Safe programming languages are readily available, but many applications continue to be written in unsafe languages, because the latter are more efficient. As a consequence, many applications continue to have exploitable memory safety bugs. Since garbage collection is a major source of inefficiency in the implementation of safe languages, replacing it with safe manual memory management would be an important step towards solving this problem.<\/p>\n
Previous approaches to safe manual memory management use programming models based on regions, unique pointers, borrowing of references, and ownership types. We propose a much simpler programming model that does not require any of these concepts. Starting from the design of an imperative type safe language (like Java or C#), we just add a delete operator to free memory explicitly and an exception which is thrown if the program dereferences a pointer to freed memory. We propose an efficient implementation of this programming model that guarantees type safety. Experimental results from our implementation based on the C# native compiler show that this design achieves up to 3x reduction in peak working set and run time.<\/p>\n","protected":false},"excerpt":{"rendered":"
Safe programming languages are readily available, but many applications continue to be written in unsafe languages, because the latter are more efficient. As a consequence, many applications continue to have exploitable memory safety bugs. Since garbage collection is a major source of inefficiency in the implementation of safe languages, replacing it with safe manual memory 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