[Webkit-unassigned] [Bug 169155] New: Take advantage of fast permissions switching of JIT memory for devices that support it

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=169155

            Bug ID: 169155
           Summary: Take advantage of fast permissions switching of JIT
                    memory for devices that support it
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: msaboff at apple.com

The iOS OS team is providing new SPIs to allow for quick switching of the JIT memory region mapped RWX.  These SPIs allow switching all RWX mappings from RX to RW and back on a per thread basis with a single call.

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