Status: Untriaged
Owner: ----
New issue 4315 by [email protected]: some TypedArray static method
properties non-config, non-writable
https://code.google.com/p/v8/issues/detail?id=4315
On Chrome Canary 46.0.2460.0 the following properties are all born
non-configurable, non-writable.
Float32Array.from Float32Array.of Float64Array.from Float64Array.of
Int16Array.from Int16Array.of Int32Array.from Int32Array.of Int8Array.from
Int8Array.of Uint16Array.from Uint16Array.of Uint32Array.from
Uint32Array.of Uint8Array.from Uint8Array.of Uint8ClampedArray.from
Uint8ClampedArray.of
By the spec, they should all be configurable, writable. To facilitate
initialize-time monkey-patching of the primordials, they should at least be
configurable. For example, SES does not yet list these on its whitelist
https://github.com/google/caja/blob/master/src/com/google/caja/ses/whitelist.js#L162
and so must remove them or render them obviously harmless (such as by
setting them to undefined and freezing them). However, with these settings,
SES cannot, causing it to reject the platform as not known to be SES-safe.
Visit
https://rawgit.com/google/caja/master/src/com/google/caja/ses/explicit.html
and expand the line
[+] 18 Cannot be poisoned. Not isolated(5) is not SES-safe.
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