#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 dwarf;
+using namespace llvm::dwarf;
static cl::opt<bool>
DwarfVerbose("dwarf-verbose", cl::Hidden,
//===----------------------------------------------------------------------===//
// Forward declarations.
//
-class CompileUnit;
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.
, Form(F)
{}
- // Accessors
+ // Accessors.
unsigned getAttribute() const { return Attribute; }
unsigned getForm() const { return Form; }
{}
~DIEAbbrev() {}
- // Accessors
+ // Accessors.
unsigned getTag() const { return Tag; }
unsigned getChildrenFlag() const { return ChildrenFlag; }
const std::vector<DIEAbbrevData> &getData() const { return Data; }
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;
isLabel,
isAsIsLabel,
isDelta,
- isEntry
+ isEntry,
+ isBlock
};
unsigned Type; // Type of the value
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;
static bool classof(const DIEntry *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isEntry; }
- /// EmitValue - Emit delta value.
+ /// EmitValue - Emit debug information entry offset.
///
virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
- /// SizeOf - Determine size of delta value in bytes.
+ /// 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.
DIE(unsigned Tag);
~DIE();
- // Accessors
+ // Accessors.
unsigned getAbbrevID() const { return AbbrevID; }
unsigned getOffset() const { return Offset; }
unsigned getSize() const { return Size; }
/// 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 AddDelta(unsigned Attribute, unsigned Form,
const DWLabel &Hi, const DWLabel &Lo);
- /// AddDIEntry - Add a DIE attribute data and value.
+ /// 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.
///
//===----------------------------------------------------------------------===//
+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 {
//===----------------------------------------------------------------------===//
+/// 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;
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);
/// EmitValue - Emit label value.
///
void DIEObjectLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
- DW.EmitInt8(sizeof(int8_t) + DW.getAddressSize());
- DW.EOL("DW_FORM_block1 length");
-
- DW.EmitInt8(DW_OP_addr);
- DW.EOL("DW_OP_addr");
-
DW.EmitReference(Label);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEObjectLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
- return sizeof(int8_t) + sizeof(int8_t) + DW.getAddressSize();
+ return DW.getAddressSize();
}
//===----------------------------------------------------------------------===//
}
//===----------------------------------------------------------------------===//
-/// EmitValue - Emit extry offset.
+/// EmitValue - Emit debug information entry offset.
///
void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitInt32(Entry->getOffset());
}
-/// SizeOf - Determine size of label value in bytes.
+/// 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 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)
}
}
+/// 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) {
- if (Form == 0) {
- if ((unsigned char)Integer == Integer) Form = DW_FORM_data1;
- else if ((unsigned short)Integer == Integer) Form = DW_FORM_data2;
- else if ((unsigned int)Integer == Integer) Form = DW_FORM_data4;
- else Form = DW_FORM_data8;
- }
+ DIEInteger *DI = new DIEInteger(Integer);
+ Values.push_back(DI);
+ if (!Form) Form = DI->BestForm(false);
Abbrev->AddAttribute(Attribute, Form);
- Values.push_back(new DIEInteger(Integer));
}
/// AddSInt - Add an signed integer attribute data and value.
///
void DIE::AddSInt(unsigned Attribute, unsigned Form, int64_t Integer) {
- if (Form == 0) {
- if ((char)Integer == Integer) Form = DW_FORM_data1;
- else if ((short)Integer == Integer) Form = DW_FORM_data2;
- else if ((int)Integer == Integer) Form = DW_FORM_data4;
- else Form = DW_FORM_data8;
- }
+ DIEInteger *DI = new DIEInteger(Integer);
+ Values.push_back(DI);
+ if (!Form) Form = DI->BestForm(true);
Abbrev->AddAttribute(Attribute, Form);
- Values.push_back(new DIEInteger(Integer));
}
/// AddString - Add a std::string attribute data and value.
///
void DIE::AddString(unsigned Attribute, unsigned Form,
const std::string &String) {
- Abbrev->AddAttribute(Attribute, Form);
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) {
- Abbrev->AddAttribute(Attribute, Form);
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) {
- Abbrev->AddAttribute(Attribute, Form);
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) {
- Abbrev->AddAttribute(Attribute, Form);
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) {
- Abbrev->AddAttribute(Attribute, Form);
+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
/// 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) {
+ if (DwarfVerbose && !Comment.empty()) {
O << "\t"
<< Asm->CommentString
<< " "
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 {
return DWLabel("string", StringID);
}
-/// NewBasicType - Creates a new basic type if necessary, then adds to the
-/// owner.
-/// FIXME - Should never be needed.
-DIE *DwarfWriter::NewBasicType(DIE *Owner, Type *Ty) {
- DIE *&Slot = TypeToDieMap[Ty];
- if (Slot) return Slot;
-
- const char *Name;
- unsigned Size;
- unsigned Encoding = 0;
-
- switch (Ty->getTypeID()) {
- case Type::UByteTyID:
- Name = "unsigned char";
- Size = 1;
- Encoding = DW_ATE_unsigned_char;
- break;
- case Type::SByteTyID:
- Name = "char";
- Size = 1;
- Encoding = DW_ATE_signed_char;
- break;
- case Type::UShortTyID:
- Name = "unsigned short";
- Size = 2;
- Encoding = DW_ATE_unsigned;
- break;
- case Type::ShortTyID:
- Name = "short";
- Size = 2;
- Encoding = DW_ATE_signed;
- break;
- case Type::UIntTyID:
- Name = "unsigned int";
- Size = 4;
- Encoding = DW_ATE_unsigned;
- break;
- case Type::IntTyID:
- Name = "int";
- Size = 4;
- Encoding = DW_ATE_signed;
- break;
- case Type::ULongTyID:
- Name = "unsigned long long";
- Size = 7;
- Encoding = DW_ATE_unsigned;
- break;
- case Type::LongTyID:
- Name = "long long";
- Size = 7;
- Encoding = DW_ATE_signed;
- break;
- case Type::FloatTyID:
- Name = "float";
- Size = 4;
- Encoding = DW_ATE_float;
- break;
- case Type::DoubleTyID:
- Name = "double";
- Size = 8;
- Encoding = DW_ATE_float;
- break;
- default:
- // FIXME - handle more complex types.
- Name = "unknown";
- Size = 1;
- Encoding = DW_ATE_address;
- break;
+/// 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);
}
-
- // construct the type DIE.
- Slot = new DIE(DW_TAG_base_type);
- Slot->AddString(DW_AT_name, DW_FORM_string, Name);
- Slot->AddUInt (DW_AT_byte_size, 0, Size);
- Slot->AddUInt (DW_AT_encoding, DW_FORM_data1, Encoding);
-
- // Add to context owner.
- Owner->AddChild(Slot);
-
- return Slot;
}
-/// NewGlobalType - Make the type visible globally using the given name.
-///
-void DwarfWriter::NewGlobalType(const std::string &Name, DIE *Type) {
- assert(!GlobalTypes[Name] && "Duplicate global type");
- GlobalTypes[Name] = Type;
+/// 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 {
+ Block->AddUInt(DW_FORM_data1, DW_OP_breg0 + Location.getRegister());
+ Block->AddUInt(DW_FORM_sdata, Location.getOffset());
+ }
+ Block->ComputeSize(*this);
+ Die->AddBlock(Attribute, 0, Block);
}
-/// NewGlobalEntity - Make the entity visible globally using the given name.
-///
-void DwarfWriter::NewGlobalEntity(const std::string &Name, DIE *Entity) {
- assert(!GlobalEntities[Name] && "Duplicate global variable or function");
- GlobalEntities[Name] = Entity;
+/// 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 *Unit, TypeDesc *TyDesc) {
- // FIXME - hack to get around NULL types short term.
- if (!TyDesc) return NewBasicType(Unit, Type::IntTy);
+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;
+ }
+
+ // FIXME - Should handle other contexts that compile units.
// Check for pre-existence.
- DIE *&Slot = DescToDieMap[TyDesc];
+ DIE *&Slot = Unit->getDieMapSlotFor(TyDesc);
if (Slot) return Slot;
// Get core information.
const std::string &Name = TyDesc->getName();
- // FIXME - handle larger sizes.
- unsigned Size = TyDesc->getSize() >> 3;
+ uint64_t Size = TyDesc->getSize() >> 3;
DIE *Ty = NULL;
unsigned Encoding = BasicTy->getEncoding();
Ty->AddUInt (DW_AT_encoding, DW_FORM_data1, Encoding);
} else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
- // Determine which derived type.
- unsigned T = 0;
- switch (DerivedTy->getTag()) {
- case DI_TAG_typedef: T = DW_TAG_typedef; break;
- case DI_TAG_pointer: T = DW_TAG_pointer_type; break;
- case DI_TAG_reference: T = DW_TAG_reference_type; break;
- default: assert( 0 && "Unknown tag on derived type");
- }
-
// Create specific DIE.
- Slot = Ty = new DIE(T);
+ 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(Unit, FromTy));
+ 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;
}
}
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 present.
- if (CompileUnitDesc *File = TyDesc->getFile()) {
- unsigned FileID = DebugInfo->RecordSource(File);
- int Line = TyDesc->getLine();
- Ty->AddUInt(DW_AT_decl_file, 0, FileID);
- Ty->AddUInt(DW_AT_decl_line, 0, Line);
- }
+ // Add source line info if available.
+ AddSourceLine(Ty, TyDesc->getFile(), TyDesc->getLine());
// Add to context owner.
- Unit->AddChild(Ty);
+ Context->AddChild(Ty);
return Slot;
}
-/// NewCompileUnit - Create new compile unit DIE.
+/// NewCompileUnit - Create new compile unit and it's debug information entry.
///
-DIE *DwarfWriter::NewCompileUnit(CompileUnitDesc *CompileUnit) {
- // Check for pre-existence.
- DIE *&Slot = DescToDieMap[CompileUnit];
- if (Slot) return Slot;
-
- DIE *Unit = new DIE(DW_TAG_compile_unit);
- // FIXME - use the correct line set.
- Unit->AddLabel (DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0));
- Unit->AddLabel (DW_AT_high_pc, DW_FORM_addr, DWLabel("text_end", 0));
- Unit->AddLabel (DW_AT_low_pc, DW_FORM_addr, DWLabel("text_begin", 0));
- Unit->AddString(DW_AT_producer, DW_FORM_string, CompileUnit->getProducer());
- Unit->AddUInt (DW_AT_language, DW_FORM_data1, CompileUnit->getLanguage());
- Unit->AddString(DW_AT_name, DW_FORM_string, CompileUnit->getFileName());
- Unit->AddString(DW_AT_comp_dir, DW_FORM_string, CompileUnit->getDirectory());
-
- Slot = Unit;
+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;
}
+/// 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;
+}
+
/// 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 = DescToDieMap[GVD];
+ DIE *&Slot = Unit->getDieMapSlotFor(GVD);
if (Slot) return Slot;
- // Get the compile unit context.
- CompileUnitDesc *CompileUnit =
- static_cast<CompileUnitDesc *>(GVD->getContext());
- DIE *Unit = NewCompileUnit(CompileUnit);
// Get the global variable itself.
GlobalVariable *GV = GVD->getGlobalVariable();
// Generate the mangled name.
// Gather the details (simplify add attribute code.)
const std::string &Name = GVD->getName();
- unsigned FileID = DebugInfo->RecordSource(CompileUnit);
- unsigned Line = GVD->getLine();
// Get the global's type.
- DIE *Type = NewType(Unit, GVD->getTypeDesc());
+ 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->AddUInt (DW_AT_decl_file, 0, FileID);
- VariableDie->AddUInt (DW_AT_decl_line, 0, Line);
VariableDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
VariableDie->AddUInt (DW_AT_external, DW_FORM_flag, 1);
- // FIXME - needs to be a proper expression.
- VariableDie->AddObjectLabel(DW_AT_location, DW_FORM_block1, MangledName);
+
+ // 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->AddChild(VariableDie);
+ Unit->getDie()->AddChild(VariableDie);
// Expose as global.
- NewGlobalEntity(Name, VariableDie);
+ // FIXME - need to check external flag.
+ Unit->AddGlobal(Name, VariableDie);
return VariableDie;
}
/// 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 = DescToDieMap[SPD];
+ DIE *&Slot = Unit->getDieMapSlotFor(SPD);
if (Slot) return Slot;
- // Get the compile unit context.
- CompileUnitDesc *CompileUnit =
- static_cast<CompileUnitDesc *>(SPD->getContext());
- DIE *Unit = NewCompileUnit(CompileUnit);
-
// Gather the details (simplify add attribute code.)
const std::string &Name = SPD->getName();
- unsigned FileID = DebugInfo->RecordSource(CompileUnit);
- // FIXME - faking the line for the time being.
- unsigned Line = 1;
-
- // FIXME - faking the type for the time being.
- DIE *Type = NewBasicType(Unit, Type::IntTy);
+ DIE *Type = NewType(Unit->getDie(), SPD->getType(), Unit);
+ unsigned IsExternal = SPD->isStatic() ? 0 : 1;
- DIE *SubprogramDie = new DIE(DW_TAG_variable);
+ DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
SubprogramDie->AddString (DW_AT_name, DW_FORM_string, Name);
- SubprogramDie->AddUInt (DW_AT_decl_file, 0, FileID);
- SubprogramDie->AddUInt (DW_AT_decl_line, 0, Line);
SubprogramDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
- SubprogramDie->AddUInt (DW_AT_external, DW_FORM_flag, 1);
+ 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->AddChild(SubprogramDie);
+ Unit->getDie()->AddChild(SubprogramDie);
// Expose as global.
- NewGlobalEntity(Name, SubprogramDie);
+ Unit->AddGlobal(Name, SubprogramDie);
return SubprogramDie;
}
+/// NewScopeVariable - Create a new scope variable.
+///
+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;
+}
+
+/// 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));
+ }
+
+ // 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. This is necessary for cc
/// tools to recognize the object file contains Dwarf information.
///
const std::vector<DIE *> &Children = Die->getChildren();
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- // FIXME - handle sibling offsets.
- // FIXME - handle all DIE types.
EmitDIE(Children[j]);
}
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
///
-unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset) {
+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);
}
// Emit the DIE children if any.
- if (Abbrev.getChildrenFlag() == DW_CHILDREN_yes) {
- const std::vector<DIE *> &Children = Die->getChildren();
+ if (!Children.empty()) {
+ assert(Abbrev.getChildrenFlag() == DW_CHILDREN_yes &&
+ "Children flag not set");
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- // FIXME - handle sibling offsets.
- // FIXME - handle all DIE types.
- Offset = SizeAndOffsetDie(Children[j], Offset);
+ Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
}
// End of children marker.
/// SizeAndOffsets - Compute the size and offset of all the DIEs.
///
void DwarfWriter::SizeAndOffsets() {
- unsigned Offset = 0;
// Process each compile unit.
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
- // Compute size of compile unit header
- 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)
-
- Offset = SizeAndOffsetDie(CompileUnits[i], Offset);
+ 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);
+ }
}
}
// Start debug info section.
Asm->SwitchSection(DwarfInfoSection, 0);
- // Get the number of compile units.
- unsigned N = CompileUnits.size();
-
- // If there are any compile units.
- if (N) {
- EmitLabel("info_begin", 0);
-
- // Process each compile unit.
- for (unsigned i = 0; i < N; ++i) {
+ // 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 = CompileUnits[i]->getSize() +
+ unsigned ContentSize = Die->getSize() +
sizeof(int16_t) + // DWARF version number
sizeof(int32_t) + // Offset Into Abbrev. Section
sizeof(int8_t); // Pointer Size (in bytes)
EmitReference("abbrev_begin", 0); EOL("Offset Into Abbrev. Section");
EmitInt8(AddressSize); EOL("Address Size (in bytes)");
- EmitDIE(CompileUnits[i]);
+ EmitDIE(Die);
+ EmitLabel("info_end", Unit->getID());
}
-
- EmitLabel("info_end", 0);
O << "\n";
}
EmitInt8(0); EOL("Extended Op");
EmitInt8(4 + 1); EOL("Op size");
EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
- EmitReference("loc", i + 1); EOL("Location label");
+ 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(0); EOL("New Source");
+ EmitULEB128Bytes(Source); EOL("New Source");
}
// If change of line.
/// EmitDebugFrame - Emit visible names into a debug frame section.
///
void DwarfWriter::EmitDebugFrame() {
- // FIXME - Should be per frame
+ // 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() {
- // Check to see if it is worth the effort.
- if (!GlobalEntities.empty()) {
- // Start the dwarf pubnames section.
- Asm->SwitchSection(DwarfPubNamesSection, 0);
-
- EmitDifference("pubnames_end", 0, "pubnames_begin", 0);
- EOL("Length of Public Names Info");
-
- EmitLabel("pubnames_begin", 0);
+ // Start the dwarf pubnames section.
+ Asm->SwitchSection(DwarfPubNamesSection, 0);
- EmitInt16(DWARF_VERSION); EOL("DWARF Version");
+ // Process each compile unit.
+ for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
+ CompileUnit *Unit = CompileUnits[i];
- EmitReference("info_begin", 0); EOL("Offset of Compilation Unit Info");
+ 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", 0, "info_begin", 0);
- EOL("Compilation Unit Length");
-
- for (std::map<std::string, DIE *>::iterator GI = GlobalEntities.begin(),
- GE = GlobalEntities.end();
- GI != GE; ++GI) {
- const std::string &Name = GI->first;
- DIE * Entity = GI->second;
+ EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID());
+ EOL("Compilation Unit Length");
- EmitInt32(Entity->getOffset()); EOL("DIE offset");
- EmitString(Name); EOL("External Name");
+ 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";
}
-
- EmitInt32(0); EOL("End Mark");
- EmitLabel("pubnames_end", 0);
-
- O << "\n";
- }
-}
-
-/// EmitDebugPubTypes - Emit visible names into a debug pubtypes section.
-///
-void DwarfWriter::EmitDebugPubTypes() {
- // Check to see if it is worth the effort.
- if (!GlobalTypes.empty()) {
- // Start the dwarf pubtypes section.
- Asm->SwitchSection(DwarfPubTypesSection, 0);
-
- O << "\n";
}
}
// Start the dwarf str section.
Asm->SwitchSection(DwarfStrSection, 0);
- // For each of strings in teh string pool.
+ // 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.
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");
- // Don't include size of length
- EmitInt32(0x1c); EOL("Length of Address Ranges Info");
-
- EmitInt16(DWARF_VERSION); EOL("Dwarf Version");
-
- EmitReference("info_begin", 0); EOL("Offset of Compilation Unit Info");
-
- EmitInt8(AddressSize); EOL("Size of Address");
+ EmitInt8(AddressSize); EOL("Size of Address");
- EmitInt8(0); EOL("Size of Segment Descriptor");
+ EmitInt8(0); EOL("Size of Segment Descriptor");
- EmitInt16(0); EOL("Pad (1)");
- EmitInt16(0); EOL("Pad (2)");
+ 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");
+ // 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";
+ EmitInt32(0); EOL("EOM (1)");
+ EmitInt32(0); EOL("EOM (2)");
+
+ O << "\n";
+ }
+ }
+#endif
}
/// EmitDebugRanges - Emit visible names into a debug ranges section.
const UniqueVector<CompileUnitDesc *> CUW = DebugInfo->getCompileUnits();
for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
- DIE *Unit = NewCompileUnit(CUW[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(Module &M) {
+void DwarfWriter::ConstructGlobalDIEs() {
std::vector<GlobalVariableDesc *> GlobalVariables =
- DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(M);
+ DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(*M);
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalVariableDesc *GVD = GlobalVariables[i];
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
/// subprograms.
-void DwarfWriter::ConstructSubprogramDIEs(Module &M) {
+void DwarfWriter::ConstructSubprogramDIEs() {
std::vector<SubprogramDesc *> Subprograms =
- DebugInfo->getAnchoredDescriptors<SubprogramDesc>(M);
+ DebugInfo->getAnchoredDescriptors<SubprogramDesc>(*M);
for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
SubprogramDesc *SPD = Subprograms[i];
// 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;
}
DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A)
: O(OS)
, Asm(A)
+, M(NULL)
+, MF(NULL)
, DebugInfo(NULL)
, didInitial(false)
+, SubprogramCount(0)
, CompileUnits()
, Abbreviations()
-, GlobalTypes()
-, GlobalEntities()
, StringPool()
+, DescToUnitMap()
, DescToDieMap()
, TypeToDieMap()
, AddressSize(sizeof(int32_t))
/// BeginModule - Emit all Dwarf sections that should come prior to the content.
///
-void DwarfWriter::BeginModule(Module &M) {
+void DwarfWriter::BeginModule(Module *M) {
+ this->M = M;
+
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Module");
}
/// EndModule - Emit all Dwarf sections that should come after the content.
///
-void DwarfWriter::EndModule(Module &M) {
+void DwarfWriter::EndModule() {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf End Module");
Asm->SwitchSection(DataSection, 0);
EmitLabel("data_end", 0);
- // Create all the compile unit DIEs.
- ConstructCompileUnitDIEs();
-
- // Create DIEs for each of the externally visible global variables.
- ConstructGlobalDIEs(M);
-
- // Create DIEs for each of the externally visible subprograms.
- ConstructSubprogramDIEs(M);
-
// Compute DIE offsets and sizes.
SizeAndOffsets();
EmitDebugLines();
// Emit info into a debug frame section.
- // EmitDebugFrame();
+ EmitDebugFrame();
// Emit info into a debug pubnames section.
EmitDebugPubNames();
- // Emit info into a debug pubtypes section.
- // EmitDebugPubTypes();
-
// Emit info into a debug str section.
EmitDebugStr();
/// BeginFunction - Gather pre-function debug information.
///
-void DwarfWriter::BeginFunction(MachineFunction &MF) {
+void DwarfWriter::BeginFunction(MachineFunction *MF) {
+ this->MF = MF;
+
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Function");
+
+ // Define begin label for subprogram.
+ Asm->SwitchSection(TextSection, 0);
+ EmitLabel("func_begin", ++SubprogramCount);
}
+
/// EndFunction - Gather and emit post-function debug information.
///
-void DwarfWriter::EndFunction(MachineFunction &MF) {
+void DwarfWriter::EndFunction() {
if (!ShouldEmitDwarf()) return;
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