99 lines
5.0 KiB
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99 lines
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<title>Python Auto-loading - Debugging with GDB</title>
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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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<div class="node">
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<a name="Python-Auto-loading"></a>
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<a name="Python-Auto_002dloading"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Python-modules.html#Python-modules">Python modules</a>,
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Previous: <a rel="previous" accesskey="p" href="Python-API.html#Python-API">Python API</a>,
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Up: <a rel="up" accesskey="u" href="Python.html#Python">Python</a>
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<hr>
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</div>
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<h4 class="subsection">23.2.3 Python Auto-loading</h4>
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<p><a name="index-Python-auto_002dloading-2437"></a>
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When a new object file is read (for example, due to the <code>file</code>
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command, or because the inferior has loaded a shared library),
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<span class="sc">gdb</span> will look for Python support scripts in several ways:
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<samp><var>objfile</var><span class="file">-gdb.py</span></samp> and <code>.debug_gdb_scripts</code> section.
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See <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions">Auto-loading extensions</a>.
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<p>The auto-loading feature is useful for supplying application-specific
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debugging commands and scripts.
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<p>Auto-loading can be enabled or disabled,
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and the list of auto-loaded scripts can be printed.
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<dl>
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<a name="set-auto_002dload-python_002dscripts"></a><a name="index-set-auto_002dload-python_002dscripts-2438"></a><dt><code>set auto-load python-scripts [on|off]</code><dd>Enable or disable the auto-loading of Python scripts.
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<p><a name="show-auto_002dload-python_002dscripts"></a><a name="index-show-auto_002dload-python_002dscripts-2439"></a><br><dt><code>show auto-load python-scripts</code><dd>Show whether auto-loading of Python scripts is enabled or disabled.
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<p><a name="info-auto_002dload-python_002dscripts"></a><a name="index-info-auto_002dload-python_002dscripts-2440"></a><a name="index-print-list-of-auto_002dloaded-Python-scripts-2441"></a><br><dt><code>info auto-load python-scripts [</code><var>regexp</var><code>]</code><dd>Print the list of all Python scripts that <span class="sc">gdb</span> auto-loaded.
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<p>Also printed is the list of Python scripts that were mentioned in
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the <code>.debug_gdb_scripts</code> section and were either not found
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(see <a href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section">dotdebug_gdb_scripts section</a>) or were not auto-loaded due to
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<code>auto-load safe-path</code> rejection (see <a href="Auto_002dloading.html#Auto_002dloading">Auto-loading</a>).
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This is useful because their names are not printed when <span class="sc">gdb</span>
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tries to load them and fails. There may be many of them, and printing
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an error message for each one is problematic.
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<p>If <var>regexp</var> is supplied only Python scripts with matching names are printed.
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<p>Example:
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<pre class="smallexample"> (gdb) info auto-load python-scripts
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Loaded Script
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Yes py-section-script.py
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full name: /tmp/py-section-script.py
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No my-foo-pretty-printers.py
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</pre>
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</dl>
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<p>When reading an auto-loaded file or script, <span class="sc">gdb</span> sets the
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<dfn>current objfile</dfn>. This is available via the <code>gdb.current_objfile</code>
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function (see <a href="Objfiles-In-Python.html#Objfiles-In-Python">Objfiles In Python</a>). This can be useful for
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registering objfile-specific pretty-printers and frame-filters.
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</body></html>
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