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Name:____________________________________ SID: _______________________
CSCE 351: Operating System Kernels
Lab 1 – User-Level Thread Management
Basic Setup:
• Accessibility to CSE
• Copy jumplab.tar from ~ylu/share/csce351/ directory
Objectives:
The objectives of this lab are as follows:
• Familiarize students with siglongjmp and sigsetjmp.
• Expose students to the basic debugging process with GDB.
• Expose students to the timer signal in Linux
• Lay ground work for programming assignment 1
Estimated Lab Time: 75 minutes
Introduction
The objective of this exercise is to familiarize students with two standard C library
functions sigsetjmp and siglongjmp. Function sigsetjmp can be used to save the context of
the processor (e.g. registers) and stack environment into a buffer. This context can then
be retrieved using siglongjmp. The first time that sigsetjmp is called, it will return 0.
However, if it is returning from siglongjmp, it would return non-zero value. For more
information about these functions, check the UNIX/Linux man page.
Activity 1: Introduction to sigsetjmp and siglongjmp
For this activity, you will need to log-in to crow.unl.edu. Once log-in, obtain the program
from /home/fac/ylu/share/csce351/jumplab.zip. You can copy this file directly to your
directory. Once in your directory, unzip the file and you should have a folder called jumplab
in your directory. In jumplab directory, we will examine program jump.c (listed below)
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <setjmp.h>
#include <string.h>
