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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/181172">181172</a></dd>
<dt>Author</dt> <dd>mmaxfield@apple.com</dd>
<dt>Date</dt> <dd>2015-03-06 11:08:55 -0800 (Fri, 06 Mar 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Crash in -[WebCascadeList objectAtIndex:] + 195
https://bugs.webkit.org/show_bug.cgi?id=141274
Reviewed by David Kilzer.
Source/WebCore:
CTFontDescriptorRefs can live forever in caches inside CoreText, which means our
WebCascadeList can too.
Test: platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html
* platform/graphics/FontCascade.cpp:
(WebCore::FontCascade::FontCascade): Initialize WeakPtrFactory.
* platform/graphics/FontCascade.h:
(WebCore::FontCascade::createWeakPtr):
* platform/graphics/mac/ComplexTextControllerCoreText.mm: Migrate the raw pointer
to WeakPtr.
(-[WebCascadeList initWithFont:character:]):
(-[WebCascadeList count]):
(-[WebCascadeList objectAtIndex:]):
Source/WTF:
* wtf/WeakPtr.h:
(WTF::WeakPtrFactory::createWeakPtr): WebCascadeList uses a const FontCascade,
and it calls createWeakPtr() on it. Therefore, createWeakPtr has to be marked
const.
(WTF::WeakPtrFactory::operator=): Removed because it was broken and had no
callers
LayoutTests:
* platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list-expected.txt: Added.
* platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html: Added.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWTFChangeLog">trunk/Source/WTF/ChangeLog</a></li>
<li><a href="#trunkSourceWTFwtfWeakPtrh">trunk/Source/WTF/wtf/WeakPtr.h</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsFontCascadecpp">trunk/Source/WebCore/platform/graphics/FontCascade.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsFontCascadeh">trunk/Source/WebCore/platform/graphics/FontCascade.h</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsmacComplexTextControllerCoreTextmm">trunk/Source/WebCore/platform/graphics/mac/ComplexTextControllerCoreText.mm</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsplatformmacfasttextcrashcomplextextcontrollercustomcascadelistexpectedtxt">trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list-expected.txt</a></li>
<li><a href="#trunkLayoutTestsplatformmacfasttextcrashcomplextextcontrollercustomcascadelisthtml">trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/LayoutTests/ChangeLog 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -1,3 +1,13 @@
</span><ins>+2015-03-06 Myles C. Maxfield <mmaxfield@apple.com>
+
+ Crash in -[WebCascadeList objectAtIndex:] + 195
+ https://bugs.webkit.org/show_bug.cgi?id=141274
+
+ Reviewed by David Kilzer.
+
+ * platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list-expected.txt: Added.
+ * platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html: Added.
+
</ins><span class="cx"> 2015-03-06 Said Abou-Hallawa <sabouhallawa@apple.com>
</span><span class="cx">
</span><span class="cx"> Setting any of the <object> element plugin controlling attributes does not have any affect.
</span></span></pre></div>
<a id="trunkLayoutTestsplatformmacfasttextcrashcomplextextcontrollercustomcascadelistexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list-expected.txt (0 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list-expected.txt (rev 0)
+++ trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list-expected.txt 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -0,0 +1 @@
</span><ins>+Passed - no crash.
</ins></span></pre></div>
<a id="trunkLayoutTestsplatformmacfasttextcrashcomplextextcontrollercustomcascadelisthtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html (0 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html (rev 0)
+++ trunk/LayoutTests/platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -0,0 +1,25 @@
</span><ins>+<!DOCTYPE html>
+<html>
+ <head>
+ <script src="../../../../resources/gc.js"></script>
+ <meta charset="utf-8"/>
+ </head>
+ <body>
+ <p>
+ <math><mi id="sin">sin</mi></math>
+ <math><mi mathvariant="bold">x</mi></math>
+ </p>
+ <p>
+ <math><mo>-</mo><mi>sin</mi><mi>x</mi></math>
+ </p>
+
+ </body>
+<script>
+ document.getElementById("sin").setAttribute("style","text-rendering:auto;");
+ document.getElementById("sin").appendChild(document.createTextNode('\u6888\u9867\uaa6f\u9b40\u7420\uf87f\u8491\ud608\u39bd\ucddb\u5d99\ud529\u8c59\u9e80'));
+ window.gc();
+ if (window.testRunner)
+ testRunner.dumpAsText();
+ document.body.innerText = "Passed - no crash.";
+</script>
+</html>
</ins></span></pre></div>
<a id="trunkSourceWTFChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/ChangeLog (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/ChangeLog 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/Source/WTF/ChangeLog 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2015-03-06 Myles C. Maxfield <mmaxfield@apple.com>
+
+ Crash in -[WebCascadeList objectAtIndex:] + 195
+ https://bugs.webkit.org/show_bug.cgi?id=141274
+
+ Reviewed by David Kilzer.
+
+ * wtf/WeakPtr.h:
+ (WTF::WeakPtrFactory::createWeakPtr): WebCascadeList uses a const FontCascade,
+ and it calls createWeakPtr() on it. Therefore, createWeakPtr has to be marked
+ const.
+ (WTF::WeakPtrFactory::operator=): Removed because it was broken and had no
+ callers
+
</ins><span class="cx"> 2015-03-06 Simon Fraser <simon.fraser@apple.com>
</span><span class="cx">
</span><span class="cx"> Allow tree dumping functions to be used in release builds by switching a flag
</span></span></pre></div>
<a id="trunkSourceWTFwtfWeakPtrh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/wtf/WeakPtr.h (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/WeakPtr.h 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/Source/WTF/wtf/WeakPtr.h 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -99,7 +99,6 @@
</span><span class="cx"> operator bool() const { return m_ref->get(); }
</span><span class="cx">
</span><span class="cx"> WeakPtr& operator=(const WeakPtr& o) { m_ref = o.m_ref.copyRef(); return *this; }
</span><del>- template<typename U> WeakPtr& operator=(const WeakPtr<U>& o) { m_ref = o.m_ref.copyRef(); return *this; }
</del><span class="cx"> WeakPtr& operator=(std::nullptr_t) { m_ref = WeakReference<T>::create(nullptr); return *this; }
</span><span class="cx">
</span><span class="cx"> T* operator->() const { return m_ref->get(); }
</span><span class="lines">@@ -123,7 +122,7 @@
</span><span class="cx"> ~WeakPtrFactory() { m_ref->clear(); }
</span><span class="cx">
</span><span class="cx"> // We should consider having createWeakPtr populate m_ref the first time createWeakPtr is called.
</span><del>- WeakPtr<T> createWeakPtr() { return WeakPtr<T>(m_ref.copyRef()); }
</del><ins>+ WeakPtr<T> createWeakPtr() const { return WeakPtr<T>(m_ref.copyRef()); }
</ins><span class="cx">
</span><span class="cx"> void revokeAll()
</span><span class="cx"> {
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/Source/WebCore/ChangeLog 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -1,5 +1,27 @@
</span><span class="cx"> 2015-03-06 Myles C. Maxfield <mmaxfield@apple.com>
</span><span class="cx">
</span><ins>+ Crash in -[WebCascadeList objectAtIndex:] + 195
+ https://bugs.webkit.org/show_bug.cgi?id=141274
+
+ Reviewed by David Kilzer.
+
+ CTFontDescriptorRefs can live forever in caches inside CoreText, which means our
+ WebCascadeList can too.
+
+ Test: platform/mac/fast/text/crash-complextextcontroller-custom-cascade-list.html
+
+ * platform/graphics/FontCascade.cpp:
+ (WebCore::FontCascade::FontCascade): Initialize WeakPtrFactory.
+ * platform/graphics/FontCascade.h:
+ (WebCore::FontCascade::createWeakPtr):
+ * platform/graphics/mac/ComplexTextControllerCoreText.mm: Migrate the raw pointer
+ to WeakPtr.
+ (-[WebCascadeList initWithFont:character:]):
+ (-[WebCascadeList count]):
+ (-[WebCascadeList objectAtIndex:]):
+
+2015-03-06 Myles C. Maxfield <mmaxfield@apple.com>
+
</ins><span class="cx"> Rename BreakingContextInlineHeaders.h to BreakingContext.h
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=142404
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsFontCascadecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/FontCascade.cpp (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/FontCascade.cpp 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/Source/WebCore/platform/graphics/FontCascade.cpp 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -108,7 +108,8 @@
</span><span class="cx"> // ============================================================================================
</span><span class="cx">
</span><span class="cx"> FontCascade::FontCascade()
</span><del>- : m_letterSpacing(0)
</del><ins>+ : m_weakPtrFactory(this)
+ , m_letterSpacing(0)
</ins><span class="cx"> , m_wordSpacing(0)
</span><span class="cx"> , m_useBackslashAsYenSymbol(false)
</span><span class="cx"> , m_typesettingFeatures(0)
</span><span class="lines">@@ -117,6 +118,7 @@
</span><span class="cx">
</span><span class="cx"> FontCascade::FontCascade(const FontDescription& fd, float letterSpacing, float wordSpacing)
</span><span class="cx"> : m_fontDescription(fd)
</span><ins>+ , m_weakPtrFactory(this)
</ins><span class="cx"> , m_letterSpacing(letterSpacing)
</span><span class="cx"> , m_wordSpacing(wordSpacing)
</span><span class="cx"> , m_useBackslashAsYenSymbol(useBackslashAsYenSignForFamily(fd.firstFamily()))
</span><span class="lines">@@ -127,6 +129,7 @@
</span><span class="cx"> // FIXME: We should make this constructor platform-independent.
</span><span class="cx"> FontCascade::FontCascade(const FontPlatformData& fontData, FontSmoothingMode fontSmoothingMode)
</span><span class="cx"> : m_fonts(FontCascadeFonts::createForPlatformFont(fontData))
</span><ins>+ , m_weakPtrFactory(this)
</ins><span class="cx"> , m_letterSpacing(0)
</span><span class="cx"> , m_wordSpacing(0)
</span><span class="cx"> , m_useBackslashAsYenSymbol(false)
</span><span class="lines">@@ -144,7 +147,8 @@
</span><span class="cx"> // FIXME: We should make this constructor platform-independent.
</span><span class="cx"> #if PLATFORM(IOS)
</span><span class="cx"> FontCascade::FontCascade(const FontPlatformData& fontData, PassRefPtr<FontSelector> fontSelector)
</span><del>- : m_letterSpacing(0)
</del><ins>+ : m_weakPtrFactory(this)
+ , m_letterSpacing(0)
</ins><span class="cx"> , m_wordSpacing(0)
</span><span class="cx"> , m_typesettingFeatures(computeTypesettingFeatures())
</span><span class="cx"> {
</span><span class="lines">@@ -160,6 +164,7 @@
</span><span class="cx"> FontCascade::FontCascade(const FontCascade& other)
</span><span class="cx"> : m_fontDescription(other.m_fontDescription)
</span><span class="cx"> , m_fonts(other.m_fonts)
</span><ins>+ , m_weakPtrFactory(this)
</ins><span class="cx"> , m_letterSpacing(other.m_letterSpacing)
</span><span class="cx"> , m_wordSpacing(other.m_wordSpacing)
</span><span class="cx"> , m_useBackslashAsYenSymbol(other.m_useBackslashAsYenSymbol)
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsFontCascadeh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/FontCascade.h (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/FontCascade.h 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/Source/WebCore/platform/graphics/FontCascade.h 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -34,6 +34,7 @@
</span><span class="cx"> #include "TypesettingFeatures.h"
</span><span class="cx"> #include <wtf/HashMap.h>
</span><span class="cx"> #include <wtf/HashSet.h>
</span><ins>+#include <wtf/WeakPtr.h>
</ins><span class="cx"> #include <wtf/unicode/CharacterNames.h>
</span><span class="cx">
</span><span class="cx"> // "X11/X.h" defines Complex to 0 and conflicts
</span><span class="lines">@@ -208,6 +209,8 @@
</span><span class="cx">
</span><span class="cx"> bool primaryFontIsSystemFont() const;
</span><span class="cx">
</span><ins>+ WeakPtr<FontCascade> createWeakPtr() const { return m_weakPtrFactory.createWeakPtr(); }
+
</ins><span class="cx"> private:
</span><span class="cx"> enum ForTextEmphasisOrNot { NotForTextEmphasis, ForTextEmphasis };
</span><span class="cx">
</span><span class="lines">@@ -336,6 +339,7 @@
</span><span class="cx">
</span><span class="cx"> FontDescription m_fontDescription;
</span><span class="cx"> mutable RefPtr<FontCascadeFonts> m_fonts;
</span><ins>+ WeakPtrFactory<FontCascade> m_weakPtrFactory;
</ins><span class="cx"> float m_letterSpacing;
</span><span class="cx"> float m_wordSpacing;
</span><span class="cx"> mutable bool m_useBackslashAsYenSymbol;
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsmacComplexTextControllerCoreTextmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/mac/ComplexTextControllerCoreText.mm (181171 => 181172)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/mac/ComplexTextControllerCoreText.mm 2015-03-06 19:06:30 UTC (rev 181171)
+++ trunk/Source/WebCore/platform/graphics/mac/ComplexTextControllerCoreText.mm 2015-03-06 19:08:55 UTC (rev 181172)
</span><span class="lines">@@ -31,6 +31,7 @@
</span><span class="cx"> #include "FontCascade.h"
</span><span class="cx"> #include "TextRun.h"
</span><span class="cx"> #include "WebCoreSystemInterface.h"
</span><ins>+#include <wtf/WeakPtr.h>
</ins><span class="cx">
</span><span class="cx"> #if PLATFORM(IOS)
</span><span class="cx"> #include <CoreText/CoreText.h>
</span><span class="lines">@@ -38,9 +39,10 @@
</span><span class="cx"> #include <ApplicationServices/ApplicationServices.h>
</span><span class="cx"> #endif
</span><span class="cx">
</span><ins>+// Note: CTFontDescriptorRefs can live forever in caches inside CoreText, so this object can too.
</ins><span class="cx"> @interface WebCascadeList : NSArray {
</span><span class="cx"> @private
</span><del>- const WebCore::FontCascade* _font;
</del><ins>+ WeakPtr<WebCore::FontCascade> _font;
</ins><span class="cx"> UChar32 _character;
</span><span class="cx"> NSUInteger _count;
</span><span class="cx"> Vector<RetainPtr<CTFontDescriptorRef>, 16> _fontDescriptors;
</span><span class="lines">@@ -57,7 +59,7 @@
</span><span class="cx"> if (!(self = [super init]))
</span><span class="cx"> return nil;
</span><span class="cx">
</span><del>- _font = font;
</del><ins>+ _font = font->createWeakPtr();
</ins><span class="cx"> _character = character;
</span><span class="cx">
</span><span class="cx"> // By the time a WebCascadeList is used, the FontCascade has already been asked to realize all of its
</span><span class="lines">@@ -70,11 +72,14 @@
</span><span class="cx">
</span><span class="cx"> - (NSUInteger)count
</span><span class="cx"> {
</span><del>- return _count;
</del><ins>+ return _font ? _count : 0;
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> - (id)objectAtIndex:(NSUInteger)index
</span><span class="cx"> {
</span><ins>+ if (!_font)
+ return nil;
+
</ins><span class="cx"> CTFontDescriptorRef fontDescriptor;
</span><span class="cx"> if (index < _fontDescriptors.size()) {
</span><span class="cx"> if ((fontDescriptor = _fontDescriptors[index].get()))
</span></span></pre>
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