cpython

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Sam Gross 1b2301c009 [3.13] gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852) (#148885 )

_PyRawMutex_UnlockSlow CAS-removes the waiter from the list and then
calls _PySemaphore_Wakeup, with no handshake. If _PySemaphore_Wait
returns Py_PARK_INTR, the waiter can destroy its stack-allocated
semaphore before the unlocker's Wakeup runs, causing a fatal error from
ReleaseSemaphore / sem_post.

Loop in _PyRawMutex_LockSlow until _PySemaphore_Wait returns Py_PARK_OK,
which is only signalled when a matching Wakeup has been observed.

Also include GetLastError() and the handle in the Windows fatal messages
in _PySemaphore_Init, _PySemaphore_Wait, and _PySemaphore_Wakeup to make
similar races easier to diagnose in the future.

(cherry picked from commit ad3c5b7958)

2026-04-22 18:56:24 +00:00

clinic

[3.13] gh-139748: fix leaks in AC error paths when using unicode FS-b… (#139792 )

2025-10-08 22:21:49 +05:30

frozen_modules

gh-97669: Create Tools/build/ directory (#97963 )

2022-10-17 12:01:00 +02:00

_warnings.c

[3.13] gh-139640: Fix swallowing syntax warnings in different modules (GH-139755) (GH-140119)

2025-10-14 15:46:11 +00:00

adaptive.md

GH-98686: Get rid of "adaptive" and "quick" instructions (GH-99182)

2022-11-09 10:50:09 -08:00

asdl.c

…

asm_trampoline.S

[3.13] gh-136541: Fix several problems of perf trampolines in x86_64 and aarch64 (GH-136500) (#136545 )

2025-07-11 14:02:19 +00:00

assemble.c

[3.13] gh-130775: Allow negative locations in ast (GH-130795) (#132243 )

2025-04-08 10:47:24 +02:00

ast_opt.c

[3.13] gh-123344: Add missing ast optimizations for PEP 696 (GH-123377) (#123427 )

2024-08-28 14:02:34 +00:00

ast_unparse.c

[3.13] gh-125268: Use static string for "1e309" in AST (GH-125272) (GH-125280)

2024-10-24 13:59:23 -04:00

ast.c

gh-116126: Implement PEP 696 (#116129 )

2024-05-03 06:17:32 -07:00

bltinmodule.c

[3.13] gh-146615: Fix format specifiers in Python/ directory (GH-146619) (GH-146654)

2026-03-31 09:16:44 +00:00

bootstrap_hash.c

gh-110014: Fix bootstrap_hash.c: remove debug code (#110161 )

2023-09-30 22:21:20 +00:00

brc.c

gh-110481: Fix biased reference counting queue initialization. (#117271 )

2024-03-28 09:28:39 -04:00

bytecodes.c

[3.13] gh-145008: Maintain stack consistency in CALL_BOUND_METHOD_EXACT_ARGS (GH-145015)

2026-03-03 04:09:02 +08:00

ceval_gil.c

[3.13] gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) (GH-137827)

2025-08-17 09:08:14 -07:00

ceval_macros.h

[3.13] gh-117657: Avoid race in PAUSE_ADAPTIVE_COUNTER in free-threaded build (GH-122190) (#122475 )

2024-07-30 18:18:25 +00:00

ceval.c

[3.13] gh-146615: Fix format specifiers in Python/ directory (GH-146619) (GH-146654)

2026-03-31 09:16:44 +00:00

codecs.c

[3.13] gh-58124: Avoid CP_UTF8 in UnicodeDecodeError (GH-137415) (#137461 )

2025-08-06 12:59:11 +00:00

compile.c

[3.13] gh-139640: Fix swallowing syntax warnings in different modules (GH-139755) (GH-140119)

2025-10-14 15:46:11 +00:00

condvar.h

gh-104530: Enable native Win32 condition variables by default (GH-104531)

2024-02-02 13:50:51 +00:00

config_common.h

gh-76785: Add PyInterpreterConfig Helpers (gh-117170)

2024-04-02 20:35:52 +00:00

context.c

[3.13] gh-142873: Do not check for PyContextVar_CheckExact twice in PyContextVar_Set (GH-142874) (#142894 )

2025-12-17 17:04:39 +00:00

critical_section.c

[3.13] gh-119344: Make critical section API public (GH-119353) (#120856 )

2024-06-21 20:20:41 +00:00

crossinterp_data_lookup.h

gh-76785: Improved Subinterpreters Compatibility with 3.12 (gh-115424)

2024-02-13 14:56:49 -07:00

crossinterp_exceptions.h

[3.13] gh-117398: Use Per-Interpreter State for the _datetime Static Types (gh-120009)

2024-06-03 23:37:28 +00:00

crossinterp.c

[3.13] gh-140306: Clear uncaught exception info after applying error in subinterpreter (GH-140397)

2026-01-12 18:19:57 +02:00

dtoa.c

gh-91565: Replace bugs.python.org links with Devguide/GitHub ones (GH-91568)

2024-04-01 13:02:07 +00:00

dup2.c

gh-108765: Python.h no longer includes <unistd.h> (#108783 )

2023-09-02 16:50:18 +02:00

dynamic_annotations.c

…

dynload_hpux.c

gh-88402: Add new sysconfig variables on Windows (GH-110049)

2023-10-04 22:50:29 +00:00

dynload_shlib.c

gh-88402: Add new sysconfig variables on Windows (GH-110049)

2023-10-04 22:50:29 +00:00

dynload_stub.c

gh-88402: Add new sysconfig variables on Windows (GH-110049)

2023-10-04 22:50:29 +00:00

dynload_win.c

gh-88402: Add new sysconfig variables on Windows (GH-110049)

2023-10-04 22:50:29 +00:00

emscripten_signal.c

GH-108614: Unbreak emscripten build (GH-109132)

2023-09-08 17:54:45 +01:00

emscripten_trampoline.c

[3.13] gh-121698 Emscripten: Use updated WebAssembly type reflection proposal (GH-121699) (GH-121745)

2024-07-14 12:01:03 +02:00

errors.c

[3.13] gh-143547: Fix PyErr_FormatUnraisable() fallback (GH-143557) (GH-143603) (#143612 )

2026-01-09 15:33:25 +00:00

executor_cases.c.h

[3.13] gh-132744: Check recursion limit in _PY_FRAME_GENERAL (GH-132746) (GH-138032)

2025-08-22 20:25:24 +08:00

fileutils.c

[3.13] gh-124476: Fix decoding from the locale encoding in the C.UTF-8 locale (GH-132477) (ПР-132528)

2025-04-14 18:59:07 +00:00

flowgraph.c

[3.13] gh-130740: Move some stdbool.h includes after Python.h (#130738 ) (#130756 )

2025-03-03 13:09:59 +01:00

formatter_unicode.c

gh-92536: Remove PyUnicode_READY() calls (#105210 )

2023-06-02 01:33:17 +02:00

frame.c

gh-118272: set stacktop to 0 before freeing contents, to avoid access to invalid objects during GC (#118478 )

2024-05-01 21:51:40 +01:00

frozen.c

gh-108716: Cleanup remaining deepfreeze infrastructure (#116919 )

2024-03-18 11:13:11 -07:00

frozenmain.c

gh-105716: Fix _PyInterpreterState_IsRunningMain() For Embedders (gh-117140)

2024-03-21 18:20:20 -06:00

future.c

[3.13] gh-126139: Improve error message location for future statement with unknown feature (GH-126140) (#126155 )

2024-10-30 00:36:06 +00:00

gc_free_threading.c

[3.13] GH-91636: Clear weakrefs created by finalizers. (GH-136401) (GH-144214)

2026-03-24 00:50:41 +01:00

gc_gil.c

gh-111968: Rename freelist related struct names to Eric's suggestion (gh-115329)

2024-02-14 00:32:51 +00:00

gc.c

[3.13] GH-91636: Clear weakrefs created by finalizers. (GH-136401) (GH-144214)

2026-03-24 00:50:41 +01:00

generated_cases.c.h

[3.13] gh-145008: Maintain stack consistency in CALL_BOUND_METHOD_EXACT_ARGS (GH-145015)

2026-03-03 04:09:02 +08:00

getargs.c

[3.13] gh-146615: Fix format specifiers in Objects/ directory (GH-146620) (#147705 )

2026-04-01 21:52:14 +00:00

getcompiler.c

…

getcopyright.c

Update copyright years to 2024. (GH-113608)

2024-01-16 21:54:05 +01:00

getopt.c

gh-110079: Remove extern "C" { ...} in C code (#110080 )

2023-09-29 10:56:49 +02:00

getplatform.c

…

getversion.c

[3.13] gh-119132: Update sys.version to identify free-threaded or not. (gh-119134) (#119153 )

2024-05-18 16:49:11 -04:00

hamt.c

[3.13] gh-142829: Fix use-after-free in Context.__eq__ via re-entrant ContextVar.set (GH-142905) (GH-143871)

2026-01-15 15:00:44 +00:00

hashtable.c

gh-111545: Add Py_HashPointer() function (#112096 )

2023-12-06 15:09:22 +01:00

import.c

[3.13] gh-144601: Avoid sharing exception objects raised in a PyInit function across multiple interpreters (GH-144602) (GH-144880)

2026-02-16 16:05:55 +00:00

importdl.c

[3.13] gh-140011: Delete importdl assertion that prevents importing embedded modules from packages (GH-141605) (#141987 )

2025-11-28 23:31:11 -08:00

initconfig.c

[3.13] gh-146244: Fix initconfig.c SET_ITEM macro leaks dict on expression failure (GH-146246) (GH-146433)

2026-03-25 19:32:20 +00:00

instruction_sequence.c

[3.13] gh-130740: Move some stdbool.h includes after Python.h (#130738 ) (#130756 )

2025-03-03 13:09:59 +01:00

instrumentation.c

[3.13] gh-120158: Fix inconsistent monitoring state when setting events too frequently (gh-141845) (gh-141880)

2025-11-23 15:30:37 +00:00

interpconfig.c

[3.13] gh-146615: Fix format specifiers in Python/ directory (GH-146619) (GH-146654)

2026-03-31 09:16:44 +00:00

intrinsics.c

[3.13] gh-130163: Fix crashes related to PySys_GetObject() (GH-130503) (GH-130556)

2025-02-25 22:50:26 +00:00

jit.c

[3.13] GH-146128: Remove the buggy AArch64 "33rx" relocation (#146263 ) (#148199 )

2026-04-07 20:10:33 +02:00

legacy_tracing.c

[3.13] gh-137400: Fix thread-safety issues when profiling all threads (gh-137518) (gh-137733)

2025-10-09 11:42:47 -04:00

lock.c

[3.13] gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852) (#148885 )

2026-04-22 18:56:24 +00:00

marshal.c

[3.13] gh-148653: Fix some marshal errors related to recursive code objects (GH-148698) (GH-148711) (GH-148713)

2026-04-18 09:29:38 +00:00

modsupport.c

[3.13] gh-132909: handle overflow for 'K' format in do_mkvalue (GH-132911) (#132932 )

2025-04-25 12:44:53 +00:00

mysnprintf.c

Add a warning message about PyOS_snprintf (#95993 )

2022-10-07 11:49:53 -07:00

mystrtoul.c

gh-108765: Python.h no longer includes <ctype.h> (#108831 )

2023-09-03 18:54:27 +02:00

object_stack.c

gh-111968: Split _Py_dictkeys_freelist out of _Py_dict_freelist (gh-115505)

2024-02-16 01:01:36 +00:00

opcode_targets.h

GH-118095: Use broader specializations of CALL in tier 1, for better tier 2 support of calls. (GH-118322)

2024-05-04 12:11:11 +01:00

optimizer_analysis.c

[3.13] gh-120642: Move private PyCode APIs to the internal C API (#120643 ) (#121043 )

2024-06-26 15:35:19 +02:00

optimizer_bytecodes.c

[3.13] gh-119258: Backport optimizer frame fixes in GH-119365 (GH-120699)

2024-06-20 23:55:20 +08:00

optimizer_cases.c.h

[3.13] gh-132744: Check recursion limit in _PY_FRAME_GENERAL (GH-132746) (GH-138032)

2025-08-22 20:25:24 +08:00

optimizer_symbols.c

[3.13] gh-120642: Move private PyCode APIs to the internal C API (#120643 ) (#121043 )

2024-06-26 15:35:19 +02:00

optimizer.c

[3.13] gh-120642: Move private PyCode APIs to the internal C API (#120643 ) (#121043 )

2024-06-26 15:35:19 +02:00

parking_lot.c

[3.13] gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852) (#148885 )

2026-04-22 18:56:24 +00:00

pathconfig.c

gh-117987: Restore several functions removed in Python 3.13 alpha 1 (GH-117993)

2024-04-18 15:20:38 +02:00

perf_jit_trampoline.c

[3.13] gh-144194: Fix mmap failure check in perf_jit_trampoline.c (#143713 ) (#144304 )

2026-01-28 14:15:39 +00:00

perf_trampoline.c

[3.13] gh-144766: Fix a crash in fork child process when perf support is enabled. (GH-144795) (#144818 )

2026-02-14 17:52:42 +00:00

preconfig.c

[3.13] gh-145092: Fix compiler warning for memchr() and wcschr() returning const pointer (GH-145093) (GH-145101)

2026-02-22 08:28:24 +00:00

pyarena.c

…

pyctype.c

…

pyfpe.c

bpo-46315: Add ifdef HAVE_ feature checks for WASI compatibility (GH-30507)

2022-01-13 09:46:04 +01:00

pyhash.c

[3.13] gh-111389: Add PyHASH_MULTIPLIER constant (GH-119214) (#119334 )

2024-06-04 09:26:25 +02:00

pylifecycle.c

[3.13] gh-144307: Fix a reference leak during module teardown (GH-144308) (GH-144328)

2026-01-29 19:18:39 +00:00

pymath.c

…

pystate.c

[3.13] gh-142183: Cache one datachunk per tstate to prevent alloc/dealloc thrashing (GH-145789) (#146123 )

2026-03-24 02:27:57 +01:00

pystrcmp.c

gh-108767: Replace ctype.h functions with pyctype.h functions (#108772 )

2023-09-01 18:36:53 +02:00

pystrhex.c

[3.13] gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548) (#142304 )

2025-12-05 15:52:12 +00:00

pystrtod.c

gh-108765: Cleanup #include in Python/*.c files (#108977 )

2023-09-06 15:56:08 +02:00

Python-ast.c

[3.13] gh-144169: Fix three crashes in AST objects with non-str kwargs (GH-144178) (#144260 )

2026-01-27 20:37:35 -08:00

Python-tokenize.c

[3.13] gh-120317: Lock around global state in the tokenize module (GH-120318) (#121841 )

2024-07-16 10:03:47 +00:00

pythonrun.c

[3.13] gh-146615: Fix format specifiers in Python/ directory (GH-146619) (GH-146654)

2026-03-31 09:16:44 +00:00

pytime.c

gh-110850: Remove _PyTime_TimeUnchecked() function (#118552 )

2024-05-05 12:15:19 +02:00

qsbr.c

[3.13] GH-133136: Revise QSBR to reduce excess memory held (gh-135473) (gh-136480)

2025-07-30 11:06:44 -07:00

README

…

specialize.c

[3.13] gh-125610: Fix STORE_ATTR_INSTANCE_VALUE specialization check (GH-125612) (GH-127698)

2024-12-06 16:14:26 +00:00

stdlib_module_names.h

[3.13] gh-126925: Modify how iOS test results are gathered (GH-127592) (#127754 )

2024-12-09 14:39:11 +08:00

structmember.c

[3.13] gh-117657: Fix __slots__ thread safety in free-threaded build (GH-119368) (#120655 )

2024-06-17 19:12:25 +00:00

suggestions.c

gh-113845: Fix a compiler warning in Python/suggestions.c (GH-113949)

2024-01-11 20:31:24 +02:00

symtable.c

[3.13] gh-145701: Fix __classdict__ & __conditional_annotations__ in class-scope inlined comprehensions (GH-145702) (#145711 )

2026-03-09 14:44:31 -07:00

sysmodule.c

[3.13] gh-142571: Check for errors before calling each syscall in PyUnstable_CopyPerfMapFile() (GH-142460) (#142602 )

2025-12-11 22:08:08 +00:00

thread_nt.h

[3.13] gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) (GH-137827)

2025-08-17 09:08:14 -07:00

thread_pthread_stubs.h

GH-110829: Ensure Thread.join() joins the OS thread (#110848 )

2023-11-04 13:59:24 +00:00

thread_pthread.h

[3.13] gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) (GH-137827)

2025-08-17 09:08:14 -07:00

thread.c

gh-110850: Cleanup PyTime API: PyTime_t are nanoseconds (#115753 )

2024-02-21 11:46:00 +01:00

tier2_engine.md

Docs: fix spelling of the word 'transferring' (#116641 )

2024-03-13 23:53:32 +01:00

traceback.c

[3.13] gh-142737: Handle lost io.open in _Py_FindSourceFile (GH-142747) (GH-142774)

2025-12-15 23:27:15 +00:00

tracemalloc.c

[3.13] gh-128679: Clear the ref tracer in _PyTraceMalloc_Stop() (#129258 )

2025-01-24 14:54:02 +01:00

vm-state.md

High level docs for the VM state (#111621 )

2023-11-01 22:55:10 +00:00

README

Miscellaneous source files for the main Python shared library