• Dominik Inführ's avatar
    [heap] Split old-to-new remembered set · 167a8946
    Dominik Inführ authored
    Split OLD_TO_NEW remembered set and add OLD_TO_NEW_SWEEPING. The
    OLD_TO_NEW remembered set is moved to OLD_TO_NEW_SWEEPING during
    mark-compact. OLD_TO_NEW_SWEEPING is then modified by the sweeper.
    Before using the page again, OLD_TO_NEW and OLD_TO_NEW_SWEEPING are
    merged again.
    
    This means only the main thread modifies OLD_TO_NEW, the sweeper only
    removes entries from OLD_TO_NEW_SWEEPING. We can use this property
    to make accesses non-atomic in a subsequent CL.
    
    Bug: v8:9454
    Change-Id: I9057cf85818d647775ae4c7beec4c8ccf73e18f7
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1771783Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
    Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#63807}
    167a8946
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