• Milad Farazmand's avatar
    PPC/s390: Reland "Reland: [builtins] Move non-JS linkage builtins code objects into RO_SPACE" · 29112b47
    Milad Farazmand authored
    Port 352bbb12
    
    Original Commit Message:
    
        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}
    
    R=delphick@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    LOG=N
    
    Change-Id: If150434119828a87e295b0639c934392812bb345
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1896904Reviewed-by: 's avatarMilad Farazmand <miladfar@ca.ibm.com>
    Reviewed-by: 's avatarDan Elphick <delphick@chromium.org>
    Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#64741}
    29112b47
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