Package it.unive.lisa.analysis.numeric

Class Parity

java.lang.Object

it.unive.lisa.analysis.numeric.Parity

All Implemented Interfaces:

it.unive.lisa.analysis.BaseLattice<Parity>, it.unive.lisa.analysis.Lattice<Parity>, it.unive.lisa.analysis.nonrelational.NonRelationalDomain<Parity,it.unive.lisa.symbolic.value.ValueExpression,it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity>>, it.unive.lisa.analysis.nonrelational.NonRelationalElement<Parity,it.unive.lisa.symbolic.value.ValueExpression,it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity>>, it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>, it.unive.lisa.analysis.nonrelational.value.NonRelationalValueDomain<Parity>, it.unive.lisa.analysis.SemanticEvaluator

public class Parity
extends java.lang.Object
implements it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>

The overflow-insensitive Parity abstract domain, tracking if a numeric value is even or odd, implemented as a BaseNonRelationalValueDomain, handling top and bottom values for the expression evaluation and bottom values for the expression satisfiability. Top and bottom cases for least upper bound, widening and less or equals operations are handled by BaseLattice in BaseLattice.lub(L), BaseLattice.widening(L) and BaseLattice.lessOrEqual(L) methods, respectively.

Nested Class Summary

Nested classes/interfaces inherited from interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain

it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain.EvaluationVisitor<T extends it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<T>>

Field Summary

Fields

Modifier and Type	Field	Description
static Parity	BOTTOM	The abstract bottom element.
static Parity	EVEN	The abstract even element.
static Parity	ODD	The abstract odd element.
static Parity	TOP	The abstract top element.

Fields inherited from interface it.unive.lisa.analysis.Lattice

BOTTOM_STRING, TOP_STRING

Constructor Summary

Constructors

Constructor	Description
Parity()	Builds the parity abstract domain, representing the top of the parity abstract domain.
Parity(byte parity)	Builds the parity instance for the given parity value.

Method Summary

Modifier and Type	Method	Description
it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity>	assumeBinaryExpression(it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity> environment, it.unive.lisa.symbolic.value.operator.binary.BinaryOperator operator, it.unive.lisa.symbolic.value.ValueExpression left, it.unive.lisa.symbolic.value.ValueExpression right, it.unive.lisa.program.cfg.ProgramPoint src, it.unive.lisa.program.cfg.ProgramPoint dest)
Parity	bottom()
boolean	equals(java.lang.Object obj)
Parity	evalBinaryExpression(it.unive.lisa.symbolic.value.operator.binary.BinaryOperator operator, Parity left, Parity right, it.unive.lisa.program.cfg.ProgramPoint pp)
Parity	evalNonNullConstant(it.unive.lisa.symbolic.value.Constant constant, it.unive.lisa.program.cfg.ProgramPoint pp)
Parity	evalNullConstant(it.unive.lisa.program.cfg.ProgramPoint pp)
Parity	evalUnaryExpression(it.unive.lisa.symbolic.value.operator.unary.UnaryOperator operator, Parity arg, it.unive.lisa.program.cfg.ProgramPoint pp)
int	hashCode()
boolean	isEven()	Yields whether or not this is the even parity.
boolean	isOdd()	Yields whether or not this is the odd parity.
boolean	lessOrEqualAux(Parity other)
Parity	lubAux(Parity other)
it.unive.lisa.analysis.representation.DomainRepresentation	representation()
Parity	top()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface it.unive.lisa.analysis.BaseLattice

glb, glbAux, lessOrEqual, lub, narrowing, narrowingAux, toString, widening, wideningAux

Methods inherited from interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain

assume, assumeTernaryExpression, assumeUnaryExpression, canProcess, eval, evalIdentifier, evalPushAny, evalSkip, evalTernaryExpression, evalTypeCast, evalTypeConv, satisfies, satisfiesAbstractValue, satisfiesBinaryExpression, satisfiesNonNullConstant, satisfiesNullConstant, satisfiesTernaryExpression, satisfiesUnaryExpression, tracksIdentifiers

Methods inherited from interface it.unive.lisa.analysis.Lattice

isBottom, isTop

Methods inherited from interface it.unive.lisa.analysis.nonrelational.NonRelationalElement

variable

Field Detail

EVEN

public static final Parity EVEN

The abstract even element.

ODD

public static final Parity ODD

The abstract odd element.

TOP

public static final Parity TOP

The abstract top element.

BOTTOM

public static final Parity BOTTOM

The abstract bottom element.

Constructor Detail

Parity

public Parity()

Builds the parity abstract domain, representing the top of the parity abstract domain.

Parity

public Parity(byte parity)

Builds the parity instance for the given parity value.

Parameters:

parity - the sign (0 = top, 1 = bottom, 2 = odd, 3 = even)

Method Detail

top

public Parity top()

Specified by:

top in interface it.unive.lisa.analysis.Lattice<Parity>

bottom

public Parity bottom()

Specified by:

bottom in interface it.unive.lisa.analysis.Lattice<Parity>

representation

public it.unive.lisa.analysis.representation.DomainRepresentation representation()

Specified by:

representation in interface it.unive.lisa.analysis.nonrelational.NonRelationalElement<Parity,it.unive.lisa.symbolic.value.ValueExpression,it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity>>

evalNullConstant

public Parity evalNullConstant(it.unive.lisa.program.cfg.ProgramPoint pp)

Specified by:

evalNullConstant in interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>

evalNonNullConstant

public Parity evalNonNullConstant(it.unive.lisa.symbolic.value.Constant constant,
                                  it.unive.lisa.program.cfg.ProgramPoint pp)

Specified by:

evalNonNullConstant in interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>

isEven

public boolean isEven()

Yields whether or not this is the even parity.

Returns:

true if that condition holds

isOdd

public boolean isOdd()

Yields whether or not this is the odd parity.

Returns:

true if that condition holds

evalUnaryExpression

public Parity evalUnaryExpression(it.unive.lisa.symbolic.value.operator.unary.UnaryOperator operator,
                                  Parity arg,
                                  it.unive.lisa.program.cfg.ProgramPoint pp)

Specified by:

evalUnaryExpression in interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>

evalBinaryExpression

public Parity evalBinaryExpression(it.unive.lisa.symbolic.value.operator.binary.BinaryOperator operator,
                                   Parity left,
                                   Parity right,
                                   it.unive.lisa.program.cfg.ProgramPoint pp)

Specified by:

evalBinaryExpression in interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>

lubAux

public Parity lubAux(Parity other)
              throws it.unive.lisa.analysis.SemanticException

Specified by:

lubAux in interface it.unive.lisa.analysis.BaseLattice<Parity>

Throws:

it.unive.lisa.analysis.SemanticException

lessOrEqualAux

public boolean lessOrEqualAux(Parity other)
                       throws it.unive.lisa.analysis.SemanticException

Specified by:

lessOrEqualAux in interface it.unive.lisa.analysis.BaseLattice<Parity>

Throws:

it.unive.lisa.analysis.SemanticException

hashCode

public int hashCode()

Specified by:

hashCode in interface it.unive.lisa.analysis.BaseLattice<Parity>

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Specified by:

equals in interface it.unive.lisa.analysis.BaseLattice<Parity>

Overrides:

equals in class java.lang.Object

assumeBinaryExpression

public it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity> assumeBinaryExpression(it.unive.lisa.analysis.nonrelational.value.ValueEnvironment<Parity> environment,
                                                                                                  it.unive.lisa.symbolic.value.operator.binary.BinaryOperator operator,
                                                                                                  it.unive.lisa.symbolic.value.ValueExpression left,
                                                                                                  it.unive.lisa.symbolic.value.ValueExpression right,
                                                                                                  it.unive.lisa.program.cfg.ProgramPoint src,
                                                                                                  it.unive.lisa.program.cfg.ProgramPoint dest)
                                                                                           throws it.unive.lisa.analysis.SemanticException

Specified by:

assumeBinaryExpression in interface it.unive.lisa.analysis.nonrelational.value.BaseNonRelationalValueDomain<Parity>

Throws:

it.unive.lisa.analysis.SemanticException