Golang framework debugger usage tutorial

The Go framework debugger provides developers with powerful debugging tools. You can start a debugging session using the dlv command line tool. Commonly used commands include: setting breakpoints (b), single-stepping (n), continuing execution (c), single-stepping function calls (step), single-stepping the current statement (next), and outputting variable values ​​(print).

Go framework debugger usage tutorial

Introduction

The debugger is used Tools designed to help developers find and fix program errors. The Go framework provides a built-in debugger that allows you to easily debug your code.

Enable debugging information

To enable debugging information when compiling, you need to add -gcflags="-N -l"## to the command line # Flags:

go build -gcflags="-N -l"

Start debugging session

To start a debugging session, you can use the

dlv command line tool. dlv is the command line interface for the Go framework debugger.

Installation

dlv:

go get github.com/go-delve/delve/cmd/dlv

Start debugging session:

dlv debug ./your-program

Common commands

• b: Set breakpoint
• n: Single step execution
• c: Continue execution
• step: Single-step function call
• next: Single-step execution of the current statement
• print: Output variable value
• eval: Calculation expression

Practical case

Let us create a simple

Hello World program and try to debug using dlv:

package main

import "fmt"

func main() {
    fmt.Println("Hello World")
}

Now, let's run

dlv for debugging:

dlv debug ./helloworld.go

Set a breakpoint at

fmt.Println On statement:

(dlv) b fmt.Println

Continue program execution:

(dlv) c

The program will pause at the breakpoint. You can use the

print command to output variable values, for example:

(dlv) print n
1

This is an example showing how to use

dlv to debug a Go program.

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