Package it.unive.lisa.interprocedural

Class ReturnTopPolicy

java.lang.Object

it.unive.lisa.interprocedural.ReturnTopPolicy

All Implemented Interfaces:

OpenCallPolicy

public class ReturnTopPolicy
extends java.lang.Object
implements OpenCallPolicy

An OpenCallPolicy, where the post state is exactly the entry state, with the only difference of having a synthetic variable named "open_call_return" assigned to top only if the call returns a value. This variable, that is also stored as computed expression, represent the unknown result of the call, if any.

Field Summary

Fields

Modifier and Type	Field	Description
static ReturnTopPolicy	INSTANCE	The singleton instance of this class.

Fields inherited from interface it.unive.lisa.interprocedural.OpenCallPolicy

RETURNED_VARIABLE_NAME

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>	apply(OpenCall call, AnalysisState<A,H,V,T> entryState, ExpressionSet<SymbolicExpression>[] params)	Applies the policy to the given open call.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ReturnTopPolicy INSTANCE

The singleton instance of this class.

Method Detail

apply

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> apply(OpenCall call,
                                                                                                                                                                                                      AnalysisState<A,H,V,T> entryState,
                                                                                                                                                                                                      ExpressionSet<SymbolicExpression>[] params)
                                                                                                                                                                                               throws SemanticException

Description copied from interface: OpenCallPolicy

Applies the policy to the given open call.

Specified by:

apply in interface OpenCallPolicy

Type Parameters:

A - the type of AbstractState contained into the analysis state

H - the type of HeapDomain contained into the computed abstract state

V - the type of ValueDomain contained into the computed abstract state

T - the type of TypeDomain contained into the computed abstract state

Parameters:

call - the OpenCall under evaluation

entryState - the state when the call is executed

params - the symbolic expressions representing the computed values of the parameters of the call

Returns:

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

Throws:

SemanticException - if something goes wrong during the computation