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167 lines
8.7 KiB
HTML
167 lines
8.7 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>objfile-gdbdotext file (Debugging with GDB)</title>
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<meta name="description" content="objfile-gdbdotext file (Debugging with GDB)">
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<meta name="keywords" content="objfile-gdbdotext file (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="Auto_002dloading-extensions.html#Auto_002dloading-extensions" rel="up" title="Auto-loading extensions">
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<link href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section" rel="next" title="dotdebug_gdb_scripts section">
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<link href="Auto_002dloading-extensions.html#Auto_002dloading-extensions" rel="prev" title="Auto-loading extensions">
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<style type="text/css">
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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="objfile_002dgdbdotext-file"></a>
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<div class="header">
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<p>
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Next: <a href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section" accesskey="n" rel="next">dotdebug_gdb_scripts section</a>, Up: <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions" accesskey="u" rel="up">Auto-loading extensions</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="The-objfile_002dgdb_002eext-file"></a>
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<h4 class="subsection">23.4.1 The <samp><var>objfile</var>-gdb.<var>ext</var></samp> file</h4>
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<a name="index-objfile_002dgdb_002egdb"></a>
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<a name="index-objfile_002dgdb_002epy"></a>
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<a name="index-objfile_002dgdb_002escm"></a>
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<p>When a new object file is read, <small>GDB</small> looks for a file named
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<samp><var>objfile</var>-gdb.<var>ext</var></samp> (we call it <var>script-name</var> below),
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where <var>objfile</var> is the object file’s name and
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where <var>ext</var> is the file extension for the extension language:
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</p>
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<dl compact="compact">
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<dt><code><samp><var>objfile</var>-gdb.gdb</samp></code></dt>
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<dd><p>GDB’s own command language
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</p></dd>
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<dt><code><samp><var>objfile</var>-gdb.py</samp></code></dt>
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<dd><p>Python
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</p></dd>
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<dt><code><samp><var>objfile</var>-gdb.scm</samp></code></dt>
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<dd><p>Guile
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</p></dd>
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</dl>
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<p><var>script-name</var> is formed by ensuring that the file name of <var>objfile</var>
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is absolute, following all symlinks, and resolving <code>.</code> and <code>..</code>
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components, and appending the <samp>-gdb.<var>ext</var></samp> suffix.
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If this file exists and is readable, <small>GDB</small> will evaluate it as a
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script in the specified extension language.
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</p>
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<p>If this file does not exist, then <small>GDB</small> will look for
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<var>script-name</var> file in all of the directories as specified below.
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</p>
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<p>Note that loading of these files requires an accordingly configured
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<code>auto-load safe-path</code> (see <a href="Auto_002dloading-safe-path.html#Auto_002dloading-safe-path">Auto-loading safe path</a>).
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</p>
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<p>For object files using <samp>.exe</samp> suffix <small>GDB</small> tries to load first the
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scripts normally according to its <samp>.exe</samp> filename. But if no scripts are
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found <small>GDB</small> also tries script filenames matching the object file without
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its <samp>.exe</samp> suffix. This <samp>.exe</samp> stripping is case insensitive and it
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is attempted on any platform. This makes the script filenames compatible
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between Unix and MS-Windows hosts.
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</p>
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<dl compact="compact">
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<dd><a name="set-auto_002dload-scripts_002ddirectory"></a><a name="index-set-auto_002dload-scripts_002ddirectory"></a>
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</dd>
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<dt><code>set auto-load scripts-directory <span class="roman">[</span><var>directories</var><span class="roman">]</span></code></dt>
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<dd><p>Control <small>GDB</small> auto-loaded scripts location. Multiple directory entries
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may be delimited by the host platform path separator in use
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(‘<samp>:</samp>’ on Unix, ‘<samp>;</samp>’ on MS-Windows and MS-DOS).
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</p>
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<p>Each entry here needs to be covered also by the security setting
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<code>set auto-load safe-path</code> (see <a href="Auto_002dloading-safe-path.html#set-auto_002dload-safe_002dpath">set auto-load safe-path</a>).
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</p>
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<a name="with_002dauto_002dload_002ddir"></a><p>This variable defaults to <samp>$debugdir:$datadir/auto-load</samp>. The default
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<code>set auto-load safe-path</code> value can be also overriden by <small>GDB</small>
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configuration option <samp>--with-auto-load-dir</samp>.
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</p>
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<p>Any reference to <samp>$debugdir</samp> will get replaced by
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<var>debug-file-directory</var> value (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>) and any
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reference to <samp>$datadir</samp> will get replaced by <var>data-directory</var> which is
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determined at <small>GDB</small> startup (see <a href="Data-Files.html#Data-Files">Data Files</a>). <samp>$debugdir</samp> and
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<samp>$datadir</samp> must be placed as a directory component — either alone or
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delimited by <samp>/</samp> or <samp>\</samp> directory separators, depending on the host
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platform.
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</p>
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<p>The list of directories uses path separator (‘<samp>:</samp>’ on GNU and Unix
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systems, ‘<samp>;</samp>’ on MS-Windows and MS-DOS) to separate directories, similarly
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to the <code>PATH</code> environment variable.
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</p>
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<a name="show-auto_002dload-scripts_002ddirectory"></a><a name="index-show-auto_002dload-scripts_002ddirectory"></a>
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</dd>
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<dt><code>show auto-load scripts-directory</code></dt>
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<dd><p>Show <small>GDB</small> auto-loaded scripts location.
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</p>
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<a name="add_002dauto_002dload_002dscripts_002ddirectory"></a><a name="index-add_002dauto_002dload_002dscripts_002ddirectory"></a>
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</dd>
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<dt><code>add-auto-load-scripts-directory <span class="roman">[</span><var>directories</var>…<span class="roman">]</span></code></dt>
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<dd><p>Add an entry (or list of entries) to the list of auto-loaded scripts locations.
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Multiple entries may be delimited by the host platform path separator in use.
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</p></dd>
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</dl>
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<p><small>GDB</small> does not track which files it has already auto-loaded this way.
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<small>GDB</small> will load the associated script every time the corresponding
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<var>objfile</var> is opened.
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So your <samp>-gdb.<var>ext</var></samp> file should be careful to avoid errors if it
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is evaluated more than once.
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section" accesskey="n" rel="next">dotdebug_gdb_scripts section</a>, Up: <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions" accesskey="u" rel="up">Auto-loading extensions</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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