• Seth Brenith's avatar
    Assign CoverageInfo an instance type · 6ce65b96
    Seth Brenith authored
    This allows CoverageInfo to be distinguished from other kinds of
    FixedArray at runtime. I also updated it to use untagged data since it
    only stores ints, since that seems like the generally right thing to do
    (even though I doubt anybody allocates enough of these to notice the
    reduced GC work).
    
    Related Torque changes:
    - Allow structs containing untagged data to be used as class fields.
      This requires classifying them into the tagged or untagged sections of
      the class layout, and checking that their alignment requirements are
      met when stored in a packed array.
    - Generate a struct containing struct field offsets, so we can ensure
      that the layouts defined in Torque and C++ code match. Of course it
      would be nice to generate a lot more (indexed accessors, synchronized
      accessors, GC visitors, etc.), but we can't do it all at once.
    
    Change-Id: I29e2a2afe37e4805cd80e3a84ef9edfe7ca7bb6b
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2047399Reviewed-by: 's avatarJakob Gruber <jgruber@chromium.org>
    Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
    Reviewed-by: 's avatarTobias Tebbi <tebbi@chromium.org>
    Reviewed-by: 's avatarRoss McIlroy <rmcilroy@chromium.org>
    Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
    Cr-Commit-Position: refs/heads/master@{#66318}
    6ce65b96
v8heapconst.py 19.7 KB