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<a name="Running-Programs-Under-GDB"></a>
<h2 class="chapter">4 Running Programs Under <small>GDB</small></h2>
<p>When you run a program under <small>GDB</small>, you must first generate
debugging information when you compile it.
</p>
<p>You may start <small>GDB</small> with its arguments, if any, in an environment
of your choice. If you are doing native debugging, you may redirect
your program&rsquo;s input and output, debug an already running process, or
kill a child process.
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<tr><td align="left" valign="top">&bull; <a href="Compilation.html#Compilation" accesskey="1">Compilation</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Compiling for debugging
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<tr><td align="left" valign="top">&bull; <a href="Starting.html#Starting" accesskey="2">Starting</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Starting your program
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<tr><td align="left" valign="top">&bull; <a href="Arguments.html#Arguments" accesskey="3">Arguments</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Your program&rsquo;s arguments
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<tr><td align="left" valign="top">&bull; <a href="Environment.html#Environment" accesskey="4">Environment</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Your program&rsquo;s environment
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</pre></th></tr><tr><td align="left" valign="top">&bull; <a href="Working-Directory.html#Working-Directory" accesskey="5">Working Directory</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Your program&rsquo;s working directory
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<tr><td align="left" valign="top">&bull; <a href="Input_002fOutput.html#Input_002fOutput" accesskey="6">Input/Output</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Your program&rsquo;s input and output
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<tr><td align="left" valign="top">&bull; <a href="Attach.html#Attach" accesskey="7">Attach</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Debugging an already-running process
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<tr><td align="left" valign="top">&bull; <a href="Kill-Process.html#Kill-Process" accesskey="8">Kill Process</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Killing the child process
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</pre></th></tr><tr><td align="left" valign="top">&bull; <a href="Inferiors-and-Programs.html#Inferiors-and-Programs" accesskey="9">Inferiors and Programs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Debugging multiple inferiors and programs
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<tr><td align="left" valign="top">&bull; <a href="Threads.html#Threads">Threads</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Debugging programs with multiple threads
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<tr><td align="left" valign="top">&bull; <a href="Forks.html#Forks">Forks</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Debugging forks
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<tr><td align="left" valign="top">&bull; <a href="Checkpoint_002fRestart.html#Checkpoint_002fRestart">Checkpoint/Restart</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Setting a <em>bookmark</em> to return to later
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