Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

fix: use SharedArrayBuffer only when cross-origin isolation is enabled #20831

Merged
merged 3 commits into from Feb 17, 2021
Merged

fix: use SharedArrayBuffer only when cross-origin isolation is enabled #20831

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
04d1da2
fix: check cross-origin isolation for SharedArrayBuffer
koba04 Feb 17, 2021
e9cfc49
chore: remove unused a $FlowFixMe comment
koba04 Feb 17, 2021
d9b506e
prettier
koba04 Feb 17, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
13 changes: 9 additions & 4 deletions packages/scheduler/src/SchedulerProfiling.js
View file
Open in desktop
Expand Up @@ -15,13 +15,18 @@ import {NoPriority} from './SchedulerPriorities';
let runIdCounter: number = 0;
let mainThreadIdCounter: number = 0;

const isEnabledSharedArrayBuffer =
// $FlowFixMe Flow doesn't know about SharedArrayBuffer
typeof SharedArrayBuffer === 'function' &&
// We only use SharedArrayBuffer when cross origin isolation is enabled.
typeof window !== 'undefined' &&
window.crossOriginIsolated === true;

const profilingStateSize = 4;
export const sharedProfilingBuffer = enableProfiling
? // $FlowFixMe Flow doesn't know about SharedArrayBuffer
typeof SharedArrayBuffer === 'function'
? isEnabledSharedArrayBuffer
? new SharedArrayBuffer(profilingStateSize * Int32Array.BYTES_PER_ELEMENT)
: // $FlowFixMe Flow doesn't know about ArrayBuffer
typeof ArrayBuffer === 'function'
: typeof ArrayBuffer === 'function'
? new ArrayBuffer(profilingStateSize * Int32Array.BYTES_PER_ELEMENT)
: null // Don't crash the init path on IE9
: null;
Expand Down