Attachment 338983 Details for Bug 184040 – Patch

[patch] Patch

wk2-threaded-compositor-invalidate-context.diff (text/plain), 2.31 KB, created by Carlos Garcia Campos on 2018-04-27 05:07:12 PDT

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Creator: Carlos Garcia Campos

Created: 2018-04-27 05:07:12 PDT

Size: 2.31 KB

patch

obsolete

>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 6b349792a7c..93f92bbe22b 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,21 @@
>+2018-04-27  Carlos Garcia Campos  <cgarcia@igalia.com>
>+
>+        [GTK] WebProcess from WebKitGtk+ 2.19.92 SIGSEVs in WebCore::TextureMapperGL::~TextureMapperGL
>+        https://bugs.webkit.org/show_bug.cgi?id=184040
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This can happen when using single shared process model or when the process limit is reached in multiple process
>+        model. In this case, all pages in the same web process with accelerated compositing enabled share the same
>+        compositing thread. Every page sets its GL context as current when rendering a frame, but not when invalidating
>+        the threaded compositor when the page is closed. So, if a hidden tab is closed, the threaded compositor is
>+        invalidated and the GL resources of the current context (the visible page) are destroyed. This is also causing
>+        the blank pages issue when closing a tab related to another one, the current one stops rendering anyting because
>+        its GL context has been released. We should make the threaded compositor context current when invalidating it.
>+
>+        * Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp:
>+        (WebKit::ThreadedCompositor::invalidate):
>+
> 2018-04-27  Carlos Garcia Campos  <cgarcia@igalia.com>
> 
>         REGRESSION(r230812): [WPE][GTK] WebKitWebViewSessionState.cpp throws away encoded BackForwardList identifier
>diff --git a/Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp b/Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp
>index 3098df72b2a..e721000a040 100644
>--- a/Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp
>+++ b/Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp
>@@ -106,6 +106,8 @@ void ThreadedCompositor::invalidate()
>     m_displayRefreshMonitor->invalidate();
> #endif
>     m_compositingRunLoop->performTaskSync([this, protectedThis = makeRef(*this)] {
>+        if (!m_context || !m_context->makeContextCurrent())
>+            return;
>         m_scene->purgeGLResources();
>         m_context = nullptr;
>         m_client.didDestroyGLContext();

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