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* typing: Add more tests for TypeVar (#104571)Jelle Zijlstra2023-05-171-1/+1
| | | | | | | | During the PEP 695 implementation at one point I made TypeVar.__name__ return garbage, and all of test_typing passed. So I decided to add a few more tests. In the process I discovered a minor incompatibility from the C implementation of TypeVar: empty constraints were returned as None instead of an empty tuple.
* GH-103906: Remove immortal refcounting in the interpreter (GH-103909)Brandt Bucher2023-05-161-7/+1
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* gh-103763: Implement PEP 695 (#103764)Jelle Zijlstra2023-05-156-4/+2490
| | | | | | | | | | | | | | This implements PEP 695, Type Parameter Syntax. It adds support for: - Generic functions (def func[T](): ...) - Generic classes (class X[T](): ...) - Type aliases (type X = ...) - New scoping when the new syntax is used within a class body - Compiler and interpreter changes to support the new syntax and scoping rules Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com> Co-authored-by: Eric Traut <eric@traut.com> Co-authored-by: Larry Hastings <larry@hastings.org> Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
* gh-104454: Fix refleak in AttributeError_reduce (#104455)Charles Machalow2023-05-131-1/+3
| | | | | * Fix the reference leak introduced by https://github.com/python/cpython/issues/103333 Co-authored-by: Kirill Podoprigora <kirill.bast9@mail.ru>
* GH-94841: Fix usage of Py_ALWAYS_INLINE (GH-104409)Brandt Bucher2023-05-121-1/+1
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* gh-103333: Pickle the keyword attributes of AttributeError (#103352)Charles Machalow2023-05-121-1/+43
| | | | | | * Pickle the `name` and `args` attributes of AttributeError when present. Co-authored-by: Gregory P. Smith <greg@krypto.org> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
* GH-104371: check return value of calling `mv.release` (#104417)Kumar Aditya2023-05-121-1/+7
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* GH-103082: Filter LINE events in VM, to simplify tool implementation. ↵Mark Shannon2023-05-121-3/+0
| | | | | | | | (GH-104387) When monitoring LINE events, instrument all instructions that can have a predecessor on a different line. Then check that the a new line has been hit in the instrumentation code. This brings the behavior closer to that of 3.11, simplifying implementation and porting of tools.
* Fix refleak in `super_descr_get` (#104408)Brandt Bucher2023-05-121-1/+3
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* gh-104371: Fix calls to `__release_buffer__` while an exception is active ↵Jelle Zijlstra2023-05-121-2/+12
| | | | | (#104378) Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
* gh-87729: improve hit rate of LOAD_SUPER_ATTR specialization (#104270)Carl Meyer2023-05-111-12/+0
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* GH-102181: Improve specialization stats for SEND (GH-102182)penguin_wwy2023-05-101-3/+0
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* gh-104263: Rely on Py_NAN and introduce Py_INFINITY (GH-104202)Sebastian Berg2023-05-101-12/+1
| | | | | | | | | | This PR removes `_Py_dg_stdnan` and `_Py_dg_infinity` in favour of using the standard `NAN` and `INFINITY` macros provided by C99. This change has the side-effect of fixing a bug on MIPS where the hard-coded value used by `_Py_dg_stdnan` gave a signalling NaN rather than a quiet NaN. --------- Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
* gh-104252: Immortalize Py_EMPTY_KEYS (gh-104253)Eric Snow2023-05-101-11/+21
| | | This was missed in gh-19474. It matters for with a per-interpreter GIL since PyDictKeysObject.dk_refcnt breaks isolation and leads to races.
* gh-97933: (PEP 709) inline list/dict/set comprehensions (#101441)Carl Meyer2023-05-091-0/+4
| | | | Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
* gh-104223: Fix issues with inheriting from buffer classes (#104227)Jelle Zijlstra2023-05-083-12/+161
| | | Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
* gh-104018: remove unused format "z" handling in string formatfloat() (#104107)John Belmonte2023-05-072-5/+0
| | | This is a cleanup overlooked in PR #104033.
* gh-99113: Add a check for Py_MOD_PER_INTERPRETER_GIL_SUPPORTED (gh-104206)Eric Snow2023-05-061-1/+7
| | | Py_MOD_PER_INTERPRETER_GIL_SUPPORTED is a new supported value for Py_mod_multiple_interpreters, added in gh-104205.
* gh-99113: Add Py_MOD_PER_INTERPRETER_GIL_SUPPORTED (gh-104205)Eric Snow2023-05-052-1/+8
| | | Here we are doing no more than adding the value for Py_mod_multiple_interpreters and using it for stdlib modules. We will start checking for it in gh-104206 (once PyInterpreterState.ceval.own_gil is added in gh-104204).
* gh-104108: Add the Py_mod_multiple_interpreters Module Def Slot (gh-104148)Eric Snow2023-05-051-0/+30
| | | I'll be adding a value to indicate support for per-interpreter GIL in gh-99114.
* GH-96803: Add three C-API functions to make _PyInterpreterFrame less opaque ↵Mark Shannon2023-05-052-2/+3
| | | | for users of PEP 523. (GH-96849)
* GH-103899: Provide a hint when accidentally calling a module (GH-103900)Brandt Bucher2023-05-041-6/+38
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* gh-102500: Implement PEP 688 (#102521)Jelle Zijlstra2023-05-044-9/+292
| | | Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
* gh-104066: Improve performance of hasattr for module objects (#104063)Itamar Ostricher2023-05-042-29/+73
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* gh-103509: PEP 697 -- Limited C API for Extending Opaque Types (GH-103511)Petr Viktorin2023-05-042-3/+110
| | | | Co-authored-by: Oleg Iarygin <oleg@arhadthedev.net> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
* gh-103968: Deprecate creating heap types whose metaclass has custom tp_new. ↵Petr Viktorin2023-05-031-9/+29
| | | | | | | | (GH-103972) (That's a mouthful of an edge case!) Co-authored-by: Barney Gale <barney.gale@gmail.com>
* gh-104078: Improve performance of PyObject_HasAttrString (#104079)Itamar Ostricher2023-05-031-6/+17
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* gh-82012: Deprecate bitwise inversion (~) of bool (#103487)Tim Hoffmann2023-05-031-1/+17
| | | | | | | | | | | | | | The bitwise inversion operator on bool returns the bitwise inversion of the underlying int value; i.e. `~True == -2` such that `bool(~True) == True`. It's a common pitfall that users mistake `~` as negation operator and actually want `not`. Supporting `~` is an artifact of bool inheriting from int. Since there is no real use-case for the current behavior, let's deprecate `~` on bool and later raise an error. This removes a potential source errors for users. Full reasoning: https://github.com/python/cpython/issues/82012#issuecomment-1258705971 Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com> Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
* gh-94673: More Per-Interpreter Fields for Builtin Static Types (gh-103912)Eric Snow2023-05-022-58/+174
| | | | | his involves moving tp_dict, tp_bases, and tp_mro to PyInterpreterState, in the same way we did for tp_subclasses. Those three fields are effectively const for builtin static types (unlike tp_subclasses). In theory we only need to make their values immortal, along with their contents. However, that isn't such a simple proposition. (See gh-103823.) In the meantime the simplest solution is to move the fields into the interpreter. One alternative is to statically allocate the values, but that's its own can of worms.
* gh-94673: Hide Objects in PyTypeObject Behind Accessors (gh-104074)Eric Snow2023-05-012-234/+333
| | | This makes it much cleaner to move more PyTypeObject fields to PyInterpreterState.
* gh-94673: Properly Initialize and Finalize Static Builtin Types for Each ↵Eric Snow2023-05-018-91/+103
| | | | | Interpreter (gh-104072) Until now, we haven't been initializing nor finalizing the per-interpreter state properly.
* gh-84436: Immortalize in _PyStructSequence_InitBuiltinWithFlags() (gh-104054)Eric Snow2023-05-014-48/+63
| | | This also does some cleanup.
* gh-104018: disallow "z" format specifier in %-format of byte strings (GH-104033)John Belmonte2023-05-011-1/+0
| | | | | | | | | | | PEP-0682 specified that %-formatting would not support the "z" specifier, but it was unintentionally allowed for bytes. This PR makes use of the "z" flag an error for %-formatting in a bytestring. Issue: #104018 --------- Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
* gh-102213: Optimize the performance of `__getattr__` (GH-103761)sunmy20192023-05-011-7/+13
| | | | | Co-authored-by: Kirill <80244920+Eclips4@users.noreply.github.com> Co-authored-by: Łukasz Langa <lukasz@langa.pl> Co-authored-by: Xiang Wang <34048878+wangxiang-hz@users.noreply.github.com>
* gh-98003: Inline call frames for CALL_FUNCTION_EX (GH-98004)Ken Jin2023-04-301-12/+8
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* gh-94673: Fix _PyTypes_InitTypes() and get_type_attr_as_size() (gh-103961)Eric Snow2023-04-272-4/+1
| | | | | | This change has two small parts: 1. a follow-up to gh-103940 with one case I missed 2. adding a missing return that I noticed while working on related code
* gh-94673: Ensure Builtin Static Types are Readied Properly (gh-103940)Eric Snow2023-04-2710-107/+67
| | | There were cases where we do unnecessary work for builtin static types. This also simplifies some work necessary for a per-interpreter GIL.
* gh-103590: do not wrap a single exception raised from a try-except* (#103665)Irit Katriel2023-04-271-1/+6
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* gh-87729: specialize LOAD_SUPER_ATTR_METHOD (#103809)Carl Meyer2023-04-251-26/+58
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* gh-103826: fix unused variable warning introduced in gh-102343 (#103825)sunmy20192023-04-251-2/+2
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* gh-101659: Isolate "obmalloc" State to Each Interpreter (gh-101660)Eric Snow2023-04-242-45/+180
| | | | | | | | | | | | | | This is strictly about moving the "obmalloc" runtime state from `_PyRuntimeState` to `PyInterpreterState`. Doing so improves isolation between interpreters, specifically most of the memory (incl. objects) allocated for each interpreter's use. This is important for a per-interpreter GIL, but such isolation is valuable even without it. FWIW, a per-interpreter obmalloc is the proverbial canary-in-the-coalmine when it comes to the isolation of objects between interpreters. Any object that leaks (unintentionally) to another interpreter is highly likely to cause a crash (on debug builds at least). That's a useful thing to know, relative to interpreter isolation.
* gh-95795: Move types.next_version_tag to PyInterpreterState (gh-102343)Eric Snow2023-04-241-16/+50
| | | | | | Core static types will continue to use the global value. All other types will use the per-interpreter value. They all share the same range, where the global types use values < 2^16 and each interpreter uses values higher than that.
* gh-87729: add LOAD_SUPER_ATTR instruction for faster super() (#103497)Carl Meyer2023-04-241-28/+65
| | | | | This speeds up `super()` (by around 85%, for a simple one-level `super().meth()` microbenchmark) by avoiding allocation of a new single-use `super()` object on each use.
* gh-99184: Bypass instance attribute access in `repr` of `weakref.ref` (#99244)Nikita Sobolev2023-04-241-4/+1
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* gh-103091: Add PyUnstable_Type_AssignVersionTag (#103095)Brett Simmers2023-04-241-0/+5
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* gh-103712: Increase the length of the type name in AttributeError messages ↵Alex Gaynor2023-04-242-5/+5
| | | | (#103713)
* gh-84436: Implement Immortal Objects (gh-19474)Eddie Elizondo2023-04-228-76/+138
| | | | | | | | | This is the implementation of PEP683 Motivation: The PR introduces the ability to immortalize instances in CPython which bypasses reference counting. Tagging objects as immortal allows up to skip certain operations when we know that the object will be around for the entire execution of the runtime. Note that this by itself will bring a performance regression to the runtime due to the extra reference count checks. However, this brings the ability of having truly immutable objects that are useful in other contexts such as immutable data sharing between sub-interpreters.
* gh-83791: Raise TypeError for len(memoryview_0d) (#18463)Eric Wieser2023-04-221-1/+5
| | | Changes the behaviour of `len` on a zero-dimensional `memoryview` to raise `TypeError`. Previously, `len` would return `1`.
* gh-103092: Isolate winreg (#103250)AN Long2023-04-171-6/+0
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* GH-103082: Implementation of PEP 669: Low Impact Monitoring for CPython ↵Mark Shannon2023-04-123-137/+142
| | | | | | | | | | (GH-103083) * The majority of the monitoring code is in instrumentation.c * The new instrumentation bytecodes are in bytecodes.c * legacy_tracing.c adapts the new API to the old sys.setrace and sys.setprofile APIs
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