<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - libFuzzer shouldn't disable default mutators when a custom one is defined"
href="https://llvm.org/bugs/show_bug.cgi?id=31583">31583</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>libFuzzer shouldn't disable default mutators when a custom one is defined
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ttaubert@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Currently, libFuzzer disables all default mutators and only the custom mutator,
if one is defined. We're currently applying the patch below to get the default
ones back when building against libFuzzer:
<span class="quote">> diff --git libFuzzer/FuzzerMutate.cpp libFuzzer/FuzzerMutate.cpp
> --- libFuzzer/FuzzerMutate.cpp
> +++ libFuzzer/FuzzerMutate.cpp
> @@ -52,10 +52,9 @@
> DefaultMutators.push_back(
> {&MutationDispatcher::Mutate_AddWordFromTORC, "CMP"});
>
> + Mutators = DefaultMutators;
> if (EF->LLVMFuzzerCustomMutator)
> Mutators.push_back({&MutationDispatcher::Mutate_Custom, "Custom"});
> - else
> - Mutators = DefaultMutators;
>
> if (EF->LLVMFuzzerCustomCrossOver)
> Mutators.push_back(</span ></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>