• Michael Lippautz's avatar
    cppgc: Refactor write barriers · e8813049
    Michael Lippautz authored
    Refactor write barriers and split calls, as e.g. DijkstraWriteBarrier
    also contained logic for recording slots (cards) for the young
    generation.
    
    The new API exposes the following:
    - GetWriteBarrierType(): Retrieving the type of barrier that must be
      emitted;
    - DijkstraWriteBarrier(), DijkstraWriteBarrierRange(): Dijkstra-style
      write barriers;
    - SteeleWriteBarrier(): Steele-style write barrier;
    - GenerationalBarrier(): Barrier for recording slots when using
      multiple generations;
    
    Compilers running with -O3 optimize the DijkstraWriteBarrierPolicy
    down to the same instructions as before the split.
    
    Change-Id: If68839cc6357b2f568986c9ce8ca753b1e96a70a
    Bug: chromium:1056170
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2557514
    Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
    Reviewed-by: 's avatarOmer Katz <omerkatz@chromium.org>
    Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#71407}
    e8813049
write-barrier.cc 4.19 KB