Linux basics (4) Gdb debugging program

Gdb debugging note: Must I add the Gcc compilation option? G. exit GDB: quit or Ctrl & amp; 43; D. the debugging process is as follows: 1.

Gdb debugging

Note:-g must be added to the Gcc compilation options.

Exit GDB: quit or Ctrl + d

 

 

Debugging process:

1. View files

Command:(Gdb) l

 

2. set breakpoints

Command:(Gdb) B row number

 

 

Note: up to 17th rows are stopped, and 17 rows are not executed.

3. view the breakpoint info B

 

4. run code r

Command:(Gdb) r

(You can also specify the row to start running, and add the row number after r)

 

 

5. View variable value p

Command:(Gdb) p variable name

 

 

6. set monitoring point: watch z (variable name)

It can also be a complex expression.

 

 

7. one-step operation

 

Command:(Gdb) n(Process by process)

 

8. step by step, it will enter the function

Command:(Gdb) s

9. conditional breakpoint

Change normal breakpoint to conditional breakpoint: condition

For example:Condition 1 I = 10

The checkpoint 1 is paused only when the condition I = 1 is met.

 

 

10. resume program running c

Command:(Gdb) c

(The program will run. if there is no breakpoint, the remaining part will be run. if there is a breakpoint, it will run to the next breakpoint)

 

11. remove breakpoints

Clear line_number

Clear filename: line_number

12. help

12.1 help find the category

 

 

12.2help from the list