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authorWe-unite <3205135446@qq.com>2025-01-07 12:36:05 +0800
committerWe-unite <3205135446@qq.com>2025-01-07 12:36:05 +0800
commit4d88ef666eee1b6f191f6e85b00acf8d5a2d1899 (patch)
tree68391846bae84f9546b0d089c012afc336a6e6bd /code/projects/godo.html
parent11e64c5804b696f170b9d5d881befbabc4a4e85c (diff)
downloadmyweb-new_highlightjs.tar.gz
myweb-new_highlightjs.zip
highlight don't use auto-detect but given languagenew_highlightjs
In this commit, lot's of things is changed. Hope they all runs currectly. Now highlight.js is supporting more and more proguam languages, but the auto detection always go wrong, even for common languages like c, bash, python, makefile. Use Given Language ------------------ As you know, I always write markdown and convert to html by pandoc. In the old, "```cpp" in markdown will be deleted first to keep the embeded code clean and not highlighted, then I can use highlight.js. But this causes that html document doesn't know the language. This time, md2html.sh is changed: pandoc use "--no-highlight" argument to keep code clean, and it will output like this: ```html <pre class="cpp"><code>...</code></pre> ``` Although there may be other tags between `<code></code>`, it's clear that `<pre class="xxx"><code>` is nested tightly, except some space characters or \n. Then, sed deal with the whole doc(not line by line), replace `<pre class="xxx"><code>` with `<pre><code class="language-xxx">`. That's it! Math Formula ------------ Math formular is also a problem during convertion by pandoc. In the old it's dealed menually. Now pandoc use "--mathjax=none", then formula is no longer showed by pandoc, but only `<span class="math xxx">\( formula \)</span>`. And the math tool I used will deal with it. Mermaid picture ---------------- pandoc doesn't support convert mermaid in markdown to html picture. Let's have a warning!
Diffstat (limited to 'code/projects/godo.html')
-rw-r--r--code/projects/godo.html26
1 files changed, 14 insertions, 12 deletions
diff --git a/code/projects/godo.html b/code/projects/godo.html
index ed64840..c967797 100644
--- a/code/projects/godo.html
+++ b/code/projects/godo.html
@@ -6,15 +6,16 @@
6 <meta name="generator" content="pandoc" /> 6 <meta name="generator" content="pandoc" />
7 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" /> 7 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
8 <title>godo知识总结</title> 8 <title>godo知识总结</title>
9 <link rel="stylesheet" href="https://test.qin-juan-ge-zhu.top/common/CSS/pandoc.css"> 9 <link rel="stylesheet" href="https://www.qin-juan-ge-zhu.top/common/CSS/pandoc.css">
10 <script type="text/javascript" src="https://test.qin-juan-ge-zhu.top/common/js/myhighlight.js"></script> 10 <script type="text/javascript" src="https://www.qin-juan-ge-zhu.top/common/script4code.js"></script>
11 <script type="text/javascript" src="https://test.qin-juan-ge-zhu.top/common/script4code.js"></script>
12</head> 11</head>
13 12
14<body> 13<body>
15 <div class="pandoc"> 14 <div class="pandoc">
16 <div class="main"> 15 <div class="main">
17 <p class="title">godo知识总结</p> 16 <header id="title-block-header">
17 <p class="title">godo知识总结</p>
18 </header>
18 <h1 id="背景说明">背景说明</h1> 19 <h1 id="背景说明">背景说明</h1>
19 <p>本文档对<a href="https://git.qin-juan-ge-zhu.top/godo">godo</a>编写过程中新了解到的技术、遇到的问题进行简要说明，以备所需。</p> 20 <p>本文档对<a href="https://git.qin-juan-ge-zhu.top/godo">godo</a>编写过程中新了解到的技术、遇到的问题进行简要说明，以备所需。</p>
20 <h1 id="系统调用">系统调用</h1> 21 <h1 id="系统调用">系统调用</h1>
@@ -31,7 +32,7 @@
31 <li>在 C 语言中直接调用同名函数，但大概率经过了 glibc 的封装</li> 32 <li>在 C 语言中直接调用同名函数，但大概率经过了 glibc 的封装</li>
32 <li>手动封装。如下：</li> 33 <li>手动封装。如下：</li>
33 </ul> 34 </ul>
34 <pre><code>#include &lt;stdio.h&gt; 35 <pre><code class="language-c">#include &lt;stdio.h&gt;
35#include &lt;sys/syscall.h&gt; 36#include &lt;sys/syscall.h&gt;
36#include &lt;sys/types.h&gt; 37#include &lt;sys/types.h&gt;
37#include &lt;sys/wait.h&gt; 38#include &lt;sys/wait.h&gt;
@@ -50,7 +51,7 @@ int main(){
50 return 0; 51 return 0;
51}</code></pre> 52}</code></pre>
52 <p>这种封装方式与经常被用来当作 os 教材的 Linux-0.11/0.12 有所区别。Linux-0.11 环境上，unistd.h 大致如下：</p> 53 <p>这种封装方式与经常被用来当作 os 教材的 Linux-0.11/0.12 有所区别。Linux-0.11 环境上，unistd.h 大致如下：</p>
53 <pre><code>#ifndef _UNISTD_H 54 <pre><code class="language-c">#ifndef _UNISTD_H
54#define _UNISTD_H 55#define _UNISTD_H
55 56
56... 57...
@@ -102,7 +103,7 @@ return -1; \
102 103
103#endif</code></pre> 104#endif</code></pre>
104 <p>可以看到，Linux-0.11 上，封装的一般方法为：</p> 105 <p>可以看到，Linux-0.11 上，封装的一般方法为：</p>
105 <pre><code>#define __LIBRARY__ // 一定要在unistd.h之前 106 <pre><code class="language-c">#define __LIBRARY__ // 一定要在unistd.h之前
106#include &lt;unistd.h&gt; 107#include &lt;unistd.h&gt;
107#include &lt;stdio.h&gt; 108#include &lt;stdio.h&gt;
108 109
@@ -124,13 +125,13 @@ int main() {
124 tasks 表里的一个 task，而每个 task 才具有独一无二的 id</strong>。</p> 125 tasks 表里的一个 task，而每个 task 才具有独一无二的 id</strong>。</p>
125 <h3 id="常见系统调用的分析">常见系统调用的分析</h3> 126 <h3 id="常见系统调用的分析">常见系统调用的分析</h3>
126 <p>看看这个：</p> 127 <p>看看这个：</p>
127 <pre><code>extern int pthread_create (pthread_t *__restrict __newthread, 128 <pre><code class="language-c">extern int pthread_create (pthread_t *__restrict __newthread,
128 const pthread_attr_t *__restrict __attr, 129 const pthread_attr_t *__restrict __attr,
129 void *(*__start_routine) (void *), 130 void *(*__start_routine) (void *),
130 void *__restrict __arg) __THROWNL __nonnull ((1, 3));</code></pre> 131 void *__restrict __arg) __THROWNL __nonnull ((1, 3));</code></pre>
131 <p><code>pthread_create</code>函数的第一个参数，就是一个 pthread_t 类型的指针，处理后将 task 的 id 写到指针指向的区域。</p> 132 <p><code>pthread_create</code>函数的第一个参数，就是一个 pthread_t 类型的指针，处理后将 task 的 id 写到指针指向的区域。</p>
132 <p>让我们来看一段简单的代码：</p> 133 <p>让我们来看一段简单的代码：</p>
133 <pre><code>// test.c 134 <pre><code class="language-c">// test.c
134#include &lt;stdio.h&gt; 135#include &lt;stdio.h&gt;
135#include &lt;pthread.h&gt; 136#include &lt;pthread.h&gt;
136#include &lt;sys/syscall.h&gt; 137#include &lt;sys/syscall.h&gt;
@@ -160,7 +161,7 @@ int main() {
160 return 0; 161 return 0;
161}</code></pre> 162}</code></pre>
162 <p>当我们使用<code>strace ./test</code>来查看上述代码时，会发现情况如下：</p> 163 <p>当我们使用<code>strace ./test</code>来查看上述代码时，会发现情况如下：</p>
163 <pre><code>clone(child_stack=0x7f3dd28bbff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f3dd28bc9d0, tls=0x7f3dd28bc700, child_tidptr=0x7f3dd28bc9d0) = 21756 164 <pre><code class="language-c">clone(child_stack=0x7f3dd28bbff0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f3dd28bc9d0, tls=0x7f3dd28bc700, child_tidptr=0x7f3dd28bc9d0) = 21756
164write(1, &quot;main: thread 139903502108416\n&quot;, 29) = 29 165write(1, &quot;main: thread 139903502108416\n&quot;, 29) = 29
165clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f3dd308e9d0) = 21757 166clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f3dd308e9d0) = 21757
166--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21757, si_uid=1000, si_status=0, si_utime=0, si_stime=0} --- 167--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21757, si_uid=1000, si_status=0, si_utime=0, si_stime=0} ---
@@ -173,7 +174,7 @@ exit_group(0) = ?
173 <p>从这样的输出里，我们可以清晰地看到，<strong>无论是<code>pthread_create</code>还是<code>fork</code>（指库函数），本质上都是封装了<code>clone</code>系统调用，即使 174 <p>从这样的输出里，我们可以清晰地看到，<strong>无论是<code>pthread_create</code>还是<code>fork</code>（指库函数），本质上都是封装了<code>clone</code>系统调用，即使
174 Linux 本身提供了专门的 fork 系统调用。</strong>也许这是 glibc 和 Linux 都想在添加功能的基础上保证代码兼容性？花开两朵各表一枝了属于是。</p> 175 Linux 本身提供了专门的 fork 系统调用。</strong>也许这是 glibc 和 Linux 都想在添加功能的基础上保证代码兼容性？花开两朵各表一枝了属于是。</p>
175 <p>这一结论也可以从 glibc 的代码中得到验证：</p> 176 <p>这一结论也可以从 glibc 的代码中得到验证：</p>
176 <pre><code>// 文件 glibc-2.18/nptl/sysdeps/unix/sysv/linux/pt-fork.c 177 <pre><code class="language-c">// 文件 glibc-2.18/nptl/sysdeps/unix/sysv/linux/pt-fork.c
177pid_t 178pid_t
178__fork (void) 179__fork (void)
179{ 180{
@@ -354,7 +355,8 @@ PSEUDO_END (syscall)</code></pre>
354 <li>gcc 技术大全</li> 355 <li>gcc 技术大全</li>
355 <li>黑客调试技术大全</li> 356 <li>黑客调试技术大全</li>
356 </ul> 357 </ul>
357 <script src="https://test.qin-juan-ge-zhu.top/common/js/comment.js"></script> 358 <p class="time">2024.8</p>
359 <script src="https://www.qin-juan-ge-zhu.top/common/js/comment.js"></script>
358 </div> 360 </div>
359 </div> 361 </div>
360</body> 362</body>
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