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Pablo Galindo Salgado 96e4cd698a
gh-144319: Fix huge page safety in pymalloc arenas (#144331) 
The pymalloc huge page support had two problems. First, on
architectures where the default huge page size exceeds the arena
size (e.g. 32 MiB on PPC, 512 MiB on ARM64 with 64 KB base
pages), mmap with MAP_HUGETLB silently allocates a full huge page
even when the requested size is smaller. The subsequent munmap
with the original arena size then fails with EINVAL, permanently
leaking the entire huge page. Second, huge pages were always
attempted when compiled in, with no way to disable them at
runtime. On Linux, if the huge page pool is exhausted, page
faults including copy-on-write faults after fork deliver SIGBUS
and kill the process.

The arena allocator now queries the system huge page size from
/proc/meminfo and skips MAP_HUGETLB when the arena size is not a
multiple of it. Huge pages also now require explicit opt-in at
runtime via the PYTHON_PYMALLOC_HUGEPAGES environment variable,
which is read through PyConfig and respects -E and -I flags.
The config field pymalloc_hugepages is propagated to the runtime
allocators struct so the low-level arena allocator can check it
without calling getenv directly.
2026-01-30 18:18:56 +00:00
..
clinic gh-135801: Add the module parameter to compile() etc (GH-139652) 2025-11-13 13:21:32 +02:00
frozen_modules gh-97669: Create Tools/build/ directory (#97963) 2022-10-17 12:01:00 +02:00
_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 bpo-43244: Remove ast.h, asdl.h, Python-ast.h headers (GH-24933) 2021-03-23 20:47:40 +01:00
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.c gh-132661: Implement PEP 750 (#132662) 2025-04-30 11:46:41 +02:00
ast_preprocess.c gh-135801: Add the module parameter to compile() etc (GH-139652) 2025-11-13 13:21:32 +02:00
ast_unparse.c gh-132661: Disallow Template/str concatenation after PEP 750 spec update (#135996) 2025-07-21 08:44:26 +02:00
bltinmodule.c gh-135801: Add the module parameter to compile() etc (GH-139652) 2025-11-13 13:21:32 +02:00
bootstrap_hash.c GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
brc.c Fix typos in documentation and comments (#119763) 2024-06-04 10:22:22 +00:00
bytecodes.c gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122) 2026-01-30 15:25:19 +00:00
ceval.c gh-120321: Make gi_yieldfrom thread-safe in free-threading build (#144292) 2026-01-30 12:20:27 -05:00
ceval.h gh-142913: Add test case for interpreter generator w/ overridden opcodes (#142911) 2026-01-16 10:33:29 -08:00
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
codecs.c Python/codecs.c: Remove unused forward declaration (#139511) 2025-10-03 13:33:49 +02:00
codegen.c GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569) 2026-01-16 09:11:58 +00:00
compile.c GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569) 2026-01-16 09:11:58 +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 gh-116738: make entering of contextvars.Context thread safe (#143074) 2026-01-06 12:24:02 +05:30
critical_section.c gh-140795: fetch thread state once on fast path for critical sections (#141406) 2025-11-21 19:49:53 +05:30
crossinterp.c gh-143377: fix crashes in _interpreters.capture_exception (#143418) 2026-01-10 12:37:54 +01:00
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
dtoa.c gh-131238: Add explicit includes to pycore headers (#131257) 2025-03-17 12:32:43 +01:00
dup2.c gh-108765: Python.h no longer includes <unistd.h> (#108783) 2023-09-02 16:50:18 +02:00
dynamic_annotations.c bpo-32241: Add the const qualifire to declarations of umodifiable strings. (#4748) 2017-12-12 13:55:04 +02:00
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-131238: Remove more includes from pycore_interp.h (#131480) 2025-03-19 23:01:32 +01:00
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-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 GH-108614: Unbreak emscripten build (GH-109132) 2023-09-08 17:54:45 +01:00
emscripten_syscalls.c gh-124621: Emscripten: Fix __syscall_ioctl patch (GH-136993) 2025-07-22 15:05:26 +02:00
emscripten_trampoline.c gh-128627: Use __builtin_wasm_test_function_pointer_signature for Emscripten trampoline (#137470) 2025-09-17 15:33:55 +01:00
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
errors.c gh-143547: Fix PyErr_FormatUnraisable() fallback (#143557) 2026-01-09 13:16:22 +01:00
executor_cases.c.h gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122) 2026-01-30 15:25:19 +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-120321: Fix TSan reported races on gi_frame_state (gh-143128) 2025-12-24 16:10:43 -05:00
frozen.c GH-89435: os.path should not be a frozen module (#126924) 2024-11-22 18:50:30 +00:00
frozenmain.c Use PyConfig_Get() in frozenmain.c (#137421) 2025-08-06 14:33:28 +02:00
future.c gh-126139: Improve error message location for future statement with unknown feature (#126140) 2024-10-29 23:57:59 +00:00
gc.c gh-141070: Rename PyUnstable_Object_Dump to PyObject_Dump (GH-142848) 2026-01-16 09:19:43 -05:00
gc_free_threading.c gh-144054: no deferred refcount for untracked (gh-144081) 2026-01-20 10:01:09 -08:00
gc_gil.c gh-100240: Use a consistent implementation for freelists (#121934) 2024-07-22 12:08:27 -04:00
generated_cases.c.h gh-144289: Remove ENABLE_SPECIALIZATION_FT (gh-144290) 2026-01-27 17:52:50 -05:00
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 gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
getopt.c GH-133336: Remove reserved `-J` flag for Jython (#133444) 2025-05-05 15:09:19 +00:00
getplatform.c bpo-32150: Expand tabs to spaces in C files. (#4583) 2017-11-28 17:56:10 +02:00
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 gh-111545: Add Py_HashPointer() function (#112096) 2023-12-06 15:09:22 +01:00
import.c gh-142776: Ensure fp file descriptor is closed on all code paths in import.c (GH-142777) 2025-12-19 10:14:52 -08:00
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-144319: Fix huge page safety in pymalloc arenas (#144331) 2026-01-30 18:18:56 +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 GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
intrinsics.c gh-111489: Remove _PyTuple_FromArray() alias (#139973) 2025-10-11 22:58:14 +02:00
jit.c GH-126910: add test for manual frame unwinding (#144137) 2026-01-27 13:17:40 +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-106287: Do not write objects after an unmarshalling error (GH-132715) 2026-01-14 11:25:46 +00:00
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 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-100240: Use a consistent implementation for freelists (#121934) 2024-07-22 12:08:27 -04:00
opcode_targets.h gh-142982: Specialize CALL_FUNCTION_EX (GH-143391) 2026-01-06 20:34:08 +00:00
optimizer.c Misc: remove duplicate instr_frame assignment in _PyJit_TryInitializeTracing (GH-144155) 2026-01-24 09:37:45 +00:00
optimizer_analysis.c gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122) 2026-01-30 15:25:19 +00:00
optimizer_bytecodes.c gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122) 2026-01-30 15:25:19 +00:00
optimizer_cases.c.h gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122) 2026-01-30 15:25:19 +00:00
optimizer_symbols.c gh-144280: Add missing predicate symbol to case-switch (GH-144298) 2026-01-30 16:43:27 +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-143228: Fix UAF in perf trampoline during finalization (#143233) 2025-12-28 13:50:23 +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 Chore: Fix typo in pyarena.c (#126527) 2024-11-07 16:37:41 +01:00
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 gh-111389: replace deprecated occurrences of _PyHASH_* macros (#141236) 2025-11-09 15:14:08 +01:00
pylifecycle.c gh-144307: Fix a reference leak during module teardown (GH-144308) 2026-01-29 13:50:54 -05:00
pymath.c bpo-45440: Remove pymath.c fallbacks (GH-28977) 2021-10-15 19:45:34 +02:00
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 gh-108767: Replace ctype.h functions with pyctype.h functions (#108772) 2023-09-01 18:36:53 +02:00
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-144169: Fix three crashes in AST objects with non-str kwargs (#144178) 2026-01-25 17:28:58 -08:00
Python-tokenize.c gh-111178: Fix function signatures for test_types (#131455) 2025-03-19 13:46:17 +00:00
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 fix typos in crossinterp.c and qsbr.c (#142612) 2025-12-12 11:48:20 +05:30
README Issue #18093: Factor out the programs that embed the runtime 2014-07-25 21:52:14 +10:00
remote_debug.h gh-131591: Do not free page caches that weren't allocated (#143205) 2025-12-27 13:38:11 +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-144289: Remove ENABLE_SPECIALIZATION_FT (gh-144290) 2026-01-27 17:52:50 -05:00
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 GH-131238: Core header refactor (GH-131250) 2025-03-17 09:19:04 +00:00
symtable.c gh-135801: Add the module parameter to compile() etc (GH-139652) 2025-11-13 13:21:32 +02:00
sysmodule.c gh-142571: Check for errors before calling each syscall in PyUnstable_CopyPerfMapFile() (#142460) 2025-12-11 21:18:52 +00:00
thread.c gh-134745: Use "pymutex" for sys.thread_info on Windows (#141140) 2025-11-06 16:10:39 +01:00
thread_nt.h gh-134745: Change PyThread_allocate_lock() implementation to PyMutex (#134747) 2025-05-30 10:15:47 +00:00
thread_pthread.h gh-137884: Added threading.get_native_id() on Illumos/Solaris (GH-137927) 2025-08-20 17:10:44 +00:00
thread_pthread_stubs.h gh-125161: return non zero value in pthread_self on wasi (#125303) 2024-10-13 20:59:41 +05:30
tier2_engine.md Docs: fix spelling of the word 'transferring' (#116641) 2024-03-13 23:53:32 +01:00
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 gh-128923: Use zero to indicate unassigned unique id (#128925) 2025-01-17 16:42:27 +01:00
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