[Webkit-unassigned] [Bug 195270] New: [CoordinatedGraphics] The compositing loop is still running even after exiting AC mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=195270

            Bug ID: 195270
           Summary: [CoordinatedGraphics] The compositing loop is still
                    running even after exiting AC mode
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com
                CC: bugs-noreply at webkitgtk.org

[CoordinatedGraphics] The compositing loop is still running even after exiting AC mode

I tested with GTK port MiniBrowser, trunk at 242333. 

1) Go to https://bugs.webkit.org/
2) Go to https://webkit.org/blog-files/3d-transforms/morphing-cubes.html
3) Back
4) The compositing loop is still running.
5) Wait to 5 second to destruct LayerTreeHost
6) The compositing loop is still running.

Callstack:

> #0  WebKit::ThreadedCompositor::renderLayerTree (this=0x7fae65f165d8)
>     at ../../Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp:178
> #1  0x00007fae7c3c0f2f in WebKit::ThreadedCompositor::<lambda()>::operator()(void) const (__closure=0x7fae65f04bb8)
>     at ../../Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp:57
> #2  0x00007fae7c3c8fc4 in WTF::Function<void()>::CallableWrapper<WebKit::ThreadedCompositor::ThreadedCompositor(WebKit::ThreadedCompositor::Client&, WebKit::ThreadedDisplayRefreshMonitor::Client&, WebCore::PlatformDisplayID, const WebCore::IntSize&, float, WebKit::ThreadedCompositor::ShouldDoFrameSync, WebCore::TextureMapper::PaintFlags)::<lambda()> >::call(void) (this=0x7fae65f04bb0) at DerivedSources/ForwardingHeaders/wtf/Function.h:102
> #3  0x00007fae7bf0808e in WTF::Function<void ()>::operator()() const (this=0x7fae65fb4f50) at DerivedSources/ForwardingHeaders/wtf/Function.h:57
> #4  0x00007fae7c3c0e58 in WebKit::CompositingRunLoop::updateTimerFired (this=0x7fae65fb4f08)
>     at ../../Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/CompositingRunLoop.cpp:210
> #5  0x00007fae7c3da726 in WTF::RunLoop::Timer<WebKit::CompositingRunLoop>::fired (this=0x7fae65fb4f10) at DerivedSources/ForwardingHeaders/wtf/RunLoop.h:148
> #6  0x00007fae70208723 in WTF::RunLoop::TimerBase::<lambda(gpointer)>::operator()(gpointer) const (__closure=0x0, userData=0x7fae65fb4f10)
>     at ../../Source/WTF/wtf/glib/RunLoopGLib.cpp:171
> #7  0x00007fae7020877b in WTF::RunLoop::TimerBase::<lambda(gpointer)>::_FUN(gpointer) () at ../../Source/WTF/wtf/glib/RunLoopGLib.cpp:177
> #8  0x00007fae70207dc4 in WTF::<lambda(GSource*, GSourceFunc, gpointer)>::operator()(GSource *, GSourceFunc, gpointer) const (__closure=0x0, 
>     source=0x55ad6efe9760, callback=0x7fae7020875e <WTF::RunLoop::TimerBase::<lambda(gpointer)>::_FUN(gpointer)>, userData=0x7fae65fb4f10)
>     at ../../Source/WTF/wtf/glib/RunLoopGLib.cpp:45
> #9  0x00007fae70207df4 in WTF::<lambda(GSource*, GSourceFunc, gpointer)>::_FUN(GSource *, GSourceFunc, gpointer) () at ../../Source/WTF/wtf/glib/RunLoopGLib.cpp:46
> #10 0x00007fae71daaa58 in g_main_dispatch () at ../../Source/glib-2.58.1/glib/gmain.c:3182
> #11 g_main_context_dispatch () at ../../Source/glib-2.58.1/glib/gmain.c:3847
> #12 0x00007fae71daae48 in g_main_context_iterate () at ../../Source/glib-2.58.1/glib/gmain.c:3920
> #13 0x00007fae71dab142 in g_main_loop_run () at ../../Source/glib-2.58.1/glib/gmain.c:4116
> #14 0x00007fae70208333 in WTF::RunLoop::run () at ../../Source/WTF/wtf/glib/RunLoopGLib.cpp:96
> #15 0x00007fae7c3c05e5 in WebKit::<lambda()>::operator()(void) const (__closure=0x7fae1e0dd278)
>     at ../../Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/CompositingRunLoop.cpp:49
> #16 0x00007fae7c3c90b4 in WTF::Function<void()>::CallableWrapper<WebKit::createRunLoop()::<lambda()> >::call(void) (this=0x7fae1e0dd270)
>     at DerivedSources/ForwardingHeaders/wtf/Function.h:102
> #17 0x00007fae7bf0808e in WTF::Function<void ()>::operator()() const (this=0x7fadf69fec30) at DerivedSources/ForwardingHeaders/wtf/Function.h:57
> #18 0x00007fae701936c3 in WTF::Thread::entryPoint (newThreadContext=0x7fae65f1e8c0) at ../../Source/WTF/wtf/Threading.cpp:148
> #19 0x00007fae7020ab87 in WTF::wtfThreadEntryPoint (context=0x7fae65f1e8c0) at ../../Source/WTF/wtf/posix/ThreadingPOSIX.cpp:200
> #20 0x00007fae6c5fd164 in start_thread (arg=<optimized out>) at pthread_create.c:486
> #21 0x00007fae72c2bdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

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