This fixes a crash in `_PyObject_TryGetInstanceAttribute` due to the use
of `_PyDictKeys_StringLookup` on an unlocked dictionary that may be
concurrently modified.
The underlying bug was already fixed in 3.14 and the main branch.
(partially cherry picked from commit 1b15c89a17)
* gh-128714: Fix function object races in `__annotate__`, `__annotations__` and `__type_params__` in free-threading build (#129016)
(cherry picked from commit 55f17b77c3)
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Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
The call to `PySequence_List()` could temporarily unlock and relock the
set, allowing the items to be cleared and return the incorrect
notation `{}` for a empty set (it should be `set()`).
(cherry picked from commit a7427f2db9)
Co-authored-by: T. Wouters <thomas@python.org>
Some fields in PyCodeObject are lazily initialized. Use atomics and
critical sections to make their initializations and accesses thread-safe.
(cherry picked from commit 3926842117)
Co-authored-by: Sam Gross <colesbury@gmail.com>
This fixes a crash when `gc.get_objects()` or `gc.get_referrers()` is
called during a GC in the free threading build.
Switch to `_PyObjectStack` to avoid corrupting the `struct worklist`
linked list maintained by the GC. Also, don't return objects that are frozen
(`gc.freeze()`) or in the process of being collected to more closely match
the behavior of the default build.
(cherry picked from commit e545ead66c)
Co-authored-by: Sam Gross <colesbury@gmail.com>
gh-124402: Speed up test_free_threading and test_super (#124491)
* Reduce the number of iterations and the number of threads so a
whole test file takes less than a minute.
* Refactor test_racing_iter_extend() to remove two levels of
indentation.
* test_monitoring() uses a sleep of 100 ms instead of 1 second.
(cherry picked from commit 0387c34f7c)
gh-124402: Require cpu resource in test_free_threading (#124438)
Require the 'cpu' test resource on slow test_free_threading tests.
(cherry picked from commit 38a5beb12a)
gh-120659: Skip `test_freethreading` with GIL (GH-120660)
(cherry picked from commit 360f14a493)
Co-authored-by: Nice Zombies <nineteendo19d0@gmail.com>
Fix a race in `PyMember_GetOne` and `PyMember_SetOne` for `Py_T_OBJECT_EX`.
These functions implement `__slots__` accesses for Python objects.
(cherry picked from commit 362cd2680b)
Co-authored-by: Daniele Parmeggiani <8658291+dpdani@users.noreply.github.com>
gh-117657: Make Py_TYPE and Py_SET_TYPE thread safe (GH-120165)
(cherry picked from commit e16aed63f6)
Co-authored-by: Ken Jin <kenjin@python.org>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
Co-authored-by: Nadeshiko Manju <me@manjusaka.me>
Add `Py_BEGIN_CRITICAL_SECTION_SEQUENCE_FAST` and
`Py_END_CRITICAL_SECTION_SEQUENCE_FAST` macros and update `str.join` to use
them. Also add a regression test that would crash reliably without this
patch.
(cherry picked from commit baf347d916)
Co-authored-by: Josh {*()} Rosenberg <26495692+MojoVampire@users.noreply.github.com>
Add _PyType_LookupRef and use incref before setting attribute on type
Makes setting an attribute on a class and signaling type modified atomic
Avoid adding re-entrancy exposing the type cache in an inconsistent state by decrefing after type is updated
Makes sys.settrace, sys.setprofile, and monitoring generally thread-safe.
Mostly uses a stop-the-world approach and synchronization around the code object's _co_instrumentation_version. There may be a little bit of extra synchronization around the monitoring data that's required to be TSAN clean.
Sam Gross