clang: clang::interp::DynamicAllocator Class Reference

clang 22.0.0git

Manages dynamic memory allocations done during bytecode interpretation. More...

#include "/home/buildbot/as-worker-4/publish-doxygen-docs/llvm-project/clang/lib/AST/ByteCode/DynamicAllocator.h"

Public Types
enum class	Form : uint8_t { NonArray , Array , Operator }
using	const_virtual_iter
	Allocation site iterator.

Public Member Functions
	DynamicAllocator ()=default
	DynamicAllocator (DynamicAllocator &)=delete
	DynamicAllocator (DynamicAllocator &&)=delete
	~DynamicAllocator ()
void	cleanup ()
Block *	allocate (const Descriptor *D, unsigned EvalID, Form AllocForm)
	Allocate ONE element of the given descriptor.
Block *	allocate (const Expr *Source, PrimType T, size_t NumElements, unsigned EvalID, Form AllocForm)
	Allocate `NumElements` primitive elements of the given type.
Block *	allocate (const Descriptor *D, size_t NumElements, unsigned EvalID, Form AllocForm)
	Allocate `NumElements` elements of the given descriptor.
bool	deallocate (const Expr Source, const Block BlockToDelete, InterpState &S)
	Deallocate the given source+block combination.
std::optional< Form >	getAllocationForm (const Expr *Source) const
	Checks whether the allocation done at the given source is an array allocation.
llvm::iterator_range< const_virtual_iter >	allocation_sites () const
bool	hasAllocations () const

Detailed Description

Manages dynamic memory allocations done during bytecode interpretation.

We manage allocations as a map from their new-expression to a list of allocations. This is called an AllocationSite. For each site, we record whether it was allocated using new or new[], the IsArrayAllocation flag.

For all array allocations, we need to allocate new Descriptor instances, so the DynamicAllocator has a llvm::BumpPtrAllocator similar to Program.

Definition at line 33 of file DynamicAllocator.h.

Member Typedef Documentation

◆ const_virtual_iter

using clang::interp::DynamicAllocator::const_virtual_iter

Initial value:

llvm::DenseMap<const Expr *, AllocationSite>::const_iterator

Allocation site iterator.

Definition at line 95 of file DynamicAllocator.h.

Member Enumeration Documentation

◆ Form

enum class clang::interp::DynamicAllocator::Form : uint8_t

strong

Enumerator
NonArray
Array
Operator

Definition at line 35 of file DynamicAllocator.h.

Constructor & Destructor Documentation

◆ DynamicAllocator() [1/3]

clang::interp::DynamicAllocator::DynamicAllocator ( )

default

Referenced by DynamicAllocator(), and DynamicAllocator().

◆ DynamicAllocator() [2/3]

clang::interp::DynamicAllocator::DynamicAllocator ( DynamicAllocator & )

delete

References DynamicAllocator().

◆ DynamicAllocator() [3/3]

clang::interp::DynamicAllocator::DynamicAllocator ( DynamicAllocator && )

delete

References DynamicAllocator(), and clang::T.

◆ ~DynamicAllocator()

DynamicAllocator::~DynamicAllocator ( )

Definition at line 16 of file DynamicAllocator.cpp.

References cleanup().

Member Function Documentation

◆ allocate() [1/3]

Block * DynamicAllocator::allocate	(	const Descriptor *	D,
		size_t	NumElements,
		unsigned	EvalID,
		Form	AllocForm )

Allocate NumElements elements of the given descriptor.

Definition at line 57 of file DynamicAllocator.cpp.

References allocate(), clang::interp::Descriptor::asExpr(), clang::interp::Descriptor::getMetadataSize(), and clang::interp::Descriptor::InlineDescMD.

◆ allocate() [2/3]

Block * DynamicAllocator::allocate	(	const Descriptor *	D,
		unsigned	EvalID,
		Form	AllocForm )

Allocate ONE element of the given descriptor.

Definition at line 71 of file DynamicAllocator.cpp.

References clang::interp::Alloc(), clang::interp::Descriptor::asExpr(), clang::interp::Block, clang::interp::InlineDescriptor::Desc, clang::interp::Ended, clang::interp::Descriptor::getAllocSize(), clang::interp::Descriptor::getMetadataSize(), clang::interp::Descriptor::isCompositeArray(), clang::interp::Descriptor::IsConst, Operator, and clang::interp::Started.

Referenced by clang::interp::Alloc(), allocate(), allocate(), clang::interp::AllocCN(), clang::interp::AllocN(), and clang::interp::interp__builtin_operator_new().

◆ allocate() [3/3]

Block * DynamicAllocator::allocate	(	const Expr *	Source,
		PrimType	T,
		size_t	NumElements,
		unsigned	EvalID,
		Form	AllocForm )

Allocate NumElements primitive elements of the given type.

Definition at line 45 of file DynamicAllocator.cpp.

References allocate(), clang::interp::Descriptor::InlineDescMD, and clang::T.

◆ allocation_sites()

llvm::iterator_range< const_virtual_iter > clang::interp::DynamicAllocator::allocation_sites ( ) const

inline

Definition at line 97 of file DynamicAllocator.h.

◆ cleanup()

void DynamicAllocator::cleanup ( )

Definition at line 18 of file DynamicAllocator.cpp.

References clang::interp::Alloc(), clang::interp::Pointer::asBlockPointer(), clang::interp::Pointer::BS, clang::interp::Block::hasPointers(), clang::interp::Block::invokeDtor(), clang::interp::Block::isDead(), clang::interp::Block::isInitialized(), clang::interp::BlockPointer::Next, Next, and clang::interp::BlockPointer::Pointee.

Referenced by ~DynamicAllocator().

◆ deallocate()

bool DynamicAllocator::deallocate	(	const Expr *	Source,
		const Block *	BlockToDelete,
		InterpState &	S )

Deallocate the given source+block combination.

Returns true if anything has been deallocatd, false otherwise.

Definition at line 118 of file DynamicAllocator.cpp.

References clang::interp::Block::hasPointers(), clang::interp::Block::invokeDtor(), clang::interp::Block::isDead(), and clang::interp::Block::isInitialized().

Referenced by clang::interp::Free(), and clang::interp::interp__builtin_operator_delete().

◆ getAllocationForm()

std::optional< Form > clang::interp::DynamicAllocator::getAllocationForm ( const Expr * Source ) const

inline

Checks whether the allocation done at the given source is an array allocation.

Definition at line 88 of file DynamicAllocator.h.

Referenced by clang::interp::Free(), and clang::interp::interp__builtin_operator_delete().

◆ hasAllocations()

bool clang::interp::DynamicAllocator::hasAllocations ( ) const

inline

Definition at line 101 of file DynamicAllocator.h.

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

lib/AST/ByteCode/DynamicAllocator.h
lib/AST/ByteCode/DynamicAllocator.cpp