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mpage e99f159be4
gh-115999: Stop the world when invalidating function versions (#124997) 
Stop the world when invalidating function versions

The tier1 interpreter specializes `CALL` instructions based on the values
of certain function attributes (e.g. `__code__`, `__defaults__`). The tier1
interpreter uses function versions to verify that the attributes of a function
during execution of a specialization match those seen during specialization.
A function's version is initialized in `MAKE_FUNCTION` and is invalidated when
any of the critical function attributes are changed. The tier1 interpreter stores
the function version in the inline cache during specialization. A guard is used by
the specialized instruction to verify that the version of the function on the operand
stack matches the cached version (and therefore has all of the expected attributes).
It is assumed that once the guard passes, all attributes will remain unchanged
while executing the rest of the specialized instruction.

Stopping the world when invalidating function versions ensures that all critical
function attributes will remain unchanged after the function version guard passes
in free-threaded builds. It's important to note that this is only true if the remainder
of the specialized instruction does not enter and exit a stop-the-world point.

We will stop the world the first time any of the following function attributes
are mutated:

- defaults
- vectorcall
- kwdefaults
- closure
- code

This should happen rarely and only happens once per function, so the performance
impact on majority of code should be minimal.

Additionally, refactor the API for manipulating function versions to more clearly
match the stated semantics.
 		2024-10-08 10:04:35 -04:00
..
clinic gh-121905: Consistently use "floating-point" instead of "floating point" (GH-121907) 2024-07-19 08:06:02 +00:00
mimalloc gh-123826: Fix unused function warnings in mimalloc on NetBSD (#123827) 2024-09-09 13:22:28 -04:00
stringlib gh-121040: Use __attribute__((fallthrough)) (#121044) 2024-06-27 09:58:44 +00:00
README Issue #18093: Factor out the programs that embed the runtime 2014-07-25 21:52:14 +10:00
abstract.c Remove "print >>obj" exception hint for Python 2 (#122853) 2024-08-12 04:12:14 +00:00
boolobject.c gh-122982: Extend the deprecation period for bool inversion by two years (#123306) 2024-08-25 12:24:44 -07:00
bytearrayobject.c gh-111178: Fix function signatures in bytearrayobject.c (#124940) 2024-10-04 11:59:51 +02:00
bytes_methods.c gh-121165: protect macro expansion of `ADJUST_INDICES` with do-while(0) (#121166) 2024-07-02 16:27:51 +05:30
bytesobject.c gh-111178: Fix function signatures in bytesobject.c (#124806) 2024-10-02 13:35:51 +02:00
call.c gh-106320: Remove _PyFunction_Vectorcall() API (#107071) 2023-07-22 21:44:33 +00:00
capsule.c gh-124538: Fix crash when using `gc.get_referents` on an untracked capsule object (#124559) 2024-09-26 12:29:43 +02:00
cellobject.c gh-117323: Make `cell` thread-safe in free-threaded builds (#117330) 2024-03-29 13:35:43 -04:00
classobject.c gh-111178: Fix function signatures in classobject.c (#124943) 2024-10-04 12:00:00 +02:00
codeobject.c gh-122854: Add Py_HashBuffer() function (#122855) 2024-08-30 15:42:27 +00:00
complexobject.c gh-119771: Set errno on overflows in _Py_c_pow() (#120256) 2024-09-18 10:39:11 +02:00
descrobject.c bpo-24766: doc= argument to subclasses of property not handled correctly (GH-2487) 2024-06-10 08:55:49 +00:00
dictnotes.txt bpo-46845: Reduce dict size when all keys are Unicode (GH-31564) 2022-03-02 08:09:28 +09:00
dictobject.c gh-124296: Remove private dictionary version tag (PEP 699) (#124472) 2024-10-01 12:39:56 -04:00
enumobject.c gh-106320: Create pycore_modsupport.h header file (#106355) 2023-07-03 09:39:11 +00:00
exceptions.c gh-123378: fix a crash in `UnicodeError.__str__` (#124935) 2024-10-08 13:37:59 +02:00
fileobject.c Replace PyObject_Del with PyObject_Free (#122453) 2024-08-01 14:12:33 +02:00
floatobject.c gh-123497: New limit for Python integers on 64-bit platforms (GH-123724) 2024-09-29 10:40:20 +03:00
frameobject.c gh-124513: Check args in framelocalsproxy_new() (#124515) 2024-09-25 21:41:09 +02:00
funcobject.c gh-115999: Stop the world when invalidating function versions (#124997) 2024-10-08 10:04:35 -04:00
genericaliasobject.c gh-119180: Add evaluate functions for type params and type aliases (#122212) 2024-07-27 17:24:10 +00:00
genobject.c gh-111178: Fix function signatures in genobject.c (#124970) 2024-10-05 09:56:44 +02:00
iterobject.c gh-106320: Remove private _PyEval function (#108433) 2023-08-24 20:25:22 +02:00
listobject.c gh-123990: Good bye WITH_FREELISTS macro (gh-124358) 2024-09-24 01:28:59 +00:00
listsort.txt GH-116939: Rewrite binarysort() (#116940) 2024-03-21 22:27:25 -05:00
lnotab_notes.txt Document the `co_lines` method on code objects (#113682) 2024-01-03 19:29:24 +00:00
longobject.c Use _PyLong_GetOne() and _PyLong_GetZero() in long_invmod() (#125044) 2024-10-07 19:54:42 +02:00
memoryobject.c gh-77894: Fix a crash when the GC breaks a loop containing a memoryview (GH-123898) 2024-09-11 12:05:46 +03:00
methodobject.c gh-111178: Fix function signatures in methodobject.c (#124902) 2024-10-02 17:24:10 +02:00
moduleobject.c gh-111178: Fix function signatures in moduleobject.c (#124900) 2024-10-02 14:31:04 +00:00
namespaceobject.c gh-108191: Add support of positional argument in SimpleNamespace constructor (GH-108195) 2024-04-25 00:39:54 +03:00
object.c gh-124127: Make Py_REFCNT() opaque in limited C API 3.14 (#124128) 2024-09-24 08:42:58 +02:00
object_layout.md GH-115776: Allow any fixed sized object to have inline values (GH-123192) 2024-08-21 15:52:04 +01:00
object_layout_312.gv GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115) 2024-04-02 11:59:21 +01:00
object_layout_312.png GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115) 2024-04-02 11:59:21 +01:00
object_layout_313.gv GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115) 2024-04-02 11:59:21 +01:00
object_layout_313.png GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115) 2024-04-02 11:59:21 +01:00
object_layout_full_312.gv GH-96068: Document object layout (GH-96069) 2022-08-23 13:55:43 +01:00
object_layout_full_312.png GH-96068: Document object layout (GH-96069) 2022-08-23 13:55:43 +01:00
object_layout_full_313.gv GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115) 2024-04-02 11:59:21 +01:00
object_layout_full_313.png GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115) 2024-04-02 11:59:21 +01:00
obmalloc.c gh-122697: Fix free-threading memory leaks at shutdown (#122703) 2024-08-08 12:48:17 -04:00
odictobject.c gh-119004: fix a crash in equality testing between `OrderedDict` (#121329) 2024-09-23 18:44:36 -05:00
picklebufobject.c gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
rangeobject.c gh-111178: fix some USAN failures - mismatched function pointers (GH-123004) 2024-09-27 23:51:50 +02:00
setobject.c gh-111178: Fix function signatures in setobject.c (#124888) 2024-10-02 16:03:23 +02:00
sliceobject.c gh-100240: Use a consistent implementation for freelists (#121934) 2024-07-22 12:08:27 -04:00
structseq.c gh-123091: Use more _Py_IsImmortalLoose() (GH-123602) 2024-09-02 18:17:48 +02:00
tupleobject.c gh-111178: Fix function signatures in tupleobject.c (#124804) 2024-10-02 13:37:04 +02:00
typeobject.c gh-124218: Refactor per-thread reference counting (#124844) 2024-10-01 17:05:42 +00:00
typeslots.inc gh-124153: Implement `PyType_GetBaseByToken()` and `Py_tp_token` slot (GH-124163) 2024-09-18 09:18:19 +02:00
typeslots.py gh-124153: Implement `PyType_GetBaseByToken()` and `Py_tp_token` slot (GH-124163) 2024-09-18 09:18:19 +02:00
typevarobject.c gh-119180: Rename SOURCE format to STRING (#124620) 2024-09-26 13:49:48 -07:00
unicodectype.c bpo-46670: Remove unused macros in the Objects directory (GH-31193) 2022-02-07 16:21:41 +01:00
unicodeobject.c gh-124502: Add PyUnicode_Equal() function (#124504) 2024-10-07 21:24:53 +00:00
unicodetype_db.h closes gh-124016: update Unicode to 16.0.0 (#124017) 2024-09-13 07:47:04 -07:00
unionobject.c gh-119180: Add evaluate functions for type params and type aliases (#122212) 2024-07-27 17:24:10 +00:00
weakrefobject.c gh-111178: Fix function signatures in weakrefobject.c (#124903) 2024-10-02 15:01:23 +00:00

README 

Source files for various builtin objects