How to debug golang application

Golang is a very popular and new programming language with some amazing features and a good ecosystem. Due to its excellent performance and ease of use, more and more software engineers are willing to adopt Golang to develop applications. However, problems will inevitably be encountered during the development process, so how to debug golang applications? This article will introduce some common debugging tips and tools to help you troubleshoot errors in Golang applications.

1. Use fmt.Printf to output the value of the variable

During the debugging process, the easiest way may be to print the output to understand the actual status of the program at runtime. Golang provides the fmt.Printf function, which can output the value of a variable to the standard output device. Using fmt.Printf becomes especially important when you need to debug, it can help you diagnose errors or potential problems in your code. For example, before the program runs a key method, add the following code at the beginning of the method:

fmt.Println("variableName=", variableName)

2. Use the official debugging tool provided by Golang

Golang comes with it There are some great tools to help you debug your code. For example, you can use the GDB debugger to step through a Golang application and inspect the program status. GDB is a powerful debugging tool that can be used in many languages, especially C and C++. However, if you want to use GDB to debug Golang applications, you need to use a special version of GDB.

In addition to GDB, Golang also provides a debugger called Delve. Delve is mainly used for Golang debugging. It provides functions such as setting break points, single-stepping, etc. Delve has a graphical user interface and supports interactive and non-interactive debugging. You can start the Delve debugger by entering dlv at the command line.

3. Use third-party tools for debugging

In addition to Golang’s own debugging tools, there are also some third-party tools that can help you debug Golang applications. For example, you can debug Golang applications using Goland, a very popular integrated development environment (IDE).

Goland provides some very powerful tools, such as debugger, code completion, etc. You can use Goland to set breakpoints, check the value of variables, single-step and other functions. Additionally, it can help you identify errors in your code, provide suggestions, and more.

In addition to Goland, you can also try to use Visual Studio Code for debugging. This is a lightweight tool that provides very good debugging functions, including setting break points, single-step running, etc.

4. Using remote debugging

If you need to debug with a program on a remote server when developing a Golang application, you can use remote debugging tools. This requires you to set up a remote debugger and then debug the program with an IDE or GDB on your local development machine. Remote debugging can be done via SSH or other protocols.

Summary

Golang is a modern programming language that provides good performance and easy-to-use features, making more and more software engineers choose to adopt Golang. Problems will inevitably be encountered during the development process, and debugging is the key to solving them. This article introduces some common Golang debugging techniques and tools. I hope this information can help you debug more efficiently when developing applications using Golang.

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