bytecode

In my ongoing effort to quench my undying thirst for more programming knowledge I have come up with the idea of attempting to write a (at least for now) simple programming language that compiles into bytecode. The problem is I don't know the first thing about language design. Does anyone have any advice on a methodology to build a parser and what the basic features every language should have? What reading would you recommend for language design? How high level should I be shooting for? Is it unrealistic to hope to be able to include a feature to allow one to inline bytecode in a way similar to

I am trying to write a bug detector to find instances of the method call "System.out.println" using Findbugs. I understand that "System.out.println" in bytecode is compiled to a call to GETSTATIC, which pushes "System.out" onto the stack . A call to INVOKEVIRTUAL pops "System.out" off the stack and calls the method. I have prepared some code (found below) which finds the correct GETSTATIC and INVOKEVIRTUAL calls, but have been unable to link the two together. I suspect I may need to use OpcodeStack in some way, but am having trouble in understanding how I can use it. Any help would be

The problem is to create a dynamic enhanced version of existing objects. I cannot modify the object's Class . Instead I have to: subclass it wrap the existing object in the new Class delegate all the original method calls to the wrapped object implement all methods that are defined by another interface The interface to add to existing objects is: public interface EnhancedNode { Node getNode(); void setNode(Node node); Set getRules(); void setRules(Set rules); Map getGroups(); void setGroups(Map groups); } With Byte Buddy I managed to subclass and to implement my interface. The problem is the

I am a complete newb to python, hence a silly question. As i understand, upon first execution of a *.py program, byte code is created into *.pyc and used until a change in *.py file. Where might this *.pyc bytecode be found in a project? I would think bin, but nothing is there A *.pyc file is created for imported modules, and they are placed in the same directory containing the .py file. However... no .pyc file is created for the main script for your program. In other words... if you call "python myscript.py" on the command line, there will be no .pyc file for myscript.py. This is how Python 2

I recently read on Jon Masamitsu's Weblog that huge methods (8000 bytes of bytecode) are not JIT compiled with HotSpot. So my question is: how do I find out (as a programmer) how many bytes of bytecode a particular method has? The JIT compiler of course seems to know. Can I extract this piece of information from the .class file? You can use javap -c mypackage.MyClass to dump the bytecode of your class (and see the size of each method) Generally speaking, you should know that a method is too large to read and understand before you hit this limit. IMHO its more a problem for generated code. BTW