Package jadx.core.dex.visitors

Class ModVisitor

java.lang.Object

jadx.core.dex.visitors.AbstractVisitor

jadx.core.dex.visitors.ModVisitor

All Implemented Interfaces:

IDexTreeVisitor

public class ModVisitor
extends AbstractVisitor

Visitor for modify method instructions (remove, replace, process exception handlers)

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	DOUBLE_TO_BITS
private static final long	FLOAT_TO_BITS
private static final org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
ModVisitor()

Method Summary

Modifier and Type	Method	Description
static void	addFieldUsage(IFieldInfoRef fieldData, MethodNode mth)
private static void	anonymousCallArgMod(InsnArg arg)
private static boolean	checkArrSizes(MethodNode mth, NewArrayNode newArrInsn, FillArrayInsn fillArrInsn)
private static void	fixFieldUsage(MethodNode mth, IndexInsnNode insn)	If field is not visible from use site => cast to origin class
private static void	fixPrimitiveCast(MethodNode mth, BlockNode block, int i, InsnNode insn)
private static @Nullable InsnNode	getFirstUseSkipMove(RegisterArg arg)	Return first usage instruction for arg.
private static void	inlineCMPInsns(MethodNode mth, BlockNode block, int i, InsnNode insn, InsnRemover remover)	Inline CMP instructions into 'if' to help conditions merging
private static @Nullable InsnNode	isCastDuplicate(IndexInsnNode castInsn)
private static boolean	isFieldVisibleInMethod(FieldNode field, MethodNode mth)
private static boolean	isResultArgNotUsed(InsnNode insn)
private static void	iterativeRemoveStep(MethodNode mth)
static TernaryInsn	makeBooleanConvertInsn(RegisterArg result, InsnArg castArg, ArgType type)
private static InsnNode	makeFilledArrayInsn(MethodNode mth, NewArrayNode newArrayNode, FillArrayInsn insn)
private static void	processAnonymousConstructor(MethodNode mth, ConstructorInsn co)	For args in anonymous constructor invoke apply: - forbid inline into constructor call - make variables final (compiler require this implicitly)
private static void	processArith(MethodNode mth, ClassNode parentClass, ArithNode arithNode)
private static void	processMoveException(MethodNode mth, BlockNode block, InsnNode insn, InsnRemover remover)
private static void	removeCheckCast(MethodNode mth, BlockNode block, int i, IndexInsnNode insn)
private static void	removeStep(MethodNode mth, InsnRemover remover)	Remove unnecessary instructions
private static void	replaceConst(MethodNode mth, ClassNode parentClass, BlockNode block, int i, InsnNode insn)
private void	replaceConstInAnnotations(ClassNode cls)
private static void	replaceConstKeys(MethodNode mth, ClassNode parentClass, SwitchInsn insn)
private void	replaceConstsInAnnotationForAttrNode(ClassNode parentCls, AttrNode attrNode)
private void	replaceConstsInAnnotationForMethodParamsAttr(ClassNode cls, MethodNode m)
private void	replaceConstsInAnnotationsAttr(ClassNode parentCls, AnnotationsAttr annotationsList)
private EncodedValue	replaceConstValue(ClassNode parentCls, EncodedValue encodedValue)
private static void	replaceStep(MethodNode mth, InsnRemover remover)
boolean	visit(ClassNode cls)	Visit class
void	visit(MethodNode mth)	Visit method

Methods inherited from class jadx.core.dex.visitors.AbstractVisitor

getName, init, toString

Methods inherited from class java.lang.Object

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

Field Details

LOG

private static final org.slf4j.Logger LOG

DOUBLE_TO_BITS

private static final long DOUBLE_TO_BITS

FLOAT_TO_BITS

private static final long FLOAT_TO_BITS

Constructor Details

ModVisitor

public ModVisitor()

Method Details

visit

public boolean visit(ClassNode cls)
              throws JadxException

Description copied from interface: IDexTreeVisitor

Visit class

Specified by:

visit in interface IDexTreeVisitor

Overrides:

visit in class AbstractVisitor

Returns:

false for disable child methods and inner classes traversal

Throws:

JadxException

visit

public void visit(MethodNode mth)

Description copied from interface: IDexTreeVisitor

Visit method

Specified by:

visit in interface IDexTreeVisitor

Overrides:

visit in class AbstractVisitor

replaceStep

private static void replaceStep(MethodNode mth,
 InsnRemover remover)

fixFieldUsage

private static void fixFieldUsage(MethodNode mth,
 IndexInsnNode insn)

If field is not visible from use site => cast to origin class

isFieldVisibleInMethod

private static boolean isFieldVisibleInMethod(FieldNode field,
 MethodNode mth)

replaceConstKeys

private static void replaceConstKeys(MethodNode mth,
 ClassNode parentClass,
 SwitchInsn insn)

fixPrimitiveCast

private static void fixPrimitiveCast(MethodNode mth,
 BlockNode block,
 int i,
 InsnNode insn)

makeBooleanConvertInsn

public static TernaryInsn makeBooleanConvertInsn(RegisterArg result,
 InsnArg castArg,
 ArgType type)

replaceConstInAnnotations

private void replaceConstInAnnotations(ClassNode cls)

replaceConstsInAnnotationForMethodParamsAttr

private void replaceConstsInAnnotationForMethodParamsAttr(ClassNode cls,
 MethodNode m)

replaceConstsInAnnotationForAttrNode

private void replaceConstsInAnnotationForAttrNode(ClassNode parentCls,
 AttrNode attrNode)

replaceConstsInAnnotationsAttr

private void replaceConstsInAnnotationsAttr(ClassNode parentCls,
 AnnotationsAttr annotationsList)

replaceConstValue

private EncodedValue replaceConstValue(ClassNode parentCls,
 EncodedValue encodedValue)

replaceConst

private static void replaceConst(MethodNode mth,
 ClassNode parentClass,
 BlockNode block,
 int i,
 InsnNode insn)

processArith

private static void processArith(MethodNode mth,
 ClassNode parentClass,
 ArithNode arithNode)

inlineCMPInsns

private static void inlineCMPInsns(MethodNode mth,
 BlockNode block,
 int i,
 InsnNode insn,
 InsnRemover remover)

Inline CMP instructions into 'if' to help conditions merging

checkArrSizes

private static boolean checkArrSizes(MethodNode mth,
 NewArrayNode newArrInsn,
 FillArrayInsn fillArrInsn)

removeCheckCast

private static void removeCheckCast(MethodNode mth,
 BlockNode block,
 int i,
 IndexInsnNode insn)

isCastDuplicate

@Nullable
private static @Nullable InsnNode isCastDuplicate(IndexInsnNode castInsn)

removeStep

private static void removeStep(MethodNode mth,
 InsnRemover remover)

Remove unnecessary instructions

iterativeRemoveStep

private static void iterativeRemoveStep(MethodNode mth)

isResultArgNotUsed

private static boolean isResultArgNotUsed(InsnNode insn)

processAnonymousConstructor

private static void processAnonymousConstructor(MethodNode mth,
 ConstructorInsn co)

For args in anonymous constructor invoke apply: - forbid inline into constructor call - make variables final (compiler require this implicitly)

anonymousCallArgMod

private static void anonymousCallArgMod(InsnArg arg)

getFirstUseSkipMove

@Nullable
private static @Nullable InsnNode getFirstUseSkipMove(RegisterArg arg)

Return first usage instruction for arg. If used only once try to follow move chain

makeFilledArrayInsn

private static InsnNode makeFilledArrayInsn(MethodNode mth,
 NewArrayNode newArrayNode,
 FillArrayInsn insn)

processMoveException

private static void processMoveException(MethodNode mth,
 BlockNode block,
 InsnNode insn,
 InsnRemover remover)

addFieldUsage

public static void addFieldUsage(IFieldInfoRef fieldData,
 MethodNode mth)