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Reversible debuggers have been developed at least since 1970. Such a featureis useful when the cause of a bug is close in time to the bug manifestation.When the cause is far back in time, one resorts to setting appropriatebreakpoints in the debugger and beginning a new debugging session. For thesecases when the cause of a bug is far in time from its manifestation, bugdiagnosis requires a series of debugging sessions with which to narrow down thecause of the bug.  For such "difficult" bugs, this work presents an automated tool to searchthrough the process lifetime and locate the cause. As an example, the bug couldbe related to a program invariant failing. A binary search through the processlifetime suffices, since the invariant expression is true at the beginning ofthe program execution, and false when the bug is encountered. An algorithm forsuch a binary search is presented within the FReD (Fast Reversible Debugger)software. It is based on the ability to checkpoint, restart anddeterministically replay the multiple processes of a debugging session. It isbased on GDB (a debugger), DMTCP (for checkpoint-restart), and a customdeterministic record-replay plugin for DMTCP.  FReD supports complex, real-world multithreaded programs, such as MySQL andFirefox. Further, the binary search is robust. It operates on multi-threadedprograms, and takes advantage of multi-core architectures during replay.

FReD: Automated Debugging via Binary Search through a Process Lifetime