add directory Ref-docs
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Ref-docs/manual gdb/gdbint/gdbint_1.html
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Ref-docs/manual gdb/gdbint/gdbint_1.html
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<HTML>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<!-- Created on October, 18 2002 by texi2html 1.64 -->
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<!--
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Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
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Karl Berry <karl@freefriends.org>
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Olaf Bachmann <obachman@mathematik.uni-kl.de>
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and many others.
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Maintained by: Olaf Bachmann <obachman@mathematik.uni-kl.de>
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Send bugs and suggestions to <texi2html@mathematik.uni-kl.de>
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-->
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<HEAD>
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<TITLE>GDB Internals: Requirements</TITLE>
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<META NAME="description" CONTENT="GDB Internals: Requirements">
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<META NAME="keywords" CONTENT="GDB Internals: Requirements">
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<META NAME="resource-type" CONTENT="document">
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<META NAME="distribution" CONTENT="global">
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<META NAME="Generator" CONTENT="texi2html 1.64">
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</HEAD>
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<BODY LANG="" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#800080" ALINK="#FF0000">
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<A NAME="SEC1"></A>
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<TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0>
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<TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint.html#SEC_Top"> < </A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_2.html#SEC2"> > </A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[ << ]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint.html#SEC_Top"> Up </A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_2.html#SEC2"> >> </A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint.html#SEC_Top">Top</A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_toc.html#SEC_Contents">Contents</A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_19.html#SEC186">Index</A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_abt.html#SEC_About"> ? </A>]</TD>
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</TR></TABLE>
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<A NAME="Requirements"></A>
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</P><P>
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<H1> 1. Requirements </H1>
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<!--docid::SEC1::-->
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<P>
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Before diving into the internals, you should understand the formal
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requirements and other expectations for GDB. Although some
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of these may seem obvious, there have been proposals for GDB
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that have run counter to these requirements.
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</P><P>
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First of all, GDB is a debugger. It's not designed to be a
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front panel for embedded systems. It's not a text editor. It's not a
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shell. It's not a programming environment.
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</P><P>
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GDB is an interactive tool. Although a batch mode is
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available, GDB's primary role is to interact with a human
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programmer.
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</P><P>
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GDB should be responsive to the user. A programmer hot on
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the trail of a nasty bug, and operating under a looming deadline, is
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going to be very impatient of everything, including the response time
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to debugger commands.
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</P><P>
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GDB should be relatively permissive, such as for expressions.
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While the compiler should be picky (or have the option to be made
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picky), since source code lives for a long time usually, the
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programmer doing debugging shouldn't be spending time figuring out to
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mollify the debugger.
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</P><P>
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GDB will be called upon to deal with really large programs.
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Executable sizes of 50 to 100 megabytes occur regularly, and we've
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heard reports of programs approaching 1 gigabyte in size.
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</P><P>
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GDB should be able to run everywhere. No other debugger is
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available for even half as many configurations as GDB
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supports.
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</P><P>
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<A NAME="Overall Structure"></A>
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</P><P>
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<HR SIZE="6">
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<TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0>
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<TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[ << ]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_2.html#SEC2"> >> </A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint.html#SEC_Top">Top</A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_toc.html#SEC_Contents">Contents</A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_19.html#SEC186">Index</A>]</TD>
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<TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="gdbint_abt.html#SEC_About"> ? </A>]</TD>
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</TR></TABLE>
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<BR>
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<FONT SIZE="-1">
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<address>
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<p>Please send FSF & GNU inquiries & questions to <a
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href="mailto:gnu@gnu.org">gnu@gnu.org</a>. There are also <a
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href="http://www.gnu.org/home.html#ContactInfo">other ways to
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contact</a> the FSF.</p>
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<p>These pages are maintained by <a
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href="http://www.gnu.org/software/gdb/">the GDB developers</a>.</p>
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<p>Copyright Free Software Foundation, Inc., 59 Temple Place - Suite
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330, Boston, MA 02111, USA.</p>
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<p>Verbatim copying and distribution of this entire article is
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permitted in any medium, provided this notice is preserved.</p>
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</address>
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This document was generated
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by <I>GDB Administrator</I> on <I>October, 18 2002</I>
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using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html
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"><I>texi2html</I></A>
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</BODY>
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</HTML>
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