119 lines
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119 lines
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<a name="objfile-gdbdotext-file"></a>
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<a name="objfile_002dgdbdotext-file"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section">dotdebug_gdb_scripts section</a>,
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Up: <a rel="up" accesskey="u" href="Auto_002dloading-extensions.html#Auto_002dloading-extensions">Auto-loading extensions</a>
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<h4 class="subsection">23.4.1 The <samp><var>objfile</var><span class="file">-gdb.</span><var>ext</var></samp> file</h4>
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<p><a name="index-g_t_0040file_007b_0040var_007bobjfile_007d_002dgdb_002egdb_007d-2883"></a><a name="index-g_t_0040file_007b_0040var_007bobjfile_007d_002dgdb_002epy_007d-2884"></a><a name="index-g_t_0040file_007b_0040var_007bobjfile_007d_002dgdb_002escm_007d-2885"></a>
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When a new object file is read, <span class="sc">gdb</span> looks for a file named
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<samp><var>objfile</var><span class="file">-gdb.</span><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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<dl>
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<dt><samp><var>objfile</var><span class="file">-gdb.gdb</span></samp><dd>GDB's own command language
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<br><dt><samp><var>objfile</var><span class="file">-gdb.py</span></samp><dd>Python
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<br><dt><samp><var>objfile</var><span class="file">-gdb.scm</span></samp><dd>Guile
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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><span class="file">-gdb.</span><var>ext</var></samp> suffix.
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If this file exists and is readable, <span class="sc">gdb</span> will evaluate it as a
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script in the specified extension language.
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<p>If this file does not exist, then <span class="sc">gdb</span> 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>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>For object files using <samp><span class="file">.exe</span></samp> suffix <span class="sc">gdb</span> tries to load first the
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scripts normally according to its <samp><span class="file">.exe</span></samp> filename. But if no scripts are
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found <span class="sc">gdb</span> also tries script filenames matching the object file without
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its <samp><span class="file">.exe</span></samp> suffix. This <samp><span class="file">.exe</span></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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<dl>
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<a name="set-auto_002dload-scripts_002ddirectory"></a><a name="index-set-auto_002dload-scripts_002ddirectory-2886"></a><dt><code>set auto-load scripts-directory </code><span class="roman">[</span><var>directories</var><span class="roman">]</span><dd>Control <span class="sc">gdb</span> 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><span class="samp">:</span></samp>’ on Unix, ‘<samp><span class="samp">;</span></samp>’ on MS-Windows and MS-DOS).
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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="set-auto_002dload-safe_002dpath.html#set-auto_002dload-safe_002dpath">set auto-load safe-path</a>).
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<p><a name="with_002dauto_002dload_002ddir"></a>This variable defaults to <samp><span class="file">$debugdir:$datadir/auto-load</span></samp>. The default
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<code>set auto-load safe-path</code> value can be also overriden by <span class="sc">gdb</span>
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configuration option <samp><span class="option">--with-auto-load-dir</span></samp>.
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<p>Any reference to <samp><span class="file">$debugdir</span></samp> will get replaced by
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<var>debug-file-directory</var> value (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>) and any
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reference to <samp><span class="file">$datadir</span></samp> will get replaced by <var>data-directory</var> which is
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determined at <span class="sc">gdb</span> startup (see <a href="Data-Files.html#Data-Files">Data Files</a>). <samp><span class="file">$debugdir</span></samp> and
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<samp><span class="file">$datadir</span></samp> must be placed as a directory component — either alone or
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delimited by <samp><span class="file">/</span></samp> or <samp><span class="file">\</span></samp> directory separators, depending on the host
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platform.
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<p>The list of directories uses path separator (‘<samp><span class="samp">:</span></samp>’ on GNU and Unix
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systems, ‘<samp><span class="samp">;</span></samp>’ on MS-Windows and MS-DOS) to separate directories, similarly
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to the <samp><span class="env">PATH</span></samp> environment variable.
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<p><a name="show-auto_002dload-scripts_002ddirectory"></a><a name="index-show-auto_002dload-scripts_002ddirectory-2887"></a><br><dt><code>show auto-load scripts-directory</code><dd>Show <span class="sc">gdb</span> auto-loaded scripts location.
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<p><a name="add_002dauto_002dload_002dscripts_002ddirectory"></a><a name="index-add_002dauto_002dload_002dscripts_002ddirectory-2888"></a><br><dt><code>add-auto-load-scripts-directory </code><span class="roman">[</span><var>directories</var><code>...</code><span class="roman">]</span><dd>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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</dl>
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<p><span class="sc">gdb</span> does not track which files it has already auto-loaded this way.
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<span class="sc">gdb</span> 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><span class="file">-gdb.</span><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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