Package daikon.dcomp

Class Instrument

Object

Instrument

All Implemented Interfaces:

ClassFileTransformer

public class Instrument
extends Object
implements ClassFileTransformer

Constructor Summary

Constructors

Constructor	Description
Instrument()	Instrument class constructor.

Method Summary

Modifier and Type	Method	Description
protected static boolean	is_transformer(String classname)	Returns whether or not the specified class is part of a tool known to do Java byte code transformation.
static void	print_call_stack()	Debug code for printing the current run-time call stack.
byte @Nullable []	transform(ClassLoader loader, @InternalForm String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)

Methods inherited from class Object

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

Methods inherited from interface ClassFileTransformer

transform

Constructor Detail

Instrument

public Instrument()

Instrument class constructor. Setup debug directories, if needed.

Method Detail

print_call_stack

public static void print_call_stack()

Debug code for printing the current run-time call stack.

transform

public byte @Nullable [] transform(ClassLoader loader,
                                   @InternalForm String className,
                                   Class<?> classBeingRedefined,
                                   ProtectionDomain protectionDomain,
                                   byte[] classfileBuffer)
                            throws IllegalClassFormatException

Specified by:

transform in interface ClassFileTransformer

Throws:

IllegalClassFormatException

is_transformer

@Pure
protected static boolean is_transformer(String classname)

Returns whether or not the specified class is part of a tool known to do Java byte code transformation. We need to warn the user that this may not work correctly.

Parameters:

classname - class to be checked

Returns:

true if classname is a known transformer