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bpo-32047: -X dev enables asyncio debug mode (#4418)

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The new -X dev command line option now also enables asyncio debug
mode.
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Victor Stinner 2017-11-20 07:14:07 -08:00 • committed by GitHub
parent 04dee27208
commit 44862df2ee
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6 changed files with 42 additions and 18 deletions
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Doc/using/cmdline.rst
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@ -414,16 +414,18 @@ Miscellaneous options
application. Typical usage is ``python3 -X importtime -c 'import
asyncio'``. See also :envvar:`PYTHONPROFILEIMPORTTIME`.
* ``-X dev`` enables the "developer mode": enable debug checks at runtime.
In short, ``python3 -X dev ...`` behaves as ``PYTHONMALLOC=debug python3
In short, ``python3 -X dev ...`` behaves as ``PYTHONMALLOC=debug PYTHONASYNCIODEBUG=1 python3
-W default -X faulthandler ...``, except that the :envvar:`PYTHONMALLOC`
environment variable is not set in practice. Developer mode:
and :envvar:`PYTHONASYNCIODEBUG` environment variables are not set in
practice. Developer mode:
* Add ``default`` warnings option. For example, display
:exc:`DeprecationWarning` and :exc:`ResourceWarning` warnings.
* Install debug hooks on memory allocators as if :envvar:`PYTHONMALLOC`
is set to ``debug``.
* Install debug hooks on memory allocators: see the
:c:func:`PyMem_SetupDebugHooks` C function.
* Enable the :mod:`faulthandler` module to dump the Python traceback
on a crash.
* Enable :ref:`asyncio debug mode <asyncio-debug-mode>`.
It also allows passing arbitrary values and retrieving them through the
:data:`sys._xoptions` dictionary.