信号处理程序有单独的堆栈吗？

Question

信号处理程序是否有单独的堆栈（就像每个线程都有单独的堆栈一样）？

这是在 Linux/C 上下文中。

Answer 1

来自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.