Debugging is a tedious and costly process that demands a profound understanding
of the dynamic behavior of programs. An omniscient debugger makes the task of
tracking down the root cause of bugs straightforward by enabling programmers to
seamlessly navigate a buggy program's execution history. So why don't we all
have an omniscient debugger in our favorite development environment? Are the
challenges of making omniscient debugging practical a definitive barrier to its
adoption? This article describes TOD, a scalable omniscient debugger for Java.
TOD is integrated into the Eclipse IDE and paves the way for practical
omniscient debugging.