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authorStefan Krah <skrah@bytereef.org>2020-03-02 20:22:36 (GMT)
committerGitHub <noreply@github.com>2020-03-02 20:22:36 (GMT)
commitb3b9ade4a3d3fe00d933bcd8fc5c5c755d1024f9 (patch)
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bpo-39776: Lock ++interp->tstate_next_unique_id. (GH-18746) (#18746)
- Threads created by PyGILState_Ensure() could have a duplicate tstate->id.
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+Fix race condition where threads created by PyGILState_Ensure() could get a
+duplicate id.
+
+This affects consumers of tstate->id like the contextvar caching machinery,
+which could return invalid cached objects under heavy thread load (observed
+in embedded scenarios).