1 files changed, 18 insertions, 0 deletions
diff --git a/security/nss/fuzz/shared.cc b/security/nss/fuzz/shared.cc
new file mode 100644
index 0000000000..47fb21638d
--- /dev/null
+++ b/security/nss/fuzz/shared.cc
@@ -0,0 +1,18 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "shared.h"
+
+size_t CustomMutate(Mutators mutators, uint8_t *data, size_t size,
+                    size_t max_size, unsigned int seed) {
+  std::mt19937 rng(seed);
+  static std::bernoulli_distribution bdist;
+
+  if (bdist(rng)) {
+    std::uniform_int_distribution<size_t> idist(0, mutators.size() - 1);
+    return mutators.at(idist(rng))(data, size, max_size, seed);
+  }
+
+  return LLVMFuzzerMutate(data, size, max_size);
+}