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gh-118561: Fix crash involving list.extend in free-threaded build#118723
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The `list_preallocate_exact` function did not zero initialize arraycontents. In the free-threaded build, this could expose uninitializedmemory to concurrent readers between the call to`list_preallocate_exact` and the filling of the array contents withitems.
Misc/NEWS.d/next/Core and Builtins/2024-05-07-16-57-56.gh-issue-118561.wNMKVd.rst OutdatedShow resolvedHide resolved
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corona10 approved these changesMay 8, 2024
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lgtm
…e-118561.wNMKVd.rstCo-authored-by: Donghee Na <donghee.na92@gmail.com>
Thanks@colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13. |
miss-islington pushed a commit to miss-islington/cpython that referenced this pull requestMay 9, 2024
…ld (pythonGH-118723)The `list_preallocate_exact` function did not zero initialize arraycontents. In the free-threaded build, this could expose uninitializedmemory to concurrent readers between the call to`list_preallocate_exact` and the filling of the array contents withitems.(cherry picked from commit2402715)Co-authored-by: Sam Gross <colesbury@gmail.com>
GH-118863 is a backport of this pull request to the3.13 branch. |
colesbury added a commit that referenced this pull requestMay 9, 2024
…ild (GH-118723) (#118863)The `list_preallocate_exact` function did not zero initialize arraycontents. In the free-threaded build, this could expose uninitializedmemory to concurrent readers between the call to`list_preallocate_exact` and the filling of the array contents withitems.(cherry picked from commit2402715)Co-authored-by: Sam Gross <colesbury@gmail.com>
SonicField pushed a commit to SonicField/cpython that referenced this pull requestMay 10, 2024
…ld (python#118723)The `list_preallocate_exact` function did not zero initialize arraycontents. In the free-threaded build, this could expose uninitializedmemory to concurrent readers between the call to`list_preallocate_exact` and the filling of the array contents withitems.
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The
list_preallocate_exactfunction did not zero initialize array contents. In the free-threaded build, this could expose uninitialized memory to concurrent readers between the call tolist_preallocate_exactand the filling of the array contents with items.test_free_threading.test_racing_iter_extendcrash #118561