tree 2e0d4b83f732b4290a44bc575a5bdd06a93fb86d
parent 81c87d25eb763bb75bec49fdb733b3488c590895
author Ryan Macnak <rmacnak@google.com> 1634144166 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1634144166 +0000

[vm, gc] Use relaxed loads when reading the header of an ephemeron's key.

The ephemeron and its key may be processed by different workers, so there is a race when accessing the key's header. This race is harmless: if the key becomes a survivor, it will trigger another round of ephemeron processing.

TEST=tsan, splay_ephemeron_test
Bug: https://github.com/dart-lang/sdk/issues/47412
Change-Id: I20339c2215f2d37ad8b9687aebe62492b36a8a61
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/216340
Reviewed-by: Liam Appelbe <liama@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>