If you are not sure why, you might try making a separate copy of this function for each interrupt type that you catch and see what causes the extra calls.

如果想细究其原因，可以尝试针对每种终止类型获得该函数的单独副本，研究产生额外调用的原因。

youdao

She was a good seamstress and would copy all the styles from the women’s magazines and sell the clothes to make some extra money.

她自己心灵手巧，她可以从那些女性时尚杂志上把衣服的样式都学下来，自己做衣服，然后再卖掉赚点钱。

youdao

One day I came across a copy of a fairly common microwave cookbook - the sort published by the appliance manufacturer to make a few extra dollars.

有一天，我偶然得手一本十分普通的微波炉食谱——就是那种电器制造商卖微波炉时为了多挣几个钱顺带着卖的食谱，不值钱的。

youdao

I could have done this in another way but I am going to just be extra deliberate so I make sure that this copy ends with back slash zero and voila, now, I have a copy.

我可以用另外一种方式来处理,我确保这个拷贝由反斜杠0结尾,那样，现在我得到了一个拷贝。

哈佛公开课 - 计算机科学课程节选

"No court has ever held that you're entitled to make one extra copy of a DVD, much less five, " Pulgram notes.

FORBES: Magazine Article

Patients should be encouraged to keep a copy of their medical records, not inconvenienced with burdensome processes and extra charges to obtain them.

CNN: Is your hospital hurting you?

The 32GB and 64GB storage options aren't shockers given the extra space Windows and the bundled copy of Office 2013 Home and Student 2013 will demand, but there's a treat for long-haul users in the battery -- it's been upgraded from the 7, 000maH pack of the Note 10.1 to an ample 8, 200mAh unit.

ENGADGET: Samsung introduces ATIV Tab: a 10.1-inch Windows RT tablet