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Raise the bar for SharedArrayBuffer via postMessage() #4734

Merged
merged 5 commits into from
Jul 8, 2020
Merged

Raise the bar for SharedArrayBuffer via postMessage() #4734

merged 5 commits into from
Jul 8, 2020

Commits on Jun 29, 2020

  1. Add the cross-origin isolated primitive 

    A top-level navigation response with Cross-Origin-Opener-Policy set to same-origin and Cross-Origin-Embedder-Policy set to require-corp will create a cross-origin isolated browsing context group. And all agent clusters therein will be cross-origin isolated as well (shared and service workers can still not be, as they sit on the side).

This change also:

* Gates SharedArrayBuffer exposure behind that primitive for web compatibility reasons.
* Gates SharedArrayBuffer sharing behind that primitive.
* Exposes it through self.crossOriginIsolated.
* Makes document.domain return before it mutates the origin.
* Makes agent clusters keyed on origin.

Tests:

* web-platform-tests/wpt#17719
* web-platform-tests/wpt#17760
* web-platform-tests/wpt#17761
* web-platform-tests/wpt#17802
* web-platform-tests/wpt#17909
* web-platform-tests/wpt#18543
* web-platform-tests/wpt#20116
* web-platform-tests/wpt#22358

Closes #4732. Closes #5122. Closes #5444.

Follow-up: #5435.
    @annevk
    annevk committed Jun 29, 2020
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  2. address feedback

    @annevk
    annevk committed Jun 29, 2020
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Commits on Jul 7, 2020

  1. getter steps

    @annevk
    annevk committed Jul 7, 2020
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  2. More precise SAB deletion

    @domenic
    domenic committed Jul 7, 2020
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Commits on Jul 8, 2020

  1. nit

    @annevk
    annevk committed Jul 8, 2020
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