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

Class AbstractEBlockOptimizer

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.AbstractEBlockOptimizer

All Implemented Interfaces:

IPlugin, IEOptimizer, IOptimizer<IERoutineContext>

public abstract class AbstractEBlockOptimizer
extends AbstractEOptimizer

Skeleton for an IRE basic block 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
AbstractEBlockOptimizer(DataChainsUpdatePolicy dataChainsUpdatePolicy)

Method Summary

Modifier and Type	Method	Description
protected abstract int	optimizeBlock(BasicBlock<IEStatement> b)	Attempt to optimize a basic block.
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

AbstractEBlockOptimizer

public AbstractEBlockOptimizer(DataChainsUpdatePolicy dataChainsUpdatePolicy)

Parameters:

dataChainsUpdatePolicy - block optimizers should have a policy of DataChainsUpdatePolicy.UPDATE_IF_OPTIMIZED or DataChainsUpdatePolicy.UPDATE_IF_REQUIRED

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

optimizeBlock

protected abstract int optimizeBlock(BasicBlock<IEStatement> b)

Attempt to optimize a basic block. All instruction in the block may be modified.

Parameters:

b - a basic block

Returns:

the number of optimizations performed in the block; a negative value can be returned to indicate a transaction failure (critical error),