bltinmodule.c: Added in b744ba1d and no longer necessary since d64e8a75
posixmodule.c: Added in d1cd4d41 and no longer necessary since efb00c0c
pythonrun.c:   Added in 73d538b9 and no longer necessary since d6009517
sysmodule.c:   Added in 5467d4c0 and no longer necessary since a2c17c58

possible.  Patch is writen with Coccinelle.

Replace:
    PyObject_CallFunctionObjArgs(callable, NULL)
with:
    _PyObject_CallNoArg(callable)

Don't declare dead code when the code is declared with Clang.

Issue #28858: The change b9c9691c72c5 introduced a regression. It seems like
_PyObject_CallArg1() uses more stack memory than
PyObject_CallFunctionObjArgs().

* PyObject_CallFunctionObjArgs(func, NULL) => _PyObject_CallNoArg(func)
* PyObject_CallFunctionObjArgs(func, arg, NULL) => _PyObject_CallArg1(func, arg)

PyObject_CallFunctionObjArgs() allocates 40 bytes on the C stack and requires
extra work to "parse" C arguments to build a C array of PyObject*.

_PyObject_CallNoArg() and _PyObject_CallArg1() are simpler and don't allocate
memory on the C stack.

This change is part of the fastcall project. The change on listsort() is
related to the issue #23507.

with PyUnicode_AsUTF8 and PyUnicode_AsUTF8AndSize.

Prevents crashes in some other posixmodule.c functions

Patch by Eryk Sun.

Issue #27778: Fix a memory leak in os.getrandom() when the getrandom() is
interrupted by a signal and a signal handler raises a Python exception.

Modify also os_getrandom_impl() to avoid the temporary buffer, use directly a
Python bytes object.

Issue #28200: Replace PyUnicode_AsWideCharString() with
PyUnicode_AsUnicodeAndSize().

I forgot there two variations of os.stat() in Python 3.5.

Patch by Eryk Sun.

Patch by Ed Schouten.

Patch by Eryk Sun.

Issue #27776: The os.urandom() function does now block on Linux 3.17 and newer
until the system urandom entropy pool is initialized to increase the security.

This change is part of the PEP 524.

Issue #27778: Expose the Linux getrandom() syscall as a new os.getrandom()
function.

This change is part of the PEP 524.

Issue #17884.

os.path.

Thanks to Jelle Zijlstra for the initial patch against posixmodule.c.

to ref count problem introduced in code for Issue #27038 in 3.6.0a3.
Patch by Xiang Zhang.