golang 打印error的堆栈信息操作

log.SetFlags(log.Llongfile| log.LstdFlags)
log.Println(e)

func DB()error{
	return errors.New("time out")
}
func Dao()error{
    if er:= DB();er!=nil{
    	 log.Println(er)
    	 return error
    }
    return nil
}
func Service()error{
    if er:= Dao();er!=nil{
    	 log.Println(er)
    	 return error
    }
    return nil
}
func Control()error{
    if er:= Service();er!=nil{
    	 log.Println(er)
    	 return error
    }
    return nil
}    

package main
import (
	"errors"
	"fmt"
	"github.com/fwhezfwhez/errorx"
)
func main() {
	if e := Control(); e != nil {
		e.(errorx.Error).PrintStackTrace()
		// log.Println(e.(errorx.Error).StackTrace())
	} else {
		Reply()
	}
}
// assume an engine to connect mysql
func DB() error {
	return errors.New("connect to mysql time out")
}
// handle database operation
func Dao() error {
	if er := DB(); er != nil {
		return errorx.New(er)
	}
	return nil
}
// handle logic service
func Service() error {
	if er := Dao(); er != nil {
		return errorx.Wrap(er)
	}
	return nil
}
// handle request distribute from main
func Control() error {
	if er := Service(); er != nil {
		return errorx.ReGen(er, errors.New("inner service error,please call admin for help"))
	}
	return nil
}
// reply a the request
func Reply(){
	fmt.Println("handle success")
}

package main
import (
    "fmt"
    "os"
    "runtime/debug"
    "time"
)
func TryE() {
    errs := recover()
    if errs == nil {
        return
    }
    exeName := os.Args[0] //获取程序名称
    now := time.Now()  //获取当前时间
    pid := os.Getpid() //获取进程ID
    time_str := now.Format("20060102150405")                          //设定时间格式
    fname := fmt.Sprintf("%s-%d-%s-dump.log", exeName, pid, time_str) //保存错误信息文件名:程序名-进程ID-当前时间（年月日时分秒）
    fmt.Println("dump to file ", fname)
    f, err := os.Create(fname)
    if err != nil {
        return
    }
    defer f.Close()
    f.WriteString(fmt.Sprintf("%v\r\n", errs)) //输出panic信息
    f.WriteString("========\r\n")
    f.WriteString(string(debug.Stack())) //输出堆栈信息
}

package main
import (
    "fmt"
    "time"
)
func main() {
    defer TryE()
    fmt.Println(time.Now())
    panic(-2)
    fmt.Println("panic restore now, continue.")
}