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Coordinate activities with llvm-gcc4 and dwarf.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26314 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey
2006-02-22 19:02:11 +00:00
parent 410354fe0c
commit 0420f2aaf9
5 changed files with 331 additions and 277 deletions
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406
lib/CodeGen/DwarfWriter.cpp
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@ -774,12 +774,11 @@ unsigned DIEntry::SizeOf(const DwarfWriter &DW, unsigned Form) const {
//===----------------------------------------------------------------------===//
DIE::DIE(unsigned Tag, unsigned ChildrenFlag)
: Abbrev(new DIEAbbrev(Tag, ChildrenFlag))
DIE::DIE(unsigned Tag)
: Abbrev(new DIEAbbrev(Tag, DW_CHILDREN_no))
, AbbrevID(0)
, Offset(0)
, Size(0)
, Context(NULL)
, Children()
, Values()
{}
@ -794,8 +793,6 @@ DIE::~DIE() {
for (unsigned j = 0, M = Values.size(); j < M; ++j) {
delete Values[j];
}
if (Context) delete Context;
}
/// AddUInt - Add an unsigned integer attribute data and value.
@ -875,115 +872,14 @@ void DIE::Complete(DwarfWriter &DW) {
/// 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);
}
//===----------------------------------------------------------------------===//
/// NewBasicType - Creates a new basic type if necessary, then adds to the
/// context and owner.
DIE *DWContext::NewBasicType(const Type *Ty, unsigned Size, unsigned Align) {
DIE *TypeDie = Types[Ty];
// If first occurance of type.
if (!TypeDie) {
const char *Name;
unsigned Encoding = 0;
switch (Ty->getTypeID()) {
case Type::UByteTyID:
Name = "unsigned char";
Encoding = DW_ATE_unsigned_char;
break;
case Type::SByteTyID:
Name = "char";
Encoding = DW_ATE_signed_char;
break;
case Type::UShortTyID:
Name = "unsigned short";
Encoding = DW_ATE_unsigned;
break;
case Type::ShortTyID:
Name = "short";
Encoding = DW_ATE_signed;
break;
case Type::UIntTyID:
Name = "unsigned int";
Encoding = DW_ATE_unsigned;
break;
case Type::IntTyID:
Name = "int";
Encoding = DW_ATE_signed;
break;
case Type::ULongTyID:
Name = "unsigned long long";
Encoding = DW_ATE_unsigned;
break;
case Type::LongTyID:
Name = "long long";
Encoding = DW_ATE_signed;
break;
case Type::FloatTyID:
Name = "float";
Encoding = DW_ATE_float;
break;
case Type::DoubleTyID:
Name = "float";
Encoding = DW_ATE_float;
break;
default:
// FIXME - handle more complex types.
Name = "unknown";
Encoding = DW_ATE_address;
break;
}
// construct the type DIE.
TypeDie = new DIE(DW_TAG_base_type, DW_CHILDREN_no);
TypeDie->AddString(DW_AT_name, DW_FORM_string, Name);
TypeDie->AddUInt (DW_AT_byte_size, 0, Size);
TypeDie->AddUInt (DW_AT_encoding, DW_FORM_data1, Encoding);
TypeDie->Complete(DW);
// Add to context owner.
Owner->AddChild(TypeDie);
// Add to map.
Types[Ty] = TypeDie;
}
return TypeDie;
}
/// NewGlobalVariable - Creates a global variable, if necessary, then adds in
/// the context and owner.
DIE *DWContext::NewGlobalVariable(const std::string &Name,
const std::string &MangledName,
DIE *Type) {
DIE *VariableDie = Variables[MangledName];
// If first occurance of variable.
if (!VariableDie) {
// FIXME - need source file name line number.
VariableDie = new DIE(DW_TAG_variable, DW_CHILDREN_no);
VariableDie->AddString (DW_AT_name, DW_FORM_string, Name);
VariableDie->AddUInt (DW_AT_decl_file, 0, 0);
VariableDie->AddUInt (DW_AT_decl_line, 0, 0);
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);
VariableDie->Complete(DW);
// Add to context owner.
Owner->AddChild(VariableDie);
// Add to map.
Variables[MangledName] = VariableDie;
}
return VariableDie;
}
/// DWContext
//===----------------------------------------------------------------------===//
@ -1088,14 +984,14 @@ unsigned DwarfWriter::SizeSLEB128(int Value) {
///
void DwarfWriter::EmitInt8(int Value) const {
O << Asm->Data8bitsDirective;
PrintHex(Value);
PrintHex(Value & 0xFF);
}
/// EmitInt16 - Emit a short directive and value.
///
void DwarfWriter::EmitInt16(int Value) const {
O << Asm->Data16bitsDirective;
PrintHex(Value);
PrintHex(Value & 0xFFFF);
}
/// EmitInt32 - Emit a long directive and value.
@ -1161,8 +1057,8 @@ void DwarfWriter::EmitString(const std::string &String) const {
void DwarfWriter::PrintLabelName(const char *Tag, unsigned Number) const {
O << Asm->PrivateGlobalPrefix
<< "debug_"
<< Tag
<< Number;
<< Tag;
if (Number) O << Number;
}
/// EmitLabel - Emit location label for internal use by Dwarf.
@ -1240,6 +1136,88 @@ DWLabel DwarfWriter::NewString(const std::string &String) {
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;
}
// 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) {
@ -1254,49 +1232,142 @@ void DwarfWriter::NewGlobalEntity(const std::string &Name, DIE *Entity) {
GlobalEntities[Name] = Entity;
}
/// NewGlobalVariable - Add a new global variable DIE to the context.
///
void DwarfWriter::NewGlobalVariable(DWContext *Context,
const std::string &Name,
const std::string &MangledName,
const Type *Ty,
unsigned Size, unsigned Align) {
// Get the DIE type for the global.
DIE *Type = Context->NewBasicType(Ty, Size, Align);
DIE *Variable = Context->NewGlobalVariable(Name, MangledName, Type);
NewGlobalEntity(Name, Variable);
}
/// NewCompileUnit - Create new compile unit information.
///
DIE *DwarfWriter::NewCompileUnit(const CompileUnitDesc *CompileUnit) {
DIE *Unit = new DIE(DW_TAG_compile_unit, DW_CHILDREN_yes);
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("line", 0));
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());
Unit->Complete(*this);
Slot = Unit;
return Unit;
}
/// 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 *CompileUnit =
static_cast<CompileUnitDesc *>(GVD->getContext());
DIE *Unit = NewCompileUnit(CompileUnit);
// 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();
unsigned FileID = DebugInfo->RecordSource(CompileUnit);
unsigned Line = GVD->getLine();
// FIXME - faking the type for the time being.
DIE *Type = NewBasicType(Unit, Type::IntTy);
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 to map.
Slot = VariableDie;
// Add to context owner.
Unit->AddChild(VariableDie);
// Expose as global.
NewGlobalEntity(Name, VariableDie);
return VariableDie;
}
/// 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 *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 *SubprogramDie = new DIE(DW_TAG_variable);
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);
// Add to map.
Slot = SubprogramDie;
// Add to context owner.
Unit->AddChild(SubprogramDie);
// Expose as global.
NewGlobalEntity(Name, SubprogramDie);
return SubprogramDie;
}
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
/// tools to recognize the object file contains Dwarf information.
///
void DwarfWriter::EmitInitial() const {
// Dwarf sections base addresses.
Asm->SwitchSection(DwarfAbbrevSection, 0);
EmitLabel("abbrev", 0);
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);
// Standard sections base addresses.
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);
@ -1358,7 +1429,10 @@ void DwarfWriter::EmitDIE(DIE *Die) const {
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
///
unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset) const {
unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset) {
// Record the abbreviation.
Die->Complete(*this);
// Get the abbreviation for this DIE.
unsigned AbbrevID = Die->getAbbrevID();
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
@ -1550,6 +1624,17 @@ void DwarfWriter::EmitDebugLines() const {
// 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");
@ -1589,6 +1674,12 @@ void DwarfWriter::EmitDebugLines() const {
}
}
// 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";
@ -1727,7 +1818,6 @@ void DwarfWriter::ConstructCompileUnitDIEs() {
for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
DIE *Unit = NewCompileUnit(CUW[i]);
DWContext *Context = new DWContext(*this, NULL, Unit);
CompileUnits.push_back(Unit);
}
}
@ -1735,39 +1825,26 @@ void DwarfWriter::ConstructCompileUnitDIEs() {
/// ConstructGlobalDIEs - Create DIEs for each of the externally visible global
/// variables.
void DwarfWriter::ConstructGlobalDIEs(Module &M) {
const TargetData &TD = Asm->TM.getTargetData();
std::vector<GlobalVariableDesc *> GlobalVariables =
DebugInfo->getGlobalVariables(M);
DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(M);
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalVariableDesc *GVD = GlobalVariables[i];
GlobalVariable *GV = GVD->getGlobalVariable();
if (!GV->hasInitializer()) continue; // External global require no code
// FIXME - Use global info type information when available.
std::string Name = Asm->Mang->getValueName(GV);
Constant *C = GV->getInitializer();
const Type *Ty = C->getType();
unsigned Size = TD.getTypeSize(Ty);
unsigned Align = TD.getTypeAlignmentShift(Ty);
if (C->isNullValue() && /* FIXME: Verify correct */
(GV->hasInternalLinkage() || GV->hasWeakLinkage() ||
GV->hasLinkOnceLinkage())) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
}
/// FIXME - Get correct compile unit context.
assert(CompileUnits.size() && "No compile units");
DWContext *Context = CompileUnits[0]->getContext();
/// Create new global.
NewGlobalVariable(Context, GV->getName(), Name, Ty, Size, Align);
NewGlobalVariable(GVD);
}
}
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
/// subprograms.
void DwarfWriter::ConstructSubprogramDIEs(Module &M) {
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.
///
@ -1799,6 +1876,8 @@ DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A)
, GlobalTypes()
, GlobalEntities()
, StringPool()
, DescToDieMap()
, TypeToDieMap()
, AddressSize(sizeof(int32_t))
, hasLEB128(false)
, hasDotLoc(false)
@ -1849,6 +1928,9 @@ void DwarfWriter::EndModule(Module &M) {
// 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();