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

Explain hierarchical paging, Hierarchical paging Single way is to use a...

Hierarchical paging Single way is to use a two-level paging algorithm, in which the page table itself is also paged. A logical address is separated into a page number and a pag

Define swapping, Define swapping. A process requires being in memory to...

Define swapping. A process requires being in memory to be executed. Though a process can be swapped temporarily out of memory to a backing store and then brought back into memo

Producer-consumer using condition variables, Now let us present an implemen...

Now let us present an implementation of a producer-consumer system using condition variables. This implementation works. dequeue() lock(A) while (queue empty) { wait(A, C)

Os, why we say" OS is a resource allocator" and “OS is a control program"?

why we say" OS is a resource allocator" and “OS is a control program"?

Principles of operating systems, Objective - Tiny Shell (tish) In this...

Objective - Tiny Shell (tish) In this exercise you will write a small shell program to run different programs in foreground and background mode. Background Usually when

Unix and linux commands, To explore the UNIX file system, use basic UNIX co...

To explore the UNIX file system, use basic UNIX commands and use a text editor. Task:   1.      Logon to Linux. 2.      Create a directory "Unix" under your home d

Explain the beginthread function used in the netware, Explain the BeginThre...

Explain the BeginThread Function used in the NetWare example code BeginThread(MyThread Function, stack,size, arg) BeginThread creates a thread and places it on the NetWar

Any four types of operating system feature and structure, explain any four...

explain any four types of operating system feature and structure(design)

Describe the file system architecture-device driver, Device Drivers ...

Device Drivers Communicates straight with peripheral devices (disks, tapes, etc.). Responsible for begin physical I/O operations on the device. Pro

What are scheduling queues?, What are scheduling queues? Since the proc...

What are scheduling queues? Since the processes enter the system they are put into job queue. This queue contains all processes in the system. The processes that are exist in m

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