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引言 – C*:开发与证明一体化
EN | 中文 作为信息系统的基石,操作系统、编译器、虚拟机、数据库等系统软件,构筑起整个数字社会的运行底座。这类软件一旦出现故障,往往会引发灾难性后果。近年来,从云服务大面积瘫痪到操作系统突发崩溃,各类故障屡见不鲜,带来了惨重的经济损失与社会秩序混乱。保障系统软件安全稳定,早已不是锦上添花,而是数字时代必须守住的基本防线。 在各种安全保障手段中,类型系统、静态分析、动态测试、模型检查各有所长,但都只能覆盖特定类型的问题,难以从整体上杜绝缺陷。形式化证明为此提供了更坚实的安全保障:依托严谨的数学推理,可证明程序在任意场景下都能符合设计规约,根除实现环节的缺陷。例如,经过形式化证明的微内核 seL4,被部署于 DARPA 军用无人直升机等高安全场景,被广泛视为安全操作系统的标杆之一;经过形式化证明的 C 编译器 CompCert,在大规模测试中未发现任何实现错误,已被空客等航空企业应用于安全攸关的飞控软件开发中。 遗憾的是,形式化证明至今仍是业内少数专家才能驾驭的“技术奢侈品”。问题根源并非证明技术能力不足,而在于开发与证明的相互割裂:就拿最常用的 C 语言来说,开发者基于命令式风格完成
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| Last read | 30 Sep 2026 |
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