Collect and emit BTF information. More...

#include "Target/BPF/BTFDebug.h"

Inheritance diagram for llvm::BTFDebug:

Public Member Functions
	BTFDebug (AsmPrinter *AP)

bool	InstLower (const MachineInstr *MI, MCInst &OutMI)
	Emit proper patchable instructions.

uint32_t	getArrayIndexTypeId ()
	Get the special array index type id.

size_t	addString (StringRef S)
	Add string to the string table.

uint32_t	getTypeId (const DIType *Ty)
	Get the type id for a particular DIType.

void	setSymbolSize (const MCSymbol *Symbol, uint64_t Size) override
	For symbols that have a size designated (e.g.

void	beginInstruction (const MachineInstr *MI) override
	Process beginning of an instruction.

void	endModule () override
	Complete all the types and emit the BTF sections.

Public Member Functions inherited from llvm::DebugHandlerBase
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 vtable to this file.

virtual void	setSymbolSize (const MCSymbol *Sym, uint64_t Size)=0
	For symbols that have a size designated (e.g.

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	beginFunclet (const MachineBasicBlock &MBB, MCSymbol *Sym=nullptr)
	Emit target-specific EH funclet machinery.

virtual void	endFunclet ()

virtual void	beginInstruction (const MachineInstr *MI)=0
	Process beginning of an instruction.

virtual void	endInstruction ()=0
	Process end of an instruction.

Protected Member Functions
void	beginFunctionImpl (const MachineFunction *MF) override
	Gather pre-function debug information.

void	endFunctionImpl (const MachineFunction *MF) override
	Post process after all instructions in this function are processed.

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
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 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

DebugLoc	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

Collect and emit BTF information.

Definition at line 289 of file BTFDebug.h.

Constructor & Destructor Documentation

◆ BTFDebug()

BTFDebug::BTFDebug ( AsmPrinter * AP )

Definition at line 507 of file BTFDebug.cpp.

References addString().

Member Function Documentation

◆ addString()

size_t llvm::BTFDebug::addString ( StringRef S )

inline

Add string to the string table.

Definition at line 413 of file BTFDebug.h.

◆ beginFunctionImpl()

void BTFDebug::beginFunctionImpl ( const MachineFunction * MF )

overrideprotectedvirtual

Gather pre-function debug information.

Implements llvm::DebugHandlerBase.

Definition at line 1164 of file BTFDebug.cpp.

References addString(), llvm::DebugHandlerBase::Asm, assert(), llvm::BTF::FUNC_GLOBAL, llvm::BTF::FUNC_STATIC, llvm::MachineFunction::getFunction(), llvm::AsmPrinter::getFunctionBegin(), llvm::MCSection::getName(), llvm::MCSymbol::getSection(), llvm::Function::getSubprogram(), llvm::MCSymbol::isInSection(), llvm::BTFFuncInfo::Label, llvm::DICompileUnit::NoDebug, and llvm::BTFFuncInfo::TypeId.

◆ beginInstruction()

void BTFDebug::beginInstruction ( const MachineInstr * MI )

overridevirtual

Process beginning of an instruction.

Reimplemented from llvm::DebugHandlerBase.

Definition at line 1312 of file BTFDebug.cpp.

References llvm::DebugHandlerBase::Asm, llvm::DebugHandlerBase::beginInstruction(), llvm::DebugHandlerBase::CurMI, DL, llvm::MachineInstr::FrameSetup, llvm::AsmPrinter::getFunctionBegin(), llvm::MachineOperand::getGlobal(), llvm::MachineOperand::getSymbolName(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isGlobal(), llvm::MachineOperand::isReg(), MI, OS, and llvm::DebugHandlerBase::PrevInstLoc.

◆ endFunctionImpl()

void BTFDebug::endFunctionImpl ( const MachineFunction * MF )

overrideprotectedvirtual

Post process after all instructions in this function are processed.

Implements llvm::DebugHandlerBase.

Definition at line 1240 of file BTFDebug.cpp.

◆ endModule()

void BTFDebug::endModule ( )

overridevirtual

Complete all the types and emit the BTF sections.

Implements llvm::AsmPrinterHandler.

Definition at line 1586 of file BTFDebug.cpp.

References Fixup, llvm::DIType::getName(), llvm::StructType::getName(), llvm::DINode::getTag(), and llvm::BTFTypeDerived::setPointeeType().

◆ getArrayIndexTypeId()

uint32_t llvm::BTFDebug::getArrayIndexTypeId ( )

inline

Get the special array index type id.

Definition at line 407 of file BTFDebug.h.

References assert().

Referenced by llvm::BTFTypeArray::completeType().

◆ getTypeId()

uint32_t llvm::BTFDebug::getTypeId ( const DIType * Ty )

inline

Get the type id for a particular DIType.

Definition at line 416 of file BTFDebug.h.

References assert().

Referenced by llvm::BTFTypeDerived::completeType(), llvm::BTFTypeStruct::completeType(), llvm::BTFTypeFuncProto::completeType(), and llvm::BTFTypeTypeTag::completeType().

◆ InstLower()

bool BTFDebug::InstLower	(	const MachineInstr *	MI,
		MCInst &	OutMI
	)

Emit proper patchable instructions.

Definition at line 1503 of file BTFDebug.cpp.

References llvm::MCInst::addOperand(), llvm::BPFCoreSharedInfo::AmaAttr, llvm::BTF::BTF_TYPE_ID_LOCAL, llvm::BTF::BTF_TYPE_ID_REMOTE, llvm::MCOperand::createImm(), llvm::MCOperand::createReg(), llvm::BTF::ENUM_VALUE, llvm::BTF::ENUM_VALUE_EXISTENCE, llvm::MachineOperand::getGlobal(), llvm::GlobalVariable::hasAttribute(), llvm::MachineOperand::isGlobal(), MI, llvm::MCInst::setOpcode(), and llvm::BPFCoreSharedInfo::TypeIdAttr.

◆ setSymbolSize()

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

inlineoverridevirtual

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

common symbols), this tracks that size.

Implements llvm::AsmPrinterHandler.

Definition at line 423 of file BTFDebug.h.

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

lib/Target/BPF/BTFDebug.h
lib/Target/BPF/BTFDebug.cpp

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ BTFDebug()

Member Function Documentation

◆ addString()

◆ beginFunctionImpl()

◆ beginInstruction()

◆ endFunctionImpl()

◆ endModule()

◆ getArrayIndexTypeId()

◆ getTypeId()

◆ InstLower()

◆ setSymbolSize()