Package it.unive.lisa.interprocedural.callgraph

Class BaseCallGraph

java.lang.Object

it.unive.lisa.util.datastructures.graph.BaseGraph<CallGraph,CallGraphNode,CallGraphEdge>

it.unive.lisa.interprocedural.callgraph.CallGraph

it.unive.lisa.interprocedural.callgraph.BaseCallGraph

All Implemented Interfaces:

Graph<CallGraph,CallGraphNode,CallGraphEdge>

public abstract class BaseCallGraph
extends CallGraph

An instance of CallGraph that provides the basic mechanism to resolve UnresolvedCalls.

The graph underlying this call graph is built lazily through each call to resolve: querying for information about the graph before the completion of the analysis might lead to wrong results.

Field Summary

Fields inherited from class it.unive.lisa.util.datastructures.graph.BaseGraph

adjacencyMatrix, entrypoints

Constructor Summary

Constructors

Constructor	Description
BaseCallGraph()

Method Summary

Modifier and Type	Method	Description
void	checkMember(UnresolvedCall call, java.util.Set<Type>[] types, java.util.Collection<CFG> targets, java.util.Collection<NativeCFG> natives, SymbolAliasing aliasing, CodeMember cm, boolean instance)	Checks if the given code member cm is a candidate target for the given call, and proceeds to add it to the set of targets if it is.
java.util.Collection<Call>	getCallSites(CodeMember cm)	Yields all the Calls that target the given CodeMember.
abstract java.util.Collection<Type>	getPossibleTypesOfReceiver(Expression receiver, java.util.Set<Type> types)	Returns all the possible types of the given expression that should be considered as possible receivers of the call.
void	init(Application app)	Initializes the call graph of the given program.
boolean	matchCodeMemberName(UnresolvedCall call, java.lang.String qualifier, java.lang.String name)	Matches the name (qualifier + target name) of the given call against the given code member.
void	registerCall(CFGCall call)	Registers an already resolved CFGCall in this CallGraph.
Call	resolve(UnresolvedCall call, java.util.Set<Type>[] types, SymbolAliasing aliasing)	Yields a Call implementation that corresponds to the resolution of the given UnresolvedCall.
void	resolveInstance(UnresolvedCall call, java.util.Set<Type>[] types, java.util.Collection<CFG> targets, java.util.Collection<NativeCFG> natives, SymbolAliasing aliasing)	Resolves the given call as an instance call.
void	resolveNonInstance(UnresolvedCall call, java.util.Set<Type>[] types, java.util.Collection<CFG> targets, java.util.Collection<NativeCFG> natives, SymbolAliasing aliasing)	Resolves the given call as regular (non-instance) call.

Methods inherited from class it.unive.lisa.interprocedural.callgraph.CallGraph

getCallees, getCallees, getCalleesTransitively, getCalleesTransitively, getCallers, getCallers, getCallersTransitively, getCallersTransitively, getCallSites, getRecursions, getRecursionsContaining

Methods inherited from class it.unive.lisa.util.datastructures.graph.BaseGraph

addEdge, addNode, addNode, containsEdge, containsNode, followersOf, getAdjacencyMatrix, getEdgeConnecting, getEdges, getEdgesConnecting, getEdgesCount, getEntrypoints, getIngoingEdges, getNodes, getNodesCount, getOutgoingEdges, isEqualTo, predecessorsOf, toSerializableGraph, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unive.lisa.util.datastructures.graph.Graph

accept, getCycleEntries, toSerializableGraph

Constructor Detail

BaseCallGraph

public BaseCallGraph()

Method Detail

init

public void init(Application app)
          throws CallGraphConstructionException

Description copied from class: CallGraph

Initializes the call graph of the given program. A call to this method should effectively re-initialize the call graph as if it is yet to be used. This is useful when the same instance is used in multiple analyses.

Overrides:

init in class CallGraph

Parameters:

app - the application to analyze

Throws:

CallGraphConstructionException - if an exception happens while building the call graph

registerCall

public void registerCall(CFGCall call)

Description copied from class: CallGraph

Registers an already resolved CFGCall in this CallGraph.

Specified by:

registerCall in class CallGraph

Parameters:

call - the call to register

resolve

public Call resolve(UnresolvedCall call,
                    java.util.Set<Type>[] types,
                    SymbolAliasing aliasing)
             throws CallResolutionException

Description copied from class: CallGraph

Yields a Call implementation that corresponds to the resolution of the given UnresolvedCall.

Specified by:

resolve in class CallGraph

Parameters:

call - the call to resolve

types - the runtime types of the parameters of the call

aliasing - the symbol aliasing information, might be null

Returns:

a collection of all the possible runtime targets

Throws:

CallResolutionException - if this call graph is unable to resolve the given call

resolveNonInstance

public void resolveNonInstance(UnresolvedCall call,
                               java.util.Set<Type>[] types,
                               java.util.Collection<CFG> targets,
                               java.util.Collection<NativeCFG> natives,
                               SymbolAliasing aliasing)
                        throws CallResolutionException

Resolves the given call as regular (non-instance) call.

Parameters:

call - the call to resolve

types - the runtime types of the parameters of the call

targets - the list of targets that, after the execution of this method, will contain the CFGs targeted by the call

natives - the list of targets that, after the execution of this method, will contain the NativeCFGs targeted by the call

aliasing - the symbol aliasing information

Throws:

CallResolutionException - if something goes wrong while resolving the call

resolveInstance

public void resolveInstance(UnresolvedCall call,
                            java.util.Set<Type>[] types,
                            java.util.Collection<CFG> targets,
                            java.util.Collection<NativeCFG> natives,
                            SymbolAliasing aliasing)
                     throws CallResolutionException

Resolves the given call as an instance call.

Parameters:

call - the call to resolve

types - the runtime types of the parameters of the call

targets - the list of targets that, after the execution of this method, will contain the CFGs targeted by the call

natives - the list of targets that, after the execution of this method, will contain the NativeCFGs targeted by the call

aliasing - the symbol aliasing information

Throws:

CallResolutionException - if something goes wrong while resolving the call

checkMember

public void checkMember(UnresolvedCall call,
                        java.util.Set<Type>[] types,
                        java.util.Collection<CFG> targets,
                        java.util.Collection<NativeCFG> natives,
                        SymbolAliasing aliasing,
                        CodeMember cm,
                        boolean instance)

Checks if the given code member cm is a candidate target for the given call, and proceeds to add it to the set of targets if it is. Aliasing information is used here to match code members that have been aliased and that can be targeted by calls that refer to other names. Note that AbstractCodeMembers are always discarded.

Parameters:

call - the call to match

types - the runtime types of the parameters of the call

targets - the list of targets that, after the execution of this method, will contain the CFGs targeted by the call

natives - the list of targets that, after the execution of this method, will contain the NativeCFGs targeted by the call

aliasing - the symbol aliasing information

cm - the code member to match

instance - whether or not the only instance or non-instance members should be matched

matchCodeMemberName

public boolean matchCodeMemberName(UnresolvedCall call,
                                   java.lang.String qualifier,
                                   java.lang.String name)

Matches the name (qualifier + target name) of the given call against the given code member.

Parameters:

call - the call to match

qualifier - the qualifier (name of the defining unit) of the code member

name - the name of the code member

Returns:

true if the qualifier and name are compatible with the ones of the call's target

getPossibleTypesOfReceiver

public abstract java.util.Collection<Type> getPossibleTypesOfReceiver(Expression receiver,
                                                                      java.util.Set<Type> types)
                                                               throws CallResolutionException

Returns all the possible types of the given expression that should be considered as possible receivers of the call. How we choose this set varies from the call graph algorithm we decide to adopt (e.g., CHA, RTA, 0-CFA, ...)

Parameters:

receiver - an expression

types - the runtime types of the receiver

Returns:

the possible types to use as receivers

Throws:

CallResolutionException - if the types cannot be computed

getCallSites

public java.util.Collection<Call> getCallSites(CodeMember cm)

Description copied from class: CallGraph

Yields all the Calls that target the given CodeMember. The returned collection might contain partial results if this call graph is not fully built.

Specified by:

getCallSites in class CallGraph

Parameters:

cm - the target code member

Returns:

the collection of calls that target the code member