How to get the caller function name (caller) in a Go function

In the Go language, you can runtimeobtain the caller information through the Caller function in the package.

func Caller(skip int) (pc uintptr, file string, line int, ok bool)

• skip indicates which layer of call stack information to view, where 0 indicates the currently called Callerfunction.
• pc program counter
• file file
• line how many lines
• ok Is it possible to obtain call stack information?

for example

package main

import (
        "fmt"
        "runtime"
        "time"
)

func main() {

        test2()

        time.Sleep(2*time.Second)
}


func test2() {

        test1(0)

        test1(1)

        go test1(1)

}

func test1(skip int) {
        callerFuncName := "unknown"

        pc, file, line, ok := runtime.Caller(skip)

        if ok {
                fn := runtime.FuncForPC(pc)
                if fn != nil {
                        callerFuncName = fn.Name()
                }

                fmt.Printf("caller:%s, file:%s, line:%d\n", callerFuncName, file, line)
        }
}

output

caller:main.test1, file:/Users/lanyangyang/workspace/go_example/caller.go, line:30
caller:main.test2, file:/Users/lanyangyang/workspace/go_example/caller.go, line:21
caller:runtime.goexit, file:/usr/local/go/src/runtime/asm_amd64.s, line:1581

skip 0, caller is test1
skip 1, caller is test2

skip 1, a new goroutine executes test1, and the caller isruntime.goexit

reference

runtime