tree f97105a20495d2d26191fa98e57be90cc9ffc824
parent 0f91731f9827cde4ceb8c287eaac74bdf9864bc6
author Ryan Macnak <rmacnak@google.com> 1560460395 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1560460395 +0000

[vm] Update Megamorphic::filled_entry_count_ under the megamorphic lock.

Otherwise the background compiler may see 0 when the mutator grows the megamorphic cache.

Bug: https://github.com/dart-lang/sdk/issues/37257
Change-Id: I64a31937391ad6c0f086f8f175501ca4ef06c305
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/105969
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>