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yuesong-feng avatar yuesong-feng commented on May 3, 2024

比如说此时返回的fd = 3，我电脑上虚拟机上运行的ptr的值为0x3，47行令一个Channel *ch = ptr 就是让ch指向0x3这个地址(❌)，接着第48行对ch指向的revents进行赋值(❌)。我的理解是在0x3作为起始地址的基础上，将revents相应位置0x13进行赋值(❌)。但是这样不会产生段错误吗？ (不会) 这样赋值是为了在union的内存后面再腾出4B来存放revents吗？ (不是)

可以先学一下C/C++语言，以及计算机组成原理，可以参考《深入理解计算机系统（第三版）》。

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RudyPeng avatar RudyPeng commented on May 3, 2024

不好意思，漏看了updataChannel中的代码，吸取教训了

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