public abstract class

AbstractEBlockOptimizer

extends AbstractEOptimizer
java.lang.Object
   ↳ com.pnfsoftware.jeb.core.AbstractPlugin
     ↳ com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.AbstractOptimizer<T>
       ↳ com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEOptimizer
         ↳ com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEBlockOptimizer

Class Overview

Skeleton for an IRE basic block optimizer.

Summary

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Inherited Constants
From interface com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.IOptimizer
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Inherited Fields
From class com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEOptimizer
From class com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.AbstractOptimizer
Public Constructors
AbstractEBlockOptimizer(DataChainsUpdatePolicy dataChainsUpdatePolicy)
Protected Methods
abstract int optimizeBlock(BasicBlock<IEStatement> b)
Attempt to optimize a basic block.
int perform(boolean updateDFA)
Perform the optimization pass.
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Inherited Methods
From class com.pnfsoftware.jeb.core.units.code.asm.decompiler.ir.opt.AbstractEOptimizer
From class com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.AbstractOptimizer
From class com.pnfsoftware.jeb.core.AbstractPlugin
From class java.lang.Object
From interface com.pnfsoftware.jeb.core.IPlugin
From interface com.pnfsoftware.jeb.core.units.code.asm.decompiler.opt.IOptimizer

Public Constructors

public AbstractEBlockOptimizer (DataChainsUpdatePolicy dataChainsUpdatePolicy)

Parameters
dataChainsUpdatePolicy block optimizers should have a policy of UPDATE_IF_OPTIMIZED or UPDATE_IF_REQUIRED

Protected Methods

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),

protected int perform (boolean updateDFA)

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.

Parameters
updateDFA must be true / this parameter will be deprecated (previously was: if true, update data chains according to the optimizer's policy; if false, the optimizer should not perform final DFA computations if needed)
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