#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>
//===----------------------------------------------------------------------===//
// Forward declarations.
//
-class CompileUnit;
class DIE;
//===----------------------------------------------------------------------===//
private:
CompileUnitDesc *Desc; // Compile unit debug descriptor.
unsigned ID; // File ID for source.
- DIE *Die; // Compile unit die.
+ 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)
, ID(I)
, Die(D)
, Globals()
+ , DescToDieMap()
{}
~CompileUnit();
///
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];
+ }
};
//===----------------------------------------------------------------------===//
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;
static bool classof(const DIEntry *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isEntry; }
- /// EmitValue - Emit die entry offset.
+ /// EmitValue - Emit debug information entry offset.
///
virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
- /// SizeOf - Determine size of die entry in bytes.
+ /// SizeOf - Determine size of debug information entry in bytes.
///
virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
};
/// 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 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 die entry offset.
+/// EmitValue - Emit debug information entry offset.
///
void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitInt32(Entry->getOffset());
}
-/// SizeOf - Determine size of die 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);
}
}
+/// 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) {
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 *Context, 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.
- Context->AddChild(Slot);
-
- return Slot;
}
+/// 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);
+}
+
+/// 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) {
- // FIXME - hack to get around NULL types short term.
- if (!TyDesc) return NewBasicType(Context, 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.
// 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));
+ Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
+ NewType(Context, FromTy, Unit));
}
} else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)) {
// Create specific DIE.
case DW_TAG_array_type: {
// Add element type.
if (TypeDesc *FromTy = CompTy->getFromType()) {
- Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4, NewType(Context, FromTy));
+ Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4,
+ NewType(Context, FromTy, Unit));
}
// Don't emit size attribute.
Size = 0;
// Extract the basic information.
const std::string &Name = MemberDesc->getName();
- unsigned Line = MemberDesc->getLine();
TypeDesc *MemTy = MemberDesc->getFromType();
uint64_t Size = MemberDesc->getSize();
+ uint64_t Align = MemberDesc->getAlign();
uint64_t Offset = MemberDesc->getOffset();
- // Construct member die.
+ // Construct member debug information entry.
DIE *Member = new DIE(DW_TAG_member);
- // Add details.
+ // Add name if not "".
if (!Name.empty()) Member->AddString(DW_AT_name, DW_FORM_string, Name);
- if (CompileUnitDesc *File = MemberDesc->getFile()) {
- CompileUnit *FileUnit = FindCompileUnit(File);
- unsigned FileID = FileUnit->getID();
- int Line = MemberDesc->getLine();
- Member->AddUInt(DW_AT_decl_file, 0, FileID);
- Member->AddUInt(DW_AT_decl_line, 0, Line);
- }
+ // Add location if available.
+ AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
- // FIXME - Bitfields not quite right but getting there.
- uint64_t ByteSize = Size;
- uint64_t ByteOffset = Offset;
+ // 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));
- ByteSize = FromTy->getSize();
+ Member->AddDIEntry(DW_AT_type, DW_FORM_ref4,
+ NewType(Context, FromTy, Unit));
+ FieldSize = FromTy->getSize();
+ FieldAlign = FromTy->getSize();
}
- if (ByteSize != Size) {
- ByteOffset -= Offset % ByteSize;
- Member->AddUInt(DW_AT_byte_size, 0, ByteSize >> 3);
- Member->AddUInt(DW_AT_bit_size, 0, Size % ByteSize);
- Member->AddUInt(DW_AT_bit_offset, 0, Offset - ByteOffset);
+ // 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, ByteOffset >> 3);
+ Block->AddUInt(DW_FORM_udata, FieldOffset >> 3);
Block->ComputeSize(*this);
Member->AddBlock(DW_AT_data_member_location, 0, Block);
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()) {
- CompileUnit *FileUnit = FindCompileUnit(File);
- unsigned FileID = FileUnit->getID();
- 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.
Context->AddChild(Ty);
return Slot;
}
-/// NewCompileUnit - Create new compile unit and it's die.
+/// NewCompileUnit - Create new compile unit and it's debug information entry.
///
CompileUnit *DwarfWriter::NewCompileUnit(CompileUnitDesc *UnitDesc,
unsigned ID) {
Die->AddString(DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
Die->AddString(DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
- // Add die to descriptor map.
- DescToDieMap[UnitDesc] = Die;
+ // Add debug information entry to descriptor map.
+ DIE *&Slot = getDieMapSlotFor(UnitDesc);
+ Slot = Die;
// Construct compile unit.
CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
/// NewGlobalVariable - Add a new global variable DIE.
///
DIE *DwarfWriter::NewGlobalVariable(GlobalVariableDesc *GVD) {
- // Check for pre-existence.
- DIE *&Slot = DescToDieMap[GVD];
- if (Slot) return Slot;
-
// 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.
// Gather the details (simplify add attribute code.)
const std::string &Name = GVD->getName();
- unsigned FileID = Unit->getID();
- unsigned Line = GVD->getLine();
// Get the global's type.
- DIE *Type = NewType(Unit->getDie(), 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);
+
+ // 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);
/// NewSubprogram - Add a new subprogram DIE.
///
DIE *DwarfWriter::NewSubprogram(SubprogramDesc *SPD) {
- // Check for pre-existence.
- DIE *&Slot = DescToDieMap[SPD];
- if (Slot) return Slot;
-
// Get the compile unit context.
CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(SPD->getContext());
CompileUnit *Unit = FindCompileUnit(UnitDesc);
+ // Check for pre-existence.
+ DIE *&Slot = Unit->getDieMapSlotFor(SPD);
+ if (Slot) return Slot;
+
// Gather the details (simplify add attribute code.)
const std::string &Name = SPD->getName();
- unsigned FileID = Unit->getID();
- // FIXME - faking the line for the time being.
- unsigned Line = 1;
-
- // FIXME - faking the type for the time being.
- DIE *Type = NewBasicType(Unit->getDie(), Type::IntTy);
+ 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->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;
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.
sizeof(int16_t) + // DWARF version number
sizeof(int32_t) + // Offset Into Abbrev. Section
sizeof(int8_t); // Pointer Size (in bytes)
-
- SizeAndOffsetDie(Unit->getDie(), Offset);
+ SizeAndOffsetDie(Unit->getDie(), Offset, (i + 1) == 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()) {
/// 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.
// 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.
/// 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()
, StringPool()
/// 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();
/// 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