Lab 1

Computer Architecture I @ ShanghaiTech University

Goals

Setup your Linux.
Setup Gradescope.
Learn some simple C programming.
Learn basic linux commands.

How Checkoffs Work

You'll notice that at the end of (almost) every exercise, there is a section labelled "Check-off." The items in this section are what you must successfully demonstrate to your TA in order to receive credit for completing the lab. Once you finish ALL of the exercises , you should put your names AND ShanghaiTech email address on the checkoff list on the board, and a TA will come and check you off. Labs are graded out of x points, which will evaluate to 100%. A lab is considered on-time if it is turned in within a week of the lab session in which it is initially assigned to you. For example, the lab assigned to you in this weeks lab is this document, lab 1. Thus, the latest you may get lab 1 checked off is the beginning of your lab next week.

Exercises

Exercise 1: Have a 64bit Linux installed

As CS students you should have a REAL Linux (e.g. Ubuntu) installed. In CS110 and CS110P, we recommend you installing Ubuntu 20.04 LTS (64bit) on your computer. If you are using an X86 computer (Intel or AMD), you should install it as dual boot. If you are using an ARM-based computer (e.g. Apple Silicon), contact us immediately. Note that some part of the lab may not work on macOS!

Show your TA the working Linux with gcc installed.

Exercise 2: Gradescope

Show the TA your gradescope account and that you finished HW1.

Exercise 3: Linux command

The following commands/programs are very useful in Linux.

cd
ls
pwd
mkdir
rm
cp
mv
cat
man

Explain the usage of each command to the TA.

Exercise 4: Linux command, cont.

In this section, learn a new command/program by reading the manual with command man:

grep

Unlike other operating systems, Linux users love package managers for installing and updating software. In Ubuntu, the package manager is called apt.

Install an interesting package with apt, if you have no idea which to choose, try cowsay.
Show the manual of grep and explain the usage to the TA.

At last, we understand that reading a large bunch of plain text in the terminal is not a good experience. However, this is necessary for programmers. Here we recommend you installing tldr to make your life easier.

Exercise 5: Sizes

Write a C program that displays the sizes (in byte) of different data types. You are only allowed to have one printf in the program - it has to be used inside a precompiler macro. This macro can only have one argument. Each type should be output in a new line similar to this (with correct values of course):


    Size of short: 3
    

    Size of int: 5

The sizes of the following types should be printed:

char
short
short int
int
long int
unsigned int
void *
size_t
float
double
int8_t
int16_t
int32_t
int64_t
time_t
clock_t
struct tm
NULL

Compile using:


    gcc -Wpedantic -Wall -Wextra -Wvla -Werror -std=c11

Use -m32 to compile it for 32bit and -m64 to compile it for 64bit. Note that you may need to install a package named gcc-multilib to compile with -m32.

Checkoff:

Explain what -Wpedantic, -Wall, -Wextra, -Wvla, -Werror and -std=c11 do.
Show and explain your source code to the TA.
Show the compilation of the 32bit and 64bit version to the TA.
Run both programs and explain the sizes and differences.