Ethos' Deeply Integrated Distributed Types

W. M. Petullo, Wenyuan Fei, Jon A. Solworth, Pat Gavlin
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引用次数: 3

Abstract

Programming languages have long incorporated type safety, increasing their level of abstraction and thus aiding programmers. Type safety eliminates whole classes of security-sensitive bugs, replacing the tedious and error-prone search for such bugs in each application with verifying the correctness of the type system. Despite their benefits, these protections often end at the process boundary, that is, type safety holds within a program but usually not to the file system or communication with other programs. Existing operating system approaches to bridge this gap require the use of a single programming language or common language runtime. We describe the deep integration of type safety in Ethos, a clean-slate operating system which requires that all program input and output satisfy a recognizer before applications are permitted to further process it. Ethos types are multilingual and runtime-agnostic, and each has an automatically generated unique type identifier. Ethos bridges the type-safety gap between programs by (1) providing a convenient mechanism for specifying the types each program may produce or consume, (2) ensuring that each type has a single, distributed-system-wide recognizer implementation, and (3) inescapably enforcing these type constraints.
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Ethos的深度集成分布式类型
编程语言很早就包含了类型安全,提高了它们的抽象级别,从而帮助了程序员。类型安全消除了所有类型的安全敏感错误,用验证类型系统的正确性取代了在每个应用程序中查找此类错误的繁琐和容易出错的工作。尽管有这些好处,但这些保护通常在进程边界结束,也就是说,类型安全只适用于程序,而不适用于文件系统或与其他程序的通信。现有的弥合这一差距的操作系统方法需要使用单一的编程语言或公共语言运行时。我们描述了Ethos中类型安全的深度集成,这是一个全新的操作系统,它要求所有程序输入和输出在允许应用程序进一步处理之前满足识别器。气质类型是多语言的,并且与运行时无关,每个类型都有一个自动生成的唯一类型标识符。Ethos通过(1)提供一种方便的机制来指定每个程序可能产生或使用的类型,(2)确保每个类型都有一个单一的、分布式的系统范围的识别器实现,以及(3)不可避免地执行这些类型约束,在程序之间架起了类型安全的桥梁。
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