935d915186
Unified heap support in V8 requires having another (at least internal) heap that implements a unfied garbage collection strategy. This will not re-use the already existing cppgc::Heap because there should be no way in creating such a heap externally or scheduling stand-alone garbage collections. In order to have a common token, this CL introduces AllocationHandle which can be passed to MakeGarbageCollected to allocate C++ objects. V8 (soon) and the stand-alone heap both have methods to retrieve such a handle. This works around a problem with creating diamond class hierarchies when a base class would be exposed on the public API level. Fast paths for Blink are still possible because allocation handles can be cached the same way (e.g. global, or TLS) as a heap can be cached. Tbr: yangguo@chromium.org Bug: chromium:1056170 Change-Id: I8e9472a2c24ef82d1178953e8429b1fd8a2344bc Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2238027 Commit-Queue: Michael Lippautz <mlippautz@chromium.org> Reviewed-by: Omer Katz <omerkatz@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Cr-Commit-Position: refs/heads/master@{#68310} |
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| cppgc-for-v8-embedders.cc | ||