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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/210176">210176</a></dd>
<dt>Author</dt> <dd>carlosgc@webkit.org</dd>
<dt>Date</dt> <dd>2016-12-27 09:02:01 -0800 (Tue, 27 Dec 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>Merge <a href="http://trac.webkit.org/projects/webkit/changeset/205852">r205852</a> - [GTK] Crash of WebProcess on the last WebView disconnect (take two)
https://bugs.webkit.org/show_bug.cgi?id=161842
Reviewed by Michael Catanzaro.
The problem is that when PlatformDisplayX11 is destroyed, the sharing GL context is deleted and its destructor
makes a downcast of PlatformDisplay to get the native X11 display. We could simply keep a pointer to the native
X11 display in GLContextGLX, got at construction time from the PlatformDisplay, and ensure the sharing GL
context is deleted before the native X11 display is closed.
* platform/graphics/PlatformDisplay.h: Make m_sharingGLContext protected.
* platform/graphics/glx/GLContextGLX.cpp:
(WebCore::GLContextGLX::GLContextGLX): Initialize m_x11Display.
(WebCore::GLContextGLX::~GLContextGLX): Use m_x11Display and remove confusing comment about possible crash with
nviedia closed drivers.
(WebCore::GLContextGLX::defaultFrameBufferSize): Use m_x11Display.
(WebCore::GLContextGLX::makeContextCurrent): Ditto.
(WebCore::GLContextGLX::swapBuffers): Ditto.
(WebCore::GLContextGLX::swapInterval): Ditto.
(WebCore::GLContextGLX::cairoDevice): Ditto.
* platform/graphics/glx/GLContextGLX.h:
* platform/graphics/x11/PlatformDisplayX11.cpp:
(WebCore::PlatformDisplayX11::~PlatformDisplayX11): Delete the sharing GL context before closing the display.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#releasesWebKitGTKwebkit214SourceWebCoreChangeLog">releases/WebKitGTK/webkit-2.14/Source/WebCore/ChangeLog</a></li>
<li><a href="#releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsPlatformDisplayh">releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/PlatformDisplay.h</a></li>
<li><a href="#releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsglxGLContextGLXcpp">releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.cpp</a></li>
<li><a href="#releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsglxGLContextGLXh">releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.h</a></li>
<li><a href="#releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsx11PlatformDisplayX11cpp">releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/x11/PlatformDisplayX11.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="releasesWebKitGTKwebkit214SourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.14/Source/WebCore/ChangeLog (210175 => 210176)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.14/Source/WebCore/ChangeLog 2016-12-27 16:44:37 UTC (rev 210175)
+++ releases/WebKitGTK/webkit-2.14/Source/WebCore/ChangeLog 2016-12-27 17:02:01 UTC (rev 210176)
</span><span class="lines">@@ -1,3 +1,29 @@
</span><ins>+2016-09-12 Carlos Garcia Campos <cgarcia@igalia.com>
+
+ [GTK] Crash of WebProcess on the last WebView disconnect (take two)
+ https://bugs.webkit.org/show_bug.cgi?id=161842
+
+ Reviewed by Michael Catanzaro.
+
+ The problem is that when PlatformDisplayX11 is destroyed, the sharing GL context is deleted and its destructor
+ makes a downcast of PlatformDisplay to get the native X11 display. We could simply keep a pointer to the native
+ X11 display in GLContextGLX, got at construction time from the PlatformDisplay, and ensure the sharing GL
+ context is deleted before the native X11 display is closed.
+
+ * platform/graphics/PlatformDisplay.h: Make m_sharingGLContext protected.
+ * platform/graphics/glx/GLContextGLX.cpp:
+ (WebCore::GLContextGLX::GLContextGLX): Initialize m_x11Display.
+ (WebCore::GLContextGLX::~GLContextGLX): Use m_x11Display and remove confusing comment about possible crash with
+ nviedia closed drivers.
+ (WebCore::GLContextGLX::defaultFrameBufferSize): Use m_x11Display.
+ (WebCore::GLContextGLX::makeContextCurrent): Ditto.
+ (WebCore::GLContextGLX::swapBuffers): Ditto.
+ (WebCore::GLContextGLX::swapInterval): Ditto.
+ (WebCore::GLContextGLX::cairoDevice): Ditto.
+ * platform/graphics/glx/GLContextGLX.h:
+ * platform/graphics/x11/PlatformDisplayX11.cpp:
+ (WebCore::PlatformDisplayX11::~PlatformDisplayX11): Delete the sharing GL context before closing the display.
+
</ins><span class="cx"> 2016-12-20 Carlos Garcia Campos <cgarcia@igalia.com>
</span><span class="cx">
</span><span class="cx"> [Cairo] Conditional jump or move depends on uninitialised value(s)
</span></span></pre></div>
<a id="releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsPlatformDisplayh"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/PlatformDisplay.h (210175 => 210176)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/PlatformDisplay.h 2016-12-27 16:44:37 UTC (rev 210175)
+++ releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/PlatformDisplay.h 2016-12-27 17:02:01 UTC (rev 210176)
</span><span class="lines">@@ -80,6 +80,10 @@
</span><span class="cx"> EGLDisplay m_eglDisplay;
</span><span class="cx"> #endif
</span><span class="cx">
</span><ins>+#if USE(EGL) || USE(GLX)
+ std::unique_ptr<GLContext> m_sharingGLContext;
+#endif
+
</ins><span class="cx"> private:
</span><span class="cx"> static std::unique_ptr<PlatformDisplay> createPlatformDisplay();
</span><span class="cx">
</span><span class="lines">@@ -90,9 +94,6 @@
</span><span class="cx"> int m_eglMajorVersion { 0 };
</span><span class="cx"> int m_eglMinorVersion { 0 };
</span><span class="cx"> #endif
</span><del>-#if USE(EGL) || USE(GLX)
- std::unique_ptr<GLContext> m_sharingGLContext;
-#endif
</del><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> } // namespace WebCore
</span></span></pre></div>
<a id="releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsglxGLContextGLXcpp"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.cpp (210175 => 210176)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.cpp 2016-12-27 16:44:37 UTC (rev 210175)
+++ releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.cpp 2016-12-27 17:02:01 UTC (rev 210176)
</span><span class="lines">@@ -249,6 +249,7 @@
</span><span class="cx">
</span><span class="cx"> GLContextGLX::GLContextGLX(PlatformDisplay& display, XUniqueGLXContext&& context, GLNativeWindowType window)
</span><span class="cx"> : GLContext(display)
</span><ins>+ , m_x11Display(downcast<PlatformDisplayX11>(m_display).native())
</ins><span class="cx"> , m_context(WTFMove(context))
</span><span class="cx"> , m_window(static_cast<Window>(window))
</span><span class="cx"> {
</span><span class="lines">@@ -256,6 +257,7 @@
</span><span class="cx">
</span><span class="cx"> GLContextGLX::GLContextGLX(PlatformDisplay& display, XUniqueGLXContext&& context, XUniqueGLXPbuffer&& pbuffer)
</span><span class="cx"> : GLContext(display)
</span><ins>+ , m_x11Display(downcast<PlatformDisplayX11>(m_display).native())
</ins><span class="cx"> , m_context(WTFMove(context))
</span><span class="cx"> , m_pbuffer(WTFMove(pbuffer))
</span><span class="cx"> {
</span><span class="lines">@@ -263,6 +265,7 @@
</span><span class="cx">
</span><span class="cx"> GLContextGLX::GLContextGLX(PlatformDisplay& display, XUniqueGLXContext&& context, XUniquePixmap&& pixmap, XUniqueGLXPixmap&& glxPixmap)
</span><span class="cx"> : GLContext(display)
</span><ins>+ , m_x11Display(downcast<PlatformDisplayX11>(m_display).native())
</ins><span class="cx"> , m_context(WTFMove(context))
</span><span class="cx"> , m_pixmap(WTFMove(pixmap))
</span><span class="cx"> , m_glxPixmap(WTFMove(glxPixmap))
</span><span class="lines">@@ -276,7 +279,7 @@
</span><span class="cx">
</span><span class="cx"> if (m_context) {
</span><span class="cx"> glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
</span><del>- glXMakeCurrent(downcast<PlatformDisplayX11>(m_display).native(), None, None);
</del><ins>+ glXMakeCurrent(m_x11Display, None, None);
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -293,7 +296,7 @@
</span><span class="cx"> int x, y;
</span><span class="cx"> Window rootWindow;
</span><span class="cx"> unsigned int width, height, borderWidth, depth;
</span><del>- if (!XGetGeometry(downcast<PlatformDisplayX11>(m_display).native(), m_window, &rootWindow, &x, &y, &width, &height, &borderWidth, &depth))
</del><ins>+ if (!XGetGeometry(m_x11Display, m_window, &rootWindow, &x, &y, &width, &height, &borderWidth, &depth))
</ins><span class="cx"> return IntSize();
</span><span class="cx">
</span><span class="cx"> return IntSize(width, height);
</span><span class="lines">@@ -307,20 +310,19 @@
</span><span class="cx"> if (glXGetCurrentContext() == m_context.get())
</span><span class="cx"> return true;
</span><span class="cx">
</span><del>- Display* display = downcast<PlatformDisplayX11>(m_display).native();
</del><span class="cx"> if (m_window)
</span><del>- return glXMakeCurrent(display, m_window, m_context.get());
</del><ins>+ return glXMakeCurrent(m_x11Display, m_window, m_context.get());
</ins><span class="cx">
</span><span class="cx"> if (m_pbuffer)
</span><del>- return glXMakeCurrent(display, m_pbuffer.get(), m_context.get());
</del><ins>+ return glXMakeCurrent(m_x11Display, m_pbuffer.get(), m_context.get());
</ins><span class="cx">
</span><del>- return ::glXMakeCurrent(display, m_glxPixmap.get(), m_context.get());
</del><ins>+ return ::glXMakeCurrent(m_x11Display, m_glxPixmap.get(), m_context.get());
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> void GLContextGLX::swapBuffers()
</span><span class="cx"> {
</span><span class="cx"> if (m_window)
</span><del>- glXSwapBuffers(downcast<PlatformDisplayX11>(m_display).native(), m_window);
</del><ins>+ glXSwapBuffers(m_x11Display, m_window);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> void GLContextGLX::waitNative()
</span><span class="lines">@@ -330,7 +332,7 @@
</span><span class="cx">
</span><span class="cx"> void GLContextGLX::swapInterval(int interval)
</span><span class="cx"> {
</span><del>- if (!hasSGISwapControlExtension(downcast<PlatformDisplayX11>(m_display).native()))
</del><ins>+ if (!hasSGISwapControlExtension(m_x11Display))
</ins><span class="cx"> return;
</span><span class="cx"> glXSwapIntervalSGI(interval);
</span><span class="cx"> }
</span><span class="lines">@@ -341,7 +343,7 @@
</span><span class="cx"> return m_cairoDevice;
</span><span class="cx">
</span><span class="cx"> #if ENABLE(ACCELERATED_2D_CANVAS) && CAIRO_HAS_GLX_FUNCTIONS
</span><del>- m_cairoDevice = cairo_glx_device_create(downcast<PlatformDisplayX11>(m_display).native(), m_context.get());
</del><ins>+ m_cairoDevice = cairo_glx_device_create(m_x11Display, m_context.get());
</ins><span class="cx"> #endif
</span><span class="cx">
</span><span class="cx"> return m_cairoDevice;
</span></span></pre></div>
<a id="releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsglxGLContextGLXh"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.h (210175 => 210176)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.h 2016-12-27 16:44:37 UTC (rev 210175)
+++ releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/glx/GLContextGLX.h 2016-12-27 17:02:01 UTC (rev 210176)
</span><span class="lines">@@ -28,6 +28,7 @@
</span><span class="cx"> typedef unsigned char GLubyte;
</span><span class="cx"> typedef unsigned long Window;
</span><span class="cx"> typedef void* ContextKeyType;
</span><ins>+typedef struct _XDisplay Display;
</ins><span class="cx">
</span><span class="cx"> namespace WebCore {
</span><span class="cx">
</span><span class="lines">@@ -61,6 +62,7 @@
</span><span class="cx"> static std::unique_ptr<GLContextGLX> createPbufferContext(PlatformDisplay&, GLXContext sharingContext = nullptr);
</span><span class="cx"> static std::unique_ptr<GLContextGLX> createPixmapContext(PlatformDisplay&, GLXContext sharingContext = nullptr);
</span><span class="cx">
</span><ins>+ Display* m_x11Display { nullptr };
</ins><span class="cx"> XUniqueGLXContext m_context;
</span><span class="cx"> Window m_window { 0 };
</span><span class="cx"> XUniqueGLXPbuffer m_pbuffer;
</span></span></pre></div>
<a id="releasesWebKitGTKwebkit214SourceWebCoreplatformgraphicsx11PlatformDisplayX11cpp"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/x11/PlatformDisplayX11.cpp (210175 => 210176)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/x11/PlatformDisplayX11.cpp 2016-12-27 16:44:37 UTC (rev 210175)
+++ releases/WebKitGTK/webkit-2.14/Source/WebCore/platform/graphics/x11/PlatformDisplayX11.cpp 2016-12-27 17:02:01 UTC (rev 210176)
</span><span class="lines">@@ -56,6 +56,10 @@
</span><span class="cx">
</span><span class="cx"> PlatformDisplayX11::~PlatformDisplayX11()
</span><span class="cx"> {
</span><ins>+#if USE(EGL) || USE(GLX)
+ // Clear the sharing context before releasing the display.
+ m_sharingGLContext = nullptr;
+#endif
</ins><span class="cx"> if (m_ownedDisplay)
</span><span class="cx"> XCloseDisplay(m_display);
</span><span class="cx"> }
</span></span></pre>
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