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| <title>Debugging with GDB: Python Auto-loading</title> |
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| <a name="Python-Auto_002dloading"></a> |
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| <a name="Python-Auto_002dloading-1"></a> |
| <h4 class="subsection">23.2.3 Python Auto-loading</h4> |
| <a name="index-Python-auto_002dloading"></a> |
| |
| <p>When a new object file is read (for example, due to the <code>file</code> |
| command, or because the inferior has loaded a shared library), |
| <small>GDB</small> will look for Python support scripts in several ways: |
| <samp><var>objfile</var>-gdb.py</samp> and <code>.debug_gdb_scripts</code> section. |
| See <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions">Auto-loading extensions</a>. |
| </p> |
| <p>The auto-loading feature is useful for supplying application-specific |
| debugging commands and scripts. |
| </p> |
| <p>Auto-loading can be enabled or disabled, |
| and the list of auto-loaded scripts can be printed. |
| </p> |
| <dl compact="compact"> |
| <dd><a name="set-auto_002dload-python_002dscripts"></a><a name="index-set-auto_002dload-python_002dscripts"></a> |
| </dd> |
| <dt><code>set auto-load python-scripts [on|off]</code></dt> |
| <dd><p>Enable or disable the auto-loading of Python scripts. |
| </p> |
| <a name="show-auto_002dload-python_002dscripts"></a><a name="index-show-auto_002dload-python_002dscripts"></a> |
| </dd> |
| <dt><code>show auto-load python-scripts</code></dt> |
| <dd><p>Show whether auto-loading of Python scripts is enabled or disabled. |
| </p> |
| <a name="info-auto_002dload-python_002dscripts"></a><a name="index-info-auto_002dload-python_002dscripts"></a> |
| <a name="index-print-list-of-auto_002dloaded-Python-scripts"></a> |
| </dd> |
| <dt><code>info auto-load python-scripts [<var>regexp</var>]</code></dt> |
| <dd><p>Print the list of all Python scripts that <small>GDB</small> auto-loaded. |
| </p> |
| <p>Also printed is the list of Python scripts that were mentioned in |
| the <code>.debug_gdb_scripts</code> section and were either not found |
| (see <a href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section">dotdebug_gdb_scripts section</a>) or were not auto-loaded due to |
| <code>auto-load safe-path</code> rejection (see <a href="Auto_002dloading.html#Auto_002dloading">Auto-loading</a>). |
| This is useful because their names are not printed when <small>GDB</small> |
| tries to load them and fails. There may be many of them, and printing |
| an error message for each one is problematic. |
| </p> |
| <p>If <var>regexp</var> is supplied only Python scripts with matching names are printed. |
| </p> |
| <p>Example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">(gdb) info auto-load python-scripts |
| Loaded Script |
| Yes py-section-script.py |
| full name: /tmp/py-section-script.py |
| No my-foo-pretty-printers.py |
| </pre></div> |
| </dd> |
| </dl> |
| |
| <p>When reading an auto-loaded file or script, <small>GDB</small> sets the |
| <em>current objfile</em>. This is available via the <code>gdb.current_objfile</code> |
| function (see <a href="Objfiles-In-Python.html#Objfiles-In-Python">Objfiles In Python</a>). This can be useful for |
| registering objfile-specific pretty-printers and frame-filters. |
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