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java.lang.Object | +--soot.toolkits.scalar.FlowAnalysis | +--soot.toolkits.scalar.BackwardFlowAnalysis | +--soot.jimple.toolkits.scalar.pre.DownSafetyAnalysis
Performs an DownSafe-analysis on the given graph. An expression is downsafe, if the computation will occur on every path from the current point down to the END.
Field Summary |
Fields inherited from class soot.toolkits.scalar.FlowAnalysis |
graph, unitToAfterFlow, unitToBeforeFlow |
Constructor Summary | |
DownSafetyAnalysis(DirectedGraph dg)
this constructor should not be used, and will throw a runtime-exception! |
|
DownSafetyAnalysis(DirectedGraph dg,
java.util.Map unitToGen,
SideEffectTester sideEffect)
this constructor automaticly performs the DownSafety-analysis. the result of the analysis is as usual in FlowBefore (getFlowBefore()) and FlowAfter (getFlowAfter()). |
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DownSafetyAnalysis(DirectedGraph dg,
java.util.Map unitToGen,
SideEffectTester sideEffect,
BoundedFlowSet set)
this constructor automaticly performs the DownSafety-analysis. the result of the analysis is as usual in FlowBefore (getFlowBefore()) and FlowAfter (getFlowAfter()). as sets-operations are usually more efficient, if the original set comes from the same source, this allows to share sets. |
Method Summary | |
protected void |
copy(java.lang.Object source,
java.lang.Object dest)
Creates a copy of the source flow object in dest . |
protected void |
customizeInitialFlowGraph()
Customize the initial flow graph. |
protected void |
flowThrough(java.lang.Object inValue,
java.lang.Object unit,
java.lang.Object outValue)
Given the merge of the out sets, compute the in set for s . |
protected void |
merge(java.lang.Object in1,
java.lang.Object in2,
java.lang.Object out)
Compute the merge of the in1 and in2 sets, putting the result into out . |
protected java.lang.Object |
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 |
entryInitialFlow, getFlowAfter, getFlowBefore |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public DownSafetyAnalysis(DirectedGraph dg)
public DownSafetyAnalysis(DirectedGraph dg, java.util.Map unitToGen, SideEffectTester sideEffect)
dg
- a CompleteUnitGraph.unitToGen
- the equivalentValue of each unit.sideEffect
- the SideEffectTester that performs kills.public DownSafetyAnalysis(DirectedGraph dg, java.util.Map unitToGen, SideEffectTester sideEffect, BoundedFlowSet set)
dg
- a CompleteUnitGraph.unitToGen
- the equivalentValue of each unit.sideEffect
- the SideEffectTester that performs kills.Method Detail |
protected java.lang.Object newInitialFlow()
FlowAnalysis
newInitialFlow
in class FlowAnalysis
protected void customizeInitialFlowGraph()
FlowAnalysis
customizeInitialFlowGraph
in class FlowAnalysis
protected void flowThrough(java.lang.Object inValue, java.lang.Object unit, java.lang.Object outValue)
FlowAnalysis
out
sets, compute the in
set for s
.
flowThrough
in class FlowAnalysis
protected void merge(java.lang.Object in1, java.lang.Object in2, java.lang.Object out)
FlowAnalysis
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.
merge
in class FlowAnalysis
protected void copy(java.lang.Object source, java.lang.Object dest)
FlowAnalysis
source
flow object in dest
.
copy
in class FlowAnalysis
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