Package soot.jbco.jimpleTransformations

Class New2InitFlowAnalysis

java.lang.Object

soot.toolkits.scalar.AbstractFlowAnalysis<N,A>

soot.toolkits.scalar.FlowAnalysis<N,A>

soot.toolkits.scalar.BackwardFlowAnalysis<Unit,FlowSet>

soot.jbco.jimpleTransformations.New2InitFlowAnalysis

public class New2InitFlowAnalysis
extends BackwardFlowAnalysis<Unit,FlowSet>

Author:

Michael Batchelder Created on 10-Jul-2006

Nested Class Summary

Nested classes/interfaces inherited from class soot.toolkits.scalar.FlowAnalysis

FlowAnalysis.Flow

Field Summary

Fields inherited from class soot.toolkits.scalar.FlowAnalysis

filterUnitToAfterFlow, unitToAfterFlow

Fields inherited from class soot.toolkits.scalar.AbstractFlowAnalysis

filterUnitToBeforeFlow, graph, unitToBeforeFlow

Constructor Summary

Constructors

Constructor	Description
New2InitFlowAnalysis(DirectedGraph<Unit> graph)

Method Summary

Modifier and Type	Method	Description
protected void	copy(FlowSet source, FlowSet dest)	Creates a copy of the source flow object in dest.
protected FlowSet	entryInitialFlow()	Returns the initial flow value for entry/exit graph nodes.
protected void	flowThrough(FlowSet in, Unit d, FlowSet out)	Given the merge of the out sets, compute the in set for s (or in to out, depending on direction).
protected void	merge(FlowSet in1, FlowSet in2, FlowSet out)	Compute the merge of the in1 and in2 sets, putting the result into out.
protected FlowSet	newInitialFlow()	Returns the flow object corresponding to the initial values for each graph node.

Methods inherited from class soot.toolkits.scalar.BackwardFlowAnalysis

doAnalysis, isForward

Methods inherited from class soot.toolkits.scalar.FlowAnalysis

copyFreshToExisting, getFlow, getFlowAfter, getFlowBefore, omissible

Methods inherited from class soot.toolkits.scalar.AbstractFlowAnalysis

merge, mergeInto, treatTrapHandlersAsEntries

Methods inherited from class java.lang.Object

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

Constructor Detail

New2InitFlowAnalysis

public New2InitFlowAnalysis(DirectedGraph<Unit> graph)

Method Detail

flowThrough

protected void flowThrough(FlowSet in,
                           Unit d,
                           FlowSet out)

Description copied from class: FlowAnalysis

Given the merge of the out sets, compute the in set for s (or in to out, depending on direction). This function often causes confusion, because the same interface is used for both forward and backward flow analyses. The first parameter is always the argument to the flow function (i.e. it is the "in" set in a forward analysis and the "out" set in a backward analysis), and the third parameter is always the result of the flow function (i.e. it is the "out" set in a forward analysis and the "in" set in a backward analysis).

Specified by:

flowThrough in class FlowAnalysis<Unit,FlowSet>

Parameters:

in - the input flow

d - the current node

out - the returned flow

newInitialFlow

protected FlowSet newInitialFlow()

Description copied from class: AbstractFlowAnalysis

Returns the flow object corresponding to the initial values for each graph node.

Specified by:

newInitialFlow in class AbstractFlowAnalysis<Unit,FlowSet>

entryInitialFlow

protected FlowSet entryInitialFlow()

Description copied from class: AbstractFlowAnalysis

Returns the initial flow value for entry/exit graph nodes. This is equal to AbstractFlowAnalysis.newInitialFlow()

Overrides:

entryInitialFlow in class AbstractFlowAnalysis<Unit,FlowSet>

merge

protected void merge(FlowSet in1,
                     FlowSet in2,
                     FlowSet out)

Description copied from class: AbstractFlowAnalysis

Compute the merge of the in1 and in2 sets, putting the result into out. The behavior of this function depends on the implementation ( it may be necessary to check whether in1 and in2 are equal or aliased ). Used by the doAnalysis method.

Specified by:

merge in class AbstractFlowAnalysis<Unit,FlowSet>

copy

protected void copy(FlowSet source,
                    FlowSet dest)

Description copied from class: AbstractFlowAnalysis

Creates a copy of the source flow object in dest.

Specified by:

copy in class AbstractFlowAnalysis<Unit,FlowSet>