clang::interp::DynamicAllocator Class Reference

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 = llvm::DenseMap< const Expr *, AllocationSite >::const_iterator
	Allocation site iterator.

Public Member Functions
	DynamicAllocator ()=default
	~DynamicAllocator ()
void	cleanup ()
unsigned	getNumAllocations () const
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

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

Allocation site iterator.

Definition at line 91 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()

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

default

~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 54 of file DynamicAllocator.cpp.

References allocate(), clang::interp::Descriptor::asExpr(), D, 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 65 of file DynamicAllocator.cpp.

References D, and clang::interp::Block::invokeCtor().

Referenced by allocate().

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 42 of file DynamicAllocator.cpp.

References allocate(), D, 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 93 of file DynamicAllocator.h.

Referenced by clang::interp::InterpState::maybeDiagnoseDanglingAllocations().

cleanup()

void DynamicAllocator::cleanup

(

)

Definition at line 18 of file DynamicAllocator.cpp.

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

Referenced by clang::interp::InterpState::cleanup(), and ~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 94 of file DynamicAllocator.cpp.

References clang::interp::Block::invokeDtor().

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 84 of file DynamicAllocator.h.

getNumAllocations()

unsigned clang::interp::DynamicAllocator::getNumAllocations ( ) const

inline

Definition at line 66 of file DynamicAllocator.h.

Referenced by clang::interp::InterpState::maybeDiagnoseDanglingAllocations().

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

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