blog/content/post/2008/01/26/2008-01-26-00000770.md

---
title: svchost.exe の謎がついに解けた！
author: kazu634
date: 2008-01-26
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categories:
  - diary

---
<div class="section">
<p>
    　Windowsのサービス一覧を覗くと、「svchost.exe」というのが並んでいる。こいつは何なのかいつも疑問であった。この疑問がついに解けた。<a href="http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/" onclick="__gaTracker('send', 'event', 'outbound-article', 'http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/', 'What is svchost.exe And Why Is It Running? :: the How-To Geek');" target="_blank">What is svchost.exe And Why Is It Running? :: the How-To Geek</a>のおかげだ。
</p>
  
<h4>
    要するに何なのよ？
</h4>
  
<blockquote title="What is svchost.exe And Why Is It Running? " cite="http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/">
<p>
      Some time ago, Microsoft started moving all of the functionality from internal Windows services into .dll files instead of .exe files. From a programming perspective this makes more sense for reusability… but the problem is that you can&#8217;t launch a .dll file directly from Windows, it has to be loaded up from a running executable (.exe). Thus the svchost.exe process was born.
</p>
    
<p>
<cite><a href="http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/" onclick="__gaTracker('send', 'event', 'outbound-article', 'http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/', 'What is svchost.exe And Why Is It Running? :: the How-To Geek');" target="_blank">What is svchost.exe And Why Is It Running? :: the How-To Geek</a></cite>
</p>
</blockquote>
  
<p>
    要するに、実行形式(exeファイル)と汎用性のあるライブラリー(dllファイル)を分けようとした結果、ライブラリーを呼び出すためだけの実行形式ファイルが必要になったようだ。
</p>
  
<h4>
    じゃあ何でこんなにたくさんsvchost.exeが起動しているの？
</h4>
  
<blockquote title="What is svchost.exe And Why Is It Running? " cite="http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/">
<p>
      If you&#8217;ve ever taken a look at the Services section in control panel you might notice that there are a Lot of services required by Windows. If every single service ran under a single svchost.exe instance, a failure in one might bring down all of Windows… so they are separated out.
</p>
    
<p>
<cite><a href="http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/" onclick="__gaTracker('send', 'event', 'outbound-article', 'http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/', 'What is svchost.exe And Why Is It Running? :: the How-To Geek');" target="_blank">What is svchost.exe And Why Is It Running? :: the How-To Geek</a></cite>
</p>
</blockquote>
  
<p>
    svchost.exeひとつだけにライブラリーの読み込みを任せていたら、仮にそのsvchost.exeがうまく動かなくなってしまうとみんな道連れになるからだよ！
</p>
</div>