信号手有一个单独的堆栈吗？

Question

信号处理程序是否有单独的堆栈，（如每个线程都有单独的堆栈）？

这是在Linux/C上下文中。

Answer 1

在Linux手册页signal(7)：

By default, the signal handler is invoked on the normal process stack. 
It is possible to arrange that the signal handler uses an alternate stack; 
see sigaltstack(2) for a discussion of how to do this and when it might 
be useful.