…reads (pythonGH-155828) (python#158829)

* update_seq

* no need for XCHGL, MOVL is enough?

* pythongh-155811: Retry an inconsistent GC snapshot once

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(cherry picked from commit 5fecd44)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
(cherry picked from commit 0281240)

…y file when hitting `OverflowError` (pythonGH-152892) (python#158830)

pythongh-151292: `_remote_debugging`: Do not corrupt the binary file when hitting `OverflowError` (pythonGH-152892)

* the kolektor

* test

* better test

* news

* =Q, move const to the base, not self.running

* pythongh-151292: Track binary writer finalization state

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(cherry picked from commit f839c06)

Co-authored-by: Maurycy Pawłowski-Wieroński <maurycy@maurycy.com>
Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
(cherry picked from commit 8a7c23f)

…x() (pythonGH-158584) (python#158691)

pythongh-158583: Fix uninitialized memory read in bytes.fromhex() (pythonGH-158584)
(cherry picked from commit 9d22a53)

Co-authored-by: Victor Stinner <vstinner@python.org>
(cherry picked from commit 4f7af46)

…the sample (pythonGH-154195) (python#158831)

* pythongh-154194: Degrade frames in Tachyon instead of failing the sample (python#154195)

* degrade gracefully

* news

* better NEWS wording

* do not raise on MAX_REMOTE_STR_READ

* bye MAX_REMOTE_STR_READ

* fix -m asyncio ps|pstree

* test truncation and linetable sentinel

* simpler

* simpler

* redundant now

* respect python#157790 in the news

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Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
(cherry picked from commit 7d25916)

* Preserve the stable ABI when creating fallback frame names

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Co-authored-by: Maurycy Pawłowski-Wieroński <maurycy@maurycy.com>
(cherry picked from commit c27f494)

Run a job that the test suite with MSan to the CI (python#158625)

* Run the test suite with MSan in CI

* Additional fixes

* Add `_Py_MSAN_UNPOISON_STRING`

* Apply Victor's suggestions

* Apply Victor's suggestions

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(cherry picked from commit b93fb19)

Co-authored-by: Stan Ulbrych <stan@python.org>
Co-authored-by: Victor Stinner <victor.stinner@gmail.com>
(cherry picked from commit 1bc78de)

…s UTF-8 (pythonGH-156811) (python#156814)

pythongh-156810: Write the profiler's collapsed-stack export as UTF-8 (pythonGH-156811)
(cherry picked from commit c3706f4)

Co-authored-by: tonghuaroot (童话) <tonghuaroot@gmail.com>
(cherry picked from commit fce28da)

…ocking sampling (pythonGH-158802) (python#158845)

pythongh-158552: Wait for Windows threads to suspend before blocking sampling (pythonGH-158802)

* pythongh-158552: Wait for Windows threads to suspend before blocking sampling

* Use a named Windows thread enumeration status constant
(cherry picked from commit 1643525)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
(cherry picked from commit 31288da)

…g binary reader (pythonGH-152722) (python#158850)

Backport of pythonGH-152722.

Co-authored-by: tonghuaroot <tonghuaroot@gmail.com>
(cherry picked from commit ebaca2a)

…y recursive programs (pythonGH-156546) (python#158851)

Backport of pythonGH-156546.

Co-authored-by: tonghuaroot (童话) <tonghuaroot@gmail.com>
(cherry picked from commit 0ac7217)

…th (pythonGH-158548) (python#158844)

pythongh-158540: Add the profiled script's directory to sys.path (pythonGH-158548)

* pythongh-158540: Add the profiled script's directory to sys.path

When a script is profiled with ``python -m profiling.sampling run
script.py`` from another directory, the script cannot import modules
placed next to it, because ``_sync_coordinator._execute_script()``
executes it with the working directory (added by
``_setup_environment()`` for the module case) as ``sys.path[0]``
instead of the script's own directory.

Make the script's directory importable in ``_execute_script()``,
matching the behavior of ``python script.py``.

Add a regression test that runs the coordinator on a script importing
a sibling module.

* Update _sync_coordinator.py Comment simplified

* pythongh-158540: Resolve symlinks when adding the script directory to sys.path

``python script.py`` resolves symlinks when computing ``sys.path[0]``, so
a script reached through a symlink (``link.py -> sub/where.py``) imports
modules from the real script's directory.  Apply ``os.path.realpath()``
before taking the directory name, and make sure the result is placed at
the front of ``sys.path`` even if it was already listed.

Add a regression test for a symlinked script.

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(cherry picked from commit 3f02aab)

Co-authored-by: he_tao <53343436+hetaozdh@users.noreply.github.com>
Co-authored-by: Eduardo Villalpando Mello <eduardo.villalpando.mello@gmail.com>
(cherry picked from commit f52d831)

…exporter (pythonGH-153839) (python#158853)

Backport of pythonGH-153839.

Co-authored-by: tonghuaroot <tonghuaroot@gmail.com>
(cherry picked from commit 48998df)

…tors/coroutines (pythonGH-158581) (python#158852)

* [3.15] pythongh-158539: Fix exception mode missing handlers in generators/coroutines (pythonGH-158581)

Backport of pythonGH-158581.

Co-authored-by: LucasZhou <donghao.zhou@outlook.com>

* [3.15] pythongh-158539: Use portable static assertion messages

* [3.15] pythongh-158539: Keep layout assertions with debug-offset validation

* [3.15] pythongh-158539: Use the platform guard for in-process inspection tests

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Co-authored-by: LucasZhou <donghao.zhou@outlook.com>
(cherry picked from commit d625ecb)

…e recurses (pythonGH-158526) (python#158870)

Co-authored-by: Timofei Ivankov <128279579+deadlovelll@users.noreply.github.com>
(cherry picked from commit a904b39)