1.1 简介. https://mp.weixin.qq.com/s/20ACZFyQiUWZf5cIm_ZW-w Freebsd的内核内存分配器叫做UMA(Universal Memory Allocator),这篇文章只关心它的安全特性,对于常规功能实现请读者朋友参考网络上的其他文章。它的安全功能特性相比XNU、NT、LINUX都少了很多,并且还存在一些不安全的构架设计,下面将会详细分析。 1.2 架构设计缺点. UMA的总体架构也是基于solaris slab, 我们直接看最底层的slab结构,一个slab大小为PAGE_SIZE,slab的管理体结构依据slab里的每个item大小而决定….



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