Package com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt

Class AbstractEStatementOptimizer

java.lang.Object

com.pnfsoftware.jeb.core.AbstractPlugin

com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.AbstractOptimizer<IERoutineContext>

com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEOptimizer

com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEStatementOptimizer

All Implemented Interfaces:

IPlugin, IEOptimizer, IOptimizer<IERoutineContext>

public abstract class AbstractEStatementOptimizer
extends AbstractEOptimizer

Skeleton for an IRE statement optimizer.

Field Summary

Fields inherited from class com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEOptimizer

cfg, ectx

Fields inherited from class com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.AbstractOptimizer

logger

Fields inherited from interface com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.IOptimizer

DEAD_CODE_REMOVER, DEOBFUSCATOR, PRIORITY_HIGH, PRIORITY_LOW, PRIORITY_STANDARD

Constructor Summary

Constructors

Constructor	Description
AbstractEStatementOptimizer(DataChainsUpdatePolicy dataChainsUpdatePolicy)

Method Summary

Modifier and Type	Method	Description
protected abstract IEStatement	optimizeStatement(IEStatement stm)	Attempt to optimize a statement.
protected int	perform()	Perform the optimization pass.

Methods inherited from class com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEOptimizer

cleanCfg, deleteUnreachableTrampoline, dumpCfg, getDataChainsUpdatePolicy, getMasterOptimizer, getMasterOptimizerSafe, performOnExpression, performOnTarget, postPerform, postPerform, setDataChainsUpdatePolicy, verifyCfg

Methods inherited from class com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.AbstractOptimizer

addTag, getName, getPluginInformation, getPreferredExecutionStage, getPriority, getRequiredModeThreshold, getTags, getType, removeTag, setMasterOptimizer, setName, setPreferredExecutionStage, setPriority, setRequiredModeThreshold, setType

Methods inherited from class com.pnfsoftware.jeb.core.AbstractPlugin

dispose, getData, setData

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.IOptimizer

getPreferredExecutionStage, getPriority, getRequiredModeThreshold, getTags, getType, setMasterOptimizer

Methods inherited from interface com.pnfsoftware.jeb.core.IPlugin

dispose, getData, getPluginInformation, setData

Constructor Details

AbstractEStatementOptimizer

public AbstractEStatementOptimizer(DataChainsUpdatePolicy dataChainsUpdatePolicy)

Parameters:

dataChainsUpdatePolicy - statement optimizers CANNOT use the DataChainsUpdatePolicy.UPDATE_IF_REQUIRED policy

Method Details

perform

protected int perform()

Description copied from class: AbstractEOptimizer

Perform the optimization pass. The caller may request that data chains not be updated, whenever possible. (They may be updated internally by the optimizer, which has the final say as to how and when DFA calculations should be run.)

The above means that data chains after running this method may or may not have been modified, and may or may not be in a consistent state with the optimized CFG.

Specified by:

perform in class AbstractEOptimizer

Returns:

the result of a call to one of postPerform(...) or a negative number indicating an error has occurred and the optimizing process should be aborted

optimizeStatement

protected abstract IEStatement optimizeStatement(IEStatement stm)

Attempt to optimize a statement. Sub-expressions may be examined. The implementor should not attempt to modify parent or cousins expressions.

Parameters:

stm - the statement to be optimized

Returns:

the new, optimized statement, which will count for one optimization (the provided statement may be returned); null if the statement was not optimized