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Search found 261 results on 11 pages for 'bytecode'.

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• Book (or resource) on Java bytecode

  - by Andrea

  I am looking for some resources on the JVM bytecode. Ideally I would for a short book; something more than a blog post but not a 800 pages tome. If it is relevant, I am a Scala developer, not a Java one, although I know Java just fine. I would like something that allowed me to read JVM bytecode and answer questions such as: Why does the bytecode…

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• Bytecode manipulation patterns

  - by ahe

  What legitimate uses are there for bytecode manipulation and how to people implement those bytecode manipulation based solutions in practice?

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• Stand-alone Bytecode Verifier

  - by HH

  In my bytecode instrumentation project, I stumble frequently on VerifyErrors. However, the default java Verifier gives little information on which instruction resulted in the error (it only gives the method and a small message). Is there any stand-alone bytecode verifier which provides with a little more advanced help in locating the error, at…

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• java bytecode editor?

  - by AlfaTeK

  What's a good free bytecode editor? I want an editor, something with a GUI... I tried jbe-0.1b with no luck (can't save the bytecode changes).

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• How are Scala traits compiled into Java bytecode?

  - by Justin Ardini

  I have played around with Scala for a while now, and I know that traits can act as the Scala equivalent of both interfaces and abstract classes. Recently I've been wondering how exactly traits are compiled into Java bytecode. I found some short explanations that stated traits are compiled exactly like Java interfaces when possible, and…

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• Bytecode and Objects

  - by HH

  Hey everyone, I am working on a bytecode instrumentation project. Currently when handling objects, the verifier throws an error most of the time. So I would like to get things clear concerning rules with objects (I read the JVMS but couldn't find the answer I was looking for): I am instrumenting the NEW instruction: original bytecode …

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• Java Bytecode Manipulation Library Suggestions

  - by Daniel

  I'm looking for a well-maintained Java bytecode manipulation library with an intuitive API. There seem to be quite a lot of them out there. Any suggestions on which ones to try?

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• running jython bytecode using java

  - by noamtm

  It looks like I'm missing something. When using Jython to run my Python code in Java, Java bytecode files are generated (test.py - test@py.class). Can I run these classes directly using java? In other words, I want to make this: $ java test@py [additional cp args] work. The intent: writing Python code and not having to give away…

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• Types in Bytecode

  - by HH

  Hey everyone, I've been working for some time on (Java) Bytecode, however, it had never occurred to me to ask why are some instructions typed? I understand that in an ADD operation, we need to distinguish between an integer addition and a FP addition (that's why we have IADD and FADD). However, why do we need to distinguish between…

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• How do I disassemble ABC bytecode?

  - by izb

  If I have an abc file, either compiled through the flex SDK, or stripped from a .SWF file, are there any tools that will disassemble that file purely to see what it contains?

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• Converting ANTLR AST to Java bytecode using ASM

  - by Nick

  I am currently trying to write my own compiler, targeting the JVM. I have completed the parsing step using Java classes generated by ANTLR, and have an AST of the source code to work from (An ANTLR "CommonTree", specifically). I am using ASM to simplify the generating of the bytecode. Could anyone give a broad overview of how to…

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• Is there a way in .NET to access the bytecode/IL/CLR that is currently running?

  - by Alix

  Hi. I'd like to have access to the bytecode that is currently running or about to run in order to detect certain instructions and take specific actions (depending the instructions). In short, I'd like to monitor the bytecode in order to add safety control. Is this possible? I know there are some AOP frameworks that notify you of…

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• NHibernate.Bytecode.UnableToLoadProxyFactoryFactoryException

  - by Shane

  I have the following code set up in my Startup IDictionary properties = new Dictionary(); properties.Add("connection.driver_class", "NHibernate.Driver.SqlClientDriver"); properties.Add("dialect", "NHibernate.Dialect.MsSql2005Dialect"); properties.Add("proxyfactory.factory_class",…

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• Java: Is there a way to obtain the bytecode for a class at runtime?

  - by Adam Paynter

  In Java, is there a way (at runtime) to obtain the bytecode which defined a particular class? Put another way, is there a way to obtain the byte[] array passed to ClassLoader.defineClass(String name, byte[] b, int off, int len) when a particular class was loaded? I see that this method is declared final,…

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• Dealing with Try/Catch Exceptions in Java bytecode? ("stack height inconsistent")

  - by Cogwirrel

  I am trying to do some error handling in java bytecode. I first tried to implement some catch-like subroutines, where I would check for the error condition, and jump to the appropriate subroutine, a little like: iconst_1 iconst_0 dup ifeq calldiverr goto enddivtest calldiverr: jsr divError…

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• Is it possible to cache JSP bytecode to avoid recompiles w/ Tomcat?

  - by Computer Guru

  Hi, Is there any way of caching the bytecode for JSP webapps/ In particular, using Tomcat as the Java servlet? I'm getting really fed up of Tomcat taking up all the CPU for 10 minutes while it compiles 4 different webapps every time I restart it.... I'm already using Jikes to "speed up" the compiles,…

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• Using JRuby/Jython for Ruby/Python interoperability?

  - by dbr

  Quite-probably a silly question, as I don't know much about Java/Jython/JRuby/bytecode, but.. I stumbled across _why's unholy again today.. It allows you to output Python bytecode from Ruby code.. Basically allowing them to produce the same bytecode.. Jython outputs Java bytecode, as does JRuby..…

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• Any C/C++ to non-native bytecode compiler/interpreters?

  - by Matt

  As the title indicates, are there any C/C++ bytecode compilers/interpreters? I'm writing an application in an interpreted language that depends on certain libraries that are fully cross-compilable (there are no special flags to indicate code changes during compilation for a certain platform) but…

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• Writing a Compiler for .net - IL or Bytecode?

  - by Michael Stum

  I'm currently diving into the inner workings of .net, which means IL. As an exercise, I want to build a brainf..k compiler for .net (yes, they already exist, but as said it's for learning purposes). For the moment I'm just writing some text files that contain .il and compile them with ilasm,…

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• Alternatives to Java bytecode instrumentation

  - by Rafael Regis

  I'm starting a project that will have to instrument java applications for coverage purposes (definition-usage of variables, etc). It has to add trace statements and some logic to the application and maybe remove statements. I have searched for ways of instrument Java code and what I always…

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• Why do VMs need to be "stack machines" or "register machines" etc.?

  - by Prog

  (This is an extremely newbie-ish question). I've been studying a little about Virtual Machines. Turns out a lot of them are designed very similarly to physical or theoretical computers. I read that the JVM for example, is a 'stack machine'. What that means (and correct me if I'm wrong)…

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• Is the hotspot JVM Bytecode Interpreter a tracing JIT?

  - by jtzero

  The question pretty much says it all, I've been looking around for an answer even through the VM spec but I it doesn't explicitly state it.

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• Eclipse + Django: How to get bytecode output when python source files change?

  - by Sean Ochoa

  Whenever I change my python source files in my Django project, the .pyc files become out of date. Of course that's because I need to recompile them in order to test them through my local Apache web server. I would like to get around this manual process by employing some automatic means…

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• Is the hotpost JVM Bytecode Interpreter a tracing JIT?

  - by jtzero

  The question pretty much says it all, I've been looking around for an answer even through the VM spec but I it doesn't explicitly state it.

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• Java bytecode compiler benchmarks

  - by Dave Jarvis

  Q.1. What free compiler produces the fastest executable Java bytecode? Q.2. What free virtual machine executes Java bytecode the fastest (on 64-bit multi-core CPUs)? Q.3. What other (currently active) compiler projects are missing from this list: …

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