golang函数错误处理调用栈递归打印

package errh

import (
    "dog/util/log"
    "runtime"
)

func Dao(err error) error {
    if err != nil {
        for i := 1; ; i++ {
            pc, file, line, ok := runtime.Caller(i)
            if !ok {
                break
            }
            f := runtime.FuncForPC(pc)
            if f.Name() != "runtime.main" && f.Name() != "runtime.goexit" {
                log.Error.Println("file:", file, "line:", line, "funcName:", f.Name(), "error:", err.Error())
            }
        }
    }
    return err
}