A memory block, either on the stack or in the heap. More...

#include "/work/as-worker-4/publish-doxygen-docs/llvm-project/clang/lib/AST/ByteCode/Block.h"

Public Member Functions
	Block (unsigned EvalID, UnsignedOrNone DeclID, const Descriptor *Desc, unsigned MDSize=0, bool IsStatic=false, bool IsExtern=false, bool IsWeak=false)
	Creates a new block.
	Block (unsigned EvalID, const Descriptor *Desc, unsigned MDSize=0, bool IsStatic=false, bool IsExtern=false, bool IsWeak=false)
const Descriptor *	getDescriptor () const
	Returns the block's descriptor.
bool	hasPointers () const
	Checks if the block has any live pointers.
bool	isExtern () const
	Checks if the block is extern.
bool	isStatic () const
	Checks if the block has static storage duration.
bool	isTemporary () const
	Checks if the block is temporary.
bool	isWeak () const
bool	isDynamic () const
bool	isDead () const
unsigned	getSize () const
	Returns the size of the block, including metadata.
unsigned	getMetadataSize () const
	Returns the size of the metadata.
UnsignedOrNone	getDeclID () const
	Returns the declaration ID.
bool	isInitialized () const
	Returns whether the data of this block has been initialized via invoking the Ctor func.
unsigned	getEvalID () const
	The Evaluation ID this block was created in.
void	movePointersTo (Block *B)
	Move all pointers from this block to.
void	removePointers ()
	Make all pointers that currently point to this block point to nullptr.
std::byte *	data ()
	Returns a pointer to the stored data.
const std::byte *	data () const
std::byte *	rawData ()
	Returns a pointer to the raw data, including metadata.
const std::byte *	rawData () const
template<typename T>
const T &	deref () const
template<typename T>
T &	deref ()
template<typename T>
T &	getBlockDesc ()
template<typename T>
const T &	getBlockDesc () const
void	invokeCtor ()
	Invokes the constructor.
void	invokeCtorNoMemset ()
	The same, but won't memset() the memory first to zero.
void	invokeDtor ()
	Invokes the Destructor.
void	dump () const
void	dump (llvm::raw_ostream &OS) const
bool	isAccessible () const

Static Public Attributes
static constexpr uint8_t	InlineDescMD = sizeof(InlineDescriptor)
static constexpr uint8_t	GlobalMD = sizeof(GlobalInlineDescriptor)

Friends
class	Pointer
class	DeadBlock
class	InterpState
class	DynamicAllocator
class	Program

Detailed Description

A memory block, either on the stack or in the heap.

The storage described by the block is immediately followed by optional metadata, which is followed by the actual data.

Block* rawData() data() │ │ │ │ │ │ ▼ ▼ ▼ ┌───────────────┬──────────────────┬─────────────────┐ │ Block │ Metadata │ Data │ │ sizeof(Block) │ MDSize │ Desc->getSize() │ └───────────────┴──────────────────┴─────────────────┘

getSize() returns MDSize + Desc->getAllocSize().

Definition at line 43 of file Block.h.

Constructor & Destructor Documentation

◆ Block() [1/2]

clang::interp::Block::Block	(	unsigned	EvalID,
		UnsignedOrNone	DeclID,
		const Descriptor *	Desc,
		unsigned	MDSize = 0,
		bool	IsStatic = false,
		bool	IsExtern = false,
		bool	IsWeak = false )

inline

Creates a new block.

Definition at line 54 of file Block.h.

Referenced by getBlockDesc(), movePointersTo(), rawData(), and rawData().

◆ Block() [2/2]

clang::interp::Block::Block	(	unsigned	EvalID,
		const Descriptor *	Desc,
		unsigned	MDSize = 0,
		bool	IsStatic = false,
		bool	IsExtern = false,
		bool	IsWeak = false )

inline

Definition at line 64 of file Block.h.

Member Function Documentation

◆ data() [1/2]

std::byte * clang::interp::Block::data ( )

inline

Returns a pointer to the stored data.

You are allowed to read Desc->getSize() bytes from this address.

Definition at line 108 of file Block.h.

References rawData().

Referenced by deref(), deref(), clang::interp::InterpFrame::getParamPointer(), invokeCtorNoMemset(), and invokeDtor().

◆ data() [2/2]

const std::byte * clang::interp::Block::data ( ) const

inline

Definition at line 109 of file Block.h.

References rawData().

◆ deref() [1/2]

template<typename T>

T & clang::interp::Block::deref ( )

inline

Definition at line 123 of file Block.h.

References data(), and clang::T.

◆ deref() [2/2]

template<typename T>

const T & clang::interp::Block::deref ( ) const

inline

Definition at line 120 of file Block.h.

References data(), and clang::T.

Referenced by clang::interp::GetGlobal(), clang::interp::GetGlobalUnchecked(), clang::interp::GetLocal(), clang::interp::InterpFrame::getParam(), clang::interp::GetRefGlobal(), clang::interp::handleReference(), and clang::interp::InterpFrame::setLocal().

◆ dump() [1/2]

void clang::interp::Block::dump ( ) const

inline

Definition at line 158 of file Block.h.

References dump().

Referenced by dump().

◆ dump() [2/2]

LLVM_DUMP_METHOD void Block::dump ( llvm::raw_ostream & OS ) const

Definition at line 610 of file Disasm.cpp.

References isDead(), isDynamic(), isExtern(), isWeak(), Next, and Pointer.

◆ getBlockDesc() [1/2]

template<typename T>

T & clang::interp::Block::getBlockDesc ( )

inline

Definition at line 125 of file Block.h.

References rawData(), and clang::T.

Referenced by clang::interp::Pointer::allElementsAlive(), clang::interp::CheckGlobalLoad(), clang::interp::Destroy(), clang::interp::InterpFrame::enableLocal(), getBlockDesc(), clang::interp::GetGlobalUnchecked(), clang::interp::Program::getPtrGlobal(), clang::interp::GetRefGlobal(), clang::interp::handleReference(), clang::interp::InterpFrame::isLocalEnabled(), clang::interp::InterpFrame::setLocal(), clang::interp::Compiler< Emitter >::visitDecl(), and clang::interp::Compiler< Emitter >::visitDeclAndReturn().

◆ getBlockDesc() [2/2]

template<typename T>

const T & clang::interp::Block::getBlockDesc ( ) const

inline

Definition at line 129 of file Block.h.

References Block(), getBlockDesc(), and clang::T.

◆ getDeclID()

UnsignedOrNone clang::interp::Block::getDeclID ( ) const

inline

Returns the declaration ID.

Definition at line 95 of file Block.h.

Referenced by clang::interp::CheckTemporary().

◆ getDescriptor()

const Descriptor * clang::interp::Block::getDescriptor ( ) const

inline

◆ getEvalID()

unsigned clang::interp::Block::getEvalID ( ) const

inline

The Evaluation ID this block was created in.

Definition at line 100 of file Block.h.

Referenced by clang::interp::CheckTemporary(), and clang::interp::InterpState::lifetimeStartedInEvaluation().

◆ getMetadataSize()

unsigned clang::interp::Block::getMetadataSize ( ) const

inline

Returns the size of the metadata.

Definition at line 93 of file Block.h.

Referenced by clang::interp::Program::getPtrGlobal(), and clang::interp::Pointer::Pointer().

◆ getSize()

unsigned clang::interp::Block::getSize ( ) const

inline

Returns the size of the block, including metadata.

Definition at line 91 of file Block.h.

Referenced by clang::interp::InterpState::deallocate(), invokeCtor(), clang::interp::Pointer::print(), and clang::interp::MemberPointer::toPointer().

◆ hasPointers()

bool clang::interp::Block::hasPointers ( ) const

inline

Checks if the block has any live pointers.

Definition at line 75 of file Block.h.

Referenced by clang::interp::DynamicAllocator::deallocate(), clang::interp::InterpState::deallocate(), and movePointersTo().

◆ invokeCtor()

void clang::interp::Block::invokeCtor ( )

inline

Invokes the constructor.

Definition at line 134 of file Block.h.

References getSize(), invokeCtorNoMemset(), and rawData().

Referenced by clang::interp::InterpFrame::getLocalBlock(), and clang::interp::InterpFrame::getParamPointer().

◆ invokeCtorNoMemset()

void clang::interp::Block::invokeCtorNoMemset ( )

inline

The same, but won't memset() the memory first to zero.

Definition at line 140 of file Block.h.

References data().

Referenced by invokeCtor().

◆ invokeDtor()

void clang::interp::Block::invokeDtor ( )

inline

Invokes the Destructor.

Definition at line 151 of file Block.h.

References data().

Referenced by clang::interp::DynamicAllocator::cleanup(), clang::interp::DynamicAllocator::deallocate(), clang::interp::InterpState::deallocate(), clang::interp::Compiler< Emitter >::visitDecl(), and clang::interp::Compiler< Emitter >::visitDeclAndReturn().

◆ isAccessible()

bool clang::interp::Block::isAccessible ( ) const

inline

Definition at line 161 of file Block.h.

Referenced by clang::interp::CheckGlobalLoad().

◆ isDead()

bool clang::interp::Block::isDead ( ) const

inline

Definition at line 89 of file Block.h.

Referenced by clang::interp::DynamicAllocator::cleanup(), clang::interp::DynamicAllocator::deallocate(), clang::interp::InterpState::deallocate(), and dump().

◆ isDynamic()

bool clang::interp::Block::isDynamic ( ) const

inline

Definition at line 83 of file Block.h.

References clang::Result.

Referenced by clang::interp::InterpState::deallocate(), dump(), clang::interp::interp__builtin_operator_delete(), and clang::interp::noteValueLocation().

◆ isExtern()

bool clang::interp::Block::isExtern ( ) const

inline

Checks if the block is extern.

Definition at line 77 of file Block.h.

Referenced by clang::interp::CheckExtern(), clang::interp::CheckGlobalLoad(), clang::interp::CheckLocalLoad(), dump(), clang::interp::GetGlobalUnchecked(), and clang::interp::GetRefGlobal().

◆ isInitialized()

bool clang::interp::Block::isInitialized ( ) const

inline

Returns whether the data of this block has been initialized via invoking the Ctor func.

Definition at line 98 of file Block.h.

Referenced by clang::interp::DynamicAllocator::cleanup(), clang::interp::DynamicAllocator::deallocate(), clang::interp::InterpState::deallocate(), clang::interp::Destroy(), clang::interp::InterpFrame::destroy(), clang::interp::InterpFrame::getLocalBlock(), clang::interp::InterpFrame::getParam(), clang::interp::InterpFrame::getParamPointer(), clang::interp::InterpFrame::~InterpFrame(), and clang::interp::Program::~Program().

◆ isStatic()

bool clang::interp::Block::isStatic ( ) const

inline

Checks if the block has static storage duration.

Definition at line 79 of file Block.h.

Referenced by clang::interp::CheckTemporary(), clang::interp::InterpState::deallocate(), and clang::interp::getDynamicDecl().

◆ isTemporary()

bool clang::interp::Block::isTemporary ( ) const

inline

Checks if the block is temporary.

Definition at line 81 of file Block.h.

Referenced by clang::interp::CheckTemporary(), and clang::interp::noteValueLocation().

◆ isWeak()

bool clang::interp::Block::isWeak ( ) const

inline

Definition at line 82 of file Block.h.

Referenced by clang::interp::CheckWeak(), and dump().

◆ movePointersTo()

void Block::movePointersTo ( Block * B )

Move all pointers from this block to.

Parameters

B.

Definition at line 103 of file Block.cpp.

References Block(), clang::interp::Pointer::BS, hasPointers(), clang::interp::BlockPointer::Pointee, and Pointer.

Referenced by clang::interp::Program::createGlobal().

◆ rawData() [1/2]

std::byte * clang::interp::Block::rawData ( )

inline

Returns a pointer to the raw data, including metadata.

You are allowed to read Desc->getAllocSize() bytes from this address.

Definition at line 113 of file Block.h.

References Block().

Referenced by clang::interp::CheckLocalLoad(), data(), data(), clang::interp::InterpState::deallocate(), getBlockDesc(), and invokeCtor().

◆ rawData() [2/2]

const std::byte * clang::interp::Block::rawData ( ) const

inline

Definition at line 116 of file Block.h.

References Block().

◆ removePointers()

void Block::removePointers ( )

Make all pointers that currently point to this block point to nullptr.

Definition at line 115 of file Block.cpp.

References clang::interp::Pointer::BS, clang::interp::BlockPointer::Next, Next, clang::interp::BlockPointer::Pointee, Pointer, and clang::interp::BlockPointer::Prev.

Referenced by clang::interp::DynamicAllocator::cleanup().

◆ DeadBlock

friend class DeadBlock

friend

Definition at line 165 of file Block.h.

References DeadBlock.

Referenced by DeadBlock.

◆ DynamicAllocator

friend class DynamicAllocator

friend

Definition at line 167 of file Block.h.

References DynamicAllocator.

Referenced by DynamicAllocator.

◆ InterpState

friend class InterpState

friend

Definition at line 166 of file Block.h.

References InterpState.

Referenced by InterpState.

◆ Pointer

friend class Pointer

friend

Definition at line 164 of file Block.h.

References Pointer.

Referenced by dump(), movePointersTo(), Pointer, and removePointers().

◆ Program

friend class Program

friend

Definition at line 168 of file Block.h.

References Program.

Referenced by Program.

Member Data Documentation

◆ GlobalMD

uint8_t clang::interp::Block::GlobalMD = sizeof(GlobalInlineDescriptor)

staticconstexpr

Definition at line 51 of file Block.h.

◆ InlineDescMD

uint8_t clang::interp::Block::InlineDescMD = sizeof(InlineDescriptor)

staticconstexpr

Definition at line 50 of file Block.h.

Referenced by clang::interp::DynamicAllocator::allocate(), clang::interp::ByteCodeEmitter::createLocal(), clang::interp::EvalEmitter::createLocal(), and clang::interp::InterpFrame::InterpFrame().

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

lib/AST/ByteCode/Block.h
lib/AST/ByteCode/Block.cpp
lib/AST/ByteCode/Disasm.cpp

Public Member Functions

Static Public Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

◆ Block() [1/2]

◆ Block() [2/2]

Member Function Documentation

◆ data() [1/2]

◆ data() [2/2]

◆ deref() [1/2]

◆ deref() [2/2]

◆ dump() [1/2]

◆ dump() [2/2]

◆ getBlockDesc() [1/2]

◆ getBlockDesc() [2/2]

◆ getDeclID()

◆ getDescriptor()

◆ getEvalID()

◆ getMetadataSize()

◆ getSize()

◆ hasPointers()

◆ invokeCtor()

◆ invokeCtorNoMemset()

◆ invokeDtor()

◆ isAccessible()

◆ isDead()

◆ isDynamic()

◆ isExtern()

◆ isInitialized()

◆ isStatic()

◆ isTemporary()

◆ isWeak()

◆ movePointersTo()

◆ rawData() [1/2]

◆ rawData() [2/2]

◆ removePointers()

Friends And Related Symbol Documentation

◆ DeadBlock

◆ DynamicAllocator

◆ InterpState

◆ Pointer

◆ Program

Member Data Documentation

◆ GlobalMD

◆ InlineDescMD