Docs: except with multiple exceptions parentheses not required (GH-145848)
As of PEP 758 the except statement doesn't require parentheses anymore for exception tuples.
(cherry picked from commit 6d1e9ceed3)
See: https://peps.python.org/pep-0758/
Co-authored-by: Maurizio Sambati <duilio@users.noreply.github.com>
gh-145801: Use gcc -fprofile-update=atomic for PGO builds (GH-145802)
When Python build is optimized with GCC using PGO, use
-fprofile-update=atomic option to use atomic operations when updating
profile information. This option reduces the risk of gcov Data Files
(.gcda) corruption which can cause random GCC crashes.
(cherry picked from commit 08a018ebe0)
Co-authored-by: Victor Stinner <vstinner@python.org>
Avoid locking in the PyType_Lookup cache-miss path if the type's
tp_version_tag is already valid.
(cherry picked from commit cd52172831)
Co-authored-by: Sam Gross <colesbury@gmail.com>
gh-140594: Fix an out of bounds read when feeding NUL byte to PyOS_StdioReadline() (GH-140910)
(cherry picked from commit 86a0756234)
Co-authored-by: Shamil <ashm.tech@proton.me>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
(cherry picked from commit 2d35f9bc1c)
Includes test fix-up from GH-145788
(cherry picked from commit aa4240ebea)
Co-authored-by: Thomas Kowalski <thom.kowa@gmail.com>
Co-authored-by: Matt Van Horn <mvanhorn@users.noreply.github.com>
(cherry picked from commit eb9ae65e5b)
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>
gh-145607: Ensure BIG_DATA has two compressed blocks in test_bz2 (GH-145730)
(cherry picked from commit 19676e5fc2)
Co-authored-by: Emma Smith <emma@emmatyping.dev>
Modifies the Emscripten build script to allow for caching of dependencies, and
for automated installation of new EMSDK versions.
(cherry picked from commit ebb150e76a)
Co-authored-by: Hood Chatham <roberthoodchatham@gmail.com>
Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>
The cache may be cleared between the evaluation of the if statement and the
call to popitem.
(cherry picked from commit 665c1db94f)
Co-authored-by: Sam Gross <colesbury@gmail.com>
gh-144173: fix flaky test_complex.test_truediv() (GH-144355)
Previously, component-wise relative error bound was tested. However,
such bound can't exist already for complex multiplication as one can be
used to perform subtraction of floating-point numbers, e.g. x and y for
z0=1+1j and z1=x+yj.
```pycon
>>> x, y = 1e-9+1j, 1+1j
>>> a = x*y*y.conjugate()/2;a
(1.0000000272292198e-09+1j)
>>> b = x*(y*y.conjugate()/2);b
(1e-09+1j)
>>> b == x
True
>>> (a.real-b.real)/math.ulp(b.real)
131672427.0
```
(cherry picked from commit c4333a1270)
Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>
Only set the format attribute after successful (re-)initialization.
(cherry picked from commit 3f33bf83e8)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Docs: Improve the C API documentation involving threads (GH-145520)
(cherry picked from commit 7990313afa)
Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Savannah Ostrowski <savannah@python.org>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Stan Ulbrych <stan@ulbrych.org>
We already have a stop-the-world pause elsewhere in this code path
(type_set_bases) and this makes will make it easier to avoid contention
on the TYPE_LOCK when looking up names in the MRO hierarchy.
Also use deferred reference counting for non-immortal MROs.
(cherry picked from commit 0b65c88c2a)
gh-142651: use `NonCallableMock._lock` for thread safety of `call_count` (GH-142922)
(cherry picked from commit 728e4a075e)
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
(cherry picked from commit 63eaaf9599)
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
* Add `:oss-fuzz:` supports
Backports part of 255e79fa95.
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Fix three issues that caused mimalloc pages to be leaked until the
owning thread exited:
1. In _PyMem_mi_page_maybe_free(), move pages out of the full queue
when relying on QSBR to defer freeing the page. Pages in the full
queue are never searched by mi_page_queue_find_free_ex(), so a page
left there is unusable for allocations.
2. Move _PyMem_mi_page_clear_qsbr() from _mi_page_free_collect() to
_mi_page_thread_free_collect() where it only fires when all blocks
on the page are free (used == 0). The previous placement was too
broad: it cleared QSBR state whenever local_free was non-NULL, but
_mi_page_free_collect() is called from non-allocation paths (e.g.,
page visiting in mi_heap_visit_blocks) where the page is not being
reused.
3. In _PyMem_mi_page_maybe_free(), use the page's heap tld to find the
correct thread state for QSBR list insertion instead of
PyThreadState_GET(). During stop-the-world pauses, the function may
process pages belonging to other threads, so the current thread
state is not necessarily the owner of the page.
(cherry picked from commit d76df75f51)
Co-authored-by: Sam Gross <colesbury@gmail.com>
