clang::dataflow::RecordStorageLocation Class Reference

A storage location for a record (struct, class, or union). More...

#include "clang/Analysis/FlowSensitive/StorageLocation.h"

Inheritance diagram for clang::dataflow::RecordStorageLocation:

Public Types
using	FieldToLoc = llvm::DenseMap< const ValueDecl *, StorageLocation * >
using	SyntheticFieldMap = llvm::StringMap< StorageLocation * >
Public Types inherited from clang::dataflow::StorageLocation
enum class	Kind { Scalar , Record }

Public Member Functions
	RecordStorageLocation (QualType Type, FieldToLoc TheChildren, SyntheticFieldMap TheSyntheticFields)
StorageLocation *	getChild (const ValueDecl &D) const
	Returns the child storage location for D.
StorageLocation &	getSyntheticField (llvm::StringRef Name) const
	Returns the storage location for the synthetic field Name.
llvm::iterator_range< SyntheticFieldMap::const_iterator >	synthetic_fields () const
void	setChild (const ValueDecl &D, StorageLocation *Loc)
	Changes the child storage location for a field D of reference type.
llvm::iterator_range< FieldToLoc::const_iterator >	children () const
Public Member Functions inherited from clang::dataflow::StorageLocation
	StorageLocation (Kind LocKind, QualType Type)
	StorageLocation (const StorageLocation &)=delete
StorageLocation &	operator= (const StorageLocation &)=delete
virtual	~StorageLocation ()=default
Kind	getKind () const
QualType	getType () const

Static Public Member Functions
static bool	classof (const StorageLocation *Loc)

Detailed Description

A storage location for a record (struct, class, or union).

Contains storage locations for all modeled fields of the record (also referred to as "children"). The child map is flat, so accessible members of the base class are directly accessible as children of this location.

Record storage locations may also contain so-called synthetic fields. These are typically used to model the internal state of a class (e.g. the value stored in a std::optional) without having to depend on that class's implementation details. All RecordStorageLocations of a given type should have the same synthetic fields.

The storage location for a field of reference type may be null. This typically occurs in one of two situations:

• The record has not been fully initialized.
• The maximum depth for modelling a self-referential data structure has been reached. Storage locations for fields of all other types must be non-null.

FIXME: Currently, the storage location of unions is modelled the same way as that of structs or classes. Eventually, we need to change this modelling so that all of the members of a given union have the same storage location.

Definition at line 94 of file StorageLocation.h.

Member Typedef Documentation

FieldToLoc

using clang::dataflow::RecordStorageLocation::FieldToLoc = llvm::DenseMap<const ValueDecl *, StorageLocation *>

Definition at line 96 of file StorageLocation.h.

SyntheticFieldMap

using clang::dataflow::RecordStorageLocation::SyntheticFieldMap = llvm::StringMap<StorageLocation *>

Definition at line 97 of file StorageLocation.h.

Constructor & Destructor Documentation

RecordStorageLocation()

clang::dataflow::RecordStorageLocation::RecordStorageLocation ( QualType  Type, FieldToLoc  TheChildren, SyntheticFieldMap  TheSyntheticFields  )

inline

Definition at line 99 of file StorageLocation.h.

References clang::Type::isRecordType(), and Loc.

Member Function Documentation

children()

llvm::iterator_range< FieldToLoc::const_iterator > clang::dataflow::RecordStorageLocation::children ( ) const

inline

Definition at line 167 of file StorageLocation.h.

Referenced by clang::dataflow::copyRecord(), and clang::dataflow::recordsEqual().

classof()

static bool clang::dataflow::RecordStorageLocation::classof ( const StorageLocation *  Loc )

inlinestatic

Definition at line 114 of file StorageLocation.h.

References Loc, and clang::dataflow::StorageLocation::Record.

getChild()

StorageLocation * clang::dataflow::RecordStorageLocation::getChild ( const ValueDecl &  D ) const

inline

Returns the child storage location for D.

May return null if D has reference type; guaranteed to return non-null in all other cases.

Note that it is an error to call this with a field that does not exist. The function does not return null in this case.

Definition at line 125 of file StorageLocation.h.

References D.

Referenced by clang::dataflow::builtinTransferInitializer(), clang::dataflow::copyRecord(), and clang::dataflow::recordsEqual().

getSyntheticField()

StorageLocation & clang::dataflow::RecordStorageLocation::getSyntheticField ( llvm::StringRef  Name ) const

inline

Returns the storage location for the synthetic field Name.

The synthetic field must exist.

Definition at line 144 of file StorageLocation.h.

References Loc.

Referenced by clang::dataflow::copyRecord(), and clang::dataflow::recordsEqual().

setChild()

void clang::dataflow::RecordStorageLocation::setChild ( const ValueDecl &  D, StorageLocation *  Loc  )

inline

Changes the child storage location for a field D of reference type.

All other fields cannot change their storage location and always retain the storage location passed to the RecordStorageLocation constructor.

Requirements:

D must have reference type.

Definition at line 162 of file StorageLocation.h.

References D, and Loc.

Referenced by clang::dataflow::builtinTransferInitializer(), and clang::dataflow::copyField().

synthetic_fields()

llvm::iterator_range< SyntheticFieldMap::const_iterator > clang::dataflow::RecordStorageLocation::synthetic_fields ( ) const

inline

Definition at line 151 of file StorageLocation.h.

Referenced by clang::dataflow::copyRecord(), and clang::dataflow::recordsEqual().

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

• include/clang/Analysis/FlowSensitive/StorageLocation.h