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Bidirectional debugging and error recovery have different goals (programmer productivity and system reliability, respectively), yet they both require the ability to roll-back the program or the system to a past state. This rollback functionality is typically implemented using checkpoints that can restore the system/application to a specific point in time. There are several types of checkpoints, and...
Programs written in languages allowing direct access to memory through pointers often contain memory-related faults, which cause nondeterministic failures and security vulnerabilities. We present a new dynamic tainting technique to detect illegal memory accesses. When memory is allocated, at runtime, we taint both the memory and the corresponding pointer using the same taint mark. Taint marks are...
Bidirectional execution is a powerful debugging technique that allows program execution to proceed both forward and in reverse. Many software-only techniques and tools have emerged that use checkpointing and replay to provide the effect of reverse execution, although with considerable performance overheads in both forward and reverse execution. Recent hardware proposals for checkpointing and execution...
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