| commit | 4106c650d36c6abacf96dd967e37f15c2ece58b7 | [log] [tgz] |
|---|---|---|
| author | Alexander Sidorov <salex@fb.com> | Thu Sep 21 15:11:58 2017 -0700 |
| committer | Facebook Github Bot <facebook-github-bot@users.noreply.github.com> | Thu Sep 21 15:21:45 2017 -0700 |
| tree | d126528723caa3a7137331e5c3d4c424423bc320 | |
| parent | b8ab3080b1043a610ba2825a2be406a1833b1d70 [diff] |
fix a race in type registration Summary: Here's what's happening: C++ only guarantees that static initialization is thread safe there: https://fburl.com/40wdmf1q So TypeNameRegisterer<bool> can not be called concurrently with TypeNameRegisterer<bool> from another invocation But there's no guarantees about different template specializations as they declare separate variables. Thus TypeNameRegisterer<int> might race with TypeNameRegisterer<bool>. And TypeNameRegisterer accesses the global variable here: https://fburl.com/gv2mhi08 Thanks dzhulgakov for the investigation! Reviewed By: Yangqing Differential Revision: D5882913 fbshipit-source-id: 4db1080b11e6351ce8136373e2dfc52980642fbb
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