根据abort()在manpage中的描述:The abort() first unblocks the SIGABRT signal, and then raises that signal for the calling process. This results in the abnormal termination &
signal: SIGKILL(9)/SIGSTOP(19)/(32)/(33)不能安装信号处理函数;sigaction: .sa_mask是用来屏蔽信号处理函数的集合; .sa_flags=SA_NODEFER,则本信号的信号处理函数可以被相同信号中断,但是如
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