Operating Systems project
This project aims to give you a quick tour of how to work with the xv6 operating system which has been developed at MIT for pedagogical purposes. At the end of the project, you will have a fine understanding of the xv6 and system calls. This guide will help you to get the xv6 up and running. Also, it provides some sources you may want to check out to get on the right path.
The following procedure has been tested on Debian, and should also work on Debian-based distributions such as Ubuntu or Mint. It is strongly suggested that you create an isolated workspace using tools like VirtualBox and a clean Ubuntu. You can also install it on your daily driver if you don’t mind. First, make sure to have all the dependencies.
After successfully installing the required programs, clone the Github repository of xv6 source code
Now just compile the kernel.
As your assignment, you will add a new system call to xv6. This system call will return the running processes (RUNNING & RUNNABLE) in the form of an array of proc_info structs. Keep in mind that the mentioned array should be sorted based on the memsize. If somehow you end up having two or more processes with the same memsize, just use the id (The sorting algorithm does not matter).
Note You cannot use malloc at the kernel level and it should only be used in user programs, so you can pass an array of struct proc_info with its size to the system call to fill the array.
Now, create a program to test the new system call. Use malloc & fork to create some new processes with different memory sizes.
Please, upload created and changed files as a ZIP file into Quera. also, attach a brief documentation on the works you have done and the problems you have faced.
- Add a new system call, named proc_dump to return the running processes sorted by their sizes.
- Create a new program to test proc_dump.
- Make sure to add the test program to the UPROGS section in Makefile.
● System Call ● XV6 GitHub ● Intro to XV6