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
const Description &	getDescription () const
uint8_t	getCode () const
uint64_t	getRawOperand (unsigned Idx) const
uint64_t	getOperandEndOffset (unsigned Idx) const
uint64_t	getEndOffset () const
bool	isError () const
bool	print (raw_ostream &OS, DIDumpOptions DumpOpts, const DWARFExpression *Expr, DWARFUnit *U) const

Static Public Member Functions
static bool	verify (const Operation &Op, DWARFUnit *U)
	Verify Op. Does not affect the return of isError().

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 33 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 56 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 36 of file DWARFExpression.h.

Member Function Documentation

getCode()

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

inline

Definition at line 88 of file DWARFExpression.h.

getDescription()

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

inline

Definition at line 87 of file DWARFExpression.h.

getEndOffset()

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

inline

Definition at line 93 of file DWARFExpression.h.

getOperandEndOffset()

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

inline

Definition at line 90 of file DWARFExpression.h.

References Idx.

getRawOperand()

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

inline

Definition at line 89 of file DWARFExpression.h.

References Idx, and Operands.

isError()

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

inline

Definition at line 94 of file DWARFExpression.h.

print()

bool llvm::DWARFExpression::Operation::print	(	raw_ostream &	OS,
		DIDumpOptions	DumpOpts,
		const DWARFExpression *	Expr,
		DWARFUnit *	U
	)		const

Definition at line 261 of file DWARFExpression.cpp.

References assert(), BaseTypeRef, llvm::format(), llvm::DataExtractor::getU8(), Name, llvm::Offset, Operands, llvm::dwarf::OperationEncodingString(), OS, llvm::prettyPrintBaseTypeRef(), llvm::DWARFExpression::prettyPrintRegisterOp(), SignBit, Signed, Size, SizeBlock, SizeNA, and WasmLocationArg.

verify()

bool llvm::DWARFExpression::Operation::verify ( const Operation &  Op, DWARFUnit *  U  )

static

Verify Op. Does not affect the return of isError().

Definition at line 357 of file DWARFExpression.cpp.

References BaseTypeRef, Size, and SizeNA.

Referenced by llvm::DWARFExpression::verify().

Friends And Related Function Documentation

DWARFExpression::iterator

friend class DWARFExpression::iterator

friend

Definition at line 78 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