Go compile time instrumentation Przemysław Delewski February 18, 2025 Warsaw, PolandAgenda 1. Short bio 2. Observability domain 3. OpenTelemetry 4. History of OpenTelemetry go compile time instrumentation founding member of the OpenTelemetry Go compile-time instrumentation project https://github.com/open-telemetry/community/blo b/main/projects/go-compile-instrumentation.mdSoftware complexity Today's software spanHistory of OpenTelemetry go instrumentationBeginnings of go instrumentation Everything started with two proposals: - https://github.com/open-telemetry/opentelemetry-go-instrumen tation/issues/3

together to ensure thorough software quality and reliability.Static Vs Runtime Runtime Static Compile timeStatic vs Runtime – Bounds Check Potential out of bounds write void foo(){ std::vector More Tests Production Detecting errors early in the development pipeline reduces costs, saves time, minimizes risk, and improves efficiency.Error Reporting - Goals Error messages should be clear, risks if used improperlyCompile-time Validation CompilerMech Suit or Swim? Choose between safety and flexibilityMech Suit that Swims Safety and flexibility at the same time Source: Gurren LaganRuntime

participate in game jams. • Enjoy experimenting, exploring, and trying new things in C++.Dive Into Compile-Time Parsers Libraries Use Cases Implementation Techniques Reflection Language Evolution API Operator overloading • Domain specific languages • Open source compile-time libraries • API • Design • Implementation details • Using compile-time parsers • Reflection • Examples: functions, types, treesParser parser("SELECT id, name WHERE age > 42"); std::vector result = func(cats);Example – Compile Time Parsers std::vector cats = { /*...*/ }; constexpr auto parser = create_parser(); constexpr

Stephen Brawner, Robottimo Robotics at Compile Time Optimizing Robotics Algorithms with c++’s Compile-Time FeaturesAbout me • Robotics Software Consultant based in Portland, OR • Chief Roboticist types of robots • Parses robot description from a plain-text file format • Requires lots of run-time decisions • Generally maintained by a corporate entity • ROS and ROS 2 ecosystem (Open Robotics/ platforms in mind • Generally required for real-time controls• video of FLX BOTRobotics Hardware Development • Requirements known well ahead of time • Mechanical and electrical designs are locked-in

/ 1/ Introduction Explore how C++20's constexper features can: Generate data from code at compile-time Be used to construct: Lookup Tables Con�guration Fuses Compressed Strings USB Descriptors 2 found building compile-time libraries 2 . 2/ constexpr in Brief Speci�es a variable or function CAN appear in a constant expression Constant expressions can be evaluated at compile-time eg: Array size MUST produce a compile-time constant Implies constexpr 4/ constinit Speci�es a variable has static initialization constant initialised (from a constant expression) computed at compile-time, and stored

Apex.AI, Inc. Errors have a high cost, so rigorous testing is a must We use increasingly more compile-time polymorphism and checks Question: how to test if something is compilable in a rigorous way? EXPECT_FLOAT_EQ(21.0F, get_half_of(42.0F)); EXPECT_DOUBLE_EQ(21.0, get_half_of(42.0)); // This should NOT compile: // get_half_of(23); }© 2021 Apex.AI, Inc. Now throw it into the rest of the code base ██████ EXPECT_FLOAT_EQ(21.0F, get_half_of(42.0F)); EXPECT_DOUBLE_EQ(21.0, get_half_of(42.0)); // This should NOT compile: // get_half_of(23); }© 2021 Apex.AI, Inc. And deliver it to the customers image: Flaticon.com

Agenda  Compile-Time Rational Numbers  Durations  Clocks  Time Points  Dates  Time Zones 4 Agenda  Compile-Time Rational Numbers  Durations  Clocks  Time Points   Dates  Time Zones5 Compile-Time Rational Numbers  Defined in  Work with rational numbers at compile time  Always normalized representation  Needed for durations in the library6 library6 Compile-Time Rational Numbers  Define a rational number: using r1 = ratio<1, 60>; // Represents 1/60  Retrieve numerator and denominator intmax_t num { r1::num }; intmax_t den { r1::den

Zero instrumentation monitoring with your first steps in eBPF Beatriz Martínez, Isovalent - @beatrizmrg October 28, 2020 2 What will we be doing? 3 How are we going to do it? 4 Demo time 5 Tracing Tracing Go function with uprobes 6 Demo time 7 Conclusions ● eBPF programs can be attached to different events: ○ Kprobes ○ uprobes ○ Tracepoints ○ network packets… ● Frameworks, Go bindings make it easier: ○ First approach: C, LLVM/CLANG, tc ○ Second approach: gobpf, bcc ● Non-instrumentation monitoring http://34.70.147.68 $curl 34.70.147.68:8083 Let’s represent the attendees in

第1章：Go 语言的起源，发展与普及 1.1 起源与发展 1.2 语言的主要特性与发展的环境和影响因素 第2章：安装与运行环境 2.1 平台与架构 2.2 Go 环境变量 2.3 在 Linux 上安装 Go 2.4 在 Mac OS X 上安装 Go 2.5 在 Windows 上安装 Go 2.6 安装目录清单 2.7 Go 运行时（runtime） 2.8 Go 解释器 第3章：编辑器、集成开发环境与其它工具 3.1 Go 开发环境的基本要求 3.2 编辑器和集成开发环境 3.3 调试器 3.4 构建并运行 Go 程序 3.5 格式化代码 3.6 生成代码文档 3.7 其它工具 3.8 Go 性能说明 3.9 与其它语言进行交互 第4章：基本结构和基本数据类型 4.1 文件名、关键字与标识符 4.2 Go 程序的基本结构和要素 4.3 常量 4 精密计算和 big 包 9.5 自定义包和可见性 9.6 为自定义包使用 godoc 9.7 使用 go install 安装自定义包 9.8 自定义包的目录结构、go install 和 go test 9.9 通过 Git 打包和安装 9.10 Go 的外部包和项目 9.11 在 Go 程序中使用外部库 第10章：结构（struct）与方法（method） 10.1 结构体定义 10

前言 原文出处：https://github.com/Unknwon/the-way-to-go_ZH_CN 用更少的代码，更短的编译时间，创建运行更快的程序，享受更多 的乐趣 对于学习 Go 编程语言的爱好者来说，这本书无疑是最适合你的一本书籍，这里包含了当前最全面的学习 资源。本书通过对官方的在线文档、名人博客、书籍、相关文章以及演讲的资料收集和整理，并结合我自 身在软件工程、编程语 开发出的软件能够很好地在现代的多核计算机上工作 开发出的软件能够很好地在网络环境下工作 使人们能够享受软件开发的过程 Go 语言就在这样的环境下诞生了，它让人感觉像是 Python 或 Ruby 这样的动态语言，但却又拥有像 C 或者 Java 这类语言的高性能和安全性。 Go 语言出现的目的是希望在编程领域创造最实用的方式来进行软件开发。它并不是要用奇怪的语法和晦 涩难懂的概念来从根本上推翻已有的编程语言，而是建立并改善了 来支持并发和并行编程。 这本书是为那些想要学习 Go 这门全新的，迷人的和充满希望的编程语言的开发者量身定做的。当然，你 在学习 Go 语言之前需要具备一些关于编程的基础知识和经验，并且拥有合适的学习环境，但你并不需要 对 C 或者 Java 或其它类似的语言有非常深入的了解。 对于那些熟悉 C 或者面向对象编程语言的开发者，我们将会在本书中用 Go 和一些编程语言的相关概念进 行比较（书中会使用大家所熟知的缩写