Explain debugging a multi threaded program, Operating System

Assignment Help:

Debugging a multi threaded program

The following list points out few of the more frequent oversights and errors that can cause bugs in multithreaded programs.

1.    Ephemeral a pointer to the caller's stack as an argument to a new thread.

2.    Accessing global memory shared variable state without the protection of a synchronization mechanism.

3.    Creating deadlocks originated by two threads trying to acquire rights to the same pair of global resources in alternate order so that one thread controls the first resource and the other controls the second resource and neither can proceed until the other gives up.

4.     Trying to retain a lock already held (recursive deadlock).

5.   Creating a hidden gap within synchronization protection. This is originated when a code segment protected by a synchronization mechanism contains a call to a function that frees and then reacquires the synchronization mechanism before it returns to the caller. The result is that it emerge to the caller that the global data has been protected when it actually has not.

6.    Mixing UNIX signals with threads -- it is superior to use the sigwait() model for handling asynchronous signals.

7.  Making extremely nested, recursive calls as well as using large automatic arrays can cause problems because multithreaded programs have a more limited stack size than single-threaded programs.

8.   Identifying an inadequate stack size or using non-default stacks. And note that multithreaded programs particularly those containing bugs frequently behave differently in two successive runs, given identical inputs, for the reason that of differences in the thread scheduling order.

9.  Generally multithreading bugs are statistical instead of deterministic. Tracing is typically a more effective method of finding order of execution problems than is breakpoint-based debugging.

 


Related Discussions:- Explain debugging a multi threaded program

Modern os, importance of Operating system in modern computers. Also explain...

importance of Operating system in modern computers. Also explain various functions & types of operating systems

Explain parsing, What is parsing Parsing is the procedure of analyzing ...

What is parsing Parsing is the procedure of analyzing a text, made of a sequence of tokens, to define its grammatical structure regarding to a given formal grammar. Parsing is

BC0056, Write a C program that illustrates the creation of child process us...

Write a C program that illustrates the creation of child process using fork system call. One process finds sum of even series and other process finds sum of odd series.

What problems arise if the directory is a general graph, What problems aris...

What problems arise if the directory structure is a general graph? Searching for a particular file may result in searching the similar directory many times. Deletion of the fil

Batch system, what is a batch system give me answer in simple words so that...

what is a batch system give me answer in simple words so that i can understand

Financial objective of corporation, The primary financial objective of corp...

The primary financial objective of corporation is usually taken to be the maximization of shareholder wealth. Discuss:- i. Ways in which the shareholder of a company can encour

Explain file, What is a file? A named collection of related data explai...

What is a file? A named collection of related data explained by the creator, recorded on secondary storage.

Write a short note about process, Write a short note about process. Unc...

Write a short note about process. Unceremoniously, a process is a program in implementation. A process is too much than the program code, which is occasionally known as the tex

Protection, protection in operating system

protection in operating system

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd