176 lines
14 KiB
HTML
176 lines
14 KiB
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<html lang="en">
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<head>
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<title>Auto-loading - 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="Controlling-GDB.html#Controlling-GDB" title="Controlling GDB">
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<link rel="prev" href="ABI.html#ABI" title="ABI">
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<link rel="next" href="Messages_002fWarnings.html#Messages_002fWarnings" title="Messages/Warnings">
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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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</head>
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<body>
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<div class="node">
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<a name="Auto-loading"></a>
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<a name="Auto_002dloading"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Messages_002fWarnings.html#Messages_002fWarnings">Messages/Warnings</a>,
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Previous: <a rel="previous" accesskey="p" href="ABI.html#ABI">ABI</a>,
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Up: <a rel="up" accesskey="u" href="Controlling-GDB.html#Controlling-GDB">Controlling GDB</a>
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<hr>
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</div>
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<h3 class="section">22.8 Automatically loading associated files</h3>
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<p><a name="index-auto_002dloading-1711"></a>
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<span class="sc">gdb</span> sometimes reads files with commands and settings automatically,
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without being explicitly told so by the user. We call this feature
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<dfn>auto-loading</dfn>. While auto-loading is useful for automatically adapting
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<span class="sc">gdb</span> to the needs of your project, it can sometimes produce unexpected
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results or introduce security risks (e.g., if the file comes from untrusted
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sources).
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<ul class="menu">
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<li><a accesskey="1" href="Init-File-in-the-Current-Directory.html#Init-File-in-the-Current-Directory">Init File in the Current Directory</a>: ‘<samp><span class="samp">set/show/info auto-load local-gdbinit</span></samp>’
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<li><a accesskey="2" href="libthread_005fdb_002eso_002e1-file.html#libthread_005fdb_002eso_002e1-file">libthread_db.so.1 file</a>: ‘<samp><span class="samp">set/show/info auto-load libthread-db</span></samp>’
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<li><a accesskey="3" href="Auto_002dloading-safe-path.html#Auto_002dloading-safe-path">Auto-loading safe path</a>: ‘<samp><span class="samp">set/show/info auto-load safe-path</span></samp>’
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<li><a accesskey="4" href="Auto_002dloading-verbose-mode.html#Auto_002dloading-verbose-mode">Auto-loading verbose mode</a>: ‘<samp><span class="samp">set/show debug auto-load</span></samp>’
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</ul>
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<p>There are various kinds of files <span class="sc">gdb</span> can automatically load.
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In addition to these files, <span class="sc">gdb</span> supports auto-loading code written
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in various extension languages. See <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions">Auto-loading extensions</a>.
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<p>Note that loading of these associated files (including the local <samp><span class="file">.gdbinit</span></samp>
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file) requires accordingly configured <code>auto-load safe-path</code>
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(see <a href="Auto_002dloading-safe-path.html#Auto_002dloading-safe-path">Auto-loading safe path</a>).
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<p>For these reasons, <span class="sc">gdb</span> includes commands and options to let you
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control when to auto-load files and which files should be auto-loaded.
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<dl>
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<a name="set-auto_002dload-off"></a><a name="index-set-auto_002dload-off-1712"></a><dt><code>set auto-load off</code><dd>Globally disable loading of all auto-loaded files.
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You may want to use this command with the ‘<samp><span class="samp">-iex</span></samp>’ option
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(see <a href="Option-_002dinit_002deval_002dcommand.html#Option-_002dinit_002deval_002dcommand">Option -init-eval-command</a>) such as:
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<pre class="smallexample"> $ <kbd>gdb -iex "set auto-load off" untrusted-executable corefile</kbd>
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</pre>
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<p>Be aware that system init file (see <a href="System_002dwide-configuration.html#System_002dwide-configuration">System-wide configuration</a>)
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and init files from your home directory (see <a href="Home-Directory-Init-File.html#Home-Directory-Init-File">Home Directory Init File</a>)
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still get read (as they come from generally trusted directories).
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To prevent <span class="sc">gdb</span> from auto-loading even those init files, use the
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<samp><span class="option">-nx</span></samp> option (see <a href="Mode-Options.html#Mode-Options">Mode Options</a>), in addition to
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<code>set auto-load no</code>.
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<p><a name="show-auto_002dload"></a><a name="index-show-auto_002dload-1713"></a><br><dt><code>show auto-load</code><dd>Show whether auto-loading of each specific ‘<samp><span class="samp">auto-load</span></samp>’ file(s) is enabled
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or disabled.
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<pre class="smallexample"> (gdb) show auto-load
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gdb-scripts: Auto-loading of canned sequences of commands scripts is on.
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libthread-db: Auto-loading of inferior specific libthread_db is on.
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local-gdbinit: Auto-loading of .gdbinit script from current directory
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is on.
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python-scripts: Auto-loading of Python scripts is on.
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safe-path: List of directories from which it is safe to auto-load files
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is $debugdir:$datadir/auto-load.
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scripts-directory: List of directories from which to load auto-loaded scripts
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is $debugdir:$datadir/auto-load.
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</pre>
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<p><a name="info-auto_002dload"></a><a name="index-info-auto_002dload-1714"></a><br><dt><code>info auto-load</code><dd>Print whether each specific ‘<samp><span class="samp">auto-load</span></samp>’ file(s) have been auto-loaded or
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not.
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<pre class="smallexample"> (gdb) info auto-load
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gdb-scripts:
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Loaded Script
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Yes /home/user/gdb/gdb-gdb.gdb
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libthread-db: No auto-loaded libthread-db.
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local-gdbinit: Local .gdbinit file "/home/user/gdb/.gdbinit" has been
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loaded.
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python-scripts:
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Loaded Script
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Yes /home/user/gdb/gdb-gdb.py
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</pre>
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</dl>
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<p>These are <span class="sc">gdb</span> control commands for the auto-loading:
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<p><table summary=""><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-off.html#set-auto_002dload-off">set auto-load off</a>.
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</td><td valign="top" width="50%">Disable auto-loading globally.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload.html#show-auto_002dload">show auto-load</a>.
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</td><td valign="top" width="50%">Show setting of all kinds of files.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="info-auto_002dload.html#info-auto_002dload">info auto-load</a>.
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</td><td valign="top" width="50%">Show state of all kinds of files.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-gdb_002dscripts.html#set-auto_002dload-gdb_002dscripts">set auto-load gdb-scripts</a>.
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</td><td valign="top" width="50%">Control for <span class="sc">gdb</span> command scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-gdb_002dscripts.html#show-auto_002dload-gdb_002dscripts">show auto-load gdb-scripts</a>.
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</td><td valign="top" width="50%">Show setting of <span class="sc">gdb</span> command scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="info-auto_002dload-gdb_002dscripts.html#info-auto_002dload-gdb_002dscripts">info auto-load gdb-scripts</a>.
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</td><td valign="top" width="50%">Show state of <span class="sc">gdb</span> command scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-python_002dscripts.html#set-auto_002dload-python_002dscripts">set auto-load python-scripts</a>.
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</td><td valign="top" width="50%">Control for <span class="sc">gdb</span> Python scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-python_002dscripts.html#show-auto_002dload-python_002dscripts">show auto-load python-scripts</a>.
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</td><td valign="top" width="50%">Show setting of <span class="sc">gdb</span> Python scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="info-auto_002dload-python_002dscripts.html#info-auto_002dload-python_002dscripts">info auto-load python-scripts</a>.
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</td><td valign="top" width="50%">Show state of <span class="sc">gdb</span> Python scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-guile_002dscripts.html#set-auto_002dload-guile_002dscripts">set auto-load guile-scripts</a>.
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</td><td valign="top" width="50%">Control for <span class="sc">gdb</span> Guile scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-guile_002dscripts.html#show-auto_002dload-guile_002dscripts">show auto-load guile-scripts</a>.
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</td><td valign="top" width="50%">Show setting of <span class="sc">gdb</span> Guile scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="info-auto_002dload-guile_002dscripts.html#info-auto_002dload-guile_002dscripts">info auto-load guile-scripts</a>.
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</td><td valign="top" width="50%">Show state of <span class="sc">gdb</span> Guile scripts.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-scripts_002ddirectory.html#set-auto_002dload-scripts_002ddirectory">set auto-load scripts-directory</a>.
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</td><td valign="top" width="50%">Control for <span class="sc">gdb</span> auto-loaded scripts location.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-scripts_002ddirectory.html#show-auto_002dload-scripts_002ddirectory">show auto-load scripts-directory</a>.
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</td><td valign="top" width="50%">Show <span class="sc">gdb</span> auto-loaded scripts location.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="add_002dauto_002dload_002dscripts_002ddirectory.html#add_002dauto_002dload_002dscripts_002ddirectory">add-auto-load-scripts-directory</a>.
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</td><td valign="top" width="50%">Add directory for auto-loaded scripts location list.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-local_002dgdbinit.html#set-auto_002dload-local_002dgdbinit">set auto-load local-gdbinit</a>.
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</td><td valign="top" width="50%">Control for init file in the current directory.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-local_002dgdbinit.html#show-auto_002dload-local_002dgdbinit">show auto-load local-gdbinit</a>.
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</td><td valign="top" width="50%">Show setting of init file in the current directory.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="info-auto_002dload-local_002dgdbinit.html#info-auto_002dload-local_002dgdbinit">info auto-load local-gdbinit</a>.
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</td><td valign="top" width="50%">Show state of init file in the current directory.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-libthread_002ddb.html#set-auto_002dload-libthread_002ddb">set auto-load libthread-db</a>.
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</td><td valign="top" width="50%">Control for thread debugging library.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-libthread_002ddb.html#show-auto_002dload-libthread_002ddb">show auto-load libthread-db</a>.
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</td><td valign="top" width="50%">Show setting of thread debugging library.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="info-auto_002dload-libthread_002ddb.html#info-auto_002dload-libthread_002ddb">info auto-load libthread-db</a>.
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</td><td valign="top" width="50%">Show state of thread debugging library.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="set-auto_002dload-safe_002dpath.html#set-auto_002dload-safe_002dpath">set auto-load safe-path</a>.
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</td><td valign="top" width="50%">Control directories trusted for automatic loading.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="show-auto_002dload-safe_002dpath.html#show-auto_002dload-safe_002dpath">show auto-load safe-path</a>.
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</td><td valign="top" width="50%">Show directories trusted for automatic loading.
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<br></td></tr><tr align="left"><td valign="top" width="50%">See <a href="add_002dauto_002dload_002dsafe_002dpath.html#add_002dauto_002dload_002dsafe_002dpath">add-auto-load-safe-path</a>.
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</td><td valign="top" width="50%">Add directory trusted for automatic loading.
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<br></td></tr></table>
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</body></html>
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