1. 08 Mar, 2016 1 commit
    • danno's avatar
      [runtime] Unify and simplify how frames are marked · 9dcd0857
      danno authored
      Before this CL, various code stubs used different techniques
      for marking their frames to enable stack-crawling and other
      access to data in the frame. All of them were based on a abuse
      of the "standard" frame representation, e.g. storing the a
      context pointer immediately below the frame's fp, and a
      function pointer after that. Although functional, this approach
      tends to make stubs and builtins do an awkward, unnecessary
      dance to appear like standard frames, even if they have
      nothing to do with JavaScript execution.
      
      This CL attempts to improve this by:
      
      * Ensuring that there are only two fundamentally different
        types of frames, a "standard" frame and a "typed" frame.
        Standard frames, as before, contain both a context and
        function pointer. Typed frames contain only a minimum
        of a smi marker in the position immediately below the fp
        where the context is in standard frames.
      * Only interpreted, full codegen, and optimized Crankshaft and
        TurboFan JavaScript frames use the "standard" format. All
        other frames use the type frame format with an explicit
        marker.
      * Typed frames can contain one or more values below the
        type marker. There is new magic macro machinery in
        frames.h that simplifies defining the offsets of these fields
        in typed frames.
      * A new flag in the CallDescriptor enables specifying whether
        a frame is a standard frame or a typed frame. Secondary
        register location spilling is now only enabled for standard
        frames.
      * A zillion places in the code have been updated to deal with
        the fact that most code stubs and internal frames use the
        typed frame format. This includes changes in the
        deoptimizer, debugger, and liveedit.
      * StandardFrameConstants::kMarkerOffset is deprecated,
        (CommonFrameConstants::kContextOrFrameTypeOffset
        and StandardFrameConstants::kFrameOffset are now used
        in its stead).
      
      LOG=N
      
      Review URL: https://codereview.chromium.org/1696043002
      
      Cr-Commit-Position: refs/heads/master@{#34571}
      9dcd0857
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  29. 15 Apr, 2014 1 commit
    • plind44@gmail.com's avatar
      MIPS: Add big-endian support for MIPS. · 5a016958
      plind44@gmail.com authored
      Important notices:
      
      - The snapshot cannot be created for big-endian target in cross-compilation
        environment on little-endian host using simulator.
      
      - In order to have i18n support working on big-endian target, the icudt46b.dat and
        icudt46b_dat.S files should be generated and upstreamed to ICU repo.
      
      - The mjsunit 'nans' test is endian dependent, it is skipped for mips target.
      
      - The zlib and Mandreel from Octane 2.0 benchmark are endian dependent due to
        use of typed arrays.
      
      TEST=
      BUG=
      R=jkummerow@chromium.org, plind44@gmail.com
      
      Review URL: https://codereview.chromium.org/228943009
      
      Patch from Dusan Milosavljevic <Dusan.Milosavljevic@rt-rk.com>.
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20778 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      5a016958
  30. 06 Feb, 2014 1 commit