-";
+ LabelLo.print(O);
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEntry - A pointer to a debug information entry.
-//
-struct DIEntry : public DIEValue {
+/// 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 DIEntry : public DIEValue {
+public:
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 debug information entry offset.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of debug information entry in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ return sizeof(int32_t);
+ }
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
+ ID.AddInteger(isEntry);
+ ID.AddPointer(Entry);
+ }
+ virtual void Profile(FoldingSetNodeID &ID) {
+ ID.AddInteger(isEntry);
+
+ if (Entry) {
+ ID.AddPointer(Entry);
+ } else {
+ ID.AddPointer(this);
+ }
+ }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
+ }
+#endif
};
//===----------------------------------------------------------------------===//
-// DIEBlock - A block of values. Primarily used for location expressions.
+/// DIEBlock - A block of values. Primarily used for location expressions.
//
-struct DIEBlock : public DIEValue {
+class DIEBlock : public DIEValue, public DIE {
+public:
unsigned Size; // Size in bytes excluding size header.
- std::vector<unsigned> Forms; // Data forms.
- std::vector<DIEValue *> Values; // Block values.
DIEBlock()
: DIEValue(isBlock)
+ , DIE(0)
, Size(0)
- , Forms()
- , Values()
{}
- ~DIEBlock();
-
+ ~DIEBlock() {
+ }
+
// Implement isa/cast/dyncast.
static bool classof(const DIEBlock *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isBlock; }
/// ComputeSize - calculate the size of the block.
///
- unsigned ComputeSize(DwarfWriter &DW);
+ unsigned ComputeSize(DwarfDebug &DD);
/// BestForm - Choose the best form for data.
///
- unsigned BestForm();
+ unsigned BestForm() const {
+ if ((unsigned char)Size == Size) return DW_FORM_block1;
+ if ((unsigned short)Size == Size) return DW_FORM_block2;
+ if ((unsigned int)Size == Size) return DW_FORM_block4;
+ return DW_FORM_block;
+ }
/// EmitValue - Emit block data.
///
- virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
/// SizeOf - Determine size of block data in bytes.
///
- virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
+
- /// AddUInt - Add an unsigned integer value.
+ /// Profile - Used to gather unique data for the value folding set.
///
- void AddUInt(unsigned Form, uint64_t Integer);
+ virtual void Profile(FoldingSetNodeID &ID) {
+ ID.AddInteger(isBlock);
+ DIE::Profile(ID);
+ }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Blk: ";
+ DIE::print(O, 5);
+ }
+#endif
+};
- /// AddSInt - Add an signed integer value.
+//===----------------------------------------------------------------------===//
+/// CompileUnit - This dwarf writer support class manages information associate
+/// with a source file.
+class CompileUnit {
+private:
+ /// Desc - Compile unit debug descriptor.
///
- void AddSInt(unsigned Form, int64_t Integer);
-
- /// AddString - Add a std::string value.
+ CompileUnitDesc *Desc;
+
+ /// ID - File identifier for source.
///
- void AddString(unsigned Form, const std::string &String);
-
- /// AddLabel - Add a Dwarf label value.
+ unsigned ID;
+
+ /// Die - Compile unit debug information entry.
///
- void AddLabel(unsigned Form, const DWLabel &Label);
-
- /// AddObjectLabel - Add a non-Dwarf label value.
+ DIE *Die;
+
+ /// DescToDieMap - Tracks the mapping of unit level debug informaton
+ /// descriptors to debug information entries.
+ std::map<DebugInfoDesc *, DIE *> DescToDieMap;
+
+ /// DescToDIEntryMap - Tracks the mapping of unit level debug informaton
+ /// descriptors to debug information entries using a DIEntry proxy.
+ std::map<DebugInfoDesc *, DIEntry *> DescToDIEntryMap;
+
+ /// Globals - A map of globally visible named entities for this unit.
///
- void AddObjectLabel(unsigned Form, const std::string &Label);
-
- /// AddDelta - Add a label delta value.
+ std::map<std::string, DIE *> Globals;
+
+ /// DiesSet - Used to uniquely define dies within the compile unit.
///
- void AddDelta(unsigned Form, const DWLabel &Hi, const DWLabel &Lo);
-
- /// AddDIEntry - Add a DIE value.
+ FoldingSet<DIE> DiesSet;
+
+ /// Dies - List of all dies in the compile unit.
///
- void AddDIEntry(unsigned Form, DIE *Entry);
-
-};
-
-//===----------------------------------------------------------------------===//
-// DIE - A structured debug information entry. Has an abbreviation which
-// 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.
+ std::vector<DIE *> Dies;
public:
- DIE(unsigned Tag);
- ~DIE();
-
- // Accessors.
- unsigned getAbbrevID() const { return AbbrevID; }
- unsigned getOffset() const { return Offset; }
- unsigned getSize() const { return Size; }
- 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; }
+ CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
+ : Desc(CUD)
+ , ID(I)
+ , Die(D)
+ , DescToDieMap()
+ , DescToDIEntryMap()
+ , Globals()
+ , DiesSet(InitDiesSetSize)
+ , Dies()
+ {}
- /// SiblingOffset - Return the offset of the debug information entry's
- /// sibling.
- unsigned SiblingOffset() const { return Offset + Size; }
+ ~CompileUnit() {
+ delete Die;
+
+ for (unsigned i = 0, N = Dies.size(); i < N; ++i)
+ delete Dies[i];
+ }
- /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
- ///
- void AddSiblingOffset();
+ // Accessors.
+ CompileUnitDesc *getDesc() const { return Desc; }
+ unsigned getID() const { return ID; }
+ DIE* getDie() const { return Die; }
+ std::map<std::string, DIE *> &getGlobals() { return Globals; }
- /// AddUInt - Add an unsigned integer attribute data and value.
+ /// hasContent - Return true if this compile unit has something to write out.
///
- void AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer);
+ bool hasContent() const {
+ return !Die->getChildren().empty();
+ }
- /// AddSInt - Add an signed integer attribute data and value.
- ///
- void AddSInt(unsigned Attribute, unsigned Form, int64_t Integer);
-
- /// AddString - Add a std::string attribute data and value.
+ /// AddGlobal - Add a new global entity to the compile unit.
///
- 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);
-
- /// AddObjectLabel - Add a non-Dwarf label attribute data and value.
- ///
- void AddObjectLabel(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);
-
- /// AddBlock - Add block data.
- ///
- void AddBlock(unsigned Attribute, unsigned Form, DIEBlock *Block);
-
- /// Complete - Indicate that all attributes have been added and
- /// ready to get an abbreviation ID.
- ///
- void Complete(DwarfWriter &DW);
+ void AddGlobal(const std::string &Name, DIE *Die) {
+ Globals[Name] = Die;
+ }
- /// AddChild - Add a child to the DIE.
- void AddChild(DIE *Child);
+ /// getDieMapSlotFor - Returns the debug information entry map slot for the
+ /// specified debug descriptor.
+ DIE *&getDieMapSlotFor(DebugInfoDesc *DID) {
+ return DescToDieMap[DID];
+ }
+
+ /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
+ /// specified debug descriptor.
+ DIEntry *&getDIEntrySlotFor(DebugInfoDesc *DID) {
+ return DescToDIEntryMap[DID];
+ }
+
+ /// AddDie - Adds or interns the DIE to the compile unit.
+ ///
+ DIE *AddDie(DIE &Buffer) {
+ FoldingSetNodeID ID;
+ Buffer.Profile(ID);
+ void *Where;
+ DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
+
+ if (!Die) {
+ Die = new DIE(Buffer);
+ DiesSet.InsertNode(Die, Where);
+ this->Die->AddChild(Die);
+ Buffer.Detach();
+ }
+
+ return Die;
+ }
};
-} // End of namespace llvm
-
//===----------------------------------------------------------------------===//
-
-CompileUnit::~CompileUnit() {
- delete Die;
-}
-
-/// hasContent - Return true if this compile unit has something to write out.
+/// Dwarf - Emits general Dwarf directives.
///
-bool CompileUnit::hasContent() const {
- return !Die->getChildren().empty();
-}
+class Dwarf {
-/// AddGlobal - Add a new global entity to the compile unit.
-///
-void CompileUnit::AddGlobal(const std::string &Name, DIE *Die) {
- Globals[Name] = Die;
-}
+protected:
-//===----------------------------------------------------------------------===//
+ //===--------------------------------------------------------------------===//
+ // Core attributes used by the Dwarf writer.
+ //
+
+ //
+ /// O - Stream to .s file.
+ ///
+ std::ostream &O;
-/// operator== - Used by UniqueVector to locate entry.
-///
-bool DIEAbbrev::operator==(const DIEAbbrev &DA) const {
- if (Tag != DA.Tag) return false;
- if (ChildrenFlag != DA.ChildrenFlag) return false;
- if (Data.size() != DA.Data.size()) return false;
+ /// Asm - Target of Dwarf emission.
+ ///
+ AsmPrinter *Asm;
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- if (Data[i] != DA.Data[i]) return false;
- }
+ /// TAI - Target Asm Printer.
+ const TargetAsmInfo *TAI;
- return true;
-}
-
-/// operator< - Used by UniqueVector to locate entry.
-///
-bool DIEAbbrev::operator<(const DIEAbbrev &DA) const {
- if (Tag != DA.Tag) return Tag < DA.Tag;
- if (ChildrenFlag != DA.ChildrenFlag) return ChildrenFlag < DA.ChildrenFlag;
- if (Data.size() != DA.Data.size()) return Data.size() < DA.Data.size();
+ /// TD - Target data.
+ const TargetData *TD;
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- if (Data[i] != DA.Data[i]) return Data[i] < DA.Data[i];
- }
+ /// RI - Register Information.
+ const MRegisterInfo *RI;
- return false;
-}
-
-/// Emit - Print the abbreviation using the specified Dwarf writer.
-///
-void DIEAbbrev::Emit(const DwarfWriter &DW) const {
- // Emit its Dwarf tag type.
- DW.EmitULEB128Bytes(Tag);
- DW.EOL(TagString(Tag));
+ /// M - Current module.
+ ///
+ Module *M;
- // Emit whether it has children DIEs.
- DW.EmitULEB128Bytes(ChildrenFlag);
- DW.EOL(ChildrenString(ChildrenFlag));
+ /// MF - Current machine function.
+ ///
+ MachineFunction *MF;
- // For each attribute description.
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- const DIEAbbrevData &AttrData = Data[i];
-
- // Emit attribute type.
- DW.EmitULEB128Bytes(AttrData.getAttribute());
- DW.EOL(AttributeString(AttrData.getAttribute()));
-
- // Emit form type.
- DW.EmitULEB128Bytes(AttrData.getForm());
- DW.EOL(FormEncodingString(AttrData.getForm()));
+ /// MMI - Collected machine module information.
+ ///
+ MachineModuleInfo *MMI;
+
+ /// SubprogramCount - The running count of functions being compiled.
+ ///
+ unsigned SubprogramCount;
+
+ unsigned SetCounter;
+ Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : O(OS)
+ , Asm(A)
+ , TAI(T)
+ , TD(Asm->TM.getTargetData())
+ , RI(Asm->TM.getRegisterInfo())
+ , M(NULL)
+ , MF(NULL)
+ , MMI(NULL)
+ , SubprogramCount(0)
+ , SetCounter(1)
+ {
}
- // Mark end of abbreviation.
- DW.EmitULEB128Bytes(0); DW.EOL("EOM(1)");
- DW.EmitULEB128Bytes(0); DW.EOL("EOM(2)");
-}
+public:
-#ifndef NDEBUG
-void DIEAbbrev::print(std::ostream &O) {
- O << "Abbreviation @"
- << std::hex << (intptr_t)this << std::dec
- << " "
- << TagString(Tag)
- << " "
- << ChildrenString(ChildrenFlag)
- << "\n";
+ //===--------------------------------------------------------------------===//
+ // Accessors.
+ //
+ AsmPrinter *getAsm() const { return Asm; }
+ MachineModuleInfo *getMMI() const { return MMI; }
+ const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
+
+ /// PrintLabelName - Print label name in form used by Dwarf writer.
+ ///
+ void PrintLabelName(DWLabel Label) const {
+ PrintLabelName(Label.Tag, Label.Number);
+ }
+ void PrintLabelName(const char *Tag, unsigned Number,
+ bool isInSection = false) const {
+ if (isInSection && TAI->getDwarfSectionOffsetDirective())
+ O << TAI->getDwarfSectionOffsetDirective() << Tag;
+ else
+ O << TAI->getPrivateGlobalPrefix() << Tag;
+ if (Number) O << Number;
+ }
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- O << " "
- << AttributeString(Data[i].getAttribute())
- << " "
- << FormEncodingString(Data[i].getForm())
- << "\n";
+ /// EmitLabel - Emit location label for internal use by Dwarf.
+ ///
+ void EmitLabel(DWLabel Label) const {
+ EmitLabel(Label.Tag, Label.Number);
}
-}
-void DIEAbbrev::dump() { print(std::cerr); }
-#endif
-
-//===----------------------------------------------------------------------===//
-
-/// BestForm - Choose the best form for integer.
-///
-unsigned DIEInteger::BestForm(bool IsSigned) {
- if (IsSigned) {
- if ((char)Integer == (signed)Integer) return DW_FORM_data1;
- if ((short)Integer == (signed)Integer) return DW_FORM_data2;
- if ((int)Integer == (signed)Integer) return DW_FORM_data4;
- } else {
- if ((unsigned char)Integer == Integer) return DW_FORM_data1;
- if ((unsigned short)Integer == Integer) return DW_FORM_data2;
- if ((unsigned int)Integer == Integer) return DW_FORM_data4;
+ void EmitLabel(const char *Tag, unsigned Number) const {
+ PrintLabelName(Tag, Number);
+ O << ":\n";
}
- return DW_FORM_data8;
-}
+
+ /// EmitReference - Emit a reference to a label.
+ ///
+ void EmitReference(DWLabel Label, bool IsPCRelative = false) const {
+ EmitReference(Label.Tag, Label.Number, IsPCRelative);
+ }
+ void EmitReference(const char *Tag, unsigned Number,
+ bool IsPCRelative = false) const {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName(Tag, Number);
-/// EmitValue - Emit integer of appropriate size.
-///
-void DIEInteger::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- switch (Form) {
- case DW_FORM_flag: // Fall thru
- case DW_FORM_ref1: // Fall thru
- case DW_FORM_data1: DW.EmitInt8(Integer); break;
- case DW_FORM_ref2: // Fall thru
- case DW_FORM_data2: DW.EmitInt16(Integer); break;
- case DW_FORM_ref4: // Fall thru
- case DW_FORM_data4: DW.EmitInt32(Integer); break;
- case DW_FORM_ref8: // Fall thru
- case DW_FORM_data8: DW.EmitInt64(Integer); break;
- case DW_FORM_udata: DW.EmitULEB128Bytes(Integer); break;
- case DW_FORM_sdata: DW.EmitSLEB128Bytes(Integer); break;
- default: assert(0 && "DIE Value form not supported yet"); break;
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
+ }
+ void EmitReference(const std::string &Name, bool IsPCRelative = false) const {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ O << Name;
+
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
}
-}
-/// SizeOf - Determine size of integer value in bytes.
-///
-unsigned DIEInteger::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- switch (Form) {
- case DW_FORM_flag: // Fall thru
- case DW_FORM_ref1: // Fall thru
- case DW_FORM_data1: return sizeof(int8_t);
- case DW_FORM_ref2: // Fall thru
- case DW_FORM_data2: return sizeof(int16_t);
- case DW_FORM_ref4: // Fall thru
- case DW_FORM_data4: return sizeof(int32_t);
- case DW_FORM_ref8: // Fall thru
- case DW_FORM_data8: return sizeof(int64_t);
- case DW_FORM_udata: return DW.SizeULEB128(Integer);
- case DW_FORM_sdata: return DW.SizeSLEB128(Integer);
- default: assert(0 && "DIE Value form not supported yet"); break;
+ /// 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 LabelHi, DWLabel LabelLo,
+ bool IsSmall = false) {
+ EmitDifference(LabelHi.Tag, LabelHi.Number,
+ LabelLo.Tag, LabelLo.Number,
+ IsSmall);
+ }
+ void EmitDifference(const char *TagHi, unsigned NumberHi,
+ const char *TagLo, unsigned NumberLo,
+ bool IsSmall = false) {
+ if (TAI->needsSet()) {
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter);
+ O << ",";
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
+ O << "\n";
+
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName("set", SetCounter);
+
+ ++SetCounter;
+ } else {
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
+ }
}
- return 0;
-}
-//===----------------------------------------------------------------------===//
+ void EmitSectionOffset(const char* Label, const char* Section,
+ unsigned LabelNumber, unsigned SectionNumber,
+ bool IsSmall = false, bool isEH = false) {
+ bool printAbsolute = false;
+ if (TAI->needsSet()) {
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter);
+ O << ",";
+ PrintLabelName(Label, LabelNumber, true);
+
+ if (isEH)
+ printAbsolute = TAI->isAbsoluteEHSectionOffsets();
+ else
+ printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
+
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
+ O << "\n";
+
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName("set", SetCounter);
+ ++SetCounter;
+ } else {
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName(Label, LabelNumber, true);
-/// EmitValue - Emit string value.
-///
-void DIEString::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- DW.EmitString(String);
-}
+ if (isEH)
+ printAbsolute = TAI->isAbsoluteEHSectionOffsets();
+ else
+ printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
-/// SizeOf - Determine size of string value in bytes.
-///
-unsigned DIEString::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- return String.size() + sizeof(char); // sizeof('\0');
-}
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
+ }
+ }
+
+ /// EmitFrameMoves - Emit frame instructions to describe the layout of the
+ /// frame.
+ void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
+ const std::vector<MachineMove> &Moves) {
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TAI->getAddressSize() : -TAI->getAddressSize();
+ bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
-//===----------------------------------------------------------------------===//
+ for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
+ const MachineMove &Move = Moves[i];
+ unsigned LabelID = Move.getLabelID();
+
+ if (LabelID) {
+ LabelID = MMI->MappedLabel(LabelID);
+
+ // Throw out move if the label is invalid.
+ if (!LabelID) continue;
+ }
+
+ const MachineLocation &Dst = Move.getDestination();
+ const MachineLocation &Src = Move.getSource();
+
+ // Advance row if new location.
+ if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
+ Asm->EmitInt8(DW_CFA_advance_loc4);
+ Asm->EOL("DW_CFA_advance_loc4");
+ EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
+ Asm->EOL();
+
+ BaseLabelID = LabelID;
+ BaseLabel = "label";
+ IsLocal = true;
+ }
+
+ // If advancing cfa.
+ if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
+ if (!Src.isRegister()) {
+ if (Src.getRegister() == MachineLocation::VirtualFP) {
+ Asm->EmitInt8(DW_CFA_def_cfa_offset);
+ Asm->EOL("DW_CFA_def_cfa_offset");
+ } else {
+ Asm->EmitInt8(DW_CFA_def_cfa);
+ Asm->EOL("DW_CFA_def_cfa");
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister()));
+ Asm->EOL("Register");
+ }
+
+ int Offset = -Src.getOffset();
+
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else if (Src.isRegister() &&
+ Src.getRegister() == MachineLocation::VirtualFP) {
+ if (Dst.isRegister()) {
+ Asm->EmitInt8(DW_CFA_def_cfa_register);
+ Asm->EOL("DW_CFA_def_cfa_register");
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister()));
+ Asm->EOL("Register");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else {
+ unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
+ int Offset = Dst.getOffset() / stackGrowth;
+
+ if (Offset < 0) {
+ Asm->EmitInt8(DW_CFA_offset_extended_sf);
+ Asm->EOL("DW_CFA_offset_extended_sf");
+ Asm->EmitULEB128Bytes(Reg);
+ Asm->EOL("Reg");
+ Asm->EmitSLEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else if (Reg < 64) {
+ Asm->EmitInt8(DW_CFA_offset + Reg);
+ Asm->EOL("DW_CFA_offset + Reg");
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else {
+ Asm->EmitInt8(DW_CFA_offset_extended);
+ Asm->EOL("DW_CFA_offset_extended");
+ Asm->EmitULEB128Bytes(Reg);
+ Asm->EOL("Reg");
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ }
+ }
+ }
+ }
-/// EmitValue - Emit label value.
-///
-void DIEDwarfLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- DW.EmitReference(Label);
-}
+};
-/// SizeOf - Determine size of label value in bytes.
-///
-unsigned DIEDwarfLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- return DW.getTargetAsmInfo()->getAddressSize();
-}
-
//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit label value.
+/// DwarfDebug - Emits Dwarf debug directives.
///
-void DIEObjectLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- DW.EmitReference(Label);
-}
+class DwarfDebug : public Dwarf {
-/// SizeOf - Determine size of label value in bytes.
-///
-unsigned DIEObjectLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- return DW.getTargetAsmInfo()->getAddressSize();
-}
-
-//===----------------------------------------------------------------------===//
+private:
+ //===--------------------------------------------------------------------===//
+ // Attributes used to construct specific Dwarf sections.
+ //
+
+ /// CompileUnits - All the compile units involved in this build. The index
+ /// of each entry in this vector corresponds to the sources in MMI.
+ std::vector<CompileUnit *> CompileUnits;
+
+ /// AbbreviationsSet - Used to uniquely define abbreviations.
+ ///
+ FoldingSet<DIEAbbrev> AbbreviationsSet;
-/// EmitValue - Emit delta value.
-///
-void DIEDelta::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- DW.EmitDifference(LabelHi, LabelLo);
-}
+ /// Abbreviations - A list of all the unique abbreviations in use.
+ ///
+ std::vector<DIEAbbrev *> Abbreviations;
+
+ /// ValuesSet - Used to uniquely define values.
+ ///
+ FoldingSet<DIEValue> ValuesSet;
+
+ /// Values - A list of all the unique values in use.
+ ///
+ std::vector<DIEValue *> Values;
+
+ /// StringPool - A UniqueVector of strings used by indirect references.
+ ///
+ UniqueVector<std::string> StringPool;
-/// SizeOf - Determine size of delta value in bytes.
-///
-unsigned DIEDelta::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- return DW.getTargetAsmInfo()->getAddressSize();
-}
+ /// UnitMap - Map debug information descriptor to compile unit.
+ ///
+ std::map<DebugInfoDesc *, CompileUnit *> DescToUnitMap;
+
+ /// SectionMap - Provides a unique id per text section.
+ ///
+ UniqueVector<std::string> SectionMap;
+
+ /// SectionSourceLines - Tracks line numbers per text section.
+ ///
+ std::vector<std::vector<SourceLineInfo> > SectionSourceLines;
-//===----------------------------------------------------------------------===//
-/// EmitValue - Emit debug information entry offset.
-///
-void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- DW.EmitInt32(Entry->getOffset());
-}
+ /// didInitial - Flag to indicate if initial emission has been done.
+ ///
+ bool didInitial;
+
+ /// shouldEmit - Flag to indicate if debug information should be emitted.
+ ///
+ bool shouldEmit;
-/// SizeOf - Determine size of debug information entry value in bytes.
-///
-unsigned DIEntry::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- return sizeof(int32_t);
-}
-
-//===----------------------------------------------------------------------===//
+ struct FunctionDebugFrameInfo {
+ unsigned Number;
+ std::vector<MachineMove> Moves;
-DIEBlock::~DIEBlock() {
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- delete Values[i];
- }
-}
+ FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
+ Number(Num), Moves(M) { };
+ };
-/// ComputeSize - calculate the size of the block.
-///
-unsigned DIEBlock::ComputeSize(DwarfWriter &DW) {
- Size = 0;
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- Size += Values[i]->SizeOf(DW, Forms[i]);
+ std::vector<FunctionDebugFrameInfo> DebugFrames;
+
+public:
+
+ /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
+ ///
+ bool ShouldEmitDwarf() const { return shouldEmit; }
+
+ /// AssignAbbrevNumber - Define a unique number for the abbreviation.
+ ///
+ void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
+ // Profile the node so that we can make it unique.
+ FoldingSetNodeID ID;
+ Abbrev.Profile(ID);
+
+ // Check the set for priors.
+ DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
+
+ // If it's newly added.
+ if (InSet == &Abbrev) {
+ // Add to abbreviation list.
+ Abbreviations.push_back(&Abbrev);
+ // Assign the vector position + 1 as its number.
+ Abbrev.setNumber(Abbreviations.size());
+ } else {
+ // Assign existing abbreviation number.
+ Abbrev.setNumber(InSet->getNumber());
+ }
}
- return Size;
-}
-/// BestForm - Choose the best form for data.
-///
-unsigned DIEBlock::BestForm() {
- if ((unsigned char)Size == Size) return DW_FORM_block1;
- if ((unsigned short)Size == Size) return DW_FORM_block2;
- if ((unsigned int)Size == Size) return DW_FORM_block4;
- return DW_FORM_block;
-}
+ /// NewString - Add a string to the constant pool and returns a label.
+ ///
+ DWLabel NewString(const std::string &String) {
+ unsigned StringID = StringPool.insert(String);
+ return DWLabel("string", StringID);
+ }
+
+ /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
+ /// entry.
+ DIEntry *NewDIEntry(DIE *Entry = NULL) {
+ DIEntry *Value;
+
+ if (Entry) {
+ FoldingSetNodeID ID;
+ DIEntry::Profile(ID, Entry);
+ void *Where;
+ Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
+
+ if (Value) return Value;
+
+ Value = new DIEntry(Entry);
+ ValuesSet.InsertNode(Value, Where);
+ } else {
+ Value = new DIEntry(Entry);
+ }
+
+ Values.push_back(Value);
+ return Value;
+ }
+
+ /// SetDIEntry - Set a DIEntry once the debug information entry is defined.
+ ///
+ void SetDIEntry(DIEntry *Value, DIE *Entry) {
+ Value->Entry = Entry;
+ // Add to values set if not already there. If it is, we merely have a
+ // duplicate in the values list (no harm.)
+ ValuesSet.GetOrInsertNode(Value);
+ }
-/// EmitValue - Emit block data.
-///
-void DIEBlock::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- switch (Form) {
- case DW_FORM_block1: DW.EmitInt8(Size); break;
- case DW_FORM_block2: DW.EmitInt16(Size); break;
- case DW_FORM_block4: DW.EmitInt32(Size); break;
- case DW_FORM_block: DW.EmitULEB128Bytes(Size); break;
- default: assert(0 && "Improper form for block"); break;
+ /// AddUInt - Add an unsigned integer attribute data and value.
+ ///
+ void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
+ if (!Form) Form = DIEInteger::BestForm(false, Integer);
+
+ FoldingSetNodeID ID;
+ DIEInteger::Profile(ID, Integer);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = new DIEInteger(Integer);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
}
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- DW.EOL("");
- Values[i]->EmitValue(DW, Forms[i]);
+
+ /// AddSInt - Add an signed integer attribute data and value.
+ ///
+ void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
+ if (!Form) Form = DIEInteger::BestForm(true, Integer);
+
+ FoldingSetNodeID ID;
+ DIEInteger::Profile(ID, (uint64_t)Integer);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = new DIEInteger(Integer);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+ }
+
+ /// AddString - Add a std::string attribute data and value.
+ ///
+ void AddString(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &String) {
+ FoldingSetNodeID ID;
+ DIEString::Profile(ID, String);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = new DIEString(String);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+ }
+
+ /// AddLabel - Add a Dwarf label attribute data and value.
+ ///
+ void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label) {
+ FoldingSetNodeID ID;
+ DIEDwarfLabel::Profile(ID, Label);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = new DIEDwarfLabel(Label);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+ }
+
+ /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
+ ///
+ void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &Label) {
+ FoldingSetNodeID ID;
+ DIEObjectLabel::Profile(ID, Label);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = new DIEObjectLabel(Label);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+ }
+
+ /// AddDelta - Add a label delta attribute data and value.
+ ///
+ void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Hi, const DWLabel &Lo) {
+ FoldingSetNodeID ID;
+ DIEDelta::Profile(ID, Hi, Lo);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = new DIEDelta(Hi, Lo);
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ }
+
+ Die->AddValue(Attribute, Form, Value);
+ }
+
+ /// AddDIEntry - Add a DIE attribute data and value.
+ ///
+ void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
+ Die->AddValue(Attribute, Form, NewDIEntry(Entry));
}
-}
-/// SizeOf - Determine size of block data in bytes.
-///
-unsigned DIEBlock::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- switch (Form) {
- case DW_FORM_block1: return Size + sizeof(int8_t);
- case DW_FORM_block2: return Size + sizeof(int16_t);
- case DW_FORM_block4: return Size + sizeof(int32_t);
- case DW_FORM_block: return Size + DW.SizeULEB128(Size);
- default: assert(0 && "Improper form for block"); break;
+ /// AddBlock - Add block data.
+ ///
+ void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
+ Block->ComputeSize(*this);
+ FoldingSetNodeID ID;
+ Block->Profile(ID);
+ void *Where;
+ DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
+ if (!Value) {
+ Value = Block;
+ ValuesSet.InsertNode(Value, Where);
+ Values.push_back(Value);
+ } else {
+ delete Block;
+ }
+
+ Die->AddValue(Attribute, Block->BestForm(), Value);
}
- return 0;
-}
-/// AddUInt - Add an unsigned integer value.
-///
-void DIEBlock::AddUInt(unsigned Form, uint64_t Integer) {
- DIEInteger *DI = new DIEInteger(Integer);
- Values.push_back(DI);
- if (Form == 0) Form = DI->BestForm(false);
- Forms.push_back(Form);
-}
+private:
-/// AddSInt - Add an signed integer value.
-///
-void DIEBlock::AddSInt(unsigned Form, int64_t Integer) {
- DIEInteger *DI = new DIEInteger(Integer);
- Values.push_back(DI);
- if (Form == 0) Form = DI->BestForm(true);
- Forms.push_back(Form);
-}
+ /// AddSourceLine - Add location information to specified debug information
+ /// entry.
+ void AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line) {
+ if (File && Line) {
+ CompileUnit *FileUnit = FindCompileUnit(File);
+ unsigned FileID = FileUnit->getID();
+ AddUInt(Die, DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, DW_AT_decl_line, 0, Line);
+ }
+ }
+
+ /// AddAddress - Add an address attribute to a die based on the location
+ /// provided.
+ void AddAddress(DIE *Die, unsigned Attribute,
+ const MachineLocation &Location) {
+ unsigned Reg = RI->getDwarfRegNum(Location.getRegister());
+ DIEBlock *Block = new DIEBlock();
-/// AddString - Add a std::string value.
-///
-void DIEBlock::AddString(unsigned Form, const std::string &String) {
- Values.push_back(new DIEString(String));
- Forms.push_back(Form);
-}
+ if (Location.isRegister()) {
+ if (Reg < 32) {
+ AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
+ } else {
+ AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx);
+ AddUInt(Block, 0, DW_FORM_udata, Reg);
+ }
+ } else {
+ if (Reg < 32) {
+ AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg);
+ } else {
+ AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx);
+ AddUInt(Block, 0, DW_FORM_udata, Reg);
+ }
+ AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
+ }
-/// AddLabel - Add a Dwarf label value.
-///
-void DIEBlock::AddLabel(unsigned Form, const DWLabel &Label) {
- Values.push_back(new DIEDwarfLabel(Label));
- Forms.push_back(Form);
-}
+ AddBlock(Die, Attribute, 0, Block);
+ }
+
+ /// AddBasicType - Add a new basic type attribute to the specified entity.
+ ///
+ void AddBasicType(DIE *Entity, CompileUnit *Unit,
+ const std::string &Name,
+ unsigned Encoding, unsigned Size) {
+ DIE *Die = ConstructBasicType(Unit, Name, Encoding, Size);
+ AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
+ }
+
+ /// ConstructBasicType - Construct a new basic type.
+ ///
+ DIE *ConstructBasicType(CompileUnit *Unit,
+ const std::string &Name,
+ unsigned Encoding, unsigned Size) {
+ DIE Buffer(DW_TAG_base_type);
+ AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
+ AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, Encoding);
+ if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
+ return Unit->AddDie(Buffer);
+ }
+
+ /// AddPointerType - Add a new pointer type attribute to the specified entity.
+ ///
+ void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) {
+ DIE *Die = ConstructPointerType(Unit, Name);
+ AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
+ }
+
+ /// ConstructPointerType - Construct a new pointer type.
+ ///
+ DIE *ConstructPointerType(CompileUnit *Unit, const std::string &Name) {
+ DIE Buffer(DW_TAG_pointer_type);
+ AddUInt(&Buffer, DW_AT_byte_size, 0, TAI->getAddressSize());
+ if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
+ return Unit->AddDie(Buffer);
+ }
+
+ /// AddType - Add a new type attribute to the specified entity.
+ ///
+ void AddType(DIE *Entity, TypeDesc *TyDesc, CompileUnit *Unit) {
+ if (!TyDesc) {
+ AddBasicType(Entity, Unit, "", DW_ATE_signed, sizeof(int32_t));
+ } else {
+ // Check for pre-existence.
+ DIEntry *&Slot = Unit->getDIEntrySlotFor(TyDesc);
+
+ // If it exists then use the existing value.
+ if (Slot) {
+ Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
+ return;
+ }
+
+ if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) {
+ // FIXME - Not sure why programs and variables are coming through here.
+ // Short cut for handling subprogram types (not really a TyDesc.)
+ AddPointerType(Entity, Unit, SubprogramTy->getName());
+ } else if (GlobalVariableDesc *GlobalTy =
+ dyn_cast<GlobalVariableDesc>(TyDesc)) {
+ // FIXME - Not sure why programs and variables are coming through here.
+ // Short cut for handling global variable types (not really a TyDesc.)
+ AddPointerType(Entity, Unit, GlobalTy->getName());
+ } else {
+ // Set up proxy.
+ Slot = NewDIEntry();
+
+ // Construct type.
+ DIE Buffer(DW_TAG_base_type);
+ ConstructType(Buffer, TyDesc, Unit);
+
+ // Add debug information entry to entity and unit.
+ DIE *Die = Unit->AddDie(Buffer);
+ SetDIEntry(Slot, Die);
+ Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
+ }
+ }
+ }
+
+ /// ConstructType - Adds all the required attributes to the type.
+ ///
+ void ConstructType(DIE &Buffer, TypeDesc *TyDesc, CompileUnit *Unit) {
+ // Get core information.
+ const std::string &Name = TyDesc->getName();
+ uint64_t Size = TyDesc->getSize() >> 3;
+
+ if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
+ // Fundamental types like int, float, bool
+ Buffer.setTag(DW_TAG_base_type);
+ AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BasicTy->getEncoding());
+ } else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
+ // Fetch tag.
+ unsigned Tag = DerivedTy->getTag();
+ // FIXME - Workaround for templates.
+ if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
+ // Pointers, typedefs et al.
+ Buffer.setTag(Tag);
+ // Map to main type, void will not have a type.
+ if (TypeDesc *FromTy = DerivedTy->getFromType())
+ AddType(&Buffer, FromTy, Unit);
+ } else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)){
+ // Fetch tag.
+ unsigned Tag = CompTy->getTag();
+
+ // Set tag accordingly.
+ if (Tag == DW_TAG_vector_type)
+ Buffer.setTag(DW_TAG_array_type);
+ else
+ Buffer.setTag(Tag);
+
+ std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
+
+ switch (Tag) {
+ case DW_TAG_vector_type:
+ AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
+ // Fall thru
+ case DW_TAG_array_type: {
+ // Add element type.
+ if (TypeDesc *FromTy = CompTy->getFromType())
+ AddType(&Buffer, FromTy, Unit);
+
+ // Don't emit size attribute.
+ Size = 0;
+
+ // Construct an anonymous type for index type.
+ DIE *IndexTy = ConstructBasicType(Unit, "", DW_ATE_signed,
+ sizeof(int32_t));
+
+ // Add subranges to array type.
+ for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
+ SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]);
+ int64_t Lo = SRD->getLo();
+ int64_t Hi = SRD->getHi();
+ DIE *Subrange = new DIE(DW_TAG_subrange_type);
+
+ // If a range is available.
+ if (Lo != Hi) {
+ AddDIEntry(Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
+ // Only add low if non-zero.
+ if (Lo) AddSInt(Subrange, DW_AT_lower_bound, 0, Lo);
+ AddSInt(Subrange, DW_AT_upper_bound, 0, Hi);
+ }
+
+ Buffer.AddChild(Subrange);
+ }
+ break;
+ }
+ case DW_TAG_structure_type:
+ case DW_TAG_union_type: {
+ // Add elements to structure type.
+ for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
+ DebugInfoDesc *Element = Elements[i];
+
+ if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)){
+ // Add field or base class.
+
+ unsigned Tag = MemberDesc->getTag();
+
+ // Extract the basic information.
+ const std::string &Name = MemberDesc->getName();
+ uint64_t Size = MemberDesc->getSize();
+ uint64_t Align = MemberDesc->getAlign();
+ uint64_t Offset = MemberDesc->getOffset();
+
+ // Construct member debug information entry.
+ DIE *Member = new DIE(Tag);
+
+ // Add name if not "".
+ if (!Name.empty())
+ AddString(Member, DW_AT_name, DW_FORM_string, Name);
+ // Add location if available.
+ AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
+
+ // Most of the time the field info is the same as the members.
+ uint64_t FieldSize = Size;
+ uint64_t FieldAlign = Align;
+ uint64_t FieldOffset = Offset;
+
+ // Set the member type.
+ TypeDesc *FromTy = MemberDesc->getFromType();
+ AddType(Member, FromTy, Unit);
+
+ // Walk up typedefs until a real size is found.
+ while (FromTy) {
+ if (FromTy->getTag() != DW_TAG_typedef) {
+ FieldSize = FromTy->getSize();
+ FieldAlign = FromTy->getSize();
+ break;
+ }
+
+ FromTy = dyn_cast<DerivedTypeDesc>(FromTy)->getFromType();
+ }
+
+ // Unless we have a bit field.
+ if (Tag == DW_TAG_member && FieldSize != Size) {
+ // Construct the alignment mask.
+ uint64_t AlignMask = ~(FieldAlign - 1);
+ // Determine the high bit + 1 of the declared size.
+ uint64_t HiMark = (Offset + FieldSize) & AlignMask;
+ // Work backwards to determine the base offset of the field.
+ FieldOffset = HiMark - FieldSize;
+ // Now normalize offset to the field.
+ Offset -= FieldOffset;
+
+ // Maybe we need to work from the other end.
+ if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
+
+ // Add size and offset.
+ AddUInt(Member, DW_AT_byte_size, 0, FieldSize >> 3);
+ AddUInt(Member, DW_AT_bit_size, 0, Size);
+ AddUInt(Member, DW_AT_bit_offset, 0, Offset);
+ }
+
+ // Add computation for offset.
+ DIEBlock *Block = new DIEBlock();
+ AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
+ AddUInt(Block, 0, DW_FORM_udata, FieldOffset >> 3);
+ AddBlock(Member, DW_AT_data_member_location, 0, Block);
+
+ // Add accessibility (public default unless is base class.
+ if (MemberDesc->isProtected()) {
+ AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_protected);
+ } else if (MemberDesc->isPrivate()) {
+ AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_private);
+ } else if (Tag == DW_TAG_inheritance) {
+ AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_public);
+ }
+
+ Buffer.AddChild(Member);
+ } else if (GlobalVariableDesc *StaticDesc =
+ dyn_cast<GlobalVariableDesc>(Element)) {
+ // Add static member.
+
+ // Construct member debug information entry.
+ DIE *Static = new DIE(DW_TAG_variable);
+
+ // Add name and mangled name.
+ const std::string &Name = StaticDesc->getName();
+ const std::string &LinkageName = StaticDesc->getLinkageName();
+ AddString(Static, DW_AT_name, DW_FORM_string, Name);
+ if (!LinkageName.empty()) {
+ AddString(Static, DW_AT_MIPS_linkage_name, DW_FORM_string,
+ LinkageName);
+ }
+
+ // Add location.
+ AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine());
+
+ // Add type.
+ if (TypeDesc *StaticTy = StaticDesc->getType())
+ AddType(Static, StaticTy, Unit);
+
+ // Add flags.
+ if (!StaticDesc->isStatic())
+ AddUInt(Static, DW_AT_external, DW_FORM_flag, 1);
+ AddUInt(Static, DW_AT_declaration, DW_FORM_flag, 1);
+
+ Buffer.AddChild(Static);
+ } else if (SubprogramDesc *MethodDesc =
+ dyn_cast<SubprogramDesc>(Element)) {
+ // Add member function.
+
+ // Construct member debug information entry.
+ DIE *Method = new DIE(DW_TAG_subprogram);
+
+ // Add name and mangled name.
+ const std::string &Name = MethodDesc->getName();
+ const std::string &LinkageName = MethodDesc->getLinkageName();
+
+ AddString(Method, DW_AT_name, DW_FORM_string, Name);
+ bool IsCTor = TyDesc->getName() == Name;
+
+ if (!LinkageName.empty()) {
+ AddString(Method, DW_AT_MIPS_linkage_name, DW_FORM_string,
+ LinkageName);
+ }
+
+ // Add location.
+ AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine());
+
+ // Add type.
+ if (CompositeTypeDesc *MethodTy =
+ dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) {
+ // Get argument information.
+ std::vector<DebugInfoDesc *> &Args = MethodTy->getElements();
+
+ // If not a ctor.
+ if (!IsCTor) {
+ // Add return type.
+ AddType(Method, dyn_cast<TypeDesc>(Args[0]), Unit);
+ }
+
+ // Add arguments.
+ for(unsigned i = 1, N = Args.size(); i < N; ++i) {
+ DIE *Arg = new DIE(DW_TAG_formal_parameter);
+ AddType(Arg, cast<TypeDesc>(Args[i]), Unit);
+ AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1);
+ Method->AddChild(Arg);
+ }
+ }
+
+ // Add flags.
+ if (!MethodDesc->isStatic())
+ AddUInt(Method, DW_AT_external, DW_FORM_flag, 1);
+ AddUInt(Method, DW_AT_declaration, DW_FORM_flag, 1);
+
+ Buffer.AddChild(Method);
+ }
+ }
+ break;
+ }
+ case DW_TAG_enumeration_type: {
+ // Add enumerators to enumeration type.
+ for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
+ EnumeratorDesc *ED = cast<EnumeratorDesc>(Elements[i]);
+ const std::string &Name = ED->getName();
+ int64_t Value = ED->getValue();
+ DIE *Enumerator = new DIE(DW_TAG_enumerator);
+ AddString(Enumerator, DW_AT_name, DW_FORM_string, Name);
+ AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
+ Buffer.AddChild(Enumerator);
+ }
+
+ break;
+ }
+ case DW_TAG_subroutine_type: {
+ // Add prototype flag.
+ AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
+ // Add return type.
+ AddType(&Buffer, dyn_cast<TypeDesc>(Elements[0]), Unit);
+
+ // Add arguments.
+ for(unsigned i = 1, N = Elements.size(); i < N; ++i) {
+ DIE *Arg = new DIE(DW_TAG_formal_parameter);
+ AddType(Arg, cast<TypeDesc>(Elements[i]), Unit);
+ Buffer.AddChild(Arg);
+ }
+
+ break;
+ }
+ default: break;
+ }
+ }
+
+ // Add size if non-zero (derived types don't have a size.)
+ if (Size) AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
+ // Add source line info if available.
+ AddSourceLine(&Buffer, TyDesc->getFile(), TyDesc->getLine());
+ }
+
+ /// NewCompileUnit - Create new compile unit and it's debug information entry.
+ ///
+ CompileUnit *NewCompileUnit(CompileUnitDesc *UnitDesc, unsigned ID) {
+ // Construct debug information entry.
+ DIE *Die = new DIE(DW_TAG_compile_unit);
+ if (TAI->isAbsoluteDebugSectionOffsets())
+ AddLabel(Die, DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0));
+ else
+ AddDelta(Die, DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0),
+ DWLabel("section_line", 0));
+ AddString(Die, DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
+ AddUInt (Die, DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
+ AddString(Die, DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
+ AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
-/// AddObjectLabel - Add a non-Dwarf label value.
-///
-void DIEBlock::AddObjectLabel(unsigned Form, const std::string &Label) {
- Values.push_back(new DIEObjectLabel(Label));
- Forms.push_back(Form);
-}
+ // Construct compile unit.
+ CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
-/// AddDelta - Add a label delta value.
-///
-void DIEBlock::AddDelta(unsigned Form, const DWLabel &Hi, const DWLabel &Lo) {
- Values.push_back(new DIEDelta(Hi, Lo));
- Forms.push_back(Form);
-}
+ // Add Unit to compile unit map.
+ DescToUnitMap[UnitDesc] = Unit;
-/// AddDIEntry - Add a DIE value.
-///
-void DIEBlock::AddDIEntry(unsigned Form, DIE *Entry) {
- Values.push_back(new DIEntry(Entry));
- Forms.push_back(Form);
-}
-
-//===----------------------------------------------------------------------===//
-
-DIE::DIE(unsigned Tag)
-: Abbrev(new DIEAbbrev(Tag, DW_CHILDREN_no))
-, AbbrevID(0)
-, Offset(0)
-, Size(0)
-, Children()
-, Values()
-{}
+ return Unit;
+ }
-DIE::~DIE() {
- if (Abbrev) delete Abbrev;
-
- for (unsigned i = 0, N = Children.size(); i < N; ++i) {
- delete Children[i];
+ /// GetBaseCompileUnit - Get the main compile unit.
+ ///
+ CompileUnit *GetBaseCompileUnit() const {
+ CompileUnit *Unit = CompileUnits[0];
+ assert(Unit && "Missing compile unit.");
+ return Unit;
}
- for (unsigned j = 0, M = Values.size(); j < M; ++j) {
- delete Values[j];
+ /// FindCompileUnit - Get the compile unit for the given descriptor.
+ ///
+ CompileUnit *FindCompileUnit(CompileUnitDesc *UnitDesc) {
+ CompileUnit *Unit = DescToUnitMap[UnitDesc];
+ assert(Unit && "Missing compile unit.");
+ return Unit;
}
-}
-
-/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
-///
-void DIE::AddSiblingOffset() {
- DIEInteger *DI = new DIEInteger(0);
- Values.insert(Values.begin(), DI);
- Abbrev->AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
-}
-/// AddUInt - Add an unsigned integer attribute data and value.
-///
-void DIE::AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer) {
- DIEInteger *DI = new DIEInteger(Integer);
- Values.push_back(DI);
- if (!Form) Form = DI->BestForm(false);
- Abbrev->AddAttribute(Attribute, Form);
-}
+ /// NewGlobalVariable - Add a new global variable DIE.
+ ///
+ DIE *NewGlobalVariable(GlobalVariableDesc *GVD) {
+ // Get the compile unit context.
+ CompileUnitDesc *UnitDesc =
+ static_cast<CompileUnitDesc *>(GVD->getContext());
+ CompileUnit *Unit = GetBaseCompileUnit();
+
+ // Check for pre-existence.
+ DIE *&Slot = Unit->getDieMapSlotFor(GVD);
+ if (Slot) return Slot;
-/// AddSInt - Add an signed integer attribute data and value.
-///
-void DIE::AddSInt(unsigned Attribute, unsigned Form, int64_t Integer) {
- DIEInteger *DI = new DIEInteger(Integer);
- Values.push_back(DI);
- if (!Form) Form = DI->BestForm(true);
- Abbrev->AddAttribute(Attribute, Form);
-}
+ // Get the global variable itself.
+ GlobalVariable *GV = GVD->getGlobalVariable();
+
+ const std::string &Name = GVD->getName();
+ const std::string &FullName = GVD->getFullName();
+ const std::string &LinkageName = GVD->getLinkageName();
+ // Create the global's variable DIE.
+ DIE *VariableDie = new DIE(DW_TAG_variable);
+ AddString(VariableDie, DW_AT_name, DW_FORM_string, Name);
+ if (!LinkageName.empty()) {
+ AddString(VariableDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
+ LinkageName);
+ }
+ AddType(VariableDie, GVD->getType(), Unit);
+ if (!GVD->isStatic())
+ AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1);
-/// AddString - Add a std::string attribute data and value.
-///
-void DIE::AddString(unsigned Attribute, unsigned Form,
- const std::string &String) {
- Values.push_back(new DIEString(String));
- Abbrev->AddAttribute(Attribute, Form);
-}
+ // Add source line info if available.
+ AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
-/// AddLabel - Add a Dwarf label attribute data and value.
-///
-void DIE::AddLabel(unsigned Attribute, unsigned Form,
- const DWLabel &Label) {
- Values.push_back(new DIEDwarfLabel(Label));
- Abbrev->AddAttribute(Attribute, Form);
-}
+ // Add address.
+ DIEBlock *Block = new DIEBlock();
+ AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
+ AddObjectLabel(Block, 0, DW_FORM_udata, Asm->getGlobalLinkName(GV));
+ AddBlock(VariableDie, DW_AT_location, 0, Block);
-/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
-///
-void DIE::AddObjectLabel(unsigned Attribute, unsigned Form,
- const std::string &Label) {
- Values.push_back(new DIEObjectLabel(Label));
- Abbrev->AddAttribute(Attribute, Form);
-}
+ // Add to map.
+ Slot = VariableDie;
+
+ // Add to context owner.
+ Unit->getDie()->AddChild(VariableDie);
-/// AddDelta - Add a label delta attribute data and value.
-///
-void DIE::AddDelta(unsigned Attribute, unsigned Form,
- const DWLabel &Hi, const DWLabel &Lo) {
- Values.push_back(new DIEDelta(Hi, Lo));
- Abbrev->AddAttribute(Attribute, Form);
-}
+ // Expose as global.
+ // FIXME - need to check external flag.
+ Unit->AddGlobal(FullName, VariableDie);
-/// AddDIEntry - Add a DIE attribute data and value.
-///
-void DIE::AddDIEntry(unsigned Attribute, unsigned Form, DIE *Entry) {
- Values.push_back(new DIEntry(Entry));
- Abbrev->AddAttribute(Attribute, Form);
-}
-
-/// AddBlock - Add block data.
-///
-void DIE::AddBlock(unsigned Attribute, unsigned Form, DIEBlock *Block) {
- assert(Block->Size && "Block size has not been computed");
- Values.push_back(Block);
- if (!Form) Form = Block->BestForm();
- Abbrev->AddAttribute(Attribute, Form);
-}
-
-/// Complete - Indicate that all attributes have been added and ready to get an
-/// abbreviation ID.
-void DIE::Complete(DwarfWriter &DW) {
- AbbrevID = DW.NewAbbreviation(Abbrev);
- delete Abbrev;
- Abbrev = NULL;
-}
-
-/// AddChild - Add a child to the DIE.
-///
-void DIE::AddChild(DIE *Child) {
- assert(Abbrev && "Adding children without an abbreviation");
- Abbrev->setChildrenFlag(DW_CHILDREN_yes);
- Children.push_back(Child);
-}
+ return VariableDie;
+ }
-//===----------------------------------------------------------------------===//
+ /// NewSubprogram - Add a new subprogram DIE.
+ ///
+ DIE *NewSubprogram(SubprogramDesc *SPD) {
+ // Get the compile unit context.
+ CompileUnitDesc *UnitDesc =
+ static_cast<CompileUnitDesc *>(SPD->getContext());
+ CompileUnit *Unit = GetBaseCompileUnit();
+
+ // Check for pre-existence.
+ DIE *&Slot = Unit->getDieMapSlotFor(SPD);
+ if (Slot) return Slot;
+
+ // Gather the details (simplify add attribute code.)
+ const std::string &Name = SPD->getName();
+ const std::string &FullName = SPD->getFullName();
+ const std::string &LinkageName = SPD->getLinkageName();
+
+ DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
+ AddString(SubprogramDie, DW_AT_name, DW_FORM_string, Name);
+ if (!LinkageName.empty()) {
+ AddString(SubprogramDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
+ LinkageName);
+ }
+ if (SPD->getType()) AddType(SubprogramDie, SPD->getType(), Unit);
+ if (!SPD->isStatic())
+ AddUInt(SubprogramDie, DW_AT_external, DW_FORM_flag, 1);
+ AddUInt(SubprogramDie, DW_AT_prototyped, DW_FORM_flag, 1);
+
+ // Add source line info if available.
+ AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
+
+ // Add to map.
+ Slot = SubprogramDie;
+
+ // Add to context owner.
+ Unit->getDie()->AddChild(SubprogramDie);
+
+ // Expose as global.
+ Unit->AddGlobal(FullName, SubprogramDie);
+
+ return SubprogramDie;
+ }
-/// DwarfWriter
+ /// NewScopeVariable - Create a new scope variable.
+ ///
+ DIE *NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) {
+ // Get the descriptor.
+ VariableDesc *VD = DV->getDesc();
+
+ // Translate tag to proper Dwarf tag. The result variable is dropped for
+ // now.
+ unsigned Tag;
+ switch (VD->getTag()) {
+ case DW_TAG_return_variable: return NULL;
+ case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
+ case DW_TAG_auto_variable: // fall thru
+ default: Tag = DW_TAG_variable; break;
+ }
-//===----------------------------------------------------------------------===//
+ // Define variable debug information entry.
+ DIE *VariableDie = new DIE(Tag);
+ AddString(VariableDie, DW_AT_name, DW_FORM_string, VD->getName());
-/// PrintHex - Print a value as a hexidecimal value.
-///
-void DwarfWriter::PrintHex(int Value) const {
- O << "0x" << std::hex << Value << std::dec;
-}
+ // Add source line info if available.
+ AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
+
+ // Add variable type.
+ AddType(VariableDie, VD->getType(), Unit);
+
+ // Add variable address.
+ MachineLocation Location;
+ RI->getLocation(*MF, DV->getFrameIndex(), Location);
+ AddAddress(VariableDie, DW_AT_location, Location);
-/// EOL - Print a newline character to asm stream. If a comment is present
-/// then it will be printed first. Comments should not contain '\n'.
-void DwarfWriter::EOL(const std::string &Comment) const {
- if (DwarfVerbose && !Comment.empty()) {
- O << "\t"
- << TAI->getCommentString()
- << " "
- << Comment;
+ return VariableDie;
}
- O << "\n";
-}
-/// EmitAlign - Print a align directive.
-///
-void DwarfWriter::EmitAlign(unsigned Alignment) const {
- O << TAI->getAlignDirective() << Alignment << "\n";
-}
+ /// ConstructScope - Construct the components of a scope.
+ ///
+ void ConstructScope(DebugScope *ParentScope,
+ unsigned ParentStartID, unsigned ParentEndID,
+ DIE *ParentDie, CompileUnit *Unit) {
+ // Add variables to scope.
+ std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
+ for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
+ DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
+ if (VariableDie) ParentDie->AddChild(VariableDie);
+ }
+
+ // Add nested scopes.
+ std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
+ for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
+ // Define the Scope debug information entry.
+ DebugScope *Scope = Scopes[j];
+ // FIXME - Ignore inlined functions for the time being.
+ if (!Scope->getParent()) continue;
+
+ unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
+ unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
-/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
-/// unsigned leb128 value.
-void DwarfWriter::EmitULEB128Bytes(unsigned Value) const {
- if (TAI->hasLEB128()) {
- O << "\t.uleb128\t"
- << Value;
- } else {
- O << TAI->getData8bitsDirective();
- PrintULEB128(Value);
+ // Ignore empty scopes.
+ if (StartID == EndID && StartID != 0) continue;
+ if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
+
+ if (StartID == ParentStartID && EndID == ParentEndID) {
+ // Just add stuff to the parent scope.
+ ConstructScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
+ } else {
+ DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
+
+ // Add the scope bounds.
+ if (StartID) {
+ AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
+ DWLabel("label", StartID));
+ } else {
+ AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ }
+ if (EndID) {
+ AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
+ DWLabel("label", EndID));
+ } else {
+ AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+ }
+
+ // Add the scope contents.
+ ConstructScope(Scope, StartID, EndID, ScopeDie, Unit);
+ ParentDie->AddChild(ScopeDie);
+ }
+ }
}
-}
-/// EmitSLEB128Bytes - Emit an assembler byte data directive to compose a
-/// signed leb128 value.
-void DwarfWriter::EmitSLEB128Bytes(int Value) const {
- if (TAI->hasLEB128()) {
- O << "\t.sleb128\t"
- << Value;
- } else {
- O << TAI->getData8bitsDirective();
- PrintSLEB128(Value);
+ /// ConstructRootScope - Construct the scope for the subprogram.
+ ///
+ void ConstructRootScope(DebugScope *RootScope) {
+ // Exit if there is no root scope.
+ if (!RootScope) return;
+
+ // Get the subprogram debug information entry.
+ SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
+
+ // Get the compile unit context.
+ CompileUnit *Unit = GetBaseCompileUnit();
+
+ // Get the subprogram die.
+ DIE *SPDie = Unit->getDieMapSlotFor(SPD);
+ assert(SPDie && "Missing subprogram descriptor");
+
+ // Add the function bounds.
+ AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, DW_AT_frame_base, Location);
+
+ ConstructScope(RootScope, 0, 0, SPDie, Unit);
}
-}
-
-/// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
-/// representing an unsigned leb128 value.
-void DwarfWriter::PrintULEB128(unsigned Value) const {
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- if (Value) Byte |= 0x80;
- PrintHex(Byte);
- if (Value) O << ", ";
- } while (Value);
-}
-
-/// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
-/// value.
-unsigned DwarfWriter::SizeULEB128(unsigned Value) {
- unsigned Size = 0;
- do {
- Value >>= 7;
- Size += sizeof(int8_t);
- } while (Value);
- return Size;
-}
-
-/// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
-/// representing a signed leb128 value.
-void DwarfWriter::PrintSLEB128(int Value) const {
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
-
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- if (IsMore) Byte |= 0x80;
- PrintHex(Byte);
- if (IsMore) O << ", ";
- } while (IsMore);
-}
-
-/// SizeSLEB128 - Compute the number of bytes required for a signed leb128
-/// value.
-unsigned DwarfWriter::SizeSLEB128(int Value) {
- unsigned Size = 0;
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
-
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- Size += sizeof(int8_t);
- } while (IsMore);
- return Size;
-}
-
-/// EmitInt8 - Emit a byte directive and value.
-///
-void DwarfWriter::EmitInt8(int Value) const {
- O << TAI->getData8bitsDirective();
- PrintHex(Value & 0xFF);
-}
-
-/// EmitInt16 - Emit a short directive and value.
-///
-void DwarfWriter::EmitInt16(int Value) const {
- O << TAI->getData16bitsDirective();
- PrintHex(Value & 0xFFFF);
-}
-
-/// EmitInt32 - Emit a long directive and value.
-///
-void DwarfWriter::EmitInt32(int Value) const {
- O << TAI->getData32bitsDirective();
- PrintHex(Value);
-}
-/// EmitInt64 - Emit a long long directive and value.
-///
-void DwarfWriter::EmitInt64(uint64_t Value) const {
- if (TAI->getData64bitsDirective()) {
- O << TAI->getData64bitsDirective() << "0x" << std::hex << Value << std::dec;
- } else {
- if (TD->isBigEndian()) {
- EmitInt32(unsigned(Value >> 32)); O << "\n";
- EmitInt32(unsigned(Value));
- } else {
- EmitInt32(unsigned(Value)); O << "\n";
- EmitInt32(unsigned(Value >> 32));
+ /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
+ /// tools to recognize the object file contains Dwarf information.
+ void EmitInitial() {
+ // Check to see if we already emitted intial headers.
+ if (didInitial) return;
+ didInitial = true;
+
+ // Dwarf sections base addresses.
+ if (TAI->doesDwarfRequireFrameSection()) {
+ Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
+ EmitLabel("section_debug_frame", 0);
}
+ Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
+ EmitLabel("section_info", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
+ EmitLabel("section_abbrev", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
+ EmitLabel("section_aranges", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
+ EmitLabel("section_macinfo", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfLineSection());
+ EmitLabel("section_line", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfLocSection());
+ EmitLabel("section_loc", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
+ EmitLabel("section_pubnames", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfStrSection());
+ EmitLabel("section_str", 0);
+ Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
+ EmitLabel("section_ranges", 0);
+
+ Asm->SwitchToTextSection(TAI->getTextSection());
+ EmitLabel("text_begin", 0);
+ Asm->SwitchToDataSection(TAI->getDataSection());
+ EmitLabel("data_begin", 0);
}
-}
-/// EmitString - Emit a string with quotes and a null terminator.
-/// Special characters are emitted properly. (Eg. '\t')
-void DwarfWriter::EmitString(const std::string &String) const {
- O << TAI->getAsciiDirective()
- << "\"";
- for (unsigned i = 0, N = String.size(); i < N; ++i) {
- unsigned char C = String[i];
-
- if (!isascii(C) || iscntrl(C)) {
- switch(C) {
- case '\b': O << "\\b"; break;
- case '\f': O << "\\f"; break;
- case '\n': O << "\\n"; break;
- case '\r': O << "\\r"; break;
- case '\t': O << "\\t"; break;
- default:
- O << '\\';
- O << char('0' + ((C >> 6) & 7));
- O << char('0' + ((C >> 3) & 7));
- O << char('0' + ((C >> 0) & 7));
+ /// EmitDIE - Recusively Emits a debug information entry.
+ ///
+ void EmitDIE(DIE *Die) {
+ // Get the abbreviation for this DIE.
+ unsigned AbbrevNumber = Die->getAbbrevNumber();
+ const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
+
+ Asm->EOL();
+
+ // Emit the code (index) for the abbreviation.
+ Asm->EmitULEB128Bytes(AbbrevNumber);
+ Asm->EOL(std::string("Abbrev [" +
+ utostr(AbbrevNumber) +
+ "] 0x" + utohexstr(Die->getOffset()) +
+ ":0x" + utohexstr(Die->getSize()) + " " +
+ TagString(Abbrev->getTag())));
+
+ std::vector<DIEValue *> &Values = Die->getValues();
+ const std::vector<DIEAbbrevData> &AbbrevData = Abbrev->getData();
+
+ // Emit the DIE attribute values.
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ unsigned Attr = AbbrevData[i].getAttribute();
+ unsigned Form = AbbrevData[i].getForm();
+ assert(Form && "Too many attributes for DIE (check abbreviation)");
+
+ switch (Attr) {
+ case DW_AT_sibling: {
+ Asm->EmitInt32(Die->SiblingOffset());
break;
}
- } else if (C == '\"') {
- O << "\\\"";
- } else if (C == '\'') {
- O << "\\\'";
- } else {
- O << C;
+ default: {
+ // Emit an attribute using the defined form.
+ Values[i]->EmitValue(*this, Form);
+ break;
+ }
+ }
+
+ Asm->EOL(AttributeString(Attr));
+ }
+
+ // Emit the DIE children if any.
+ if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
+ const std::vector<DIE *> &Children = Die->getChildren();
+
+ for (unsigned j = 0, M = Children.size(); j < M; ++j) {
+ EmitDIE(Children[j]);
+ }
+
+ Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
}
}
- O << "\\0\"";
-}
-
-/// PrintLabelName - Print label name in form used by Dwarf writer.
-///
-void DwarfWriter::PrintLabelName(const char *Tag, unsigned Number) const {
- O << TAI->getPrivateGlobalPrefix()
- << "debug_"
- << Tag;
- if (Number) O << Number;
-}
-
-/// EmitLabel - Emit location label for internal use by Dwarf.
-///
-void DwarfWriter::EmitLabel(const char *Tag, unsigned Number) const {
- PrintLabelName(Tag, Number);
- O << ":\n";
-}
-/// EmitReference - Emit a reference to a label.
-///
-void DwarfWriter::EmitReference(const char *Tag, unsigned Number) const {
- if (TAI->getAddressSize() == 4)
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+ /// SizeAndOffsetDie - Compute the size and offset of a DIE.
+ ///
+ unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
+ // Get the children.
+ const std::vector<DIE *> &Children = Die->getChildren();
- PrintLabelName(Tag, Number);
-}
-void DwarfWriter::EmitReference(const std::string &Name) const {
- if (TAI->getAddressSize() == 4)
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+ // If not last sibling and has children then add sibling offset attribute.
+ if (!Last && !Children.empty()) Die->AddSiblingOffset();
+
+ // Record the abbreviation.
+ AssignAbbrevNumber(Die->getAbbrev());
+
+ // Get the abbreviation for this DIE.
+ unsigned AbbrevNumber = Die->getAbbrevNumber();
+ const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
+
+ // Set DIE offset
+ Die->setOffset(Offset);
- O << Name;
-}
+ // Start the size with the size of abbreviation code.
+ Offset += Asm->SizeULEB128(AbbrevNumber);
+
+ const std::vector<DIEValue *> &Values = Die->getValues();
+ const std::vector<DIEAbbrevData> &AbbrevData = Abbrev->getData();
-/// EmitDifference - Emit an label difference as sizeof(pointer) value. Some
-/// assemblers do not accept absolute expressions with data directives, so there
-/// is an option (needsSet) to use an intermediary 'set' expression.
-void DwarfWriter::EmitDifference(const char *TagHi, unsigned NumberHi,
- const char *TagLo, unsigned NumberLo) const {
- if (TAI->needsSet()) {
- static unsigned SetCounter = 0;
-
- O << "\t.set\t";
- PrintLabelName("set", SetCounter);
- O << ",";
- PrintLabelName(TagHi, NumberHi);
- O << "-";
- PrintLabelName(TagLo, NumberLo);
- O << "\n";
+ // Size the DIE attribute values.
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ // Size attribute value.
+ Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
+ }
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+ // Size the DIE children if any.
+ if (!Children.empty()) {
+ assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
+ "Children flag not set");
- PrintLabelName("set", SetCounter);
-
- ++SetCounter;
- } else {
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
+ for (unsigned j = 0, M = Children.size(); j < M; ++j) {
+ Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
+ }
- PrintLabelName(TagHi, NumberHi);
- O << "-";
- PrintLabelName(TagLo, NumberLo);
- }
-}
+ // End of children marker.
+ Offset += sizeof(int8_t);
+ }
-/// NewAbbreviation - Add the abbreviation to the Abbreviation vector.
-///
-unsigned DwarfWriter::NewAbbreviation(DIEAbbrev *Abbrev) {
- return Abbreviations.insert(*Abbrev);
-}
+ Die->setSize(Offset - Die->getOffset());
+ return Offset;
+ }
-/// NewString - Add a string to the constant pool and returns a label.
-///
-DWLabel DwarfWriter::NewString(const std::string &String) {
- unsigned StringID = StringPool.insert(String);
- return DWLabel("string", StringID);
-}
+ /// SizeAndOffsets - Compute the size and offset of all the DIEs.
+ ///
+ void SizeAndOffsets() {
+ // Process base compile unit.
+ CompileUnit *Unit = GetBaseCompileUnit();
+ // Compute size of compile unit header
+ unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
+ sizeof(int16_t) + // DWARF version number
+ sizeof(int32_t) + // Offset Into Abbrev. Section
+ sizeof(int8_t); // Pointer Size (in bytes)
+ SizeAndOffsetDie(Unit->getDie(), Offset, true);
+ }
-/// AddSourceLine - Add location information to specified debug information
-/// entry.
-void DwarfWriter::AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line){
- if (File && Line) {
- CompileUnit *FileUnit = FindCompileUnit(File);
- unsigned FileID = FileUnit->getID();
- Die->AddUInt(DW_AT_decl_file, 0, FileID);
- Die->AddUInt(DW_AT_decl_line, 0, Line);
+ /// EmitDebugInfo - Emit the debug info section.
+ ///
+ void EmitDebugInfo() {
+ // Start debug info section.
+ Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
+
+ CompileUnit *Unit = GetBaseCompileUnit();
+ DIE *Die = Unit->getDie();
+ // Emit the compile units header.
+ EmitLabel("info_begin", Unit->getID());
+ // Emit size of content not including length itself
+ unsigned ContentSize = Die->getSize() +
+ sizeof(int16_t) + // DWARF version number
+ sizeof(int32_t) + // Offset Into Abbrev. Section
+ sizeof(int8_t) + // Pointer Size (in bytes)
+ sizeof(int32_t); // FIXME - extra pad for gdb bug.
+
+ Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
+ Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
+ EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
+ Asm->EOL("Offset Into Abbrev. Section");
+ Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Address Size (in bytes)");
+
+ EmitDIE(Die);
+ // FIXME - extra padding for gdb bug.
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
+ EmitLabel("info_end", Unit->getID());
+
+ Asm->EOL();
}
-}
-/// AddAddress - Add an address attribute to a die based on the location
-/// provided.
-void DwarfWriter::AddAddress(DIE *Die, unsigned Attribute,
- const MachineLocation &Location) {
- DIEBlock *Block = new DIEBlock();
- unsigned Reg = RI->getDwarfRegNum(Location.getRegister());
-
- if (Location.isRegister()) {
- if (Reg < 32) {
- Block->AddUInt(DW_FORM_data1, DW_OP_reg0 + Reg);
- } else {
- Block->AddUInt(DW_FORM_data1, DW_OP_regx);
- Block->AddUInt(DW_FORM_udata, Reg);
- }
- } else {
- if (Reg < 32) {
- Block->AddUInt(DW_FORM_data1, DW_OP_breg0 + Reg);
- } else {
- Block->AddUInt(DW_FORM_data1, DW_OP_bregx);
- Block->AddUInt(DW_FORM_udata, Reg);
+ /// EmitAbbreviations - Emit the abbreviation section.
+ ///
+ void EmitAbbreviations() const {
+ // Check to see if it is worth the effort.
+ if (!Abbreviations.empty()) {
+ // Start the debug abbrev section.
+ Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
+
+ EmitLabel("abbrev_begin", 0);
+
+ // For each abbrevation.
+ for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
+ // Get abbreviation data
+ const DIEAbbrev *Abbrev = Abbreviations[i];
+
+ // Emit the abbrevations code (base 1 index.)
+ Asm->EmitULEB128Bytes(Abbrev->getNumber());
+ Asm->EOL("Abbreviation Code");
+
+ // Emit the abbreviations data.
+ Abbrev->Emit(*this);
+
+ Asm->EOL();
+ }
+
+ // Mark end of abbreviations.
+ Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
+
+ EmitLabel("abbrev_end", 0);
+
+ Asm->EOL();
}
- Block->AddUInt(DW_FORM_sdata, Location.getOffset());
}
- Block->ComputeSize(*this);
- Die->AddBlock(Attribute, 0, Block);
-}
-/// getDieMapSlotFor - Returns the debug information entry map slot for the
-/// specified debug descriptor.
-DIE *&DwarfWriter::getDieMapSlotFor(DebugInfoDesc *DD) {
- return DescToDieMap[DD];
-}
+ /// EmitDebugLines - Emit source line information.
+ ///
+ void EmitDebugLines() {
+ // Minimum line delta, thus ranging from -10..(255-10).
+ const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
+ // Maximum line delta, thus ranging from -10..(255-10).
+ const int MaxLineDelta = 255 + MinLineDelta;
+
+ // Start the dwarf line section.
+ Asm->SwitchToDataSection(TAI->getDwarfLineSection());
+
+ // Construct the section header.
+
+ EmitDifference("line_end", 0, "line_begin", 0, true);
+ Asm->EOL("Length of Source Line Info");
+ EmitLabel("line_begin", 0);
+
+ Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
+
+ EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
+ Asm->EOL("Prolog Length");
+ EmitLabel("line_prolog_begin", 0);
+
+ Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
-/// NewType - Create a new type DIE.
-///
-DIE *DwarfWriter::NewType(DIE *Context, TypeDesc *TyDesc, CompileUnit *Unit) {
- if (!TyDesc) {
- // FIXME - Hack for missing types
- DIE *Die = new DIE(DW_TAG_base_type);
- Die->AddUInt(DW_AT_byte_size, 0, 4);
- Die->AddUInt(DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
- Unit->getDie()->AddChild(Die);
- return Die;
- }
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(TyDesc);
- if (Slot) return Slot;
-
- // Type DIE result.
- DIE *Ty = NULL;
-
- // FIXME - Not sure why programs and variables are coming through here.
- // Short cut for handling subprogram types (not really a TyDesc.)
- if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) {
- Slot = Ty = new DIE(DW_TAG_pointer_type);
- Ty->AddUInt(DW_AT_byte_size, 0, TAI->getAddressSize());
- Ty->AddString(DW_AT_name, DW_FORM_string, SubprogramTy->getName());
- Context->AddChild(Ty);
- return Slot;
- }
- // Short cut for handling global variable types (not really a TyDesc.)
- if (GlobalVariableDesc *GlobalVariableTy =
- dyn_cast<GlobalVariableDesc>(TyDesc)) {
- Slot = Ty = new DIE(DW_TAG_pointer_type);
- Ty->AddUInt(DW_AT_byte_size, 0, TAI->getAddressSize());
- Ty->AddString(DW_AT_name, DW_FORM_string, GlobalVariableTy->getName());
- Context->AddChild(Ty);
- return Slot;
- }
-
- // Get core information.
- const std::string &Name = TyDesc->getName();
- uint64_t Size = TyDesc->getSize() >> 3;
-
- if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
- // Fundamental types like int, float, bool
- Slot = Ty = new DIE(DW_TAG_base_type);
- unsigned Encoding = BasicTy->getEncoding();
- Ty->AddUInt(DW_AT_encoding, DW_FORM_data1, Encoding);
- } else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
- // Create specific DIE.
- Slot = Ty = new DIE(DerivedTy->getTag());
-
- // Map to main type, void will not have a type.
- if (TypeDesc *FromTy = DerivedTy->getFromType()) {
- Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, FromTy, Unit));
+ Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
+
+ Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
+
+ Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
+
+ Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
+
+ // Line number standard opcode encodings argument count
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
+ Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
+ Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
+
+ const UniqueVector<std::string> &Directories = MMI->getDirectories();
+ const UniqueVector<SourceFileInfo>
+ &SourceFiles = MMI->getSourceFiles();
+
+ // Emit directories.
+ for (unsigned DirectoryID = 1, NDID = Directories.size();
+ DirectoryID <= NDID; ++DirectoryID) {
+ Asm->EmitString(Directories[DirectoryID]); Asm->EOL("Directory");
}
- } else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)) {
- // Fetch tag
- unsigned Tag = CompTy->getTag();
-
- // Create specific DIE.
- Slot = Ty = Tag == DW_TAG_vector_type ? new DIE(DW_TAG_array_type) :
- new DIE(Tag);
-
- std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
-
- switch (Tag) {
- case DW_TAG_vector_type: Ty->AddUInt(DW_AT_GNU_vector, DW_FORM_flag, 1);
- // Fall thru
- case DW_TAG_array_type: {
- // Add element type.
- if (TypeDesc *FromTy = CompTy->getFromType()) {
- Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, FromTy, Unit));
- }
+ Asm->EmitInt8(0); Asm->EOL("End of directories");
+
+ // Emit files.
+ for (unsigned SourceID = 1, NSID = SourceFiles.size();
+ SourceID <= NSID; ++SourceID) {
+ const SourceFileInfo &SourceFile = SourceFiles[SourceID];
+ Asm->EmitString(SourceFile.getName());
+ Asm->EOL("Source");
+ Asm->EmitULEB128Bytes(SourceFile.getDirectoryID());
+ Asm->EOL("Directory #");
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("Mod date");
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("File size");
+ }
+ Asm->EmitInt8(0); Asm->EOL("End of files");
+
+ EmitLabel("line_prolog_end", 0);
+
+ // A sequence for each text section.
+ for (unsigned j = 0, M = SectionSourceLines.size(); j < M; ++j) {
+ // Isolate current sections line info.
+ const std::vector<SourceLineInfo> &LineInfos = SectionSourceLines[j];
- // Don't emit size attribute.
- Size = 0;
+ Asm->EOL(std::string("Section ") + SectionMap[j + 1]);
+
+ // Dwarf assumes we start with first line of first source file.
+ unsigned Source = 1;
+ unsigned Line = 1;
- // Construct an anonymous type for index type.
- DIE *IndexTy = new DIE(DW_TAG_base_type);
- IndexTy->AddUInt(DW_AT_byte_size, 0, 4);
- IndexTy->AddUInt(DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
- // Add to context.
- Context->AddChild(IndexTy);
-
- // Add subranges to array type.
- for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
- SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]);
- int64_t Lo = SRD->getLo();
- int64_t Hi = SRD->getHi();
- DIE *Subrange = new DIE(DW_TAG_subrange_type);
+ // Construct rows of the address, source, line, column matrix.
+ for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
+ const SourceLineInfo &LineInfo = LineInfos[i];
+ unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
+ if (!LabelID) continue;
- // If a range is available.
- if (Lo != Hi) {
- Subrange->AddDIEntry(DW_AT_type, DW_FORM_ref4, IndexTy);
- // Only add low if non-zero.
- if (Lo) Subrange->AddSInt(DW_AT_lower_bound, 0, Lo);
- Subrange->AddSInt(DW_AT_upper_bound, 0, Hi);
- }
- Ty->AddChild(Subrange);
- }
-
- break;
- }
- case DW_TAG_structure_type:
- case DW_TAG_union_type: {
- // Add elements to structure type.
- for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
- DebugInfoDesc *Element = Elements[i];
+ unsigned SourceID = LineInfo.getSourceID();
+ const SourceFileInfo &SourceFile = SourceFiles[SourceID];
+ unsigned DirectoryID = SourceFile.getDirectoryID();
+ Asm->EOL(Directories[DirectoryID]
+ + SourceFile.getName()
+ + ":"
+ + utostr_32(LineInfo.getLine()));
+
+ // Define the line address.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
+ EmitReference("label", LabelID); Asm->EOL("Location label");
- if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)) {
- // Add field or base class.
-
- unsigned Tag = MemberDesc->getTag();
+ // If change of source, then switch to the new source.
+ if (Source != LineInfo.getSourceID()) {
+ Source = LineInfo.getSourceID();
+ Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
+ Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
+ }
- // Extract the basic information.
- const std::string &Name = MemberDesc->getName();
- TypeDesc *MemTy = MemberDesc->getFromType();
- uint64_t Size = MemberDesc->getSize();
- uint64_t Align = MemberDesc->getAlign();
- uint64_t Offset = MemberDesc->getOffset();
-
- // Construct member debug information entry.
- DIE *Member = new DIE(Tag);
+ // If change of line.
+ if (Line != LineInfo.getLine()) {
+ // Determine offset.
+ int Offset = LineInfo.getLine() - Line;
+ int Delta = Offset - MinLineDelta;
- // Add name if not "".
- if (!Name.empty())Member->AddString(DW_AT_name, DW_FORM_string, Name);
- // Add location if available.
- AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
+ // Update line.
+ Line = LineInfo.getLine();
- // Most of the time the field info is the same as the members.
- uint64_t FieldSize = Size;
- uint64_t FieldAlign = Align;
- uint64_t FieldOffset = Offset;
-
- if (TypeDesc *FromTy = MemberDesc->getFromType()) {
- Member->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, FromTy, Unit));
- FieldSize = FromTy->getSize();
- FieldAlign = FromTy->getSize();
- }
-
- // Unless we have a bit field.
- if (Tag == DW_TAG_member && FieldSize != Size) {
- // Construct the alignment mask.
- uint64_t AlignMask = ~(FieldAlign - 1);
- // Determine the high bit + 1 of the declared size.
- uint64_t HiMark = (Offset + FieldSize) & AlignMask;
- // Work backwards to determine the base offset of the field.
- FieldOffset = HiMark - FieldSize;
- // Now normalize offset to the field.
- Offset -= FieldOffset;
-
- // Maybe we need to work from the other end.
- if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
-
- // Add size and offset.
- Member->AddUInt(DW_AT_byte_size, 0, FieldSize >> 3);
- Member->AddUInt(DW_AT_bit_size, 0, Size);
- Member->AddUInt(DW_AT_bit_offset, 0, Offset);
- }
-
- // Add computation for offset.
- DIEBlock *Block = new DIEBlock();
- Block->AddUInt(DW_FORM_data1, DW_OP_plus_uconst);
- Block->AddUInt(DW_FORM_udata, FieldOffset >> 3);
- Block->ComputeSize(*this);
- Member->AddBlock(DW_AT_data_member_location, 0, Block);
-
- // Add accessibility (public default unless is base class.
- if (MemberDesc->isProtected()) {
- Member->AddUInt(DW_AT_accessibility, 0, DW_ACCESS_protected);
- } else if (MemberDesc->isPrivate()) {
- Member->AddUInt(DW_AT_accessibility, 0, DW_ACCESS_private);
- } else if (Tag == DW_TAG_inheritance) {
- Member->AddUInt(DW_AT_accessibility, 0, DW_ACCESS_public);
- }
-
- Ty->AddChild(Member);
- } else if (GlobalVariableDesc *StaticDesc =
- dyn_cast<GlobalVariableDesc>(Element)) {
- // Add static member.
-
- // Construct member debug information entry.
- DIE *Static = new DIE(DW_TAG_variable);
-
- // Add name and mangled name.
- const std::string &Name = StaticDesc->getDisplayName();
- const std::string &MangledName = StaticDesc->getName();
- Static->AddString(DW_AT_name, DW_FORM_string, Name);
- Static->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
- MangledName);
-
- // Add location.
- AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine());
-
- // Add type.
- if (TypeDesc *StaticTy = StaticDesc->getType()) {
- Static->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, StaticTy, Unit));
- }
-
- // Add flags.
- Static->AddUInt(DW_AT_external, DW_FORM_flag, 1);
- Static->AddUInt(DW_AT_declaration, DW_FORM_flag, 1);
-
- Ty->AddChild(Static);
- } else if (SubprogramDesc *MethodDesc =
- dyn_cast<SubprogramDesc>(Element)) {
- // Add member function.
-
- // Construct member debug information entry.
- DIE *Method = new DIE(DW_TAG_subprogram);
-
- // Add name and mangled name.
- const std::string &Name = MethodDesc->getDisplayName();
- const std::string &MangledName = MethodDesc->getName();
- bool IsCTor = false;
-
- if (Name.empty()) {
- Method->AddString(DW_AT_name, DW_FORM_string, MangledName);
- IsCTor = TyDesc->getName() == MangledName;
+ // If delta is small enough and in range...
+ if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
+ // ... then use fast opcode.
+ Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
} else {
- Method->AddString(DW_AT_name, DW_FORM_string, Name);
- Method->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
- MangledName);
- }
-
- // Add location.
- AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine());
-
- // Add type.
- if (CompositeTypeDesc *MethodTy =
- dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) {
- // Get argument information.
- std::vector<DebugInfoDesc *> &Args = MethodTy->getElements();
-
- // If not a ctor.
- if (!IsCTor) {
- // Add return type.
- Method->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, dyn_cast<TypeDesc>(Args[0]),
- Unit));
- }
-
- // Add arguments.
- for(unsigned i = 1, N = Args.size(); i < N; ++i) {
- DIE *Arg = new DIE(DW_TAG_formal_parameter);
- Arg->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, cast<TypeDesc>(Args[i]), Unit));
- Arg->AddUInt(DW_AT_artificial, DW_FORM_flag, 1);
- Method->AddChild(Arg);
- }
+ // ... otherwise use long hand.
+ Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
+ Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
+ Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
}
-
- // Add flags.
- Method->AddUInt(DW_AT_external, DW_FORM_flag, 1);
- Method->AddUInt(DW_AT_declaration, DW_FORM_flag, 1);
-
- Ty->AddChild(Method);
- }
- }
- break;
- }
- case DW_TAG_enumeration_type: {
- // Add enumerators to enumeration type.
- for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
- EnumeratorDesc *ED = cast<EnumeratorDesc>(Elements[i]);
- const std::string &Name = ED->getName();
- int64_t Value = ED->getValue();
- DIE *Enumerator = new DIE(DW_TAG_enumerator);
- Enumerator->AddString(DW_AT_name, DW_FORM_string, Name);
- Enumerator->AddSInt(DW_AT_const_value, DW_FORM_sdata, Value);
- Ty->AddChild(Enumerator);
+ } else {
+ // Copy the previous row (different address or source)
+ Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
+ }
}
- break;
- }
- case DW_TAG_subroutine_type: {
- // Add prototype flag.
- Ty->AddUInt(DW_AT_prototyped, DW_FORM_flag, 1);
- // Add return type.
- Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, dyn_cast<TypeDesc>(Elements[0]), Unit));
-
- // Add arguments.
- for(unsigned i = 1, N = Elements.size(); i < N; ++i) {
- DIE *Arg = new DIE(DW_TAG_formal_parameter);
- Arg->AddDIEntry(DW_AT_type, DW_FORM_ref4,
- NewType(Context, cast<TypeDesc>(Elements[i]), Unit));
- Ty->AddChild(Arg);
- }
-
- break;
- }
- default: break;
+ // Define last address of section.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
+ EmitReference("section_end", j + 1); Asm->EOL("Section end label");
+
+ // Mark end of matrix.
+ Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
+ Asm->EmitULEB128Bytes(1); Asm->EOL();
+ Asm->EmitInt8(1); Asm->EOL();
}
+
+ EmitLabel("line_end", 0);
+
+ Asm->EOL();
}
- assert(Ty && "Type not supported yet");
-
- // Add size if non-zero (derived types don't have a size.)
- if (Size) Ty->AddUInt(DW_AT_byte_size, 0, Size);
- // Add name if not anonymous or intermediate type.
- if (!Name.empty()) Ty->AddString(DW_AT_name, DW_FORM_string, Name);
- // Add source line info if available.
- AddSourceLine(Ty, TyDesc->getFile(), TyDesc->getLine());
+ /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
+ ///
+ void EmitCommonDebugFrame() {
+ if (!TAI->doesDwarfRequireFrameSection())
+ return;
- // Add to context owner.
- Context->AddChild(Ty);
-
- return Slot;
-}
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TAI->getAddressSize() : -TAI->getAddressSize();
+
+ // Start the dwarf frame section.
+ Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
+
+ EmitLabel("debug_frame_common", 0);
+ EmitDifference("debug_frame_common_end", 0,
+ "debug_frame_common_begin", 0, true);
+ Asm->EOL("Length of Common Information Entry");
+
+ EmitLabel("debug_frame_common_begin", 0);
+ Asm->EmitInt32((int)DW_CIE_ID);
+ Asm->EOL("CIE Identifier Tag");
+ Asm->EmitInt8(DW_CIE_VERSION);
+ Asm->EOL("CIE Version");
+ Asm->EmitString("");
+ Asm->EOL("CIE Augmentation");
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("CIE Code Alignment Factor");
+ Asm->EmitSLEB128Bytes(stackGrowth);
+ Asm->EOL("CIE Data Alignment Factor");
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
+ Asm->EOL("CIE RA Column");
+
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
-/// NewCompileUnit - Create new compile unit and it's debug information entry.
-///
-CompileUnit *DwarfWriter::NewCompileUnit(CompileUnitDesc *UnitDesc,
- unsigned ID) {
- // Construct debug information entry.
- DIE *Die = new DIE(DW_TAG_compile_unit);
- Die->AddDelta (DW_AT_stmt_list, DW_FORM_data4, DWLabel("line", 0),
- DWLabel("section_line", 0));
-// Die->AddLabel (DW_AT_high_pc, DW_FORM_addr, DWLabel("text_end", 0));
-// Die->AddLabel (DW_AT_low_pc, DW_FORM_addr, DWLabel("text_begin", 0));
- Die->AddString(DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
- Die->AddUInt (DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
- Die->AddString(DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
- Die->AddString(DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
-
- // Add debug information entry to descriptor map.
- DIE *&Slot = getDieMapSlotFor(UnitDesc);
- Slot = Die;
-
- // Construct compile unit.
- CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
-
- // Add Unit to compile unit map.
- DescToUnitMap[UnitDesc] = Unit;
-
- return Unit;
-}
+ EmitFrameMoves(NULL, 0, Moves);
-/// FindCompileUnit - Get the compile unit for the given descriptor.
-///
-CompileUnit *DwarfWriter::FindCompileUnit(CompileUnitDesc *UnitDesc) {
- CompileUnit *Unit = DescToUnitMap[UnitDesc];
- assert(Unit && "Missing compile unit.");
- return Unit;
-}
+ Asm->EmitAlignment(2);
+ EmitLabel("debug_frame_common_end", 0);
+
+ Asm->EOL();
+ }
-/// NewGlobalVariable - Add a new global variable DIE.
-///
-DIE *DwarfWriter::NewGlobalVariable(GlobalVariableDesc *GVD) {
- // Get the compile unit context.
- CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(GVD->getContext());
- CompileUnit *Unit = FindCompileUnit(UnitDesc);
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(GVD);
- if (Slot) return Slot;
-
- // Get the global variable itself.
- GlobalVariable *GV = GVD->getGlobalVariable();
-
- const std::string &Name = GVD->hasMangledName() ? GVD->getDisplayName()
- : GVD->getName();
- const std::string &MangledName = GVD->hasMangledName() ? GVD->getName()
- : "";
- // Get the global's type.
- DIE *Type = NewType(Unit->getDie(), GVD->getType(), Unit);
-
- // Create the globale variable DIE.
- DIE *VariableDie = new DIE(DW_TAG_variable);
- VariableDie->AddString(DW_AT_name, DW_FORM_string, Name);
- if (!MangledName.empty()) {
- VariableDie->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
- MangledName);
- }
- VariableDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
- VariableDie->AddUInt(DW_AT_external, DW_FORM_flag, 1);
-
- // Add source line info if available.
- AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
-
- // Add address.
- DIEBlock *Block = new DIEBlock();
- Block->AddUInt(DW_FORM_data1, DW_OP_addr);
- Block->AddObjectLabel(DW_FORM_udata, MangledName);
- Block->ComputeSize(*this);
- VariableDie->AddBlock(DW_AT_location, 0, Block);
-
- // Add to map.
- Slot = VariableDie;
-
- // Add to context owner.
- Unit->getDie()->AddChild(VariableDie);
-
- // Expose as global.
- // FIXME - need to check external flag.
- Unit->AddGlobal(Name, VariableDie);
-
- return VariableDie;
-}
+ /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
+ /// section.
+ void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
+ if (!TAI->doesDwarfRequireFrameSection())
+ return;
+
+ // Start the dwarf frame section.
+ Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
+
+ EmitDifference("debug_frame_end", DebugFrameInfo.Number,
+ "debug_frame_begin", DebugFrameInfo.Number, true);
+ Asm->EOL("Length of Frame Information Entry");
+
+ EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
-/// NewSubprogram - Add a new subprogram DIE.
-///
-DIE *DwarfWriter::NewSubprogram(SubprogramDesc *SPD) {
- // Get the compile unit context.
- CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(SPD->getContext());
- CompileUnit *Unit = FindCompileUnit(UnitDesc);
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(SPD);
- if (Slot) return Slot;
-
- // Gather the details (simplify add attribute code.)
- const std::string &Name = SPD->hasMangledName() ? SPD->getDisplayName()
- : SPD->getName();
- const std::string &MangledName = SPD->hasMangledName() ? SPD->getName()
- : "";
- DIE *Type = NewType(Unit->getDie(), SPD->getType(), Unit);
- unsigned IsExternal = SPD->isStatic() ? 0 : 1;
-
- DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
- SubprogramDie->AddString(DW_AT_name, DW_FORM_string, Name);
- if (!MangledName.empty()) {
- SubprogramDie->AddString(DW_AT_MIPS_linkage_name, DW_FORM_string,
- MangledName);
- }
- if (Type) {
- SubprogramDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
- }
- SubprogramDie->AddUInt(DW_AT_external, DW_FORM_flag, IsExternal);
- SubprogramDie->AddUInt(DW_AT_prototyped, DW_FORM_flag, 1);
-
- // Add source line info if available.
- AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
-
- // Add to map.
- Slot = SubprogramDie;
-
- // Add to context owner.
- Unit->getDie()->AddChild(SubprogramDie);
-
- // Expose as global.
- Unit->AddGlobal(Name, SubprogramDie);
-
- return SubprogramDie;
-}
+ EmitSectionOffset("debug_frame_common", "section_debug_frame",
+ 0, 0, true, false);
+ Asm->EOL("FDE CIE offset");
-/// NewScopeVariable - Create a new scope variable.
-///
-DIE *DwarfWriter::NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) {
- // Get the descriptor.
- VariableDesc *VD = DV->getDesc();
+ EmitReference("func_begin", DebugFrameInfo.Number);
+ Asm->EOL("FDE initial location");
+ EmitDifference("func_end", DebugFrameInfo.Number,
+ "func_begin", DebugFrameInfo.Number);
+ Asm->EOL("FDE address range");
+
+ EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves);
+
+ Asm->EmitAlignment(2);
+ EmitLabel("debug_frame_end", DebugFrameInfo.Number);
- // Translate tag to proper Dwarf tag. The result variable is dropped for now.
- unsigned Tag;
- switch (VD->getTag()) {
- case DW_TAG_return_variable: return NULL;
- case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
- case DW_TAG_auto_variable: // fall thru
- default: Tag = DW_TAG_variable; break;
+ Asm->EOL();
}
- // Define variable debug information entry.
- DIE *VariableDie = new DIE(Tag);
- VariableDie->AddString(DW_AT_name, DW_FORM_string, VD->getName());
+ /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
+ ///
+ void EmitDebugPubNames() {
+ // Start the dwarf pubnames section.
+ Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
+
+ CompileUnit *Unit = GetBaseCompileUnit();
+
+ EmitDifference("pubnames_end", Unit->getID(),
+ "pubnames_begin", Unit->getID(), true);
+ Asm->EOL("Length of Public Names Info");
+
+ EmitLabel("pubnames_begin", Unit->getID());
+
+ Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
+
+ EmitSectionOffset("info_begin", "section_info",
+ Unit->getID(), 0, true, false);
+ Asm->EOL("Offset of Compilation Unit Info");
- // Add source line info if available.
- AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
-
- // Add variable type.
- DIE *Type = NewType(Unit->getDie(), VD->getType(), Unit);
- VariableDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
+ EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),true);
+ Asm->EOL("Compilation Unit Length");
+
+ std::map<std::string, DIE *> &Globals = Unit->getGlobals();
+
+ for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
+ GE = Globals.end();
+ GI != GE; ++GI) {
+ const std::string &Name = GI->first;
+ DIE * Entity = GI->second;
+
+ Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
+ Asm->EmitString(Name); Asm->EOL("External Name");
+ }
- // Add variable address.
- MachineLocation Location;
- RI->getLocation(*MF, DV->getFrameIndex(), Location);
- AddAddress(VariableDie, DW_AT_location, Location);
+ Asm->EmitInt32(0); Asm->EOL("End Mark");
+ EmitLabel("pubnames_end", Unit->getID());
- return VariableDie;
-}
+ Asm->EOL();
+ }
-/// ConstructScope - Construct the components of a scope.
-///
-void DwarfWriter::ConstructScope(DebugScope *ParentScope,
- DIE *ParentDie, CompileUnit *Unit) {
- // Add variables to scope.
- std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
- for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
- DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
- if (VariableDie) ParentDie->AddChild(VariableDie);
- }
-
- // Add nested scopes.
- std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
- for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
- // Define the Scope debug information entry.
- DebugScope *Scope = Scopes[j];
- // FIXME - Ignore inlined functions for the time being.
- if (!Scope->getParent()) continue;
-
- DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
-
- // Add the scope bounds.
- if (unsigned StartID = Scope->getStartLabelID()) {
- ScopeDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
- DWLabel("loc", StartID));
- } else {
- ScopeDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
- DWLabel("func_begin", SubprogramCount));
- }
- if (unsigned EndID = Scope->getEndLabelID()) {
- ScopeDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
- DWLabel("loc", EndID));
- } else {
- ScopeDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
- DWLabel("func_end", SubprogramCount));
+ /// EmitDebugStr - Emit visible names into a debug str section.
+ ///
+ void EmitDebugStr() {
+ // Check to see if it is worth the effort.
+ if (!StringPool.empty()) {
+ // Start the dwarf str section.
+ Asm->SwitchToDataSection(TAI->getDwarfStrSection());
+
+ // For each of strings in the string pool.
+ for (unsigned StringID = 1, N = StringPool.size();
+ StringID <= N; ++StringID) {
+ // Emit a label for reference from debug information entries.
+ EmitLabel("string", StringID);
+ // Emit the string itself.
+ const std::string &String = StringPool[StringID];
+ Asm->EmitString(String); Asm->EOL();
+ }
+
+ Asm->EOL();
}
-
- // Add the scope contents.
- ConstructScope(Scope, ScopeDie, Unit);
- ParentDie->AddChild(ScopeDie);
}
-}
-/// ConstructRootScope - Construct the scope for the subprogram.
-///
-void DwarfWriter::ConstructRootScope(DebugScope *RootScope) {
- // Exit if there is no root scope.
- if (!RootScope) return;
-
- // Get the subprogram debug information entry.
- SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
-
- // Get the compile unit context.
- CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(SPD->getContext());
- CompileUnit *Unit = FindCompileUnit(UnitDesc);
-
- // Get the subprogram die.
- DIE *SPDie = Unit->getDieMapSlotFor(SPD);
- assert(SPDie && "Missing subprogram descriptor");
-
- // Add the function bounds.
- SPDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
- DWLabel("func_begin", SubprogramCount));
- SPDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
- DWLabel("func_end", SubprogramCount));
- MachineLocation Location(RI->getFrameRegister(*MF));
- AddAddress(SPDie, DW_AT_frame_base, Location);
-
- ConstructScope(RootScope, SPDie, Unit);
-}
+ /// EmitDebugLoc - Emit visible names into a debug loc section.
+ ///
+ void EmitDebugLoc() {
+ // Start the dwarf loc section.
+ Asm->SwitchToDataSection(TAI->getDwarfLocSection());
+
+ Asm->EOL();
+ }
-/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
-/// tools to recognize the object file contains Dwarf information.
-///
-void DwarfWriter::EmitInitial() {
- // Check to see if we already emitted intial headers.
- if (didInitial) return;
- didInitial = true;
-
- // Dwarf sections base addresses.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection(), 0);
- EmitLabel("section_frame", 0);
- Asm->SwitchToDataSection(TAI->getDwarfInfoSection(), 0);
- EmitLabel("section_info", 0);
- EmitLabel("info", 0);
- Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection(), 0);
- EmitLabel("section_abbrev", 0);
- EmitLabel("abbrev", 0);
- Asm->SwitchToDataSection(TAI->getDwarfARangesSection(), 0);
- EmitLabel("section_aranges", 0);
- Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection(), 0);
- EmitLabel("section_macinfo", 0);
- Asm->SwitchToDataSection(TAI->getDwarfLineSection(), 0);
- EmitLabel("section_line", 0);
- EmitLabel("line", 0);
- Asm->SwitchToDataSection(TAI->getDwarfLocSection(), 0);
- EmitLabel("section_loc", 0);
- Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection(), 0);
- EmitLabel("section_pubnames", 0);
- Asm->SwitchToDataSection(TAI->getDwarfStrSection(), 0);
- EmitLabel("section_str", 0);
- Asm->SwitchToDataSection(TAI->getDwarfRangesSection(), 0);
- EmitLabel("section_ranges", 0);
-
- Asm->SwitchToTextSection(TAI->getTextSection(), 0);
- EmitLabel("text_begin", 0);
- Asm->SwitchToDataSection(TAI->getDataSection(), 0);
- EmitLabel("data_begin", 0);
-
- // Emit common frame information.
- EmitInitialDebugFrame();
-}
+ /// EmitDebugARanges - Emit visible names into a debug aranges section.
+ ///
+ void EmitDebugARanges() {
+ // Start the dwarf aranges section.
+ Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
+
+ // FIXME - Mock up
+ #if 0
+ CompileUnit *Unit = GetBaseCompileUnit();
+
+ // Don't include size of length
+ Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
+
+ Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
+
+ EmitReference("info_begin", Unit->getID());
+ Asm->EOL("Offset of Compilation Unit Info");
-/// EmitDIE - Recusively Emits a debug information entry.
-///
-void DwarfWriter::EmitDIE(DIE *Die) const {
- // Get the abbreviation for this DIE.
- unsigned AbbrevID = Die->getAbbrevID();
- const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
-
- O << "\n";
+ Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Size of Address");
- // Emit the code (index) for the abbreviation.
- EmitULEB128Bytes(AbbrevID);
- EOL(std::string("Abbrev [" +
- utostr(AbbrevID) +
- "] 0x" + utohexstr(Die->getOffset()) +
- ":0x" + utohexstr(Die->getSize()) + " " +
- TagString(Abbrev.getTag())));
-
- const std::vector<DIEValue *> &Values = Die->getValues();
- const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
-
- // Emit the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- unsigned Attr = AbbrevData[i].getAttribute();
- unsigned Form = AbbrevData[i].getForm();
- assert(Form && "Too many attributes for DIE (check abbreviation)");
-
- switch (Attr) {
- case DW_AT_sibling: {
- EmitInt32(Die->SiblingOffset());
- break;
- }
- default: {
- // Emit an attribute using the defined form.
- Values[i]->EmitValue(*this, Form);
- break;
+ Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
+
+ Asm->EmitInt16(0); Asm->EOL("Pad (1)");
+ Asm->EmitInt16(0); Asm->EOL("Pad (2)");
+
+ // Range 1
+ EmitReference("text_begin", 0); Asm->EOL("Address");
+ EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
+
+ Asm->EmitInt32(0); Asm->EOL("EOM (1)");
+ Asm->EmitInt32(0); Asm->EOL("EOM (2)");
+
+ Asm->EOL();
+ #endif
+ }
+
+ /// EmitDebugRanges - Emit visible names into a debug ranges section.
+ ///
+ void EmitDebugRanges() {
+ // Start the dwarf ranges section.
+ Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
+
+ Asm->EOL();
+ }
+
+ /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+ ///
+ void EmitDebugMacInfo() {
+ // Start the dwarf macinfo section.
+ Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
+
+ Asm->EOL();
+ }
+
+ /// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
+ /// header file.
+ void ConstructCompileUnitDIEs() {
+ const UniqueVector<CompileUnitDesc *> CUW = MMI->getCompileUnits();
+
+ for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
+ unsigned ID = MMI->RecordSource(CUW[i]);
+ CompileUnit *Unit = NewCompileUnit(CUW[i], ID);
+ CompileUnits.push_back(Unit);
}
+ }
+
+ /// ConstructGlobalDIEs - Create DIEs for each of the externally visible
+ /// global variables.
+ void ConstructGlobalDIEs() {
+ std::vector<GlobalVariableDesc *> GlobalVariables =
+ MMI->getAnchoredDescriptors<GlobalVariableDesc>(*M);
+
+ for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
+ GlobalVariableDesc *GVD = GlobalVariables[i];
+ NewGlobalVariable(GVD);
}
+ }
+
+ /// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
+ /// subprograms.
+ void ConstructSubprogramDIEs() {
+ std::vector<SubprogramDesc *> Subprograms =
+ MMI->getAnchoredDescriptors<SubprogramDesc>(*M);
- EOL(AttributeString(Attr));
+ for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
+ SubprogramDesc *SPD = Subprograms[i];
+ NewSubprogram(SPD);
+ }
}
-
- // Emit the DIE children if any.
- if (Abbrev.getChildrenFlag() == DW_CHILDREN_yes) {
- const std::vector<DIE *> &Children = Die->getChildren();
+
+public:
+ //===--------------------------------------------------------------------===//
+ // Main entry points.
+ //
+ DwarfDebug(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : Dwarf(OS, A, T)
+ , CompileUnits()
+ , AbbreviationsSet(InitAbbreviationsSetSize)
+ , Abbreviations()
+ , ValuesSet(InitValuesSetSize)
+ , Values()
+ , StringPool()
+ , DescToUnitMap()
+ , SectionMap()
+ , SectionSourceLines()
+ , didInitial(false)
+ , shouldEmit(false)
+ {
+ }
+ virtual ~DwarfDebug() {
+ for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i)
+ delete CompileUnits[i];
+ for (unsigned j = 0, M = Values.size(); j < M; ++j)
+ delete Values[j];
+ }
+
+ /// SetModuleInfo - Set machine module information when it's known that pass
+ /// manager has created it. Set by the target AsmPrinter.
+ void SetModuleInfo(MachineModuleInfo *mmi) {
+ // Make sure initial declarations are made.
+ if (!MMI && mmi->hasDebugInfo()) {
+ MMI = mmi;
+ shouldEmit = true;
+
+ // Emit initial sections
+ EmitInitial();
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- EmitDIE(Children[j]);
+ // Create all the compile unit DIEs.
+ ConstructCompileUnitDIEs();
+
+ // Create DIEs for each of the externally visible global variables.
+ ConstructGlobalDIEs();
+
+ // Create DIEs for each of the externally visible subprograms.
+ ConstructSubprogramDIEs();
+
+ // Prime section data.
+ SectionMap.insert(TAI->getTextSection());
}
+ }
+
+ /// BeginModule - Emit all Dwarf sections that should come prior to the
+ /// content.
+ void BeginModule(Module *M) {
+ this->M = M;
- EmitInt8(0); EOL("End Of Children Mark");
+ if (!ShouldEmitDwarf()) return;
}
-}
-/// SizeAndOffsetDie - Compute the size and offset of a DIE.
-///
-unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
- // Get the children.
- const std::vector<DIE *> &Children = Die->getChildren();
-
- // If not last sibling and has children then add sibling offset attribute.
- if (!Last && !Children.empty()) Die->AddSiblingOffset();
+ /// EndModule - Emit all Dwarf sections that should come after the content.
+ ///
+ void EndModule() {
+ if (!ShouldEmitDwarf()) return;
+
+ // Standard sections final addresses.
+ Asm->SwitchToTextSection(TAI->getTextSection());
+ EmitLabel("text_end", 0);
+ Asm->SwitchToDataSection(TAI->getDataSection());
+ EmitLabel("data_end", 0);
+
+ // End text sections.
+ for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
+ Asm->SwitchToTextSection(SectionMap[i].c_str());
+ EmitLabel("section_end", i);
+ }
- // Record the abbreviation.
- Die->Complete(*this);
-
- // Get the abbreviation for this DIE.
- unsigned AbbrevID = Die->getAbbrevID();
- const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
+ // Emit common frame information.
+ EmitCommonDebugFrame();
- // Set DIE offset
- Die->setOffset(Offset);
-
- // Start the size with the size of abbreviation code.
- Offset += SizeULEB128(AbbrevID);
-
- const std::vector<DIEValue *> &Values = Die->getValues();
- const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
+ // Emit function debug frame information
+ for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
+ E = DebugFrames.end(); I != E; ++I)
+ EmitFunctionDebugFrame(*I);
- // Emit the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- // Size attribute value.
- Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
+ // Compute DIE offsets and sizes.
+ SizeAndOffsets();
+
+ // Emit all the DIEs into a debug info section
+ EmitDebugInfo();
+
+ // Corresponding abbreviations into a abbrev section.
+ EmitAbbreviations();
+
+ // Emit source line correspondence into a debug line section.
+ EmitDebugLines();
+
+ // Emit info into a debug pubnames section.
+ EmitDebugPubNames();
+
+ // Emit info into a debug str section.
+ EmitDebugStr();
+
+ // Emit info into a debug loc section.
+ EmitDebugLoc();
+
+ // Emit info into a debug aranges section.
+ EmitDebugARanges();
+
+ // Emit info into a debug ranges section.
+ EmitDebugRanges();
+
+ // Emit info into a debug macinfo section.
+ EmitDebugMacInfo();
+ }
+
+ /// BeginFunction - Gather pre-function debug information. Assumes being
+ /// emitted immediately after the function entry point.
+ void BeginFunction(MachineFunction *MF) {
+ this->MF = MF;
+
+ if (!ShouldEmitDwarf()) return;
+
+ // Begin accumulating function debug information.
+ MMI->BeginFunction(MF);
+
+ // Assumes in correct section after the entry point.
+ EmitLabel("func_begin", ++SubprogramCount);
}
- // Emit the DIE children if any.
- if (!Children.empty()) {
- assert(Abbrev.getChildrenFlag() == DW_CHILDREN_yes &&
- "Children flag not set");
+ /// EndFunction - Gather and emit post-function debug information.
+ ///
+ void EndFunction() {
+ if (!ShouldEmitDwarf()) return;
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
+ // Define end label for subprogram.
+ EmitLabel("func_end", SubprogramCount);
+
+ // Get function line info.
+ const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
+
+ if (!LineInfos.empty()) {
+ // Get section line info.
+ unsigned ID = SectionMap.insert(Asm->CurrentSection);
+ if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
+ std::vector<SourceLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
+ // Append the function info to section info.
+ SectionLineInfos.insert(SectionLineInfos.end(),
+ LineInfos.begin(), LineInfos.end());
}
- // End of children marker.
- Offset += sizeof(int8_t);
- }
+ // Construct scopes for subprogram.
+ ConstructRootScope(MMI->getRootScope());
- Die->setSize(Offset - Die->getOffset());
- return Offset;
-}
+ DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
+ MMI->getFrameMoves()));
+ }
+};
-/// SizeAndOffsets - Compute the size and offset of all the DIEs.
+//===----------------------------------------------------------------------===//
+/// DwarfException - Emits Dwarf exception handling directives.
///
-void DwarfWriter::SizeAndOffsets() {
-
- // Process each compile unit.
- for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
- CompileUnit *Unit = CompileUnits[i];
- if (Unit->hasContent()) {
- // Compute size of compile unit header
- unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t); // Pointer Size (in bytes)
- SizeAndOffsetDie(Unit->getDie(), Offset, (i + 1) == N);
- }
- }
-}
+class DwarfException : public Dwarf {
-/// EmitFrameMoves - Emit frame instructions to describe the layout of the
-/// frame.
-void DwarfWriter::EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
- std::vector<MachineMove *> &Moves) {
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- MachineMove *Move = Moves[i];
- unsigned LabelID = Move->getLabelID();
- const MachineLocation &Dst = Move->getDestination();
- const MachineLocation &Src = Move->getSource();
-
- // Advance row if new location.
- if (BaseLabel && LabelID && BaseLabelID != LabelID) {
- EmitInt8(DW_CFA_advance_loc4);
- EOL("DW_CFA_advance_loc4");
- EmitDifference("loc", LabelID, BaseLabel, BaseLabelID);
- EOL("");
-
- BaseLabelID = LabelID;
- BaseLabel = "loc";
- }
+private:
+ struct FunctionEHFrameInfo {
+ std::string FnName;
+ unsigned Number;
+ unsigned PersonalityIndex;
+ bool hasCalls;
+ bool hasLandingPads;
+ std::vector<MachineMove> Moves;
+
+ FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
+ bool hC, bool hL,
+ const std::vector<MachineMove> &M):
+ FnName(FN), Number(Num), PersonalityIndex(P),
+ hasCalls(hC), hasLandingPads(hL), Moves(M) { };
+ };
+
+ std::vector<FunctionEHFrameInfo> EHFrames;
+ /// shouldEmit - Flag to indicate if debug information should be emitted.
+ ///
+ bool shouldEmit;
+
+ /// EmitCommonEHFrame - Emit the common eh unwind frame.
+ ///
+ void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
+ // Size and sign of stack growth.
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
+ TAI->getAddressSize() : -TAI->getAddressSize();
+
+ // Begin eh frame section.
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
+ O << "EH_frame" << Index << ":\n";
+ EmitLabel("section_eh_frame", Index);
+
+ // Define base labels.
+ EmitLabel("eh_frame_common", Index);
+
+ // Define the eh frame length.
+ EmitDifference("eh_frame_common_end", Index,
+ "eh_frame_common_begin", Index, true);
+ Asm->EOL("Length of Common Information Entry");
+
+ // EH frame header.
+ EmitLabel("eh_frame_common_begin", Index);
+ Asm->EmitInt32((int)0);
+ Asm->EOL("CIE Identifier Tag");
+ Asm->EmitInt8(DW_CIE_VERSION);
+ Asm->EOL("CIE Version");
+
+ // The personality presence indicates that language specific information
+ // will show up in the eh frame.
+ Asm->EmitString(Personality ? "zPLR" : "zR");
+ Asm->EOL("CIE Augmentation");
+
+ // Round out reader.
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("CIE Code Alignment Factor");
+ Asm->EmitSLEB128Bytes(stackGrowth);
+ Asm->EOL("CIE Data Alignment Factor");
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
+ Asm->EOL("CIE RA Column");
+
+ // If there is a personality, we need to indicate the functions location.
+ if (Personality) {
+ Asm->EmitULEB128Bytes(7);
+ Asm->EOL("Augmentation Size");
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+ Asm->EOL("Personality (pcrel sdata4)");
+
+ O << TAI->getData32bitsDirective();
+ Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
+ O << "-" << TAI->getPCSymbol();
+ Asm->EOL("Personality");
+
+ Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
+ Asm->EOL("LSDA Encoding (pcrel)");
+ Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
+ Asm->EOL("FDE Encoding (pcrel)");
+ } else {
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("Augmentation Size");
+ Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
+ Asm->EOL("FDE Encoding (pcrel)");
+ }
+
+ // Indicate locations of general callee saved registers in frame.
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
+ EmitFrameMoves(NULL, 0, Moves);
+
+ Asm->EmitAlignment(2);
+ EmitLabel("eh_frame_common_end", Index);
+
+ Asm->EOL();
+ }
+
+ /// EmitEHFrame - Emit function exception frame information.
+ ///
+ void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
- // If advancing cfa.
- if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
- if (!Src.isRegister()) {
- if (Src.getRegister() == MachineLocation::VirtualFP) {
- EmitInt8(DW_CFA_def_cfa_offset);
- EOL("DW_CFA_def_cfa_offset");
+ // Externally visible entry into the functions eh frame info.
+ if (const char *GlobalDirective = TAI->getGlobalDirective())
+ O << GlobalDirective << EHFrameInfo.FnName << ".eh\n";
+
+ // If there are no calls then you can't unwind.
+ if (!EHFrameInfo.hasCalls) {
+ O << EHFrameInfo.FnName << ".eh = 0\n";
+ } else {
+ O << EHFrameInfo.FnName << ".eh:\n";
+
+ // EH frame header.
+ EmitDifference("eh_frame_end", EHFrameInfo.Number,
+ "eh_frame_begin", EHFrameInfo.Number, true);
+ Asm->EOL("Length of Frame Information Entry");
+
+ EmitLabel("eh_frame_begin", EHFrameInfo.Number);
+
+ EmitSectionOffset("eh_frame_begin", "eh_frame_common",
+ EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
+ true, true);
+ Asm->EOL("FDE CIE offset");
+
+ EmitReference("eh_func_begin", EHFrameInfo.Number, true);
+ Asm->EOL("FDE initial location");
+ EmitDifference("eh_func_end", EHFrameInfo.Number,
+ "eh_func_begin", EHFrameInfo.Number);
+ Asm->EOL("FDE address range");
+
+ // If there is a personality and landing pads then point to the language
+ // specific data area in the exception table.
+ if (EHFrameInfo.PersonalityIndex) {
+ Asm->EmitULEB128Bytes(4);
+ Asm->EOL("Augmentation size");
+
+ if (EHFrameInfo.hasLandingPads) {
+ EmitReference("exception", EHFrameInfo.Number, true);
+ } else if(TAI->getAddressSize() == 8) {
+ Asm->EmitInt64((int)0);
} else {
- EmitInt8(DW_CFA_def_cfa);
- EOL("DW_CFA_def_cfa");
-
- EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister()));
- EOL("Register");
+ Asm->EmitInt32((int)0);
}
-
- int Offset = Src.getOffset() / stackGrowth;
-
- EmitULEB128Bytes(Offset);
- EOL("Offset");
+ Asm->EOL("Language Specific Data Area");
} else {
- assert(0 && "Machine move no supported yet.");
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("Augmentation size");
}
- } else {
- unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
- int Offset = Dst.getOffset() / stackGrowth;
- if (Offset < 0) {
- EmitInt8(DW_CFA_offset_extended_sf);
- EOL("DW_CFA_offset_extended_sf");
- EmitULEB128Bytes(Reg);
- EOL("Reg");
- EmitSLEB128Bytes(Offset);
- EOL("Offset");
- } else if (Reg < 64) {
- EmitInt8(DW_CFA_offset + Reg);
- EOL("DW_CFA_offset + Reg");
- EmitULEB128Bytes(Offset);
- EOL("Offset");
- } else {
- EmitInt8(DW_CFA_offset_extended);
- EOL("DW_CFA_offset_extended");
- EmitULEB128Bytes(Reg);
- EOL("Reg");
- EmitULEB128Bytes(Offset);
- EOL("Offset");
- }
+ // Indicate locations of function specific callee saved registers in
+ // frame.
+ EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves);
+
+ Asm->EmitAlignment(2);
+ EmitLabel("eh_frame_end", EHFrameInfo.Number);
}
+
+ if (const char *UsedDirective = TAI->getUsedDirective())
+ O << UsedDirective << EHFrameInfo.FnName << ".eh\n\n";
}
-}
-/// EmitDebugInfo - Emit the debug info section.
-///
-void DwarfWriter::EmitDebugInfo() const {
- // Start debug info section.
- Asm->SwitchToDataSection(TAI->getDwarfInfoSection(), 0);
-
- // Process each compile unit.
- for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
- CompileUnit *Unit = CompileUnits[i];
-
- if (Unit->hasContent()) {
- DIE *Die = Unit->getDie();
- // Emit the compile units header.
- EmitLabel("info_begin", Unit->getID());
- // Emit size of content not including length itself
- unsigned ContentSize = Die->getSize() +
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t); // Pointer Size (in bytes)
-
- EmitInt32(ContentSize); EOL("Length of Compilation Unit Info");
- EmitInt16(DWARF_VERSION); EOL("DWARF version number");
- EmitDifference("abbrev_begin", 0, "section_abbrev", 0);
- EOL("Offset Into Abbrev. Section");
- EmitInt8(TAI->getAddressSize()); EOL("Address Size (in bytes)");
-
- EmitDIE(Die);
- EmitLabel("info_end", Unit->getID());
- }
-
- O << "\n";
+ /// EquivPads - Whether two landing pads have equivalent actions.
+ static bool EquivPads(const LandingPadInfo *L, const LandingPadInfo *R) {
+ const std::vector<int> &LIds = L->TypeIds;
+ const std::vector<int> &RIds = R->TypeIds;
+ unsigned LSize = LIds.size(), RSize = RIds.size();
+
+ if (LSize != RSize)
+ return false;
+
+ for (unsigned i = 0; i != LSize; ++i)
+ if (LIds[i] != RIds[i])
+ return false;
+
+ return true;
}
-}
-/// EmitAbbreviations - Emit the abbreviation section.
-///
-void DwarfWriter::EmitAbbreviations() const {
- // Check to see if it is worth the effort.
- if (!Abbreviations.empty()) {
- // Start the debug abbrev section.
- Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection(), 0);
-
- EmitLabel("abbrev_begin", 0);
-
- // For each abbrevation.
- for (unsigned AbbrevID = 1, NAID = Abbreviations.size();
- AbbrevID <= NAID; ++AbbrevID) {
- // Get abbreviation data
- const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
-
- // Emit the abbrevations code (base 1 index.)
- EmitULEB128Bytes(AbbrevID); EOL("Abbreviation Code");
-
- // Emit the abbreviations data.
- Abbrev.Emit(*this);
-
- O << "\n";
+ /// PadLT - An order on landing pads, with EquivPads as order equivalence.
+ static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
+ const std::vector<int> &LIds = L->TypeIds;
+ const std::vector<int> &RIds = R->TypeIds;
+ unsigned LSize = LIds.size(), RSize = RIds.size();
+
+ if (LSize != RSize)
+ return LSize < RSize;
+
+ for (unsigned i = 0; i != LSize; ++i)
+ if (LIds[i] != RIds[i])
+ return LIds[i] < RIds[i];
+
+ return false; // Equivalent
+ }
+
+ /// EmitExceptionTable - Emit landpads and actions.
+ ///
+ /// The general organization of the table is complex, but the basic concepts
+ /// are easy. First there is a header which describes the location and
+ /// organization of the three components that follow.
+ /// 1. The landing pad site information describes the range of code covered
+ /// by the try. In our case it's an accumulation of the ranges covered
+ /// by the invokes in the try. There is also a reference to the landing
+ /// pad that handles the exception once processed. Finally an index into
+ /// the actions table.
+ /// 2. The action table, in our case, is composed of pairs of type ids
+ /// and next action offset. Starting with the action index from the
+ /// landing pad site, each type Id is checked for a match to the current
+ /// exception. If it matches then the exception and type id are passed
+ /// on to the landing pad. Otherwise the next action is looked up. This
+ /// chain is terminated with a next action of zero. If no type id is
+ /// found the the frame is unwound and handling continues.
+ /// 3. Type id table contains references to all the C++ typeinfo for all
+ /// catches in the function. This tables is reversed indexed base 1.
+
+ struct KeyInfo {
+ static inline unsigned getEmptyKey() { return -1U; }
+ static inline unsigned getTombstoneKey() { return -2U; }
+ static unsigned getHashValue(const unsigned &Key) { return Key; }
+ static bool isPod() { return true; }
+ };
+
+ struct PadSite {
+ unsigned PadIndex;
+ unsigned SiteIndex;
+ };
+
+ typedef DenseMap<unsigned, PadSite, KeyInfo> PadMapType;
+
+ void EmitExceptionTable() {
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+
+ const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
+ const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
+ const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
+ if (PadInfos.empty()) return;
+
+ // Sort the landing pads in order of their type ids. This is used to fold
+ // duplicate actions.
+ SmallVector<const LandingPadInfo *, 32> LandingPads(PadInfos.size(), NULL);
+ for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
+ LandingPads[i] = &PadInfos[i];
+ std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
+
+ // Gather first action index for each landing pad site.
+ SmallVector<unsigned, 32> Actions;
+
+ // Compute sizes for exception table.
+ unsigned SizeSites = 0;
+ unsigned SizeActions = 0;
+
+ // Look at each landing pad site to compute size. We need the size of each
+ // landing pad site info and the size of the landing pad's actions.
+ signed FirstAction = 0;
+
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LandingPad = LandingPads[i];
+ unsigned SizeSiteActions = 0;
+
+ if (!i || !EquivPads(LandingPad, LandingPads[i-1])) {
+ const std::vector<int> &TypeIds = LandingPad->TypeIds;
+ unsigned SizeAction = 0;
+
+ if (TypeIds.empty()) {
+ FirstAction = 0;
+ } else {
+ // Gather the action sizes
+ for (unsigned j = 0, M = TypeIds.size(); j != M; ++j) {
+ int TypeID = TypeIds[j];
+ unsigned SizeTypeID = Asm->SizeSLEB128(TypeID);
+ signed Action = j ? -(SizeAction + SizeTypeID) : 0;
+ SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
+ SizeSiteActions += SizeAction;
+ }
+
+ // Record the first action of the landing pad site.
+ FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
+ }
+ } // else re-use previous FirstAction
+
+ Actions.push_back(FirstAction);
+
+ // Compute this sites contribution to size.
+ SizeActions += SizeSiteActions;
+ unsigned M = LandingPad->BeginLabels.size();
+ SizeSites += M*(sizeof(int32_t) + // Site start.
+ sizeof(int32_t) + // Site length.
+ sizeof(int32_t) + // Landing pad.
+ Asm->SizeULEB128(FirstAction)); // Action.
}
- EmitLabel("abbrev_end", 0);
-
- O << "\n";
- }
-}
+ // Final tallies.
+ unsigned SizeTypes = TypeInfos.size() * TAI->getAddressSize();
+
+ unsigned TypeOffset = sizeof(int8_t) + // Call site format
+ Asm->SizeULEB128(SizeSites) + // Call-site table length
+ SizeSites + SizeActions + SizeTypes;
+
+ unsigned TotalSize = sizeof(int8_t) + // LPStart format
+ sizeof(int8_t) + // TType format
+ Asm->SizeULEB128(TypeOffset) + // TType base offset
+ TypeOffset;
+
+ unsigned SizeAlign = (4 - TotalSize) & 3;
+
+ // Begin the exception table.
+ Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
+ O << "GCC_except_table" << SubprogramCount << ":\n";
+ Asm->EmitAlignment(2);
+ for (unsigned i = 0; i != SizeAlign; ++i) {
+ Asm->EmitInt8(0);
+ Asm->EOL("Padding");
+ }
+ EmitLabel("exception", SubprogramCount);
+
+ // Emit the header.
+ Asm->EmitInt8(DW_EH_PE_omit);
+ Asm->EOL("LPStart format (DW_EH_PE_omit)");
+ Asm->EmitInt8(DW_EH_PE_absptr);
+ Asm->EOL("TType format (DW_EH_PE_absptr)");
+ Asm->EmitULEB128Bytes(TypeOffset);
+ Asm->EOL("TType base offset");
+ Asm->EmitInt8(DW_EH_PE_udata4);
+ Asm->EOL("Call site format (DW_EH_PE_udata4)");
+ Asm->EmitULEB128Bytes(SizeSites);
+ Asm->EOL("Call-site table length");
+
+ // Emit the landing pad site information in order of address.
+ PadMapType PadMap;
+
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LandingPad = LandingPads[i];
+ for (unsigned j=0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
+ unsigned BeginLabel = LandingPad->BeginLabels[j];
+ assert(!PadMap.count(BeginLabel) && "duplicate landing pad labels!");
+ PadSite P = { i, j };
+ PadMap[BeginLabel] = P;
+ }
+ }
-/// EmitDebugLines - Emit source line information.
-///
-void DwarfWriter::EmitDebugLines() const {
- // Minimum line delta, thus ranging from -10..(255-10).
- const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
- // Maximum line delta, thus ranging from -10..(255-10).
- const int MaxLineDelta = 255 + MinLineDelta;
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ I != E; ++I) {
+ for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
+ MI != E; ++MI) {
+ if (MI->getOpcode() != TargetInstrInfo::LABEL)
+ continue;
- // Start the dwarf line section.
- Asm->SwitchToDataSection(TAI->getDwarfLineSection(), 0);
-
- // Construct the section header.
-
- EmitDifference("line_end", 0, "line_begin", 0);
- EOL("Length of Source Line Info");
- EmitLabel("line_begin", 0);
-
- EmitInt16(DWARF_VERSION); EOL("DWARF version number");
-
- EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0);
- EOL("Prolog Length");
- EmitLabel("line_prolog_begin", 0);
-
- EmitInt8(1); EOL("Minimum Instruction Length");
+ unsigned BeginLabel = MI->getOperand(0).getImmedValue();
+ PadMapType::iterator L = PadMap.find(BeginLabel);
+
+ if (L == PadMap.end())
+ continue;
+
+ PadSite P = L->second;
+ const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
+
+ assert(BeginLabel == LandingPad->BeginLabels[P.SiteIndex] &&
+ "Inconsistent landing pad map!");
+
+ EmitSectionOffset("label", "eh_func_begin", BeginLabel, SubprogramCount,
+ false, true);
+ Asm->EOL("Region start");
+
+ EmitDifference("label", LandingPad->EndLabels[P.SiteIndex],
+ "label", BeginLabel);
+ Asm->EOL("Region length");
+
+ if (LandingPad->TypeIds.empty()) {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ Asm->EmitInt32(0);
+ else
+ Asm->EmitInt64(0);
+ } else {
+ EmitSectionOffset("label", "eh_func_begin",
+ LandingPad->LandingPadLabel, SubprogramCount,
+ false, true);
+ }
+ Asm->EOL("Landing pad");
+
+ Asm->EmitULEB128Bytes(Actions[P.PadIndex]);
+ Asm->EOL("Action");
+ }
+ }
+
+ // Emit the actions.
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ if (!i || Actions[i] != Actions[i-1]) {
+ const LandingPadInfo *LandingPad = LandingPads[i];
+ const std::vector<int> &TypeIds = LandingPad->TypeIds;
+ unsigned SizeAction = 0;
+
+ for (unsigned j = 0, M = TypeIds.size(); j < M; ++j) {
+ int TypeID = TypeIds[j];
+ unsigned SizeTypeID = Asm->SizeSLEB128(TypeID);
+ Asm->EmitSLEB128Bytes(TypeID);
+ Asm->EOL("TypeInfo index");
+ signed Action = j ? -(SizeAction + SizeTypeID) : 0;
+ SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
+ Asm->EmitSLEB128Bytes(Action);
+ Asm->EOL("Next action");
+ }
+ }
+ }
- EmitInt8(1); EOL("Default is_stmt_start flag");
+ // Emit the type ids.
+ for (unsigned M = TypeInfos.size(); M; --M) {
+ GlobalVariable *GV = TypeInfos[M - 1];
+
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ if (GV)
+ O << Asm->getGlobalLinkName(GV);
+ else
+ O << "0";
+
+ Asm->EOL("TypeInfo");
+ }
- EmitInt8(MinLineDelta); EOL("Line Base Value (Special Opcodes)");
-
- EmitInt8(MaxLineDelta); EOL("Line Range Value (Special Opcodes)");
+ // Emit the filter typeids.
+ for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
+ unsigned TypeID = FilterIds[j];
+ Asm->EmitSLEB128Bytes(TypeID);
+ Asm->EOL("Filter TypeInfo index");
+ }
+
+ Asm->EmitAlignment(2);
+ }
- EmitInt8(-MinLineDelta); EOL("Special Opcode Base");
+public:
+ //===--------------------------------------------------------------------===//
+ // Main entry points.
+ //
+ DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : Dwarf(OS, A, T)
+ , shouldEmit(false)
+ {}
- // Line number standard opcode encodings argument count
- EmitInt8(0); EOL("DW_LNS_copy arg count");
- EmitInt8(1); EOL("DW_LNS_advance_pc arg count");
- EmitInt8(1); EOL("DW_LNS_advance_line arg count");
- EmitInt8(1); EOL("DW_LNS_set_file arg count");
- EmitInt8(1); EOL("DW_LNS_set_column arg count");
- EmitInt8(0); EOL("DW_LNS_negate_stmt arg count");
- EmitInt8(0); EOL("DW_LNS_set_basic_block arg count");
- EmitInt8(0); EOL("DW_LNS_const_add_pc arg count");
- EmitInt8(1); EOL("DW_LNS_fixed_advance_pc arg count");
+ virtual ~DwarfException() {}
- const UniqueVector<std::string> &Directories = DebugInfo->getDirectories();
- const UniqueVector<SourceFileInfo> &SourceFiles = DebugInfo->getSourceFiles();
+ /// SetModuleInfo - Set machine module information when it's known that pass
+ /// manager has created it. Set by the target AsmPrinter.
+ void SetModuleInfo(MachineModuleInfo *mmi) {
+ MMI = mmi;
+ }
- // Emit directories.
- for (unsigned DirectoryID = 1, NDID = Directories.size();
- DirectoryID <= NDID; ++DirectoryID) {
- EmitString(Directories[DirectoryID]); EOL("Directory");
+ /// BeginModule - Emit all exception information that should come prior to the
+ /// content.
+ void BeginModule(Module *M) {
+ this->M = M;
}
- EmitInt8(0); EOL("End of directories");
-
- // Emit files.
- for (unsigned SourceID = 1, NSID = SourceFiles.size();
- SourceID <= NSID; ++SourceID) {
- const SourceFileInfo &SourceFile = SourceFiles[SourceID];
- EmitString(SourceFile.getName()); EOL("Source");
- EmitULEB128Bytes(SourceFile.getDirectoryID()); EOL("Directory #");
- EmitULEB128Bytes(0); EOL("Mod date");
- EmitULEB128Bytes(0); EOL("File size");
+
+ /// EndModule - Emit all exception information that should come after the
+ /// content.
+ void EndModule() {
+ if (!shouldEmit) return;
+
+ const std::vector<Function *> Personalities = MMI->getPersonalities();
+ for (unsigned i =0; i < Personalities.size(); ++i)
+ EmitCommonEHFrame(Personalities[i], i);
+
+ for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
+ E = EHFrames.end(); I != E; ++I)
+ EmitEHFrame(*I);
}
- EmitInt8(0); EOL("End of files");
-
- EmitLabel("line_prolog_end", 0);
-
- // A sequence for each text section.
- for (unsigned j = 0, M = SectionSourceLines.size(); j < M; ++j) {
- // Isolate current sections line info.
- const std::vector<SourceLineInfo *> &LineInfos = SectionSourceLines[j];
+
+ /// BeginFunction - Gather pre-function exception information. Assumes being
+ /// emitted immediately after the function entry point.
+ void BeginFunction(MachineFunction *MF) {
+ this->MF = MF;
- if (DwarfVerbose) {
- O << "\t"
- << TAI->getCommentString() << " "
- << "Section "
- << SectionMap[j + 1].c_str() << "\n";
+ if (MMI &&
+ ExceptionHandling &&
+ TAI->doesSupportExceptionHandling()) {
+ shouldEmit = true;
+ // Assumes in correct section after the entry point.
+ EmitLabel("eh_func_begin", ++SubprogramCount);
}
+ }
- // Dwarf assumes we start with first line of first source file.
- unsigned Source = 1;
- unsigned Line = 1;
-
- // Construct rows of the address, source, line, column matrix.
- for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
- SourceLineInfo *LineInfo = LineInfos[i];
-
- if (DwarfVerbose) {
- unsigned SourceID = LineInfo->getSourceID();
- const SourceFileInfo &SourceFile = SourceFiles[SourceID];
- unsigned DirectoryID = SourceFile.getDirectoryID();
- O << "\t"
- << TAI->getCommentString() << " "
- << Directories[DirectoryID]
- << SourceFile.getName() << ":"
- << LineInfo->getLine() << "\n";
- }
+ /// EndFunction - Gather and emit post-function exception information.
+ ///
+ void EndFunction() {
+ if (!shouldEmit) return;
+
+ EmitLabel("eh_func_end", SubprogramCount);
+ EmitExceptionTable();
+
+ // Save EH frame information
+ EHFrames.push_back(FunctionEHFrameInfo(getAsm()->CurrentFnName,
+ SubprogramCount,
+ MMI->getPersonalityIndex(),
+ MF->getFrameInfo()->hasCalls(),
+ !MMI->getLandingPads().empty(),
+ MMI->getFrameMoves()));
+ }
+};
- // Define the line address.
- EmitInt8(0); EOL("Extended Op");
- EmitInt8(4 + 1); EOL("Op size");
- EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
- EmitReference("loc", LineInfo->getLabelID()); EOL("Location label");
-
- // If change of source, then switch to the new source.
- if (Source != LineInfo->getSourceID()) {
- Source = LineInfo->getSourceID();
- EmitInt8(DW_LNS_set_file); EOL("DW_LNS_set_file");
- EmitULEB128Bytes(Source); EOL("New Source");
- }
-
- // If change of line.
- if (Line != LineInfo->getLine()) {
- // Determine offset.
- int Offset = LineInfo->getLine() - Line;
- int Delta = Offset - MinLineDelta;
-
- // Update line.
- Line = LineInfo->getLine();
-
- // If delta is small enough and in range...
- if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
- // ... then use fast opcode.
- EmitInt8(Delta - MinLineDelta); EOL("Line Delta");
- } else {
- // ... otherwise use long hand.
- EmitInt8(DW_LNS_advance_line); EOL("DW_LNS_advance_line");
- EmitSLEB128Bytes(Offset); EOL("Line Offset");
- EmitInt8(DW_LNS_copy); EOL("DW_LNS_copy");
- }
- } else {
- // Copy the previous row (different address or source)
- EmitInt8(DW_LNS_copy); EOL("DW_LNS_copy");
- }
- }
+} // End of namespace llvm
- // Define last address of section.
- EmitInt8(0); EOL("Extended Op");
- EmitInt8(4 + 1); EOL("Op size");
- EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
- EmitReference("section_end", j + 1); EOL("Section end label");
+//===----------------------------------------------------------------------===//
- // Mark end of matrix.
- EmitInt8(0); EOL("DW_LNE_end_sequence");
- EmitULEB128Bytes(1); O << "\n";
- EmitInt8(1); O << "\n";
- }
-
- EmitLabel("line_end", 0);
-
- O << "\n";
-}
-
-/// EmitInitialDebugFrame - Emit common frame info into a debug frame section.
+/// Emit - Print the abbreviation using the specified Dwarf writer.
///
-void DwarfWriter::EmitInitialDebugFrame() {
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
-
- // Start the dwarf frame section.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection(), 0);
-
- EmitLabel("frame_common", 0);
- EmitDifference("frame_common_end", 0,
- "frame_common_begin", 0);
- EOL("Length of Common Information Entry");
-
- EmitLabel("frame_common_begin", 0);
- EmitInt32(DW_CIE_ID); EOL("CIE Identifier Tag");
- EmitInt8(DW_CIE_VERSION); EOL("CIE Version");
- EmitString(""); EOL("CIE Augmentation");
- EmitULEB128Bytes(1); EOL("CIE Code Alignment Factor");
- EmitSLEB128Bytes(stackGrowth); EOL("CIE Data Alignment Factor");
- EmitInt8(RI->getDwarfRegNum(RI->getRARegister())); EOL("CIE RA Column");
-
- std::vector<MachineMove *> Moves;
- RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves);
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) delete Moves[i];
-
- EmitAlign(2);
- EmitLabel("frame_common_end", 0);
+void DIEAbbrev::Emit(const DwarfDebug &DD) const {
+ // Emit its Dwarf tag type.
+ DD.getAsm()->EmitULEB128Bytes(Tag);
+ DD.getAsm()->EOL(TagString(Tag));
- O << "\n";
+ // Emit whether it has children DIEs.
+ DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
+ DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
+
+ // For each attribute description.
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ const DIEAbbrevData &AttrData = Data[i];
+
+ // Emit attribute type.
+ DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
+ DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
+
+ // Emit form type.
+ DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
+ DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
+ }
+
+ // Mark end of abbreviation.
+ DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
+ DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
}
-/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
-/// section.
-void DwarfWriter::EmitFunctionDebugFrame() {
- // Start the dwarf frame section.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection(), 0);
-
- EmitDifference("frame_end", SubprogramCount,
- "frame_begin", SubprogramCount);
- EOL("Length of Frame Information Entry");
-
- EmitLabel("frame_begin", SubprogramCount);
+#ifndef NDEBUG
+void DIEAbbrev::print(std::ostream &O) {
+ O << "Abbreviation @"
+ << std::hex << (intptr_t)this << std::dec
+ << " "
+ << TagString(Tag)
+ << " "
+ << ChildrenString(ChildrenFlag)
+ << "\n";
- EmitDifference("frame_common", 0, "section_frame", 0);
- EOL("FDE CIE offset");
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ O << " "
+ << AttributeString(Data[i].getAttribute())
+ << " "
+ << FormEncodingString(Data[i].getForm())
+ << "\n";
+ }
+}
+void DIEAbbrev::dump() { print(cerr); }
+#endif
- EmitReference("func_begin", SubprogramCount); EOL("FDE initial location");
- EmitDifference("func_end", SubprogramCount,
- "func_begin", SubprogramCount);
- EOL("FDE address range");
-
- std::vector<MachineMove *> &Moves = DebugInfo->getFrameMoves();
-
- EmitFrameMoves("func_begin", SubprogramCount, Moves);
-
- EmitAlign(2);
- EmitLabel("frame_end", SubprogramCount);
+//===----------------------------------------------------------------------===//
- O << "\n";
+#ifndef NDEBUG
+void DIEValue::dump() {
+ print(cerr);
}
+#endif
-/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
-///
-void DwarfWriter::EmitDebugPubNames() {
- // Start the dwarf pubnames section.
- Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection(), 0);
-
- // Process each compile unit.
- for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
- CompileUnit *Unit = CompileUnits[i];
-
- if (Unit->hasContent()) {
- EmitDifference("pubnames_end", Unit->getID(),
- "pubnames_begin", Unit->getID());
- EOL("Length of Public Names Info");
-
- EmitLabel("pubnames_begin", Unit->getID());
-
- EmitInt16(DWARF_VERSION); EOL("DWARF Version");
-
- EmitDifference("info_begin", Unit->getID(), "section_info", 0);
- EOL("Offset of Compilation Unit Info");
+//===----------------------------------------------------------------------===//
- EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID());
- EOL("Compilation Unit Length");
-
- std::map<std::string, DIE *> &Globals = Unit->getGlobals();
-
- for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
- GE = Globals.end();
- GI != GE; ++GI) {
- const std::string &Name = GI->first;
- DIE * Entity = GI->second;
-
- EmitInt32(Entity->getOffset()); EOL("DIE offset");
- EmitString(Name); EOL("External Name");
- }
-
- EmitInt32(0); EOL("End Mark");
- EmitLabel("pubnames_end", Unit->getID());
-
- O << "\n";
- }
+/// EmitValue - Emit integer of appropriate size.
+///
+void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
+ switch (Form) {
+ case DW_FORM_flag: // Fall thru
+ case DW_FORM_ref1: // Fall thru
+ case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
+ case DW_FORM_ref2: // Fall thru
+ case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
+ case DW_FORM_ref4: // Fall thru
+ case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
+ case DW_FORM_ref8: // Fall thru
+ case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
+ case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
+ case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
+ default: assert(0 && "DIE Value form not supported yet"); break;
}
}
-/// EmitDebugStr - Emit visible names into a debug str section.
+/// SizeOf - Determine size of integer value in bytes.
///
-void DwarfWriter::EmitDebugStr() {
- // Check to see if it is worth the effort.
- if (!StringPool.empty()) {
- // Start the dwarf str section.
- Asm->SwitchToDataSection(TAI->getDwarfStrSection(), 0);
-
- // For each of strings in the string pool.
- for (unsigned StringID = 1, N = StringPool.size();
- StringID <= N; ++StringID) {
- // Emit a label for reference from debug information entries.
- EmitLabel("string", StringID);
- // Emit the string itself.
- const std::string &String = StringPool[StringID];
- EmitString(String); O << "\n";
- }
-
- O << "\n";
+unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ switch (Form) {
+ case DW_FORM_flag: // Fall thru
+ case DW_FORM_ref1: // Fall thru
+ case DW_FORM_data1: return sizeof(int8_t);
+ case DW_FORM_ref2: // Fall thru
+ case DW_FORM_data2: return sizeof(int16_t);
+ case DW_FORM_ref4: // Fall thru
+ case DW_FORM_data4: return sizeof(int32_t);
+ case DW_FORM_ref8: // Fall thru
+ case DW_FORM_data8: return sizeof(int64_t);
+ case DW_FORM_udata: return DD.getAsm()->SizeULEB128(Integer);
+ case DW_FORM_sdata: return DD.getAsm()->SizeSLEB128(Integer);
+ default: assert(0 && "DIE Value form not supported yet"); break;
}
+ return 0;
}
-/// EmitDebugLoc - Emit visible names into a debug loc section.
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit string value.
///
-void DwarfWriter::EmitDebugLoc() {
- // Start the dwarf loc section.
- Asm->SwitchToDataSection(TAI->getDwarfLocSection(), 0);
-
- O << "\n";
+void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
+ DD.getAsm()->EmitString(String);
}
-/// EmitDebugARanges - Emit visible names into a debug aranges section.
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit label value.
///
-void DwarfWriter::EmitDebugARanges() {
- // Start the dwarf aranges section.
- Asm->SwitchToDataSection(TAI->getDwarfARangesSection(), 0);
-
- // FIXME - Mock up
-#if 0
- // Process each compile unit.
- for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
- CompileUnit *Unit = CompileUnits[i];
-
- if (Unit->hasContent()) {
- // Don't include size of length
- EmitInt32(0x1c); EOL("Length of Address Ranges Info");
-
- EmitInt16(DWARF_VERSION); EOL("Dwarf Version");
-
- EmitReference("info_begin", Unit->getID());
- EOL("Offset of Compilation Unit Info");
+void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
+ DD.EmitReference(Label);
+}
- EmitInt8(TAI->getAddressSize()); EOL("Size of Address");
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ return DD.getTargetAsmInfo()->getAddressSize();
+}
- EmitInt8(0); EOL("Size of Segment Descriptor");
+//===----------------------------------------------------------------------===//
- EmitInt16(0); EOL("Pad (1)");
- EmitInt16(0); EOL("Pad (2)");
+/// EmitValue - Emit label value.
+///
+void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
+ DD.EmitReference(Label);
+}
- // Range 1
- EmitReference("text_begin", 0); EOL("Address");
- EmitDifference("text_end", 0, "text_begin", 0); EOL("Length");
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ return DD.getTargetAsmInfo()->getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
- EmitInt32(0); EOL("EOM (1)");
- EmitInt32(0); EOL("EOM (2)");
-
- O << "\n";
- }
- }
-#endif
+/// EmitValue - Emit delta value.
+///
+void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
+ bool IsSmall = Form == DW_FORM_data4;
+ DD.EmitDifference(LabelHi, LabelLo, IsSmall);
}
-/// EmitDebugRanges - Emit visible names into a debug ranges section.
+/// SizeOf - Determine size of delta value in bytes.
///
-void DwarfWriter::EmitDebugRanges() {
- // Start the dwarf ranges section.
- Asm->SwitchToDataSection(TAI->getDwarfRangesSection(), 0);
-
- O << "\n";
+unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ if (Form == DW_FORM_data4) return 4;
+ return DD.getTargetAsmInfo()->getAddressSize();
}
-/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit debug information entry offset.
///
-void DwarfWriter::EmitDebugMacInfo() {
- // Start the dwarf macinfo section.
- Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection(), 0);
-
- O << "\n";
+void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
+ DD.getAsm()->EmitInt32(Entry->getOffset());
}
+
+//===----------------------------------------------------------------------===//
-/// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
-/// header file.
-void DwarfWriter::ConstructCompileUnitDIEs() {
- const UniqueVector<CompileUnitDesc *> CUW = DebugInfo->getCompileUnits();
-
- for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
- CompileUnit *Unit = NewCompileUnit(CUW[i], i);
- CompileUnits.push_back(Unit);
+/// ComputeSize - calculate the size of the block.
+///
+unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
+ if (!Size) {
+ const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
+
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
+ }
}
+ return Size;
}
-/// ConstructGlobalDIEs - Create DIEs for each of the externally visible global
-/// variables.
-void DwarfWriter::ConstructGlobalDIEs() {
- std::vector<GlobalVariableDesc *> GlobalVariables =
- DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(*M);
+/// EmitValue - Emit block data.
+///
+void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
+ switch (Form) {
+ case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
+ case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
+ case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
+ case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
+ default: assert(0 && "Improper form for block"); break;
+ }
- for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
- GlobalVariableDesc *GVD = GlobalVariables[i];
- NewGlobalVariable(GVD);
+ const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
+
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ DD.getAsm()->EOL();
+ Values[i]->EmitValue(DD, AbbrevData[i].getForm());
}
}
-/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
-/// subprograms.
-void DwarfWriter::ConstructSubprogramDIEs() {
- std::vector<SubprogramDesc *> Subprograms =
- DebugInfo->getAnchoredDescriptors<SubprogramDesc>(*M);
-
- for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
- SubprogramDesc *SPD = Subprograms[i];
- NewSubprogram(SPD);
+/// SizeOf - Determine size of block data in bytes.
+///
+unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ switch (Form) {
+ case DW_FORM_block1: return Size + sizeof(int8_t);
+ case DW_FORM_block2: return Size + sizeof(int16_t);
+ case DW_FORM_block4: return Size + sizeof(int32_t);
+ case DW_FORM_block: return Size + DD.getAsm()->SizeULEB128(Size);
+ default: assert(0 && "Improper form for block"); break;
}
+ return 0;
}
//===----------------------------------------------------------------------===//
-// Main entry points.
-//
+/// DIE Implementation
+
+DIE::~DIE() {
+ for (unsigned i = 0, N = Children.size(); i < N; ++i)
+ delete Children[i];
+}
-DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A,
- const TargetAsmInfo *T)
-: O(OS)
-, Asm(A)
-, TAI(T)
-, TD(Asm->TM.getTargetData())
-, RI(Asm->TM.getRegisterInfo())
-, M(NULL)
-, MF(NULL)
-, DebugInfo(NULL)
-, didInitial(false)
-, shouldEmit(false)
-, SubprogramCount(0)
-, CompileUnits()
-, Abbreviations()
-, StringPool()
-, DescToUnitMap()
-, DescToDieMap()
-, SectionMap()
-, SectionSourceLines()
-{}
-DwarfWriter::~DwarfWriter() {
- for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
- delete CompileUnits[i];
- }
+/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
+///
+void DIE::AddSiblingOffset() {
+ DIEInteger *DI = new DIEInteger(0);
+ Values.insert(Values.begin(), DI);
+ Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
}
-/// SetDebugInfo - Set DebugInfo when it's known that pass manager has
-/// created it. Set by the target AsmPrinter.
-void DwarfWriter::SetDebugInfo(MachineDebugInfo *DI) {
- // Make sure initial declarations are made.
- if (!DebugInfo && DI->hasInfo()) {
- DebugInfo = DI;
- shouldEmit = true;
-
- // Emit initial sections
- EmitInitial();
+/// Profile - Used to gather unique data for the value folding set.
+///
+void DIE::Profile(FoldingSetNodeID &ID) {
+ Abbrev.Profile(ID);
- // Create all the compile unit DIEs.
- ConstructCompileUnitDIEs();
-
- // Create DIEs for each of the externally visible global variables.
- ConstructGlobalDIEs();
+ for (unsigned i = 0, N = Children.size(); i < N; ++i)
+ ID.AddPointer(Children[i]);
+
+ for (unsigned j = 0, M = Values.size(); j < M; ++j)
+ ID.AddPointer(Values[j]);
+}
- // Create DIEs for each of the externally visible subprograms.
- ConstructSubprogramDIEs();
+#ifndef NDEBUG
+void DIE::print(std::ostream &O, unsigned IncIndent) {
+ static unsigned IndentCount = 0;
+ IndentCount += IncIndent;
+ const std::string Indent(IndentCount, ' ');
+ bool isBlock = Abbrev.getTag() == 0;
+
+ if (!isBlock) {
+ O << Indent
+ << "Die: "
+ << "0x" << std::hex << (intptr_t)this << std::dec
+ << ", Offset: " << Offset
+ << ", Size: " << Size
+ << "\n";
- // Prime section data.
- SectionMap.insert(std::string("\t") + TAI->getTextSection());
+ O << Indent
+ << TagString(Abbrev.getTag())
+ << " "
+ << ChildrenString(Abbrev.getChildrenFlag());
+ } else {
+ O << "Size: " << Size;
}
+ O << "\n";
+
+ const std::vector<DIEAbbrevData> &Data = Abbrev.getData();
+
+ IndentCount += 2;
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ O << Indent;
+ if (!isBlock) {
+ O << AttributeString(Data[i].getAttribute());
+ } else {
+ O << "Blk[" << i << "]";
+ }
+ O << " "
+ << FormEncodingString(Data[i].getForm())
+ << " ";
+ Values[i]->print(O);
+ O << "\n";
+ }
+ IndentCount -= 2;
+
+ for (unsigned j = 0, M = Children.size(); j < M; ++j) {
+ Children[j]->print(O, 4);
+ }
+
+ if (!isBlock) O << "\n";
+ IndentCount -= IncIndent;
}
-/// BeginModule - Emit all Dwarf sections that should come prior to the content.
+void DIE::dump() {
+ print(cerr);
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+/// DwarfWriter Implementation
///
+
+DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A,
+ const TargetAsmInfo *T) {
+ DE = new DwarfException(OS, A, T);
+ DD = new DwarfDebug(OS, A, T);
+}
+
+DwarfWriter::~DwarfWriter() {
+ delete DE;
+ delete DD;
+}
+
+/// SetModuleInfo - Set machine module info when it's known that pass manager
+/// has created it. Set by the target AsmPrinter.
+void DwarfWriter::SetModuleInfo(MachineModuleInfo *MMI) {
+ DD->SetModuleInfo(MMI);
+ DE->SetModuleInfo(MMI);
+}
+
+/// BeginModule - Emit all Dwarf sections that should come prior to the
+/// content.
void DwarfWriter::BeginModule(Module *M) {
- this->M = M;
-
- if (!ShouldEmitDwarf()) return;
- EOL("Dwarf Begin Module");
+ DE->BeginModule(M);
+ DD->BeginModule(M);
}
/// EndModule - Emit all Dwarf sections that should come after the content.
///
void DwarfWriter::EndModule() {
- if (!ShouldEmitDwarf()) return;
- EOL("Dwarf End Module");
-
- // Standard sections final addresses.
- Asm->SwitchToTextSection(TAI->getTextSection(), 0);
- EmitLabel("text_end", 0);
- Asm->SwitchToDataSection(TAI->getDataSection(), 0);
- EmitLabel("data_end", 0);
-
- // End text sections.
- for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
- Asm->SwitchToTextSection(SectionMap[i].c_str(), 0);
- EmitLabel("section_end", i);
- }
-
- // Compute DIE offsets and sizes.
- SizeAndOffsets();
-
- // Emit all the DIEs into a debug info section
- EmitDebugInfo();
-
- // Corresponding abbreviations into a abbrev section.
- EmitAbbreviations();
-
- // Emit source line correspondence into a debug line section.
- EmitDebugLines();
-
- // Emit info into a debug pubnames section.
- EmitDebugPubNames();
-
- // Emit info into a debug str section.
- EmitDebugStr();
-
- // Emit info into a debug loc section.
- EmitDebugLoc();
-
- // Emit info into a debug aranges section.
- EmitDebugARanges();
-
- // Emit info into a debug ranges section.
- EmitDebugRanges();
-
- // Emit info into a debug macinfo section.
- EmitDebugMacInfo();
+ DE->EndModule();
+ DD->EndModule();
}
/// BeginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
void DwarfWriter::BeginFunction(MachineFunction *MF) {
- this->MF = MF;
-
- if (!ShouldEmitDwarf()) return;
- EOL("Dwarf Begin Function");
-
- // Begin accumulating function debug information.
- DebugInfo->BeginFunction(MF);
-
- // Assumes in correct section after the entry point.
- EmitLabel("func_begin", ++SubprogramCount);
+ DE->BeginFunction(MF);
+ DD->BeginFunction(MF);
}
/// EndFunction - Gather and emit post-function debug information.
///
void DwarfWriter::EndFunction() {
- if (!ShouldEmitDwarf()) return;
- EOL("Dwarf End Function");
+ DD->EndFunction();
+ DE->EndFunction();
- // Define end label for subprogram.
- EmitLabel("func_end", SubprogramCount);
-
- // Get function line info.
- std::vector<SourceLineInfo *> &LineInfos = DebugInfo->getSourceLines();
-
- if (!LineInfos.empty()) {
- // Get section line info.
- unsigned ID = SectionMap.insert(Asm->CurrentSection);
- if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
- std::vector<SourceLineInfo *> &SectionLineInfos =SectionSourceLines[ID-1];
- // Append the function info to section info.
- SectionLineInfos.insert(SectionLineInfos.end(),
- LineInfos.begin(), LineInfos.end());
+ if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI()) {
+ // Clear function debug information.
+ MMI->EndFunction();
}
-
- // Construct scopes for subprogram.
- ConstructRootScope(DebugInfo->getRootScope());
-
- // Emit function frame information.
- EmitFunctionDebugFrame();
-
- // Reset the line numbers for the next function.
- LineInfos.clear();
-
- // Clear function debug information.
- DebugInfo->EndFunction();
}
projects / oota-llvm.git / blobdiff