If you develop software, sooner or later you will find that he does not always behave as desired. This book distills decades of hard-earned experience gained in the trenches of software development professionals, giving you a head-start and equip you with the tools you need to get to the bottom of the problem, whatever you are faced with. Whether you're writing Java or assembly language, targeting the server or embedded micro-controller, using agile or traditional approach, the same principle applies basic bug-fixing. From developing software that is easy to debug (and coincidentally less may contain bugs in the first place), through the handling of bug reports to improve your main launch, we will close the entire bug life-cycle. You will learn about the empirical approach, which utilizes the unique capabilities of your software to show what really happened, the importance of looking and comfortable facilities that can be relied upon to reproduce the bug, and common pitfalls so you can avoid them. You will see how to use tools commonly available to automatically detect problems before they are reported by customers and how to build a "transparent software" that provides access to critical information and internal state.