--%>
Assignment Help - homework help

Environment Modeling in Java Pathfinder

Environment Modeling: In JPF, Java class files can be processed in two different ways:

A) As ordinary Java classes managed and executed by the host JVM (e.g., standard Java library classes, JPF implementation classes)

B) As “modeled” classes managed and processed (verified) by JPF

We have to clearly distinguish between these two modes. In particular, JPF’s “Model” layer has its own class and object model, which is completely different than and incompatible with the hidden class and object models of the underlying host JVM executing JPF.

Each standard JVM supports a Java Native Interface (JNI), that is used to delegate execution from the JVM-controlled bytecode down into the platform-dependent native layer (machine code). This is normally used to interface certain functionalities such as I/O or graphics to the platform OS and architecture. JPF provides an analogous mechanism to lower the “execution” level in JPF from JPF-controlled bytecode into JVM-controlled bytecode. This mechanism is called Model Java Interface (MJI). It supports the creation of dedicated classes to be executed by the underlying JVM rather than JPF. Such classes are not model checked by JPF.

   Related Questions in Programming Languages

  • Q : Explain Polling Polling : It is the

    Polling: It is the process of repeatedly testing until a situation becomes true. Polling can be incompetent when the time between tests is little compared with the time it will take for the condition to become true or right. A polling thread must slee

    		•
  • Q : Define Well-known port Well-known port

    Well-known port: It is a port number at which a server provides a familiar service. For example, 80 is well-known port number for the servers employing the HyperText Transfer Protocol (abbreviated as HTTP).

    		•
  • Q : Explain the difference between a

    Explain the difference between a computer process and thread.

    		•
  • Q : Define the term Toggle Define the term

    Define the term Toggle: To alternate among two values, like true and false, on and off, or 1 & 0.

    		•
  • Q : What is an Interrupt Interrupt : This

    Interrupt: This is an asynchronous message sent to a process or thread which interrupts what it is at present doing. This generally outcomes in an InterruptedException object being received by an interrupted thread. Waiting for an int

    		•
  • Q : What is Variable Variable : It is the

    Variable: It is the memory block of specific size where value can be stored and modified throughout program execution. Example: int x, float y, float amount, char c;

    		•
  • Q : Inventory management system in UML

    Mini-Case The Hatcher Company is in the process of developing a new inventory management system.  One of the event handling processes in that system is Receive Supplier Shipments.  The (inexperie

    		•
  • Q : What is Reader class Reader class : It

    Reader class: It is sub-class of the Reader abstract, stated in the java.io package. Reader classes translate input from the host-dependent character set encoding into the Unicode.

    		•
  • Q : Explain the way to write the opening

    Explain the way to write the opening tag of an XHTML element.

    		•
  • Q : Program to controls a quiz show in C++

    Foundations of Computer Science In this project, we will write a program that controls a quiz show, much like the many popular TV shows. The program will read in a group of questions and thei

    		•