117 lines
5.6 KiB
HTML
117 lines
5.6 KiB
HTML
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<html lang="en">
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<head>
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<title>List - Debugging with GDB</title>
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<meta name="description" content="Debugging with GDB">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Source.html#Source" title="Source">
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<link rel="next" href="Specify-Location.html#Specify-Location" title="Specify Location">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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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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</head>
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<body>
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<div class="node">
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<a name="List"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Specify-Location.html#Specify-Location">Specify Location</a>,
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Up: <a rel="up" accesskey="u" href="Source.html#Source">Source</a>
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<hr>
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</div>
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<h3 class="section">9.1 Printing Source Lines</h3>
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<p><a name="index-list-555"></a><a name="index-l-_0040r_007b_0028_0040code_007blist_007d_0029_007d-556"></a>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>Here are the forms of the <code>list</code> command most commonly used:
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<dl>
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<dt><code>list </code><var>linenum</var><dd>Print lines centered around line number <var>linenum</var> in the
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current source file.
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<br><dt><code>list </code><var>function</var><dd>Print lines centered around the beginning of function
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<var>function</var>.
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<br><dt><code>list</code><dd>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 Stack</a>), this prints lines centered around that line.
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<br><dt><code>list -</code><dd>Print lines just before the lines last printed.
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</dl>
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<p><a name="index-g_t_0040code_007blist_007d_002c-how-many-lines-to-display-557"></a>By default, <span class="sc">gdb</span> 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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<a name="index-set-listsize-558"></a>
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<dl><dt><code>set listsize </code><var>count</var><dt><code>set listsize unlimited</code><dd>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><a name="index-show-listsize-559"></a><br><dt><code>show listsize</code><dd>Display the number of lines that <code>list</code> prints.
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</dl>
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<p>Repeating a <code>list</code> command with <RET> 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><span class="samp">-</span></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>In general, the <code>list</code> command expects you to supply zero, one or two
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<dfn>locations</dfn>. 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>Here is a complete description of the possible arguments for <code>list</code>:
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<dl>
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<dt><code>list </code><var>location</var><dd>Print lines centered around the line specified by <var>location</var>.
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<br><dt><code>list </code><var>first</var><code>,</code><var>last</var><dd>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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<br><dt><code>list ,</code><var>last</var><dd>Print lines ending with <var>last</var>.
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<br><dt><code>list </code><var>first</var><code>,</code><dd>Print lines starting with <var>first</var>.
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<br><dt><code>list +</code><dd>Print lines just after the lines last printed.
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<br><dt><code>list -</code><dd>Print lines just before the lines last printed.
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<br><dt><code>list</code><dd>As described in the preceding table.
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</dl>
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</body></html>
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