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<title>Debugging with GDB: List</title>
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<a name="List"></a>
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<div class="header">
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<p>
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Next: <a href="Specify-Location.html#Specify-Location" accesskey="n" rel="next">Specify Location</a>, Up: <a href="Source.html#Source" accesskey="u" rel="up">Source</a> [<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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<hr>
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<a name="Printing-Source-Lines"></a>
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<h3 class="section">9.1 Printing Source Lines</h3>
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<a name="index-list"></a>
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<a name="index-l-_0028list_0029"></a>
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<p>To print lines from a source file, use the <code>list</code> command
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(abbreviated <code>l</code>). By default, ten lines are printed.
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There are several ways to specify what part of the file you want to
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print; see <a href="Specify-Location.html#Specify-Location">Specify Location</a>, for the full list.
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</p>
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<p>Here are the forms of the <code>list</code> command most commonly used:
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</p>
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<dl compact="compact">
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<dt><code>list <var>linenum</var></code></dt>
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<dd><p>Print lines centered around line number <var>linenum</var> in the
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current source file.
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</p>
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</dd>
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<dt><code>list <var>function</var></code></dt>
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<dd><p>Print lines centered around the beginning of function
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<var>function</var>.
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</p>
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</dd>
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<dt><code>list</code></dt>
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<dd><p>Print more lines. If the last lines printed were printed with a
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<code>list</code> command, this prints lines following the last lines
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printed; however, if the last line printed was a solitary line printed
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as part of displaying a stack frame (see <a href="Stack.html#Stack">Examining the
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Stack</a>), this prints lines centered around that line.
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</p>
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</dd>
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<dt><code>list -</code></dt>
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<dd><p>Print lines just before the lines last printed.
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</p></dd>
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</dl>
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<a name="index-list_002c-how-many-lines-to-display"></a>
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<p>By default, <small>GDB</small> prints ten source lines with any of these forms of
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the <code>list</code> command. You can change this using <code>set listsize</code>:
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</p>
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<dl compact="compact">
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<dd><a name="index-set-listsize"></a>
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</dd>
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<dt><code>set listsize <var>count</var></code></dt>
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<dt><code>set listsize unlimited</code></dt>
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<dd><p>Make the <code>list</code> command display <var>count</var> source lines (unless
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the <code>list</code> argument explicitly specifies some other number).
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Setting <var>count</var> to <code>unlimited</code> or 0 means there’s no limit.
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</p>
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<a name="index-show-listsize"></a>
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</dd>
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<dt><code>show listsize</code></dt>
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<dd><p>Display the number of lines that <code>list</code> prints.
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</p></dd>
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</dl>
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<p>Repeating a <code>list</code> command with <tt class="key">RET</tt> discards the argument,
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so it is equivalent to typing just <code>list</code>. This is more useful
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than listing the same lines again. An exception is made for an
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argument of ‘<samp>-</samp>’; that argument is preserved in repetition so that
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each repetition moves up in the source file.
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</p>
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<p>In general, the <code>list</code> command expects you to supply zero, one or two
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<em>locations</em>. Locations specify source lines; there are several ways
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of writing them (see <a href="Specify-Location.html#Specify-Location">Specify Location</a>), but the effect is always
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to specify some source line.
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</p>
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<p>Here is a complete description of the possible arguments for <code>list</code>:
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</p>
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<dl compact="compact">
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<dt><code>list <var>location</var></code></dt>
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<dd><p>Print lines centered around the line specified by <var>location</var>.
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</p>
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</dd>
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<dt><code>list <var>first</var>,<var>last</var></code></dt>
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<dd><p>Print lines from <var>first</var> to <var>last</var>. Both arguments are
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locations. When a <code>list</code> command has two locations, and the
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source file of the second location is omitted, this refers to
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the same source file as the first location.
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</p>
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</dd>
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<dt><code>list ,<var>last</var></code></dt>
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<dd><p>Print lines ending with <var>last</var>.
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</p>
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</dd>
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<dt><code>list <var>first</var>,</code></dt>
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<dd><p>Print lines starting with <var>first</var>.
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</p>
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</dd>
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<dt><code>list +</code></dt>
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<dd><p>Print lines just after the lines last printed.
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</p>
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</dd>
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<dt><code>list -</code></dt>
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<dd><p>Print lines just before the lines last printed.
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</p>
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</dd>
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<dt><code>list</code></dt>
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<dd><p>As described in the preceding table.
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</p></dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Specify-Location.html#Specify-Location" accesskey="n" rel="next">Specify Location</a>, Up: <a href="Source.html#Source" accesskey="u" rel="up">Source</a> [<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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