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17<title>Debugging with GDB: Stopping</title>
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64<a name="Stopping"></a>
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66<p>
67Next: <a href="Reverse-Execution.html#Reverse-Execution" accesskey="n" rel="next">Reverse Execution</a>, Previous: <a href="Running.html#Running" accesskey="p" rel="previous">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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70<a name="Stopping-and-Continuing"></a>
71<h2 class="chapter">5 Stopping and Continuing</h2>
72
73<p>The principal purposes of using a debugger are so that you can stop your
74program before it terminates; or so that, if your program runs into
75trouble, you can investigate and find out why.
76</p>
77<p>Inside <small>GDB</small>, your program may stop for any of several reasons,
78such as a signal, a breakpoint, or reaching a new line after a
79<small>GDB</small> command such as <code>step</code>.  You may then examine and
80change variables, set new breakpoints or remove old ones, and then
81continue execution.  Usually, the messages shown by <small>GDB</small> provide
82ample explanation of the status of your program&mdash;but you can also
83explicitly request this information at any time.
84</p>
85<dl compact="compact">
86<dd><a name="index-info-program"></a>
87</dd>
88<dt><code>info program</code></dt>
89<dd><p>Display information about the status of your program: whether it is
90running or not, what process it is, and why it stopped.
91</p></dd>
92</dl>
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94<table class="menu" border="0" cellspacing="0">
95<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
96</td></tr>
97<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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100                                Skipping over functions and files
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103</td></tr>
104<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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