第三届中国 Rust 开发者大会 Await-Tree Async Rust 可观测性的灵丹妙药 赵梓淇 Bugen Zhao Await-Tree Async Rust 可观测性的灵丹妙药 Await-Tree 的 设计原理与实现 2 回顾 Async Rust 的设计与痛点 1 Await-Tree 的 应用与真实案例 3 Await-Tree Async Rust 可观测性的灵丹妙药 设计原理与实现 2 回顾 Async Rust 的设计与痛点 1 Await-Tree 的 应用与真实案例 3 Async Rust 的优势 • 异步编程的共同优势 • async/await 关键字 • 用户态调度 • Async Rust 的独特优势 • Ownership 与 Lifetime • 无栈协程 Async Rust 回顾 Rust 的无栈协程抽象 — Future Future Async Rust 回顾 • 通过 poll 驱动的状态机 • 组合嵌套为调度单元： Task • async fn 语法糖 Async Rust 观测与调试的痛点 Async Rust 回顾 • 特性： Future 灵活的可组合性 • 任意定制 Poll 的执行逻辑 (Join / Select / Timeout) • 动态的调用关系 • 痛点：观测与调试工具无法理解灵活的执行逻辑

… … Stack Traces for Async Code are Unhelpful Threadpool threads: #0 process_file(...) #5 pool.run() #10 __clone … … IO Thread: #0 async_read_some_at(...) #3 ctx Threadpool threads: #0 process_file(...) #5 pool.run() #10 … IO Thread: … #0 async_read_some_at(...) #3 ctx.run() #5 __clone … … Main thread: #0 unifex::sync_wait( … #0 async_read_some_at(...) … #12 unifex::sync_wait(...) #16 main() #19 __libc_start_main() … … Async Stacks are BetterStructured Concurrency Makes Async Stacks Possible

Comprehensive Rust Martin Geisler Contents Welcome to Comprehensive Rust 11 1 Running the Course 13 1.1 Course Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.2 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2 Using Cargo 18 2.1 The Rust Ecosystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.2 Code Samples in This Welcome to Day 1 23 4 Hello, World 25 4.1 What is Rust? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 Benefits of Rust . . . . . . . . . . . . . . . . . . . . . . . . .

in Rust Alex Crichton What’s Rust? Rust is a systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety. Concurrency? Libraries Futures Rust? What’s Deadlocks • Use after free • Double free Exploitable! Concurrency? Libraries Futures Rust? What’s Rust? Rust is a systems programming language that runs blazingly fast, prevents segfaults, and guarantees cout << elem;
 } elem vector ... [0] [0] [1] Dangling pointer! Aliased pointers Mutation Rust’s Solution Ownership/Borrowing No runtime Memory Safety No data races C++ GC Ownership fn

Comprehensive Rust Martin Geisler 차 례 Comprehensive Rust 에 오신 것을 환영합니다 10 1 강의진행 12 1.1 강의구성 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.2 단축키 . . . . . . . . World! 23 4.1 러스트란? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.2 Rust 의이점 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3 플레이그라운드 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 IX 안드로이드 189 31 Welcome to Rust in Android 190 32 설치 191 33 빌드규칙 192 33.1 러스트바이너리 . . . . . . . . . . . . . . . . . . . . . . .

Rust for Linux Miguel Ojeda Wedson Almeida Filho Alex Gaynor Rust for Linux aims to add Rust support to the Linux kernel. We believe Rust offers key improvements over C in this domain. We hope improvement of Rust for everyone! Introduction Language Library Tooling Nightly features A general priority is to stabilize them (or to find alternatives): https://github.com/Rust-for-Linux/linux/issues/2 add w8, w10, w9 Language Memory model: future potential Unified/Compatible Linux kernel and Rust memory models: No need to use inline assembly to define a new memory model. Language-supported address

BENEFITS AND DRAWBACKS OF ADOPTING A SECURE PROGRAMMING LANGUAGE: RUST AS A CASE STUDY Kelsey Fulton, Anna Chan, Daniel Votipka, Michelle Mazurek, Michael Hicks 1 Memory safety vulnerabilities https://www.zdnet.com/article/chrome-70- of-all-security-bugs-are-memory-safety-issues/ Case Study: Rust ■ Attempt safety and performance (e.g., no GC) ■ Useful where C/C++ are hardest to replace ■ language? 3 Case Study: Rust ■ Semi-structured interview with senior developers (I = 16) ■ Survey with Rust community (S = 178) 4 Learning Rust ■ Rust is hard to learn. 5 Rust has “a near-vertical

Real world Rust Why and how we use Rust in TiKV 黄东旭 PingCAP 关于我 ● 黄东旭 Dongxu_Huang ● Open source hacker / Infrastructure Engineer ● MSRA / Netease / Wandoujia / PingCAP ● CTO of PingCAP ● Codis Go / Python / Rust ... What’s Rust ● Yet another system programming language ○ Maintain by Mozilla ● Stable: 1.13 ○ Stable enough for production use ● Alternative to C/C++ Why Rust? ● Safe ○ Thread ● Modern tool chain ○ Modern package management tools ○ Embedded unit test framework ● Stdlibs Rust 哲学 ● Zero-cost abstraction ● 内存安全 ○ Build-in RAII / Ownership ○ No NULL ptr ● 万物皆有所有权 ○ Ownership

Comprehensive Rust Martin Geisler 目次 Comprehensive Rust へようこそ 11 1 講座の運営について 13 1.1 講座の構成 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.2 キーボードショートカット . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2 Cargo の使用 18 2.1 Rust エコシステム . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.2 講座のサンプルコード . . . Day 1：AM 22 3 Day 1 へようこそ 23 4 Hello, World 25 4.1 Rust とは？ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 Rust のメリット . . . . . . . . . . . . . . . . . . . . . . . .

Comprehensive Rust Martin Geisler Contents Welcome to Comprehensive Rust 11 1 Running the Course 13 1.1 Course Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.2 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2 Using Cargo 19 2.1 The Rust Ecosystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.2 Code Samples in This Welcome to Day 1 24 4 Hello, World 26 4.1 What is Rust? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.2 Benefits of Rust . . . . . . . . . . . . . . . . . . . . . . . . .