com.ibm.wala.ipa.callgraph.propagation
Class UnarySideEffect

java.lang.Object
  com.ibm.wala.fixedpoint.impl.AbstractOperator
      com.ibm.wala.fixedpoint.impl.UnaryOperator
          com.ibm.wala.ipa.callgraph.propagation.UnarySideEffect

All Implemented Interfaces:

FixedPointConstants

Direct Known Subclasses:

PropagationCallGraphBuilder.ArrayLoadOperator, PropagationCallGraphBuilder.ArrayStoreOperator, PropagationCallGraphBuilder.GetFieldOperator, PropagationCallGraphBuilder.PutFieldOperator

public abstract class UnarySideEffect
extends UnaryOperator

A SideEffect is a constraint which carries a points-to-set which is def'fed or used in created constraints. The side effect doesn't actually def or use the fixedSet itself ... rather, the side effect creates new constraints that def or use the fixed set. A "load" operator generates defs of the fixed set. A "store" operator generates uses of the fixed set.

Field Summary

Fields inherited from interface com.ibm.wala.fixpoint.FixedPointConstants

CHANGED, CHANGED_AND_FIXED, CHANGED_MASK, FIXED_MASK, NOT_CHANGED, NOT_CHANGED_AND_FIXED, SIDE_EFFECT_MASK

Constructor Summary

UnarySideEffect(PointsToSetVariable fixedSet)

Method Summary

boolean	equals(java.lang.Object o)
abstract byte	evaluate(IVariable rhs)
byte	evaluate(IVariable lhs, IVariable rhs) Evaluate this equation, setting a new value for the left-hand side.
int	hashCode()
protected abstract boolean	isLoadOperator() A "load" operator generates defs of the fixed set.
void	replaceFixedSet(PointsToSetVariable p) Update the fixed points-to-set associated with this side effect.

Methods inherited from class com.ibm.wala.fixedpoint.impl.UnaryOperator

evaluate, isIdentity, makeEquation

Methods inherited from class com.ibm.wala.fixedpoint.impl.AbstractOperator

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

UnarySideEffect

public UnarySideEffect(PointsToSetVariable fixedSet)

Method Detail

evaluate

public final byte evaluate(IVariable lhs,
                           IVariable rhs)

Description copied from class: UnaryOperator

Evaluate this equation, setting a new value for the left-hand side.

Specified by:

evaluate in class UnaryOperator

Returns:

true if the lhs value changes. false otherwise.

evaluate

public abstract byte evaluate(IVariable rhs)

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in class AbstractOperator

hashCode

public int hashCode()

Specified by:

hashCode in class AbstractOperator

isLoadOperator

protected abstract boolean isLoadOperator()

A "load" operator generates defs of the fixed set. A "store" operator generates uses of the fixed set.

replaceFixedSet

public void replaceFixedSet(PointsToSetVariable p)

Update the fixed points-to-set associated with this side effect.