One of the important tasks of exception handling is to restore program state and invariants. Studies suggest that this is often done incorrectly. We introduce a new language construct that integrates automated memory recovery with exception handling. When an exception occurs, memory can be automatically restored to its previous state. We also provide a mechanism for applications to extend the automatic recovery mechanism with callbacks for restoring the state of external resources. We describe a logging-based implementation and evaluate its effect on performance. The implementation imposes no overhead on parts of the code that do not make use of this feature.<\/p>\n","protected":false},"excerpt":{"rendered":"
One of the important tasks of exception handling is to restore program state and invariants. Studies suggest that this is often done incorrectly. We introduce a new language construct that integrates automated memory recovery with exception handling. When an exception occurs, memory can be automatically restored to its previous state. 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