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<title>Stopping (Debugging with GDB)</title>

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<a name="Stopping"></a>
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Next: <a href="Reverse-Execution.html#Reverse-Execution" accesskey="n" rel="next">Reverse Execution</a>, Previous: <a href="Running.html#Running" accesskey="p" rel="prev">Running</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Stopping-and-Continuing"></a>
<h2 class="chapter">5 Stopping and Continuing</h2>

<p>The principal purposes of using a debugger are so that you can stop your
program before it terminates; or so that, if your program runs into
trouble, you can investigate and find out why.
</p>
<p>Inside <small>GDB</small>, your program may stop for any of several reasons,
such as a signal, a breakpoint, or reaching a new line after a
<small>GDB</small> command such as <code>step</code>.  You may then examine and
change variables, set new breakpoints or remove old ones, and then
continue execution.  Usually, the messages shown by <small>GDB</small> provide
ample explanation of the status of your program&mdash;but you can also
explicitly request this information at any time.
</p>
<dl compact="compact">
<dd><a name="index-info-program"></a>
</dd>
<dt><code>info program</code></dt>
<dd><p>Display information about the status of your program: whether it is
running or not, what process it is, and why it stopped.
</p></dd>
</dl>

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<tr><td align="left" valign="top">&bull; <a href="Breakpoints.html#Breakpoints" accesskey="1">Breakpoints</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Breakpoints, watchpoints, and catchpoints
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<tr><td align="left" valign="top">&bull; <a href="Continuing-and-Stepping.html#Continuing-and-Stepping" accesskey="2">Continuing and Stepping</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Resuming execution
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<tr><td align="left" valign="top">&bull; <a href="Skipping-Over-Functions-and-Files.html#Skipping-Over-Functions-and-Files" accesskey="3">Skipping Over Functions and Files</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
                                Skipping over functions and files
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<tr><td align="left" valign="top">&bull; <a href="Signals.html#Signals" accesskey="4">Signals</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Signals
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<tr><td align="left" valign="top">&bull; <a href="Thread-Stops.html#Thread-Stops" accesskey="5">Thread Stops</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Stopping and starting multi-thread programs
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