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Eric Snow da151fdc7a
[3.12] gh-105699: Use a _Py_hashtable_t for the PyModuleDef Cache (gh-106974) (gh-107412) 
gh-105699: Use a _Py_hashtable_t for the PyModuleDef Cache (gh-106974)

This fixes a crasher due to a race condition, triggered infrequently when two isolated (own GIL) subinterpreters simultaneously initialize their sys or builtins modules.  The crash happened due the combination of the "detached" thread state we were using and the "last holder" logic we use for the GIL.  It turns out it's tricky to use the same thread state for different threads.  Who could have guessed?

We solve the problem by eliminating the one object we were still sharing between interpreters.  We replace it with a low-level hashtable, using the "raw" allocator to avoid tying it to the main interpreter.

We also remove the accommodations for "detached" thread states, which were a dubious idea to start with.

(cherry picked from commit 8ba4df91ae)
2023-07-28 23:16:12 +00:00
..
cpython [3.12] GH-106897: Add RERAISE event to sys.monitoring. (GH-107291) (GH-107346) 2023-07-28 09:48:35 +01:00
internal [3.12] gh-105699: Use a _Py_hashtable_t for the PyModuleDef Cache (gh-106974) (gh-107412) 2023-07-28 23:16:12 +00:00
abstract.h gh-98586: Add vector call APIs to the Limited API (GH-98587) 2022-10-27 11:45:42 +02:00
bltinmodule.h
boolobject.h gh-84436: Implement Immortal Objects (gh-19474) 2023-04-22 13:39:37 -06:00
bytearrayobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
bytesobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
ceval.h gh-87347: Add parenthesis around macro arguments (#93915) 2022-06-20 16:04:52 +02:00
codecs.h
compile.h
complexobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
datetime.h gh-87347: Add parenthesis around macro arguments (#93915) 2022-06-20 16:04:52 +02:00
descrobject.h gh-103509: PEP 697 -- Limited C API for Extending Opaque Types (GH-103511) 2023-05-04 09:56:53 +02:00
dictobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
dynamic_annotations.h gh-96959: Update HTTP links which are redirected to HTTPS (GH-96961) 2022-09-24 14:38:53 +03:00
enumobject.h
errcode.h bpo-46521: Fix codeop to use a new partial-input mode of the parser (GH-31010) 2022-02-08 11:54:37 +00:00
exports.h gh-88267: Avoid DLL exporting functions from static builds on Windows(GH-99888) 2022-12-09 11:16:15 +00:00
fileobject.h [3.12] gh-77782: Deprecate Py_HasFileSystemDefaultEncoding (GH-106272) (#106274) 2023-06-30 10:21:36 +00:00
fileutils.h bpo-45434: Remove useless space in includes (GH-28963) 2021-10-15 01:50:04 +02:00
floatobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
frameobject.h bpo-45434: Remove useless space in includes (GH-28963) 2021-10-15 01:50:04 +02:00
genericaliasobject.h bpo-44654: Refactor and clean up the union type implementation (GH-27196) 2021-07-17 22:44:10 +03:00
import.h gh-87347: Add parenthesis around macro arguments (#93915) 2022-06-20 16:04:52 +02:00
interpreteridobject.h [3.12] gh-101524: Only Use Public C-API in the _xxsubinterpreters Module (gh-105258) (gh-107303) 2023-07-27 13:15:47 -06:00
intrcheck.h
iterobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
listobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
longobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
marshal.h bpo-45474: Exclude all of marshal.h if Py_LIMITED_API is defined (GH-29061) 2021-10-20 02:32:14 -07:00
memoryobject.h gh-79315: Add Include/cpython/memoryobject.h header (#99723) 2022-11-23 15:44:42 +01:00
methodobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
modsupport.h [3.12] gh-107226: PyModule_AddObjectRef() should only be in the limited API 3.10 (GH-107227) (GH-107260) 2023-07-25 23:01:18 +03:00
moduleobject.h gh-99113: Add Py_MOD_PER_INTERPRETER_GIL_SUPPORTED (gh-104205) 2023-05-05 21:11:27 +00:00
object.h [3.12] gh-105059: Fix MSCV compiler warning on PyObject union (GH-107239) (#107248) 2023-07-25 15:35:49 +00:00
objimpl.h gh-102013: Add PyUnstable_GC_VisitObjects (#102014) 2023-03-14 01:35:54 +00:00
opcode.h gh-103865: add monitoring support to LOAD_SUPER_ATTR (#103866) 2023-05-16 10:29:00 -06:00
osdefs.h
osmodule.h
patchlevel.h Post 3.12.0b4 2023-07-11 18:05:38 +02:00
py_curses.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
pybuffer.h gh-102500: Implement PEP 688 (#102521) 2023-05-04 07:59:46 -07:00
pycapsule.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
pydtrace.d
pydtrace.h Fix pydtrace.d path comment in Include/pydtrace.h (#28539) 2022-12-31 22:40:25 +05:30
pyerrors.h GH-101578: Normalize the current exception (GH-101607) 2023-02-08 09:31:12 +00:00
pyexpat.h
pyframe.h gh-93937, C API: Move PyFrame_GetBack() to Python.h (#93938) 2022-06-19 12:02:33 +02:00
pyhash.h bpo-29410: Change the default hash algorithm to SipHash13. (GH-28752) 2021-10-10 17:29:46 +09:00
pylifecycle.h bpo-43931: Export Python version as API data (GH-25577) 2021-12-09 17:52:05 -08:00
pymacconfig.h gh-93202: Always use %zd printf formatter (#93201) 2022-05-25 14:21:36 +02:00
pymacro.h gh-99069: Consolidate checks for static_assert (#94766) 2023-04-05 17:09:19 +02:00
pymath.h gh-104263: Rely on Py_NAN and introduce Py_INFINITY (GH-104202) 2023-05-10 17:44:52 +01:00
pymem.h gh-87347: Add parenthesis around macro arguments (#93915) 2022-06-20 16:04:52 +02:00
pyport.h gh-103509: PEP 697 -- Limited C API for Extending Opaque Types (GH-103511) 2023-05-04 09:56:53 +02:00
pystate.h bpo-45459: C API uses type names rather than structure names (GH-31528) 2022-02-24 17:51:59 +01:00
pystats.h Remove useless symbol in pystats.h (#101864) 2023-04-09 14:13:21 +05:30
pystrcmp.h
pystrtod.h bpo-45995: add "z" format specifer to coerce negative 0 to zero (GH-30049) 2022-04-11 15:34:18 +01:00
Python.h bpo-35134: Remove the Include/code.h header file (GH-32385) 2022-04-07 02:29:52 +02:00
pythonrun.h gh-102755: PyErr_DisplayException only in ABI >= 3.12. Tests cover PyErr_Display as well (GH-102849) 2023-03-21 10:36:18 +01:00
pythread.h bpo-42047: Add native thread ID for DragonFlyBSD (#22714) 2022-05-18 15:10:10 +02:00
pytypedefs.h bpo-45459: Fix PyModuleDef_Slot type in the limited C API (GH-31668) 2022-03-03 23:06:55 +01:00
rangeobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
README.rst gh-101101: Unstable C API tier (PEP 689) (GH-101102) 2023-02-28 09:31:01 +01:00
setobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
sliceobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
structmember.h gh-47146: Soft-deprecate structmember.h, expose its contents via Python.h (GH-99014) 2022-11-22 08:25:43 +01:00
structseq.h gh-87347: Add parenthesis around macro arguments (#93915) 2022-06-20 16:04:52 +02:00
sysmodule.h gh-103295: expose API for writing perf map files (#103546) 2023-05-21 11:12:24 +01:00
traceback.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
tracemalloc.h GH-101520: Move tracemalloc functionality into core, leaving interface in Modules. (#104508) 2023-05-17 14:17:16 +01:00
tupleobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00
typeslots.h bpo-45459: Add Py_buffer to limited API (GH-29991) 2022-02-02 07:03:10 -08:00
unicodeobject.h Fix typo in "expected" word in few source files (#104034) 2023-05-01 09:45:50 -06:00
warnings.h bpo-35134: Split warnings.h and weakrefobject.h (GH-29042) 2021-10-19 01:31:57 +02:00
weakrefobject.h gh-87347: Add parenthesis around PyXXX_Check() arguments (#92815) 2022-06-16 13:49:43 +02:00

README.rst 

The Python C API
================

The C API is divided into these sections:

1. ``Include/``: Limited API
2. ``Include/cpython/``: CPython implementation details
3. ``Include/cpython/``, names with the ``PyUnstable_`` prefix: API that can
   change between minor releases
4. ``Include/internal/``, and any name with ``_`` prefix: The internal API

Information on changing the C API is available `in the developer guide`_

.. _in the developer guide: https://devguide.python.org/c-api/