Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>
Co-authored-by: Brandt Bucher <brandt@python.org>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
* Add terminator to JIT code when halting due to invalid dependencies
* 📜🤖 Added by blurb_it.
---------
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
* gh-143010: Prevent a TOCTOU issue by gh-143010: Prevent a TOCTOU issue by only calling open once
RDM: per AZero13's research the 'x' option did not exist when this code was written, This
modernization can thus drop the fd trick in _create_carefully and just use open with 'x' to achieve the same goal more securely.
Co-authored-by: sobolevn <mail@sobolevn.me>
mmapmodule: remove unreachable code in Windows error path
Remove an unreachable `return NULL` after `PyErr_SetFromWindowsErr()` in
the Windows mmap resize error path.
Signed-off-by: Yongtao Huang <yongtaoh2022@gmail.com>
* gh-70647: Better promote how to safely parse yearless dates in datetime.
Every four years people encounter this because it just isn't obvious.
This moves the footnote up to a note with a code example.
We'd love to change the default year value for datetime but doing
that could have other consequences for existing code. This documented
workaround *always* works.
* doctest code within note is bad, dedent.
* Update to match the error message.
* remove no longer referenced footnote
* ignore the warning in the doctest
* use Petr's suggestion for the docs to hide the warning processing
* cover date.strptime (3.14) as well
The use of memmove and _Py_memory_repeat were not thread-safe in the
free threading build in some cases. In theory, memmove and
_Py_memory_repeat can copy byte-by-byte instead of pointer-by-pointer,
so concurrent readers could see uninitialized data or tearing.
Additionally, we should be using "release" (or stronger) ordering to be
compliant with the C11 memory model when copying objects within a list.
This makes generator frame state transitions atomic in the free
threading build, which avoids segfaults when trying to execute
a generator from multiple threads concurrently.
There are still a few operations that aren't thread-safe and may crash
if performed concurrently on the same generator/coroutine:
* Accessing gi_yieldfrom/cr_await/ag_await
* Accessing gi_frame/cr_frame/ag_frame
* Async generator operations
If *a* is an integer, the sign of *a* is discarded in the C source code. Clarify this behavior to prevent foot guns, where a common use case might naively assume that flipping the sign will produce different sequences (e.g. for a train/test split of a synthetic data generator in machine learning).
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Now that we specialize range iteration in the interpreter for the common
case where the iterator has only one reference, there's not a
significant performance cost to making the iteration thread-safe.
The bytecode panel appears when a user generates a heatmap with
--opcodes and clicks the button to unfold a line and display the
bytecode instructions. Currently, an empty space appears on the
left where the line number, self, and total columns are displayed.
This area should instead extend those columns, rather than leaving
a gap.
