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merge 3.6

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Benjamin Peterson 2017-02-09 22:35:38 -08:00
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@ -396,21 +396,23 @@ Miscellaneous options
defines the following possible values: defines the following possible values:
* ``-X faulthandler`` to enable :mod:`faulthandler`; * ``-X faulthandler`` to enable :mod:`faulthandler`;
* ``-X showrefcount`` to enable the output of the total reference count * ``-X showrefcount`` to output the total reference count and number of used
and memory blocks (only works on debug builds); memory blocks when the program finishes or after each statement in the
interactive interpreter. This only works on debug builds.
* ``-X tracemalloc`` to start tracing Python memory allocations using the * ``-X tracemalloc`` to start tracing Python memory allocations using the
:mod:`tracemalloc` module. By default, only the most recent frame is :mod:`tracemalloc` module. By default, only the most recent frame is
stored in a traceback of a trace. Use ``-X tracemalloc=NFRAME`` to start stored in a traceback of a trace. Use ``-X tracemalloc=NFRAME`` to start
tracing with a traceback limit of *NFRAME* frames. See the tracing with a traceback limit of *NFRAME* frames. See the
:func:`tracemalloc.start` for more information. :func:`tracemalloc.start` for more information.
* ``-X showalloccount`` to enable the output of the total count of allocated * ``-X showalloccount`` to output the total count of allocated objects for
objects for each type (only works when built with ``COUNT_ALLOCS`` defined); each type when the program finishes. This only works when Python was built with
``COUNT_ALLOCS`` defined.
It also allows passing arbitrary values and retrieving them through the It also allows passing arbitrary values and retrieving them through the
:data:`sys._xoptions` dictionary. :data:`sys._xoptions` dictionary.
.. versionchanged:: 3.2 .. versionchanged:: 3.2
It is now allowed to pass :option:`-X` with CPython. The :option:`-X` option was added.
.. versionadded:: 3.3 .. versionadded:: 3.3
The ``-X faulthandler`` option. The ``-X faulthandler`` option.