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181 lines
7.2 KiB
HTML
181 lines
7.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>List (Debugging with GDB)</title>
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<meta name="description" content="List (Debugging with GDB)">
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<meta name="keywords" content="List (Debugging with GDB)">
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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="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Source.html#Source" rel="up" title="Source">
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<link href="Specify-Location.html#Specify-Location" rel="next" title="Specify Location">
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<link href="Source.html#Source" rel="prev" title="Source">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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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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</div>
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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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</div>
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</body>
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</html>
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