com.ibm.wala.ipa.summaries

Class BypassMethodTargetSelector

java.lang.Object

com.ibm.wala.ipa.summaries.BypassMethodTargetSelector

All Implemented Interfaces:

MethodTargetSelector

public class BypassMethodTargetSelector
extends java.lang.Object
implements MethodTargetSelector

"Non-standard" bypass rules to use during call graph construction.

Normally, the method bypass rules replace the IMethod that is resolved by other means, via the getBypass() method. However, the bypass rules can be invoked even before resolving the target of a call, by checking the intercept rules.

Field Summary

Fields

Modifier and Type	Field and Description
protected IClassHierarchy	cha Governing class hierarchy.
protected MethodTargetSelector	parent target selector to use for non-bypassed calls

Constructor Summary

Constructors

Constructor and Description
BypassMethodTargetSelector(MethodTargetSelector parent, java.util.Map<MethodReference,MethodSummary> methodSummaries, java.util.Set<Atom> ignoredPackages, IClassHierarchy cha)

Method Summary

Modifier and Type	Method and Description
protected boolean	canIgnore(MemberReference m)
protected SyntheticMethod	findOrCreateSyntheticMethod(IMethod m, boolean isStatic)
protected SyntheticMethod	findOrCreateSyntheticMethod(MethodReference m, boolean isStatic)
MethodSummary	generateNoOp(MethodReference m, boolean isStatic) Generate a MethodSummary which is the "standard" representation of a method that does nothing.
static MethodSummary	generateStandardNoOp(Language l, MethodReference m, boolean isStatic) Generate a MethodSummary which is the "standard" representation of a method that does nothing.
IMethod	getCalleeTarget(CGNode caller, CallSiteReference site, IClass dispatchType) Check to see if a particular call site should be bypassed, before checking normal resolution of the receiver.
protected IClassHierarchy	getClassHierarchy()

Methods inherited from class java.lang.Object

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

Field Detail

cha

protected final IClassHierarchy cha

Governing class hierarchy.

parent

protected final MethodTargetSelector parent

target selector to use for non-bypassed calls

Constructor Detail

BypassMethodTargetSelector

public BypassMethodTargetSelector(MethodTargetSelector parent,
                                  java.util.Map<MethodReference,MethodSummary> methodSummaries,
                                  java.util.Set<Atom> ignoredPackages,
                                  IClassHierarchy cha)

Method Detail

getCalleeTarget

public IMethod getCalleeTarget(CGNode caller,
                               CallSiteReference site,
                               IClass dispatchType)

Check to see if a particular call site should be bypassed, before checking normal resolution of the receiver.

Specified by:

getCalleeTarget in interface MethodTargetSelector

Parameters:

caller - the GCNode in the call graph containing the call

site - the call site reference of the call site

dispatchType - the type of the target object or null

Returns:

the method to be called.

Throws:

java.lang.IllegalArgumentException - if site is null

findOrCreateSyntheticMethod

protected SyntheticMethod findOrCreateSyntheticMethod(MethodReference m,
                                                      boolean isStatic)

Parameters:

m - a method reference

Returns:

a SyntheticMethod corresponding to m; or null if none is available.

findOrCreateSyntheticMethod

protected SyntheticMethod findOrCreateSyntheticMethod(IMethod m,
                                                      boolean isStatic)

Parameters:

m - a method reference

Returns:

a SyntheticMethod corresponding to m; or null if none is available.

generateStandardNoOp

public static MethodSummary generateStandardNoOp(Language l,
                                                 MethodReference m,
                                                 boolean isStatic)

Generate a MethodSummary which is the "standard" representation of a method that does nothing.

generateNoOp

public MethodSummary generateNoOp(MethodReference m,
                                  boolean isStatic)

Generate a MethodSummary which is the "standard" representation of a method that does nothing. Subclasses may override this method to implement alternative semantics concerning what "do nothing" means.

canIgnore

protected boolean canIgnore(MemberReference m)

Returns:

true iff we can treat m as a no-op method

getClassHierarchy

protected IClassHierarchy getClassHierarchy()