[webkit-dev] FrameLoader::stopAllLoaders and sync XHR

Joe Mason jmason at blackberry.com
Mon Apr 22 08:37:09 PDT 2013

I'm trying to debug a deadlock on exit in a BlackBerry app that uses webkit (which is pretty hard to reproduce, so I don't have a cut-down test case yet). Right now my suspicions are on this behaviour:

a synchronous XMLHttpRequest starts loading (from a script running in the main frame)
ResourceHandle::platformLoadResourceSynchronously gets called
On BlackBerry, this is implemented by creating a nested EventLoop and calling loop.cycle()
While in the nested event loop, BlackBerry::WebPage::stopLoading is called
This is implemented by calling m_mainFrame->loader()->stopAllLoaders()

As far as I can see, FrameLoader::stopAllLoaders does NOT stop any XMLHttpRequest started from this frame - it just stops the provisionalDocumentLoader and documentLoader for the frame itself, and recursively does the same for all subframes. Is that correct?

Is there a way to find and stop all synchronous requests associated with a frame? (There should be only one...)


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