Reland "[offthread] Template deserializer on Isolate"
This is a reland of e24fa913 It fixes the heap verification errors by going back to using MakeThin instead of manually creating a filler (that then makes the verifier think that this was array left-trimming). Original change's description: > [offthread] Template deserializer on Isolate > > Make the deserializer class templated on Isolate/LocalIsolate. This > allows the ObjectSerializer to be split into a main-thread and offthread > variant, with the latter taking a LocalIsolate. > > Eventually, we probably want to anyway split off the code-cache de/serializer > to a separate implementation (for various reasons), and this the only one that > wants off-thread finalization, and at this point the deserializer can revert > back to being un-templated, used only for bootstrapping. However, this is the > simplest way, for now, to enable off-thread deserialization. > > Bug: chromium:1075999 > Change-Id: I49c0d2c5409f0aa58183673785296756c3714f22 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2562254 > Reviewed-by: Jakob Gruber <jgruber@chromium.org> > Reviewed-by: Dominik Inführ <dinfuehr@chromium.org> > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Cr-Commit-Position: refs/heads/master@{#75834} Bug: chromium:1075999 Change-Id: I1d81fad2550a2a9f04dd0f9d8e66422d28faf378 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3043960Reviewed-by:Jakob Gruber <jgruber@chromium.org> Reviewed-by:
Omer Katz <omerkatz@chromium.org> Auto-Submit: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Omer Katz <omerkatz@chromium.org> Cr-Commit-Position: refs/heads/master@{#75918}
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