org.hotswap.agent.javassist.bytecode.analysis

Class ControlFlow.Block

java.lang.Object

org.hotswap.agent.javassist.bytecode.stackmap.BasicBlock

org.hotswap.agent.javassist.bytecode.analysis.ControlFlow.Block

Enclosing class:

ControlFlow

public static class ControlFlow.Block
extends BasicBlock

Basic block. It is a sequence of contiguous instructions that do not contain jump/branch instructions except the last one. Since Java6 or later does not allow JSR, we deal with JSR as a non-branch instruction.

Nested Class Summary

Nested classes/interfaces inherited from class org.hotswap.agent.javassist.bytecode.stackmap.BasicBlock

BasicBlock.Catch, BasicBlock.Maker

Field Summary

Fields

Modifier and Type	Field and Description
Object	clientData A field that can be freely used for storing extra data.

Fields inherited from class org.hotswap.agent.javassist.bytecode.stackmap.BasicBlock

exit, incoming, length, position, stop, toCatch

Method Summary

Modifier and Type	Method and Description
ControlFlow.Catcher[]	catchers() Returns catch clauses that will catch an exception thrown in this block.
ControlFlow.Block	exit(int n) Returns the n-th block that may be executed after this block.
int	exits() Return the number of the blocks that may be executed after this block.
ControlFlow.Block	incoming(int n) Returns the block that the control may jump into this block from.
int	incomings() Returns the number of the control paths entering this block.
int	index() Returns the position of this block in the array of basic blocks that the basicBlocks method returns.
int	length() Returns the length of this block.
int	position() Returns the position of the first instruction in this block.
protected void	toString2(StringBuffer sbuf)

Methods inherited from class org.hotswap.agent.javassist.bytecode.stackmap.BasicBlock

find, toString

Methods inherited from class java.lang.Object

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

Field Detail

clientData

public Object clientData

A field that can be freely used for storing extra data. A client program of this control-flow analyzer can append an additional attribute to a Block object. The Javassist library never accesses this field.

Method Detail

toString2

protected void toString2(StringBuffer sbuf)

Overrides:

toString2 in class BasicBlock

index

public int index()

Returns the position of this block in the array of basic blocks that the basicBlocks method returns.

See Also:

ControlFlow.basicBlocks()

position

public int position()

Returns the position of the first instruction in this block.

length

public int length()

Returns the length of this block.

incomings

public int incomings()

Returns the number of the control paths entering this block.

incoming

public ControlFlow.Block incoming(int n)

Returns the block that the control may jump into this block from.

exits

public int exits()

Return the number of the blocks that may be executed after this block.

exit

public ControlFlow.Block exit(int n)

Returns the n-th block that may be executed after this block.

Parameters:

n - an index in the array of exit blocks.

catchers

public ControlFlow.Catcher[] catchers()

Returns catch clauses that will catch an exception thrown in this block.