Bug 303343

Summary:	Implement a fallback in CompactPtr for storing some pointers that don't fit within 36-bits.
Product:	WebKit	Reporter:	Mark Lam <mark.lam>
Component:	JavaScriptCore	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 2025-12-01 14:50:12 PST

The OS linker / loader (at its own discretion) may choose to locate statically allocated objects at addresses that are beyond the 36-bits range (unlike heap addresses which are always within 36-bits). As such, for robustness, CompactPtr should have a fallback system that allows it to encode such outsized pointers.

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Radar WebKit Bug Importer

Comment 1 2025-12-01 14:50:38 PST

<rdar://problem/165647792>

Mark Lam

Comment 2 2025-12-01 15:27:35 PST

Pull request: https://github.com/WebKit/WebKit/pull/54662

EWS

Comment 3 2025-12-02 22:06:52 PST

Committed 303809@main (4d03df5acb1f): <https://commits.webkit.org/303809@main> Reviewed commits have been landed. Closing PR #54662 and removing active labels.

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