1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- Copyright (C) 1988-2021 Free Software Foundation, Inc. 4 5Permission is granted to copy, distribute and/or modify this document 6under the terms of the GNU Free Documentation License, Version 1.3 or 7any later version published by the Free Software Foundation; with the 8Invariant Sections being "Free Software" and "Free Software Needs 9Free Documentation", with the Front-Cover Texts being "A GNU Manual," 10and with the Back-Cover Texts as in (a) below. 11 12(a) The FSF's Back-Cover Text is: "You are free to copy and modify 13this GNU Manual. 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To return to <small>GDB</small>, 85type <kbd>,q</kbd> or the <code>EOF</code> character (e.g., <kbd>Ctrl-D</kbd> on 86an empty prompt). These commands do not take any arguments. 87</p> 88<a name="index-guile"></a> 89<a name="index-gu"></a> 90</dd> 91<dt><code>guile <span class="roman">[</span><var>scheme-expression</var><span class="roman">]</span></code></dt> 92<dt><code>gu <span class="roman">[</span><var>scheme-expression</var><span class="roman">]</span></code></dt> 93<dd><p>The <code>guile</code> command can be used to evaluate a Scheme expression. 94</p> 95<p>If given an argument, <small>GDB</small> will pass the argument to the Guile 96interpreter for evaluation. 97</p> 98<div class="smallexample"> 99<pre class="smallexample">(gdb) guile (display (+ 20 3)) (newline) 10023 101</pre></div> 102 103<p>The result of the Scheme expression is displayed using normal Guile rules. 104</p> 105<div class="smallexample"> 106<pre class="smallexample">(gdb) guile (+ 20 3) 10723 108</pre></div> 109 110<p>If you do not provide an argument to <code>guile</code>, it will act as a 111multi-line command, like <code>define</code>. In this case, the Guile 112script is made up of subsequent command lines, given after the 113<code>guile</code> command. This command list is terminated using a line 114containing <code>end</code>. For example: 115</p> 116<div class="smallexample"> 117<pre class="smallexample">(gdb) guile 118>(display 23) 119>(newline) 120>end 12123 122</pre></div> 123</dd> 124</dl> 125 126<p>It is also possible to execute a Guile script from the <small>GDB</small> 127interpreter: 128</p> 129<dl compact="compact"> 130<dt><code>source <samp>script-name</samp></code></dt> 131<dd><p>The script name must end with ‘<samp>.scm</samp>’ and <small>GDB</small> must be configured 132to recognize the script language based on filename extension using 133the <code>script-extension</code> setting. See <a href="Extending-GDB.html#Extending-GDB">Extending GDB</a>. 134</p> 135</dd> 136<dt><code>guile (load "script-name")</code></dt> 137<dd><p>This method uses the <code>load</code> Guile function. 138It takes a string argument that is the name of the script to load. 139See the Guile documentation for a description of this function. 140(see <a href="http://www.gnu.org/software/guile/manual/html_node/Loading.html#Loading">Loading</a> in <cite>GNU Guile Reference Manual</cite>). 141</p></dd> 142</dl> 143 144<hr> 145<div class="header"> 146<p> 147Next: <a href="Guile-API.html#Guile-API" accesskey="n" rel="next">Guile API</a>, Previous: <a href="Guile-Introduction.html#Guile-Introduction" accesskey="p" rel="previous">Guile Introduction</a>, Up: <a href="Guile.html#Guile" accesskey="u" rel="up">Guile</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> 148</div> 149 150 151 152</body> 153</html> 154