Oilpan young generation currently remembers all weak callbacks to be
processed on each GC. This is needed to support UntracedMembers in the
old space. If the old object with UntracedMember (e.g.
ActiveScriptWrappableManager) holds a pointer to a young object, the
custom weak callback must be reexecuted on each minor GC, because the
custom callback is responsible for clearing UntracedMembers.
This is not necessary for weak containers. They hold WeakMembers, for
which we issue the regular write barrier. The CL distinguishes between
callbacks for weak containers and for custom objects. This aims to
speeds up weak processing, which currently may take >10ms.
Bug: v8:13475
Change-Id: I6964a6835dc84febddbefb5e2952d57f108d1232
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4080470
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84895}
e29e64e729