This structure is used to keep data of the concrete section. More...

#include "DWARFLinker/Parallel/OutputSections.h"

Inheritance diagram for llvm::dwarf_linker::parallel::SectionDescriptor:

Public Member Functions
	SectionDescriptor (DebugSectionKind SectionKind, LinkingGlobalData &GlobalData, dwarf::FormParams Format, llvm::endianness Endianess)
void	clearAllSectionData ()
	Erase whole section content(data bits, list of patches).
void	clearSectionContent ()
	Erase only section output data bits.
template<typename T>
void	notePatchWithOffsetUpdate (const T &Patch, OffsetsPtrVector &PatchesOffsetsList)
	While creating patches, offsets to attributes may be partially unknown(because size of abbreviation number is unknown).
void	setSizesForSectionCreatedByAsmPrinter ()
	Some sections are emitted using AsmPrinter.
StringRef	getContents () override
	Returns section content.
void	emitUnitLength (uint64_t Length)
	Emit unit length into the current section contents.
void	maybeEmitDwarf64Mark ()
	Emit DWARF64 mark into the current section contents.
void	emitOffset (uint64_t Val)
	Emit specified offset value into the current section contents.
void	emitIntVal (uint64_t Val, unsigned Size)
	Emit specified integer value into the current section contents.
void	emitString (dwarf::Form StringForm, const char *StringVal)
void	emitBinaryData (llvm::StringRef Data)
void	emitInplaceString (StringRef String)
	Emit specified inplace string value into the current section contents.
void	emitStringPlaceholder ()
	Emit string placeholder into the current section contents.
void	apply (uint64_t PatchOffset, dwarf::Form AttrForm, uint64_t Val)
	Write specified `Value` of `AttrForm` to the `PatchOffset`.
uint64_t	getIntVal (uint64_t PatchOffset, unsigned Size)
	Returns integer value of `Size` located by specified `PatchOffset`.
Public Member Functions inherited from llvm::dwarf_linker::parallel::SectionDescriptorBase
	SectionDescriptorBase (DebugSectionKind SectionKind, dwarf::FormParams Format, llvm::endianness Endianess)
virtual	~SectionDescriptorBase ()=default
DebugSectionKind	getKind ()
	Returns section kind.
const StringLiteral &	getName () const
	Returns section name.
llvm::endianness	getEndianess () const
	Returns endianess used by section.
dwarf::FormParams	getFormParams () const
	Returns FormParams used by section.

Public Attributes
friend	OutputSections
uint64_t	StartOffset = 0
	When objects(f.e.
raw_svector_ostream	OS
	Stream which stores data to the Contents.

Protected Member Functions
void	applyIntVal (uint64_t PatchOffset, uint64_t Val, unsigned Size)
	Writes integer value `Val` of `Size` by specified `PatchOffset`.
void	applyULEB128 (uint64_t PatchOffset, uint64_t Val)
	Writes integer value `Val` of ULEB128 format by specified `PatchOffset`.
void	applySLEB128 (uint64_t PatchOffset, uint64_t Val)
	Writes integer value `Val` of SLEB128 format by specified `PatchOffset`.
void	setOutputFormat (dwarf::FormParams Format, llvm::endianness Endianess)
	Sets output format.

Protected Attributes
OutSectionDataTy	Contents
	Section data bits.
LinkingGlobalData &	GlobalData
size_t	SectionOffsetInsideAsmPrinterOutputStart = 0
	Some sections are generated using AsmPrinter.
size_t	SectionOffsetInsideAsmPrinterOutputEnd = 0
Protected Attributes inherited from llvm::dwarf_linker::parallel::SectionDescriptorBase
DebugSectionKind	SectionKind = DebugSectionKind::NumberOfEnumEntries
	The section kind.
dwarf::FormParams	Format = {4, 4, dwarf::DWARF32}
	Output format.
llvm::endianness	Endianess = llvm::endianness::little

Detailed Description

This structure is used to keep data of the concrete section.

Like data bits, list of patches, format.

Definition at line 166 of file OutputSections.h.

Constructor & Destructor Documentation

◆ SectionDescriptor()

llvm::dwarf_linker::parallel::SectionDescriptor::SectionDescriptor	(	DebugSectionKind	SectionKind,
		LinkingGlobalData &	GlobalData,
		dwarf::FormParams	Format,
		llvm::endianness	Endianess )

inline

Definition at line 169 of file OutputSections.h.

References Contents, llvm::dwarf_linker::parallel::SectionDescriptorBase::Endianess, llvm::dwarf_linker::parallel::SectionDescriptorBase::Format, GlobalData, OS, llvm::dwarf_linker::parallel::SectionDescriptorBase::SectionDescriptorBase(), and llvm::dwarf_linker::parallel::SectionDescriptorBase::SectionKind.

Member Function Documentation

◆ apply()

void SectionDescriptor::apply	(	uint64_t	PatchOffset,
		dwarf::Form	AttrForm,
		uint64_t	Val )

Write specified Value of AttrForm to the PatchOffset.

Definition at line 172 of file OutputSections.cpp.

References applyIntVal(), applySLEB128(), applyULEB128(), llvm::dwarf_linker::parallel::SectionDescriptorBase::Format, and llvm_unreachable.

Referenced by llvm::dwarf_linker::parallel::DwarfUnit::emitDebugStringOffsetSection(), and llvm::dwarf_linker::parallel::DwarfUnit::emitPubAccelerators().

◆ applyIntVal()

void SectionDescriptor::applyIntVal	(	uint64_t	PatchOffset,
		uint64_t	Val,
		unsigned	Size )

protected

Writes integer value Val of Size by specified PatchOffset.

Definition at line 251 of file OutputSections.cpp.

References assert(), data, llvm::dwarf_linker::parallel::SectionDescriptorBase::Endianess, getContents(), llvm_unreachable, Size, llvm::size(), and llvm::support::endian::write().

Referenced by apply().

◆ applySLEB128()

void SectionDescriptor::applySLEB128	(	uint64_t	PatchOffset,
		uint64_t	Val )

protected

Writes integer value Val of SLEB128 format by specified PatchOffset.

Definition at line 293 of file OutputSections.cpp.

References assert(), data, llvm::encodeSLEB128(), llvm::dwarf_linker::parallel::SectionDescriptorBase::Format, getContents(), and llvm::size().

Referenced by apply().

◆ applyULEB128()

void SectionDescriptor::applyULEB128	(	uint64_t	PatchOffset,
		uint64_t	Val )

protected

Writes integer value Val of ULEB128 format by specified PatchOffset.

Definition at line 281 of file OutputSections.cpp.

References assert(), data, llvm::encodeULEB128(), llvm::dwarf_linker::parallel::SectionDescriptorBase::Format, getContents(), and llvm::size().

Referenced by apply().

◆ clearAllSectionData()

void SectionDescriptor::clearAllSectionData ( )

Erase whole section content(data bits, list of patches).

Definition at line 59 of file OutputSections.cpp.

References clearSectionContent(), and StartOffset.

◆ clearSectionContent()

void SectionDescriptor::clearSectionContent ( )

Erase only section output data bits.

Definition at line 77 of file OutputSections.cpp.

References Contents.

Referenced by clearAllSectionData().

◆ emitBinaryData()

void SectionDescriptor::emitBinaryData ( llvm::StringRef Data )

Definition at line 168 of file OutputSections.cpp.

References llvm::Data, and OS.

◆ emitInplaceString()

void llvm::dwarf_linker::parallel::SectionDescriptor::emitInplaceString ( StringRef String )

inline

Emit specified inplace string value into the current section contents.

Definition at line 276 of file OutputSections.h.

References emitIntVal(), OS, and llvm::String.

Referenced by llvm::dwarf_linker::parallel::DwarfUnit::emitPubAcceleratorEntry(), and emitString().

◆ emitIntVal()

void SectionDescriptor::emitIntVal	(	uint64_t	Val,
		unsigned	Size )

Emit specified integer value into the current section contents.

Definition at line 141 of file OutputSections.cpp.

References llvm::dwarf_linker::parallel::SectionDescriptorBase::Endianess, llvm_unreachable, llvm::native, OS, Size, and llvm::sys::swapByteOrder().

Referenced by llvm::dwarf_linker::parallel::DwarfUnit::emitDebugStringOffsetSection(), emitInplaceString(), emitOffset(), llvm::dwarf_linker::parallel::DwarfUnit::emitPubAcceleratorEntry(), llvm::dwarf_linker::parallel::DwarfUnit::emitPubAccelerators(), emitUnitLength(), and maybeEmitDwarf64Mark().

◆ emitOffset()

void llvm::dwarf_linker::parallel::SectionDescriptor::emitOffset ( uint64_t Val )

inline

Emit specified offset value into the current section contents.

Definition at line 264 of file OutputSections.h.

References emitIntVal(), llvm::dwarf_linker::parallel::SectionDescriptorBase::getFormParams(), and uint64_t.

Referenced by llvm::dwarf_linker::parallel::DwarfUnit::emitDebugStringOffsetSection(), llvm::dwarf_linker::parallel::DwarfUnit::emitPubAcceleratorEntry(), and emitStringPlaceholder().

◆ emitString()

void SectionDescriptor::emitString	(	dwarf::Form	StringForm,
		const char *	StringVal )

Definition at line 117 of file OutputSections.cpp.

References assert(), emitInplaceString(), emitStringPlaceholder(), GlobalData, llvm_unreachable, and OS.

◆ emitStringPlaceholder()

void llvm::dwarf_linker::parallel::SectionDescriptor::emitStringPlaceholder ( )

inline

Emit string placeholder into the current section contents.

Definition at line 282 of file OutputSections.h.

References emitOffset().

Referenced by emitString().

◆ emitUnitLength()

void llvm::dwarf_linker::parallel::SectionDescriptor::emitUnitLength ( uint64_t Length )

inline

Emit unit length into the current section contents.

Definition at line 251 of file OutputSections.h.

References emitIntVal(), llvm::dwarf_linker::parallel::SectionDescriptorBase::getFormParams(), llvm::Length, maybeEmitDwarf64Mark(), and uint64_t.

Referenced by llvm::dwarf_linker::parallel::DwarfUnit::emitDebugStringOffsetSection().

◆ getContents()

StringRef llvm::dwarf_linker::parallel::SectionDescriptor::getContents ( )

inlineoverridevirtual

Returns section content.

Implements llvm::dwarf_linker::parallel::SectionDescriptorBase.

Definition at line 242 of file OutputSections.h.

References Contents, SectionOffsetInsideAsmPrinterOutputEnd, and SectionOffsetInsideAsmPrinterOutputStart.

Referenced by applyIntVal(), applySLEB128(), applyULEB128(), and getIntVal().

◆ getIntVal()

uint64_t SectionDescriptor::getIntVal	(	uint64_t	PatchOffset,
		unsigned	Size )

Returns integer value of Size located by specified PatchOffset.

Definition at line 227 of file OutputSections.cpp.

References assert(), data, llvm::StringRef::data(), llvm::dwarf_linker::parallel::SectionDescriptorBase::Endianess, getContents(), llvm_unreachable, llvm::support::endian::read16(), llvm::support::endian::read32(), llvm::support::endian::read64(), Size, and llvm::size().

◆ maybeEmitDwarf64Mark()

void llvm::dwarf_linker::parallel::SectionDescriptor::maybeEmitDwarf64Mark ( )

inline

Emit DWARF64 mark into the current section contents.

Definition at line 257 of file OutputSections.h.

References llvm::dwarf::DW_LENGTH_DWARF64, llvm::dwarf::DWARF64, emitIntVal(), llvm::dwarf_linker::parallel::SectionDescriptorBase::Format, and llvm::dwarf_linker::parallel::SectionDescriptorBase::getFormParams().

Referenced by emitUnitLength().

◆ notePatchWithOffsetUpdate()

template<typename T>

void llvm::dwarf_linker::parallel::SectionDescriptor::notePatchWithOffsetUpdate	(	const T &	Patch,
		OffsetsPtrVector &	PatchesOffsetsList )

inline

While creating patches, offsets to attributes may be partially unknown(because size of abbreviation number is unknown).

In such case we remember patch itself and pointer to patch application offset to add size of abbreviation number later.

Definition at line 231 of file OutputSections.h.

References llvm::SmallVectorImpl< T >::emplace_back(), and T.

Referenced by llvm::dwarf_linker::parallel::TypeUnit::createDIETree().

◆ setOutputFormat()

void llvm::dwarf_linker::parallel::SectionDescriptor::setOutputFormat	(	dwarf::FormParams	Format,
		llvm::endianness	Endianess )

inlineprotected

Sets output format.

Definition at line 304 of file OutputSections.h.

References llvm::dwarf_linker::parallel::SectionDescriptorBase::Endianess, and llvm::dwarf_linker::parallel::SectionDescriptorBase::Format.

◆ setSizesForSectionCreatedByAsmPrinter()

void SectionDescriptor::setSizesForSectionCreatedByAsmPrinter ( )

Some sections are emitted using AsmPrinter.

In that case "Contents" member of SectionDescriptor contains elf file. This method searches for section data inside elf file and remember offset to it.

Definition at line 79 of file OutputSections.cpp.

References llvm::consumeError(), Contents, llvm::object::ObjectFile::createObjectFile(), llvm::Data, llvm::dwarf_linker::parseDebugTableName(), llvm::dwarf_linker::parallel::SectionDescriptorBase::SectionKind, SectionOffsetInsideAsmPrinterOutputEnd, SectionOffsetInsideAsmPrinterOutputStart, and llvm::Expected< T >::takeError().

Referenced by llvm::dwarf_linker::parallel::DWARFLinkerImpl::emitAppleAcceleratorSections(), llvm::dwarf_linker::parallel::DwarfUnit::emitDebugInfo(), and llvm::dwarf_linker::parallel::DWARFLinkerImpl::emitDWARFv5DebugNamesSection().

Member Data Documentation

◆ Contents

OutSectionDataTy llvm::dwarf_linker::parallel::SectionDescriptor::Contents

protected

Section data bits.

Definition at line 201 of file OutputSections.h.

Referenced by clearSectionContent(), getContents(), SectionDescriptor(), and setSizesForSectionCreatedByAsmPrinter().

◆ GlobalData

LinkingGlobalData& llvm::dwarf_linker::parallel::SectionDescriptor::GlobalData

protected

Definition at line 309 of file OutputSections.h.

Referenced by emitString(), and SectionDescriptor().

◆ OS

raw_svector_ostream llvm::dwarf_linker::parallel::SectionDescriptor::OS

Stream which stores data to the Contents.

Definition at line 205 of file OutputSections.h.

◆ OutputSections

friend llvm::dwarf_linker::parallel::SectionDescriptor::OutputSections

Definition at line 167 of file OutputSections.h.

◆ SectionOffsetInsideAsmPrinterOutputEnd

size_t llvm::dwarf_linker::parallel::SectionDescriptor::SectionOffsetInsideAsmPrinterOutputEnd = 0

protected

Definition at line 315 of file OutputSections.h.

Referenced by getContents(), and setSizesForSectionCreatedByAsmPrinter().

◆ SectionOffsetInsideAsmPrinterOutputStart

size_t llvm::dwarf_linker::parallel::SectionDescriptor::SectionOffsetInsideAsmPrinterOutputStart = 0

protected

Some sections are generated using AsmPrinter.

The real section data located inside elf file in that case. Following fields points to the real section content inside elf file.

Definition at line 314 of file OutputSections.h.

Referenced by getContents(), and setSizesForSectionCreatedByAsmPrinter().

◆ StartOffset

uint64_t llvm::dwarf_linker::parallel::SectionDescriptor::StartOffset = 0

When objects(f.e.

compile units) are glued into the single file, the debug sections corresponding to the concrete object are assigned with offsets inside the whole file. This field keeps offset to the debug section, corresponding to this object.

Definition at line 197 of file OutputSections.h.

Referenced by llvm::dwarf_linker::parallel::OutputSections::applyPatches(), and clearAllSectionData().

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

lib/DWARFLinker/Parallel/OutputSections.h
lib/DWARFLinker/Parallel/OutputSections.cpp

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SectionDescriptor()

Member Function Documentation

◆ apply()

◆ applyIntVal()

◆ applySLEB128()

◆ applyULEB128()

◆ clearAllSectionData()

◆ clearSectionContent()

◆ emitBinaryData()

◆ emitInplaceString()

◆ emitIntVal()

◆ emitOffset()

◆ emitString()

◆ emitStringPlaceholder()

◆ emitUnitLength()

◆ getContents()

◆ getIntVal()

◆ maybeEmitDwarf64Mark()

◆ notePatchWithOffsetUpdate()

◆ setOutputFormat()

◆ setSizesForSectionCreatedByAsmPrinter()

Member Data Documentation

◆ Contents

◆ GlobalData

◆ OS

◆ OutputSections

◆ SectionOffsetInsideAsmPrinterOutputEnd

◆ SectionOffsetInsideAsmPrinterOutputStart

◆ StartOffset