llvm::DwarfDebug Class Reference

Collects and handles dwarf debug information. More...

#include "CodeGen/AsmPrinter/DwarfDebug.h"

Inheritance diagram for llvm::DwarfDebug:

Public Types
enum class	MinimizeAddrInV5 {   Default , Disabled , Ranges , Expressions ,   Form }
enum class	DWARF5AccelTableKind { CU = 0 , TU = 1 }

Public Member Functions
	DwarfDebug (AsmPrinter *A)
	~DwarfDebug () override
void	beginModule (Module *M) override
	Emit all Dwarf sections that should come prior to the content.
void	endModule () override
	Emit all Dwarf sections that should come after the content.
const MachineInstr *	emitInitialLocDirective (const MachineFunction &MF, unsigned CUID)
	Emits inital debug location directive.
void	beginInstruction (const MachineInstr *MI) override
	Process beginning of an instruction.
void	beginCodeAlignment (const MachineBasicBlock &MBB) override
	Process beginning of code alignment.
void	addDwarfTypeUnitType (DwarfCompileUnit &CU, StringRef Identifier, DIE &Die, const DICompositeType *CTy)
	Add a DIE to the set of types that we're going to pull into type units.
void	addArangeLabel (SymbolCU SCU)
	Add a label so that arange data can be generated for it.
void	setSymbolSize (const MCSymbol *Sym, uint64_t Size) override
	For symbols that have a size designated (e.g.
bool	useAllLinkageNames () const
	Returns whether we should emit all DW_AT_[MIPS_]linkage_name.
bool	useGNUTLSOpcode () const
	Returns whether to use DW_OP_GNU_push_tls_address, instead of the standard DW_OP_form_tls_address opcode.
bool	useDWARF2Bitfields () const
	Returns whether to use the DWARF2 format for bitfields instyead of the DWARF4 format.
bool	useInlineStrings () const
	Returns whether to use inline strings.
bool	useRangesSection () const
	Returns whether ranges section should be emitted.
bool	alwaysUseRanges (const DwarfCompileUnit &) const
	Returns whether range encodings should be used for single entry range lists.
bool	useAddrOffsetExpressions () const
bool	useAddrOffsetForm () const
bool	useSectionsAsReferences () const
	Returns whether to use sections as labels rather than temp symbols.
bool	generateTypeUnits () const
	Returns whether to generate DWARF v4 type units.
AccelTableKind	getAccelTableKind () const
	Returns what kind (if any) of accelerator tables to emit.
void	setTheAccelTableKind (AccelTableKind K)
	Seet TheAccelTableKind.
bool	useAppleExtensionAttributes () const
bool	useSplitDwarf () const
	Returns whether or not to change the current debug info for the split dwarf proposal support.
bool	useSegmentedStringOffsetsTable () const
	Returns whether to generate a string offsets table with (possibly shared) contributions from each CU and type unit.
bool	emitDebugEntryValues () const
bool	useOpConvert () const
bool	shareAcrossDWOCUs () const
uint16_t	getDwarfVersion () const
	Returns the Dwarf Version.
dwarf::Form	getDwarfSectionOffsetForm () const
	Returns a suitable DWARF form to represent a section offset, i.e.
const DwarfCompileUnit *	getPrevCU () const
	Returns the previous CU that was being updated.
void	setPrevCU (const DwarfCompileUnit *PrevCU)
void	terminateLineTable (const DwarfCompileUnit *CU)
	Terminate the line table by adding the last range label.
const DebugLocStream &	getDebugLocs () const
	Returns the entries for the .debug_loc section.
void	emitDebugLocEntry (ByteStreamer &Streamer, const DebugLocStream::Entry &Entry, const DwarfCompileUnit *CU)
	Emit an entry for the debug loc section.
void	emitDebugLocEntryLocation (const DebugLocStream::Entry &Entry, const DwarfCompileUnit *CU)
	Emit the location for a debug loc entry, including the size header.
void	addSubprogramNames (const DwarfUnit &Unit, const DICompileUnit::DebugNameTableKind NameTableKind, const DISubprogram *SP, DIE &Die)
AddressPool &	getAddressPool ()
void	addAccelName (const DwarfUnit &Unit, const DICompileUnit::DebugNameTableKind NameTableKind, StringRef Name, const DIE &Die)
void	addAccelObjC (const DwarfUnit &Unit, const DICompileUnit::DebugNameTableKind NameTableKind, StringRef Name, const DIE &Die)
void	addAccelNamespace (const DwarfUnit &Unit, const DICompileUnit::DebugNameTableKind NameTableKind, StringRef Name, const DIE &Die)
void	addAccelType (const DwarfUnit &Unit, const DICompileUnit::DebugNameTableKind NameTableKind, StringRef Name, const DIE &Die, char Flags)
const MachineFunction *	getCurrentFunction () const
bool	isLexicalScopeDIENull (LexicalScope *Scope)
	A helper function to check whether the DIE for a given Scope is going to be null.
DwarfCompileUnit *	lookupCU (const DIE *Die)
	Find the matching DwarfCompileUnit for the given CU DIE.
const DwarfCompileUnit *	lookupCU (const DIE *Die) const
unsigned	getStringTypeLoc (const DIStringType *ST) const
void	addStringTypeLoc (const DIStringType *ST, unsigned Loc)
bool	tuneForGDB () const
bool	tuneForLLDB () const
bool	tuneForSCE () const
bool	tuneForDBX () const
const MCSymbol *	getSectionLabel (const MCSection *S)
void	insertSectionLabel (const MCSymbol *S)
std::optional< MD5::MD5Result >	getMD5AsBytes (const DIFile *File) const
	If the File has an MD5 checksum, return it as an MD5Result allocated in the MCContext.
MDNodeSet &	getLocalDeclsForScope (const DILocalScope *S)
void	setCurrentDWARF5AccelTable (const DWARF5AccelTableKind Kind)
	Sets the current DWARF5AccelTable to use.
DWARF5AccelTable &	getCurrentDWARF5AccelTable ()
	Returns either CU or TU DWARF5AccelTable.
Public Member Functions inherited from llvm::DebugHandlerBase
virtual	~DebugHandlerBase () override
void	beginModule (Module *M) override
void	beginInstruction (const MachineInstr *MI) override
	Process beginning of an instruction.
void	endInstruction () override
	Process end of an instruction.
void	beginFunction (const MachineFunction *MF) override
	Gather pre-function debug information.
void	endFunction (const MachineFunction *MF) override
	Gather post-function debug information.
void	beginBasicBlockSection (const MachineBasicBlock &MBB) override
	Process the beginning of a new basic-block-section within a function.
void	endBasicBlockSection (const MachineBasicBlock &MBB) override
	Process the end of a basic-block-section within a function.
MCSymbol *	getLabelBeforeInsn (const MachineInstr *MI)
	Return Label preceding the instruction.
MCSymbol *	getLabelAfterInsn (const MachineInstr *MI)
	Return Label immediately following the instruction.
const InstructionOrdering &	getInstOrdering () const
Public Member Functions inherited from llvm::AsmPrinterHandler
virtual	~AsmPrinterHandler ()
	Pin vtables to this file.
virtual void	beginModule (Module *M)
virtual void	endModule ()=0
	Emit all sections that should come after the content.
virtual void	beginFunction (const MachineFunction *MF)=0
	Gather pre-function debug information.
virtual void	markFunctionEnd ()
virtual void	endFunction (const MachineFunction *MF)=0
	Gather post-function debug information.
virtual void	beginBasicBlockSection (const MachineBasicBlock &MBB)
	Process the beginning of a new basic-block-section within a function.
virtual void	endBasicBlockSection (const MachineBasicBlock &MBB)
	Process the end of a basic-block-section within a function.
virtual void	setSymbolSize (const MCSymbol *Sym, uint64_t Size)
	For symbols that have a size designated (e.g.
virtual void	beginInstruction (const MachineInstr *MI)
	Process beginning of an instruction.
virtual void	endInstruction ()
	Process end of an instruction.
virtual void	beginCodeAlignment (const MachineBasicBlock &MBB)
virtual void	beginFunclet (const MachineBasicBlock &MBB, MCSymbol *Sym=nullptr)
	Emit target-specific EH funclet machinery.
virtual void	endFunclet ()

Static Public Member Functions
static uint64_t	makeTypeSignature (StringRef Identifier)
	Perform an MD5 checksum of Identifier and return the lower 64 bits.
static void	emitDebugLocValue (const AsmPrinter &AP, const DIBasicType *BT, const DbgValueLoc &Value, DwarfExpression &DwarfExpr)
Static Public Member Functions inherited from llvm::DebugHandlerBase
static uint64_t	getBaseTypeSize (const DIType *Ty)
	If this type is derived from a base type then return base type size.
static bool	isUnsignedDIType (const DIType *Ty)
	Return true if type encoding is unsigned.

Protected Member Functions
void	beginFunctionImpl (const MachineFunction *MF) override
	Gather pre-function debug information.
void	endFunctionImpl (const MachineFunction *MF) override
	Gather and emit post-function debug information.
unsigned	getDwarfCompileUnitIDForLineTable (const DwarfCompileUnit &CU)
	Get Dwarf compile unit ID for line table.
void	skippedNonDebugFunction () override
Protected Member Functions inherited from llvm::DebugHandlerBase
	DebugHandlerBase (AsmPrinter *A)
void	identifyScopeMarkers ()
	Indentify instructions that are marking the beginning of or ending of a scope.
void	requestLabelBeforeInsn (const MachineInstr *MI)
	Ensure that a label will be emitted before MI.
void	requestLabelAfterInsn (const MachineInstr *MI)
	Ensure that a label will be emitted after MI.
virtual void	beginFunctionImpl (const MachineFunction *MF)=0
virtual void	endFunctionImpl (const MachineFunction *MF)=0
virtual void	skippedNonDebugFunction ()

Additional Inherited Members
Protected Attributes inherited from llvm::DebugHandlerBase
AsmPrinter *	Asm = nullptr
	Target of debug info emission.
MachineModuleInfo *	MMI = nullptr
	Collected machine module information.
DebugLoc	PrevInstLoc
	Previous instruction's location information.
MCSymbol *	PrevLabel = nullptr
const MachineBasicBlock *	PrevInstBB = nullptr
const MachineInstr *	PrologEndLoc
	This location indicates end of function prologue and beginning of function body.
const MachineBasicBlock *	EpilogBeginBlock = nullptr
	This block includes epilogue instructions.
const MachineInstr *	CurMI = nullptr
	If nonnull, stores the current machine instruction we're processing.
LexicalScopes	LScopes
DbgValueHistoryMap	DbgValues
	History of DBG_VALUE and clobber instructions for each user variable.
DbgLabelInstrMap	DbgLabels
	Mapping of inlined labels and DBG_LABEL machine instruction.
DenseMap< const MachineInstr *, MCSymbol * >	LabelsBeforeInsn
	Maps instruction with label emitted before instruction.
DenseMap< const MachineInstr *, MCSymbol * >	LabelsAfterInsn
	Maps instruction with label emitted after instruction.

Detailed Description

Collects and handles dwarf debug information.

Definition at line 351 of file DwarfDebug.h.

Member Enumeration Documentation

DWARF5AccelTableKind

enum class llvm::DwarfDebug::DWARF5AccelTableKind

strong

Enumerator
CU
TU

Definition at line 461 of file DwarfDebug.h.

MinimizeAddrInV5

enum class llvm::DwarfDebug::MinimizeAddrInV5

strong

Enumerator
Default
Disabled
Ranges
Expressions
Form

Definition at line 453 of file DwarfDebug.h.

Constructor & Destructor Documentation

DwarfDebug()

DwarfDebug::DwarfDebug

(

AsmPrinter *

A

)

Definition at line 330 of file DwarfDebug.cpp.

References A, AllLinkageNames, llvm::DebugHandlerBase::Asm, computeAccelTableKind(), llvm::DBX, llvm::TargetOptions::DebuggerTuning, llvm::Default, Default, DefaultLinkageNames, llvm::dwarf::DWARF32, llvm::dwarf::DWARF64, llvm::MCTargetOptions::Dwarf64, llvm::dwarf::DWARF_VERSION, DwarfInlinedStrings, DwarfLinkageNames, DwarfOpConvert, DwarfSectionsAsReferences, llvm::MCTargetOptions::DwarfVersion, llvm::Enable, llvm::GDB, GenerateARangeSection, GenerateDwarfTypeUnits, llvm::Module::getDwarfVersion(), llvm::MachineModuleInfo::getModule(), llvm::TargetMachine::getTargetTriple(), llvm::Module::isDwarf64(), llvm::LLDB, llvm::TargetOptions::MCOptions, MinimizeAddrInV5Option, llvm::DebugHandlerBase::MMI, NoDwarfRangesSection, llvm::TargetMachine::Options, llvm::AsmPrinter::OutStreamer, llvm::report_fatal_error(), llvm::SCE, llvm::TargetOptions::ShouldEmitDebugEntryValues(), llvm::MCTargetOptions::SplitDwarfFile, llvm::AsmPrinter::TM, tuneForDBX(), tuneForGDB(), tuneForLLDB(), tuneForSCE(), UseGNUDebugMacro, and useSplitDwarf().

~DwarfDebug()

DwarfDebug::~DwarfDebug ( )

overridedefault

Member Function Documentation

addAccelName()

void DwarfDebug::addAccelName	(	const DwarfUnit &	Unit,
		const DICompileUnit::DebugNameTableKind	NameTableKind,
		StringRef	Name,
		const DIE &	Die
	)

Definition at line 3865 of file DwarfDebug.cpp.

References Name.

Referenced by llvm::DwarfCompileUnit::addLocationAttribute(), addSubprogramNames(), and llvm::DwarfCompileUnit::finishEntityDefinition().

addAccelNamespace()

void DwarfDebug::addAccelNamespace	(	const DwarfUnit &	Unit,
		const DICompileUnit::DebugNameTableKind	NameTableKind,
		StringRef	Name,
		const DIE &	Die
	)

Definition at line 3881 of file DwarfDebug.cpp.

References Name.

Referenced by llvm::DwarfCompileUnit::constructImportedEntityDIE(), and llvm::DwarfUnit::getOrCreateNameSpace().

addAccelObjC()

void DwarfDebug::addAccelObjC	(	const DwarfUnit &	Unit,
		const DICompileUnit::DebugNameTableKind	NameTableKind,
		StringRef	Name,
		const DIE &	Die
	)

Definition at line 3872 of file DwarfDebug.cpp.

References llvm::Apple, getAccelTableKind(), and Name.

Referenced by addSubprogramNames().

addAccelType()

void DwarfDebug::addAccelType	(	const DwarfUnit &	Unit,
		const DICompileUnit::DebugNameTableKind	NameTableKind,
		StringRef	Name,
		const DIE &	Die,
		char	Flags
	)

Definition at line 3888 of file DwarfDebug.cpp.

References Name.

Referenced by llvm::DwarfUnit::updateAcceleratorTables().

addArangeLabel()

void llvm::DwarfDebug::addArangeLabel ( SymbolCU  SCU )

inline

Add a label so that arange data can be generated for it.

Definition at line 751 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::addLabelAddress(), llvm::DwarfCompileUnit::addLocationAttribute(), and endFunctionImpl().

addDwarfTypeUnitType()

void DwarfDebug::addDwarfTypeUnitType	(	DwarfCompileUnit &	CU,
		StringRef	Identifier,
		DIE &	Die,
		const DICompositeType *	CTy
	)

Add a DIE to the set of types that we're going to pull into type units.

Definition at line 3707 of file DwarfDebug.cpp.

References llvm::DwarfUnit::addString(), llvm::DwarfUnit::addStringOffsetsStart(), llvm::DWARF5AccelTable::addTypeEntries(), llvm::DWARF5AccelTable::addTypeUnitSignature(), llvm::DWARF5AccelTable::addTypeUnitSymbol(), llvm::DwarfUnit::addUInt(), llvm::DebugHandlerBase::Asm, llvm::AccelTable< DataT >::clear(), llvm::DwarfFile::computeSizeAndOffsetsForUnit(), llvm::DWARF5AccelTable::convertDieToOffset(), llvm::DwarfUnit::createTypeDIE(), CU, llvm::Dwarf, llvm::DwarfFile::emitUnit(), llvm::StringRef::empty(), getAccelTableKind(), llvm::MCObjectFileInfo::getDwarfInfoDWOSection(), llvm::MCObjectFileInfo::getDwarfInfoSection(), llvm::MCObjectFileInfo::getDwarfTypesDWOSection(), llvm::MCObjectFileInfo::getDwarfTypesSection(), getDwarfVersion(), llvm::AsmPrinter::getObjFileLowering(), llvm::DIType::getScope(), llvm::DIEUnit::getUnitDie(), llvm::AddressPool::hasBeenUsed(), makeTypeSignature(), llvm::TargetOptions::MCOptions, llvm::TargetMachine::Options, llvm::AddressPool::resetUsedFlag(), setCurrentDWARF5AccelTable(), llvm::DIEUnit::setSection(), llvm::DwarfTypeUnit::setType(), llvm::DwarfTypeUnit::setTypeSignature(), llvm::MCTargetOptions::SplitDwarfFile, llvm::AsmPrinter::TM, TU, useSegmentedStringOffsetsTable(), and useSplitDwarf().

Referenced by llvm::DwarfUnit::createTypeDIE().

addStringTypeLoc()

void llvm::DwarfDebug::addStringTypeLoc ( const DIStringType *  ST, unsigned  Loc  )

inline

Definition at line 904 of file DwarfDebug.h.

References assert().

addSubprogramNames()

void DwarfDebug::addSubprogramNames	(	const DwarfUnit &	Unit,
		const DICompileUnit::DebugNameTableKind	NameTableKind,
		const DISubprogram *	SP,
		DIE &	Die
	)

Definition at line 477 of file DwarfDebug.cpp.

References addAccelName(), addAccelObjC(), llvm::DICompileUnit::Apple, llvm::Apple, llvm::DwarfFile::getAbstractScopeDIEs(), getAccelTableKind(), llvm::DIScope::getName(), getObjCClassCategory(), getObjCMethodName(), isObjCClass(), llvm::DICompileUnit::None, and useAllLinkageNames().

Referenced by llvm::DwarfCompileUnit::constructInlinedScopeDIE(), and llvm::DwarfCompileUnit::updateSubprogramScopeDIE().

alwaysUseRanges()

bool DwarfDebug::alwaysUseRanges

(

const DwarfCompileUnit &

CU

)

const

Returns whether range encodings should be used for single entry range lists.

Definition at line 3936 of file DwarfDebug.cpp.

References Default, Ranges, and useSplitDwarf().

Referenced by llvm::DwarfCompileUnit::attachRangesOrLowHighPC().

beginCodeAlignment()

void DwarfDebug::beginCodeAlignment ( const MachineBasicBlock &  MBB )

overridevirtual

Process beginning of code alignment.

Reimplemented from llvm::AsmPrinterHandler.

Definition at line 3946 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, llvm::MachineBasicBlock::getAlignment(), llvm::MachineFunction::getFunction(), llvm::MachineBasicBlock::getParent(), llvm::Function::getSubprogram(), llvm::MCDwarfLineEntry::make(), MBB, llvm::DICompileUnit::NoDebug, and llvm::AsmPrinter::OutStreamer.

beginFunctionImpl()

void DwarfDebug::beginFunctionImpl ( const MachineFunction *  MF )

overrideprotectedvirtual

Gather pre-function debug information.

Implements llvm::DebugHandlerBase.

Definition at line 2469 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, assert(), emitInitialLocDirective(), llvm::LexicalScopes::empty(), llvm::LexicalScopes::getCurrentFunctionScope(), getDwarfCompileUnitIDForLineTable(), llvm::MachineFunction::getFunction(), llvm::LexicalScope::getScopeNode(), llvm::Function::getSubprogram(), llvm::DebugHandlerBase::LScopes, llvm::DICompileUnit::NoDebug, llvm::AsmPrinter::OutStreamer, and llvm::DebugHandlerBase::PrologEndLoc.

beginInstruction()

void DwarfDebug::beginInstruction ( const MachineInstr *  MI )

overridevirtual

Process beginning of an instruction.

Reimplemented from llvm::DebugHandlerBase.

Definition at line 2000 of file DwarfDebug.cpp.

References llvm::MachineInstr::AnyInBundle, llvm::DebugHandlerBase::Asm, assert(), llvm::DebugHandlerBase::beginInstruction(), llvm::DebugHandlerBase::CurMI, llvm::Disable, DL, DWARF2_FLAG_EPILOGUE_BEGIN, DWARF2_FLAG_IS_STMT, DWARF2_FLAG_PROLOGUE_END, llvm::Enable, llvm::DebugHandlerBase::EpilogBeginBlock, llvm::MachineInstr::FrameDestroy, llvm::MachineInstr::FrameSetup, llvm::DebugLoc::getCol(), llvm::MachineFunction::getFunction(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::DebugLoc::getLine(), llvm::DebugLoc::getScope(), llvm::MachineBasicBlock::getSectionID(), llvm::Function::getSubprogram(), llvm::MachineFunction::getSubtarget(), llvm::HexagonInstrInfo::isTailCall(), MBB, MI, llvm::DICompileUnit::NoDebug, llvm::AsmPrinter::OutStreamer, llvm::DebugHandlerBase::PrevInstBB, llvm::DebugHandlerBase::PrevInstLoc, llvm::DebugHandlerBase::PrevLabel, llvm::DebugHandlerBase::PrologEndLoc, llvm::DebugHandlerBase::requestLabelAfterInsn(), llvm::DebugHandlerBase::requestLabelBeforeInsn(), TII, and UnknownLocations.

beginModule()

void DwarfDebug::beginModule ( Module *  M )

overridevirtual

Emit all Dwarf sections that should come prior to the content.

Reimplemented from llvm::DebugHandlerBase.

Definition at line 1145 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, assert(), llvm::DebugHandlerBase::beginModule(), llvm::AsmPrinter::createTempSymbol(), getDwarfVersion(), llvm::Global, llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::AddressPool::setLabel(), llvm::DwarfFile::setRnglistsTableBaseSym(), llvm::DebugLocStream::setSym(), sortGlobalExprs(), useSegmentedStringOffsetsTable(), and useSplitDwarf().

emitDebugEntryValues()

bool llvm::DwarfDebug::emitDebugEntryValues ( ) const

inline

Definition at line 827 of file DwarfDebug.h.

emitDebugLocEntry()

void DwarfDebug::emitDebugLocEntry	(	ByteStreamer &	Streamer,
		const DebugLocStream::Entry &	Entry,
		const DwarfCompileUnit *	CU
	)

Emit an entry for the debug loc section.

This can be used to handle an entry that's going to be emitted into the debug loc section.

Definition at line 2852 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, assert(), llvm::ArrayRef< T >::data(), llvm::Data, llvm::ByteStreamer::emitDIERef(), llvm::ByteStreamer::emitInt8(), End, llvm::DebugLocStream::getBytes(), llvm::DWARFExpression::Operation::getCode(), llvm::MCAsmInfo::getCodePointerSize(), llvm::DebugLocStream::getComments(), llvm::AsmPrinter::getDataLayout(), llvm::DWARFExpression::Operation::getDescription(), llvm::MCContext::getDwarfFormat(), llvm::DWARFExpression::Operation::getEndOffset(), llvm::DWARFExpression::Operation::getOperandEndOffset(), llvm::DWARFExpression::Operation::getRawOperand(), llvm::DWARFExpression::Operation::getSubCode(), I, llvm::DataLayout::isLittleEndian(), llvm::Length, llvm::AsmPrinter::MAI, llvm::Offset, llvm::DWARFExpression::Operation::Description::Op, llvm::AsmPrinter::OutContext, and llvm::ArrayRef< T >::size().

Referenced by emitDebugLocEntryLocation().

emitDebugLocEntryLocation()

void DwarfDebug::emitDebugLocEntryLocation	(	const DebugLocStream::Entry &	Entry,
		const DwarfCompileUnit *	CU
	)

Emit the location for a debug loc entry, including the size header.

Definition at line 3021 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, emitDebugLocEntry(), llvm::AsmPrinter::emitInt16(), llvm::AsmPrinter::emitULEB128(), llvm::DebugLocStream::getBytes(), getDwarfVersion(), llvm::AsmPrinter::OutStreamer, and llvm::ArrayRef< T >::size().

emitDebugLocValue()

void DwarfDebug::emitDebugLocValue ( const AsmPrinter &  AP, const DIBasicType *  BT, const DbgValueLoc &  Value, DwarfExpression &  DwarfExpr  )

static

Definition at line 2896 of file DwarfDebug.cpp.

References llvm::DwarfExpression::addConstantFP(), llvm::DwarfExpression::addExpression(), llvm::DwarfExpression::addFragmentOffset(), llvm::DwarfExpression::addMachineRegExpression(), llvm::DwarfExpression::addSignedConstant(), llvm::DwarfExpression::addUnsignedConstant(), llvm::DwarfExpression::addWasmLocation(), llvm::any_of(), assert(), llvm::DwarfExpression::beginEntryValueExpression(), llvm::dbgs(), llvm::AsmPrinter::getDwarfDebug(), llvm::AsmPrinter::getDwarfVersion(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), llvm::TargetMachine::getTargetTriple(), Idx, llvm::TargetIndexLocation::Index, llvm::Triple::isWasm(), LLVM_DEBUG, llvm::AsmPrinter::MF, llvm::TargetIndexLocation::Offset, llvm::DwarfExpression::setLocation(), llvm::DwarfExpression::setMemoryLocationKind(), llvm::AsmPrinter::TM, TRI, and tuneForSCE().

Referenced by llvm::DwarfCompileUnit::constructCallSiteParmEntryDIEs(), and llvm::DebugLocEntry::finalize().

emitInitialLocDirective()

const MachineInstr * DwarfDebug::emitInitialLocDirective	(	const MachineFunction &	MF,
		unsigned	CUID
	)

Emits inital debug location directive.

Returns instruction at which the function prologue ends.

Definition at line 2293 of file DwarfDebug.cpp.

References llvm::all_of(), llvm::DebugHandlerBase::Asm, DL, DWARF2_FLAG_IS_STMT, llvm::MachineBasicBlock::empty(), findPrologueEndLoc(), llvm::MachineInstr::getDebugLoc(), getDwarfVersion(), llvm::MachineFunction::getFunction(), llvm::Function::getSubprogram(), MBB, and llvm::DebugHandlerBase::PrologEndLoc.

Referenced by beginFunctionImpl(), and llvm::AsmPrinter::emitInitialRawDwarfLocDirective().

endFunctionImpl()

void DwarfDebug::endFunctionImpl ( const MachineFunction *  MF )

overrideprotectedvirtual

Gather and emit post-function debug information.

Implements llvm::DebugHandlerBase.

Definition at line 2525 of file DwarfDebug.cpp.

References addArangeLabel(), llvm::DwarfCompileUnit::addRange(), llvm::DebugHandlerBase::Asm, assert(), llvm::DwarfCompileUnit::constructSubprogramScopeDIE(), llvm::DwarfCompileUnit::createAbstractEntity(), llvm::LexicalScopes::getAbstractScopesList(), llvm::DwarfUnit::getCUNode(), llvm::LexicalScopes::getCurrentFunctionScope(), llvm::DICompileUnit::getDebugInfoForProfiling(), llvm::DICompileUnit::getEmissionKind(), llvm::DwarfCompileUnit::getExistingAbstractEntity(), llvm::MachineFunction::getFunction(), llvm::LexicalScopes::getOrCreateAbstractScope(), getRetainedNodeScope(), llvm::DwarfFile::getScopeLabels(), llvm::LexicalScope::getScopeNode(), llvm::DwarfFile::getScopeVariables(), llvm::DwarfCompileUnit::getSkeleton(), llvm::DICompileUnit::getSplitDebugInlining(), llvm::Function::getSubprogram(), llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::DICompileUnit::isDebugDirectivesOnly(), llvm::DICompileUnit::LineTablesOnly, llvm::DebugHandlerBase::LScopes, llvm::AsmPrinter::MBBSectionRanges, llvm::AsmPrinter::OutStreamer, and llvm::DebugHandlerBase::PrevLabel.

endModule()

void DwarfDebug::endModule ( )

overridevirtual

Emit all Dwarf sections that should come after the content.

Implements llvm::AsmPrinterHandler.

Definition at line 1405 of file DwarfDebug.cpp.

References llvm::Apple, llvm::DebugHandlerBase::Asm, assert(), llvm::DebugHandlerBase::CurMI, D, llvm::Default, llvm::Dwarf, getAccelTableKind(), llvm::AsmPrinter::hasDebugInfo(), llvm_unreachable, llvm::None, P, terminateLineTable(), and useSplitDwarf().

generateTypeUnits()

bool llvm::DwarfDebug::generateTypeUnits ( ) const

inline

Returns whether to generate DWARF v4 type units.

Definition at line 799 of file DwarfDebug.h.

Referenced by llvm::DwarfUnit::createTypeDIE(), and llvm::DwarfUnit::isShareableAcrossCUs().

getAccelTableKind()

AccelTableKind llvm::DwarfDebug::getAccelTableKind ( ) const

inline

Returns what kind (if any) of accelerator tables to emit.

Definition at line 804 of file DwarfDebug.h.

Referenced by addAccelObjC(), addDwarfTypeUnitType(), addSubprogramNames(), endModule(), and llvm::DwarfCompileUnit::hasDwarfPubSections().

getAddressPool()

AddressPool & llvm::DwarfDebug::getAddressPool ( )

inline

Definition at line 870 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::addAddrTableBase(), llvm::DwarfCompileUnit::addLabelAddress(), llvm::DwarfCompileUnit::addLocationAttribute(), llvm::DwarfUnit::addPoolOpAddress(), and emitRangeList().

getCurrentDWARF5AccelTable()

DWARF5AccelTable & llvm::DwarfDebug::getCurrentDWARF5AccelTable ( )

inline

Returns either CU or TU DWARF5AccelTable.

Definition at line 946 of file DwarfDebug.h.

getCurrentFunction()

const MachineFunction * llvm::DwarfDebug::getCurrentFunction ( ) const

inline

Definition at line 888 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::updateSubprogramScopeDIE().

getDebugLocs()

const DebugLocStream & llvm::DwarfDebug::getDebugLocs ( ) const

inline

Returns the entries for the .debug_loc section.

Definition at line 854 of file DwarfDebug.h.

Referenced by emitLocList(), emitLoclistsTableHeader(), and llvm::DIELocList::emitValue().

getDwarfCompileUnitIDForLineTable()

unsigned DwarfDebug::getDwarfCompileUnitIDForLineTable ( const DwarfCompileUnit &  CU )

protected

Get Dwarf compile unit ID for line table.

Definition at line 2493 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, and llvm::AsmPrinter::OutStreamer.

Referenced by beginFunctionImpl(), and terminateLineTable().

getDwarfSectionOffsetForm()

dwarf::Form DwarfDebug::getDwarfSectionOffsetForm

(

)

const

Returns a suitable DWARF form to represent a section offset, i.e.

• DW_FORM_sec_offset for DWARF version >= 4;
• DW_FORM_data8 for 64-bit DWARFv3;
• DW_FORM_data4 for 32-bit DWARFv3 and DWARFv2.

Definition at line 3899 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, assert(), llvm::AsmPrinter::getDwarfVersion(), and llvm::AsmPrinter::isDwarf64().

Referenced by llvm::DwarfCompileUnit::addLocationList(), llvm::DwarfUnit::addSectionDelta(), llvm::DwarfUnit::addSectionLabel(), and llvm::DwarfUnit::addSectionOffset().

getDwarfVersion()

uint16_t DwarfDebug::getDwarfVersion

(

)

const

Returns the Dwarf Version.

Definition at line 3895 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, and llvm::AsmPrinter::OutStreamer.

Referenced by llvm::DwarfCompileUnit::addAddrTableBase(), llvm::DwarfUnit::addAttribute(), llvm::DwarfUnit::addBlock(), addDwarfTypeUnitType(), llvm::DwarfUnit::addFlag(), llvm::DwarfCompileUnit::addLabelAddress(), llvm::DwarfUnit::addLinkageName(), llvm::DwarfCompileUnit::addLocationList(), llvm::DwarfUnit::addOpAddress(), llvm::DwarfUnit::addPoolOpAddress(), llvm::DwarfUnit::addRnglistsBase(), llvm::DwarfCompileUnit::addScopeRangeList(), llvm::DwarfUnit::applySubprogramAttributes(), llvm::DwarfCompileUnit::attachLowHighPC(), beginModule(), llvm::DwarfCompileUnit::constructAbstractSubprogramScopeDIE(), llvm::DwarfCompileUnit::constructInlinedScopeDIE(), llvm::DwarfUnit::constructTypeDIE(), llvm::DwarfUnit::emitCommonHeader(), emitDebugLocEntryLocation(), llvm::DwarfCompileUnit::emitHeader(), emitInitialLocDirective(), emitRangeList(), GetCompileUnitType(), llvm::DwarfUnit::getHeaderSize(), llvm::DwarfCompileUnit::getHeaderSize(), getMD5AsBytes(), llvm::DwarfUnit::getOrCreateTypeDIE(), llvm::DwarfCompileUnit::hasDwarfPubSections(), insertSectionLabel(), and llvm::DwarfCompileUnit::useGNUAnalogForDwarf5Feature().

getLocalDeclsForScope()

MDNodeSet & llvm::DwarfDebug::getLocalDeclsForScope ( const DILocalScope *  S )

inline

Definition at line 931 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::createAndAddScopeChildren().

getMD5AsBytes()

std::optional< MD5::MD5Result > DwarfDebug::getMD5AsBytes

(

const DIFile *

File

)

const

If the File has an MD5 checksum, return it as an MD5Result allocated in the MCContext.

Definition at line 3919 of file DwarfDebug.cpp.

References assert(), llvm::DIFile::CSK_MD5, and getDwarfVersion().

Referenced by llvm::DwarfCompileUnit::getOrCreateSourceID().

getPrevCU()

const DwarfCompileUnit * llvm::DwarfDebug::getPrevCU ( ) const

inline

Returns the previous CU that was being updated.

Definition at line 847 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::addRange().

getSectionLabel()

const MCSymbol * DwarfDebug::getSectionLabel

(

const MCSection *

S

)

Definition at line 3908 of file DwarfDebug.cpp.

Referenced by llvm::DwarfCompileUnit::addLabelAddress(), llvm::DwarfUnit::addPoolOpAddress(), llvm::DwarfCompileUnit::attachRangesOrLowHighPC(), and emitRangeList().

getStringTypeLoc()

unsigned llvm::DwarfDebug::getStringTypeLoc ( const DIStringType *  ST ) const

inline

Definition at line 900 of file DwarfDebug.h.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::lookup().

insertSectionLabel()

void DwarfDebug::insertSectionLabel

(

const MCSymbol *

S

)

Definition at line 3912 of file DwarfDebug.cpp.

References getDwarfVersion(), llvm::AddressPool::getIndex(), llvm::MCSymbol::getSection(), and useSplitDwarf().

Referenced by llvm::DwarfCompileUnit::addRange().

isLexicalScopeDIENull()

bool DwarfDebug::isLexicalScopeDIENull

(

LexicalScope *

Scope

)

A helper function to check whether the DIE for a given Scope is going to be null.

Check whether we should create a DIE for the given Scope, return true if we don't create a DIE (the corresponding DIE is null).

Definition at line 514 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::getLabelAfterInsn(), and Ranges.

Referenced by llvm::DwarfCompileUnit::constructLexicalScopeDIE(), and llvm::DwarfCompileUnit::constructScopeDIE().

lookupCU() [1/2]

DwarfCompileUnit * llvm::DwarfDebug::lookupCU ( const DIE *  Die )

inline

Find the matching DwarfCompileUnit for the given CU DIE.

Definition at line 895 of file DwarfDebug.h.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::lookup().

Referenced by llvm::DwarfCompileUnit::constructAbstractSubprogramScopeDIE().

lookupCU() [2/2]

const DwarfCompileUnit * llvm::DwarfDebug::lookupCU ( const DIE *  Die ) const

inline

Definition at line 896 of file DwarfDebug.h.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::lookup().

makeTypeSignature()

uint64_t DwarfDebug::makeTypeSignature ( StringRef  Identifier )

static

Perform an MD5 checksum of Identifier and return the lower 64 bits.

Definition at line 3696 of file DwarfDebug.cpp.

References llvm::MD5::final(), and llvm::MD5::update().

Referenced by addDwarfTypeUnitType().

setCurrentDWARF5AccelTable()

void llvm::DwarfDebug::setCurrentDWARF5AccelTable ( const DWARF5AccelTableKind  Kind )

inline

Sets the current DWARF5AccelTable to use.

Definition at line 936 of file DwarfDebug.h.

References CU, and TU.

Referenced by addDwarfTypeUnitType().

setPrevCU()

void llvm::DwarfDebug::setPrevCU ( const DwarfCompileUnit *  PrevCU )

inline

Definition at line 848 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::addRange().

setSymbolSize()

void llvm::DwarfDebug::setSymbolSize ( const MCSymbol *  Sym, uint64_t  Size  )

inlineoverridevirtual

For symbols that have a size designated (e.g.

common symbols), this tracks that size.

Reimplemented from llvm::AsmPrinterHandler.

Definition at line 755 of file DwarfDebug.h.

References Size, and Sym.

setTheAccelTableKind()

void llvm::DwarfDebug::setTheAccelTableKind ( AccelTableKind  K )

inline

Seet TheAccelTableKind.

Definition at line 807 of file DwarfDebug.h.

shareAcrossDWOCUs()

bool DwarfDebug::shareAcrossDWOCUs

(

)

const

Definition at line 538 of file DwarfDebug.cpp.

References SplitDwarfCrossCuReferences.

Referenced by llvm::DwarfUnit::addDIEEntry(), and llvm::DwarfUnit::isShareableAcrossCUs().

skippedNonDebugFunction()

void DwarfDebug::skippedNonDebugFunction ( )

overrideprotectedvirtual

Reimplemented from llvm::DebugHandlerBase.

Definition at line 2513 of file DwarfDebug.cpp.

References terminateLineTable().

terminateLineTable()

void DwarfDebug::terminateLineTable

(

const DwarfCompileUnit *

CU

)

Terminate the line table by adding the last range label.

Definition at line 2504 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, getDwarfCompileUnitIDForLineTable(), and llvm::AsmPrinter::OutStreamer.

Referenced by llvm::DwarfCompileUnit::addRange(), endModule(), and skippedNonDebugFunction().

useAddrOffsetExpressions()

bool llvm::DwarfDebug::useAddrOffsetExpressions ( ) const

inline

Definition at line 783 of file DwarfDebug.h.

References Expressions.

Referenced by llvm::DwarfCompileUnit::addLabelAddress(), and llvm::DwarfUnit::addPoolOpAddress().

useAddrOffsetForm()

bool llvm::DwarfDebug::useAddrOffsetForm ( ) const

inline

Definition at line 789 of file DwarfDebug.h.

References Form.

Referenced by llvm::DwarfCompileUnit::addLabelAddress(), and llvm::DwarfUnit::addPoolOpAddress().

useAllLinkageNames()

bool llvm::DwarfDebug::useAllLinkageNames ( ) const

inline

Returns whether we should emit all DW_AT_[MIPS_]linkage_name.

If not, we still might emit certain cases.

Definition at line 761 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::addLocationAttribute(), addSubprogramNames(), and llvm::DwarfUnit::applySubprogramDefinitionAttributes().

useAppleExtensionAttributes()

bool llvm::DwarfDebug::useAppleExtensionAttributes ( ) const

inline

Definition at line 809 of file DwarfDebug.h.

Referenced by llvm::DwarfUnit::applySubprogramAttributes(), and llvm::DwarfCompileUnit::updateSubprogramScopeDIE().

useDWARF2Bitfields()

bool llvm::DwarfDebug::useDWARF2Bitfields ( ) const

inline

Returns whether to use the DWARF2 format for bitfields instyead of the DWARF4 format.

Definition at line 769 of file DwarfDebug.h.

useGNUTLSOpcode()

bool llvm::DwarfDebug::useGNUTLSOpcode ( ) const

inline

Returns whether to use DW_OP_GNU_push_tls_address, instead of the standard DW_OP_form_tls_address opcode.

Definition at line 765 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::addLocationAttribute().

useInlineStrings()

bool llvm::DwarfDebug::useInlineStrings ( ) const

inline

Returns whether to use inline strings.

Definition at line 772 of file DwarfDebug.h.

Referenced by llvm::DwarfUnit::addString().

useOpConvert()

bool llvm::DwarfDebug::useOpConvert ( ) const

inline

Definition at line 831 of file DwarfDebug.h.

useRangesSection()

bool llvm::DwarfDebug::useRangesSection ( ) const

inline

Returns whether ranges section should be emitted.

Definition at line 775 of file DwarfDebug.h.

Referenced by llvm::DwarfCompileUnit::attachRangesOrLowHighPC().

useSectionsAsReferences()

bool llvm::DwarfDebug::useSectionsAsReferences ( ) const

inline

Returns whether to use sections as labels rather than temp symbols.

Definition at line 794 of file DwarfDebug.h.

Referenced by llvm::DwarfUnit::emitCommonHeader(), llvm::DwarfCompileUnit::emitHeader(), and llvm::DwarfCompileUnit::initStmtList().

useSegmentedStringOffsetsTable()

bool llvm::DwarfDebug::useSegmentedStringOffsetsTable ( ) const

inline

Returns whether to generate a string offsets table with (possibly shared) contributions from each CU and type unit.

This implies the use of DW_FORM_strx* indirect references with DWARF v5 and beyond. Note that DW_FORM_GNU_str_index is also an indirect reference, but it is used with a pre-DWARF v5 implementation of split DWARF sections, which uses a monolithic string offsets table.

Definition at line 823 of file DwarfDebug.h.

Referenced by addDwarfTypeUnitType(), beginModule(), and llvm::DwarfUnit::useSegmentedStringOffsetsTable().

useSplitDwarf()

bool llvm::DwarfDebug::useSplitDwarf ( ) const

inline

Returns whether or not to change the current debug info for the split dwarf proposal support.

Definition at line 815 of file DwarfDebug.h.

Referenced by llvm::DwarfUnit::addDIEEntry(), addDwarfTypeUnitType(), llvm::DwarfCompileUnit::addLabelAddress(), llvm::DwarfCompileUnit::addLocationAttribute(), llvm::DwarfUnit::addOpAddress(), alwaysUseRanges(), beginModule(), DwarfDebug(), llvm::emitDWARF5AccelTable(), llvm::DwarfCompileUnit::emitHeader(), llvm::DwarfTypeUnit::emitHeader(), emitMacroHeader(), llvm::DIELocList::emitValue(), endModule(), llvm::DwarfCompileUnit::getHeaderSize(), llvm::DwarfCompileUnit::includeMinimalInlineScopes(), and insertSectionLabel().

---

The documentation for this class was generated from the following files:

• lib/CodeGen/AsmPrinter/DwarfDebug.h
• lib/CodeGen/AsmPrinter/DwarfDebug.cpp