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Java Source Code / Java Documentation » Byte Code » PROSE » ch.ethz.inf.iks.jvmai.jvmdi

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Java Document (Java Doc)

ch.ethz.inf.iks.jvmai.jvmdi .JumpFinallyVisitor

JumpFinallyVisitor
public class JumpFinallyVisitor extends EmptyVisitor (Code)
	A visitor that adds a JSR instruction before each `return' instruction. The jump branches to a predefined finally handle. This functionality is needed to implement method exit join points. author: Angela Nicoara author: Gerald Linhopher version: $Revision$

Field Summary
protected InstructionList	code Method bytecode represented as a BCEL instruction list.
protected InstructionHandle	finallyStart Branch target of JSR instruction.
protected InstructionHandle	handle Temporary instruction handle.
protected int	localIndex Index of local variable where an eventual result of a return can be stored.
protected int	localSize Size of local variable.
protected InstructionHandle	tryEnd Last instruction that will be visited.
protected InstructionHandle	tryStart First instruction that will be visited.

Constructor Summary
public	JumpFinallyVisitor(InstructionList code, InstructionHandle tryStart, InstructionHandle tryEnd, InstructionHandle finallyStart, int localIndex) Create a new instance of a JumpFinallyVisitor.

Method Summary
public int	getLocalSize() Get the size of the local variable that is used to temporarily store the result.
public void	go() Traverse list of instructions and visit each.
protected void	retarget(InstructionHandle newTarget) Retarget all branch instructions to `newTarget'.
public void	visitARETURN(ARETURN obj)
public void	visitDRETURN(DRETURN obj)
public void	visitFRETURN(FRETURN obj)
public void	visitIRETURN(IRETURN obj)
public void	visitLRETURN(LRETURN obj)
public void	visitRETURN(RETURN obj)

Field Detail

code
protected InstructionList code(Code)
	Method bytecode represented as a BCEL instruction list.

finallyStart
protected InstructionHandle finallyStart(Code)
	Branch target of JSR instruction.

handle
protected InstructionHandle handle(Code)
	Temporary instruction handle.

localIndex
protected int localIndex(Code)
	Index of local variable where an eventual result of a return can be stored.

localSize
protected int localSize(Code)
	Size of local variable.

tryEnd
protected InstructionHandle tryEnd(Code)
	Last instruction that will be visited.

tryStart
protected InstructionHandle tryStart(Code)
	First instruction that will be visited.

Constructor Detail

JumpFinallyVisitor
public JumpFinallyVisitor(InstructionList code, InstructionHandle tryStart, InstructionHandle tryEnd, InstructionHandle finallyStart, int localIndex)(Code)
	Create a new instance of a JumpFinallyVisitor. Parameters: code - method bytecode represented as a BCEL instruction list Parameters: tryStart - first instruction that will be visited Parameters: tryEnd - last instruction that will be visited Parameters: finallyStart - branch target of JSR instruction Parameters: localIndex - index of local variable to store return result

Method Detail

getLocalSize
public int getLocalSize()(Code)
	Get the size of the local variable that is used to temporarily store the result. size of local variable

go
public void go()(Code)
	Traverse list of instructions and visit each.

retarget
protected void retarget(InstructionHandle newTarget)(Code)
	Retarget all branch instructions to `newTarget'. Parameters: newTarget - new target

visitARETURN
public void visitARETURN(ARETURN obj)(Code)

visitDRETURN
public void visitDRETURN(DRETURN obj)(Code)

visitFRETURN
public void visitFRETURN(FRETURN obj)(Code)

visitIRETURN
public void visitIRETURN(IRETURN obj)(Code)

visitLRETURN
public void visitLRETURN(LRETURN obj)(Code)

visitRETURN
public void visitRETURN(RETURN obj)(Code)

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