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<title>[162752] trunk/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/162752">162752</a></dd>
<dt>Author</dt> <dd>mark.lam@apple.com</dd>
<dt>Date</dt> <dd>2014-01-24 19:15:13 -0800 (Fri, 24 Jan 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>DebuggerCallFrame::evaluateWithCallFrame() should not execute a null executable.
<https://webkit.org/b/127600>
Reviewed by Oliver Hunt.
In DebuggerCallFrame::evaluateWithCallFrame(), if the script string that
is passed in is bad, it will fail to create an Executable i.e.
EvalExecutable::create() returns a null pointer. However,
DebuggerCallFrame::evaluateWithCallFrame() was just clearing the
exception and proceeded to execute the null pointer as an Executable.
A crash ensues.
Now, if an exception is detected while creating the Executable, we
abort instead.
* debugger/DebuggerCallFrame.cpp:
(JSC::DebuggerCallFrame::evaluateWithCallFrame):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoredebuggerDebuggerCallFramecpp">trunk/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (162751 => 162752)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2014-01-25 03:00:54 UTC (rev 162751)
+++ trunk/Source/JavaScriptCore/ChangeLog 2014-01-25 03:15:13 UTC (rev 162752)
</span><span class="lines">@@ -1,3 +1,23 @@
</span><ins>+2014-01-24 Mark Lam <mark.lam@apple.com>
+
+ DebuggerCallFrame::evaluateWithCallFrame() should not execute a null executable.
+ <https://webkit.org/b/127600>
+
+ Reviewed by Oliver Hunt.
+
+ In DebuggerCallFrame::evaluateWithCallFrame(), if the script string that
+ is passed in is bad, it will fail to create an Executable i.e.
+ EvalExecutable::create() returns a null pointer. However,
+ DebuggerCallFrame::evaluateWithCallFrame() was just clearing the
+ exception and proceeded to execute the null pointer as an Executable.
+ A crash ensues.
+
+ Now, if an exception is detected while creating the Executable, we
+ abort instead.
+
+ * debugger/DebuggerCallFrame.cpp:
+ (JSC::DebuggerCallFrame::evaluateWithCallFrame):
+
</ins><span class="cx"> 2014-01-24 Oliver Hunt <oliver@apple.com>
</span><span class="cx">
</span><span class="cx"> Put functions need to take a base object and a this value, and perform type checks on |this|
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredebuggerDebuggerCallFramecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp (162751 => 162752)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp 2014-01-25 03:00:54 UTC (rev 162751)
+++ trunk/Source/JavaScriptCore/debugger/DebuggerCallFrame.cpp 2014-01-25 03:15:13 UTC (rev 162752)
</span><span class="lines">@@ -154,6 +154,7 @@
</span><span class="cx"> if (vm.exception()) {
</span><span class="cx"> exception = vm.exception();
</span><span class="cx"> vm.clearException();
</span><ins>+ return jsUndefined();
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> JSValue thisValue = thisValueForCallFrame(callFrame);
</span></span></pre>
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