python / cpython

…2729)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
Co-authored-by: Shantanu <hauntsaninja@users.noreply.github.com>

…it working dir (GH-19910)

…build (GH-16334)

…sage (GH-19940)

….rst (GH-22726)

Since c19c5a6, AIX builds have defaulted to using dynload_shlib over
dynload_aix when dlopen is available. This function has been available
since AIX 4.3, which went out of support in 2003, the same year the
previously referenced commit was made. It has been nearly 20 years
since a version of AIX has been supported which has not used
dynload_shlib so there's no reason to keep this legacy code around.

* Move the codecs' (un)register operation to testcases.
* Remove _codecs._forget_codec() and _PyCodec_Forget()

Prepare unicodedata to add a state per module: start with a global
"module" state, pass it to subfunctions which access &UCD_Type. This
change also prepares the conversion of the UCD_Type static type to a
heap type.

When running in a non-UTF-8 locale, if an error occurs while importing a
native Python module (say because a dependent share library is missing),
the error message string returned may contain non-ASCII code points
causing a UnicodeDecodeError.

PyUnicode_DecodeFSDefault is used for buffers which may contain
filesystem  paths. For consistency with os.strerror(),
PyUnicode_DecodeLocale is used for buffers which contain system error
messages. While the shortname parameter is always encoded in ASCII
according to PEP 489, it is left decoded using PyUnicode_FromString to
minimize the changes and since it should not affect the decoding (albeit
_potentially_ slower).

In dynload_hpux, since the error buffer contains a message generated
from a static ASCII string and the module filesystem path,
PyUnicode_DecodeFSDefault is used instead of PyUnicode_DecodeLocale as
is used elsewhere.

* bpo-41894: Fix bugs in dynload error msg handling

For both dynload_aix and dynload_hpux, properly handle the possibility
that decoding strings may return NULL and when such an error happens,
properly decrement any previously decoded strings and return early.

In addition, in dynload_aix, ensure that we pass the decoded string
*object* pathname_ob to PyErr_SetImportError instead of the original
pathname buffer.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

…cters (GH-22219)

All references to this dynamic loading method were removed in b9949db,
when support for this method was dropped, but the implementation code
was not dropped (seemingly in oversight).

This API is relatively lightweight and organizationally, given that it's
used by multiple modules, it makes sense to move it to fileutils.

Requires making sure that _posixsubprocess is compiled with the appropriate
Py_BUIILD_CORE_BUILTIN macro.

Fix a null pointer dereference in tracemalloc_copy_trace()
of _tracemalloc.

This suppression is no longer needed in os_closerange_impl, as it just
invokes the internal _Py_closerange implementation. On the other hand,
consumers of _Py_closerange may not have any other reason to suppress
invalid parameter issues, so narrow the scope to here.

Fix typo in the "Context manager types" section in `typing.rst`.

Automerge-Triggered-By: @gvanrossum

…m_self is kept alive long enough (GH-22670)

Automerge-Triggered-By: @pablogsal