CS_learn/rust-based-os-comp2022
1
0
Fork 0
mirror of https://github.com/LearningOS/rust-based-os-comp2022.git synced 2026-02-08 04:43:27 +08:00
Code Issues Packages Projects Releases Wiki Activity
Files
gh-pages
rust-based-os-comp2022/chapter5/0intro.html
chyyuu 4232360197 deploy: b97f399538
2022-07-03 05:43:26 +00:00

560 lines
36 KiB
HTML
Raw Permalink Blame History

This file contains invisible Unicode characters
This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!doctype html>
<html class="no-js" lang="zh_CN">
<head><meta charset="utf-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1"/>
<meta name="color-scheme" content="light dark"><link rel="index" title="索引" href="../genindex.html" /><link rel="search" title="搜索" href="../search.html" /><link rel="next" title="与进程有关的重要系统调用" href="1process.html" /><link rel="prev" title="第五章：进程及进程管理" href="index.html" />
<meta name="generator" content="sphinx-4.1.2, furo 2021.08.31"/>
<title>引言 - Open-Source-OS-Training-Camp-2022 文档</title>
<link rel="stylesheet" type="text/css" href="../_static/pygments.css" />
<link rel="stylesheet" type="text/css" href="../_static/styles/furo.css?digest=c7c65a82b42f6b978e58466c1e9ef2509836d916" />
<link rel="stylesheet" type="text/css" href="../_static/tabs.css" />
<link rel="stylesheet" type="text/css" href="../_static/styles/furo-extensions.css?digest=16fb25fabf47304eee183a5e9af80b1ba98259b1" />
<link rel="stylesheet" type="text/css" href="../_static/my_style.css" />
<style>
body {
--color-code-background: #f8f8f8;
--color-code-foreground: black;
}
body[data-theme="dark"] {
--color-code-background: #202020;
--color-code-foreground: #d0d0d0;
}
@media (prefers-color-scheme: dark) {
body:not([data-theme="light"]) {
--color-code-background: #202020;
--color-code-foreground: #d0d0d0;
}
}
</style></head>
<body>
<script>
document.body.dataset.theme = localStorage.getItem("theme") || "auto";
</script>
<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
<symbol id="svg-toc" viewBox="0 0 24 24">
<title>Contents</title>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
<path stroke="none" d="M0 0h24v24H0z" />
<line x1="4" y1="6" x2="20" y2="6" />
<line x1="10" y1="12" x2="20" y2="12" />
<line x1="6" y1="18" x2="20" y2="18" />
</svg>
</symbol>
<symbol id="svg-menu" viewBox="0 0 24 24">
<title>Menu</title>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather-menu">
<line x1="3" y1="12" x2="21" y2="12"></line>
<line x1="3" y1="6" x2="21" y2="6"></line>
<line x1="3" y1="18" x2="21" y2="18"></line>
</svg>
</symbol>
<symbol id="svg-arrow-right" viewBox="0 0 24 24">
<title>Expand</title>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather-chevron-right">
<polyline points="9 18 15 12 9 6"></polyline>
</svg>
</symbol>
<symbol id="svg-sun" viewBox="0 0 24 24">
<title>Light mode</title>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="feather-sun">
<circle cx="12" cy="12" r="5"></circle>
<line x1="12" y1="1" x2="12" y2="3"></line>
<line x1="12" y1="21" x2="12" y2="23"></line>
<line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line>
<line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line>
<line x1="1" y1="12" x2="3" y2="12"></line>
<line x1="21" y1="12" x2="23" y2="12"></line>
<line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line>
<line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line>
</svg>
</symbol>
<symbol id="svg-moon" viewBox="0 0 24 24">
<title>Dark mode</title>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-moon">
<path stroke="none" d="M0 0h24v24H0z" fill="none" />
<path d="M12 3c.132 0 .263 0 .393 0a7.5 7.5 0 0 0 7.92 12.446a9 9 0 1 1 -8.313 -12.454z" />
</svg>
</symbol>
<symbol id="svg-sun-half" viewBox="0 0 24 24">
<title>Auto light/dark mode</title>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="icon-tabler-shadow">
<path stroke="none" d="M0 0h24v24H0z" fill="none"/>
<circle cx="12" cy="12" r="9" />
<path d="M13 12h5" />
<path d="M13 15h4" />
<path d="M13 18h1" />
<path d="M13 9h4" />
<path d="M13 6h1" />
</svg>
</symbol>
</svg>
<input type="checkbox" class="sidebar-toggle" name="__navigation" id="__navigation">
<input type="checkbox" class="sidebar-toggle" name="__toc" id="__toc">
<label class="overlay sidebar-overlay" for="__navigation">
<div class="visually-hidden">Hide navigation sidebar</div>
</label>
<label class="overlay toc-overlay" for="__toc">
<div class="visually-hidden">Hide table of contents sidebar</div>
</label>
<div class="page">
<header class="mobile-header">
<div class="header-left">
<label class="nav-overlay-icon" for="__navigation">
<div class="visually-hidden">Toggle site navigation sidebar</div>
<i class="icon"><svg><use href="#svg-menu"></use></svg></i>
</label>
</div>
<div class="header-center">
<a href="../index.html"><div class="brand">Open-Source-OS-Training-Camp-2022 文档</div></a>
</div>
<div class="header-right">
<div class="theme-toggle-container theme-toggle-header">
<button class="theme-toggle">
<div class="visually-hidden">Toggle Light / Dark / Auto color theme</div>
<svg class="theme-icon-when-auto"><use href="#svg-sun-half"></use></svg>
<svg class="theme-icon-when-dark"><use href="#svg-moon"></use></svg>
<svg class="theme-icon-when-light"><use href="#svg-sun"></use></svg>
</button>
</div>
<label class="toc-overlay-icon toc-header-icon" for="__toc">
<div class="visually-hidden">Toggle table of contents sidebar</div>
<i class="icon"><svg><use href="#svg-toc"></use></svg></i>
</label>
</div>
</header>
<aside class="sidebar-drawer">
<div class="sidebar-container">
<div class="sidebar-sticky"><a class="sidebar-brand" href="../index.html">
<span class="sidebar-brand-text">Open-Source-OS-Training-Camp-2022 文档</span>
</a><form class="sidebar-search-container" method="get" action="../search.html" role="search">
<input class="sidebar-search" placeholder=搜索 name="q" aria-label="搜索">
<input type="hidden" name="check_keywords" value="yes">
<input type="hidden" name="area" value="default">
</form>
<div id="searchbox"></div><div class="sidebar-scroll"><div class="sidebar-tree">
<p class="caption" role="heading"><span class="caption-text">正文</span></p>
<ul class="current">
<li class="toctree-l1 has-children"><a class="reference internal" href="../0setup-devel-env.html">第零章：实验环境配置</a><input class="toctree-checkbox" id="toctree-checkbox-1" name="toctree-checkbox-1" role="switch" type="checkbox"/><label for="toctree-checkbox-1"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter1/index.html">第一章：应用程序与基本执行环境</a><input class="toctree-checkbox" id="toctree-checkbox-2" name="toctree-checkbox-2" role="switch" type="checkbox"/><label for="toctree-checkbox-2"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter1/0intro.html">引言</a></li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter1/1app-ee-platform.html">应用程序执行环境与平台支持</a><input class="toctree-checkbox" id="toctree-checkbox-3" name="toctree-checkbox-3" role="switch" type="checkbox"/><label for="toctree-checkbox-3"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter1/2remove-std.html">移除标准库依赖</a><input class="toctree-checkbox" id="toctree-checkbox-4" name="toctree-checkbox-4" role="switch" type="checkbox"/><label for="toctree-checkbox-4"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter1/3mini-rt-usrland.html">构建用户态执行环境</a><input class="toctree-checkbox" id="toctree-checkbox-5" name="toctree-checkbox-5" role="switch" type="checkbox"/><label for="toctree-checkbox-5"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter1/4mini-rt-baremetal.html">构建裸机执行环境</a><input class="toctree-checkbox" id="toctree-checkbox-6" name="toctree-checkbox-6" role="switch" type="checkbox"/><label for="toctree-checkbox-6"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter2/index.html">第二章：批处理系统</a><input class="toctree-checkbox" id="toctree-checkbox-7" name="toctree-checkbox-7" role="switch" type="checkbox"/><label for="toctree-checkbox-7"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter2/0intro.html">引言</a></li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter2/2application.html">实现应用程序</a><input class="toctree-checkbox" id="toctree-checkbox-8" name="toctree-checkbox-8" role="switch" type="checkbox"/><label for="toctree-checkbox-8"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter2/3batch-system.html">实现批处理操作系统</a><input class="toctree-checkbox" id="toctree-checkbox-9" name="toctree-checkbox-9" role="switch" type="checkbox"/><label for="toctree-checkbox-9"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l2 has-children"><a class="reference internal" href="../chapter2/4trap-handling.html">实现特权级的切换</a><input class="toctree-checkbox" id="toctree-checkbox-10" name="toctree-checkbox-10" role="switch" type="checkbox"/><label for="toctree-checkbox-10"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter3/index.html">第三章：多道程序与分时多任务</a><input class="toctree-checkbox" id="toctree-checkbox-11" name="toctree-checkbox-11" role="switch" type="checkbox"/><label for="toctree-checkbox-11"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter3/0intro.html">引言</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter3/1multi-loader.html">多道程序放置与加载</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter3/2task-switching.html">任务切换</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter3/3multiprogramming.html">管理多道程序</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter3/4time-sharing-system.html">分时多任务系统</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter3/5exercise.html">chapter3练习</a></li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter4/index.html">第四章：地址空间</a><input class="toctree-checkbox" id="toctree-checkbox-12" name="toctree-checkbox-12" role="switch" type="checkbox"/><label for="toctree-checkbox-12"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter4/0intro.html">引言</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter4/3sv39-implementation-1.html">实现 SV39 多级页表机制（上）</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter4/4sv39-implementation-2.html">实现 SV39 多级页表机制（下）</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter4/5kernel-app-spaces.html">内核与应用的地址空间</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter4/6multitasking-based-on-as.html">基于地址空间的分时多任务</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter4/7exercise.html">chapter4练习</a></li>
</ul>
</li>
<li class="toctree-l1 current has-children"><a class="reference internal" href="index.html">第五章：进程及进程管理</a><input checked="" class="toctree-checkbox" id="toctree-checkbox-13" name="toctree-checkbox-13" role="switch" type="checkbox"/><label for="toctree-checkbox-13"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="current">
<li class="toctree-l2 current current-page"><a class="current reference internal" href="#">引言</a></li>
<li class="toctree-l2"><a class="reference internal" href="1process.html">与进程有关的重要系统调用</a></li>
<li class="toctree-l2"><a class="reference internal" href="2core-data-structures.html">进程管理的核心数据结构</a></li>
<li class="toctree-l2"><a class="reference internal" href="3implement-process-mechanism.html">进程管理机制的设计实现</a></li>
<li class="toctree-l2"><a class="reference internal" href="4exercise.html">chapter5练习</a></li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter6/index.html">第六章：文件系统与I/O重定向</a><input class="toctree-checkbox" id="toctree-checkbox-14" name="toctree-checkbox-14" role="switch" type="checkbox"/><label for="toctree-checkbox-14"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/0intro.html">引言</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/1file-descriptor.html">文件与文件描述符</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/1fs-interface.html">文件系统接口</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/2fs-implementation-1.html">简易文件系统 easy-fs (上)</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/2fs-implementation-2.html">简易文件系统 easy-fs (下)</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/3using-easy-fs-in-kernel.html">在内核中使用 easy-fs</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter6/4exercise.html">chapter6练习</a></li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter7/index.html">第七章：进程间通信</a><input class="toctree-checkbox" id="toctree-checkbox-15" name="toctree-checkbox-15" role="switch" type="checkbox"/><label for="toctree-checkbox-15"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter7/0intro.html">引言</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter7/1pipe.html">管道</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter7/2cmdargs-and-redirection.html">命令行参数与标准 I/O 重定向</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter7/3exercise.html">chapter7练习</a></li>
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../chapter8/index.html">第八章：并发</a><input class="toctree-checkbox" id="toctree-checkbox-16" name="toctree-checkbox-16" role="switch" type="checkbox"/><label for="toctree-checkbox-16"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul>
<li class="toctree-l2"><a class="reference internal" href="../chapter8/0intro.html">引言</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter8/1thread-kernel.html">内核态的线程管理</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter8/2lock.html">锁机制</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter8/3semaphore.html">信号量机制</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter8/4condition-variable.html">条件变量机制</a></li>
<li class="toctree-l2"><a class="reference internal" href="../chapter8/5exercise.html">chapter8 练习</a></li>
</ul>
</li>
</ul>
<p class="caption" role="heading"><span class="caption-text">附录</span></p>
<ul>
<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-a/index.html">附录 A：Rust 系统编程资料</a><input class="toctree-checkbox" id="toctree-checkbox-17" name="toctree-checkbox-17" role="switch" type="checkbox"/><label for="toctree-checkbox-17"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-b/index.html">附录 B：常见工具的使用方法</a><input class="toctree-checkbox" id="toctree-checkbox-18" name="toctree-checkbox-18" role="switch" type="checkbox"/><label for="toctree-checkbox-18"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-c/index.html">附录 C：深入机器模式：RustSBI</a><input class="toctree-checkbox" id="toctree-checkbox-19" name="toctree-checkbox-19" role="switch" type="checkbox"/><label for="toctree-checkbox-19"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../appendix-d/index.html">附录 D：RISC-V相关信息</a></li>
</ul>
<p class="caption" role="heading"><span class="caption-text">开发注记</span></p>
<ul>
<li class="toctree-l1 has-children"><a class="reference internal" href="../setup-sphinx.html">修改和构建本项目</a><input class="toctree-checkbox" id="toctree-checkbox-20" name="toctree-checkbox-20" role="switch" type="checkbox"/><label for="toctree-checkbox-20"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
<li class="toctree-l1 has-children"><a class="reference internal" href="../rest-example.html">reStructuredText 基本语法</a><input class="toctree-checkbox" id="toctree-checkbox-21" name="toctree-checkbox-21" role="switch" type="checkbox"/><label for="toctree-checkbox-21"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
</ul>
</li>
</ul>
</div>
</div>
</div>
</div>
</aside>
<div class="main">
<div class="content">
<article role="main">
<div class="content-icon-container">
<div class="theme-toggle-container theme-toggle-content">
<button class="theme-toggle">
<div class="visually-hidden">Toggle Light / Dark / Auto color theme</div>
<svg class="theme-icon-when-auto"><use href="#svg-sun-half"></use></svg>
<svg class="theme-icon-when-dark"><use href="#svg-moon"></use></svg>
<svg class="theme-icon-when-light"><use href="#svg-sun"></use></svg>
</button>
</div>
<label class="toc-overlay-icon toc-content-icon" for="__toc">
<div class="visually-hidden">Toggle table of contents sidebar</div>
<i class="icon"><svg><use href="#svg-toc"></use></svg></i>
</label>
</div>
<div class="section" id="id1">
<h1>引言<a class="headerlink" href="#id1" title="永久链接至标题"></a></h1>
<div class="section" id="id2">
<h2>本章导读<a class="headerlink" href="#id2" title="永久链接至标题"></a></h2>
<div class="admonition note">
<p class="admonition-title">注解</p>
<p>基于github classroom的开发方式</p>
<p>基于github classroom，可方便建立开发用的git repository，并可基于github的 codespace （在线版ubuntu +vscode）在线开发使用。整个开发环境仅仅需要一个网络浏览器。</p>
<ol class="arabic simple">
<li><p>在网络浏览器中用自己的 github id 登录 github.com</p></li>
<li><p>接收 <a class="reference external" href="https://classroom.github.com/a/RxB6h4-x">第三个实验(os5)的github classroom在线邀请</a> ，根据提示一路选择OK即可。</p></li>
<li><p>完成第二步后，你的第三个实验的 github repository 会被自动建立好，点击此github repository的链接，就可看到你要完成的第一个实验了。</p></li>
<li><p>在你的第三个实验的网页的中上部可以看到一个醒目的 <cite>code</cite> 绿色按钮，点击后，可以进一步看到 <cite>codespace</cite> 标签和醒目的 <cite>create codesapce on main</cite> 绿色按钮。请点击这个绿色按钮，就可以进入到在线的ubuntu +vscode环境中</p></li>
<li><p>再按照下面的环境安装提示在vscode的 <cite>console</cite> 中安装配置开发环境：rustc，qemu等工具。注：也可在vscode的 <cite>console</cite> 中执行 <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">codespaces_setenv</span></code> 来自动安装配置开发环境（执行``sudo``需要root权限，仅需要执行一次）。</p></li>
<li><p>在vscode的 <cite>console</cite> 中执行 <cite>make setupclassroom_test5</cite> （该命令仅执行一次）配置githubclassroom 自动评分功能。</p></li>
<li><p>然后就可以基于在线vscode进行开发、运行、提交等完整的实验过程了。</p></li>
</ol>
<p>上述的3，4，5步不是必须的，你也可以线下本地开发。</p>
<p>注：如果是本地的ubuntu中建立开发环境，可在shell中执行 <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">ubuntu_local_setenv</span></code> 来自动安装配置开发环境（执行``sudo``需要root权限，仅需要执行一次）。</p>
</div>
<p>我们将开发一个用户 <strong>终端</strong> (Terminal) 或 <strong>命令行</strong> (Command Line Application, 俗称 <strong>Shell</strong> ) ，
形成用户与操作系统进行交互的命令行界面 (Command Line Interface)。</p>
<p>为此，我们要对任务建立新的抽象： <strong>进程</strong> ，并实现若干基于 <strong>进程</strong> 的强大系统调用。</p>
<div class="admonition note">
<p class="admonition-title">注解</p>
<p><strong>任务和进程的关系与区别</strong></p>
<p>第三章提到的 <strong>任务</strong> 是这里提到的 <strong>进程</strong> 的初级阶段，与任务相比，进程能在运行中创建 <strong>子进程</strong> 、
用新的 <strong>程序</strong> 内容覆盖已有的 <strong>程序</strong> 内容、可管理更多物理或虚拟 <strong>资源</strong> 。</p>
</div>
</div>
<div class="section" id="id3">
<h2>实践体验<a class="headerlink" href="#id3" title="永久链接至标题"></a></h2>
<p>在 qemu 模拟器上运行`lab3(os5)参考框架: &lt;<a class="reference external" href="https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os5-ref">https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os5-ref</a>&gt;`_ ：</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git clone <span class="sb">``</span>gitaddr of github-classroom-build-lab3<span class="sb">``</span>
<span class="gp">$ </span><span class="nb">cd</span> <span class="sb">``</span>github-classroom-build-lab3<span class="sb">``</span>
<span class="gp">$ </span>make setupclassroom_test5 //注意：这一步很重要，是用于github classroom自动评测你的工作。这一步只需在首次克隆项目仓库时执行一次，以后一般就不用执行了，除非 .github/workflows/classroom.yml发生了变化。
<span class="gp">$ </span><span class="nb">cd</span> os5-ref
<span class="gp">$ </span>make run
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">注解</p>
<p>实验名称 ：实验编号</p>
<ul class="simple">
<li><p>lab0-0 : test1</p></li>
<li><p>lab0-1：test2</p></li>
<li><p>lab1：test3</p></li>
<li><p>lab2：test4</p></li>
<li><p>lab3：test5</p></li>
<li><p>lab4：test6</p></li>
<li><p>lab5：test8</p></li>
</ul>
</div>
<p>待内核初始化完毕之后，将在屏幕上打印可用的应用列表并进入shell程序：</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>[rustsbi] RustSBI version 0.2.0-alpha.4
.______ __ __ _______.___________. _______..______ __
| _ \ | | | | / | | / || _ \ | |
| |_) | | | | | | (----`---| |----`| (----`| |_) || |
| / | | | | \ \ | | \ \ | _ &lt; | |
| |\ \----.| `--' |.----) | | | .----) | | |_) || |
| _| `._____| \______/ |_______/ |__| |_______/ |______/ |__|
[rustsbi] Implementation: RustSBI-QEMU Version 0.0.1
[rustsbi-dtb] Hart count: cluster0 with 1 cores
[rustsbi] misa: RV64ACDFIMSU
[rustsbi] mideleg: ssoft, stimer, sext (0x222)
[rustsbi] medeleg: ima, ia, bkpt, la, sa, uecall, ipage, lpage, spage (0xb1ab)
[rustsbi] pmp0: 0x80000000 ..= 0x800fffff (rwx)
[rustsbi] pmp1: 0x80000000 ..= 0x807fffff (rwx)
[rustsbi] pmp2: 0x0 ..= 0xffffffffffffff (---)
[rustsbi] enter supervisor 0x80200000
[kernel] Hello, world!
/**** APPS ****
ch2b_bad_address
ch2b_bad_instructions
ch2b_bad_register
ch2b_hello_world
ch2b_power_3
ch2b_power_5
ch2b_power_7
ch3b_sleep
ch3b_sleep1
ch3b_yield0
ch3b_yield1
ch3b_yield2
ch5b_exit
ch5b_forktest
ch5b_forktest2
ch5b_forktest_simple
ch5b_forktree
ch5b_initproc
ch5b_user_shell
**************/
Rust user shell
&gt;&gt;
</pre></div>
</div>
<p>可以通过输入ch5b开头的应用来测试ch5实现的fork等功能:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>&gt;&gt; ch5b_forktest_simple
sys_wait without child process test passed!
parent start, pid = 2!
ready waiting on parent process!
hello child process!
child process pid = 3, exit code = 100
Shell: Process 2 exited with code 0
</pre></div>
</div>
</div>
<div class="section" id="id4">
<h2><a class="reference external" href="https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os5-ref">lab3(os5)参考框架:</a><a class="headerlink" href="#id4" title="永久链接至标题"></a></h2>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span>├── os5-ref
<span class="linenos"> 2</span>   ├── build.rs(修改：基于应用名的应用构建器)
<span class="linenos"> 3</span>   ├── ...
<span class="linenos"> 4</span>   └── src
<span class="linenos"> 5</span>   ├── ...
<span class="linenos"> 6</span>   ├── loader.rs(修改：基于应用名的应用加载器)
<span class="linenos"> 7</span>   ├── main.rs(修改)
<span class="linenos"> 8</span>   ├── mm(修改：为了支持本章的系统调用对此模块做若干增强)
<span class="linenos"> 9</span>   │   ├── address.rs
<span class="linenos">10</span>   │   ├── frame_allocator.rs
<span class="linenos">11</span>   │   ├── heap_allocator.rs
<span class="linenos">12</span>   │   ├── memory_set.rs
<span class="linenos">13</span>   │   ├── mod.rs
<span class="linenos">14</span>   │   └── page_table.rs
<span class="linenos">15</span>   ├── syscall
<span class="linenos">16</span>   │   ├── fs.rs(修改：新增 sys_read)
<span class="linenos">17</span>   │   ├── mod.rs(修改：新的系统调用的分发处理)
<span class="linenos">18</span>   │   └── process.rs（修改：新增 sys_getpid/fork/exec/waitpid）
<span class="linenos">19</span>   ├── task
<span class="linenos">20</span>   │   ├── context.rs
<span class="linenos">21</span>   │   ├── manager.rs(新增：任务管理器，为上一章任务管理器功能的一部分)
<span class="linenos">22</span>   │   ├── mod.rs(修改：调整原来的接口实现以支持进程)
<span class="linenos">23</span>   │   ├── pid.rs(新增：进程标识符和内核栈的 Rust 抽象)
<span class="linenos">24</span>   │   ├── processor.rs(新增：处理器管理结构 ``Processor`` ，为上一章任务管理器功能的一部分)
<span class="linenos">25</span>   │   ├── switch.rs
<span class="linenos">26</span>   │   ├── switch.S
<span class="linenos">27</span>   │   └── task.rs(修改：支持进程机制的任务控制块)
<span class="linenos">28</span>   └── trap
<span class="linenos">29</span>   ├── context.rs
<span class="linenos">30</span>   ├── mod.rs(修改：对于系统调用的实现进行修改以支持进程系统调用)
<span class="linenos">31</span>   └── trap.S
<span class="linenos">32</span>
<span class="linenos">33</span>cloc os
<span class="linenos">34</span>-------------------------------------------------------------------------------
<span class="linenos">35</span>Language files blank comment code
<span class="linenos">36</span>-------------------------------------------------------------------------------
<span class="linenos">37</span>Rust 29 180 138 2049
<span class="linenos">38</span>Assembly 4 20 26 229
<span class="linenos">39</span>make 1 11 4 36
<span class="linenos">40</span>TOML 1 2 1 13
<span class="linenos">41</span>-------------------------------------------------------------------------------
<span class="linenos">42</span>SUM: 35 213 169 2327
<span class="linenos">43</span>-------------------------------------------------------------------------------
</pre></div>
</div>
</div>
</div>
</article>
<footer>
<div class="related-pages">
<a class="next-page" href="1process.html">
<div class="page-info">
<div class="context">
<span>Next</span>
</div>
<div class="title">与进程有关的重要系统调用</div>
</div>
<svg><use href="#svg-arrow-right"></use></svg>
</a>
<a class="prev-page" href="index.html">
<svg><use href="#svg-arrow-right"></use></svg>
<div class="page-info">
<div class="context">
<span>Previous</span>
</div>
<div class="title">第五章：进程及进程管理</div>
</div>
</a>
</div>
<div class="related-information">
Copyright &#169; OS2022Summer
|
Built with <a href="https://www.sphinx-doc.org/">Sphinx</a>
and
<a class="muted-link" href="https://pradyunsg.me">@pradyunsg</a>'s
<a href="https://github.com/pradyunsg/furo">Furo theme</a>.
|
<a class="muted-link" href="../_sources/chapter5/0intro.rst.txt"
rel="nofollow">
显示源代码
</a>
</div>
</footer>
</div>
<aside class="toc-drawer">
<div class="toc-sticky toc-scroll">
<div class="toc-title-container">
<span class="toc-title">
目录
</span>
</div>
<div class="toc-tree-container">
<div class="toc-tree">
<ul>
<li><a class="reference internal" href="#">引言</a><ul>
<li><a class="reference internal" href="#id2">本章导读</a></li>
<li><a class="reference internal" href="#id3">实践体验</a></li>
<li><a class="reference internal" href="#id4">lab3(os5)参考框架:</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
</aside>
</div>
</div><script data-url_root="../" id="documentation_options" src="../_static/documentation_options.js"></script>
<script src="../_static/jquery.js"></script>
<script src="../_static/underscore.js"></script>
<script src="../_static/doctools.js"></script>
<script src="../_static/scripts/main.js"></script>
<script kind="utterances">
var commentsRunWhenDOMLoaded = cb => {
if (document.readyState != 'loading') {
cb()
} else if (document.addEventListener) {
document.addEventListener('DOMContentLoaded', cb)
} else {
document.attachEvent('onreadystatechange', function() {
if (document.readyState == 'complete') cb()
})
}
}
var addUtterances = () => {
var script = document.createElement("script");
script.type = "text/javascript";
script.src = "https://utteranc.es/client.js";
script.async = "async";
script.setAttribute("repo", "LearningOS/rust-based-os-comp2022");
script.setAttribute("issue-term", "pathname");
script.setAttribute("theme", "github-light");
script.setAttribute("label", "comments");
script.setAttribute("crossorigin", "anonymous");
sections = document.querySelectorAll("div.section");
if (sections !== null) {
section = sections[sections.length-1];
section.appendChild(script);
}
}
commentsRunWhenDOMLoaded(addUtterances);
</script>
<script src="../_static/translations.js"></script>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink