Help needed regarding try - catch block

[Eshwari PattapathuSubramanianSundaran <es...@yahoo.com>]

Hi,
 
I'm trying to encapsulate an instruction in a try block and in the catch block, I'm trying to add a series of instructions as instruction list.  Here is the code for the same
 
    try_start = linenogen[lineindex].getInstruction();
    GOTO g = new GOTO(null);
     InstructionHandle try_end = il.append(g);
     
     InstructionList catchlist = new InstructionList();
     InstructionFactory factory = new InstructionFactory(mpool);
 
     catchlist.append(factory.createFieldAccess("java.lang.System", "out", p_stream,
                            Constants.GETSTATIC));
     catchlist.append(new PUSH(mpool, "Exception caught"));
     catchlist.append(factory.createInvoke("java.io.PrintStream", "println", Type.VOID, 
                     new Type[] { Type.STRING }, Constants.INVOKEVIRTUAL));
     
     InstructionHandle catch_inst = il.append(catchlist);
     methodGen.addExceptionHandler(try_start, try_end, catch_inst, exception);
     g.setTarget(ihnext);
     methodGen.setMaxStack();
     classgen.removeMethod(methods[mindex]);
     classgen.addMethod(methodGen.getMethod());
     il.dispose();
 
When I try to run the modified class, I get the following exception.
 

java.lang.VerifyError: (class: bcelPackage/CorrectiveClass, method: printString signature: ()V) Falling off the end of the code

at InsertTryCatch.main(InsertTryCatch.java:43)

Exception in thread "main" 

If the catchlist has only the return instruction, InstructionConstants.RETURN, then the class compiles and runs perfectly without any errors.

Please help me where I'm going wrong. 
 
Thanks,
Eshwari


		
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