Bug 300335

Summary:	Fix race condition in testVMManagerStopTheWorld().
Product:	WebKit	Reporter:	Mark Lam <mark.lam>
Component:	New Bugs	Assignee:	Mark Lam <mark.lam>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Mark Lam

Reported 2025-10-07 11:47:57 PDT

The global totalNumberOfVMs is being incremented from worker threads as they start. As such, there's a race where their read-modify-write operation can trash each other's mods. The fix is simply to make totalNumberOfVMs atomic.

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Radar WebKit Bug Importer

Comment 1 2025-10-07 11:48:18 PDT

<rdar://problem/162135022>

Mark Lam

Comment 2 2025-10-07 12:07:30 PDT

Pull request: https://github.com/WebKit/WebKit/pull/51958

EWS

Comment 3 2025-10-07 13:11:24 PDT

Committed 301159@main (24181825972e): <https://commits.webkit.org/301159@main> Reviewed commits have been landed. Closing PR #51958 and removing active labels.

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