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

Class AbstractCBlockOptimizer

java.lang.Object

com.pnfsoftware.jeb.core.AbstractPlugin

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

com.pnfsoftware.jeb.core.units.code.asm.decompiler.ast.opt.AbstractCOptimizer

com.pnfsoftware.jeb.core.units.code.asm.decompiler.ast.opt.AbstractCBlockOptimizer

All Implemented Interfaces:

IPlugin, ICOptimizer, IOptimizer<ICMethod>

Direct Known Subclasses:

AbstractCElementOptimizer, AbstractCStatementOptimizer

public abstract class AbstractCBlockOptimizer
extends AbstractCOptimizer

Perform a recursive optimizer on ICBlock. The policy is recurse first, so optimizer is done as post-treatment.

Field Summary

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

cf, ef, g, m, of

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
AbstractCBlockOptimizer()	Create a block optimizer.

Method Summary

Modifier and Type	Method	Description
protected ICStatement	getNextSiblingStatement(int statementIndex, ICBlock block, ICStatement blockNextSiblingStm)	Retrieve the statement following a child block in its parent block.
protected abstract int	optimizeBlock(ICBlock b)	Attempt to optimize CBlock.
protected int	optimizeBlock(ICBlock b, ICCompound parent, ICStatement blockNextStm)	Attempt to optimize CBlock, with some contextual information provided.
protected int	perform()	Can be overridden.
final int	performOnMethoBlocksRecursivively()	Recursively process the method body blocks.

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

getMasterOptimizer, getMasterOptimizerSafe, performOnTarget

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

AbstractCBlockOptimizer

public AbstractCBlockOptimizer()

Create a block optimizer.

Method Details

perform

protected int perform()

Can be overridden. The default implementation simply calls performOnMethoBlocksRecursivively().

Specified by:

perform in class AbstractCOptimizer

Returns:

the number of optimizations performed

performOnMethoBlocksRecursivively

public final int performOnMethoBlocksRecursivively()

Recursively process the method body blocks.

Returns:

the number of optimizations performed

getNextSiblingStatement

protected ICStatement getNextSiblingStatement(int statementIndex,
 ICBlock block,
 ICStatement blockNextSiblingStm)

Retrieve the statement following a child block in its parent block.

Parameters:

statementIndex - index of the current statement in block

block - block containing the current statement

blockNextSiblingStm - next sibling statement of block, if any

Returns:

the next sibling statement, or null if none exists

optimizeBlock

protected abstract int optimizeBlock(ICBlock b)

Attempt to optimize CBlock. Sub-expressions may be examined. The implementor should not attempt to modify parent or siblings CBlocks.

Parameters:

b - CBlock

Returns:

the number of optimizations done

optimizeBlock

protected int optimizeBlock(ICBlock b,
 ICCompound parent,
 ICStatement blockNextStm)

Attempt to optimize CBlock, with some contextual information provided. Sub-expressions may be examined. The implementor should not attempt to modify parent or siblings CBlocks.

Parameters:

b - CBlock

parent - the parent compound statement

blockNextStm - the next statement (i.e. the next sibling statement in the AST, not control-flow related)

Returns:

the number of optimizations done