• Dan Elphick's avatar
    Reland "Reland: [builtins] Move non-JS linkage builtins code objects into RO_SPACE" · 352bbb12
    Dan Elphick authored
    This is a reland of 855591a5
    
    Fixes break in builds that verify ReadOnlyHeap by relaxing the requirement for
    Code objects to be in CODE_SPACE in PagedSpaceObjectIterator::FromCurrentPage.
    
    Original change's description:
    > Reland: [builtins] Move non-JS linkage builtins code objects into RO_SPACE
    >
    > Reland of https://chromium-review.googlesource.com/c/v8/v8/+/1795358.
    >
    > [builtins] Move non-JS linkage builtins code objects into RO_SPACE
    >
    > Creates an allow-list of builtins that can still go in code_space
    > including all TFJ builtins and a small manual list that should be pared
    > down in the future.
    >
    > For builtins that go in RO_SPACE a Code object is created that contains an
    > immediate trap instruction. Generally these Code objects are still no
    > smaller than CODE_SPACE Code objects because of the Code object alignment
    > requirements. This will hopefully be addressed in a follow-up CL either by
    > relaxing them or removing the instruction stream completely.
    >
    > In the snapshot, this reduces code_space from ~152k to ~40k (-112k) and
    > increases by the same amount.
    >
    > Change-Id: I76661c35c7ea5866c1fb16e87e87122b3e3ca0ce
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1893336
    > Commit-Queue: Dan Elphick <delphick@chromium.org>
    > Reviewed-by: Jakob Gruber <jgruber@chromium.org>
    > Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#64700}
    
    Change-Id: I4eeb7dab3027b42fa58c5dfb2bad9873e9fff250
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1893192
    Commit-Queue: Dan Elphick <delphick@chromium.org>
    Reviewed-by: 's avatarJakob Gruber <jgruber@chromium.org>
    Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#64728}
    352bbb12
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