Certified concurrent abstraction layers

Ronghui Gu, Zhong Shao, Jieung Kim, Xiongnan Wu, Jérémie Koenig, Vilhelm Sjöberg, Hao Chen, D. Costanzo, T. Ramananandro
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引用次数: 74

Abstract

Concurrent abstraction layers are ubiquitous in modern computer systems because of the pervasiveness of multithreaded programming and multicore hardware. Abstraction layers are used to hide the implementation details (e.g., fine-grained synchronization) and reduce the complex dependencies among components at different levels of abstraction. Despite their obvious importance, concurrent abstraction layers have not been treated formally. This severely limits the applicability of layer-based techniques and makes it difficult to scale verification across multiple concurrent layers. In this paper, we present CCAL---a fully mechanized programming toolkit developed under the CertiKOS project---for specifying, composing, compiling, and linking certified concurrent abstraction layers. CCAL consists of three technical novelties: a new game-theoretical, strategy-based compositional semantic model for concurrency (and its associated program verifiers), a set of formal linking theorems for composing multithreaded and multicore concurrent layers, and a new CompCertX compiler that supports certified thread-safe compilation and linking. The CCAL toolkit is implemented in Coq and supports layered concurrent programming in both C and assembly. It has been successfully applied to build a fully certified concurrent OS kernel with fine-grained locking.
认证并发抽象层
由于多线程编程和多核硬件的普及,并发抽象层在现代计算机系统中无处不在。抽象层用于隐藏实现细节(例如,细粒度同步),并减少不同抽象级别的组件之间的复杂依赖关系。尽管并发抽象层的重要性显而易见,但它们并没有得到正式的处理。这严重限制了基于层的技术的适用性,并使跨多个并发层扩展验证变得困难。在本文中,我们介绍了CCAL——一个在CertiKOS项目下开发的完全机械化的编程工具包——用于指定、组合、编译和链接认证并发抽象层。CCAL由三个技术创新组成:一个新的博弈论,基于策略的并发组合语义模型(及其相关的程序验证器),一组用于组合多线程和多核并发层的正式链接定理,以及一个新的支持经过认证的线程安全编译和链接的CompCertX编译器。CCAL工具包是用Coq实现的,支持C语言和汇编语言的分层并发编程。它已经成功地应用于构建具有细粒度锁定的完全认证的并发操作系统内核。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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