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3.15
cpython/Include/internal
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Neil SchemenauerandGitHub fa427cbdee [3.15] gh-158195: Do not hold the type lock during stop-the-world (gh-159972) (gh-160987) 
Fixes the free-threaded deadlock described in gh-158195 by removing
type-lock pinning. The type lock and class dict lock can now be released
normally while a thread waits to stop the world, rather than remaining
pinned across that wait.

For 3.15 backport, avoid changing the default build behavior.  The 
following changes are now only for the free-threaded build:

- fresh __bases__ tuple copying
- type_new_copy_dict() and namespace-key normalization
- addition of the new exact-Unicode dictionary helpers

In the default build, you can still create a type with string-subclass
keys.
2026-11-07 12:54:40 -07:00
..
mimalloc
[3.15] gh-159111: Update vendored mimalloc to v2.5.2 (gh-159112) (gh-160178)
2026-10-22 09:55:05 -07:00
pycore_abstract.h
GH-143732: SEND specialization (GH-148963)
2026-05-05 15:19:16 +01:00
pycore_asdl.h
…
pycore_ast_state.h
gh-116021: Deprecate support for instantiating abstract AST nodes (#137865)
2026-05-02 09:50:06 -07:00
pycore_ast.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_atexit.h
…
pycore_audit.h
…
pycore_backoff.h
[3.15] gh-129752: Don't update adaptive counters when TLBC=0 in free-threading. (gh-155497) (#155647)
2026-08-26 14:52:45 +09:00
pycore_bitutils.h
…
pycore_blocks_output_buffer.h
gh-148688: Fix _BlocksOutputBuffer_Finish() double free (#148689)
2026-04-18 09:56:56 +00:00
pycore_brc.h
…
pycore_bytes_methods.h
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pycore_bytesobject.h
[3.15] gh-157242: Fix PyBytesWriter_Resize() on MemoryError (#157243) (#159260)
2026-10-13 00:18:42 +02:00
pycore_c_array.h
…
pycore_call.h
gh-148659: Export some internal functions for the JIT (PEP-523) (#148634)
2026-04-17 01:55:03 +02:00
pycore_capsule.h
…
pycore_cell.h
gh-144490: Fix C++ compatibility in pycore_cell.h (GH-144482)
2026-02-06 22:11:58 -05:00
pycore_ceval_state.h
…
pycore_ceval.h
GH-126910: Add gdb support for unwinding JIT frames (#146071)
2026-05-02 13:42:03 +00:00
pycore_code.h
[3.15] gh-155363: Fix QSBR slot leak on thread state creation failure (gh-155365) (#155579)
2026-08-22 12:39:14 +03:00
pycore_codecs.h
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pycore_compile.h
[3.15] gh-156459: Fix cleanup on error in compiler_set_qualname (GH-156462) (GH-156574)
2026-10-10 13:58:08 +03:00
pycore_complexobject.h
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pycore_condvar.h
…
pycore_context.h
…
pycore_critical_section.h
[3.15] gh-150902: Optimize PyCriticalSection2 to skip locking the same locks held by the current CS2 (gh-151554)
2026-06-19 09:52:07 -04:00
pycore_crossinterp_data_registry.h
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pycore_crossinterp.h
gh-148072: Cache pickle.dumps/loads per interpreter in XIData (GH-148125)
2026-04-06 11:37:02 -04:00
pycore_debug_offsets.h
[3.15] gh-151613: Fix remote debugging frame cache ABA (#152448)
2026-06-27 17:42:31 +00:00
pycore_descrobject.h
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pycore_dict_state.h
[3.15] gh-145235: Make dict watcher API thread-safe for free-threaded builds (gh-145233) (#149690)
2026-05-11 14:23:39 -04:00
pycore_dict.h
[3.15] gh-158195: Do not hold the type lock during stop-the-world (gh-159972) (gh-160987)
2026-11-07 12:54:40 -07:00
pycore_dtoa.h
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pycore_emscripten_signal.h
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pycore_emscripten_trampoline.h
gh-145037: Fix Emscripten trampoline with emcc >= 4.0.19 (#145038)
2026-02-26 06:21:05 +08:00
pycore_exceptions.h
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pycore_faulthandler.h
gh-149085: Add max_threads keyword to faulthandler.dump_traceback() (GH-149106)
2026-04-30 09:27:57 -04:00
pycore_fileutils_windows.h
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pycore_fileutils.h
[3.15] gh-158893: Make os.strerror() thread-safe (#159120)
2026-10-10 22:08:49 +02:00
pycore_floatobject.h
gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634)
2026-03-11 12:39:24 +01:00
pycore_flowgraph.h
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pycore_format.h
…
pycore_frame.h
gh-148659: Export some internal functions for the JIT (PEP-523) (#148634)
2026-04-17 01:55:03 +02:00
pycore_freelist_state.h
…
pycore_freelist.h
…
pycore_function.h
gh-148659: Export some internal functions for the JIT (PEP-523) (#148634)
2026-04-17 01:55:03 +02:00
pycore_gc.h
[3.15] gh-150766: export _PyGC_VisitFrameStack and _PyGC_VisitStackRef functions (GH-150767) (#150787)
2026-06-02 13:36:52 +00:00
pycore_genobject.h
GH-143732: SEND specialization (GH-148963)
2026-05-05 15:19:16 +01:00
pycore_getopt.h
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pycore_gil.h
…
pycore_global_objects_fini_generated.h
[3.15] gh-154090: Store profiling mode and capture settings in binary profiles (GH-154105) (#158144)
2026-09-24 23:52:22 +00:00
pycore_global_objects.h
…
pycore_global_strings.h
[3.15] gh-154090: Store profiling mode and capture settings in binary profiles (GH-154105) (#158144)
2026-09-24 23:52:22 +00:00
pycore_hamt.h
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pycore_hashtable.h
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pycore_import.h
[3.15] gh-158140: Resolve lazily imported sibling submodules independently (GH-158521) (#158613)
2026-10-02 18:48:03 +00:00
pycore_importdl.h
gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055)
2026-05-05 09:18:04 +02:00
pycore_index_pool.h
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pycore_initconfig.h
…
pycore_instruction_sequence.h
…
pycore_instruments.h
gh-142186: Allow all PEP-669 events to be per-code object and disableable (GH-146182)
2026-04-22 09:08:23 +01:00
pycore_interp_structs.h
[3.15] Restore deferred backports for 3.15.1, including GH-158874 (#158882)
2026-10-11 15:42:59 +01:00
pycore_interp.h
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pycore_interpframe_structs.h
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pycore_interpframe.h
[3.15] gh-151613: Fix remote debugging frame cache ABA (#152448)
2026-06-27 17:42:31 +00:00
pycore_interpolation.h
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pycore_intrinsics.h
…
pycore_jit_publish.h
GH-126910: Add GNU backtrace support for unwinding JIT frames (#149104)
2026-05-05 09:29:07 +01:00
pycore_jit_unwind.h
[3.15] gh-149685: Use the _Py prefix for private C macros (GH-149686) (GH-149790)
2026-05-13 23:29:08 +02:00
pycore_jit.h
GH-126910: Add gdb support for unwinding JIT frames (#146071)
2026-05-02 13:42:03 +00:00
pycore_lazyimportobject.h
[3.15] gh-158140: Resolve lazily imported sibling submodules independently (GH-158521) (#158613)
2026-10-02 18:48:03 +00:00
pycore_list.h
gh-100239: Specialize more binary operations using BINARY_OP_EXTEND (GH-128956)
2026-04-16 09:22:41 +01:00
pycore_llist.h
…
pycore_lock.h
[3.15] gh-158973: Reset the warnings lock after fork in the child (gh-158974) (gh-159614)
2026-10-19 14:54:15 -07:00
pycore_long.h
gh-143050: Add helper _PyLong_InitTag() (#147956)
2026-04-01 21:42:10 +00:00
pycore_magic_number.h
GH-143732: SEND specialization (GH-148963)
2026-05-05 15:19:16 +01:00
pycore_memoryobject.h
…
pycore_mimalloc.h
[3.15] gh-159111: Update vendored mimalloc to v2.5.2 (gh-159112) (gh-160178)
2026-10-22 09:55:05 -07:00
pycore_mmap.h
[3.15] gh-149685: Use the _Py prefix for private C macros (GH-149686) (GH-149790)
2026-05-13 23:29:08 +02:00
pycore_modsupport.h
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pycore_moduleobject.h
gh-145921: Add "_DuringGC" functions for tp_traverse (GH-145925)
2026-04-08 09:15:11 +02:00
pycore_namespace.h
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pycore_object_alloc.h
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pycore_object_deferred.h
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pycore_object_stack.h
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pycore_object_state.h
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pycore_object.h
[3.15] gh-161419: fix weakref reviving a dying object in free-threading (GH-161431) (#161488)
2026-11-06 13:17:05 +00:00
pycore_obmalloc_init.h
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pycore_obmalloc.h
Note out-of-date obmalloc comments (#148149)
2026-04-06 23:08:47 -05:00
pycore_opcode_metadata.h
[3.15] gh-151818: Fix double-free in _CALL_LIST_APPEND on allocation failure (GH-151826) (#160200)
2026-10-22 06:23:06 -07:00
pycore_opcode_utils.h
gh-148871: extend and improve LOAD_COMMON_CONSTANT (GH-148971)
2026-05-02 19:59:51 +01:00
pycore_optimizer_types.h
[3.15] gh-157468: Validate correct builtins used under JIT (GH-157766) (GH-159048)
2026-10-12 16:31:15 +02:00
pycore_optimizer.h
[3.15] gh-154701: prevent executor self-links in JIT cold exits (GH-155323) (#155832)
2026-08-25 09:38:28 +09:00
pycore_parking_lot.h
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pycore_parser.h
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pycore_pathconfig.h
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pycore_pyarena.h
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pycore_pyatomic_ft_wrappers.h
[3.15] gh-158197: Fix split dict iteration during concurrent deletion (gh-158686) (#159953)
2026-10-20 17:03:22 -07:00
pycore_pybuffer.h
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pycore_pyerrors.h
[3.15] gh-150459: Fix SyntaxError message for from x lazy import y (GH-150877) (#153090)
2026-07-05 10:41:56 +00:00
pycore_pyhash.h
[3.15] gh-149018: Use XML_SetHashSalt16Bytes in pyexpat/_elementtree when possible (#149645)
2026-05-24 14:36:30 +01:00
pycore_pylifecycle.h
[3.15] gh-152132: Fix Py_RunMain() to return an exit code (GH-153446) (#153454)
2026-07-09 19:00:28 +00:00
pycore_pymath.h
gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634)
2026-03-11 12:39:24 +01:00
pycore_pymem_init.h
gh-144914: use mimalloc for raw allocations on free-threading (#144916)
2026-02-18 04:16:27 +00:00
pycore_pymem.h
…
pycore_pystate.h
[3.15] Fix _PyThreadState_ResumeDetached() assertion with attach waiters (GH-159372)
2026-10-13 12:43:19 -07:00
pycore_pystats.h
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pycore_pythonrun.h
[3.15] gh-152132: Test Py_CompileString() in test_capi.test_run (GH-153470) (#153472)
2026-07-10 02:07:38 +00:00
pycore_pythread.h
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pycore_qsbr.h
gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554)
2026-02-17 11:12:25 -05:00
pycore_range.h
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pycore_runtime_init_generated.h
[3.15] gh-154090: Store profiling mode and capture settings in binary profiles (GH-154105) (#158144)
2026-09-24 23:52:22 +00:00
pycore_runtime_init.h
GH-148726: Forward-port generational GC. (GH-148746)
2026-04-30 12:19:13 -07:00
pycore_runtime_structs.h
gh-146302: make Py_IsInitialized() thread-safe and reflect true init completion (GH-146303)
2026-04-11 21:54:23 +00:00
pycore_runtime.h
gh-146302: make Py_IsInitialized() thread-safe and reflect true init completion (GH-146303)
2026-04-11 21:54:23 +00:00
pycore_semaphore.h
…
pycore_setobject.h
…
pycore_signal.h
…
pycore_sliceobject.h
…
pycore_slots_generated.h
gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055)
2026-05-05 09:18:04 +02:00
pycore_slots.h
gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055)
2026-05-05 09:18:04 +02:00
pycore_stackref.h
gh-148718: Fix Py_STACKREF_DEBUG build by defining macros (#148719)
2026-04-20 21:55:03 +09:00
pycore_stats.h
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pycore_strhex.h
gh-147944: Increase range of bytes_per_sep (GH-147946)
2026-04-01 08:33:30 +00:00
pycore_structs.h
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pycore_structseq.h
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pycore_symtable.h
gh-137814: Fix __qualname__ of __annotate__ (#137842)
2026-04-15 21:52:30 -07:00
pycore_sysmodule.h
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pycore_template.h
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pycore_time.h
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pycore_token.h
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pycore_traceback.h
gh-145559: Add PyUnstable_DumpTraceback() and PyUnstable_DumpTracebackThreads() (#148145)
2026-05-06 15:01:12 +00:00
pycore_tracemalloc.h
[3.15] gh-155725: Remove PyGILState_Ensure usage from tracemalloc (GH-156409) (#156628)
2026-08-31 09:53:56 +03:00
pycore_tstate.h
[3.15] GH-158593: Fix ABI compatibility with earlier RCs (#158595)
2026-10-02 14:45:34 +03:00
pycore_tuple.h
gh-100239: Specialize more binary operations using BINARY_OP_EXTEND (GH-128956)
2026-04-16 09:22:41 +01:00
pycore_typedefs.h
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pycore_typeobject.h
[3.15] gh-149481: skip FOR_ITER inline specialization for Python __next__ (GH-149491) (#149523)
2026-05-07 19:08:12 -07:00
pycore_typevarobject.h
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pycore_ucnhash.h
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pycore_unicodectype.h
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pycore_unicodeobject_generated.h
[3.15] gh-154090: Store profiling mode and capture settings in binary profiles (GH-154105) (#158144)
2026-09-24 23:52:22 +00:00
pycore_unicodeobject.h
[3.15] gh-157710: Add MemoryError tests to PyUnicodeWriter (#159548)
2026-10-16 16:18:33 +00:00
pycore_unionobject.h
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pycore_uniqueid.h
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pycore_uop_ids.h
[3.15] gh-157468: Validate correct builtins used under JIT (GH-157766) (GH-159048)
2026-10-12 16:31:15 +02:00
pycore_uop_metadata.h
[3.15] gh-151818: Fix double-free in _CALL_LIST_APPEND on allocation failure (GH-151826) (#160200)
2026-10-22 06:23:06 -07:00
pycore_uop.h
[3.15] gh-149335: Avoid JIT trace buffer asserts with overhead above FITNESS_INITIAL (GH-149633) (#150245)
2026-05-24 12:48:58 +05:30
pycore_warnings.h
[3.15] gh-158973: Reset the warnings lock after fork in the child (gh-158974) (gh-159614)
2026-10-19 14:54:15 -07:00
pycore_weakref.h
…