Book Image

Mastering Go - Second Edition

By : Mihalis Tsoukalos
Book Image

Mastering Go - Second Edition

By: Mihalis Tsoukalos

Overview of this book

Often referred to (incorrectly) as Golang, Go is the high-performance systems language of the future. Mastering Go, Second Edition helps you become a productive expert Go programmer, building and improving on the groundbreaking first edition. Mastering Go, Second Edition shows how to put Go to work on real production systems. For programmers who already know the Go language basics, this book provides examples, patterns, and clear explanations to help you deeply understand Go’s capabilities and apply them in your programming work. The book covers the nuances of Go, with in-depth guides on types and structures, packages, concurrency, network programming, compiler design, optimization, and more. Each chapter ends with exercises and resources to fully embed your new knowledge. This second edition includes a completely new chapter on machine learning in Go, guiding you from the foundation statistics techniques through simple regression and clustering to classification, neural networks, and anomaly detection. Other chapters are expanded to cover using Go with Docker and Kubernetes, Git, WebAssembly, JSON, and more. If you take the Go programming language seriously, the second edition of this book is an essential guide on expert techniques.
Table of Contents (15 chapters)

The Go assembler

This section will briefly talk about the assembly language and the Go assembler, which is a Go tool that allows you to see the assembly language used by the Go compiler.

As an example, you can see the assembly language of the goEnv.go program you saw in the previous section of this chapter by executing the next command:

$ GOOS=darwin GOARCH=amd64 go tool compile -S goEnv.go
  

The value of the GOOS variable defines the name of the target operating system whereas the value of the GOARCH variable defines the compilation architecture. The preceding command was executed on a macOS Mojave machine, hence the use of the darwin value for the GOOS variable.

The output of the previous command is pretty large even for a small program such as goEnv.go. Some of its output is next:

"".main STEXT size=859 args=0x0 locals=0x118
   0x0000 00000 (goEnv.go:8)       TEXT...