• mbrandy's avatar
    PPC: Use Cells to check prototype chain validity (disabled by default). · 0dc5fd70
    mbrandy authored
    Port 0179ec57
    
    Original commit message:
    The cells are stored on prototypes (in their map's PrototypeInfo). When a prototype object changes its map, then both its own validity cell and those of all "downstream" prototypes are invalidated; handlers for a given receiver embed the currently valid cell for that receiver's prototype during their compilation and check it on execution.
    
    R=michael_dawson@ca.ibm.com, dstence@us.ibm.com
    BUG=
    
    Review URL: https://codereview.chromium.org/1091563002
    
    Cr-Commit-Position: refs/heads/master@{#27849}
    0dc5fd70
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