#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Module.h"
+#include "llvm/Type.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineDebugInfo.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Support/Dwarf.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Target/MRegisterInfo.h"
+#include "llvm/Target/TargetMachine.h"
#include <iostream>
using namespace llvm;
+using namespace llvm::dwarf;
static cl::opt<bool>
DwarfVerbose("dwarf-verbose", cl::Hidden,
- cl::desc("Add comments to dwarf directives."));
+ cl::desc("Add comments to Dwarf directives."));
-/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
-/// unsigned leb128 value. Comment is added to the end of the directive if
-/// DwarfVerbose is true (should not contain any newlines.)
+namespace llvm {
+
+//===----------------------------------------------------------------------===//
+// Forward declarations.
+//
+class DIE;
+
+//===----------------------------------------------------------------------===//
+// 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.
+
+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.
+ ///
+ bool hasContent() const;
+
+ /// AddGlobal - Add a new global entity to the compile unit.
+ ///
+ void AddGlobal(const std::string &Name, DIE *Die);
+
+ /// getDieMapSlotFor - Returns the debug information entry map slot for the
+ /// specified debug descriptor.
+ DIE *&getDieMapSlotFor(DebugInfoDesc *DD) {
+ return DescToDieMap[DD];
+ }
+};
+
+//===----------------------------------------------------------------------===//
+// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
+// Dwarf abbreviation.
+class DIEAbbrevData {
+private:
+ unsigned Attribute; // Dwarf attribute code.
+ unsigned Form; // Dwarf form code.
+
+public:
+ DIEAbbrevData(unsigned A, unsigned F)
+ : Attribute(A)
+ , Form(F)
+ {}
+
+ // Accessors.
+ unsigned getAttribute() const { return Attribute; }
+ unsigned getForm() const { return Form; }
+
+ /// 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.
+ ///
+ bool operator<(const DIEAbbrevData &DAD) const {
+ return Attribute < DAD.Attribute ||
+ (Attribute == DAD.Attribute && Form < DAD.Form);
+ }
+};
+
+//===----------------------------------------------------------------------===//
+// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
+// information object.
+class DIEAbbrev {
+private:
+ unsigned Tag; // Dwarf tag code.
+ unsigned ChildrenFlag; // Dwarf children flag.
+ std::vector<DIEAbbrevData> Data; // Raw data bytes for abbreviation.
+
+public:
+
+ DIEAbbrev(unsigned T, unsigned C)
+ : Tag(T)
+ , ChildrenFlag(C)
+ , Data()
+ {}
+ ~DIEAbbrev() {}
+
+ // Accessors.
+ unsigned getTag() const { return Tag; }
+ unsigned getChildrenFlag() const { return ChildrenFlag; }
+ const std::vector<DIEAbbrevData> &getData() const { return Data; }
+ 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;
+
+ /// AddAttribute - Adds another set of attribute information to the
+ /// abbreviation.
+ void AddAttribute(unsigned Attribute, unsigned Form) {
+ Data.push_back(DIEAbbrevData(Attribute, Form));
+ }
+
+ /// AddFirstAttribute - Adds a set of attribute information to the front
+ /// of the abbreviation.
+ void AddFirstAttribute(unsigned Attribute, unsigned Form) {
+ Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
+ }
+
+ /// Emit - Print the abbreviation using the specified Dwarf writer.
+ ///
+ void Emit(const DwarfWriter &DW) const;
+
+#ifndef NDEBUG
+ void print(std::ostream &O);
+ void dump();
+#endif
+};
+
+//===----------------------------------------------------------------------===//
+// DIEValue - A debug information entry value.
+//
+class DIEValue {
+public:
+ enum {
+ isInteger,
+ isString,
+ isLabel,
+ isAsIsLabel,
+ isDelta,
+ isEntry,
+ isBlock
+ };
+
+ unsigned Type; // Type of the value
+
+ DIEValue(unsigned T) : Type(T) {}
+ virtual ~DIEValue() {}
+
+ // 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;
+
+ /// SizeOf - Return the size of a value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const = 0;
+};
+
+//===----------------------------------------------------------------------===//
+// DWInteger - An integer value DIE.
+//
+class DIEInteger : public DIEValue {
+private:
+ uint64_t Integer;
+
+public:
+ DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEInteger *) { return true; }
+ static bool classof(const DIEValue *I) { return I->Type == isInteger; }
+
+ /// BestForm - Choose the best form for integer.
+ ///
+ unsigned BestForm(bool IsSigned);
+
+ /// EmitValue - Emit integer of appropriate size.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of integer value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+};
+
+//===----------------------------------------------------------------------===//
+// DIEString - A string value DIE.
+//
+struct DIEString : public DIEValue {
+ const std::string String;
+
+ DIEString(const std::string &S) : DIEValue(isString), String(S) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEString *) { return true; }
+ static bool classof(const DIEValue *S) { return S->Type == isString; }
+
+ /// EmitValue - Emit string value.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of string value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+};
+
+//===----------------------------------------------------------------------===//
+// DIEDwarfLabel - A Dwarf internal label expression DIE.
+//
+struct DIEDwarfLabel : public DIEValue {
+ const DWLabel Label;
+
+ DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEDwarfLabel *) { return true; }
+ static bool classof(const DIEValue *L) { return L->Type == isLabel; }
+
+ /// EmitValue - Emit label value.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of label value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+};
+
+
+//===----------------------------------------------------------------------===//
+// DIEObjectLabel - A label to an object in code or data.
+//
+struct DIEObjectLabel : public DIEValue {
+ const std::string Label;
+
+ DIEObjectLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEObjectLabel *) { return true; }
+ static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
+
+ /// EmitValue - Emit label value.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of label value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+};
+
+//===----------------------------------------------------------------------===//
+// DIEDelta - A simple label difference DIE.
+//
+struct DIEDelta : public DIEValue {
+ const DWLabel LabelHi;
+ const DWLabel LabelLo;
+
+ DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
+ : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEDelta *) { return true; }
+ static bool classof(const DIEValue *D) { return D->Type == isDelta; }
+
+ /// EmitValue - Emit delta value.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of delta value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+};
+
+//===----------------------------------------------------------------------===//
+// DIEntry - A pointer to a debug information entry.
+//
+struct DIEntry : public DIEValue {
+ DIE *Entry;
+
+ DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIEntry *) { return true; }
+ static bool classof(const DIEValue *E) { return E->Type == isEntry; }
+
+ /// EmitValue - Emit debug information entry offset.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of debug information entry in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+};
+
+//===----------------------------------------------------------------------===//
+// DIEBlock - A block of values. Primarily used for location expressions.
+//
+struct DIEBlock : public DIEValue {
+ unsigned Size; // Size in bytes excluding size header.
+ std::vector<unsigned> Forms; // Data forms.
+ std::vector<DIEValue *> Values; // Block values.
+
+ DIEBlock()
+ : DIEValue(isBlock)
+ , Size(0)
+ , Forms()
+ , Values()
+ {}
+ ~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);
+
+ /// BestForm - Choose the best form for data.
+ ///
+ unsigned BestForm();
+
+ /// EmitValue - Emit block data.
+ ///
+ virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
+
+ /// SizeOf - Determine size of block data in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
+
+ /// AddUInt - Add an unsigned integer value.
+ ///
+ void AddUInt(unsigned Form, uint64_t Integer);
+
+ /// AddSInt - Add an signed integer value.
+ ///
+ void AddSInt(unsigned Form, int64_t Integer);
+
+ /// AddString - Add a std::string value.
+ ///
+ void AddString(unsigned Form, const std::string &String);
+
+ /// AddLabel - Add a Dwarf label value.
+ ///
+ void AddLabel(unsigned Form, const DWLabel &Label);
+
+ /// AddObjectLabel - Add a non-Dwarf label value.
+ ///
+ void AddObjectLabel(unsigned Form, const std::string &Label);
+
+ /// AddDelta - Add a label delta value.
+ ///
+ void AddDelta(unsigned Form, const DWLabel &Hi, const DWLabel &Lo);
+
+ /// AddDIEntry - Add a DIE value.
+ ///
+ 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.
+
+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; }
+
+ /// 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();
+
+ /// AddUInt - Add an unsigned integer attribute data and value.
+ ///
+ void AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer);
+
+ /// 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.
+ ///
+ 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);
+
+ /// AddChild - Add a child to the DIE.
+ void AddChild(DIE *Child);
+};
+
+} // End of namespace llvm
+
+//===----------------------------------------------------------------------===//
+
+CompileUnit::~CompileUnit() {
+ delete Die;
+}
+
+/// hasContent - Return true if this compile unit has something to write out.
+///
+bool CompileUnit::hasContent() const {
+ return !Die->getChildren().empty();
+}
+
+/// AddGlobal - Add a new global entity to the compile unit.
+///
+void CompileUnit::AddGlobal(const std::string &Name, DIE *Die) {
+ Globals[Name] = Die;
+}
+
+//===----------------------------------------------------------------------===//
+
+/// 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;
+
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ if (Data[i] != DA.Data[i]) return false;
+ }
+
+ 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();
+
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ if (Data[i] != DA.Data[i]) return Data[i] < DA.Data[i];
+ }
+
+ 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));
+
+ // Emit whether it has children DIEs.
+ DW.EmitULEB128Bytes(ChildrenFlag);
+ DW.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.
+ DW.EmitULEB128Bytes(AttrData.getAttribute());
+ DW.EOL(AttributeString(AttrData.getAttribute()));
+
+ // Emit form type.
+ DW.EmitULEB128Bytes(AttrData.getForm());
+ DW.EOL(FormEncodingString(AttrData.getForm()));
+ }
+
+ // Mark end of abbreviation.
+ DW.EmitULEB128Bytes(0); DW.EOL("EOM(1)");
+ DW.EmitULEB128Bytes(0); DW.EOL("EOM(2)");
+}
+
+#ifndef NDEBUG
+ void DIEAbbrev::print(std::ostream &O) {
+ O << "Abbreviation @"
+ << std::hex << (intptr_t)this << std::dec
+ << " "
+ << TagString(Tag)
+ << " "
+ << ChildrenString(ChildrenFlag)
+ << "\n";
+
+ for (unsigned i = 0, N = Data.size(); i < N; ++i) {
+ O << " "
+ << AttributeString(Data[i].getAttribute())
+ << " "
+ << FormEncodingString(Data[i].getForm())
+ << "\n";
+ }
+ }
+ 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;
+ }
+ return DW_FORM_data8;
+}
+
+/// 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;
+ }
+}
+
+/// 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;
+ }
+ return 0;
+}
+
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit string value.
+///
+void DIEString::EmitValue(const DwarfWriter &DW, unsigned Form) const {
+ DW.EmitString(String);
+}
+
+/// SizeOf - Determine size of string value in bytes.
+///
+unsigned DIEString::SizeOf(const DwarfWriter &DW, unsigned Form) const {
+ return String.size() + sizeof(char); // sizeof('\0');
+}
+
+//===----------------------------------------------------------------------===//
+
+/// 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.getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit label value.
+///
+void DIEObjectLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
+ DW.EmitReference(Label);
+}
+
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEObjectLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
+ return DW.getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit delta value.
+///
+void DIEDelta::EmitValue(const DwarfWriter &DW, unsigned Form) const {
+ DW.EmitDifference(LabelHi, LabelLo);
+}
+
+/// SizeOf - Determine size of delta value in bytes.
+///
+unsigned DIEDelta::SizeOf(const DwarfWriter &DW, unsigned Form) const {
+ return DW.getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
+/// EmitValue - Emit debug information entry offset.
+///
+void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
+ DW.EmitInt32(Entry->getOffset());
+}
+
+/// SizeOf - Determine size of debug information entry value in bytes.
+///
+unsigned DIEntry::SizeOf(const DwarfWriter &DW, unsigned Form) const {
+ return sizeof(int32_t);
+}
+
+//===----------------------------------------------------------------------===//
+
+DIEBlock::~DIEBlock() {
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ delete Values[i];
+ }
+}
+
+/// 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]);
+ }
+ 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;
+}
+
+/// EmitValue - Emit block data.
///
-void DwarfWriter::EmitULEB128Bytes(unsigned Value, const char *Comment) const {
+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;
+ }
+ for (unsigned i = 0, N = Values.size(); i < N; ++i) {
+ DW.EOL("");
+ Values[i]->EmitValue(DW, Forms[i]);
+ }
+}
+
+/// 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;
+ }
+ 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);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// AddLabel - Add a Dwarf label value.
+///
+void DIEBlock::AddLabel(unsigned Form, const DWLabel &Label) {
+ Values.push_back(new DIEDwarfLabel(Label));
+ Forms.push_back(Form);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// 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()
+{}
+
+DIE::~DIE() {
+ if (Abbrev) delete Abbrev;
+
+ for (unsigned i = 0, N = Children.size(); i < N; ++i) {
+ delete Children[i];
+ }
+
+ for (unsigned j = 0, M = Values.size(); j < M; ++j) {
+ delete Values[j];
+ }
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+/// 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);
+}
+
+//===----------------------------------------------------------------------===//
+
+/// DWContext
+
+//===----------------------------------------------------------------------===//
+
+/// PrintHex - Print a value as a hexidecimal value.
+///
+void DwarfWriter::PrintHex(int Value) const {
+ O << "0x" << std::hex << Value << std::dec;
+}
+
+/// 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"
+ << Asm->CommentString
+ << " "
+ << Comment;
+ }
+ O << "\n";
+}
+
+/// EmitAlign - Print a align directive.
+///
+void DwarfWriter::EmitAlign(unsigned Alignment) const {
+ O << Asm->AlignDirective << Alignment << "\n";
+}
+
+/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
+/// unsigned leb128 value.
+void DwarfWriter::EmitULEB128Bytes(unsigned Value) const {
if (hasLEB128) {
O << "\t.uleb128\t"
<< Value;
} else {
- O << Asm->Data8bitsDirective;
- EmitULEB128(Value);
- }
- if (DwarfVerbose) {
- O << "\t"
- << Asm->CommentString
- << " "
- << Comment
- << " "
- << Value;
+ O << Asm->Data8bitsDirective;
+ PrintULEB128(Value);
+ }
+}
+
+/// EmitSLEB128Bytes - Emit an assembler byte data directive to compose a
+/// signed leb128 value.
+void DwarfWriter::EmitSLEB128Bytes(int Value) const {
+ if (hasLEB128) {
+ O << "\t.sleb128\t"
+ << Value;
+ } else {
+ O << Asm->Data8bitsDirective;
+ PrintSLEB128(Value);
+ }
+}
+
+/// 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 << Asm->Data8bitsDirective;
+ PrintHex(Value & 0xFF);
+}
+
+/// EmitInt16 - Emit a short directive and value.
+///
+void DwarfWriter::EmitInt16(int Value) const {
+ O << Asm->Data16bitsDirective;
+ PrintHex(Value & 0xFFFF);
+}
+
+/// EmitInt32 - Emit a long directive and value.
+///
+void DwarfWriter::EmitInt32(int Value) const {
+ O << Asm->Data32bitsDirective;
+ PrintHex(Value);
+}
+
+/// EmitInt64 - Emit a long long directive and value.
+///
+void DwarfWriter::EmitInt64(uint64_t Value) const {
+ if (Asm->Data64bitsDirective) {
+ O << Asm->Data64bitsDirective << "0x" << std::hex << Value << std::dec;
+ } else {
+ const TargetData &TD = Asm->TM.getTargetData();
+
+ if (TD.isBigEndian()) {
+ EmitInt32(unsigned(Value >> 32)); O << "\n";
+ EmitInt32(unsigned(Value));
+ } else {
+ EmitInt32(unsigned(Value)); O << "\n";
+ EmitInt32(unsigned(Value >> 32));
+ }
+ }
+}
+
+/// 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 << Asm->AsciiDirective
+ << "\"";
+ 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));
+ O << char('0' + (C >> 3));
+ O << char('0' + (C >> 0));
+ break;
+ }
+ } else if (C == '\"') {
+ O << "\\\"";
+ } else if (C == '\'') {
+ O << "\\\'";
+ } else {
+ O << C;
+ }
+ }
+ O << "\\0\"";
+}
+
+/// PrintLabelName - Print label name in form used by Dwarf writer.
+///
+void DwarfWriter::PrintLabelName(const char *Tag, unsigned Number) const {
+ O << Asm->PrivateGlobalPrefix
+ << "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 (AddressSize == 4)
+ O << Asm->Data32bitsDirective;
+ else
+ O << Asm->Data64bitsDirective;
+
+ PrintLabelName(Tag, Number);
+}
+void DwarfWriter::EmitReference(const std::string &Name) const {
+ if (AddressSize == 4)
+ O << Asm->Data32bitsDirective;
+ else
+ O << Asm->Data64bitsDirective;
+
+ O << Name;
+}
+
+/// 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 (needsSet) {
+ static unsigned SetCounter = 0;
+
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter);
+ O << ",";
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
+ O << "\n";
+
+ if (AddressSize == sizeof(int32_t))
+ O << Asm->Data32bitsDirective;
+ else
+ O << Asm->Data64bitsDirective;
+
+ PrintLabelName("set", SetCounter);
+
+ ++SetCounter;
+ } else {
+ if (AddressSize == sizeof(int32_t))
+ O << Asm->Data32bitsDirective;
+ else
+ O << Asm->Data64bitsDirective;
+
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
}
- O << "\n";
}
-/// EmitSLEB128Bytes - Emit an assembler byte data directive to compose a
-/// signed leb128 value. Comment is added to the end of the directive if
-/// DwarfVerbose is true (should not contain any newlines.)
+/// NewAbbreviation - Add the abbreviation to the Abbreviation vector.
+///
+unsigned DwarfWriter::NewAbbreviation(DIEAbbrev *Abbrev) {
+ return Abbreviations.insert(*Abbrev);
+}
+
+/// NewString - Add a string to the constant pool and returns a label.
///
-void DwarfWriter::EmitSLEB128Bytes(int Value, const char *Comment) const {
- if (hasLEB128) {
- O << "\t.sleb128\t"
- << Value;
+DWLabel DwarfWriter::NewString(const std::string &String) {
+ unsigned StringID = StringPool.insert(String);
+ return DWLabel("string", StringID);
+}
+
+/// 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);
+ }
+}
+
+/// AddAddress - Add an address attribute to a die based on the location
+/// provided.
+void DwarfWriter::AddAddress(DIE *Die, unsigned Attribute,
+ MachineLocation &Location) {
+ DIEBlock *Block = new DIEBlock();
+ if (Location.isRegister()) {
+ Block->AddUInt(DW_FORM_data1, DW_OP_reg0 + Location.getRegister());
} else {
- O << Asm->Data8bitsDirective;
- EmitSLEB128(Value);
+ Block->AddUInt(DW_FORM_data1, DW_OP_breg0 + Location.getRegister());
+ Block->AddUInt(DW_FORM_sdata, Location.getOffset());
}
- if (DwarfVerbose) {
- O << "\t"
- << Asm->CommentString
- << " "
- << Comment
- << " "
- << Value;
+ 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];
+}
+
+/// 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;
}
- O << "\n";
+
+ // FIXME - Should handle other contexts that compile units.
+
+ // Check for pre-existence.
+ DIE *&Slot = Unit->getDieMapSlotFor(TyDesc);
+ if (Slot) return Slot;
+
+ // Get core information.
+ const std::string &Name = TyDesc->getName();
+ uint64_t Size = TyDesc->getSize() >> 3;
+
+ DIE *Ty = NULL;
+
+ 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));
+ }
+ } else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)) {
+ // Create specific DIE.
+ Slot = Ty = new DIE(CompTy->getTag());
+ std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
+
+ switch (CompTy->getTag()) {
+ 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));
+ }
+ // Don't emit size attribute.
+ Size = 0;
+
+ // 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);
+
+ // 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: {
+ // FIXME - this is just the basics.
+ // Add elements to structure type.
+ for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
+ DerivedTypeDesc *MemberDesc = cast<DerivedTypeDesc>(Elements[i]);
+
+ // 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(DW_TAG_member);
+
+ // 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());
+
+ // 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 (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.
+ const TargetData &TD = Asm->TM.getTargetData();
+ if (TD.isLittleEndian()) Offset = FieldSize - (Offset + Size);
+
+ 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);
+
+ Ty->AddChild(Member);
+ }
+ 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);
+ }
+
+ break;
+ }
+ default: break;
+ }
+ }
+
+ 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());
+
+ // Add to context owner.
+ Context->AddChild(Ty);
+
+ return Slot;
}
-/// EmitHex - Emit a hexidecimal string to the output stream.
+/// NewCompileUnit - Create new compile unit and it's debug information entry.
///
-void DwarfWriter::EmitHex(unsigned Value) const {
- O << "0x"
- << std::hex
- << Value
- << std::dec;
+CompileUnit *DwarfWriter::NewCompileUnit(CompileUnitDesc *UnitDesc,
+ unsigned ID) {
+ // Construct debug information entry.
+ DIE *Die = new DIE(DW_TAG_compile_unit);
+ Die->AddLabel (DW_AT_stmt_list, DW_FORM_data4, DWLabel("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;
}
-/// EmitComment - Emit a simple string comment.
+/// FindCompileUnit - Get the compile unit for the given descriptor.
///
-void DwarfWriter::EmitComment(const char *Comment) const {
- O << "\t"
- << Asm->CommentString
- << " "
- << Comment
- << "\n";
+CompileUnit *DwarfWriter::FindCompileUnit(CompileUnitDesc *UnitDesc) {
+ CompileUnit *Unit = DescToUnitMap[UnitDesc];
+ assert(Unit && "Missing compile unit.");
+ return Unit;
}
-/// EmitULEB128 - Emit a series of hexidecimal values (separated by commas)
-/// representing an unsigned leb128 value.
+/// NewGlobalVariable - Add a new global variable DIE.
///
-void DwarfWriter::EmitULEB128(unsigned Value) const {
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- if (Value) Byte |= 0x80;
- EmitHex(Byte);
- if (Value) O << ", ";
- } while (Value);
+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();
+ // Generate the mangled name.
+ std::string MangledName = Asm->Mang->getValueName(GV);
+
+ // Gather the details (simplify add attribute code.)
+ const std::string &Name = 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);
+ 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;
}
-/// EmitSLEB128 - Emit a series of hexidecimal values (separated by commas)
-/// representing a signed leb128 value.
+/// NewSubprogram - Add a new subprogram DIE.
///
-void DwarfWriter::EmitSLEB128(int Value) const {
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
+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;
- do {
- unsigned Byte = Value & 0x7f;
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- if (IsMore) Byte |= 0x80;
- EmitHex(Byte);
- if (IsMore) O << ", ";
- } while (IsMore);
+ // Gather the details (simplify add attribute code.)
+ const std::string &Name = 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);
+ SubprogramDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
+ SubprogramDie->AddUInt (DW_AT_external, DW_FORM_flag, IsExternal);
+
+ // 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;
}
-/// EmitLabelName - Emit label name for internal use by dwarf.
+/// NewScopeVariable - Create a new scope variable.
///
-void DwarfWriter::EmitLabelName(const char *Tag, int Num) const {
- O << Asm->PrivateGlobalPrefix
- << "debug_"
- << Tag
- << Num;
+DIE *DwarfWriter::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);
+ VariableDie->AddString(DW_AT_name, DW_FORM_string, VD->getName());
+
+ // 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);
+
+ // Add variable address.
+ MachineLocation Location;
+ Asm->TM.getRegisterInfo()->getLocation(*MF, DV->getFrameIndex(), Location);
+ AddAddress(VariableDie, DW_AT_location, Location);
+
+ return VariableDie;
}
-/// EmitLabel - Emit location label for internal use by dwarf.
+/// ConstructScope - Construct the components of a scope.
///
-void DwarfWriter::EmitLabel(const char *Tag, int Num) const {
- EmitLabelName(Tag, Num);
- O << ":\n";
+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));
+ }
+
+ // 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(Asm->TM.getRegisterInfo()->getFrameRegister(*MF));
+ AddAddress(SPDie, DW_AT_frame_base, Location);
+
+ ConstructScope(RootScope, SPDie, Unit);
}
-/// EmitInitial -Emit initial dwarf declarations.
+/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
+/// tools to recognize the object file contains Dwarf information.
///
void DwarfWriter::EmitInitial() const {
- // Dwarf section's base addresses.
- Asm->SwitchSection(DwarfAbbrevSection, 0);
- EmitLabel("abbrev", 0);
+ // Dwarf sections base addresses.
+ Asm->SwitchSection(DwarfFrameSection, 0);
+ EmitLabel("section_frame", 0);
Asm->SwitchSection(DwarfInfoSection, 0);
+ EmitLabel("section_info", 0);
EmitLabel("info", 0);
+ Asm->SwitchSection(DwarfAbbrevSection, 0);
+ EmitLabel("section_abbrev", 0);
+ EmitLabel("abbrev", 0);
+ Asm->SwitchSection(DwarfARangesSection, 0);
+ EmitLabel("section_aranges", 0);
+ Asm->SwitchSection(DwarfMacInfoSection, 0);
+ EmitLabel("section_macinfo", 0);
Asm->SwitchSection(DwarfLineSection, 0);
+ EmitLabel("section_line", 0);
EmitLabel("line", 0);
+ Asm->SwitchSection(DwarfLocSection, 0);
+ EmitLabel("section_loc", 0);
+ Asm->SwitchSection(DwarfPubNamesSection, 0);
+ EmitLabel("section_pubnames", 0);
+ Asm->SwitchSection(DwarfStrSection, 0);
+ EmitLabel("section_str", 0);
+ Asm->SwitchSection(DwarfRangesSection, 0);
+ EmitLabel("section_ranges", 0);
+
+ Asm->SwitchSection(TextSection, 0);
+ EmitLabel("text_begin", 0);
+ Asm->SwitchSection(DataSection, 0);
+ EmitLabel("data_begin", 0);
+}
+
+/// 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";
+
+ // 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;
+ }
+ }
+
+ 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]);
+ }
+
+ EmitInt8(0); EOL("End Of Children Mark");
+ }
+}
+
+/// 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();
+
+ // Record the abbreviation.
+ Die->Complete(*this);
+
+ // Get the abbreviation for this DIE.
+ unsigned AbbrevID = Die->getAbbrevID();
+ const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
+
+ // 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 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());
+ }
+
+ // Emit the DIE children if any.
+ if (!Children.empty()) {
+ assert(Abbrev.getChildrenFlag() == DW_CHILDREN_yes &&
+ "Children flag not set");
+
+ for (unsigned j = 0, M = Children.size(); j < M; ++j) {
+ Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
+ }
+
+ // End of children marker.
+ Offset += sizeof(int8_t);
+ }
+
+ Die->setSize(Offset - Die->getOffset());
+ return Offset;
+}
+
+/// SizeAndOffsets - Compute the size and offset of all the DIEs.
+///
+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);
+ }
+ }
+}
+
+/// EmitDebugInfo - Emit the debug info section.
+///
+void DwarfWriter::EmitDebugInfo() const {
+ // Start debug info section.
+ Asm->SwitchSection(DwarfInfoSection, 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");
+ EmitReference("abbrev_begin", 0); EOL("Offset Into Abbrev. Section");
+ EmitInt8(AddressSize); EOL("Address Size (in bytes)");
+
+ EmitDIE(Die);
+ EmitLabel("info_end", Unit->getID());
+ }
+
+ O << "\n";
+ }
+}
+
+/// 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->SwitchSection(DwarfAbbrevSection, 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";
+ }
+
+ EmitLabel("abbrev_end", 0);
+
+ O << "\n";
+ }
+}
+
+/// 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;
+
+ // Start the dwarf line section.
+ Asm->SwitchSection(DwarfLineSection, 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");
+
+ EmitInt8(1); EOL("Default is_stmt_start flag");
+
+ EmitInt8(MinLineDelta); EOL("Line Base Value (Special Opcodes)");
+
+ EmitInt8(MaxLineDelta); EOL("Line Range Value (Special Opcodes)");
+
+ EmitInt8(-MinLineDelta); EOL("Special Opcode Base");
+
+ // 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");
+
+ const UniqueVector<std::string> &Directories = DebugInfo->getDirectories();
+ const UniqueVector<SourceFileInfo> &SourceFiles = DebugInfo->getSourceFiles();
+
+ // Emit directories.
+ for (unsigned DirectoryID = 1, NDID = Directories.size();
+ DirectoryID <= NDID; ++DirectoryID) {
+ EmitString(Directories[DirectoryID]); EOL("Directory");
+ }
+ 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");
+ }
+ EmitInt8(0); EOL("End of files");
+
+ EmitLabel("line_prolog_end", 0);
+
+ // Emit line information
+ const std::vector<SourceLineInfo *> &LineInfos = DebugInfo->getSourceLines();
+
+ // 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"
+ << Asm->CommentString << " "
+ << Directories[DirectoryID]
+ << SourceFile.getName() << ":"
+ << LineInfo->getLine() << "\n";
+ }
+
+ // 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");
+ }
+ }
+
+ // Define last address.
+ EmitInt8(0); EOL("Extended Op");
+ EmitInt8(4 + 1); EOL("Op size");
+ EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
+ EmitReference("text_end", 0); EOL("Location 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";
+}
+
+/// EmitDebugFrame - Emit visible names into a debug frame section.
+///
+void DwarfWriter::EmitDebugFrame() {
+ // Start the dwarf pubnames section.
+ Asm->SwitchSection(DwarfFrameSection, 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");
+ // FIXME - needs to change based on stack direction.
+ EmitSLEB128Bytes(-sizeof(int32_t)); EOL("CIE Data Alignment Factor");
+ // FIXME - hard coded for PPC (LR).
+ EmitInt8(0x41); EOL("CIE RA Column Hardcoded (PPC LR)");
+ // FIXME - hard coded for PPC 0(SP).
+ EmitULEB128Bytes(DW_CFA_def_cfa); EOL("DW_CFA_def_cfa");
+ EmitULEB128Bytes(1); EOL("PPC Register SP");
+ EmitULEB128Bytes(0); EOL("PPC offset 0 as in 0(SP)");
+ EmitAlign(2);
+ EmitLabel("frame_common_end", 0);
+
+ O << "\n";
+}
+
+/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
+///
+void DwarfWriter::EmitDebugPubNames() {
+ // Start the dwarf pubnames section.
+ Asm->SwitchSection(DwarfPubNamesSection, 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");
+
+ EmitReference("info_begin", Unit->getID());
+ 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";
+ }
+ }
+}
+
+/// EmitDebugStr - Emit visible names into a debug str section.
+///
+void DwarfWriter::EmitDebugStr() {
+ // Check to see if it is worth the effort.
+ if (!StringPool.empty()) {
+ // Start the dwarf str section.
+ Asm->SwitchSection(DwarfStrSection, 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";
+ }
+}
+
+/// EmitDebugLoc - Emit visible names into a debug loc section.
+///
+void DwarfWriter::EmitDebugLoc() {
+ // Start the dwarf loc section.
+ Asm->SwitchSection(DwarfLocSection, 0);
+
+ O << "\n";
+}
+
+/// EmitDebugARanges - Emit visible names into a debug aranges section.
+///
+void DwarfWriter::EmitDebugARanges() {
+ // Start the dwarf aranges section.
+ Asm->SwitchSection(DwarfARangesSection, 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");
+
+ EmitInt8(AddressSize); EOL("Size of Address");
+
+ EmitInt8(0); EOL("Size of Segment Descriptor");
+
+ EmitInt16(0); EOL("Pad (1)");
+ EmitInt16(0); EOL("Pad (2)");
+
+ // Range 1
+ EmitReference("text_begin", 0); EOL("Address");
+ EmitDifference("text_end", 0, "text_begin", 0); EOL("Length");
+
+ EmitInt32(0); EOL("EOM (1)");
+ EmitInt32(0); EOL("EOM (2)");
+
+ O << "\n";
+ }
+ }
+#endif
+}
+
+/// EmitDebugRanges - Emit visible names into a debug ranges section.
+///
+void DwarfWriter::EmitDebugRanges() {
+ // Start the dwarf ranges section.
+ Asm->SwitchSection(DwarfRangesSection, 0);
+
+ O << "\n";
+}
+
+/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+///
+void DwarfWriter::EmitDebugMacInfo() {
+ // Start the dwarf macinfo section.
+ Asm->SwitchSection(DwarfMacInfoSection, 0);
+
+ O << "\n";
+}
+
+/// 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);
+ }
+}
+
+/// ConstructGlobalDIEs - Create DIEs for each of the externally visible global
+/// variables.
+void DwarfWriter::ConstructGlobalDIEs() {
+ std::vector<GlobalVariableDesc *> GlobalVariables =
+ DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(*M);
+
+ for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
+ GlobalVariableDesc *GVD = GlobalVariables[i];
+ NewGlobalVariable(GVD);
+ }
}
-/// ShouldEmitDwarf - Determine if dwarf declarations should be made.
+/// 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);
+ }
+}
+
+/// ShouldEmitDwarf - Determine if Dwarf declarations should be made.
///
bool DwarfWriter::ShouldEmitDwarf() {
// Check if debug info is present.
// Make sure initial declarations are made.
if (!didInitial) {
EmitInitial();
+
+ // 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();
+
didInitial = true;
}
return true;
}
-/// BeginModule - Emit all dwarf sections that should come prior to the content.
+//===----------------------------------------------------------------------===//
+// Main entry points.
+//
+
+DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A)
+: O(OS)
+, Asm(A)
+, M(NULL)
+, MF(NULL)
+, DebugInfo(NULL)
+, didInitial(false)
+, SubprogramCount(0)
+, CompileUnits()
+, Abbreviations()
+, StringPool()
+, DescToUnitMap()
+, DescToDieMap()
+, TypeToDieMap()
+, AddressSize(sizeof(int32_t))
+, hasLEB128(false)
+, hasDotLoc(false)
+, hasDotFile(false)
+, needsSet(false)
+, DwarfAbbrevSection(".debug_abbrev")
+, DwarfInfoSection(".debug_info")
+, DwarfLineSection(".debug_line")
+, DwarfFrameSection(".debug_frame")
+, DwarfPubNamesSection(".debug_pubnames")
+, DwarfPubTypesSection(".debug_pubtypes")
+, DwarfStrSection(".debug_str")
+, DwarfLocSection(".debug_loc")
+, DwarfARangesSection(".debug_aranges")
+, DwarfRangesSection(".debug_ranges")
+, DwarfMacInfoSection(".debug_macinfo")
+, TextSection(".text")
+, DataSection(".data")
+{}
+DwarfWriter::~DwarfWriter() {
+ for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
+ delete CompileUnits[i];
+ }
+}
+
+/// BeginModule - Emit all Dwarf sections that should come prior to the content.
///
-void DwarfWriter::BeginModule() {
+void DwarfWriter::BeginModule(Module *M) {
+ this->M = M;
+
if (!ShouldEmitDwarf()) return;
- EmitComment("Dwarf Begin Module");
+ EOL("Dwarf Begin Module");
}
-/// EndModule - Emit all dwarf sections that should come after the content.
+/// EndModule - Emit all Dwarf sections that should come after the content.
///
void DwarfWriter::EndModule() {
if (!ShouldEmitDwarf()) return;
- EmitComment("Dwarf End Module");
- // Print out dwarf file info
- std::vector<std::string> Sources = DebugInfo->getSourceFiles();
- for (unsigned i = 0, N = Sources.size(); i < N; i++) {
- O << "\t; .file\t" << (i + 1) << "," << "\"" << Sources[i] << "\"" << "\n";
- }
+ EOL("Dwarf End Module");
+
+ // Standard sections final addresses.
+ Asm->SwitchSection(TextSection, 0);
+ EmitLabel("text_end", 0);
+ Asm->SwitchSection(DataSection, 0);
+ EmitLabel("data_end", 0);
+
+ // 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 frame section.
+ EmitDebugFrame();
+
+ // 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 - Emit pre-function debug information.
+/// BeginFunction - Gather pre-function debug information.
///
-void DwarfWriter::BeginFunction() {
+void DwarfWriter::BeginFunction(MachineFunction *MF) {
+ this->MF = MF;
+
if (!ShouldEmitDwarf()) return;
- EmitComment("Dwarf Begin Function");
+ EOL("Dwarf Begin Function");
+
+ // Define begin label for subprogram.
+ Asm->SwitchSection(TextSection, 0);
+ EmitLabel("func_begin", ++SubprogramCount);
}
-/// EndFunction - Emit post-function debug information.
+
+/// EndFunction - Gather and emit post-function debug information.
///
void DwarfWriter::EndFunction() {
if (!ShouldEmitDwarf()) return;
- EmitComment("Dwarf End Function");
+ EOL("Dwarf End Function");
+
+ // Define end label for subprogram.
+ Asm->SwitchSection(TextSection, 0);
+ EmitLabel("func_end", SubprogramCount);
+
+ // Construct scopes for subprogram.
+ ConstructRootScope(DebugInfo->getRootScope());
+ DebugInfo->ClearScopes();
}
projects / oota-llvm.git / blobdiff