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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/183069">183069</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2015-04-21 11:50:16 -0700 (Tue, 21 Apr 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>REGRESSION (<a href="http://trac.webkit.org/projects/webkit/changeset/182899">r182899</a>): icloud.com crashes
https://bugs.webkit.org/show_bug.cgi?id=143960
Patch by Basile Clement <basile_clement@apple.com> on 2015-04-21
Reviewed by Filip Pizlo.
* runtime/JSFunction.h:
(JSC::JSFunction::allocationStructure):
* tests/stress/dfg-rare-data.js: Added.
(F): Regression test</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeJSFunctionh">trunk/Source/JavaScriptCore/runtime/JSFunction.h</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoretestsstressdfgraredatajs">trunk/Source/JavaScriptCore/tests/stress/dfg-rare-data.js</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (183068 => 183069)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2015-04-21 18:01:15 UTC (rev 183068)
+++ trunk/Source/JavaScriptCore/ChangeLog 2015-04-21 18:50:16 UTC (rev 183069)
</span><span class="lines">@@ -1,3 +1,15 @@
</span><ins>+2015-04-21 Basile Clement <basile_clement@apple.com>
+
+ REGRESSION (r182899): icloud.com crashes
+ https://bugs.webkit.org/show_bug.cgi?id=143960
+
+ Reviewed by Filip Pizlo.
+
+ * runtime/JSFunction.h:
+ (JSC::JSFunction::allocationStructure):
+ * tests/stress/dfg-rare-data.js: Added.
+ (F): Regression test
+
</ins><span class="cx"> 2015-04-21 Michael Saboff <msaboff@apple.com>
</span><span class="cx">
</span><span class="cx"> Crash in JSC::Interpreter::execute
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeJSFunctionh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/JSFunction.h (183068 => 183069)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/JSFunction.h 2015-04-21 18:01:15 UTC (rev 183068)
+++ trunk/Source/JavaScriptCore/runtime/JSFunction.h 2015-04-21 18:50:16 UTC (rev 183069)
</span><span class="lines">@@ -118,7 +118,9 @@
</span><span class="cx">
</span><span class="cx"> Structure* allocationStructure()
</span><span class="cx"> {
</span><del>- ASSERT(m_rareData);
</del><ins>+ if (!m_rareData)
+ return nullptr;
+
</ins><span class="cx"> return m_rareData.get()->allocationStructure();
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestsstressdfgraredatajs"></a>
<div class="addfile"><h4>Added: trunk/Source/JavaScriptCore/tests/stress/dfg-rare-data.js (0 => 183069)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/stress/dfg-rare-data.js (rev 0)
+++ trunk/Source/JavaScriptCore/tests/stress/dfg-rare-data.js 2015-04-21 18:50:16 UTC (rev 183069)
</span><span class="lines">@@ -0,0 +1,9 @@
</span><ins>+function F () { this.inner = 42; };
+
+for (var i = 0; i < 10000; ++i) {
+ var x = new F(false);
+ F.prototype = Object; // Force clearing of the function's rare data
+ var result = x.inner;
+ if (result !== 42)
+ throw "Expected 42, got: " + result;
+}
</ins></span></pre>
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