[3.13] gh-57141: Make shallow argument to filecmp.dircmp keyword-only (GH-121767) (#121777)
It is our general practice to make new optional parameters keyword-only,
even if the existing parameters are all positional-or-keyword. Passing
this parameter as positional would look confusing and could be error-prone
if additional parameters are added in the future.
(cherry picked from commit 50eec501fef46f0887df6f2f47d74f4defb35515)
[3.13] gh-120642: Move _PyCode_CODE() to the internal C API (GH-121644) (#121729)
gh-120642: Move _PyCode_CODE() to the internal C API (GH-121644)
Move _PyCode_CODE() and _PyCode_NBYTES() macros to the internal C API
since they use _Py_CODEUNIT which is only part of the internal C API.
(cherry picked from commit a2bec77d25b11f50362a7117223f6d1d5029a909)
Co-authored-by: Victor Stinner <vstinner@python.org>
[3.13] gh-73159 Added clarifications in multiprocessing docs on that objects are pickled. (GH-121686) (#121727)
gh-73159 Added clarifications in multiprocessing docs on that objects are pickled. (GH-121686)
Added explicit comments about that objects are pickled when transmitted via multiprocessing queues and pipes.
(cherry picked from commit b5805892d55e769335c11a994b586355720263ba)
The `allocate_weakref` may return NULL when out of memory. We need to
handle that case and propagate the error.
(cherry picked from commit a640a605a8a1a3f73b98f948d0c2a7d42134f692)
[3.13] gh-121605: Increase timeout in test_pyrepl.run_repl (GH-121606) (#121702)
We also need to close the `slave_fd` earlier so that reading from
`master_fd` won't block forever when the subprocess finishes.
(cherry picked from commit abc3aeebdbae560476f2f8c0312e9a4bf0dbfd33)
[3.13] gh-121103: Put free-threaded libraries in `lib/python3.14t` (GH-121293) (#121631)
On POSIX systems, excluding macOS framework installs, the lib directory
for the free-threaded build now includes a "t" suffix to avoid conflicts
with a co-located default build installation.
(cherry picked from commit e8c91d90ba8fab410a27fad4f709cc73f6ffcbf4)
When builtin static types are initialized for a subinterpreter, various "tp" slots have already been inherited (for the main interpreter). This was interfering with the logic in add_operators() (in Objects/typeobject.c), causing a wrapper to get created when it shouldn't. This change fixes that by preserving the original data from the static type struct and checking that.
[3.13] gh-121592: Make select.poll() and related objects thread-safe (GH-121594) (#121623)
This makes select.poll() and kqueue() objects thread-safe in the
free-threaded build. Note that calling close() concurrently with other
functions is still not thread-safe due to races on file descriptors
(gh-121544).
(cherry picked from commit 44937d11a6a045a624918db78aa36e715ffabcd4)
[3.13] gh-117657: Remove TSAN suppressions for _abc.c (GH-121508) (#121598)
The functions look thread-safe and I haven't seen any warnings issued
when running the tests locally.
(cherry picked from commit 7641743d48b276de88a709ad40d715b6c5d7a2ea)
[3.13] gh-117657: Fix TSan race in _PyDict_CheckConsistency (GH-121551) (#121590)
The only remaining race in dictobject.c was in _PyDict_CheckConsistency
when the dictionary has shared keys.
(cherry picked from commit 3ec719fabf936ea7a012a76445b860759155de86)
[3.13] gh-89364: Export PySignal_SetWakeupFd() function (GH-121537) (#121582)
gh-89364: Export PySignal_SetWakeupFd() function (GH-121537)
Export the PySignal_SetWakeupFd() function. Previously, the function
was documented but it couldn't be used in 3rd party code.
(cherry picked from commit ca0fb3423c13822d909d75eb616ecf1965e619ae)
Co-authored-by: Victor Stinner <vstinner@python.org>
[3.13] GH-121439: Allow PyTupleObjects with an ob_size of 20 in the free_list to be reused (gh-121428) (gh-121565)
GH-121439: Allow PyTupleObjects with an ob_size of 20 in the free_list to be reused (gh-121428)
(cherry picked from commit 9585a1a2a251aaa15baf6579e13dd3be0cb05f1f)
[3.13] GH-120372: Switch to wasmtime 22 (GH-121523) (GH-121557)
GH-120372: Switch to wasmtime 22 (GH-121523)
Along the way, make the cache key in GitHub Actions for `config.cache` be more robust in the face of potential env var changes from `Tools/wasm/wasi.py`.
(cherry picked from commit 80209468144fbd1af5cd31f152a6631627a9acab)
[3.13] gh-117657: Fix TSAN races in setobject.c (GH-121511) (#121541)
The `used` field must be written using atomic stores because `set_len`
and iterators may access the field concurrently without holding the
per-object lock.
(cherry picked from commit 9c08f40a613d9aee78de4ce4ec3e125d1496d148)
[3.13] gh-121110: Fix Extension Module Tests Under Py_TRACE_REFS Builds (gh-121517)
The change in gh-118157 (b2cd54a) should have also updated clear_singlephase_extension() but didn't. We fix that here. Note that clear_singlephase_extension() (AKA _PyImport_ClearExtension()) is only used in tests.
The `_PySeqLock_EndRead` function needs an acquire fence to ensure that
the load of the sequence happens after any loads within the read side
critical section. The missing fence can trigger bugs on macOS arm64.
Additionally, we need a release fence in `_PySeqLock_LockWrite` to
ensure that the sequence update is visible before any modifications to
the cache entry.
(cherry picked from commit 1d3cf79a501a93a7a488fc75d4db3060c5ee7d1a)
[3.13] gh-121359: Run test_pyrepl in isolated mode (GH-121414) (#121417)
gh-121359: Run test_pyrepl in isolated mode (GH-121414)
run_repl() now pass the -I option (isolated mode) to Python if the
'env' parameter is not set.
(cherry picked from commit 6239d41527d5977aa5d44e4b894d719bc045860e)
Co-authored-by: Victor Stinner <vstinner@python.org>
[3.13] Update example of str.split, bytes.split (GH-121287) (#121415)
Update example of str.split, bytes.split (GH-121287)
In `{str,bytes}.strip(chars)`, multiple characters are not treated as a
prefix/suffix, but as individual characters. This may make users confuse
whether `split` has similar behavior.
Users may incorrectly expect that
`'Good morning, John.'.split(', .') == ['Good', 'morning', 'John']`
Co-authored-by: Ali Tavallaie <tavallaie@users.noreply.github.com> Co-authored-by: Éric <merwok@netwok.org> Co-authored-by: Frank Dana <ferdnyc@gmail.com>
[3.13] gh-121084: Fix test_typing random leaks (GH-121360) (#121373)
gh-121084: Fix test_typing random leaks (GH-121360)
Clear typing ABC caches when running tests for refleaks (-R option):
call _abc_caches_clear() on typing abstract classes and their
subclasses.
(cherry picked from commit 5f660e8e2ca3acfb89ccbdd990f072149b6baa6a)
Co-authored-by: Victor Stinner <vstinner@python.org>
[3.13] gh-117983: Defer import of threading for lazy module loading (GH-120233) (GH-121349)
gh-117983: Defer import of threading for lazy module loading (GH-120233)
As noted in gh-117983, the import importlib.util can be triggered at
interpreter startup under some circumstances, so adding threading makes
it a potentially obligatory load.
Lazy loading is not used in the stdlib, so this removes an unnecessary
load for the majority of users and slightly increases the cost of the
first lazily loaded module.
An obligatory threading load breaks gevent, which monkeypatches the
stdlib. Although unsupported, there doesn't seem to be an offsetting
benefit to breaking their use case.
For reference, here are benchmarks for the current main branch:
```
❯ hyperfine -w 8 './python -c "import importlib.util"'
Benchmark 1: ./python -c "import importlib.util"
Time (mean ± σ): 9.7 ms ± 0.7 ms [User: 7.7 ms, System: 1.8 ms]
Range (min … max): 8.4 ms … 13.1 ms 313 runs
```
And with this patch:
```
❯ hyperfine -w 8 './python -c "import importlib.util"'
Benchmark 1: ./python -c "import importlib.util"
Time (mean ± σ): 8.4 ms ± 0.7 ms [User: 6.8 ms, System: 1.4 ms]
Range (min … max): 7.2 ms … 11.7 ms 352 runs
```
Compare to:
```
❯ hyperfine -w 8 './python -c pass'
Benchmark 1: ./python -c pass
Time (mean ± σ): 7.6 ms ± 0.6 ms [User: 5.9 ms, System: 1.6 ms]
Range (min … max): 6.7 ms … 11.3 ms 390 runs
```
[3.13] gh-121035: Further improve logging flow diagram with respect to dark/light modes. (GH-121265) (GH-121320)
[3.13] gh-121035: Further improve logging flow diagram with respect to dark/light modes. (GH-121265)
(cherry picked from commit 089835469d5efbea4793cd611b43cb8387f2e7e5)
[3.13] gh-106597: Add more offsets to _Py_DebugOffsets (GH-121311) (#121312)
gh-106597: Add more offsets to _Py_DebugOffsets (GH-121311)
Add more offsets to _Py_DebugOffsets
We add a few more offsets that are required by some out-of-process
tools, such as [Austin](https://github.com/p403n1x87/austin).
(cherry picked from commit c9bdfbe86853fcf5f2b7dce3a50b383e23384ed2)
Co-authored-by: Gabriele N. Tornetta <P403n1x87@users.noreply.github.com>
[3.13] gh-120782: Update internal type cache when reloading datetime (GH-120829) (#120855)
* [3.13] gh-120782: Update internal type cache when reloading datetime
When reloading _datetime module, the single-phase version did not invoke the PyInit__datetime function, whereas the current multi-phase version updates the static types through the module init. The outdated static type cache in the interpreter state needs to be invalidated at the end of reloading the multi-phase module.
[3.13] gh-116181: Remove Py_BUILD_CORE_BUILTIN and Py_BUILD_CORE_MODULE in rotatingtree.c (GH-121260) (#121307)
gh-116181: Remove Py_BUILD_CORE_BUILTIN and Py_BUILD_CORE_MODULE in rotatingtree.c (GH-121260)
(cherry picked from commit 705a123898f1394b62076c00ab6008c18fd8e115)
Co-authored-by: AN Long <aisk@users.noreply.github.com>
[3.13] gh-121200: Log pwd entry in test_expanduser_pwd2() (GH-121207) (#121213)
gh-121200: Log pwd entry in test_expanduser_pwd2() (GH-121207)
Use subTest() to log the pwd entry in test_expanduser_pwd2() of
test_posixpath to help debugging.
(cherry picked from commit 05a6f8da6042cc87da1cd3824c1375d12753e5a1)
Co-authored-by: Victor Stinner <vstinner@python.org>
[3.13] gh-121188: Sanitize invalid XML characters in regrtest (GH-121195) (#121204)
gh-121188: Sanitize invalid XML characters in regrtest (GH-121195)
When creating the JUnit XML file, regrtest now escapes characters
which are invalid in XML, such as the chr(27) control character used
in ANSI escape sequences.
(cherry picked from commit af8c3d7a26d605099f5b3406a8d33ecddb77e8fb)
Co-authored-by: Victor Stinner <vstinner@python.org>
[3.13] gh-113565: Improve and harden detection of curses dependencies (GH-119816) (#121202)
1. Use pkg-config to check for ncursesw/panelw. If that fails, use
pkg-config to check for ncurses/panel.
2. Regardless of pkg-config output, search for curses/panel headers, so
we're sure we have all defines in pyconfig.h.
3. Regardless of pkg-config output, check if libncurses or libncursesw
contains the 'initscr' symbol; if it does _and_ pkg-config failed
earlier, add the resulting -llib linker option to CURSES_LIBS.
Ditto for 'update_panels' and PANEL_LIBS.
4. Wrap the rest of the checks with WITH_SAVE_ENV and make sure we're
using updated LIBS and CPPFLAGS for those.
[3.13] gh-87744: fix waitpid race while calling send_signal in asyncio (GH-121126) (#121194)
gh-87744: fix waitpid race while calling send_signal in asyncio (GH-121126)
asyncio earlier relied on subprocess module to send signals to the process, this has some drawbacks one being that subprocess module unnecessarily calls waitpid on child processes and hence it races with asyncio implementation which internally uses child watchers. To mitigate this, now asyncio sends signals directly to the process without going through the subprocess on non windows systems. On Windows it fallbacks to subprocess module handling but on windows there are no child watchers so this issue doesn't exists altogether.
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