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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/177089">177089</a></dd>
<dt>Author</dt> <dd>antti@apple.com</dd>
<dt>Date</dt> <dd>2014-12-10 12:46:15 -0800 (Wed, 10 Dec 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>Crash when creating CSSCalcBinaryOperation
https://bugs.webkit.org/show_bug.cgi?id=134886
rdar://problem/17663561

Reviewed by Chris Dumez.

Source/WebCore:

Test: fast/css/calc-binary-operation-crash.html

* css/CSSCalculationValue.cpp:
(WebCore::determineCategory):

Ensure that both axis are within the addSubtractResult table.
Remove unneeded CalcOther test. The call site guarantees it doesn't happen and the normal cases would handle it anyway.
Also strengthen some asserts.

LayoutTests:

* fast/css/calc-binary-operation-crash-expected.txt: Added.
* fast/css/calc-binary-operation-crash.html: Added.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorecssCSSCalculationValuecpp">trunk/Source/WebCore/css/CSSCalculationValue.cpp</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastcsscalcbinaryoperationcrashexpectedtxt">trunk/LayoutTests/fast/css/calc-binary-operation-crash-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastcsscalcbinaryoperationcrashhtml">trunk/LayoutTests/fast/css/calc-binary-operation-crash.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (177088 => 177089)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2014-12-10 20:43:18 UTC (rev 177088)
+++ trunk/LayoutTests/ChangeLog        2014-12-10 20:46:15 UTC (rev 177089)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2014-12-10  Antti Koivisto  &lt;antti@apple.com&gt;
+
+        Crash when creating CSSCalcBinaryOperation
+        https://bugs.webkit.org/show_bug.cgi?id=134886
+        rdar://problem/17663561
+
+        Reviewed by Chris Dumez.
+
+        * fast/css/calc-binary-operation-crash-expected.txt: Added.
+        * fast/css/calc-binary-operation-crash.html: Added.
+
</ins><span class="cx"> 2014-12-10  Joanmarie Diggs  &lt;jdiggs@igalia.com&gt;
</span><span class="cx"> 
</span><span class="cx">         AX: [ATK] MathML tokens with text fail to expose their text content via AtkText
</span></span></pre></div>
<a id="trunkLayoutTestsfastcsscalcbinaryoperationcrashexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/calc-binary-operation-crash-expected.txt (0 => 177089)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/calc-binary-operation-crash-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/css/calc-binary-operation-crash-expected.txt        2014-12-10 20:46:15 UTC (rev 177089)
</span><span class="lines">@@ -0,0 +1,3 @@
</span><ins>+This test passes if it doesn't crash.
+
+X
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcsscalcbinaryoperationcrashhtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/calc-binary-operation-crash.html (0 => 177089)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/calc-binary-operation-crash.html                                (rev 0)
+++ trunk/LayoutTests/fast/css/calc-binary-operation-crash.html        2014-12-10 20:46:15 UTC (rev 177089)
</span><span class="lines">@@ -0,0 +1,6 @@
</span><ins>+&lt;script&gt;
+if (window.testRunner)
+    testRunner.dumpAsText();
+&lt;/script&gt;
+&lt;p&gt;This test passes if it doesn't crash.&lt;/p&gt;
+&lt;p style=&quot;text-indent: calc(25s - 3px + 12.5%*2)&quot;&gt;X&lt;/p&gt;
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (177088 => 177089)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-12-10 20:43:18 UTC (rev 177088)
+++ trunk/Source/WebCore/ChangeLog        2014-12-10 20:46:15 UTC (rev 177089)
</span><span class="lines">@@ -1,3 +1,20 @@
</span><ins>+2014-12-10  Antti Koivisto  &lt;antti@apple.com&gt;
+
+        Crash when creating CSSCalcBinaryOperation
+        https://bugs.webkit.org/show_bug.cgi?id=134886
+        rdar://problem/17663561
+
+        Reviewed by Chris Dumez.
+
+        Test: fast/css/calc-binary-operation-crash.html
+
+        * css/CSSCalculationValue.cpp:
+        (WebCore::determineCategory):
+
+        Ensure that both axis are within the addSubtractResult table.
+        Remove unneeded CalcOther test. The call site guarantees it doesn't happen and the normal cases would handle it anyway.
+        Also strengthen some asserts.
+
</ins><span class="cx"> 2014-12-10  Anders Carlsson  &lt;andersca@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Add WebStorageNamespaceProvider::closeLocalStorage
</span></span></pre></div>
<a id="trunkSourceWebCorecssCSSCalculationValuecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/CSSCalculationValue.cpp (177088 => 177089)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/CSSCalculationValue.cpp        2014-12-10 20:43:18 UTC (rev 177088)
+++ trunk/Source/WebCore/css/CSSCalculationValue.cpp        2014-12-10 20:46:15 UTC (rev 177089)
</span><span class="lines">@@ -242,6 +242,7 @@
</span><span class="cx">         case CalcOther:
</span><span class="cx">             ASSERT_NOT_REACHED();
</span><span class="cx">         }
</span><ins>+        ASSERT_NOT_REACHED();
</ins><span class="cx">         return nullptr;
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="lines">@@ -311,14 +312,13 @@
</span><span class="cx"> {
</span><span class="cx">     CalculationCategory leftCategory = leftSide.category();
</span><span class="cx">     CalculationCategory rightCategory = rightSide.category();
</span><ins>+    ASSERT(leftCategory &lt; CalcOther);
+    ASSERT(rightCategory &lt; CalcOther);
</ins><span class="cx"> 
</span><del>-    if (leftCategory == CalcOther || rightCategory == CalcOther)
-        return CalcOther;
-
</del><span class="cx">     switch (op) {
</span><span class="cx">     case CalcAdd:
</span><span class="cx">     case CalcSubtract:
</span><del>-        if (leftCategory &lt; CalcAngle || rightCategory &lt; CalcAngle)
</del><ins>+        if (leftCategory &lt; CalcAngle &amp;&amp; rightCategory &lt; CalcAngle)
</ins><span class="cx">             return addSubtractResult[leftCategory][rightCategory];
</span><span class="cx">         if (leftCategory == rightCategory)
</span><span class="cx">             return leftCategory;
</span><span class="lines">@@ -349,7 +349,8 @@
</span><span class="cx"> public:
</span><span class="cx">     static PassRefPtr&lt;CSSCalcBinaryOperation&gt; create(CalcOperator op, PassRefPtr&lt;CSSCalcExpressionNode&gt; leftSide, PassRefPtr&lt;CSSCalcExpressionNode&gt; rightSide)
</span><span class="cx">     {
</span><del>-        ASSERT(leftSide-&gt;category() != CalcOther &amp;&amp; rightSide-&gt;category() != CalcOther);
</del><ins>+        ASSERT(leftSide-&gt;category() &lt; CalcOther);
+        ASSERT(rightSide-&gt;category() &lt; CalcOther);
</ins><span class="cx"> 
</span><span class="cx">         CalculationCategory newCategory = determineCategory(*leftSide, *rightSide, op);
</span><span class="cx"> 
</span><span class="lines">@@ -363,7 +364,8 @@
</span><span class="cx">     {
</span><span class="cx">         CalculationCategory leftCategory = leftSide-&gt;category();
</span><span class="cx">         CalculationCategory rightCategory = rightSide-&gt;category();
</span><del>-        ASSERT(leftCategory != CalcOther &amp;&amp; rightCategory != CalcOther);
</del><ins>+        ASSERT(leftCategory &lt; CalcOther);
+        ASSERT(rightCategory &lt; CalcOther);
</ins><span class="cx"> 
</span><span class="cx">         bool isInteger = isIntegerResult(op, *leftSide, *rightSide);
</span><span class="cx"> 
</span></span></pre>
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