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cpython/Include/internal
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Sam Gross 052cb717f5
gh-124878: Fix race conditions during interpreter finalization (#130649) 
The PyThreadState field gains a reference count field to avoid
issues with PyThreadState being a dangling pointer to freed memory.
The refcount starts with a value of two: one reference is owned by the
interpreter's linked list of thread states and one reference is owned by
the OS thread. The reference count is decremented when the thread state
is removed from the interpreter's linked list and before the OS thread
calls `PyThread_hang_thread()`. The thread that decrements it to zero
frees the `PyThreadState` memory.

The `holds_gil` field is moved out of the `_status` bit field, to avoid
a data race where on thread calls `PyThreadState_Clear()`, modifying the
`_status` bit field while the OS thread reads `holds_gil` when
attempting to acquire the GIL.

The `PyThreadState.state` field now has `_Py_THREAD_SHUTTING_DOWN` as a
possible value. This corresponds to the `_PyThreadState_MustExit()`
check. This avoids race conditions in the free threading build when
checking `_PyThreadState_MustExit()`.
2025-03-06 10:38:34 -05:00
..
mimalloc gh-125444: Fix illegal instruction for older Arm architectures (#125574) 2024-10-16 09:13:07 -04:00
pycore_abstract.h
pycore_asdl.h
pycore_ast.h gh-130139: always check ast node type in ast.parse() with ast input (#130140) 2025-02-16 13:32:39 +00:00
pycore_ast_state.h gh-116126: Implement PEP 696 (#116129) 2024-05-03 06:17:32 -07:00
pycore_atexit.h gh-126907: make atexit thread safe in free-threading (#127935) 2024-12-16 19:31:44 +00:00
pycore_audit.h gh-125604: Move _Py_AuditHookEntry, etc. Out of pycore_runtime.h (gh-125605) 2024-10-18 09:26:08 -06:00
pycore_backoff.h GH-126795: Increase the JIT side-exit threshold from 64 to 4096 (GH-127155) 2024-12-04 15:01:28 -08:00
pycore_bitutils.h
pycore_blocks_output_buffer.h
pycore_brc.h gh-110481: Implement inter-thread queue for biased reference counting (#114824) 2024-02-09 17:08:32 -05:00
pycore_bytes_methods.h gh-117431: Adapt bytes and bytearray .find() and friends to Argument Clinic (#117502) 2024-04-12 07:40:55 +00:00
pycore_bytesobject.h gh-121489: Export private _PyBytes_Join() again (#122267) 2024-07-25 17:31:30 +02:00
pycore_call.h gh-120686: remove unused internal c api functions (#120687) 2024-06-27 11:09:30 +01:00
pycore_capsule.h
pycore_cell.h gh-117323: Make cell thread-safe in free-threaded builds (#117330) 2024-03-29 13:35:43 -04:00
pycore_ceval.h GH-130396: Use computed stack limits on linux (GH-130398) 2025-02-25 09:24:48 +00:00
pycore_ceval_state.h gh-118518: Allow perf to work without frame pointers (#112254) 2024-05-05 03:07:29 +02:00
pycore_code.h docs: internal notes have moved, correct references (#130762) 2025-03-03 06:38:49 -05:00
pycore_codecs.h gh-124665: Add _PyCodec_UnregisterError and _codecs._unregister_error (#124677) 2024-09-29 02:25:23 +02:00
pycore_compile.h gh-123969: refactor _PyErr_RaiseSyntaxError and _PyErr_EmitSyntaxWarning out of compiler (#123972) 2024-09-16 15:05:00 +01:00
pycore_complexobject.h
pycore_condvar.h gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
pycore_context.h gh-119333: Add C api to have contextvar enter/exit callbacks (#119335) 2024-09-23 20:40:17 -07:00
pycore_critical_section.h gh-114203: Optimise simple recursive critical sections (#128126) 2024-12-23 13:31:33 +01:00
pycore_crossinterp.h gh-76785: Improved Subinterpreters Compatibility with 3.12 (2/2) (gh-126707) 2024-11-12 10:41:51 -07:00
pycore_crossinterp_data_registry.h gh-76785: Improved Subinterpreters Compatibility with 3.12 (2/2) (gh-126707) 2024-11-12 10:41:51 -07:00
pycore_debug_offsets.h gh-129223: Do not allow the compiler to optimise away symbols for debug sections (#129225) 2025-01-24 21:36:32 +01:00
pycore_descrobject.h
pycore_dict.h gh-128923: Use zero to indicate unassigned unique id (#128925) 2025-01-17 16:42:27 +01:00
pycore_dict_state.h gh-124296: Remove private dictionary version tag (PEP 699) (#124472) 2024-10-01 12:39:56 -04:00
pycore_dtoa.h gh-119447: Fix build with _PY_SHORT_FLOAT_REPR == 0 (#121178) 2024-06-30 11:40:40 +02:00
pycore_emscripten_signal.h
pycore_emscripten_trampoline.h gh-128627: Emscripten: Use wasm-gc based call adaptor if available (#128628) 2025-01-13 07:09:39 +08:00
pycore_exceptions.h gh-129668: Fix thread-safety of MemoryError freelist in free threaded build (gh-129704) 2025-02-06 12:38:12 -05:00
pycore_faulthandler.h
pycore_fileutils.h gh-118422: Fix run_fileexflags() test (#118429) 2024-04-30 22:32:55 +02:00
pycore_fileutils_windows.h
pycore_floatobject.h gh-69639: Add mixed-mode rules for complex arithmetic (C-like) (GH-124829) 2024-11-26 17:57:39 +02:00
pycore_flowgraph.h gh-119744: move a few functions from compile.c to flowgraph.c (#119745) 2024-05-30 21:55:06 +01:00
pycore_format.h
pycore_frame.h gh-129236: Use stackpointer in free threaded GC (#129240) 2025-01-29 10:40:51 -05:00
pycore_freelist.h gh-127879: Fix data race in _PyFreeList_Push (#127880) 2024-12-12 12:59:13 -05:00
pycore_freelist_state.h gh-126703: Add freelists for list and tuple iterators (GH-128592) 2025-01-29 09:15:24 +00:00
pycore_function.h gh-115999: Stop the world when invalidating function versions (#124997) 2024-10-08 10:04:35 -04:00
pycore_gc.h gh-128807: Add marking phase for free-threaded cyclic GC (gh-128808) 2025-01-15 11:27:28 -08:00
pycore_genobject.h gh-120834: fix type of *_iframe field in _PyGenObject_HEAD declaration (#120835) 2024-06-24 10:23:38 +01:00
pycore_getopt.h
pycore_gil.h gh-116322: Enable the GIL while loading C extension modules (#118560) 2024-05-06 23:07:23 -04:00
pycore_global_objects.h gh-129701: Fix a data race in intern_common in the free threaded build (GH-130089) 2025-02-17 14:15:40 +01:00
pycore_global_objects_fini_generated.h GH-126833: Dumps graphviz representation of executor graph. (GH-126880) 2024-12-13 11:00:00 +00:00
pycore_global_strings.h GH-126833: Dumps graphviz representation of executor graph. (GH-126880) 2024-12-13 11:00:00 +00:00
pycore_hamt.h
pycore_hashtable.h
pycore_import.h gh-128911: Add PyImport_ImportModuleAttr() function (#128912) 2025-01-30 11:17:29 +00:00
pycore_importdl.h gh-122907: Fix Builds Without HAVE_DYNAMIC_LOADING Set (gh-122952) 2024-08-13 14:44:57 -06:00
pycore_index_pool.h gh-115999: Implement thread-local bytecode and enable specialization for BINARY_OP (#123926) 2024-11-04 11:13:32 -08:00
pycore_initconfig.h gh-107954, PEP 741: Add PyConfig_Get()/Set() functions (#123472) 2024-09-02 23:25:08 +02:00
pycore_instruction_sequence.h gh-121404: split compile.c into compile.c and codegen.c (#123651) 2024-09-09 18:21:51 +01:00
pycore_instruments.h GH-128375: Better instrument for FOR_ITER (GH-128445) 2025-01-06 17:54:47 +00:00
pycore_interp.h GH-127705: better double free message. (GH-130785) 2025-03-05 14:00:42 +00:00
pycore_intrinsics.h gh-116126: Implement PEP 696 (#116129) 2024-05-03 06:17:32 -07:00
pycore_jit.h gh-117139: Convert the evaluation stack to stack refs (#118450) 2024-06-27 03:10:43 +08:00
pycore_list.h GH-128682: Change a couple of functions to only steal references on success. (GH-129132) 2025-01-22 10:51:37 +00:00
pycore_llist.h gh-111964: Implement stop-the-world pauses (gh-112471) 2024-01-23 11:08:23 -07:00
pycore_lock.h gh-128002: use per threads tasks linked list in asyncio (#128869) 2025-02-06 19:51:07 +01:00
pycore_long.h gh-126835: Move constant subscript folding to CFG (#129568) 2025-02-04 10:10:55 +02:00
pycore_magic_number.h gh-130574: renumber RESUME opcode from 149 to 128 (GH-130685) 2025-03-06 08:59:36 +00:00
pycore_memoryobject.h
pycore_mimalloc.h gh-122584: Import mimalloc headers in a C++ context (#122587) 2024-08-15 09:01:01 -04:00
pycore_modsupport.h gh-112136: Remove unused #include "pycore_lock.h" (#127093) 2024-11-21 13:50:11 +01:00
pycore_moduleobject.h gh-123930: Better error for "from imports" when script shadows module (#123929) 2024-10-24 12:11:12 -07:00
pycore_namespace.h
pycore_object.h gh-130202: Fix bug in _PyObject_ResurrectEnd in free threaded build (gh-130281) 2025-02-25 12:03:28 -05:00
pycore_object_alloc.h gh-112529: Use GC heaps for GC allocations in free-threaded builds (gh-114157) 2024-01-21 01:14:45 +09:00
pycore_object_deferred.h gh-117139: Convert the evaluation stack to stack refs (#118450) 2024-06-27 03:10:43 +08:00
pycore_object_stack.h gh-125859: Fix crash when gc.get_objects is called during GC (#125882) 2024-10-24 09:33:11 -04:00
pycore_object_state.h gh-125604: Move _Py_AuditHookEntry, etc. Out of pycore_runtime.h (gh-125605) 2024-10-18 09:26:08 -06:00
pycore_obmalloc.h gh-92953: Improve nextpool/prevpool comment. (gh-125545) 2024-10-15 11:47:20 -07:00
pycore_obmalloc_init.h gh-113055: Use pointer for interp->obmalloc state (gh-113412) 2024-01-26 19:38:14 -08:00
pycore_opcode_metadata.h gh-130574: renumber RESUME opcode from 149 to 128 (GH-130685) 2025-03-06 08:59:36 +00:00
pycore_opcode_utils.h GH-122548: Implement branch taken and not taken events for sys.monitoring (GH-122564) 2024-12-19 16:59:51 +00:00
pycore_optimizer.h GH-130415: Use boolean guards to narrow types to values in the JIT (GH-130659) 2025-03-02 13:21:34 -08:00
pycore_parking_lot.h gh-110850: Cleanup pycore_time.h includes (#115724) 2024-02-20 16:50:43 +00:00
pycore_parser.h gh-122581: Avoid data races when collecting parser statistics (#122694) 2024-08-06 13:29:57 +02:00
pycore_pathconfig.h
pycore_pyarena.h
pycore_pyatomic_ft_wrappers.h gh-117657: TSAN Fix races in PyMember_Get and PyMember_Set for C extensions (GH-123211) 2024-12-03 09:41:53 -05:00
pycore_pybuffer.h gh-76785: Rename _xxsubinterpreters to _interpreters (gh-117791) 2024-04-24 16:18:24 +00:00
pycore_pyerrors.h gh-127787: allow retrieving the clipped slice length in _PyUnicodeError_GetParams (GH-128980) 2025-01-21 11:45:53 +01:00
pycore_pyhash.h gh-122854: Add Py_HashBuffer() function (#122855) 2024-08-30 15:42:27 +00:00
pycore_pylifecycle.h gh-128130: Fix unhandled keyboard interrupt data race (gh-129975) 2025-02-13 12:29:03 -05:00
pycore_pymath.h gh-120026: soft deprecate Py_HUGE_VAL macro (#120027) 2024-11-01 22:04:31 +00:00
pycore_pymem.h gh-130519: Fix crash in QSBR when destructor reenters QSBR (gh-130553) 2025-02-26 14:55:15 -05:00
pycore_pymem_init.h gh-115103: Implement delayed free mechanism for free-threaded builds (#115367) 2024-02-20 13:04:37 -05:00
pycore_pystate.h gh-124878: Fix race conditions during interpreter finalization (#130649) 2025-03-06 10:38:34 -05:00
pycore_pystats.h
pycore_pythonrun.h
pycore_pythread.h gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) 2024-10-02 09:17:49 -07:00
pycore_qsbr.h gh-117657: Fix QSBR race condition (#118843) 2024-05-10 10:26:35 -04:00
pycore_range.h
pycore_runtime.h gh-130421: Fix data race on timebase initialization (gh-130592) 2025-02-27 13:27:54 +00:00
pycore_runtime_init.h gh-124878: Fix race conditions during interpreter finalization (#130649) 2025-03-06 10:38:34 -05:00
pycore_runtime_init_generated.h GH-126833: Dumps graphviz representation of executor graph. (GH-126880) 2024-12-13 11:00:00 +00:00
pycore_semaphore.h gh-110850: Cleanup pycore_time.h includes (#115724) 2024-02-20 16:50:43 +00:00
pycore_setobject.h gh-118527: Intern code consts in free-threaded build (#118667) 2024-05-06 20:12:39 -04:00
pycore_signal.h
pycore_sliceobject.h GH-115802: JIT "small" code for Windows (GH-115964) 2024-02-29 08:11:28 -08:00
pycore_stackref.h GH-127705: better double free message. (GH-130785) 2025-03-05 14:00:42 +00:00
pycore_strhex.h
pycore_structseq.h
pycore_symtable.h GH-130396: Use computed stack limits on linux (GH-130398) 2025-02-25 09:24:48 +00:00
pycore_sysmodule.h gh-130163: Fix crashes related to PySys_GetObject() (GH-130503) 2025-02-25 23:04:27 +02:00
pycore_time.h gh-130421: Fix data race on timebase initialization (gh-130592) 2025-02-27 13:27:54 +00:00
pycore_token.h
pycore_traceback.h gh-130790: Remove references about unicode's readiness from comments (#130801) 2025-03-03 19:18:09 +00:00
pycore_tracemalloc.h gh-129185: Use PyMutex in tracemalloc (#129246) 2025-01-24 11:25:24 +01:00
pycore_tstate.h gh-124878: Fix race conditions during interpreter finalization (#130649) 2025-03-06 10:38:34 -05:00
pycore_tuple.h GH-128682: Change a couple of functions to only steal references on success. (GH-129132) 2025-01-22 10:51:37 +00:00
pycore_typeobject.h gh-115999: Enable BINARY_SUBSCR_GETITEM for free-threaded build (gh-127737) 2024-12-19 11:08:17 +09:00
pycore_typevarobject.h gh-119180: Add evaluate functions for type params and type aliases (#122212) 2024-07-27 17:24:10 +00:00
pycore_ucnhash.h
pycore_unicodeobject.h gh-87790: support thousands separators for formatting fractional part of floats (#125304) 2025-02-25 16:27:07 +01:00
pycore_unicodeobject_generated.h GH-126833: Dumps graphviz representation of executor graph. (GH-126880) 2024-12-13 11:00:00 +00:00
pycore_unionobject.h gh-105499: Merge typing.Union and types.UnionType (#105511) 2025-03-04 11:44:19 -08:00
pycore_uniqueid.h gh-128923: Use zero to indicate unassigned unique id (#128925) 2025-01-17 16:42:27 +01:00
pycore_uop_ids.h GH-130296: Avoid stack transients in four instructions. (GH-130310) 2025-02-28 18:00:38 +00:00
pycore_uop_metadata.h gh-118331: Fix a couple of issues when list allocation fails (#130811) 2025-03-05 10:42:09 -08:00
pycore_warnings.h gh-128384: Add locking to warnings.py. (gh-128386) 2025-01-14 11:43:42 -08:00
pycore_weakref.h gh-118789: Add PyUnstable_Object_ClearWeakRefsNoCallbacks (#118807) 2024-06-18 09:57:23 -04:00