[Webkit-unassigned] [Bug 253133] New: memory pressure handler should call deleteAllCode with PreventCollectionAndDeleteAllCode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=253133

            Bug ID: 253133
           Summary: memory pressure handler should call deleteAllCode with
                    PreventCollectionAndDeleteAllCode
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: heycam at apple.com

The memory pressure handler currently calls GCController::deleteAllCode(DeleteAllCodeIfNotCollecting), but it turns out we hit the case of a collection being in progress moderately often.  We already do a bunch of blocky work here to get memory usage down, so let's change this to PreventCollectionAndDeleteAllCode to guarantee we can drop all JIT code.

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