Package jadx.core.dex.visitors.blocks

Class BlockSplitter

java.lang.Object

jadx.core.dex.visitors.AbstractVisitor

jadx.core.dex.visitors.blocks.BlockSplitter

All Implemented Interfaces:

IDexTreeVisitor

public class BlockSplitter
extends AbstractVisitor

Field Summary

Fields

Modifier and Type	Field	Description
private static final Set<InsnType>	SEPARATE_INSNS	Leave these instructions alone in the block node
private static final Set<InsnType>	SPLIT_WITHOUT_CONNECT	Split without connecting to the next block

Constructor Summary

Constructors

Constructor	Description
BlockSplitter()

Method Summary

Modifier and Type	Method	Description
private static void	addTempConnectionsForExcHandlers(MethodNode mth, Map<Integer,BlockNode> blocksMap)	Connect exception handlers to the throw block.
(package private) static BlockNode	blockSplitTop(MethodNode mth, BlockNode block)
private static boolean	canRemoveBlock(BlockNode block)
(package private) static void	collectSuccessors(BlockNode startBlock, BlockNode methodEnterBlock, Set<BlockNode> toRemove)
static void	connect(BlockNode from, BlockNode to)
(package private) static BlockNode	connectNewBlock(MethodNode mth, BlockNode block, int offset)
(package private) static void	copyBlockData(BlockNode from, BlockNode to)
(package private) static List<BlockNode>	copyBlocksTree(MethodNode mth, List<BlockNode> blocks)
(package private) static void	detachBlock(BlockNode block)
static void	detachMarkedBlocks(MethodNode mth)
private static void	expandMoveMulti(MethodNode mth)
private static BlockNode	getBlock(int offset, Map<Integer,BlockNode> blocksMap)
private static BlockNode	getNewBlock(BlockNode block, Map<BlockNode,BlockNode> map)
private static void	initBlocksInTargetNodes(MethodNode mth)	Init 'then' and 'else' blocks for 'if' instruction.
static BlockNode	insertBlockBetween(MethodNode mth, BlockNode source, BlockNode target)
private static boolean	isDoWhile(Map<Integer,BlockNode> blocksMap, BlockNode curBlock, InsnNode insn)
static boolean	isSeparate(InsnType insnType)
private static boolean	isSplitByJump(InsnNode prevInsn, InsnNode currentInsn)
static void	removeConnection(BlockNode from, BlockNode to)
(package private) static boolean	removeEmptyBlock(BlockNode block)
(package private) static boolean	removeEmptyDetachedBlocks(MethodNode mth)
private static void	removeInsns(MethodNode mth)
private static void	removeJumpAttr(MethodNode mth)
static void	removePredecessors(BlockNode block)
static void	replaceConnection(BlockNode source, BlockNode oldDest, BlockNode newDest)
(package private) static void	replaceTarget(BlockNode source, BlockNode oldTarget, BlockNode newTarget)
private static void	setupConnectionsFromJumps(MethodNode mth, Map<Integer,BlockNode> blocksMap)
private static void	setupExitConnections(MethodNode mth)
private static Map<Integer,BlockNode>	splitBasicBlocks(MethodNode mth)
(package private) static BlockNode	startNewBlock(MethodNode mth, int offset)
void	visit(MethodNode mth)	Visit method

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

getName, init, toString, visit

Methods inherited from class java.lang.Object

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

Field Details

SEPARATE_INSNS

private static final Set<InsnType> SEPARATE_INSNS

Leave these instructions alone in the block node

SPLIT_WITHOUT_CONNECT

private static final Set<InsnType> SPLIT_WITHOUT_CONNECT

Split without connecting to the next block

Constructor Details

BlockSplitter

public BlockSplitter()

Method Details

isSeparate

public static boolean isSeparate(InsnType insnType)

visit

public void visit(MethodNode mth)

Description copied from interface: IDexTreeVisitor

Visit method

Specified by:

visit in interface IDexTreeVisitor

Overrides:

visit in class AbstractVisitor

splitBasicBlocks

private static Map<Integer,BlockNode> splitBasicBlocks(MethodNode mth)

initBlocksInTargetNodes

private static void initBlocksInTargetNodes(MethodNode mth)

Init 'then' and 'else' blocks for 'if' instruction.

connectNewBlock

static BlockNode connectNewBlock(MethodNode mth,
 BlockNode block,
 int offset)

startNewBlock

static BlockNode startNewBlock(MethodNode mth,
 int offset)

connect

public static void connect(BlockNode from,
 BlockNode to)

removeConnection

public static void removeConnection(BlockNode from,
 BlockNode to)

removePredecessors

public static void removePredecessors(BlockNode block)

replaceConnection

public static void replaceConnection(BlockNode source,
 BlockNode oldDest,
 BlockNode newDest)

insertBlockBetween

public static BlockNode insertBlockBetween(MethodNode mth,
 BlockNode source,
 BlockNode target)

blockSplitTop

static BlockNode blockSplitTop(MethodNode mth,
 BlockNode block)

copyBlockData

static void copyBlockData(BlockNode from,
 BlockNode to)

copyBlocksTree

static List<BlockNode> copyBlocksTree(MethodNode mth,
 List<BlockNode> blocks)

getNewBlock

private static BlockNode getNewBlock(BlockNode block,
 Map<BlockNode,BlockNode> map)

replaceTarget

static void replaceTarget(BlockNode source,
 BlockNode oldTarget,
 BlockNode newTarget)

setupConnectionsFromJumps

private static void setupConnectionsFromJumps(MethodNode mth,
 Map<Integer,BlockNode> blocksMap)

addTempConnectionsForExcHandlers

private static void addTempConnectionsForExcHandlers(MethodNode mth,
 Map<Integer,BlockNode> blocksMap)

Connect exception handlers to the throw block. This temporary connection is necessary to build close to a final dominator tree. Will be used and removed in jadx.core.dex.visitors.blocks.BlockExceptionHandler

setupExitConnections

private static void setupExitConnections(MethodNode mth)

isSplitByJump

private static boolean isSplitByJump(InsnNode prevInsn,
 InsnNode currentInsn)

isDoWhile

private static boolean isDoWhile(Map<Integer,BlockNode> blocksMap,
 BlockNode curBlock,
 InsnNode insn)

getBlock

private static BlockNode getBlock(int offset,
 Map<Integer,BlockNode> blocksMap)

expandMoveMulti

private static void expandMoveMulti(MethodNode mth)

removeJumpAttr

private static void removeJumpAttr(MethodNode mth)

removeInsns

private static void removeInsns(MethodNode mth)

detachMarkedBlocks

public static void detachMarkedBlocks(MethodNode mth)

removeEmptyDetachedBlocks

static boolean removeEmptyDetachedBlocks(MethodNode mth)

removeEmptyBlock

static boolean removeEmptyBlock(BlockNode block)

canRemoveBlock

private static boolean canRemoveBlock(BlockNode block)

collectSuccessors

static void collectSuccessors(BlockNode startBlock,
 BlockNode methodEnterBlock,
 Set<BlockNode> toRemove)

detachBlock

static void detachBlock(BlockNode block)