gh-117657: Fix QSBR race condition#118843
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…exit}__` (python#118812) These methods are purely wrappers around `Semlock.{acquire,release}`, which expect a critical section to be held.
…ld (python#118723) The `list_preallocate_exact` function did not zero initialize array contents. In the free-threaded build, this could expose uninitialized memory to concurrent readers between the call to `list_preallocate_exact` and the filling of the array contents with items.
…t file (python#118808) Some embedders and extensions include parts of the internal API. The pycore_mimalloc.h file is transitively include by a number of other internal headers. This avoids include errors for code that was already including those headers.
Avoid immortalizing objects in tests that verify garbage collection of classes or modules. This fixes test_ordered_dict and test_struct.
…ython#118722) Using `race:` filters out warnings if the function appears anywhere in the stack trace. This can hide a lot of unrelated warnings, especially for a function like `_PyEval_EvalFrameDefault`, which is somewhere on the stack more often than not. Change all free-threaded suppressions to `race_top:`, which only matches the top frame, and add any new suppressions this exposes.
…ython#118854) Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
…NULL object (python#115433)" (python#118861) This reverts commit ad4f909. The API ended up not being used.
SonicField requested review from 1st1, asvetlov, brettcannon, gpshead, gvanrossum, isidentical, markshannon, methane, ncoghlan, vsajip and warsaw as code owners
colesbury changed the title 
Thanks @SonicField for the PR, and @colesbury for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13. |
miss-islington pushed a commit to miss-islington/cpython that referenced this pull request May 10, 2024
`_Py_qsbr_unregister` is called when the PyThreadState is already detached, so the access to `tstate->qsbr` isn't safe without locking the shared mutex. Grab the `struct _qsbr_shared` from the interpreter instead. (cherry picked from commit 33d2019) Co-authored-by: Alex Turner <alexturner@meta.com>
GH-118905 is a backport of this pull request to the 3.13 branch. |
colesbury pushed a commit that referenced this pull request May 10, 2024
`_Py_qsbr_unregister` is called when the PyThreadState is already detached, so the access to `tstate->qsbr` isn't safe without locking the shared mutex. Grab the `struct _qsbr_shared` from the interpreter instead. (cherry picked from commit 33d2019) Co-authored-by: Alex Turner <alexturner@meta.com>
estyxx pushed a commit to estyxx/cpython that referenced this pull request Jul 17, 2024
`_Py_qsbr_unregister` is called when the PyThreadState is already detached, so the access to `tstate->qsbr` isn't safe without locking the shared mutex. Grab the `struct _qsbr_shared` from the interpreter instead.
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Fix TSAN issues in free threaded build: