How to debug golang

Today I will share with you an article about how to debug golang. It has a very good reference value. Friends who need it can take a look.

How to debug golang

You can use the GoLang debugging toolDelve

1. First get

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

2. Write test code

func main(){
 http.HandleFunc("/test",func(writer http.ResponseWriter,req *http.Request){
 //TODO
 })
 log.Fatal(http.ListenAndServe("127.0.0.1:8080",nil))
}

3. Start debug

dlv debug test.go

4. Breakpoint

1) For the method breakpoint:

b main.函数名

2) Run to the breakpoint:

c

3) For Break point of a certain line:

Need to get the location of the file and then break point:

b /Users/joker/go/src/…/test.go:14 对14行打断点

As for how to perform the same operation as on the ide: through n,s

n: Equivalent to F6 of Java-Eclipse

s: Equivalent to F5 of Java-Eclipse

How to view variables:p

p testName will output the value of testName

args: will output all method parameter information

locals: will output all local variables

Use Go play Debug, Info, Error level log

Directly upload the code:

package mylog
import (
    "log"
    "os"
)
var (
    Debug *log.Logger
    Info *log.Logger
    Error *log.Logger
)
func init() {
    log.Println("init ...")
    Debug = log.New(os.Stdout, "[DEBUG] ", log.Ldate|log.Ltime|log.Lshortfile)
    Info = log.New(os.Stdout, "[INFO] ", log.Ldate|log.Ltime|log.Lshortfile)
    Error = log.New(os.Stderr, "[ERROR] ", log.Ldate|log.Ltime|log.Lshortfile)
}
package main
import "mylog"
func main(){
  mylog.Debug.Println("good");
  mylog.Info.Println("good");
  mylog.Error.Println("good");
}

That’s it.

For more golang knowledge, please pay attention to the golang tutorial column on the PHP Chinese website.

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