Package proguard.analysis.cpa.jvm.operators

Class JvmDefaultReduceOperator<StateT extends LatticeAbstractState<StateT>>

java.lang.Object

proguard.analysis.cpa.jvm.operators.JvmDefaultReduceOperator<StateT>

All Implemented Interfaces:

ReduceOperator<JvmCfaNode,JvmCfaEdge,MethodSignature>, JvmAbstractStateFactory<StateT>

Direct Known Subclasses:

JvmTaintReduceOperator, JvmValueReduceOperator

public class JvmDefaultReduceOperator<StateT extends LatticeAbstractState<StateT>>
extends java.lang.Object
implements ReduceOperator<JvmCfaNode,JvmCfaEdge,MethodSignature>, JvmAbstractStateFactory<StateT>

This ReduceOperator simulates the JVM behavior on a method call. It takes a clone of the caller JvmAbstractState, creates an empty stack and a local variables array with the callee arguments.

Constructor Summary

Constructors

Constructor	Description
JvmDefaultReduceOperator()	Create the default reduce operator for the JVM.
JvmDefaultReduceOperator(boolean reduceHeap)	Create the default reduce operator for the JVM.

Method Summary

Modifier and Type	Method	Description
protected void	reduceHeap(JvmHeapAbstractState<StateT> heap, JvmFrameAbstractState<StateT> reducedFrame, MapAbstractState<java.lang.String,StateT> reducedStaticFields)	Reduces the heap state.
JvmAbstractState<StateT>	reduceImpl(AbstractState expandedInitialState, JvmCfaNode blockEntryNode, Call call)	Creates the initial state of the called procedure discarding the useless information from the state of the caller.
protected void	reduceStaticFields(MapAbstractState<java.lang.String,StateT> staticFields)	Reduces the static fields.

Methods inherited from class java.lang.Object

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

Methods inherited from interface proguard.analysis.cpa.jvm.state.JvmAbstractStateFactory

createJvmAbstractState

Methods inherited from interface proguard.analysis.cpa.bam.ReduceOperator

onMethodEntry, reduce

Constructor Detail

JvmDefaultReduceOperator

public JvmDefaultReduceOperator()

Create the default reduce operator for the JVM.

JvmDefaultReduceOperator

public JvmDefaultReduceOperator(boolean reduceHeap)

Create the default reduce operator for the JVM.

Parameters:

reduceHeap - whether reduction of the heap is performed

Method Detail

reduceImpl

public JvmAbstractState<StateT> reduceImpl(AbstractState expandedInitialState,
                                           JvmCfaNode blockEntryNode,
                                           Call call)

Description copied from interface: ReduceOperator

Creates the initial state of the called procedure discarding the useless information from the state of the caller.

Specified by:

reduceImpl in interface ReduceOperator<JvmCfaNode,JvmCfaEdge,MethodSignature>

Parameters:

expandedInitialState - the entry state of the called procedure before any reduction

blockEntryNode - the entry node of the called procedure

call - the information of the call to the procedure

Returns:

The entry state of the called procedure

reduceStaticFields

protected void reduceStaticFields(MapAbstractState<java.lang.String,StateT> staticFields)

Reduces the static fields. The default implementation doesn't perform any reduction.

Parameters:

staticFields - the static fields map that is modified by this method by performing reduction

reduceHeap

protected void reduceHeap(JvmHeapAbstractState<StateT> heap,
                          JvmFrameAbstractState<StateT> reducedFrame,
                          MapAbstractState<java.lang.String,StateT> reducedStaticFields)

Reduces the heap state. The default implementation doesn't perform any reduction.

Parameters:

heap - the heap that is modified by this method by performing reduction

reducedFrame - the frame after reduction has been performed on it

reducedStaticFields - the static fields after reduction has been performed on them