llvm::DWARFUnitHeader Class Reference

Base class describing the header of any kind of "unit." Some information is specific to certain unit types. More...

#include "llvm/DebugInfo/DWARF/DWARFUnit.h"

Public Member Functions
bool	extract (DWARFContext &Context, const DWARFDataExtractor &debug_info, uint64_t *offset_ptr, DWARFSectionKind SectionKind)
	Parse a unit header from debug_info starting at offset_ptr.
bool	applyIndexEntry (const DWARFUnitIndex::Entry *Entry)
uint64_t	getOffset () const
const dwarf::FormParams &	getFormParams () const
uint16_t	getVersion () const
dwarf::DwarfFormat	getFormat () const
uint8_t	getAddressByteSize () const
uint8_t	getRefAddrByteSize () const
uint8_t	getDwarfOffsetByteSize () const
uint64_t	getLength () const
uint64_t	getAbbrOffset () const
std::optional< uint64_t >	getDWOId () const
void	setDWOId (uint64_t Id)
const DWARFUnitIndex::Entry *	getIndexEntry () const
uint64_t	getTypeHash () const
uint64_t	getTypeOffset () const
uint8_t	getUnitType () const
bool	isTypeUnit () const
uint8_t	getSize () const
uint8_t	getUnitLengthFieldByteSize () const
uint64_t	getNextUnitOffset () const

Detailed Description

Base class describing the header of any kind of "unit." Some information is specific to certain unit types.

We separate this class out so we can parse the header before deciding what specific kind of unit to construct.

Definition at line 50 of file DWARFUnit.h.

Member Function Documentation

applyIndexEntry()

bool DWARFUnitHeader::applyIndexEntry

(

const DWARFUnitIndex::Entry *

Entry

)

Definition at line 348 of file DWARFUnit.cpp.

References assert(), llvm::DWARFUnitIndex::Entry::getContribution(), getLength(), and getUnitLengthFieldByteSize().

extract()

bool DWARFUnitHeader::extract	(	DWARFContext &	Context,
		const DWARFDataExtractor &	debug_info,
		uint64_t *	offset_ptr,
		DWARFSectionKind	SectionKind
	)

Parse a unit header from debug_info starting at offset_ptr.

Note that SectionKind is used as a hint to guess the unit type for DWARF formats prior to DWARFv5. In DWARFv5 the unit type is explicitly defined in the header and the hint is ignored.

Definition at line 247 of file DWARFUnit.cpp.

References llvm::dwarf::FormParams::AddrSize, assert(), llvm::DWARFContext::checkAddressSizeSupported(), Context, llvm::createStringError(), llvm::DW_SECT_EXT_TYPES, llvm::dwarf::FormParams::Format, getAddressByteSize(), llvm::dwarf::FormParams::getDwarfOffsetByteSize(), llvm::DWARFDataExtractor::getInitialLength(), getLength(), llvm::DWARFContext::getMaxSupportedVersion(), getNextUnitOffset(), llvm::DWARFDataExtractor::getRelocatedValue(), llvm::DataExtractor::getU16(), llvm::DataExtractor::getU64(), llvm::DataExtractor::getU8(), getUnitLengthFieldByteSize(), llvm::DataExtractor::getUnsigned(), getVersion(), llvm::invalid_argument, llvm::DWARFContext::isSupportedVersion(), isTypeUnit(), llvm::DataExtractor::isValidOffset(), llvm::joinErrors(), llvm::DataExtractor::size(), llvm::Error::success(), and llvm::dwarf::FormParams::Version.

getAbbrOffset()

uint64_t llvm::DWARFUnitHeader::getAbbrOffset ( ) const

inline

Definition at line 94 of file DWARFUnit.h.

getAddressByteSize()

uint8_t llvm::DWARFUnitHeader::getAddressByteSize ( ) const

inline

Definition at line 88 of file DWARFUnit.h.

References llvm::dwarf::FormParams::AddrSize.

Referenced by extract().

getDwarfOffsetByteSize()

uint8_t llvm::DWARFUnitHeader::getDwarfOffsetByteSize ( ) const

inline

Definition at line 90 of file DWARFUnit.h.

References llvm::dwarf::FormParams::getDwarfOffsetByteSize().

getDWOId()

std::optional< uint64_t > llvm::DWARFUnitHeader::getDWOId ( ) const

inline

Definition at line 95 of file DWARFUnit.h.

Referenced by llvm::DWARFUnit::getDWOId().

getFormat()

dwarf::DwarfFormat llvm::DWARFUnitHeader::getFormat ( ) const

inline

Definition at line 87 of file DWARFUnit.h.

References llvm::dwarf::FormParams::Format.

getFormParams()

const dwarf::FormParams & llvm::DWARFUnitHeader::getFormParams ( ) const

inline

Definition at line 85 of file DWARFUnit.h.

getIndexEntry()

const DWARFUnitIndex::Entry * llvm::DWARFUnitHeader::getIndexEntry ( ) const

inline

Definition at line 100 of file DWARFUnit.h.

getLength()

uint64_t llvm::DWARFUnitHeader::getLength ( ) const

inline

Definition at line 93 of file DWARFUnit.h.

References llvm::Length.

Referenced by applyIndexEntry(), and extract().

getNextUnitOffset()

uint64_t llvm::DWARFUnitHeader::getNextUnitOffset ( ) const

inline

Definition at line 111 of file DWARFUnit.h.

References getUnitLengthFieldByteSize(), and llvm::Length.

Referenced by extract().

getOffset()

uint64_t llvm::DWARFUnitHeader::getOffset ( ) const

inline

Definition at line 84 of file DWARFUnit.h.

getRefAddrByteSize()

uint8_t llvm::DWARFUnitHeader::getRefAddrByteSize ( ) const

inline

Definition at line 89 of file DWARFUnit.h.

References llvm::dwarf::FormParams::getRefAddrByteSize().

getSize()

uint8_t llvm::DWARFUnitHeader::getSize ( ) const

inline

Definition at line 107 of file DWARFUnit.h.

getTypeHash()

uint64_t llvm::DWARFUnitHeader::getTypeHash ( ) const

inline

Definition at line 101 of file DWARFUnit.h.

Referenced by llvm::DWARFTypeUnit::getTypeHash().

getTypeOffset()

uint64_t llvm::DWARFUnitHeader::getTypeOffset ( ) const

inline

Definition at line 102 of file DWARFUnit.h.

Referenced by llvm::DWARFTypeUnit::getTypeOffset().

getUnitLengthFieldByteSize()

uint8_t llvm::DWARFUnitHeader::getUnitLengthFieldByteSize ( ) const

inline

Definition at line 108 of file DWARFUnit.h.

References llvm::dwarf::FormParams::Format, and llvm::dwarf::getUnitLengthFieldByteSize().

Referenced by applyIndexEntry(), extract(), and getNextUnitOffset().

getUnitType()

uint8_t llvm::DWARFUnitHeader::getUnitType ( ) const

inline

Definition at line 103 of file DWARFUnit.h.

getVersion()

uint16_t llvm::DWARFUnitHeader::getVersion ( ) const

inline

Definition at line 86 of file DWARFUnit.h.

References llvm::dwarf::FormParams::Version.

Referenced by extract().

isTypeUnit()

bool llvm::DWARFUnitHeader::isTypeUnit ( ) const

inline

Definition at line 104 of file DWARFUnit.h.

Referenced by extract().

setDWOId()

void llvm::DWARFUnitHeader::setDWOId ( uint64_t  Id )

inline

Definition at line 96 of file DWARFUnit.h.

References assert().

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

• include/llvm/DebugInfo/DWARF/DWARFUnit.h
• lib/DebugInfo/DWARF/DWARFUnit.cpp