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| <title>Debugging with GDB: Auto-loading</title> |
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| <a name="Auto_002dloading"></a> |
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| <a name="Automatically-loading-associated-files"></a> |
| <h3 class="section">22.7 Automatically loading associated files</h3> |
| <a name="index-auto_002dloading"></a> |
| |
| <p><small>GDB</small> sometimes reads files with commands and settings automatically, |
| without being explicitly told so by the user. We call this feature |
| <em>auto-loading</em>. While auto-loading is useful for automatically adapting |
| <small>GDB</small> to the needs of your project, it can sometimes produce unexpected |
| results or introduce security risks (e.g., if the file comes from untrusted |
| sources). |
| </p> |
| <table class="menu" border="0" cellspacing="0"> |
| <tr><td align="left" valign="top">• <a href="Init-File-in-the-Current-Directory.html#Init-File-in-the-Current-Directory" accesskey="1">Init File in the Current Directory</a>:</td><td> </td><td align="left" valign="top">‘<samp>set/show/info auto-load local-gdbinit</samp>’ |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="libthread_005fdb_002eso_002e1-file.html#libthread_005fdb_002eso_002e1-file" accesskey="2">libthread_db.so.1 file</a>:</td><td> </td><td align="left" valign="top">‘<samp>set/show/info auto-load libthread-db</samp>’ |
| </td></tr> |
| <tr><th colspan="3" align="left" valign="top"><pre class="menu-comment"> |
| </pre></th></tr><tr><td align="left" valign="top">• <a href="Auto_002dloading-safe-path.html#Auto_002dloading-safe-path" accesskey="3">Auto-loading safe path</a>:</td><td> </td><td align="left" valign="top">‘<samp>set/show/info auto-load safe-path</samp>’ |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Auto_002dloading-verbose-mode.html#Auto_002dloading-verbose-mode" accesskey="4">Auto-loading verbose mode</a>:</td><td> </td><td align="left" valign="top">‘<samp>set/show debug auto-load</samp>’ |
| </td></tr> |
| </table> |
| |
| <p>There are various kinds of files <small>GDB</small> can automatically load. |
| In addition to these files, <small>GDB</small> supports auto-loading code written |
| in various extension languages. See <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions">Auto-loading extensions</a>. |
| </p> |
| <p>Note that loading of these associated files (including the local <samp>.gdbinit</samp> |
| file) requires accordingly configured <code>auto-load safe-path</code> |
| (see <a href="Auto_002dloading-safe-path.html#Auto_002dloading-safe-path">Auto-loading safe path</a>). |
| </p> |
| <p>For these reasons, <small>GDB</small> includes commands and options to let you |
| control when to auto-load files and which files should be auto-loaded. |
| </p> |
| <dl compact="compact"> |
| <dd><a name="set-auto_002dload-off"></a><a name="index-set-auto_002dload-off"></a> |
| </dd> |
| <dt><code>set auto-load off</code></dt> |
| <dd><p>Globally disable loading of all auto-loaded files. |
| You may want to use this command with the ‘<samp>-iex</samp>’ option |
| (see <a href="Startup.html#Option-_002dinit_002deval_002dcommand">Option -init-eval-command</a>) such as: |
| </p><div class="smallexample"> |
| <pre class="smallexample">$ <kbd>gdb -iex "set auto-load off" untrusted-executable corefile</kbd> |
| </pre></div> |
| |
| <p>Be aware that system init file (see <a href="System_002dwide-configuration.html#System_002dwide-configuration">System-wide configuration</a>) |
| and init files from your home directory (see <a href="Startup.html#Home-Directory-Init-File">Home Directory Init File</a>) |
| still get read (as they come from generally trusted directories). |
| To prevent <small>GDB</small> from auto-loading even those init files, use the |
| <samp>-nx</samp> option (see <a href="Mode-Options.html#Mode-Options">Mode Options</a>), in addition to |
| <code>set auto-load no</code>. |
| </p> |
| <a name="show-auto_002dload"></a><a name="index-show-auto_002dload"></a> |
| </dd> |
| <dt><code>show auto-load</code></dt> |
| <dd><p>Show whether auto-loading of each specific ‘<samp>auto-load</samp>’ file(s) is enabled |
| or disabled. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">(gdb) show auto-load |
| gdb-scripts: Auto-loading of canned sequences of commands scripts is on. |
| libthread-db: Auto-loading of inferior specific libthread_db is on. |
| local-gdbinit: Auto-loading of .gdbinit script from current directory |
| is on. |
| python-scripts: Auto-loading of Python scripts is on. |
| safe-path: List of directories from which it is safe to auto-load files |
| is $debugdir:$datadir/auto-load. |
| scripts-directory: List of directories from which to load auto-loaded scripts |
| is $debugdir:$datadir/auto-load. |
| </pre></div> |
| |
| <a name="info-auto_002dload"></a><a name="index-info-auto_002dload"></a> |
| </dd> |
| <dt><code>info auto-load</code></dt> |
| <dd><p>Print whether each specific ‘<samp>auto-load</samp>’ file(s) have been auto-loaded or |
| not. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">(gdb) info auto-load |
| gdb-scripts: |
| Loaded Script |
| Yes /home/user/gdb/gdb-gdb.gdb |
| libthread-db: No auto-loaded libthread-db. |
| local-gdbinit: Local .gdbinit file "/home/user/gdb/.gdbinit" has been |
| loaded. |
| python-scripts: |
| Loaded Script |
| Yes /home/user/gdb/gdb-gdb.py |
| </pre></div> |
| </dd> |
| </dl> |
| |
| <p>These are <small>GDB</small> control commands for the auto-loading: |
| </p> |
| <table> |
| <tr><td width="50%">See <a href="#set-auto_002dload-off">set auto-load off</a>.</td><td width="50%">Disable auto-loading globally.</td></tr> |
| <tr><td width="50%">See <a href="#show-auto_002dload">show auto-load</a>.</td><td width="50%">Show setting of all kinds of files.</td></tr> |
| <tr><td width="50%">See <a href="#info-auto_002dload">info auto-load</a>.</td><td width="50%">Show state of all kinds of files.</td></tr> |
| <tr><td width="50%">See <a href="Auto_002dloading-sequences.html#set-auto_002dload-gdb_002dscripts">set auto-load gdb-scripts</a>.</td><td width="50%">Control for <small>GDB</small> command scripts.</td></tr> |
| <tr><td width="50%">See <a href="Auto_002dloading-sequences.html#show-auto_002dload-gdb_002dscripts">show auto-load gdb-scripts</a>.</td><td width="50%">Show setting of <small>GDB</small> command scripts.</td></tr> |
| <tr><td width="50%">See <a href="Auto_002dloading-sequences.html#info-auto_002dload-gdb_002dscripts">info auto-load gdb-scripts</a>.</td><td width="50%">Show state of <small>GDB</small> command scripts.</td></tr> |
| <tr><td width="50%">See <a href="Python-Auto_002dloading.html#set-auto_002dload-python_002dscripts">set auto-load python-scripts</a>.</td><td width="50%">Control for <small>GDB</small> Python scripts.</td></tr> |
| <tr><td width="50%">See <a href="Python-Auto_002dloading.html#show-auto_002dload-python_002dscripts">show auto-load python-scripts</a>.</td><td width="50%">Show setting of <small>GDB</small> Python scripts.</td></tr> |
| <tr><td width="50%">See <a href="Python-Auto_002dloading.html#info-auto_002dload-python_002dscripts">info auto-load python-scripts</a>.</td><td width="50%">Show state of <small>GDB</small> Python scripts.</td></tr> |
| <tr><td width="50%">See <a href="Guile-Auto_002dloading.html#set-auto_002dload-guile_002dscripts">set auto-load guile-scripts</a>.</td><td width="50%">Control for <small>GDB</small> Guile scripts.</td></tr> |
| <tr><td width="50%">See <a href="Guile-Auto_002dloading.html#show-auto_002dload-guile_002dscripts">show auto-load guile-scripts</a>.</td><td width="50%">Show setting of <small>GDB</small> Guile scripts.</td></tr> |
| <tr><td width="50%">See <a href="Guile-Auto_002dloading.html#info-auto_002dload-guile_002dscripts">info auto-load guile-scripts</a>.</td><td width="50%">Show state of <small>GDB</small> Guile scripts.</td></tr> |
| <tr><td width="50%">See <a href="objfile_002dgdbdotext-file.html#set-auto_002dload-scripts_002ddirectory">set auto-load scripts-directory</a>.</td><td width="50%">Control for <small>GDB</small> auto-loaded scripts location.</td></tr> |
| <tr><td width="50%">See <a href="objfile_002dgdbdotext-file.html#show-auto_002dload-scripts_002ddirectory">show auto-load scripts-directory</a>.</td><td width="50%">Show <small>GDB</small> auto-loaded scripts location.</td></tr> |
| <tr><td width="50%">See <a href="objfile_002dgdbdotext-file.html#add_002dauto_002dload_002dscripts_002ddirectory">add-auto-load-scripts-directory</a>.</td><td width="50%">Add directory for auto-loaded scripts location list.</td></tr> |
| <tr><td width="50%">See <a href="Init-File-in-the-Current-Directory.html#set-auto_002dload-local_002dgdbinit">set auto-load local-gdbinit</a>.</td><td width="50%">Control for init file in the current directory.</td></tr> |
| <tr><td width="50%">See <a href="Init-File-in-the-Current-Directory.html#show-auto_002dload-local_002dgdbinit">show auto-load local-gdbinit</a>.</td><td width="50%">Show setting of init file in the current directory.</td></tr> |
| <tr><td width="50%">See <a href="Init-File-in-the-Current-Directory.html#info-auto_002dload-local_002dgdbinit">info auto-load local-gdbinit</a>.</td><td width="50%">Show state of init file in the current directory.</td></tr> |
| <tr><td width="50%">See <a href="libthread_005fdb_002eso_002e1-file.html#set-auto_002dload-libthread_002ddb">set auto-load libthread-db</a>.</td><td width="50%">Control for thread debugging library.</td></tr> |
| <tr><td width="50%">See <a href="libthread_005fdb_002eso_002e1-file.html#show-auto_002dload-libthread_002ddb">show auto-load libthread-db</a>.</td><td width="50%">Show setting of thread debugging library.</td></tr> |
| <tr><td width="50%">See <a href="libthread_005fdb_002eso_002e1-file.html#info-auto_002dload-libthread_002ddb">info auto-load libthread-db</a>.</td><td width="50%">Show state of thread debugging library.</td></tr> |
| <tr><td width="50%">See <a href="Auto_002dloading-safe-path.html#set-auto_002dload-safe_002dpath">set auto-load safe-path</a>.</td><td width="50%">Control directories trusted for automatic loading.</td></tr> |
| <tr><td width="50%">See <a href="Auto_002dloading-safe-path.html#show-auto_002dload-safe_002dpath">show auto-load safe-path</a>.</td><td width="50%">Show directories trusted for automatic loading.</td></tr> |
| <tr><td width="50%">See <a href="Auto_002dloading-safe-path.html#add_002dauto_002dload_002dsafe_002dpath">add-auto-load-safe-path</a>.</td><td width="50%">Add directory trusted for automatic loading.</td></tr> |
| </table> |
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