Debug Tools

Sunday. June 28, 2020 - 1 min

GDB

Ref: Linux Tools Quick Tutorial, GDB Debug Using Args, How to Debug Using GDB

Start GDB

1. When compiling, add ‘-g’ option: g++ -g hello.cpp -o hello

2. gdb hello

Arguments

1. (gdb) set args [arguments]

   eg: (gdb) set args -v test.v

Commands

1. run ( r ): run the program

2. continue ( c ): continue the debug

3. next ( n ): execute next line

4. step: step into a function

5. break [n] ( b [n] ): set breakpoint in line n

6. break [function] ( b [function] ): set breakpoint in the entrance of the function

7. break [file]:[n] ( b [file]:[n] ): set breakpoint in line n of the specified file

8. info breakpoints: list information of all breakpoints

9. disable [n]: disable break point n

10. list ( l ): show the source code

11. print [expression] ( p [expression] ): print the value of the expression

PDB

Ref: pdb - The Python Debugger

Start PDB

python -m pdb demo.py

Commands

1. next ( n ): execute next line

2. print ( p ): print the variable values

3. list ( l ): show the source code

4. step ( s ): step into a function

5. continue ( c ): continue the debug

6. break [n] ( b [n] ): set breakpoint in line n

Kaixin Yang

Keep on going.