clang::interp::DynamicAllocator Class Reference

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

#include "/home/runner/work/llvm/llvm/repo/clang/lib/AST/ByteCode/DynamicAllocator.h"

Public Types
using	const_virtual_iter = llvm::DenseMap< const Expr *, AllocationSite >::const_iterator
	Allocation site iterator. More...

Public Member Functions
	DynamicAllocator ()=default
	~DynamicAllocator ()
void	cleanup ()
unsigned	getNumAllocations () const
Block *	allocate (const Descriptor *D, unsigned EvalID)
	Allocate ONE element of the given descriptor. More...
Block *	allocate (const Expr *Source, PrimType T, size_t NumElements, unsigned EvalID)
	Allocate NumElements primitive elements of the given type. More...
Block *	allocate (const Descriptor *D, size_t NumElements, unsigned EvalID)
	Allocate NumElements elements of the given descriptor. More...
bool	deallocate (const Expr *Source, const Block *BlockToDelete, InterpState &S)
	Deallocate the given source+block combination. More...
bool	isArrayAllocation (const Expr *Source) const
	Checks whether the allocation done at the given source is an array allocation. More...
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 82 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
	)

Allocate NumElements elements of the given descriptor.

Definition at line 53 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
	)

Allocate ONE element of the given descriptor.

Definition at line 63 of file DynamicAllocator.cpp.

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

Referenced by allocate().

allocate() [3/3]

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

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 84 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::Block::hasPointers(), clang::interp::Block::invokeDtor(), and Iter.

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 91 of file DynamicAllocator.cpp.

getNumAllocations()

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

inline

Definition at line 58 of file DynamicAllocator.h.

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

isArrayAllocation()

bool clang::interp::DynamicAllocator::isArrayAllocation ( const Expr *  Source ) const

inline

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

Definition at line 75 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