runtime.goexit() 只是退出当前的goroutinue os.exit()会退出主进程

package main

import (
    "fmt"
    "os"
    "runtime"
    "sync"
    "time"
)

var wg sync.WaitGroup

func testFunc1(wg *sync.WaitGroup) {
    defer wg.Done()
    for i := 0; i < 10; i++ {
        fmt.Println("testFunc1")
        time.Sleep(1*1000000000)
    }
    runtime.Goexit()
}

func testFunc2(wg *sync.WaitGroup){
    defer wg.Done()
    for{
        fmt.Println("testFunc2")
        time.Sleep(1*1000000000)
    }
}

func testFunc3(wg *sync.WaitGroup){
    defer wg.Done()
    for i:=0; i<1000000000000;i++{
        continue
    }
    os.Exit(0)
}
func testFun4()  {
    os.Exit(12)
}

func main()  {
    wg.Add(1)
    //go testFunc1(&wg)
    go testFunc2(&wg)
    //go testFunc3(&wg)
    go testFun4()
    wg.Wait()
}