de9c32fc34
PEP 810 - Update some error strings ( #150126 )
2026-05-20 00:47:44 +00:00
1f3c2679f1
gh-149321: Remove lazy_imports=none startup mode ( #149389 )
2026-05-19 16:01:15 -07:00
409fa8e1f3
gh-150027: Avoid copying during construction of frozenset objects (GH-150028)
2026-05-19 13:57:37 -04:00
18281db0d0
gh-144140: Optimize len for frozen dict/set constants in optimizer ( #149969 )
2026-05-18 12:20:42 +05:30
6ee879ffa1
gh-138325: steal list items in INTRINSIC_LIST_TO_TUPLE opcode ( #149960 )
2026-05-18 12:07:12 +05:30
c575172425
gh-149879: Fix sys.orig_argv[0] on Cygwin: add ".exe" suffix ( #149885 )
2026-05-15 15:55:34 +00:00
50476a7e87
gh-148758: Fix dynamic loading file extensions for Cygwin ( #148759 )
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Co-authored-by: Victor Stinner <vstinner@python.org >
2026-05-13 21:50:24 +00:00
125f26358a
gh-149685: Use the _Py prefix for private C macros (GH-149686)
2026-05-13 19:14:05 +02:00
4087ff8599
gh-149642: Fix interaction between exec and lazy_imports=all ( #149643 )
2026-05-12 19:59:09 -07:00
1a79fd0ad6
GH-149501: Fix compilation warning in _YIELD_VALUE uop ( #149502 )
2026-05-12 22:47:35 +05:30
6a0be131c3
gh-149595: Remove the sys._enablelegacywindowsfsencoding() function ( #149596 )
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Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com >
2026-05-12 17:11:34 +01:00
da8477b25c
gh-139808: Add branch protections for aarch64 in asm_trampoline.S ( #130864 )
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Apply protection against ROP/JOP attacks for aarch64 on asm_trampoline.S.
The BTI flag must be applied in assembler sources for this class
of attacks to be mitigated on newer aarch64 processors.
See also:
https://sourceware.org/annobin/annobin.html/Test-branch-protection.html
and
https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/enabling-pac-and-bti-on-aarch64
Co-authored-by: Victor Stinner <vstinner@python.org >
2026-05-12 15:42:44 +00:00
8a4895985f
gh-145235: Make dict watcher API thread-safe for free-threaded builds (gh-145233)
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In free-threaded builds, concurrent calls to PyDict_AddWatcher, PyDict_ClearWatcher, PyDict_Watch, and PyDict_Unwatch can race on the shared callback array and the per-dict watcher tags. This change adds a mutex to serialize watcher registration and removal, atomic operations for tag updates, and atomic acquire/release synchronization for callback dispatch in _PyDict_SendEvent.
2026-05-11 11:39:55 -04:00
c341e341b2
gh-149459: Fix segfault when _LOAD_SPECIAL guard deoptimizes ( #149478 )
2026-05-08 11:20:27 +00:00
d2d24e46d3
gh-100239: expose sq_repeat helpers for BINARY_OP_EXTEND ( #148791 )
2026-05-08 11:12:20 +00:00
49918f5b0c
gh-149481: skip FOR_ITER inline specialization for Python __next__ ( #149491 )
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Co-authored-by: Savannah Ostrowski <savannah@python.org >
Co-authored-by: Stan Ulbrych <stan@python.org >
2026-05-07 23:02:04 +00:00
13188dbf85
gh-148937: revert process RSS based GC deferral ( #149475 )
2026-05-07 14:32:14 +03:00
2b7c28a440
gh-149101: Implement PEP 788 (GH-149116)
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Co-authored-by: Petr Viktorin <encukou@gmail.com >
Co-authored-by: Sam Gross <colesbury@gmail.com >
2026-05-06 17:39:30 -04:00
646853df13
gh-145559: Add PyUnstable_DumpTraceback() and PyUnstable_DumpTracebackThreads() ( #148145 )
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Co-authored-by: Petr Viktorin <encukou@gmail.com >
Co-authored-by: Victor Stinner <vstinner@python.org >
2026-05-06 15:01:12 +00:00
1bdfc0f253
gh-146270: Fix PyMember_SetOne(..., NULL) not being atomic (gh-148800)
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Fixes a sequential consistency bug whereby two threads that are deleting a struct member may observe both their deletions to be successful.
2026-05-06 09:50:24 -04:00
e7613f2735
gh-148766: Add colour to Python help ( #148767 )
2026-05-06 16:48:04 +03:00
0b75b7338d
gh-100239: specialize mixed int/float inplace binary ops (GH-149413)
2026-05-06 13:59:08 +01:00
70bd1c2dd2
GH-143732: SEND specialization (GH-148963)
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* SEND specialization. Adds 2 new specialized instructions:
* SEND_VIRTUAL: for sends to virtual iterators e.g lists and tuples
* SEND_ASYNC_GEN: for sends to async generators
Tweak FOR_ITER_VIRTUAL so that SEND_VIRTUAL and FOR_ITER_VIRTUAL use equivalent guards
2026-05-05 15:19:16 +01:00
1e5d94274d
GH-126910: Add GNU backtrace support for unwinding JIT frames ( #149104 )
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Co-authored-by: Pablo Galindo Salgado <pablogsal@gmail.com >
2026-05-05 09:29:07 +01:00
508b49845d
gh-149044: Implement PEP 820 – PySlot: Unified slot system for the C API (GH-149055)
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Co-authored-by: Peter Bierma <zintensitydev@gmail.com >
2026-05-05 09:18:04 +02:00
2995d45659
gh-137293: Ignore Exceptions when searching ELF File in Remote Debug ( #137309 )
2026-05-05 01:51:39 +01:00
9a268e3e33
gh-98894: Restore function entry/exit DTrace probes ( #142397 )
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The function__entry and function__return probes stopped working in Python 3.11
when the interpreter was restructured around the new bytecode system. This change
restores these probes by adding DTRACE_FUNCTION_ENTRY() at the start_frame label
in bytecodes.c and DTRACE_FUNCTION_RETURN() in the RETURN_VALUE and YIELD_VALUE
instructions. The helper functions are defined in ceval.c and extract the
filename, function name, and line number from the frame before firing the probe.
This builds on the approach from https://github.com/python/cpython/pull/125019
but avoids modifying the JIT template since the JIT does not currently support
DTrace. The macros are conditionally compiled with WITH_DTRACE and are no-ops
otherwise. The tests have been updated to use modern opcode names (CALL, CALL_KW,
CALL_FUNCTION_EX) and a new bpftrace backend was added for Linux CI alongside
the existing SystemTap tests. Line probe tests were removed since that probe
was never restored after 3.11.
2026-05-05 00:29:55 +00:00
e89568f0cb
GH-148726: Add heap_size to generational GC ( #149195 )
2026-05-04 22:14:45 +01:00
10f950c9bb
gh-148690: Build Windows freethreaded binaries into separate directory and include python3t.dll on GIL-enabled (GH-149218)
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Co-authored-by: Petr Viktorin <encukou@gmail.com >
2026-05-04 17:45:08 +01:00
9846407eaf
gh-143732: add specialization for FOR_ITER (GH-148745)
2026-05-04 17:29:10 +01:00
952784af47
gh-137030: Fix YIELD_VALUE bytecode assertion ( #149184 )
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Co-authored-by: Mark Shannon <mark@hotpy.org >
2026-05-04 18:09:57 +02:00
72f29dc704
gh-147998: Fix possible memory leak in _pop_preserved (crossinterp.c) (GH-147999)
2026-05-04 16:45:31 +03:00
c3972f2795
gh-148418: Fix a possible reference leak in a corrupted TYPE_CODE marshal stream (GH-148419)
2026-05-04 16:42:02 +03:00
5847931d11
gh-143732: allow dict subclasses to be specialized (GH-148128)
2026-05-04 09:39:03 +01:00
726a17e265
gh-149243: Check for recursion limits in CALL_ALLOC_AND_ENTER_INIT ( #149310 )
2026-05-03 13:26:05 +03:00
8a7eddaa84
gh-149217: Avoid adding dependencies on immutable, immortal classes in the JIT (GH149256)
2026-05-03 11:06:39 +01:00
00c4a946f4
gh-143231: Add the module attribute to warnings.WarningMessage (GH-149298)
2026-05-03 09:35:47 +00:00
7c9ad27dd1
gh-148871: extend and improve LOAD_COMMON_CONSTANT (GH-148971)
2026-05-02 19:59:51 +01:00
bdedc4a20e
gh-116021: Deprecate support for instantiating abstract AST nodes ( #137865 )
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Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com >
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com >
2026-05-02 09:50:06 -07:00
98afa03522
gh-149282: Fix gc.c compilation with --enable-pystats ( #149283 )
2026-05-02 18:24:17 +03:00
39f123c587
GH-146527: Add get_gc_stats function to _remote_debugging ( #148071 )
2026-05-02 15:04:18 +00:00
2ca6333065
gh-148380: remove all uses of _PyType_LookupByVersion in optimizer_bytecodes.c (GH-148394)
2026-05-02 15:45:38 +01:00
c7b7ca2cd5
GH-126910: Add gdb support for unwinding JIT frames ( #146071 )
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Co-authored-by: Pablo Galindo Salgado <pablogsal@gmail.com >
2026-05-02 13:42:03 +00:00
0102c1d9b9
gh-149204: add _RROT_3 uop to reduce stack moves (GH-149205)
2026-05-01 12:35:31 +01:00
1575a81bf2
GH-148726: Forward-port generational GC. (GH-148746)
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The replaces the incremental GC with a forward port (from 3.13) of the generational GC.
Co-Authored-By: Neil Schemenauer <nas@arctrix.com >
Co-Authored-By: Zanie Blue <contact@zanie.dev >
Co-Authored-By: Sergey Miryanov <sergey.miryanov@gmail.com >
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com >
2026-04-30 12:19:13 -07:00
7686abe063
gh-149085: Add max_threads keyword to faulthandler.dump_traceback() (GH-149106)
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Add a keyword-only `max_threads` argument to `dump_traceback()` and
`dump_traceback_later()`, defaulting to 100 to preserve existing
behavior. Allows server processes with many worker threads to dump
beyond the historical 100-thread cap (previously a hardcoded
`MAX_NTHREADS = 100` in `Python/traceback.c`).
The cap matters in practice: tstates are prepended to the
PyInterpreterState linked list, so the dump walks newest-first. With
more than 100 threads alive, the main thread (oldest, at the tail) is
silently elided from watchdog dumps -- exactly the thread that's
usually wanted.
The hardcoded value is moved to a new internal macro
`_Py_TRACEBACK_MAX_NTHREADS` in `pycore_traceback.h` so the in-tree
fatal-signal callers all reference one source of truth.
2026-04-30 09:27:57 -04:00
4599335a83
gh-149122: Fix refleak in codegen (GH-149179)
2026-04-30 10:05:48 +00:00
7fe51ceae8
gh-149049: Fix jit binary op stack underflow (GH-149076)
2026-04-30 10:36:04 +01:00
16f292ef4e
gh-149122: Fix segfault in compiler when certain builtin functions are passed a coroutine as arg ( #149138 )
2026-04-29 13:35:51 +00:00
2b6a13710f
gh-148211: decompose _SHUFFLE_3_LOAD_CONST_INLINE_BORROW in JIT (GH-148816)
2026-04-28 13:48:23 +01:00
Tim Stumbaugh