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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Callers of JSString::value() should check for exceptions thereafter."
href="https://bugs.webkit.org/show_bug.cgi?id=154346">154346</a>
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<th>Summary</th>
<td>Callers of JSString::value() should check for exceptions thereafter.
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Local Build
</td>
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>mark.lam@apple.com
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<pre>Applying the fix in <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - StringPrototype functions should check for exceptions after calling JSString::value()."
href="show_bug.cgi?id=154340">https://bugs.webkit.org/show_bug.cgi?id=154340</a> project wide for straightforward cases.
JSString::value() can throw an exception if the JS string is a rope and value() needs to resolve the rope but encounters an OutOfMemory error. If value() is not able to resolve the rope, it will return a null string (in addition to throwing the exception). If a caller does not check for exceptions after calling JSString::value(), they may eventually use the returned null string and crash the VM.
The fix is to add all the necessary exception checks, and do the appropriate handling if needed.</pre>
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