[Webkit-unassigned] [Bug 176669] New: [JSC] Fold gigacage address into 32bit

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Sep 10 04:17:36 PDT 2017


            Bug ID: 176669
           Summary: [JSC] Fold gigacage address into 32bit
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: utatane.tea at gmail.com

We access caged area by doing `base + (target & mask)`.
At that time, target is 64bit pointer.

This is rough idea: If we can discard alignment part we can make this target address within 32bit.
If the memory area is 8byte aligned, our 32bit offset can represent 32GB (4 * 8), which matches to the current gigacage area.
Computation becomes like, `base + (target << alignment)`.

You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20170910/33df8a02/attachment-0001.html>

More information about the webkit-unassigned mailing list