Reviewers: Yang,
Message:
PTAL.
Description:
Lazily register prototype users
when handing out validity cells to handles; because invalidating said cells
is
the only time we'll need the user registrations.
Along the way, fix a corner case in WeakFixedArray, which can now be empty
after
the recently introduced compaction support.
Please review this at https://codereview.chromium.org/1104813004/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+191, -76 lines):
M src/objects.h
M src/objects.cc
M test/cctest/test-heap.cc
A test/mjsunit/prototype-changes.js
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