“Reasoning about Exceptions”

Reasoning About Exceptions?

In this paper we propose an exception logic – formalizing reasoning about exceptions. We use this logic to defend two claims. First, we argue that default logic – formalizing reasoning about default assumptions – is an extension of exception logic. A deconstruction argument shows that reasoning about exceptions is one of the first principles of reasoning about default assumptions. Second, we ar...

Reasoning About Exceptions (Extended Abstract)

In this paper we analyze the conditional logic approach to default logic, the logic that formalizes reasoning about default assumptions.Conditional logic is a popular framework to formalize defeasible reasoning. The conditional sentence “if (the antecedent or condition) then by default (the consequent or conclusion)” is represented in this framework by the formula > , where ‘>’ is some kind of ...

Compiling and reasoning about exceptions and interrupts

Exceptions and interrupts are important for programming reliable software systems, yet our methods for reasoning about them are weak. In this thesis we explore the problem of compiling and reasoning about exceptions and interrupts in the context of a simple language. We develop the language in three stages, initially without any form of exceptions, then adding exceptions, and finally adding int...

Sound reasoning about unchecked exceptions: soundness proof

In this note we formalize a multithreaded Java-like programming language with unchecked exceptions, try-catch blocks, and synchronized blocks, as well as method contracts, object invariants, block invariants, thread-local objects, and parallel execution statements. We further formalize our verification condition generation-based modular static verification approach that verifies that the progra...

Exceptions in OO Languages: Using Them and Reasoning about Them