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Sam Gross 6577d870b0 gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554) 
Align the QSBR thread state array to a 64-byte cache line boundary
and add padding at the end of _PyThreadStateImpl. Depending on heap
layout, the QSBR array could end up sharing a cache line with a
thread's tlbc_index, causing QSBR quiescent state updates to contend
with reads of tlbc_index in RESUME_CHECK. This is sensitive to
earlier allocations during interpreter init and can appear or
disappear with seemingly unrelated changes.

Either change alone is sufficient to fix the specific issue, but both
are worthwhile to avoid similar problems in the future.
2026-02-17 11:12:25 -05:00
..
clinic
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
frozen_modules
…
_contextvars.c
gh-128384: Use a context variable for warnings.catch_warnings (gh-130010)
2025-04-09 16:18:54 -07:00
_warnings.c
gh-135801: Improve filtering by module in warn_explicit() without module argument (GH-140151)
2025-10-30 15:55:39 +02:00
asdl.c
…
asm_trampoline.S
gh-136459: Add perf trampoline support for macOS (#136461)
2025-07-22 16:47:24 +01:00
assemble.c
gh-87859: Track Code Object Local Kinds For Arguments (gh-132980)
2025-04-29 02:21:47 +00:00
ast_preprocess.c
gh-143055: Implementation of PEP 798 (#143056)
2026-01-30 20:37:52 -08:00
ast_unparse.c
gh-132661: Disallow Template/str concatenation after PEP 750 spec update (#135996)
2025-07-21 08:44:26 +02:00
ast.c
gh-143055: Implementation of PEP 798 (#143056)
2026-01-30 20:37:52 -08:00
bltinmodule.c
gh-141510, PEP 814: Add built-in frozendict type (#144757)
2026-02-17 10:54:41 +01:00
bootstrap_hash.c
…
brc.c
…
bytecodes.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
ceval_gil.c
GH-142513: Reimplement executor management (GH-142931)
2025-12-18 16:43:44 +00:00
ceval_macros.h
gh-120321: Make gi_yieldfrom thread-safe in free-threading build (#144292)
2026-01-30 12:20:27 -05:00
ceval.c
gh-138912: Improve MATCH_CLASS opcode performance (GH-138915)
2026-02-13 21:06:15 -08:00
ceval.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
codecs.c
Python/codecs.c: Remove unused forward declaration (#139511)
2025-10-03 13:33:49 +02:00
codegen.c
gh-144822: remove redundant decref in codegen.c (#144823)
2026-02-14 19:20:33 +00:00
compile.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
condvar.h
…
config_common.h
…
context.c
gh-116738: make entering of contextvars.Context thread safe (#143074)
2026-01-06 12:24:02 +05:30
critical_section.c
gh-144513: Skip critical section locking during stop-the-world (gh-144524)
2026-02-06 15:14:08 +00:00
crossinterp_data_lookup.h
gh-135443: Sometimes Fall Back to __main__.__dict__ For Globals (gh-135491)
2025-06-16 17:34:19 -06:00
crossinterp_exceptions.h
gh-132775: Clean Up Cross-Interpreter Error Handling (gh-135369)
2025-06-13 16:45:21 -06:00
crossinterp.c
gh-143377: fix crashes in _interpreters.capture_exception (#143418)
2026-01-10 12:37:54 +01:00
dtoa.c
…
dup2.c
…
dynamic_annotations.c
…
dynload_hpux.c
…
dynload_shlib.c
gh-131238: Remove more includes from pycore_interp.h (#131480)
2025-03-19 23:01:32 +01:00
dynload_stub.c
…
dynload_win.c
gh-131942: Use the Python-specific Py_DEBUG macro rather than _DEBUG in Windows-related C code (GH-131944)
2025-05-08 15:01:25 +00:00
emscripten_signal.c
…
emscripten_syscalls.c
gh-124621: Emscripten: Fix __syscall_ioctl patch (GH-136993)
2025-07-22 15:05:26 +02:00
emscripten_trampoline_inner.c
gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten trampoline (#137470)
2025-09-17 15:33:55 +01:00
emscripten_trampoline.c
gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten trampoline (#137470)
2025-09-17 15:33:55 +01:00
errors.c
gh-143547: Fix PyErr_FormatUnraisable() fallback (#143557)
2026-01-09 13:16:22 +01:00
executor_cases.c.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
fileutils.c
gh-42400: Fix buffer overflow in _Py_wrealpath() for very long paths (#141529)
2025-11-18 17:34:58 +01:00
flowgraph.c
GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)
2026-01-16 09:11:58 +00:00
frame.c
gh-144446: Fix some frame object thread-safety issues (gh-144479)
2026-02-06 09:43:36 -05:00
frozen.c
…
frozenmain.c
Use PyConfig_Get() in frozenmain.c (#137421)
2025-08-06 14:33:28 +02:00
future.c
…
gc_free_threading.c
gh-144054: no deferred refcount for untracked (gh-144081)
2026-01-20 10:01:09 -08:00
gc_gil.c
…
gc.c
gh-141070: Rename PyUnstable_Object_Dump to PyObject_Dump (GH-142848)
2026-01-16 09:19:43 -05:00
generated_cases.c.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
getargs.c
Revert "gh-112068: C API: Add support of nullable arguments in PyArg_Parse (GH-121303)" (#136991)
2025-07-22 16:39:50 +03:00
getcompiler.c
gh-141341: Rename COMPILER macro to _Py_COMPILER on Windows (#141342)
2025-11-10 15:50:51 +01:00
getcopyright.c
…
getopt.c
GH-133336: Remove reserved `-J` flag for Jython (#133444)
2025-05-05 15:09:19 +00:00
getplatform.c
…
getversion.c
gh-119132: Remove "experimental" tag from the CPython free-threading. (gh-135550)
2025-06-16 23:32:52 +09:00
hamt.c
gh-142829: Fix use-after-free in Context.__eq__ via re-entrant ContextVar.set (#142905)
2026-01-09 17:57:34 +05:30
hashtable.c
…
import.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
importdl.c
gh-140011: Delete importdl assertion that prevents importing embedded modules from packages (GH-141605)
2025-11-26 14:12:49 +01:00
index_pool.c
gh-91048: Refactor and optimize remote debugging module (#134652)
2025-05-25 20:19:29 +00:00
initconfig.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
instruction_sequence.c
GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)
2026-01-16 09:11:58 +00:00
instrumentation.c
Remove redundant pycore_optimizer.h includes (#143184)
2025-12-26 11:11:11 +00:00
interpconfig.c
…
intrinsics.c
gh-111489: Remove _PyTuple_FromArray() alias (#139973)
2025-10-11 22:58:14 +02:00
jit.c
fix warnings in jit builds (GH-144817)
2026-02-14 17:39:10 +00:00
legacy_tracing.c
gh-137400: Fix thread-safety issues when profiling all threads (gh-137518)
2025-08-13 14:15:12 -04:00
lock.c
gh-120321: Make gi_yieldfrom thread-safe in free-threading build (#144292)
2026-01-30 12:20:27 -05:00
marshal.c
gh-141510, PEP 814: Add built-in frozendict type (#144757)
2026-02-17 10:54:41 +01:00
modsupport.c
gh-137210: Add a struct, slot & function for checking an extension's ABI (GH-137212)
2025-09-05 16:23:18 +02:00
mysnprintf.c
…
mystrtoul.c
…
object_stack.c
…
opcode_targets.h
gh-142982: Specialize CALL_FUNCTION_EX (GH-143391)
2026-01-06 20:34:08 +00:00
optimizer_analysis.c
fix warnings in jit builds (GH-144817)
2026-02-14 17:39:10 +00:00
optimizer_bytecodes.c
fix warnings in jit builds (GH-144817)
2026-02-14 17:39:10 +00:00
optimizer_cases.c.h
fix warnings in jit builds (GH-144817)
2026-02-14 17:39:10 +00:00
optimizer_symbols.c
GH-144179: Use recorded values to make optimizer more robust (GH-144437)
2026-02-05 08:58:41 +00:00
optimizer.c
fix warnings in jit builds (GH-144817)
2026-02-14 17:39:10 +00:00
parking_lot.c
gh-137433: Fix deadlock with stop-the-world and daemon threads (gh-137735)
2025-09-16 09:21:58 +01:00
pathconfig.c
gh-133644: Remove deprecated Python initialization getter functions (#133661)
2025-05-09 11:39:23 +00:00
perf_jit_trampoline.c
gh-144194: Fix mmap failure check in perf_jit_trampoline.c (#143713)
2026-01-28 13:30:17 +00:00
perf_trampoline.c
gh-144766: Fix a crash in fork child process when perf support is enabled. (#144795)
2026-02-14 11:41:28 +00:00
preconfig.c
GH-133711: Enable UTF-8 mode by default (PEP 686) (#133712)
2025-07-15 10:45:41 +01:00
pyarena.c
…
pyctype.c
…
pyfpe.c
…
pyhash.c
gh-111389: replace deprecated occurrences of _PyHASH_* macros (#141236)
2025-11-09 15:14:08 +01:00
pylifecycle.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pymath.c
…
pystate.c
gh-144068: fix JIT tracer memory leak when daemon thread exits (GH-144077)
2026-01-24 09:43:01 +00:00
pystats.c
GH-135379: Top of stack caching for the JIT. (GH-135465)
2025-12-11 10:32:52 +00:00
pystrcmp.c
…
pystrhex.c
gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548)
2025-12-05 16:24:35 +02:00
pystrtod.c
gh-141004: soft-deprecate Py_INFINITY macro (#141033)
2025-11-12 13:44:49 +01:00
Python-ast.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
Python-tokenize.c
…
pythonrun.c
gh-141070: Rename PyUnstable_Object_Dump to PyObject_Dump (GH-142848)
2026-01-16 09:19:43 -05:00
pytime.c
gh-80620: Support negative timestamps on windows in time.gmtime, time.localtime, and datetime module (#143463)
2026-01-15 10:51:11 +01:00
qsbr.c
gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554)
2026-02-17 11:12:25 -05:00
README
…
record_functions.c.h
GH-144179: Use recorded values to make optimizer more robust (GH-144437)
2026-02-05 08:58:41 +00:00
remote_debug.h
gh-144563: Fix remote debugging with duplicate libpython mappings from ctypes (#144595)
2026-02-10 10:04:50 +00:00
remote_debugging.c
gh-138122: Implement frame caching in RemoteUnwinder to reduce memory reads (#142137)
2025-12-06 22:37:34 +00:00
specialize.c
gh-142349: Fix refcount corruption in lazy import specialization (#144733)
2026-02-12 11:45:28 +00:00
stackrefs.c
gh-131527: Stackref debug borrow checker (#140599)
2025-11-05 11:12:56 -08:00
stdlib_module_names.h
gh-81313: Add the math.integer module (PEP-791) (GH-133909)
2025-10-31 16:13:43 +02:00
structmember.c
gh-41779: Allow defining any __slots__ for a class derived from tuple (GH-141763)
2026-01-06 11:36:00 +02:00
suggestions.c
…
symtable.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
sysmodule.c
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
thread_nt.h
gh-134745: Change PyThread_allocate_lock() implementation to PyMutex (#134747)
2025-05-30 10:15:47 +00:00
thread_pthread_stubs.h
…
thread_pthread.h
gh-137884: Added threading.get_native_id() on Illumos/Solaris (GH-137927)
2025-08-20 17:10:44 +00:00
thread.c
gh-134745: Use "pymutex" for sys.thread_info on Windows (#141140)
2025-11-06 16:10:39 +01:00
tier2_engine.md
…
traceback.c
gh-143108: Don't instrument some faulthandler related functions for TSan (#143450)
2026-01-05 22:13:29 +01:00
tracemalloc.c
gh-143057: avoid locking in tracemalloc C-APIs when it is not enabled (#143065)
2025-12-22 21:08:07 +05:30
uniqueid.c
…
vm-state.md
gh-133079: Remove Py_C_RECURSION_LIMIT & PyThreadState.c_recursion_remaining (GH-133080)
2025-04-29 12:56:20 +02:00

README 

Miscellaneous source files for the main Python shared library
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