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cpython/Objects
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Guido van Rossum 570a82d46a
gh-117045: Add code object to function version cache (#117028) 
Changes to the function version cache:

- In addition to the function object, also store the code object,
  and allow the latter to be retrieved even if the function has been evicted.
- Stop assigning new function versions after a critical attribute (e.g. `__code__`)
  has been modified; the version is permanently reset to zero in this case.
- Changes to `__annotations__` are no longer considered critical. (This fixes gh-109998.)

Changes to the Tier 2 optimization machinery:

- If we cannot map a function version to a function, but it is still mapped to a code object,
  we continue projecting the trace.
  The operand of the `_PUSH_FRAME` and `_POP_FRAME` opcodes can be either NULL,
  a function object, or a code object with the lowest bit set.

This allows us to trace through code that calls an ephemeral function,
i.e., a function that may not be alive when we are constructing the executor,
e.g. a generator expression or certain nested functions.
We will lose globals removal inside such functions,
but we can still do other peephole operations
(and even possibly [call inlining](https://github.com/python/cpython/pull/116290),
if we decide to do it), which only need the code object.
As before, if we cannot retrieve the code object from the cache, we stop projecting.
2024-03-21 12:37:41 -07:00
..
clinic gh-116621: Set manual critical section for list.extend (gh-116657) 2024-03-13 07:28:23 +09:00
mimalloc gh-115103: Delay reuse of mimalloc pages that store PyObjects (#115435) 2024-03-06 09:42:11 -05:00
stringlib gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
abstract.c gh-116316: Fix typo in UNARY_FUNC(PyNumber_Positive) macros (GH-116317) 2024-03-04 17:57:01 +00:00
boolobject.c gh-111999: Add signatures and improve docstrings for builtins (GH-112000) 2023-11-13 09:13:49 +02:00
bytearrayobject.c gh-115323: Add meaningful error message for using bytearray.extend with str (#115332) 2024-02-24 18:34:45 -05:00
bytes_methods.c gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
bytesobject.c gh-108767: Replace ctype.h functions with pyctype.h functions (#108772) 2023-09-01 18:36:53 +02:00
call.c gh-106320: Remove _PyFunction_Vectorcall() API (#107071) 2023-07-22 21:44:33 +00:00
capsule.c gh-108240: Add pycore_capsule.h internal header file (#108596) 2023-08-29 01:20:02 +00:00
cellobject.c gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
classobject.c gh-113157 gh-89519: Fix method descriptors (gh-113233) 2023-12-21 16:08:35 -06:00
codeobject.c gh-117045: Add code object to function version cache (#117028) 2024-03-21 12:37:41 -07:00
complexobject.c gh-109598: make PyComplex_RealAsDouble/ImagAsDouble use __complex__ (GH-109647) 2024-01-15 16:04:17 +01:00
descrobject.c gh-101860: Expose __name__ on property (GH-101876) 2024-02-20 17:14:34 +02:00
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-112075: Enable freeing with qsbr and fallback to lock on key changed (GH-116336) 2024-03-05 09:08:18 +00:00
enumobject.c gh-106320: Create pycore_modsupport.h header file (#106355) 2023-07-03 09:39:11 +00:00
exception_handling_notes.txt GH-105848: Simplify the arrangement of CALL's stack (GH-107788) 2023-08-09 18:19:39 +00:00
exceptions.c gh-114570: Add PythonFinalizationError exception (#115352) 2024-02-14 23:35:06 +01:00
fileobject.c gh-82626: Emit a warning when bool is used as a file descriptor (GH-111275) 2024-02-05 22:51:11 +02:00
floatobject.c gh-116714: Handle errors correctly in PyFloat_GetInfo (#116715) 2024-03-13 12:38:03 +00:00
frame_layout.md gh-109094: replace frame->prev_instr by frame->instr_ptr (#109095) 2023-10-26 13:43:10 +00:00
frameobject.c gh-115756: make PyCode_GetFirstFree an unstable API (GH-115781) 2024-03-19 09:20:38 +00:00
funcobject.c gh-117045: Add code object to function version cache (#117028) 2024-03-21 12:37:41 -07:00
genericaliasobject.c gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
genobject.c gh-111968: Split _Py_async_gen_asend_freelist out of _Py_async_gen_fr… (gh-115546) 2024-02-17 10:03:10 +09:00
iterobject.c gh-106320: Remove private _PyEval function (#108433) 2023-08-24 20:25:22 +02:00
listobject.c gh-116621: Specialize list.extend for dict items (gh-116888) 2024-03-19 12:18:07 +09:00
listsort.txt GH-116554: Relax list.sort()'s notion of "descending" runs (#116578) 2024-03-12 19:59:42 -05:00
lnotab_notes.txt Document the co_lines method on code objects (#113682) 2024-01-03 19:29:24 +00:00
locations.md GH-88116: Use a compact format to represent end line and column offsets. (GH-91666) 2022-04-21 16:10:37 +01:00
longobject.c gh-110819: Fix ‘kind’ may be used uninitialized warning in longobject (#116599) 2024-03-12 13:50:06 +03:00
memoryobject.c gh-111178: Avoid calling functions from incompatible pointer types in memoryobject.c (GH-112863) 2023-12-11 17:43:07 +01:00
methodobject.c gh-114626: add PyCFunctionFast and PyCFunctionFastWithKeywords (GH-114627) 2024-02-15 11:05:20 +01:00
moduleobject.c gh-116437: Use new C API PyDict_Pop() to simplify the code (GH-116438) 2024-03-07 11:21:08 +02:00
namespaceobject.c gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
object.c gh-76785: Drop PyInterpreterID_Type (gh-117101) 2024-03-21 17:15:02 +00:00
object_layout.md gh-106293: Fix typos in Objects/object_layout.md (#106294) 2024-01-16 23:11:15 +00:00
object_layout_312.gv GH-96068: Document object layout (GH-96069) 2022-08-23 13:55:43 +01:00
object_layout_312.png GH-96068: Document object layout (GH-96069) 2022-08-23 13:55:43 +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
obmalloc.c gh-112075: Support freeing object memory via QSBR (#116344) 2024-03-08 09:56:36 -08:00
odictobject.c gh-112075: Add critical sections for most dict APIs (#114508) 2024-02-06 14:03:43 -08:00
picklebufobject.c gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
rangeobject.c gh-106320: Remove private _PyEval function (#108433) 2023-08-24 20:25:22 +02:00
README Issue #18093: Factor out the programs that embed the runtime 2014-07-25 21:52:14 +10:00
setobject.c gh-112069: Make sets thread-safe with the GIL disabled (#113800) 2024-03-08 16:25:34 -05:00
sliceobject.c gh-111968: Rename freelist related struct names to Eric's suggestion (gh-115329) 2024-02-14 00:32:51 +00:00
structseq.c GH-108362: Incremental Cycle GC (GH-116206) 2024-03-20 08:54:42 +00:00
tupleobject.c gh-116381: Remove bad specializations, add fail stats (GH-116464) 2024-03-08 00:21:21 +08:00
typeobject.c gh-115756: make PyCode_GetFirstFree an unstable API (GH-115781) 2024-03-19 09:20:38 +00:00
typeslots.inc bpo-41073: PyType_GetSlot() can now accept static types. (GH-21931) 2020-11-10 12:53:46 -08:00
typeslots.py bpo-41073: PyType_GetSlot() can now accept static types. (GH-21931) 2020-11-10 12:53:46 -08:00
typevarobject.c gh-110864: TypeVar constructor: Partially revert gh-110784, constraints cannot be NULL (#110922) 2023-10-16 15:01:04 +00:00
unicodectype.c bpo-46670: Remove unused macros in the Objects directory (GH-31193) 2022-02-07 16:21:41 +01:00
unicodeobject.c gh-113964: Don't prevent new threads until all non-daemon threads exit (#116677) 2024-03-19 14:40:20 -04:00
unicodetype_db.h gh-96954: Fix make regen-unicodedata in out-of-tree builds (#112118) 2023-11-15 16:42:17 +00:00
unionobject.c gh-108511: Add C API functions which do not silently ignore errors (GH-109025) 2023-09-17 14:23:31 +03:00
weakrefobject.c gh-111926: Simplify proxy creation logic (#116844) 2024-03-15 09:58:40 -04:00

README 

Source files for various builtin objects