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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/212167">212167</a></dd>
<dt>Author</dt> <dd>timothy_horton@apple.com</dd>
<dt>Date</dt> <dd>2017-02-10 17:09:55 -0800 (Fri, 10 Feb 2017)</dd>
</dl>
<h3>Log Message</h3>
<pre>Infinite UI process hang under ensurePositionInformationIsUpToDate
https://bugs.webkit.org/show_bug.cgi?id=168154
<rdar://problem/30428673>
Reviewed by Simon Fraser.
Source/WebKit2:
* UIProcess/ios/WKContentViewInteraction.mm:
(-[WKContentView cleanupInteraction]):
If the web process crashes or we're being torn down for another reason,
assume that we aren't ever going to receive any pending async interaction
information update. Otherwise, ensurePositionInformationIsUpToDate can end
up waiting for it forever.
Tools:
* TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
* TestWebKitAPI/Tests/WebKit2Cocoa/InteractionDeadlockAfterCrash.mm: Added.
(recursiveFindHighlightLongPressRecognizer):
(TEST):
Add a somewhat nasty test that does an async interaction information update, but
kills the Web process before it arrives, and then does a sync interaction
information update, which will wait for the oustanding async interaction
information update if we still think it's coming. Before the patch, this
test times out with the UI process stuck under ensurePositionInformationIsUpToDate.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2UIProcessiosWKContentViewInteractionmm">trunk/Source/WebKit2/UIProcess/ios/WKContentViewInteraction.mm</a></li>
<li><a href="#trunkToolsChangeLog">trunk/Tools/ChangeLog</a></li>
<li><a href="#trunkToolsTestWebKitAPITestWebKitAPIxcodeprojprojectpbxproj">trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkToolsTestWebKitAPITestsWebKit2CocoaInteractionDeadlockAfterCrashmm">trunk/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/InteractionDeadlockAfterCrash.mm</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (212166 => 212167)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog 2017-02-11 00:44:42 UTC (rev 212166)
+++ trunk/Source/WebKit2/ChangeLog 2017-02-11 01:09:55 UTC (rev 212167)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2017-02-10 Tim Horton <timothy_horton@apple.com>
+
+ Infinite UI process hang under ensurePositionInformationIsUpToDate
+ https://bugs.webkit.org/show_bug.cgi?id=168154
+ <rdar://problem/30428673>
+
+ Reviewed by Simon Fraser.
+
+ * UIProcess/ios/WKContentViewInteraction.mm:
+ (-[WKContentView cleanupInteraction]):
+ If the web process crashes or we're being torn down for another reason,
+ assume that we aren't ever going to receive any pending async interaction
+ information update. Otherwise, ensurePositionInformationIsUpToDate can end
+ up waiting for it forever.
+
</ins><span class="cx"> 2017-02-10 Andrew Gold <agold@apple.com>
</span><span class="cx">
</span><span class="cx"> Add mediaStreamEnabled property to WKPreferences for Cocoa.
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessiosWKContentViewInteractionmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/ios/WKContentViewInteraction.mm (212166 => 212167)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/ios/WKContentViewInteraction.mm 2017-02-11 00:44:42 UTC (rev 212166)
+++ trunk/Source/WebKit2/UIProcess/ios/WKContentViewInteraction.mm 2017-02-11 01:09:55 UTC (rev 212167)
</span><span class="lines">@@ -632,6 +632,7 @@
</span><span class="cx"> [_formInputSession invalidate];
</span><span class="cx"> _formInputSession = nil;
</span><span class="cx"> [_highlightView removeFromSuperview];
</span><ins>+ _outstandingPositionInformationRequest = std::nullopt;
</ins><span class="cx">
</span><span class="cx"> if (_interactionViewsContainerView) {
</span><span class="cx"> [self.layer removeObserver:self forKeyPath:@"transform"];
</span></span></pre></div>
<a id="trunkToolsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Tools/ChangeLog (212166 => 212167)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/ChangeLog 2017-02-11 00:44:42 UTC (rev 212166)
+++ trunk/Tools/ChangeLog 2017-02-11 01:09:55 UTC (rev 212167)
</span><span class="lines">@@ -1,3 +1,21 @@
</span><ins>+2017-02-10 Tim Horton <timothy_horton@apple.com>
+
+ Infinite UI process hang under ensurePositionInformationIsUpToDate
+ https://bugs.webkit.org/show_bug.cgi?id=168154
+ <rdar://problem/30428673>
+
+ Reviewed by Simon Fraser.
+
+ * TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
+ * TestWebKitAPI/Tests/WebKit2Cocoa/InteractionDeadlockAfterCrash.mm: Added.
+ (recursiveFindHighlightLongPressRecognizer):
+ (TEST):
+ Add a somewhat nasty test that does an async interaction information update, but
+ kills the Web process before it arrives, and then does a sync interaction
+ information update, which will wait for the oustanding async interaction
+ information update if we still think it's coming. Before the patch, this
+ test times out with the UI process stuck under ensurePositionInformationIsUpToDate.
+
</ins><span class="cx"> 2017-02-10 Simon Fraser <simon.fraser@apple.com>
</span><span class="cx">
</span><span class="cx"> Make sure the "inwindow" flag propagates to TiledBackings for masks and reflections
</span></span></pre></div>
<a id="trunkToolsTestWebKitAPITestWebKitAPIxcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj (212166 => 212167)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj 2017-02-11 00:44:42 UTC (rev 212166)
+++ trunk/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj 2017-02-11 01:09:55 UTC (rev 212167)
</span><span class="lines">@@ -61,6 +61,7 @@
</span><span class="cx"> 2D1C04A71D76298B000A6816 /* TestNavigationDelegate.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2D1C04A61D76298B000A6816 /* TestNavigationDelegate.mm */; };
</span><span class="cx"> 2D4CF8BD1D8360CC0001CE8D /* WKThumbnailView.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2D4CF8BC1D8360CC0001CE8D /* WKThumbnailView.mm */; };
</span><span class="cx"> 2D51A0C71C8BF00C00765C45 /* DOMHTMLVideoElementWrapper.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2D51A0C51C8BF00400765C45 /* DOMHTMLVideoElementWrapper.mm */; };
</span><ins>+ 2DB0232F1E4E871800707123 /* InteractionDeadlockAfterCrash.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DB0232E1E4E871800707123 /* InteractionDeadlockAfterCrash.mm */; };
</ins><span class="cx"> 2DC4CF771D2D9DD800ECCC94 /* DataDetection.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DC4CF761D2D9DD800ECCC94 /* DataDetection.mm */; };
</span><span class="cx"> 2DD7D3AF178227B30026E1E3 /* lots-of-text-vertical-lr.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 2DD7D3AE178227AC0026E1E3 /* lots-of-text-vertical-lr.html */; };
</span><span class="cx"> 2DE71AFE1D49C0BD00904094 /* AnimatedResize.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DE71AFD1D49C0BD00904094 /* AnimatedResize.mm */; };
</span><span class="lines">@@ -885,6 +886,7 @@
</span><span class="cx"> 2D640B5417875DFF00BFAF99 /* ScrollPinningBehaviors.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ScrollPinningBehaviors.cpp; sourceTree = "<group>"; };
</span><span class="cx"> 2D8104CB1BEC13E70020DA46 /* FindInPage.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = FindInPage.mm; sourceTree = "<group>"; };
</span><span class="cx"> 2D9A53AE1B31FA8D0074D5AA /* ShrinkToFit.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = ShrinkToFit.mm; sourceTree = "<group>"; };
</span><ins>+ 2DB0232E1E4E871800707123 /* InteractionDeadlockAfterCrash.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = InteractionDeadlockAfterCrash.mm; sourceTree = "<group>"; };
</ins><span class="cx"> 2DC4CF761D2D9DD800ECCC94 /* DataDetection.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = DataDetection.mm; sourceTree = "<group>"; };
</span><span class="cx"> 2DD355351BD08378005DF4A7 /* AutoLayoutIntegration.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = AutoLayoutIntegration.mm; sourceTree = "<group>"; };
</span><span class="cx"> 2DD7D3A9178205D00026E1E3 /* ResizeReversePaginatedWebView.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ResizeReversePaginatedWebView.cpp; sourceTree = "<group>"; };
</span><span class="lines">@@ -1554,6 +1556,7 @@
</span><span class="cx"> 51A587841D272EF3004BA9AF /* IndexedDBDatabaseProcessKill.mm */,
</span><span class="cx"> 51BCEE491C84F4AF0042C82E /* IndexedDBMultiProcess.mm */,
</span><span class="cx"> 51B1EE8D1C80F5880064FB98 /* IndexedDBPersistence.mm */,
</span><ins>+ 2DB0232E1E4E871800707123 /* InteractionDeadlockAfterCrash.mm */,
</ins><span class="cx"> 37D36ED61AF42ECD00BAF5D9 /* LoadAlternateHTMLString.mm */,
</span><span class="cx"> A125478D1DB18B9400358564 /* LoadDataWithNilMIMEType.mm */,
</span><span class="cx"> 57901FAC1CAF12C200ED64F9 /* LoadInvalidURLRequest.mm */,
</span><span class="lines">@@ -2680,6 +2683,7 @@
</span><span class="cx"> CEBCA12F1E3A660100C73293 /* OverrideContentSecurityPolicy.mm in Sources */,
</span><span class="cx"> 7CCB4DA91C83AE7300CC6918 /* PageGroup.cpp in Sources */,
</span><span class="cx"> 5769C50B1D9B0002000847FB /* SerializedCryptoKeyWrap.mm in Sources */,
</span><ins>+ 2DB0232F1E4E871800707123 /* InteractionDeadlockAfterCrash.mm in Sources */,
</ins><span class="cx"> 7CCE7F071A411AE600447C4C /* PageLoadBasic.cpp in Sources */,
</span><span class="cx"> 7CCE7F081A411AE600447C4C /* PageLoadDidChangeLocationWithinPageForFrame.cpp in Sources */,
</span><span class="cx"> 7CCE7EC71A411A7E00447C4C /* PageVisibilityStateWithWindowChanges.mm in Sources */,
</span></span></pre></div>
<a id="trunkToolsTestWebKitAPITestsWebKit2CocoaInteractionDeadlockAfterCrashmm"></a>
<div class="addfile"><h4>Added: trunk/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/InteractionDeadlockAfterCrash.mm (0 => 212167)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/InteractionDeadlockAfterCrash.mm (rev 0)
+++ trunk/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/InteractionDeadlockAfterCrash.mm 2017-02-11 01:09:55 UTC (rev 212167)
</span><span class="lines">@@ -0,0 +1,85 @@
</span><ins>+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#import "PlatformUtilities.h"
+#import "Test.h"
+#import "TestNavigationDelegate.h"
+#import <WebKit/WKWebViewConfigurationPrivate.h>
+#import <WebKit/WKWebViewPrivate.h>
+#import <wtf/RetainPtr.h>
+
+@interface NSObject ()
+
+- (BOOL)hasSelectablePositionAtPoint:(CGPoint)point;
+
+@end
+
+#if PLATFORM(IOS) && WK_API_ENABLED
+
+static UIGestureRecognizer *recursiveFindHighlightLongPressRecognizer(UIView *view)
+{
+ for (UIGestureRecognizer *recognizer in view.gestureRecognizers) {
+ if ([recognizer isKindOfClass:NSClassFromString(@"_UIWebHighlightLongPressGestureRecognizer")])
+ return recognizer;
+ }
+
+ for (UIView *subview in view.subviews) {
+ UIGestureRecognizer *recognizer = recursiveFindHighlightLongPressRecognizer(subview);
+ if (recognizer)
+ return recognizer;
+ }
+
+ return nil;
+}
+
+TEST(WebKit2, InteractionDeadlockAfterCrash)
+{
+ RetainPtr<WKWebViewConfiguration> configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
+
+ RetainPtr<WKWebView> webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 100, 100) configuration:configuration.get()]);
+
+ [webView loadHTMLString:@"test" baseURL:nil];
+ [webView _test_waitForDidFinishNavigation];
+
+ UIGestureRecognizer *highlightLongPressRecognizer = recursiveFindHighlightLongPressRecognizer(webView.get());
+ UIView *interactionView = highlightLongPressRecognizer.view;
+ EXPECT_NOT_NULL(highlightLongPressRecognizer);
+
+ // This will start an asynchronous interaction information update.
+ BOOL shouldBegin = [[highlightLongPressRecognizer delegate] gestureRecognizerShouldBegin:highlightLongPressRecognizer];
+ EXPECT_TRUE(shouldBegin);
+
+ [webView _killWebContentProcessAndResetState];
+
+ [webView loadHTMLString:@"test" baseURL:nil];
+ [webView _test_waitForDidFinishNavigation];
+
+ // This will synchronously ensure we have up-to-date interaction information.
+ [interactionView hasSelectablePositionAtPoint:CGPointZero];
+}
+
+#endif
</ins></span></pre>
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