Lab Assignment--Compile and Debug

Lab Code

To get the sample and exercise code, please use the following commands in your Lab 2 folder:

   wget www.labs.cs.uregina.ca/330/CompileDebug/Lab2.zip
   unzip Lab2.zip

Part 1 - Makefile

Use the code in the replit teams project

There is a makefile already in the project. Of note are:

it uses gcc instead of g++, which means that you will be writing pure C code
it provides the options to debug the program later. Any guesses what you will be doing?

Modify the makefile to:

target this exercises's C files
include at least one variable (Not compile, will be lab demo
;
include a valgrind target so that you can type "make valgrind"

Part 2 - Fix the Code

The code provided should compile; but it contains several logic errors.

Use gdb and valgrind to help you find these errors.

In the end, when you run your code through valgrind, with the following command:

valgrind --leak-check=yes ./your_executable

you should see a message similar to the following:

==5583== HEAP SUMMARY:
==5583==     in use at exit: 0 bytes in 0 blocks
==5583==   total heap usage: 1 allocs, 1 frees, 400 bytes allocated
==5583== 
==5583== All heap blocks were freed -- no leaks are possible
==5583== 
==5583== For counts of detected and suppressed errors, rerun with: -v
==5583== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 8 from 6)

Part 3 - Capture: "make", "valgrind", and "gdb"

In this part, you will bring together all of the tools from this lab into one script. Follow the steps below using your debugged code from this lab:

script scriptname (use your own "scriptname")
make clean
make valgrind (this should compile the code and run valgrind on it)
gdb executable (substitute your own executable name)
Set a breakpoint on the findMax function (in the functions.c file)
run the code with an input of 50 for the size of the array
Using length, print all of the elements in the array
print the value stored at max's address
use next as many times as needed (inside the "for" loop) to see the value stored at max's address change
After the value stored at max's address has been modified inside the "for" loop, print the value stored at max's address
Use until at the "for" loop to skip over the other iterations of the loop
print the value stored at max's address
use next to continue through the code until you get a message that your program or process "exited normally"
quit the debugger
exit the script

Deliverables in URCourses: 3 code files, 1 makefile, 1 script file

Debugged code: main.c, functions.c, and functions.h
Makefile for the project.

with at least one variable and valgrind target
when submitting, please rename as makefile.txt

Script of make, valgrind, and gdb from Part 3 (named with a .txt extension)

Notes

Do not create a zip file
Submission is on UR Courses
Submit your own work
Be mindful that your assignment is due two hours before the start of your next lab