GDB debugger installation and use

VScode Lack of compiler and debugger, need to use GDB debug
Want to use gdb debug , Add... When compiling the program -g
That is to say

gcc -g main.c -o main

gdb When debugging , Use the Enter key You can repeat the previous command
gdb When there is too much debugging information , Use Ctrl + l You can clear the screen

If you want to see the code while debugging, you can install this tool
terminator

sudo apt-get install terminator

Call tool

terminator

Then right click on the terminal to select the vertical division into two terminals , Then you can debug while using

Get into gdb debugging , Yes -g Executable to compile （ The terminal will be displayed in green ）

gdb XXX
 #XXX Is the name of the executable 

When checking whether the executable file is available for debugging , Directly follow the above command to enter , If the output shows yes

no debugging symbols found....done

It means that the executable file does not contain any debugging information

sign out gdb debugging

quit

gdb Direct operation

run
# It can also be abbreviated as 
r

gdb On a line （n） Add a breakpoint

break n
# It can also be abbreviated as 
b n
# there n Is the number of lines in a line 

View the established breakpoints

info breakpoints 

View a variable at a time (i) Value

print i

# It can also be abbreviated as 
p i 

Always display and output a variable （i） Value

display i

Skip the current breakpoint and continue

continue
# It can also be abbreviated as 
c

Check the program code up, down, left and right of the current breakpoint

list
# It can also be abbreviated as 
l