llvm::BTFDebug Class Reference

Collect and emit BTF information. More...

#include "Target/BPF/BTFDebug.h"

Inheritance diagram for llvm::BTFDebug:

Collaboration diagram for llvm::BTFDebug:

Public Member Functions
	BTFDebug (AsmPrinter *AP)
uint32_t	getArrayIndexTypeId ()
	Get the special array index type id. More...
size_t	addString (StringRef S)
	Add string to the string table. More...
uint32_t	getTypeId (const DIType *Ty)
	Get the type id for a particular DIType. More...
void	setSymbolSize (const MCSymbol *Symbol, uint64_t Size) override
	For symbols that have a size designated (e.g. More...
void	beginInstruction (const MachineInstr *MI) override
	Process beginning of an instruction. More...
void	endModule () override
	Complete all the types and emit the BTF sections. More...
Public Member Functions inherited from llvm::DebugHandlerBase
void	endInstruction () override
	Process end of an instruction. More...
void	beginFunction (const MachineFunction *MF) override
	Gather pre-function debug information. More...
void	endFunction (const MachineFunction *MF) override
	Gather post-function debug information. More...
MCSymbol *	getLabelBeforeInsn (const MachineInstr *MI)
	Return Label preceding the instruction. More...
MCSymbol *	getLabelAfterInsn (const MachineInstr *MI)
	Return Label immediately following the instruction. More...
const MCExpr *	getFunctionLocalOffsetAfterInsn (const MachineInstr *MI)
	Return the function-local offset of an instruction. More...
Public Member Functions inherited from llvm::AsmPrinterHandler
virtual	~AsmPrinterHandler ()
	Pin vtable to this file. More...
virtual void	markFunctionEnd ()
virtual void	beginFragment (const MachineBasicBlock *MBB, ExceptionSymbolProvider ESP)
virtual void	endFragment ()
virtual void	beginFunclet (const MachineBasicBlock &MBB, MCSymbol *Sym=nullptr)
	Emit target-specific EH funclet machinery. More...
virtual void	endFunclet ()

Protected Member Functions
void	beginFunctionImpl (const MachineFunction *MF) override
	Gather pre-function debug information. More...
void	endFunctionImpl (const MachineFunction *MF) override
	Post process after all instructions in this function are processed. More...
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. More...
void	requestLabelBeforeInsn (const MachineInstr *MI)
	Ensure that a label will be emitted before MI. More...
void	requestLabelAfterInsn (const MachineInstr *MI)
	Ensure that a label will be emitted after MI. More...
virtual void	skippedNonDebugFunction ()

Additional Inherited Members
Static Public Member Functions inherited from llvm::DebugHandlerBase
static uint64_t	getBaseTypeSize (const DITypeRef TyRef)
	If this type is derived from a base type then return base type size. More...
Protected Attributes inherited from llvm::DebugHandlerBase
AsmPrinter *	Asm
	Target of debug info emission. More...
MachineModuleInfo *	MMI
	Collected machine module information. More...
DebugLoc	PrevInstLoc
	Previous instruction's location information. More...
MCSymbol *	PrevLabel = nullptr
const MachineBasicBlock *	PrevInstBB = nullptr
DebugLoc	PrologEndLoc
	This location indicates end of function prologue and beginning of function body. More...
const MachineInstr *	CurMI = nullptr
	If nonnull, stores the current machine instruction we're processing. More...
LexicalScopes	LScopes
DbgValueHistoryMap	DbgValues
	History of DBG_VALUE and clobber instructions for each user variable. More...
DbgLabelInstrMap	DbgLabels
	Mapping of inlined labels and DBG_LABEL machine instruction. More...
DenseMap< const MachineInstr *, MCSymbol * >	LabelsBeforeInsn
	Maps instruction with label emitted before instruction. More...
DenseMap< const MachineInstr *, MCSymbol * >	LabelsAfterInsn
	Maps instruction with label emitted after instruction. More...

Detailed Description

Collect and emit BTF information.

Definition at line 193 of file BTFDebug.h.

Constructor & Destructor Documentation

BTFDebug()

BTFDebug::BTFDebug

(

AsmPrinter *

AP

)

Definition at line 320 of file BTFDebug.cpp.

References llvm::MCStreamer::AddComment(), addString(), llvm::DebugHandlerBase::Asm, llvm::BTF::BPFFuncInfoSize, llvm::BTF::BPFLineInfoSize, llvm::BTFLineInfo::ColumnNum, E, llvm::MCStreamer::EmitBytes(), llvm::MCStreamer::EmitIntValue(), llvm::AsmPrinter::EmitLabelReference(), llvm::StringMap< ValueTy, AllocatorTy >::end(), llvm::BTF::ExtHeaderSize, llvm::ARMBuildAttrs::File, llvm::BTFLineInfo::FileNameOff, llvm::StringMap< ValueTy, AllocatorTy >::find(), llvm::DICompositeType::getBaseType(), llvm::MCStreamer::getContext(), llvm::DICompositeType::getElements(), llvm::MCContext::getELFSection(), llvm::DIBasicType::getEncoding(), llvm::DIScope::getFile(), llvm::DIType::getName(), llvm::DIType::getOffsetInBits(), llvm::BTFStringTable::getSize(), llvm::DIType::getSizeInBits(), llvm::BTFStringTable::getTable(), llvm::DINode::getTag(), llvm::DISubroutineType::getTypeArray(), llvm::BTF::HeaderSize, llvm::DIType::isForwardDecl(), llvm::BTFLineInfo::Label, llvm::BTFLineInfo::LineNum, llvm::BTFLineInfo::LineOff, llvm_unreachable, llvm::BTF::MAGIC, llvm::BTF::MAX_VLEN, llvm::TypedDINodeRef< T >::resolve(), llvm::MDNode::resolve(), llvm::BTF::SecFuncInfoSize, llvm::BTF::SecLineInfoSize, llvm::ELF::SHT_PROGBITS, llvm::DITypeRefArray::size(), llvm::size(), llvm::Sched::Source, llvm::MCStreamer::SwitchSection(), llvm::Tag, llvm::to_string(), llvm::Twine::utohexstr(), and llvm::BTF::VERSION.

Member Function Documentation

addString()

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

inline

Add string to the string table.

Definition at line 264 of file BTFDebug.h.

References llvm::BTFStringTable::addString().

Referenced by beginFunctionImpl(), BTFDebug(), llvm::BTFTypeDerived::completeType(), llvm::BTFTypeFwd::completeType(), llvm::BTFTypeInt::completeType(), llvm::BTFTypeEnum::completeType(), llvm::BTFTypeArray::completeType(), llvm::BTFTypeStruct::completeType(), llvm::BTFTypeFuncProto::completeType(), and llvm::BTFTypeFunc::completeType().

beginFunctionImpl()

void BTFDebug::beginFunctionImpl ( const MachineFunction *  MF )

overrideprotectedvirtual

Gather pre-function debug information.

Implements llvm::DebugHandlerBase.

Definition at line 638 of file BTFDebug.cpp.

References addString(), Arg, llvm::DebugHandlerBase::Asm, assert(), llvm::dyn_cast(), llvm::MachineFunction::getFunction(), llvm::AsmPrinter::getFunctionBegin(), llvm::Value::getName(), llvm::DIScope::getName(), llvm::MCSymbol::getSection(), llvm::MCSectionELF::getSectionName(), llvm::Function::getSubprogram(), llvm::MCSymbol::isInSection(), llvm::BTFFuncInfo::Label, llvm::DICompileUnit::NoDebug, llvm::ARMBuildAttrs::Section, llvm::BTFFuncInfo::TypeId, and Unit.

beginInstruction()

void BTFDebug::beginInstruction ( const MachineInstr *  MI )

overridevirtual

Process beginning of an instruction.

Reimplemented from llvm::DebugHandlerBase.

Definition at line 694 of file BTFDebug.cpp.

References llvm::DebugHandlerBase::Asm, llvm::DebugHandlerBase::beginInstruction(), llvm::MCContext::createTempSymbol(), llvm::MCStreamer::EmitLabel(), llvm::MachineInstr::FrameSetup, llvm::DebugLoc::get(), llvm::DebugLoc::getCol(), llvm::MCStreamer::getContext(), llvm::MachineInstr::getDebugLoc(), llvm::MachineInstr::getFlag(), llvm::MachineFunction::getFunction(), llvm::AsmPrinter::getFunctionBegin(), llvm::DebugLoc::getLine(), llvm::MachineInstr::getMF(), llvm::MachineInstr::getOperand(), llvm::Function::getSubprogram(), llvm::MachineOperand::getSymbolName(), llvm::MachineOperand::isDef(), llvm::MachineInstr::isInlineAsm(), llvm::MachineInstr::isMetaInstruction(), llvm::MachineOperand::isReg(), 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 688 of file BTFDebug.cpp.

endModule()

void BTFDebug::endModule ( )

overridevirtual

Complete all the types and emit the BTF sections.

Implements llvm::AsmPrinterHandler.

Definition at line 742 of file BTFDebug.cpp.

References llvm::Module::debug_compile_units(), llvm::MachineModuleInfo::getModule(), llvm::DIVariable::getType(), llvm::DebugHandlerBase::MMI, and llvm::TypedDINodeRef< T >::resolve().

getArrayIndexTypeId()

uint32_t llvm::BTFDebug::getArrayIndexTypeId ( )

inline

Get the special array index type id.

Definition at line 258 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 267 of file BTFDebug.h.

References assert().

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

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 274 of file BTFDebug.h.

References MI.

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

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