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gh-117657: Fix TSAN race in free-threaded GC - #119883
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Only call `gc_restore_tid()` from stop-the-world contexts. `worklist_pop()` can be called while other threads are running, so use a relaxed atomic to modify `ob_tid`.
Fidget-Spinner
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Jun 1, 2024
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Thanks to work on deferred rc, I now have a somewhat okay-ish grasp on the free-threaded GC code. This LGTM.
colesbury
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Jun 1, 2024
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Thanks! |
Thanks @colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13. |
miss-islington pushed a commit
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Jun 1, 2024
Only call `gc_restore_tid()` from stop-the-world contexts. `worklist_pop()` can be called while other threads are running, so use a relaxed atomic to modify `ob_tid`. (cherry picked from commit 60593b2) Co-authored-by: Sam Gross <colesbury@gmail.com>
GH-119903 is a backport of this pull request to the 3.13 branch. |
colesbury added a commit
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) Only call `gc_restore_tid()` from stop-the-world contexts. `worklist_pop()` can be called while other threads are running, so use a relaxed atomic to modify `ob_tid`. (cherry picked from commit 60593b2) Co-authored-by: Sam Gross <colesbury@gmail.com>
barneygale pushed a commit
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Jun 5, 2024
Only call `gc_restore_tid()` from stop-the-world contexts. `worklist_pop()` can be called while other threads are running, so use a relaxed atomic to modify `ob_tid`.
noahbkim pushed a commit
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Jul 11, 2024
Only call `gc_restore_tid()` from stop-the-world contexts. `worklist_pop()` can be called while other threads are running, so use a relaxed atomic to modify `ob_tid`.
estyxx pushed a commit
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Jul 17, 2024
Only call `gc_restore_tid()` from stop-the-world contexts. `worklist_pop()` can be called while other threads are running, so use a relaxed atomic to modify `ob_tid`.
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Only call
gc_restore_tid()from stop-the-world contexts.worklist_pop()can be called while other threads are running, so use a relaxed atomic to modifyob_tid.