Package com.ibm.wala.cast.ipa.callgraph

Class ScopeMappingInstanceKeys.ScopeMappingInstanceKey

java.lang.Object

com.ibm.wala.cast.ipa.callgraph.ScopeMappingInstanceKeys.ScopeMappingInstanceKey

All Implemented Interfaces:

ContextItem, InstanceKey

Enclosing class:

ScopeMappingInstanceKeys

public class ScopeMappingInstanceKeys.ScopeMappingInstanceKey
extends Object
implements InstanceKey

An InstanceKey carrying information about which CGNodes represent lexical parents of the allocating CGNode.

The fact that we discover at most one CGNode per lexical parent relies on the following property: in a call graph, the contexts used for a nested function can be finer than those used for the containing function, but _not_ coarser. This ensures that there is at most one CGNode corresponding to a lexical parent (e.g., we don't get two clones of function f1() invoking a single CGNode representing nested function f2())

Note that it is possible to not find a CGNode corresponding to some lexical parent; this occurs when a deeply nested function is returned before being invoked, so some lexical parent is no longer on the call stack when the function is allocated. See test case nested.js.

Nested Class Summary

Nested classes/interfaces inherited from interface com.ibm.wala.ipa.callgraph.ContextItem

ContextItem.Value<T>

Constructor Summary

Constructors

Constructor	Description
ScopeMappingInstanceKey(CGNode creator, InstanceKey base)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
InstanceKey	getBase()
IClass	getConcreteType()	For now, we assert that each InstanceKey represents a set of classes which are all of the same concrete type (modulo the fact that all arrays of references are considered concrete type []Object;)
Iterator<Pair<CGNode,NewSiteReference>>	getCreationSites(CallGraph CG)	Get the creation sites of this, i.e., the statements that may allocate objects represented by this.
CGNode	getCreator()
Iterator<CGNode>	getFunargNodes(Pair<String,String> name)	get the CGNode representing the lexical parent of creator with name definer
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

ScopeMappingInstanceKey

public ScopeMappingInstanceKey(CGNode creator,
 InstanceKey base)

Method Details

getConcreteType

public IClass getConcreteType()

Description copied from interface: InstanceKey

For now, we assert that each InstanceKey represents a set of classes which are all of the same concrete type (modulo the fact that all arrays of references are considered concrete type []Object;)

Specified by:

getConcreteType in interface InstanceKey

getFunargNodes

public Iterator<CGNode> getFunargNodes(Pair<String,String> name)

get the CGNode representing the lexical parent of creator with name definer

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

getBase

public InstanceKey getBase()

getCreator

public CGNode getCreator()

getCreationSites

public Iterator<Pair<CGNode,NewSiteReference>> getCreationSites(CallGraph CG)

Description copied from interface: InstanceKey

Get the creation sites of this, i.e., the statements that may allocate objects represented by this. A creation site is a pair (n,s), where n is the containing CGNode in the given CallGraph CG and s is the allocating NewSiteReference.

Specified by:

getCreationSites in interface InstanceKey