--%>
Assignment Help - homework help

Use of setjmp and longjmp

Use of setjmp() and longjmp(): In C/C++, setjmp() saves the contents of the registers at a particular state in the program and longjmp() will restore that state later. In this way, longjmp() “returns” to the state of the program when setjmp() was called.

In general these functions are problematic for C++ because they do not support C++ object semantics. In particular, they do not ensure the proper destructor calls and so objects may not be cleaned up properly, leaving the system in a bad state.

Using these functions may also degrade performance by preventing optimization on local variables. For C++ exception handling, try/catch constructs are recommended instead.

214_serjmp.jpg

For model checking in particular, non-hierarchical long jumps are difficult to model with modeling languages like Java. These functions need to do register restoration which requires modeling of registers and their related operations, adding considerable overhead to model-checking effort.

   Related Questions in Programming Languages

  • Q : State machine to identify three

    Explain a finite state machine which will detect three consecutive coins tosses of one coin which results in heads?

    		•
  • Q : Scope resolution operator The scope

    		•
  • Q : Print the factors of each perfect number

    An integer number is said to be a perfect number if its factors, including 1 (but not the number itself), sum to be the number. For example, 6 is a perfect number because 6 = 1+ 2+ 3. Write a function perfect that determines if parameter number is a perfect number. Us

    		•
  • Q : What is an Infinite recursion Infinite

    Infinite recursion: Recursion which does not finish. This can effect from any of direct recursion, indirect recursion or the mutual recursion. It is generally the outcome of a logical error, and can consequence in stack overflow.

    		•
  • Q : What is Hostname What is Hostname : It

    What is Hostname: It is the name of a host system.

    		•
  • Q : Requirement of Timer control in AJAX

    Explain the requirement of a Timer control in the AJAX.

    		•
  • Q : Uses of the Utilities.Trim function

    Some tools on the web page I am testing have leading or trailing whitespaces. I am utilizes the Utilities.Trim function to eliminate them, but sometimes this does not work. What is incorrect?

    		•
  • Q : What is Left shift operator Left shift

    Left shift operator: Left shift operator (<<) is the bit manipulation operator. This moves the bits in its left operand zero or additional positions to the left, according to the value of its right operand. The zero bits are added up to the righ

    		•
  • Q : Explain LURCH LURCH (Menzies et al.

    LURCH (Menzies et al. 2004) uses random search to explore a state machine’s state space. Because the search is random, it gives no guarantee that the state space has been exhaustively explored, so LURCH cannot be used for verification. However,

    		•
  • Q : Type promotion rule Q. Explain type

    Q. Explain type conversion rules for basic data types in java. Ans. Type promotion rule: Java automatically each bits or short operant to int when evaluating an expression. As usual as the automatic promotion

    		•