• Joyee Cheung's avatar
    [class] fix evaluation order and errors in private accessor assignments · f77b05d4
    Joyee Cheung authored
    In assignments the lhs should be evaluated first and shouldn't be
    re-evaluated when the value of the rhs is available. Fix it by
    saving the receiver and the key registers into AssignmentLhsData
    before building the assignment and use them later, instead of visiting
    the AST again to retrieve the receiver.
    
    In addition, now that we save the receiver register, use it to
    perform the brand check even when we know for sure that it's
    going to fail later because it's a write to a private
    method or accessing the accessor in the wrong way (v8:11364),
    so that the brand check error always appears first if it is present,
    as specified in
    https://tc39.es/proposal-private-methods/#sec-privatefieldget
    
    Drive-by: unify the brand check error messages, and replace "Object"
    with "Receiver" in the messages for clarity. The instance private
    brand check now throws "Receiver must be an instance of class <name>"
    and the static private brand check now throws "Receiver must be
    class <name>". Also always set the expression position to the
    property load position, because the brand check failure comes from
    the load operation.
    
    Bug: v8:12352, v8:11364
    Change-Id: I61a8979b2e02b561dd5b2b35f9e0b6691fe07599
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3266964
    Commit-Queue: Joyee Cheung <joyee@igalia.com>
    Reviewed-by: 's avatarMarja Hölttä <marja@chromium.org>
    Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
    Reviewed-by: 's avatarIgor Sheludko <ishell@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#77797}
    f77b05d4
bytecode-generator.cc 269 KB