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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/173029">173029</a></dd>
<dt>Author</dt> <dd>timothy_horton@apple.com</dd>
<dt>Date</dt> <dd>2014-08-27 16:00:55 -0700 (Wed, 27 Aug 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Occasional crashes in commitTransientZoom's transaction completion block
https://bugs.webkit.org/show_bug.cgi?id=136309
<rdar://problem/17215064>
Reviewed by Dan Bernstein.
* WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:
(WebKit::TiledCoreAnimationDrawingArea::commitTransientZoom):
Hold a reference to zoomLayer and the WebPage. It's possible that either
of these things could have gone away by the time the transaction is committed.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2WebProcessWebPagemacTiledCoreAnimationDrawingAreamm">trunk/Source/WebKit2/WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (173028 => 173029)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog        2014-08-27 22:56:06 UTC (rev 173028)
+++ trunk/Source/WebKit2/ChangeLog        2014-08-27 23:00:55 UTC (rev 173029)
</span><span class="lines">@@ -1,3 +1,16 @@
</span><ins>+2014-08-27 Tim Horton <timothy_horton@apple.com>
+
+ Occasional crashes in commitTransientZoom's transaction completion block
+ https://bugs.webkit.org/show_bug.cgi?id=136309
+ <rdar://problem/17215064>
+
+ Reviewed by Dan Bernstein.
+
+ * WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:
+ (WebKit::TiledCoreAnimationDrawingArea::commitTransientZoom):
+ Hold a reference to zoomLayer and the WebPage. It's possible that either
+ of these things could have gone away by the time the transaction is committed.
+
</ins><span class="cx"> 2014-08-27 Benjamin Poulain <bpoulain@apple.com>
</span><span class="cx">
</span><span class="cx"> [iOS WK2] Provide a delegate callback to skip Geolocation authorization per page for WebApp
</span></span></pre></div>
<a id="trunkSourceWebKit2WebProcessWebPagemacTiledCoreAnimationDrawingAreamm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm (173028 => 173029)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm        2014-08-27 22:56:06 UTC (rev 173028)
+++ trunk/Source/WebKit2/WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm        2014-08-27 23:00:55 UTC (rev 173029)
</span><span class="lines">@@ -637,14 +637,17 @@
</span><span class="cx"> if (PlatformCALayer* shadowLayer = shadowLayerForTransientZoom())
</span><span class="cx"> shadowCALayer = shadowLayer->platformLayer();
</span><span class="cx">
</span><del>- PlatformCALayer* zoomLayer = layerForTransientZoom();
</del><ins>+ RefPtr<PlatformCALayer> zoomLayer = layerForTransientZoom();
+ RefPtr<WebPage> page = &m_webPage;
</ins><span class="cx">
</span><span class="cx"> [CATransaction begin];
</span><del>- [CATransaction setCompletionBlock:^(void) {
</del><ins>+ [CATransaction setCompletionBlock:[zoomLayer, shadowCALayer, page, scale, origin] () {
</ins><span class="cx"> zoomLayer->removeAnimationForKey("transientZoomCommit");
</span><span class="cx"> if (shadowCALayer)
</span><span class="cx"> [shadowCALayer removeAllAnimations];
</span><del>- applyTransientZoomToPage(scale, origin);
</del><ins>+
+ if (TiledCoreAnimationDrawingArea* drawingArea = static_cast<TiledCoreAnimationDrawingArea*>(page->drawingArea()))
+ drawingArea->applyTransientZoomToPage(scale, origin);
</ins><span class="cx"> }];
</span><span class="cx">
</span><span class="cx"> zoomLayer->addAnimationForKey("transientZoomCommit", renderViewAnimation.get());
</span></span></pre>
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