Debugging Techniques


	Debugging Techniques

markhereld

12-10-2007 6:22 PM

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tags:

debugging, code, tools, software, trace

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/b9a24622-f8e0-48a3-bd7d-86c16e18bb8c/3A8ACC7D-B395-4A5E-AD4B-FD8AAEDA07A1/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://t-a-w.blogspot.com/2007/03/how-to-code-debuggers.html" href="http://t-a-w.blogspot.com/2007/03/how-to-code-debuggers.html" style="font-size: 11px;">t-a-w.blogspot.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://t-a-w.blogspot.com/2007/03/how-to-code-debuggers.html"><H3 class="post-title">
<A href="http://t-a-w.blogspot.com/2007/03/how-to-code-debuggers.html">How to code debuggers</A>
</H3></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://t-a-w.blogspot.com/2007/03/how-to-code-debuggers.html"><UL><li style="margin-left:16px;padding-left: 0px;">System call <CODE>ptrace</CODE> lets processes control other processes.</LI><li style="margin-left:16px;padding-left: 0px;">Binaries in ELF format include a lot of useful information.</LI><li style="margin-left:16px;padding-left: 0px;">Calls to library functions get resolved only when the program runs. It's very easy to make them point to our functions instead.</LI><li style="margin-left:16px;padding-left: 0px;">Compilers emit a lot of useful debugging information in DWARF format.</LI><li style="margin-left:16px;padding-left: 0px;"><CODE>/proc/</CODE> contains a lot of information about running programs.</LI></UL></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/3A8ACC7D-B395-4A5E-AD4B-FD8AAEDA07A1/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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