a good debugger supports different kinds of breakpoints, offers rich data visualization capabilities, has a REPL for executing expressions, can show the dependencies between threads and control their execution, can pick up changes in the source code and apply them without restarting the program, can step through the code backward and rewind the program state to any point in history, and can even record the entire program execution and visualize control flow and data flow history.
I should mention that the perfect debugger doesn’t exist.
