[Webkit-unassigned] [Bug 283794] WebContent shared process bug when building WebKit using Xcode 16

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=283794

Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
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                 CC|                            |achristensen at apple.com

--- Comment #2 from Alexey Proskuryakov <ap at webkit.org> ---
In general, the answer is that known changes that are tied to SDK are in https://github.com/WebKit/WebKit/blob/main/Source/WTF/wtf/cocoa/RuntimeApplicationChecksCocoa.mm. Specifically, the changes associated with iOS 18 SDK are:

    if (linkedBefore(dyld_fall_2024_os_versions, DYLD_IOS_VERSION_18_0, DYLD_MACOSX_VERSION_15_0)) {
        disableBehavior(SDKAlignedBehavior::FullySuspendsBackgroundContentImmediately);
        disableBehavior(SDKAlignedBehavior::NoGetElementsByNameQuirk);
        disableBehavior(SDKAlignedBehavior::ApplicationStateTrackerDoesNotObserveWindow);
        disableBehavior(SDKAlignedBehavior::ThrowOnKVCInstanceVariableAccess);
        disableBehavior(SDKAlignedBehavior::BlockOptionallyBlockableMixedContent);
        disableBehavior(SDKAlignedBehavior::LaxCookieSameSiteAttribute);
        disableBehavior(SDKAlignedBehavior::UseCFNetworkNetworkLoader);
        disableBehavior(SDKAlignedBehavior::BrowsingContextControllerSPIAccessRemoved);
        disableBehavior(SDKAlignedBehavior::BlocksConnectionsToAddressWithOnlyZeros);
        disableBehavior(SDKAlignedBehavior::BlockCrossOriginRedirectDownloads);
    }

It is not immediately clear to me if one of these is the change causing the issue (in part because I do not know anything about how React apps work).

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