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在XV6中执行停止的进程

[英]Executing a Stopped Process in XV6

原文 2016-01-16 08:19:03 2 1 c/ process/ operating-system/ kernel/ xv6

I wrote two new system calls and add them to the xv6 OS kernel. 我编写了两个新的系统调用，并将它们添加到xv6 OS内核中。 So using one system call I can save process state and using the other one I can reload the previous state and continue. 因此，使用一个系统调用可以保存进程状态，而使用另一个系统调用可以重新加载先前的状态并继续。 the problem is in the reloading section . 问题出在重装部分 。

is it enough to reload just the context of the process ? 仅重新加载流程上下文就足够了吗？ (i mean the struct context which contains some CPU register) （我的意思是包含一些CPU寄存器的struct context ）

1 个解决方案

No. 没有。

The process may have open files and pipes in proc->ofile , which you need to save/load. 该过程可能在proc->ofile具有打开的文件和管道，您需要保存/加载它们。

Note also that by the time you re-load a process, its parent may no longer exist. 还请注意，当您重新加载流程时， parent可能不再存在。
You'll really want to make sure your process isn't floating around without a real parent, or you'll be in for some fun bugs. 您真的要确保没有真正的父母时您的过程不会浮出水面，否则您会遇到一些有趣的错误。