[webkit-changes] [WebKit/WebKit] 69218f: [JSC] Fix DFG::AbstractHeap initialization from po...

[Max Rottenkolber]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 69218f370db8606813041a0efeddfcab5643cc1c
      https://github.com/WebKit/WebKit/commit/69218f370db8606813041a0efeddfcab5643cc1c
  Author: Max Rottenkolber <maximilian at igalia.com>
  Date:   2024-10-17 (Thu, 17 Oct 2024)

  Changed paths:
    M Source/JavaScriptCore/dfg/DFGAbstractHeap.h

  Log Message:
  -----------
  [JSC] Fix DFG::AbstractHeap initialization from pointer on armv7
https://bugs.webkit.org/show_bug.cgi?id=281378

Reviewed by Justin Michaud.

The previous incantation would cause 32 bit pointers to be
sign extended into a int64_t slot. We want to widen then
value without sign extension here, as the higher bits will
be used for a tag. (See encode())

* Source/JavaScriptCore/dfg/DFGAbstractHeap.h:
(JSC::DFG::AbstractHeap::Payload::Payload):

Canonical link: https://commits.webkit.org/285323@main



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