Debugging

Question 1

What are the 2 key issues in debugging?

Answer 1

Understanding why the program misbehaves and correcting the behaviour

Question 2

What are bad ways to debug?

Answer 2

Blame computer
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Question 3

Good debugging involves _______

Answer 3

investigation

Question 4

What are the steps in understanding a bug?

Answer 4

Forego assumptions
Reproduce the bug
Ask why the code produced the wrong behavior
Rank the hypotheses
Try to disprove each hypothesis

Question 5

What are some basic commands for exploring code in debuggers?

Answer 5

Running
Breakpoints
Stepping
Continuing
Backtraces

Question 6

What are some basic commands for investigating code in debuggers?

Answer 6

Printing state
Calling functions
Changing state and continuing
Watchpoints

Question 7

Why is Record and Replay debugging so powerful?

Answer 7

Allows a deterministic replay of the same execution

Trace can be shared across computers