Class RecursionBoundContextSelector

java.lang.Object

com.ibm.wala.cast.js.ipa.callgraph.RecursionBoundContextSelector

All Implemented Interfaces:

ContextSelector

public class RecursionBoundContextSelector
extends Object
implements ContextSelector

A context selector that attempts to detect recursion beyond some depth in a base selector. If such recursion is detected, the base selector's context is replaced with Everywhere.EVERYWHERE.

Constructor Summary

Constructors

Constructor	Description
RecursionBoundContextSelector(ContextSelector base, int recursionBound)

Method Summary

Modifier and Type	Method	Description
Context	getCalleeTarget(CGNode caller, CallSiteReference site, IMethod callee, InstanceKey[] actualParameters)	Given a calling node and a call site, returns the Context in which the callee should be evaluated.
IntSet	getRelevantParameters(CGNode caller, CallSiteReference site)	Given a calling node and a call site, return the set of parameters based on which this selector may choose to specialize contexts.

Methods inherited from class Object

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

Constructor Details

RecursionBoundContextSelector

public RecursionBoundContextSelector(ContextSelector base,
 int recursionBound)

Parameters:

recursionBound - bound on recursion depth, with the top level of the context returned by the base selector being depth 0. The Everywhere.EVERYWHERE context is returned if the base context exceeds this bound.

Method Details

getCalleeTarget

public Context getCalleeTarget(CGNode caller,
 CallSiteReference site,
 IMethod callee,
 InstanceKey[] actualParameters)

Description copied from interface: ContextSelector

Given a calling node and a call site, returns the Context in which the callee should be evaluated.

Specified by:

getCalleeTarget in interface ContextSelector

Parameters:

caller - the node containing the call site

site - description of the call site

actualParameters - the abstract objects (InstanceKeys) of parameters of interest to the selector

Returns:

the Context in which the callee should be evaluated, or null if no information is available.

getRelevantParameters

public IntSet getRelevantParameters(CGNode caller,
 CallSiteReference site)

Description copied from interface: ContextSelector

Given a calling node and a call site, return the set of parameters based on which this selector may choose to specialize contexts.

Specified by:

getRelevantParameters in interface ContextSelector

Parameters:

caller - the calling node

site - the specific call site

Returns:

the set of parameters of interest