On 2015/03/24 11:35:02, caitp wrote:
On 2015/03/24 11:30:50, arv wrote:
> It is not clear why we need 4 new maps? Can you list the different
cases of
> functions and how their maps differ?
SLOPPY_FUNCTION_MAP and SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP install
caller/arguments accessors as own properties, which is forbidden. The
strict
variants of these install the poisoned accessors as own properties, which
is
also forbidden. For legacy syntactic forms, this behaviour is still
needed ---
so it seems that you need the extra maps.
If the global maps weren't set up, and the accessors were added during
function
instantiation, you'd still end up with new maps implicitly.
It may be possible to just reuse the strong mode variants, but that may have
other implications
https://codereview.chromium.org/1027283004/
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