Observability of NaN distinctions — is this a concern?
brendan at mozilla.com
Fri Mar 22 19:47:52 PDT 2013
Kenneth Russell wrote:
> I hope that the ES6 integration of typed arrays will not require
> normalization of NaNs on write, even if other specification changes
> need to be made to avoid requiring it.
What other specification changes?
JITs use nan-boxing
If a typed array user could forge a nan-boxed value, they could pwn the
For interop, JS requires cross-browser (VM) NaN canonicalization to
avoid observably different results on different browsers.
Ergo, ES6 must specify normative handling of NaNs
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