Hai
I am trying to write a program using bcel api
such the before every method first statement,an object
call abc will be created and it will call a method
runCode().
class Test
{
public static void main()
{
Instrument abc = new Instrument();
abc.runCode();
}
}
I followed the sample HelloWorldBuilder.java program
but I am getting verifier error saying Illegal
constant pool index.I have the Instrument.class which
has runCode method in the same directory as Test
class.
The code is enclosed - the following code executes
for every method.
/////////////////////////////////////////////
InstructionFactory factory = new InstructionFacto(cg);
InstructionList il = new InstructionList();
// create instrumentor object and store it in local
variable abc
il.append(factory.createNew("Instrument"));
il.append(InstructionConstants.DUP);
//call instrumentor
il.append(factory.createInvoke("Instrument","<init>",Type.VOID,Type.NO_ARGS,Constants.INVOKESPECIAL));
//create a local variable
LocalVariableGen lg = mg.addLocalVariable("abc",new
ObjectType("Instrument"),null,null);
int abc = lg.getIndex();
//il.append(InstructionConstants.ACONST_NULL);
lg.setStart(il.append(new ASTORE(abc))); //abc should
be available from here
il.append(new ALOAD(abc));
il.append(factory.createInvoke("Instrument","runCode",Type.VOID,Type.NO_ARGS,Constants.INVOKEVIRTUAL));
InstructionList il1 = mg.getInstructionList();
InstructionHandle[] ihs = il1.getInstructionHandles();
/* Instrument method start */
il1.insert(ihs[0],il);
/////////////////////////////////////////////////
What all i am trying to do is:
Instrument abc = new Instrument();
abc.runCode();
at the beginning of evry method.
The error is :
Exception in thread "main" java.lang.VerifyError:
(class: Test, method: main signature:
([Ljava/lang/String;)V) Illegal
type in constant pool
I am really stuck at this...Please help me out.Your
help is highly appreciated.
Thank you
Ram
=====
C.Kalyan Ram
2221,S St
Apt #23,Lincoln
NE-68503
Email:[EMAIL PROTECTED]
Ph:(402)742-9671
University Of Nebraska-Lincoln
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