llvm::DWARFExpression::Operation Class Reference

This class represents an Operation in the Expression. More...

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

Classes
struct	Description
	Description of the encoding of one expression Op. More...

Public Types
enum	Encoding : uint8_t {   Size1 = 0, Size2 = 1, Size4 = 2, Size8 = 3,   SizeLEB = 4, SizeAddr = 5, SizeRefAddr = 6, SizeBlock = 7,   BaseTypeRef = 8, WasmLocationArg = 30, SignBit = 0x80, SignedSize1 = SignBit | Size1,   SignedSize2 = SignBit | Size2, SignedSize4 = SignBit | Size4, SignedSize8 = SignBit | Size8, SignedSizeLEB = SignBit | SizeLEB,   SizeNA = 0xFF }
	Size and signedness of expression operations' operands. More...
enum	DwarfVersion : uint8_t {   DwarfNA, Dwarf2 = 2, Dwarf3, Dwarf4,   Dwarf5 }

Public Member Functions
Description &	getDescription ()
uint8_t	getCode ()
uint64_t	getRawOperand (unsigned Idx)
uint64_t	getOperandEndOffset (unsigned Idx)
uint64_t	getEndOffset ()
bool	extract (DataExtractor Data, uint8_t AddressSize, uint64_t Offset, Optional< dwarf::DwarfFormat > Format)
bool	isError ()
bool	print (raw_ostream &OS, const DWARFExpression *Expr, const MCRegisterInfo *RegInfo, DWARFUnit *U, bool isEH)
bool	verify (DWARFUnit *U)

Friends
class	DWARFExpression::iterator

Detailed Description

This class represents an Operation in the Expression.

Each operation can have up to 2 oprerands.

An Operation can be in Error state (check with isError()). This means that it couldn't be decoded successfully and if it is the case, all others fields contain undefined values.

Definition at line 34 of file DWARFExpression.h.

Member Enumeration Documentation

DwarfVersion

enum llvm::DWARFExpression::Operation::DwarfVersion : uint8_t

Enumerator
DwarfNA	Serves as a marker for unused entries.
Dwarf2
Dwarf3
Dwarf4
Dwarf5

Definition at line 57 of file DWARFExpression.h.

Encoding

enum llvm::DWARFExpression::Operation::Encoding : uint8_t

Size and signedness of expression operations' operands.

Enumerator
Size1
Size2
Size4
Size8
SizeLEB
SizeAddr
SizeRefAddr
SizeBlock	Preceding operand contains block size.
BaseTypeRef
WasmLocationArg
SignBit
SignedSize1
SignedSize2
SignedSize4
SignedSize8
SignedSizeLEB
SizeNA	Unused operands get this encoding.

Definition at line 37 of file DWARFExpression.h.

Member Function Documentation

extract()

bool llvm::DWARFExpression::Operation::extract	(	DataExtractor	Data,
		uint8_t	AddressSize,
		uint64_t	Offset,
		Optional< dwarf::DwarfFormat >	Format
	)

Definition at line 120 of file DWARFExpression.cpp.

References assert(), llvm::dwarf::getDwarfOffsetByteSize(), llvm::getOpDesc(), llvm::DataExtractor::getSLEB128(), llvm::DataExtractor::getU16(), llvm::DataExtractor::getU32(), llvm::DataExtractor::getU64(), llvm::DataExtractor::getU8(), llvm::DataExtractor::getULEB128(), llvm::DataExtractor::getUnsigned(), llvm_unreachable, Operands, Signed, and Size.

Referenced by getEndOffset(), and llvm::DWARFExpression::iterator::operator++().

getCode()

uint8_t llvm::DWARFExpression::Operation::getCode ( )

inline

Definition at line 89 of file DWARFExpression.h.

Referenced by llvm::printCompactDWARFExpr().

getDescription()

Description& llvm::DWARFExpression::Operation::getDescription ( )

inline

Definition at line 88 of file DWARFExpression.h.

getEndOffset()

uint64_t llvm::DWARFExpression::Operation::getEndOffset ( )

inline

Definition at line 92 of file DWARFExpression.h.

References llvm::Data, and extract().

getOperandEndOffset()

uint64_t llvm::DWARFExpression::Operation::getOperandEndOffset ( unsigned  Idx )

inline

Definition at line 91 of file DWARFExpression.h.

getRawOperand()

uint64_t llvm::DWARFExpression::Operation::getRawOperand ( unsigned  Idx )

inline

Definition at line 90 of file DWARFExpression.h.

Referenced by llvm::printCompactDWARFExpr().

isError()

bool llvm::DWARFExpression::Operation::isError ( )

inline

Definition at line 95 of file DWARFExpression.h.

References llvm::lltok::Error, print(), and verify().

Referenced by llvm::DWARFExpression::iterator::operator++().

print()

bool llvm::DWARFExpression::Operation::print	(	raw_ostream &	OS,
		const DWARFExpression *	Expr,
		const MCRegisterInfo *	RegInfo,
		DWARFUnit *	U,
		bool	isEH
	)

Definition at line 254 of file DWARFExpression.cpp.

References assert(), llvm::StringRef::empty(), llvm::format(), llvm::DataExtractor::getU8(), Name, Operands, llvm::dwarf::OperationEncodingString(), llvm::prettyPrintBaseTypeRef(), llvm::prettyPrintRegisterOp(), Signed, and Size.

Referenced by llvm::DWARFExpression::end(), and isError().

verify()

bool llvm::DWARFExpression::Operation::verify

(

DWARFUnit *

U

)

Definition at line 343 of file DWARFExpression.cpp.

References llvm::DWARFUnit::getDIEForOffset(), llvm::DWARFUnit::getOffset(), Operands, and Size.

Referenced by llvm::DWARFExpression::end(), and isError().

Friends And Related Function Documentation

DWARFExpression::iterator

friend class DWARFExpression::iterator

friend

Definition at line 79 of file DWARFExpression.h.

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

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