The only remaining race in dictobject.c was in _PyDict_CheckConsistency
when the dictionary has shared keys.
(cherry picked from commit 3ec719fabf)
Co-authored-by: Sam Gross <colesbury@gmail.com>
`munmap(NULL)` is not noop, like `free(NULL)` is.
Fixes an observed testsuite hang on 32-bit ARM systems.
(cherry picked from commit a802277914, AKA gh-121491)
Co-authored-by: Stefano Rivera <stefano@rivera.za.net>
On heavily loaded machines, the subprocess may finish its sleep before
the parent process manages to synchronize with it via a failed lock.
This leads to errors like:
Exception: failed to sync child in 300.3 sec
Use pipes instead to mutually synchronize between parent and child.
(cherry picked from commit af9f6de6ea)
Co-authored-by: Sam Gross <colesbury@gmail.com>
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 ca0fb3423c)
Co-authored-by: Victor Stinner <vstinner@python.org>
gh-121571: Do not use `EnvironmentError` in tests, use `OSError` instead (GH-121572)
(cherry picked from commit e2822360da)
Co-authored-by: sobolevn <mail@sobolevn.me>
GH-121439: Allow PyTupleObjects with an ob_size of 20 in the free_list to be reused (gh-121428)
(cherry picked from commit 9585a1a2a2)
Co-authored-by: satori1995 <132636720+satori1995@users.noreply.github.com>
GH-121521: Detect when wasmtime is not installed in `Tools/wasm/wasi.py` (GH-121522)
(cherry picked from commit f62161837e)
Co-authored-by: Brett Cannon <brett@python.org>
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 8020946814)
Co-authored-by: Brett Cannon <brett@python.org>
gh-117657: Skip test when running under TSan (GH-121549)
The ProcessPoolForkserver combined with resource_tracker starts a thread
after forking, which is not supported by TSan.
Also skip test_multiprocessing_fork for the same reason
(cherry picked from commit 04397434aa)
Co-authored-by: Sam Gross <colesbury@gmail.com>
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 9c08f40a61)
Co-authored-by: Sam Gross <colesbury@gmail.com>
gh-121333: Clarify what is the default executor for asyncio.run_in_executor (GH-121335)
(cherry picked from commit facf9862da)
Co-authored-by: AN Long <aisk@users.noreply.github.com>
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
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.
(cherry picked from commit 15d48aea02, AKA gh-121503)
Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
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 1d3cf79a50)
Co-authored-by: Sam Gross <colesbury@gmail.com>
gh-121467: Fix makefile to include mimalloc headers (GH-121469)
(cherry picked from commit 5aa1e60e0c)
Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
gh-121351: Skip test_not_wiping_history_file() if no readline (GH-121422)
(cherry picked from commit 68e279b37a)
Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>
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 6239d41527)
Co-authored-by: Victor Stinner <vstinner@python.org>
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']`
Adding a bit of clarification in the doc.
(cherry picked from commit 892e3a1b70)
Co-authored-by: Yuxin Wu <ppwwyyxxc@gmail.com>
Co-authored-by: Yuxin Wu <ppwwyyxx@users.noreply.github.com>
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 5f660e8e2c)
Co-authored-by: Victor Stinner <vstinner@python.org>
gh-121201: Disable perf_trampoline on riscv64 for now (GH-121328)
Disable perf_trampoline on riscv64 for now
Until support is added in perf_jit_trampoline.c
gh-120089 was incomplete.
(cherry picked from commit ca2e876500)
Co-authored-by: Stefano Rivera <stefano@rivera.za.net>
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
```
This roughly halves the import time of importlib.util.
(cherry picked from commit 94f50f8ee6)
Co-authored-by: Chris Markiewicz <effigies@gmail.com>
gh-118714: Make the pdb post-mortem restart/quit behavior more reasonable (GH-118725)
(cherry picked from commit e245ed7d1e)
Co-authored-by: Tian Gao <gaogaotiantian@hotmail.com>
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 c9bdfbe868)
Co-authored-by: Gabriele N. Tornetta <P403n1x87@users.noreply.github.com>
docs: Fix "Py_TPFLAGS_MANAGED_WEAKREF is set in tp_flags" (GH-112237)
(cherry picked from commit 4232976b02)
Co-authored-by: da-woods <dw-git@d-woods.co.uk>
Miss Islington (bot)
Serhiy Storchaka
Steve Dower
Vinay Sajip
Victor Stinner
Miro Hrončok