1 files changed, 31 insertions, 0 deletions
diff --git a/src/main/native/com/code_intelligence/jazzer/driver/mutator.cpp b/src/main/native/com/code_intelligence/jazzer/driver/mutator.cpp
new file mode 100644
index 00000000..4e21612b
--- /dev/null
+++ b/src/main/native/com/code_intelligence/jazzer/driver/mutator.cpp
@@ -0,0 +1,31 @@
+// Copyright 2023 Code Intelligence GmbH
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstddef>
+#include <cstdint>
+
+#include "com_code_intelligence_jazzer_runtime_Mutator.h"
+
+extern "C" size_t LLVMFuzzerMutate(uint8_t *Data, size_t Size, size_t MaxSize);
+
+[[maybe_unused]] jint
+Java_com_code_1intelligence_jazzer_runtime_Mutator_defaultMutateNative(
+    JNIEnv *env, jclass, jbyteArray jni_data, jint size) {
+  jint maxSize = env->GetArrayLength(jni_data);
+  uint8_t *data =
+      static_cast<uint8_t *>(env->GetPrimitiveArrayCritical(jni_data, nullptr));
+  jint res = LLVMFuzzerMutate(data, size, maxSize);
+  env->ReleasePrimitiveArrayCritical(jni_data, data, 0);
+  return res;
+}