795d5c5b44
gh-144054: shutdown fix for deferred ref counting (GH-144055)
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When shutting down, disable deferred refcounting for all GC objects. It
is important to do this also for untracked objects, which before this
change were getting missed.
Small code cleanup:
We can remove the shutdown case disable_deferred_refcounting() call
inside scan_heap_visitor() if we are careful about it. The key is
that frame_disable_deferred_refcounting() might fail if the object
is untracked.
2026-01-20 14:45:12 +01:00
54bedcf714
gh-144012: Check null binary op extend ( #144014 )
2026-01-19 02:38:37 +08:00
b4b73245d8
gh-143421: Use new buffer to save optimized uops (GH-143682)
2026-01-17 15:52:16 +00:00
61ec66acd5
gh-143946: Show JitOptSymbol on abstract stack when set PYTHON_OPT_DEBUG > 4 (GH-143957)
2026-01-17 15:20:35 +00:00
bb25f7280a
gh-132657: Add maybe_enable_deferred_ref_count() (gh-142843)
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If we are specializing to `LOAD_GLOBAL_MODULE` or `LOAD_ATTR_MODULE`, try
to enable deferred reference counting for the value, if the object is owned by
a different thread. This applies to the free-threaded build only and should
improve scaling of multi-threaded programs.
2026-01-17 01:54:43 +00:00
4d5a676aa0
gh-142913: Add test case for interpreter generator w/ overridden opcodes ( #142911 )
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Add test case for interpreter generator w/ overridden opcodes
2026-01-16 10:33:29 -08:00
19e64afddf
gh-141070: Rename PyUnstable_Object_Dump to PyObject_Dump (GH-142848)
2026-01-16 09:19:43 -05:00
ae53da5758
GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)
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* Moves the `GET_ITER` instruction into the generator function preamble.
This means the the iterable is converted into an iterator during generator
creation, as documented, but keeps it in the same code object allowing
optimization.
2026-01-16 09:11:58 +00:00
f5685a266b
gh-80620: Support negative timestamps on windows in time.gmtime, time.localtime, and datetime module ( #143463 )
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Previously, negative timestamps (representing dates before 1970-01-01) were
not supported on Windows due to platform limitations. The changes introduce a
fallback implementation using the Windows FILETIME API, allowing negative
timestamps to be correctly handled in both UTC and local time conversions.
Additionally, related test code is updated to remove Windows-specific skips
and error handling, ensuring consistent behavior across platforms.
Co-authored-by: Victor Stinner <vstinner@python.org >
2026-01-15 10:51:11 +01:00
794f758cd8
gh-141504: Refactor policy object into a single opt_config (gh-143644)
2026-01-15 09:53:00 +09:00
499706b843
GH-143842: Make optimizer color table static (GH-143846)
2026-01-14 20:37:13 +00:00
e370c8db52
gh-143123: Protect against recursive tracer calls/finalization (GH-143126)
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* Stronger check for recursive traces
* Add a stop_tracing field
* Stop early when tracing exceptions
2026-01-14 12:23:14 +00:00
6db952eae9
GH-143613: Add colours and some more edges to executor visualization graph (GH-143809)
2026-01-14 11:34:58 +00:00
ce8f5f98c6
gh-106287: Do not write objects after an unmarshalling error (GH-132715)
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Writing out an object may involve a slot lookup, which is not safe to do with
an exception raised. In debug mode an assertion failure will occur if this
happens.
2026-01-14 11:25:46 +00:00
94dbce1397
gh-138050: Use cold flag instead of warm flag in MAKE_WARM (GH-143827)
2026-01-14 10:27:33 +00:00
2873c31edf
gh-131798: JIT optimizer: Support custom binary op and property frames (GH-143735)
2026-01-13 19:11:53 +00:00
c556786b8b
gh-134584: Eliminate redundant refcounting in TO_BOOL_INT, TO_BOOL_LIST (GH-143759)
2026-01-12 21:56:26 +00:00
e535bdb0a2
gh-134584: Eliminate redundant refcounting from _CONTAINS_{OP|OP_SET|OP_DICT} (GH-143731)
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Signed-off-by: Manjusaka <me@manjusaka.me >
2026-01-12 15:47:31 +00:00
054a565c64
gh-134584: JIT: Remove redundant refcount for _BINARY_OP_SUBSCR_DICT (GH-143724)
2026-01-12 14:13:55 +00:00
548526bbbe
gh-134584: JIT: Remove redundant refcounting for UNARY_{INVERT|NEGATIVE} (GH-143704)
2026-01-11 20:42:55 +00:00
ce6bae92da
gh-143377: fix crashes in _interpreters.capture_exception ( #143418 )
2026-01-10 12:37:54 +01:00
e2f0160026
gh-143604: Hold strong reference to executor during JIT tracing (GH-143646)
...
Co-authored-by: Ken Jin <kenjin4096@gmail.com >
2026-01-10 11:15:48 +00:00
95259116ec
gh-142764: Restore REPLACE_OPCODE_IF_EVALUATES_PURE optimization for some ops (GH-143335)
2026-01-09 23:18:22 +00:00
e0fb278064
gh-143421: Allocate all JIT state in one go (GH-143626)
2026-01-09 19:00:49 +00:00
b852236b26
gh-143421: Lazily allocate tracer code and opt buffers (GH-143597)
2026-01-09 16:56:19 +00:00
a4086d7f89
gh-142829: Fix use-after-free in Context.__eq__ via re-entrant ContextVar.set ( #142905 )
2026-01-09 17:57:34 +05:30
39a2bcf949
gh-143547: Fix PyErr_FormatUnraisable() fallback ( #143557 )
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Hold a strong reference to 'hook' while calling the default
unraisable took to log hook failure.
Fix test_sys.UnraisableHookTest: use the right decorator function to
disable colors. Previously, tests were always skipped.
2026-01-09 13:16:22 +01:00
aeb3403563
gh-143421: Move JitOptContext from stack allocation to per-thread heap allocation (GH-143536)
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* move JitOptContext to _PyThreadStateImpl
* make _PyUOpInstruction buffer a part of _PyThreadStateImpl
Co-authored-by: Kumar Aditya <kumaraditya@python.org >
2026-01-08 19:38:21 +00:00
8cf5c4d89a
gh-142908: Don't use DK_IS_UNICODE in interpreter (gh-142909)
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`DK_IS_UNICODE()` includes split keys and we don't want to specialize on
those accesses..
2026-01-08 09:32:20 -05:00
f11f5ebfe6
gh-129824: Fix data race on runtime->gilstate.check_enabled (gh-143530)
2026-01-07 17:56:14 -05:00
bfc3d8d77f
gh-143531: Use macro to check if PEP 523 is hooked ( #143532 )
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Use macro to check if PEP 523 is hooked
2026-01-07 13:26:19 -08:00
0a5c04a5ce
gh-134584: Eliminate redundant refcounting from TO_BOOL_STR (GH-143417)
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Signed-off-by: Manjusaka <me@manjusaka.me >
2026-01-06 21:11:53 +00:00
df355348f0
gh-142982: Specialize CALL_FUNCTION_EX (GH-143391)
2026-01-06 20:34:08 +00:00
74bb3ca1f8
gh-142863: optimize list and set calls with generator expressions ( #142864 )
2026-01-06 23:23:28 +05:30
90c44bc803
gh-131798: Support generator frames in the JIT optimizer (GH-143340)
2026-01-06 16:39:57 +00:00
faa3dc7c64
gh-143469: enable LOAD_ATTR_MODULE specialization even if __getattr__ is defined ( #143470 )
2026-01-06 22:09:18 +05:30
54f1ed0299
gh-134584: Eliminate redundant refcounting in TO_BOOL_ALWAYS_TRUE (GH-143427)
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Co-authored-by: Ken Jin <kenjin@python.org >
2026-01-06 16:11:56 +00:00
841b7482dd
gh-143424: Fix assertion in _PyMutex_LockTimed (gh-143439)
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The assertion doesn't necessarily hold for `threading.Lock`, so allow
the lock to be unlocked if `_PY_LOCK_PYTHONLOCK` is set on the flags.
2026-01-06 09:40:14 -05:00
4d21297d28
gh-41779: Allow defining any __slots__ for a class derived from tuple (GH-141763)
2026-01-06 11:36:00 +02:00
d6f77e6a3f
gh-116738: make entering of contextvars.Context thread safe ( #143074 )
2026-01-06 12:24:02 +05:30
7a572d9f21
gh-143108: Don't instrument some faulthandler related functions for TSan ( #143450 )
2026-01-05 22:13:29 +01:00
e6bfe4d886
gh-139757: Add BINARY_OP_SUBSCR_USTR_INT (GH-143389)
2026-01-04 14:14:27 +00:00
6116d70bbd
gh-143403: Fix a UAF in _BINARY_OP_INPLACE_ADD_UNICODE (GH-143404)
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Fix a UAF in `_BINARY_OP_INPLACE_ADD_UNICODE`
2026-01-04 13:10:39 +00:00
12283f6373
gh-141504: Factor out tracing and optimization heuristics into a single object (gh-143381)
2026-01-03 15:22:14 +00:00
6d05e55de0
Fix dunder name typo in compiler code comment ( #143374 )
2026-01-03 10:08:42 +00:00
b538c2832d
gh-143361: Pass PY_VECTORCALL_ARGUMENTS_OFFSET in _Py_CallBuiltinClass_StackRefSteal (GH-143367)
...
Co-authored-by: Aaron Wieczorek <woz@Aarons-MacBook-Pro.local >
2026-01-02 20:43:00 +00:00
f7a03bb944
gh-134584: JIT: Remove redundant refcount from STORE_FAST (GH-143336)
2026-01-02 18:22:21 +00:00
61f2ad9a3a
gh-139757: Fix unintended bytecode specialization for non-ascii string (gh-143352)
2026-01-02 14:05:08 +00:00
315f474d11
gh-139757: Add _GUARD_NOS_COMPACT_ASCII for compact ascii optimization (gh-143332)
2026-01-02 20:58:14 +09:00
d00d39f58e
gh-134584: Eliminate redundant refcounting from _LOAD_ATTR_SLOT (GH-143320)
...
Signed-off-by: Manjusaka <me@manjusaka.me >
Co-authored-by: Ken Jin <kenjin4096@gmail.com >
2026-01-01 17:27:02 +00:00
Neil Schemenauer