如何查找用户功能名称

我正在整理一个包含大量用户功能的大型程序。
为了处理潜在的错误消息，我打算提出一些错误捕获代码。
例如，在用户函数“test1”中，我将捕获潜在的错误并将它们转储到一个文件中，我想在其中写下错误消息来自用户函数“test1”。
当然，我还必须为所有其他用户功能执行此操作。
现在的问题是，如何知道用户函数中的用户函数名称，以便动态地知道用户函数的名称，而不是硬编码。谢谢！P.S。
如果有更好的方法来转储错误消息，请告诉我。



     以下为原文

  I am putting together a big program with a lot of userfunctions. In order to handle the potential error messages, I am planning to put some error catching codes. For example, in the userfunction "test1", I am going to catch the potential errors and dump them into a file, in which I want to write down that the error message originates from the userfunction "test1". Of course, I also have to do this for all other user functions. Now the questions is that, how can I know the user function's name inside that user function, in order to know the name of the user function dynamically, rather than hard code them.

Thanks!

P.S. If there is any better way to dump the error messages, please let me know.