[CoordinatedGraphics] ThreadedDisplayRefreshMonitor is never released

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Carlos Garcia Campos]

The problem is that DisplayRefreshMonitorManager::createMonitorForClient() always creates a new one for RenderingUpdateScheduler because it's not notified of the window screen change. So, createDisplayRefreshMonitor() is called every time, which returns a reference of the same object, but it's added to the monitors Vector of DisplayRefreshMonitorManager and never removed from there.

[Carlos Garcia Campos]

Created attachment 385956 [details]
Patch

[Zan Dobersek]

Comment on attachment 385956 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=385956&action=review

> Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp:574
> +        changeWindowScreen();

This is problematic, cause the lambda is using m_layerTreeHost which is null.

[Carlos Garcia Campos]

Comment on attachment 385956 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=385956&action=review

>> Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp:574
>> +        changeWindowScreen();
> 
> This is problematic, cause the lambda is using m_layerTreeHost which is null.

This is called right after setting m_layerTreeHost, or does the lambda capture the value at the time it's declared, even when a reference is passed? It's not crashing here, for sure.

[Carlos Garcia Campos]

Created attachment 386083 [details]
Try to fix wincairo build

[Carlos Garcia Campos]

Committed r253744: <https://trac.webkit.org/changeset/253744>