内存空间缺口——通过栈溢出、缓冲区溢出或堆错误来实现，以宿主进程的权限执行攻击者提供的任何代码。
Memory space breach — Accomplished via stack overflow, buffer overrun, or heap error, enables execution of arbitrary code supplied by the attacker with the permissions of the host process.
通过使用栈上的原始值，我们就可以在不使用当前存储区的前提下完成工作。
By using primitive values on the stack, we can do work without using the current memory area.
通过将栈深度限制为三层，您应该能避免意外行为。
By restricting the stack depth to three levels, you should avoid unexpected behaviour.
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