信号处理程序是否有单独的堆栈？

Question

信号处理程序是否有单独的堆栈（每个线程都有单独的堆栈）？

这是在Linux / C环境中。

Answer 1

从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.