Due to the asynchronous nature of signals , it is difficult to point out the bug caused when a signal - handling function triggers a non - reentrant function 由于信號(hào)在本質(zhì)上是異步的,所以難以找出當(dāng)信號(hào)處理函數(shù)觸發(fā)某個(gè)不可重入函數(shù)時(shí)導(dǎo)致的bug 。