Package it.unive.lisa.program.cfg.statement

Class Assignment

java.lang.Object

it.unive.lisa.program.cfg.statement.Statement

it.unive.lisa.program.cfg.statement.Expression

it.unive.lisa.program.cfg.statement.NaryExpression

it.unive.lisa.program.cfg.statement.BinaryExpression

it.unive.lisa.program.cfg.statement.Assignment

All Implemented Interfaces:

ProgramPoint, CodeElement, CodeNode<CFG,Statement,Edge>, Node<CFG,Statement,Edge>, java.lang.Comparable<Statement>

public class Assignment
extends BinaryExpression

A statement assigning the result of an expression to an assignable expression.

Field Summary

Fields inherited from class it.unive.lisa.program.cfg.statement.Statement

offset

Constructor Summary

Constructors

Constructor	Description
Assignment(CFG cfg, CodeLocation location, EvaluationOrder order, Expression target, Expression expression)	Builds the assignment, assigning expression to target, happening at the given location in the program.
Assignment(CFG cfg, CodeLocation location, EvaluationOrder order, Type staticType, Expression target, Expression expression)	Builds the assignment, assigning expression to target, happening at the given location in the program.
Assignment(CFG cfg, CodeLocation location, Expression target, Expression expression)	Builds the assignment, assigning expression to target, happening at the given location in the program.
Assignment(CFG cfg, CodeLocation location, Type staticType, Expression target, Expression expression)	Builds the assignment, assigning expression to target, happening at the given location in the program.

Method Summary

Modifier and Type	Method	Description
<A extends AbstractState<A,H,V,T>,H extends HeapDomain<H>,V extends ValueDomain<V>,T extends TypeDomain<T>> AnalysisState<A,H,V,T>	binarySemantics(InterproceduralAnalysis<A,H,V,T> interprocedural, AnalysisState<A,H,V,T> state, SymbolicExpression left, SymbolicExpression right, StatementStore<A,H,V,T> expressions)	Computes the semantics of the expression, after the semantics of the sub-expressions have been computed.
java.lang.String	toString()

Methods inherited from class it.unive.lisa.program.cfg.statement.BinaryExpression

expressionSemantics, getLeft, getRight

Methods inherited from class it.unive.lisa.program.cfg.statement.NaryExpression

accept, equals, getConstructName, getOrder, getStatementEvaluatedBefore, getSubExpressions, hashCode, semantics, setOffset

Methods inherited from class it.unive.lisa.program.cfg.statement.Expression

getMetaVariables, getParentStatement, getRootStatement, getStaticType, setParentStatement

Methods inherited from class it.unive.lisa.program.cfg.statement.Statement

compareTo, getCFG, getEvaluationPredecessor, getLocation, getOffset, stopsExecution, throwsError

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unive.lisa.program.cfg.ProgramPoint

getProgram

Constructor Detail

Assignment

public Assignment(CFG cfg,
                  CodeLocation location,
                  Expression target,
                  Expression expression)

Builds the assignment, assigning expression to target, happening at the given location in the program. The static type of this expression is Untyped. The EvaluationOrder is RightToLeftEvaluation.

Parameters:

cfg - the cfg that this statement belongs to

location - the location where this statement is defined within the program

target - the target of the assignment

expression - the expression to assign to target

Assignment

public Assignment(CFG cfg,
                  CodeLocation location,
                  EvaluationOrder order,
                  Expression target,
                  Expression expression)

Builds the assignment, assigning expression to target, happening at the given location in the program. The static type of this expression is Untyped.

Parameters:

cfg - the cfg that this statement belongs to

location - the location where this statement is defined within the program

order - the evaluation order of the sub-expressions

target - the target of the assignment

expression - the expression to assign to target

Assignment

public Assignment(CFG cfg,
                  CodeLocation location,
                  Type staticType,
                  Expression target,
                  Expression expression)

Builds the assignment, assigning expression to target, happening at the given location in the program. The EvaluationOrder is RightToLeftEvaluation.

Parameters:

cfg - the cfg that this statement belongs to

location - the location where this statement is defined within the program

staticType - the static type of this expression

target - the target of the assignment

expression - the expression to assign to target

Assignment

public Assignment(CFG cfg,
                  CodeLocation location,
                  EvaluationOrder order,
                  Type staticType,
                  Expression target,
                  Expression expression)

Builds the assignment, assigning expression to target, happening at the given location in the program.

Parameters:

cfg - the cfg that this statement belongs to

location - the location where this statement is defined within the program

order - the evaluation order of the sub-expressions

staticType - the static type of this expression

target - the target of the assignment

expression - the expression to assign to target

Method Detail

toString

public final java.lang.String toString()

Overrides:

toString in class NaryExpression

binarySemantics

public <A extends AbstractState<A,H,V,T>,H extends HeapDomain<H>,V extends ValueDomain<V>,T extends TypeDomain<T>> AnalysisState<A,H,V,T> binarySemantics(InterproceduralAnalysis<A,H,V,T> interprocedural,
                                                                                                                                                                                                                AnalysisState<A,H,V,T> state,
                                                                                                                                                                                                                SymbolicExpression left,
                                                                                                                                                                                                                SymbolicExpression right,
                                                                                                                                                                                                                StatementStore<A,H,V,T> expressions)
                                                                                                                                                                                                         throws SemanticException

Description copied from class: BinaryExpression

Computes the semantics of the expression, after the semantics of the sub-expressions have been computed. Meta variables from the sub-expressions will be forgotten after this expression returns.

Specified by:

binarySemantics in class BinaryExpression

Type Parameters:

A - the type of AbstractState

H - the type of the HeapDomain

V - the type of the ValueDomain

T - the type of TypeDomain

Parameters:

interprocedural - the interprocedural analysis of the program to analyze

state - the state where the expression is to be evaluated

left - the symbolic expression representing the computed value of the first sub-expression of this expression

right - the symbolic expression representing the computed value of the second sub-expression of this expression

expressions - the cache where analysis states of intermediate expressions are stored and that can be accessed to query for post-states of parameters expressions

Returns:

the AnalysisState representing the abstract result of the execution of this expression

Throws:

SemanticException - if something goes wrong during the computation