[Webkit-unassigned] [Bug 144657] New: [iOS][WK2] Pause/resume database thread when UIProcess enters/leaves the background

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=144657

            Bug ID: 144657
           Summary: [iOS][WK2] Pause/resume database thread when UIProcess
                    enters/leaves the background
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: iOS
                OS: iOS 8.2
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org

We should pause and resume the database thread when the UIProcess enters and leaves the background, respectively, to avoid WebProcess termination due to holding a locked SQLite database file when the WebProcess is suspended.

Analogous behavior is implemented in Legacy WebKit. See <http://trac.webkit.org/browser/trunk/Source/WebKit/ios/Misc/WebUIKitSupport.mm?rev=176347#L113>, <http://trac.webkit.org/browser/trunk/Source/WebKit/ios/Misc/WebUIKitSupport.mm?rev=176347#L118> and <http://trac.webkit.org/browser/trunk/Source/WebKit/mac/Storage/WebDatabaseManager.mm?rev=180704#L291>.

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