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| <title>µ¿Àû°øÀ¯°´Ã¼ (DSO) Áö¿ø - Apache HTTP Server</title> |
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| <p class="menu"><a href="./mod/">¸ðµâ</a> | <a href="./mod/directives.html">Áö½Ã¾îµé</a> | <a href="./faq/">FAQ</a> | <a href="./glossary.html">¿ë¾î</a> | <a href="./sitemap.html">»çÀÌÆ®¸Ê</a></p> |
| <p class="apache">Apache HTTP Server Version 2.1</p> |
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| <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="./">Version 2.1</a></div><div id="page-content"><div id="preamble"><h1>µ¿Àû°øÀ¯°´Ã¼ (DSO) Áö¿ø</h1> |
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| <p>¾ÆÆÄÄ¡ À¥¼¹ö´Â °ü¸®ÀÚ°¡ ¸ðµâµéÀ» ¼±ÅÃÇÏ¿© ¼¹ö¿¡ Æ÷ÇÔÇÒ |
| ±â´ÉÀ» °áÁ¤ÇÒ ¼ö ÀÖ´Â ¸ðµâÈµÈ ÇÁ·Î±×·¥ÀÌ´Ù. ¼¹ö¸¦ ÄÄÆÄÇÒ¶§ |
| <code>httpd</code> ½ÇÇàÆÄÀÏ¿¡ Á¤ÀûÀ¸·Î ¸ðµâÀ» ÄÄÆÄÀÏÇÒ |
| ¼ö ÀÖ´Ù. ¾Æ´Ï¸é ¸ðµâÀ» <code>httpd</code> ½ÇÇàÆÄÀÏ°ú |
| ºÐ¸®ÇÏ¿© µ¿Àû°øÀ¯°´Ã¼(Dynamic Shared Objects, DSO)·Î ÄÄÆÄÀÏÇÒ |
| ¼ö ÀÖ´Ù. DSO ¸ðµâÀº ¼¹ö¸¦ ÄÄÆÄÀÏÇÒ¶§ ÄÄÆÄÀÏÇϰųª, Apache |
| Extension Tool (<a href="programs/apxs.html">apxs</a>)À» |
| »ç¿ëÇÏ¿© ³ªÁß¿¡ ÄÄÆÄÀÏÇÏ¿© Ãß°¡ÇÒ ¼ö ÀÖ´Ù.</p> |
| |
| <p>ÀÌ ¹®¼´Â DSO ¸ðµâ »ç¿ë¹ý°ú ¹è°æ ÀÌ·ÐÀ» ¼³¸íÇÑ´Ù.</p> |
| </div> |
| <div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#implementation">±¸Çö</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#usage">»ç¿ë¹ý ¿ä¾à</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#background">¹è°æÁö½Ä</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#advantages">Àå´ÜÁ¡</a></li> |
| </ul></div> |
| <div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="implementation" id="implementation">±¸Çö</a></h2> |
| |
| <table class="related"><tr><th>°ü·ÃµÈ ¸ðµâ</th><th>°ü·ÃµÈ Áö½Ã¾î</th></tr><tr><td><ul><li><code class="module"><a href="./mod/mod_so.html">mod_so</a></code></li></ul></td><td><ul><li><code class="directive"><a href="./mod/mod_so.html#loadmodule">LoadModule</a></code></li></ul></td></tr></table> |
| |
| <p>¾ÆÆÄÄ¡ Çٽɿ¡ Á¤ÀûÀ¸·Î ÄÄÆÄÀÏÇؾßÇÒ |
| <code class="module"><a href="./mod/mod_so.c.html">mod_so.c</a></code>¶ó´Â ¸ðµâÀº ¾ÆÆÄÄ¡ ¸ðµâÀ» |
| ÀоîµéÀ̱âÀ§ÇÑ DSO¸¦ Áö¿øÇÑ´Ù. |
| ÀÌ ¸ðµâÀº <code class="module"><a href="./mod/core.html">core</a></code>¸¦ Á¦¿ÜÇÏ°í DSO°¡ |
| µÉ ¼ö ¾ø´Â À¯ÀÏÇÑ ¸ðµâÀÌ´Ù. ½ÇÁ¦·Î ´Ù¸¥ ¸ðµç ¾ÆÆÄÄ¡ ¸ðµâÀº |
| <a href="install.html">¼³Ä¡ ¹®¼</a>¿¡¼ ¼³¸íÇÑ |
| <code>configure</code>ÀÇ <code>--enable-<em>module</em>=shared</code> |
| ¿É¼ÇÀ» »ç¿ëÇÏ¿© DSO·Î ÄÄÆÄÀÏÇÒ ¼ö ÀÖ´Ù. ¸ðµâÀ» |
| <code>mod_foo.so</code>¿Í °°ÀÌ DSO·Î ÄÄÆÄÀÏÇÑÈÄ <code>httpd.conf</code> |
| ÆÄÀÏ¿¡ <code class="module"><a href="./mod/mod_so.html">mod_so</a></code>ÀÇ |
| <code class="directive"><a href="./mod/mod_so.html#loadmodule">LoadModule</a></code> ¸í·É¾î¸¦ |
| »ç¿ëÇÏ¿© ¼¹ö ½ÃÀ۽à ȤÀº Àç½ÃÀ۽à ±× ¸ðµâÀ» ÀоîµéÀÏ ¼ö |
| ÀÖ´Ù.</p> |
| |
| <p>¾ÆÆÄÄ¡ ¸ðµâ(ƯÈ÷ Á¦»ïÀÚ°¡ ¸¸µç ¸ðµâ)·Î »ç¿ëÇÒ DSO ÆÄÀÏÀ» ½±°Ô |
| ¸¸µé±âÀ§ÇØ <a href="programs/apxs.html">apxs</a> (<em>APache |
| eXtenSion</em>)¶ó´Â »õ·Î¿î Áö¿ø ÇÁ·Î±×·¥ÀÌ ÀÖ´Ù. ÀÌ ÇÁ·Î±×·¥Àº |
| ¾ÆÆÄÄ¡ ¼Ò½º Æ®¸® <em>¹Û¿¡¼</em> DSO·Î »ç¿ëÇÒ ¸ðµâÀ» |
| ÄÄÆÄÀÏÇÒ¶§ »ç¿ëÇÑ´Ù. °³³äÀº ½±´Ù. ¾ÆÆÄÄ¡¸¦ ¼³Ä¡ÇÒ¶§ |
| <code>configure</code>¿Í <code>make install</code>ÀÌ |
| ¾ÆÆÄÄ¡ C Çì´õÆÄÀÏÀ» ¼³Ä¡ÇÏ°í, DSO ÆÄÀÏÀ» ÄÄÆÄÀÏÇϱâÀ§ÇÑ |
| Ç÷¡Æû ƯÀ¯ÀÇ ÄÄÆÄÀÏ·¯ ¿É¼Ç°ú ¸µÄ¿ ¿É¼ÇÀ» <code>apxs</code> |
| ÇÁ·Î±×·¥¿¡ ±â·ÏÇÑ´Ù. ±×·¡¼ <code>apxs</code>¸¦ »ç¿ëÇÏ´Â »ç¿ëÀÚ´Â |
| ¾ÆÆÄÄ¡ ¹èÆ÷º» ¼Ò½º Æ®¸®¾øÀÌ, ¶Ç DSO Áö¿øÀ» À§ÇÑ Ç÷¡Æû ƯÀ¯ÀÇ |
| ÄÄÆÄÀÏ·¯ ¿É¼Ç¿Í ¸µÄ¿ ¿É¼Ç¿¡ ½Å°æÀ» ¾²Áö¾Ê°í ÀÚ½ÅÀÇ ¾ÆÆÄÄ¡ |
| ¸ðµâ ¼Ò½º¸¦ ÄÄÆÄÀÏÇÒ ¼ö ÀÖ´Ù.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="usage" id="usage">»ç¿ë¹ý ¿ä¾à</a></h2> |
| |
| <p>Apache 2.0ÀÇ DSO ±â´É¿¡ ´ëÇÑ Âª°í °£·«ÇÑ ¿ä¾àÀÌ´Ù:</p> |
| |
| <ol> |
| <li> |
| <em>¹èÆ÷º»¿¡ ÀÖ´Â</em> ¾ÆÆÄÄ¡ ¸ðµâÀ» ÄÄÆÄÀÏÇÏ°í ¼³Ä¡ÇÏ´Â |
| °æ¿ì. ¿¹¸¦ µé¾î <code>mod_foo.c</code>¸¦ DSO |
| <code>mod_foo.so</code>·Î: |
| |
| <div class="example"><p><code> |
| $ ./configure --prefix=/path/to/install --enable-foo=shared<br /> |
| $ make install |
| </code></p></div> |
| </li> |
| |
| <li> |
| <em>Á¦»ïÀÚ°¡ ¸¸µç</em> ¾ÆÆÄÄ¡ ¸ðµâÀ» ÄÄÆÄÀÏÇÏ°í ¼³Ä¡ÇÏ´Â |
| °æ¿ì. ¿¹¸¦ µé¾î <code>mod_foo.c</code>¸¦ DSO |
| <code>mod_foo.so</code>·Î: |
| |
| <div class="example"><p><code> |
| $ ./configure --add-module=module_type:/path/to/3rdparty/mod_foo.c --enable-foo=shared<br /> |
| $ make install |
| </code></p></div> |
| </li> |
| |
| <li> |
| °øÀ¯ ¸ðµâÀ» <em>³ªÁß¿¡ »ç¿ëÇϱâÀ§ÇØ</em> ¾ÆÆÄÄ¡¸¦ ±¸¼ºÇÏ´Â |
| °æ¿ì: |
| |
| <div class="example"><p><code> |
| $ ./configure --enable-so<br /> |
| $ make install |
| </code></p></div> |
| </li> |
| |
| <li> |
| <em>Á¦»ïÀÚ°¡ ¸¸µç</em> ¾ÆÆÄÄ¡ ¸ðµâÀ» ÄÄÆÄÀÏÇÏ°í ¼³Ä¡ÇÏ´Â |
| °æ¿ì. <a href="programs/apxs.html">apxs</a>¸¦ »ç¿ëÇÏ¿© |
| ¾ÆÆÄÄ¡ ¼Ò½º Æ®¸® <em>¹Û¿¡¼</em> <code>mod_foo.c</code>¸¦ |
| DSO <code>mod_foo.so</code>·Î: |
| |
| <div class="example"><p><code> |
| $ cd /path/to/3rdparty<br /> |
| $ apxs -c mod_foo.c<br /> |
| $ apxs -i -a -n foo mod_foo.la |
| </code></p></div> |
| </li> |
| </ol> |
| |
| <p>¸ðµç °æ¿ì ÀÏ´Ü °øÀ¯ ¸ðµâÀÌ ÄÄÆÄÀϵǸé, <code>httpd.conf</code>¿¡ |
| <code class="directive"><a href="./mod/mod_so.html#loadmodule">LoadModule</a></code> Áö½Ã¾î¸¦ |
| »ç¿ëÇÏ¿© ¾ÆÆÄÄ¡°¡ ±× ¸ðµâÀ» ÀоîµéÀÌ°Ô ¸¸µç´Ù.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="background" id="background">¹è°æÁö½Ä</a></h2> |
| |
| <p>Çö´ëÀûÀÎ À¯´Ð½º·ù¿¡´Â <em>µ¿Àû°øÀ¯°´Ã¼</em> (DSO)ÀÇ |
| µ¿Àû ¸µÅ·/·Îµù(dynamic linking/loading)À̶ó°í ÇÏ¿©, Ưº°ÇÑ |
| Çü½ÄÀÇ ½ÇÇàÄÚµå Á¶°¢À» ¸¸µé¾î ½ÇÇàÁßÀÎ ½ÇÇàÇÁ·Î±×·¥ÀÇ |
| ÁÖ¼Ò°ø°£¿¡ ÀоîµéÀÌ´Â ¸ÚÁø ±â´ÉÀÌ ÀÖ´Ù.</p> |
| |
| <p>º¸Åë µÎ°¡Áö ¹æ¹ýÀ¸·Î ÀоîµéÀÏ ¼ö ÀÖ´Ù. Çϳª´Â ½ÇÇàÇÁ·Î±×·¥ÀÌ |
| ½ÃÀÛÇÒ¶§ <code>ld.so</code>¶ó´Â ½Ã½ºÅÛ ÇÁ·Î±×·¥ÀÌ ÀÚµ¿À¸·Î |
| ÀоîµéÀÌ´Â °æ¿ì°í, ´Ù¸¥ Çϳª´Â ½ÇÇàÁßÀÎ ÇÁ·Î±×·¥ÀÌ |
| <code>dlopen()/dlsym()</code> ½Ã½ºÅÛÈ£Ãâ·Î À¯´Ð½º ·Î´õ(loader)ÀÇ |
| ½Ã½ºÅÛ ÀÎÅÍÆäÀ̽ºÀ» »ç¿ëÇÏ¿© Á÷Á¢ ÀоîµéÀÌ´Â °æ¿ì´Ù.</p> |
| |
| <p>ù¹ø° °æ¿ì DSO¸¦ º¸Åë <em>°øÀ¯¶óÀ̺귯¸®(shared libraries)</em> |
| ȤÀº <em>DSO ¶óÀ̺귯¸®</em>¶ó°í ºÎ¸£¸ç, ÆÄÀÏÀº |
| <code>libfoo.so</code>³ª <code>libfoo.so.1.2</code> °°Àº |
| À̸§À» °¡Áø´Ù. À̵éÀº ½Ã½ºÅÛ µð·ºÅ丮(º¸Åë <code>/usr/lib</code>)¿¡ |
| ÀÖ°í, ÄÄÆÄÀϽà ¸µÄ¿ ¸í·É¾î¿¡ <code>-lfoo</code>¸¦ ÁÖ¾î |
| ½ÇÇàÆÄÀÏ°ú ¿¬°áÇÑ´Ù. ÀÌ·¸°Ô Á÷Á¢ ½áÁØ ¶óÀ̺귯¸®´Â ½ÇÇàÆÄÀÏ¿¡ |
| ÂüÁ¶µÇ¿©¼, ÇÁ·Î±×·¥ÀÌ ½ÃÀÛÇÒ¶§ ¸µÄ¿ ¿É¼Ç <code>-R</code>·Î |
| Á÷Á¢ ÁöÁ¤ÇÑ °æ·Î, ȯ°æº¯¼ö <code>LD_LIBRARY_PATH</code>·Î |
| ÁöÁ¤ÇÑ °æ·Î ȤÀº <code>/usr/lib</code>¿¡¼ À¯´Ð½º ·Î´õ°¡ |
| <code>libfoo.so</code>¸¦ ãÀ» ¼ö ÀÖ´Ù. ±×·¯¸é ½ÇÇàÇÁ·Î±×·¥ÀÇ |
| (¾ÆÁ÷ ¸øãÀº(unresolved)) ½Éº¼(symbol)À» DSO¿¡¼ ã°ÔµÈ´Ù.</p> |
| |
| <p>DSO´Â º¸Åë ½ÇÇàÇÁ·Î±×·¥ÀÇ ½Éº¼À» ãÁö¾Ê±â ¶§¹®¿¡ (DSO°¡ |
| Àç»ç¿ë°¡´ÉÇÑ ÀϹÝÀûÀÎ ÄÚµå ¶óÀ̺귯¸®À̹ǷÎ) ã±â´Â ¿©±â¼ |
| ³¡³´Ù. À¯´Ð½º ·Î´õ°¡ ½Éº¼ ã±â¸¦ ¿ÏÀüÈ÷ ´ã´çÇϹǷΠ½ÇÇàÇÁ·Î±×·¥ÀÌ |
| Á÷Á¢ DSO¿¡¼ ½Éº¼À» ãÀ» ÇÊ¿ä°¡ ¾ø´Ù. (»ç½Ç <code>ld.so</code>¸¦ |
| ºÎ¸£´Â ÄÚµå´Â Á¤ÀûÀÌ ¾Æ´Ñ ¸ðµç ½ÇÇàÇÁ·Î±×·¥¿¡ ¸µÅ©µÇ´Â ½ÇÇà½Ã |
| ½ÃÀÛÄÚµåÀÇ ÀϺδÙ.) °øÅëµÈ ¶óÀ̺귯¸® Äڵ带 µ¿ÀûÀ¸·Î ÀоîµéÀÌ´Â |
| ÀåÁ¡Àº ¸íÈ®ÇÏ´Ù. ¶óÀ̺귯¸® Äڵ尡 ¸ðµç ÇÁ·Î±×·¥¿¡ Áߺ¹Çؼ |
| ÀúÀåµÇ´Â ´ë½Å <code>libc.so</code>¿Í °°Àº ½Ã½ºÅÛ ¶óÀ̺귯¸®¿¡ |
| Çѹø¸¸ ÀúÀåµÇ±â ¶§¹®¿¡ µð½ºÅ© °ø°£ÀÌ Àý¾àµÈ´Ù.</p> |
| |
| <p>µÎ¹ø° °æ¿ì DSO¸¦ º¸Åë <em>°øÀ¯°´Ã¼(shared objects)</em> |
| ȤÀº <em>DSO ÆÄÀÏ</em>À̶ó°í ºÎ¸£°í, (±ÔÄ¢»ó À̸§Àº |
| <code>foo.so</code>ÀÌÁö¸¸) ÆÄÀÏÀÇ È®ÀåÀÚ´Â ÀÚÀ¯·Ó´Ù. ÀÌ |
| ÆÄÀϵéÀº º¸Åë ÇÁ·Î±×·¥ ÀÚü µð·ºÅ丮¿¡ À§Ä¡ÇÏ°í ½ÇÇàÇÁ·Î±×·¥¿¡ |
| ÀÚµ¿À¸·Î ¿¬°áµÇÁö ¾Ê´Â´Ù. ´ë½Å ½ÇÇàÇÁ·Î±×·¥Àº ½ÇÇà½Ã |
| <code>dlopen()</code>À» »ç¿ëÇÏ¿© DSO¸¦ ÁÖ¼Ò°ø°£¿¡ |
| Á÷Á¢ Àоîµé¿©¾ß ÇÑ´Ù. À̶§ ½ÇÇàÇÁ·Î±×·¥Àº DSO¿¡¼ ½Éº¼À» |
| ãÁö ¾Ê´Â´Ù. ´ë½Å ¾Õ¿¡¼ º» À¯´Ð½º ·Î´õ´Â ÀÚµ¿À¸·Î ½ÇÇàÆÄÀÏ°ú |
| ½ÇÇàÆÄÀÏÀÌ ÀÌ¹Ì ÀоîµéÀÎ DSO ¶óÀ̺귯¸®(ƯÈ÷ Ç×»ó Á¸ÀçÇÏ´Â |
| <code>libc.so</code>ÀÇ ¸ðµç ½Éº¼)¿¡¼ DSOÀÇ (¾ÆÁ÷ ¸øãÀº) |
| ½Éº¼À» ã´Â´Ù. ±×·¡¼ DSO´Â ¸¶Ä¡ óÀ½ºÎÅÍ ½ÇÇàÇÁ·Î±×·¥¿¡ |
| Á¤ÀûÀ¸·Î ¸µÅ©µÈ°Í°ú °°ÀÌ ½ÇÇàÆÄÀÏÀÇ ½Éº¼À» ¾Ë°ÔµÈ´Ù.</p> |
| |
| <p>DSOÀÇ API¸¦ ÀÌ¿ëÇϱâÀ§Çؼ ¸¶Áö¸·À¸·Î ½ÇÇàÇÁ·Î±×·¥Àº |
| <code>dlsym()</code>À¸·Î DSO¿¡¼ ƯÁ¤ ½Éº¼À» ã¾Æ¼, ¾ÕÀ¸·Î |
| »ç¿ëÇϱâÀ§ÇØ µð½ºÆÐÄ¡(dispatch) Ç¥ <em>µî</em>¿¡ ÀúÀåÇÑ´Ù. |
| ´Ù¸¥ ¸»·Î ½ÇÇàÇÁ·Î±×·¥Àº »ç¿ëÇÒ ¸ðµç ½Çº¼À» Á÷Á¢ ã¾Æ¾ßÇÑ´Ù. |
| ÀÌ·± ±¸Á¶ÀÇ ÀåÁ¡Àº ÇÁ·Î±×·¥ÀÇ ÀϺθ¦ ÇÁ·Î±×·¥ÀÌ |
| ÇÊ¿äÇÒ¶§±îÁö ÀоîµéÀÌÁö ¾Ê¾Æµµ (±×·¡¼ ¸Þ¸ð¸®¸¦ ³¶ºñÇÏÁö |
| ¾Ê°Ô) µÈ´Ù´Â Á¡ÀÌ´Ù. ±âº» ÇÁ·Î±×·¥ÀÇ ±â´ÉÀ» È®ÀåÇϱâÀ§ÇØ |
| ÇÊ¿äÇÑ °æ¿ì ÀÌ ºÎºÐÀ» µ¿ÀûÀ¸·Î ÀоîµéÀÏ ¼ö ÀÖ´Ù.</p> |
| |
| <p>ÀÌ·± DSO ±¸Á¶°¡ ÀÚ¿¬½º·´°Ô º¸ÀÌÁö¸¸, ÃÖ¼ÒÇÑ ¾î·Á¿î Á¡ÀÌ |
| ÇÑ°¡ÁöÀÖ´Ù. ÇÁ·Î±×·¥À» È®ÀåÇϱâÀ§ÇØ DSO¸¦ »ç¿ëÇÒ¶§ DSO°¡ |
| ½ÇÇàÇÁ·Î±×·¥ÀÇ ½Éº¼À» ã´Â ÀÏÀÌ´Ù. ¿Ö? DSO°¡ ½ÇÇàÇÁ·Î±×·¥ÀÇ |
| ½Éº¼À» "¿ªÀ¸·Î ã´Â °Í"Àº (¶óÀ̺귯¸®´Â ÀÚ½ÅÀ» »ç¿ëÇÏ´Â ÇÁ·Î±×·¥¿¡ |
| ´ëÇØ ¸ð¸¥´Ù´Â) ¶óÀ̺귯¸® ¼³°è¿¡ ¹ÝÇϸç, ¸ðµç Ç÷¡Æû¿¡¼ |
| Áö¿øµÇÁö¾Ê°í Ç¥ÁØȵÇÁöµµ ¾Ê¾Ò±â ¶§¹®ÀÌ´Ù. ½ÇÁ¦·Î ½ÇÇàÆÄÀÏÀÇ |
| Àü¿ª½Éº¼(global symbol)Àº º¸Åë ÀͽºÆ÷Æ®(export)µÇÁö ¾Ê±â¶§¹®¿¡ |
| DSO°¡ »ç¿ëÇÒ ¼ö ¾ø´Ù. DSO¸¦ »ç¿ëÇÏ¿© ½ÇÇàÁß ÇÁ·Î±×·¥À» È®ÀåÇÏ·Á¸é |
| ¸µÄ¿¿¡°Ô ¸ðµç Àü¿ª½Éº¼À» ÀͽºÆ÷Æ®Çϵµ·Ï °Á¦ÇÏ´Â °ÍÀÌ ÁÖµÈ |
| ÇØ°áÃ¥ÀÌ´Ù.</p> |
| |
| <p>°øÀ¯¶óÀ̺귯¸®´Â DSO ¹æ½ÄÀÇ ¼³°è¿øÄ¢´ë·Î ÀüÇüÀûÀ̱⶧¹®¿¡ |
| ¿î¿µÃ¼Á¦°¡ Á¦°øÇÏ´Â °ÅÀÇ ¸ðµç Á¾·ùÀÇ ¶óÀ̺귯¸®°¡ »ç¿ëÇÑ´Ù. |
| ¹Ý´ë·Î ¸¹Àº ÇÁ·Î±×·¥Àº ÇÁ·Î±×·¥À» È®ÀåÇϱâÀ§ÇØ °øÀ¯°´Ã¼¸¦ |
| »ç¿ëÇÏÁö ¾Ê´Â´Ù.</p> |
| |
| <p>1998³â ½ÇÇàÁß ½ÇÁ¦·Î ±â´ÉÀ» È®ÀåÇϱâÀ§ÇØ DSO ±¸Á¶¸¦ »ç¿ëÇÑ |
| ¼ÒÇÁÆ®¿þ¾î ÆÐÅ°Áö´Â (XS ±¸Á¶¿Í DynaLoader ¸ðµâÀ» »ç¿ëÇÑ) |
| Perl 5, Netscape Server <em>µî</em>À¸·Î µå¹°¾ú´Ù. ¾ÆÆÄÄ¡´Â |
| ÀÌ¹Ì ±â´ÉÀ» È®ÀåÇϱâÀ§ÇØ ¸ðµâ °³³äÀ» »ç¿ëÇß°í ¿ÜºÎ ¸ðµâÀ» |
| ¾ÆÆÄÄ¡ Çٽɱâ´É¿¡ ¿¬°áÇϱâÀ§ÇØ ³»ºÎÀûÀ¸·Î µð½ºÆÐÄ¡¸ñ·ÏÀ» |
| ÀÌ¿ëÇÑ Á¢±Ù¹æ¹ýÀ» »ç¿ëÇ߱⶧¹®¿¡ 1.3 ¹öÀüºÎÅÍ ÀÌ ´ë¿¿¡ ÇÕ·ùÇß´Ù. |
| ±×·¡¼ ¾ÆÆÄÄ¡´Â ½ÇÇàÁß ¸ðµâÀ» ÀоîµéÀ̴µ¥ DSO¸¦ »ç¿ëÇϵµ·Ï |
| ¿î¸íÁö¿öÁ³´Ù.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="advantages" id="advantages">Àå´ÜÁ¡</a></h2> |
| |
| <p>¾Õ¿¡¼ ¸»ÇÑ DSO¸¦ »ç¿ëÇÏ¸é ´ÙÀ½°ú °°Àº ÀåÁ¡ÀÌ ÀÖ´Ù:</p> |
| |
| <ul> |
| <li>½ÇÁ¦ ¼¹ö ÇÁ·Î¼¼½º°¡ ÄÄÆÄÀϽà <code>configure</code> |
| ¿É¼Ç´ë½Å <code>httpd.conf</code>ÀÇ <code class="directive"><a href="./mod/mod_so.html#loadmodule">LoadModule</a></code>À» »ç¿ëÇÏ¿© ½ÇÇàÁß¿¡ |
| °áÇյǹǷΠ¼¹ö ÆÐÅ°Áö ½ÇÇàÀÌ ´õ À¯¿¬ÇÏ´Ù. ¿¹¸¦ µé¾î ÇѹøÀÇ |
| ¾ÆÆÄÄ¡ ¼³Ä¡¸¸À¸·Î ´Ù¸¥ ¼¹ö(Ç¥ÁØ ¹öÀü°ú SSL ¹öÀü, ÃÖ¼ÒÈ |
| ¹öÀü°ú ±â´ÉÃß°¡ ¹öÀü [mod_perl, PHP3] <em>µî</em>)¸¦ ½ÇÇàÇÒ |
| ¼ö ÀÖ´Ù.</li> |
| |
| <li>¼¹ö´Â ¼³Ä¡ÈÄ¿¡µµ Á¦»ïÀÚ°¡ ¸¸µç ¸ðµâÀ» »ç¿ëÇÏ¿© ½±°Ô |
| È®ÀåÇÒ ¼ö ÀÖ´Ù. ÃÖ¼ÒÇÑ ±â¾÷ÀÇ ÆÐÅ°Áö Á¦ÀÛÀÚ´Â ¾ÆÆÄÄ¡ ÇÙ½É |
| ÆÐÅ°Áö¿Í º°µµ·Î PHP3, mod_perl, mod_fastcgi <em>µî</em>À» |
| Ãß°¡ ÆÐÅ°Áö·Î ¸¸µé ¼ö ÀÖ¾î¼ Å« À̵æÀÌ´Ù.</li> |
| |
| <li>DSO¿Í <code>apxs</code>¸¦ °¡Áö°í ¾ÆÆÄÄ¡ ¼Ò½º Æ®¸® ¹Û¿¡¼ |
| ÀÛ¾÷ÇÏ°í <code>apxs -i</code>¿Í <code>apachectl restart</code> |
| ¸í·É¾î¸¸À¸·Î ÇöÀç °³¹ßÇÑ ¸ðµâÀÇ »õ ¹öÀüÀ» ½ÇÇàÁßÀÎ ¾ÆÆÄÄ¡ |
| ¼¹ö¿¡ ¹Ý¿µÇÒ ¼ö ÀÖ¾î¼ ´õ ½±°Ô ¾ÆÆÄÄ¡ ¸ðµâÀ» °³¹ßÇÒ ¼ö |
| ÀÖ´Ù.</li> |
| </ul> |
| |
| <p>DSO´Â ´ÙÀ½°ú °°Àº ´ÜÁ¡ÀÌ ÀÖ´Ù:</p> |
| |
| <ul> |
| <li>ÇÁ·Î±×·¥ÀÇ ÁÖ¼Ò°ø°£¿¡ Äڵ带 µ¿ÀûÀ¸·Î ÀоîµéÀÌ´Â ±â´ÉÀ» |
| Áö¿øÇÏÁö¾Ê´Â ¿î¿µÃ¼Á¦°¡ Àֱ⠶§¹®¿¡ ¸ðµç Ç÷¡Æû¿¡¼ DSO¸¦ |
| »ç¿ëÇÒ ¼ö ¾ø´Ù.</li> |
| |
| <li>À¯´Ð½º ·Î´õ°¡ ½Éº¼À» ã¾Æ¾ßÇϱ⠶§¹®¿¡ ¼¹ö ½ÃÀÛÀÌ |
| ¾à 20% Á¤µµ ´Ê¾îÁø´Ù.</li> |
| |
| <li>¼¹ö´Â À§Ä¡µ¶¸³ÄÚµå(position independent code, PIC) |
| ¶§¹®¿¡ Àý´ëÁÖ¼ÒÁöÁ¤(absolute addressing)º¸´Ù ´À¸° |
| »ó´ëÁÖ¼ÒÁöÁ¤(relative addressing)ÀÇ º¹ÀâÇÑ ¾î¼Àºí·¯ ±â¹ýÀÌ |
| ÇÊ¿äÇϹǷΠ¾î¶² Ç÷¡Æû¿¡¼ ½ÇÇà½Ã ¾à 5% Á¤µµ ´Ê´Ù.</li> |
| |
| <li>DSO ¸ðµâÀ» ´Ù¸¥ DSO±â¹Ý ¶óÀ̺귯¸®(<code>ld -lfoo</code>)¿¡ |
| ¸µÅ©ÇÒ ¼ö ¾ø´Â Ç÷¡ÆûÀÌ Àֱ⶧¹®¿¡ (¿¹¸¦ µé¾î ELF±â¹Ý |
| Ç÷¡ÆûÀº Áö¿øÇÏÁö¸¸ a.out±â¹Ý Ç÷¡ÆûÀº º¸Åë ÀÌ ±â´ÉÀ» |
| Áö¿øÇÏÁö ¾Ê´Â´Ù) ¸ðµç Á¾·ùÀÇ ¸ðµâ¿¡ DSO¸¦ »ç¿ëÇÒ ¼ö ¾ø´Ù. |
| ´Ù¸¥ ¸»·Î DSO ÆÄÀÏ·Î ÄÄÆÄÀÏÇÏ´Â ¸ðµâÀº ¾ÆÆÄÄ¡ Çٽɰú ¾ÆÆÄÄ¡ |
| ÇÙ½ÉÀÌ »ç¿ëÇÏ´Â C ¶óÀ̺귯¸®(<code>libc</code>)¿Í ´Ù¸¥ |
| µ¿Àû/Á¤Àû ¶óÀ̺귯¸®, À§Ä¡µ¶¸³Äڵ带 ´ã°í ÀÖ´Â Á¤Àû ¶óÀ̺귯¸® |
| ¾ÆÄ«À̺ê(<code>libfoo.a</code>)ÀÇ ½Éº¼¸¸À» »ç¿ëÇÒ ¼ö ÀÖ´Ù. |
| ´Ù¸¥ Äڵ带 »ç¿ëÇÏ·Á¸é ¾ÆÆÄÄ¡ ÇÙ½ÉÀÌ ±×°ÍÀ» ÂüÁ¶ÇÏ´øÁö, |
| <code>dlopen()</code>À¸·Î Á÷Á¢ Äڵ带 Àоîµé¿©¾ß ÇÑ´Ù.</li> |
| </ul> |
| |
| </div></div> |
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