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Make std::sync::Arc compatible with ThreadSanitizer #65097

Merged
merged 1 commit into from
Mar 21, 2020
Merged

Make std::sync::Arc compatible with ThreadSanitizer #65097

merged 1 commit into from
Mar 21, 2020

Commits on Mar 19, 2020

  1. Make std::sync::Arc compatible with ThreadSanitizer 

    The memory fences used previously in Arc implementation are not properly
understood by ThreadSanitizer as synchronization primitives. This had
unfortunate effect where running any non-trivial program compiled with
`-Z sanitizer=thread` would result in numerous false positives.

Replace acquire fences with acquire loads when using ThreadSanitizer to
address the issue.
    @tmiasko
    tmiasko committed Mar 19, 2020
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