[Webkit-unassigned] [Bug 204396] New: [WinCairo] Sometime becomes unable to get any network resources while browsing with WinCairoRequirements v2019.11.15

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204396

            Bug ID: 204396
           Summary: [WinCairo] Sometime becomes unable to get any network
                    resources while browsing with WinCairoRequirements
                    v2019.11.15
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com

WinCairo with WinCairoRequirements v2019.11.15.

While browsing some web sites, MiniBrowser sometime becomes unable to get any network resources.
I need to restart MiniBrowser to recover.

Callstack of curl thread of WebKitNetworkProcess.exe

> libcurl.dll!Curl_splay(curltime i, Curl_tree * t) Line 91	C
> libcurl.dll!Curl_splaygetbest(curltime i, Curl_tree * t, Curl_tree * * removed) Line 166	C
> libcurl.dll!curl_multi_perform(Curl_multi * multi, int * running_handles) Line 2253	C
> WebKit2.dll!WebCore::CurlMultiHandle::perform(int & runningHandles) Line 260	C++
> WebKit2.dll!WebCore::CurlRequestScheduler::workerThread() Line 184	C++
> WebKit2.dll!WebCore::CurlRequestScheduler::startThreadIfNeeded::__l2::<lambda>() Line 98	C++
> WebKit2.dll!WTF::Detail::CallableWrapper<void <lambda>(void),void>::call() Line 52	C++
> WTF.dll!WTF::Function<void __cdecl(void)>::operator()() Line 80	C++
> WTF.dll!WTF::Thread::entryPoint(WTF::Thread::NewThreadContext * newThreadContext) Line 149	C++
> WTF.dll!WTF::wtfThreadEntryPoint(void * data) Line 153	C++
> ucrtbase.dll!thread_start<unsigned int (__cdecl*)(void *),1>()	Unknown
> kernel32.dll!BaseThreadInitThunk()	Unknown
> ntdll.dll!RtlUserThreadStart()	Unknown


The main thread of WebKitWebProcess.exe is just doing nothing.

> [External Code]	
> WebKit2.dll!WebCore::TimerWindowWndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 82	C++
> [External Code]	
> WTF.dll!WTF::RunLoop::run() Line 74	C++
> WebKit2.dll!WebKit::AuxiliaryProcessMain<WebKit::WebProcess,WebKit::WebProcessMain>(int argc, char * * argv) Line 67	C++
> WebKit2.dll!WebProcessMainWin(int argc, char * * argv) Line 50	C++
> WebKitWebProcess.exe!main(int argc, char * * argv) Line 34	C++
> [External Code]

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