EasyNVR日志中堆栈信息打印为字节代码排查及优化

log.Printf("handle message failed, %v", p)
log.Println(debug.Stack())
其中 debug.Stack() 返回数据如下：
// Stack returns a formatted stack trace of the goroutine that calls it.
// It calls runtime.Stack with a large enough buffer to capture the entire trace.
func Stack() []byte {
   buf := make([]byte, 1024)
   for {
      n := runtime.Stack(buf, false)
      if n < len(buf) {
         return buf[:n]
      }
      buf = make([]byte, 2*len(buf))
   }
}

if p := recover(); p != nil {
   log.Printf("handle message failed, %v", p)
   log.Printf("debug stack : %v", string(debug.Stack()))
}