1 files changed, 34 insertions, 0 deletions
diff --git a/src/main/java/com/code_intelligence/jazzer/runtime/Mutator.java b/src/main/java/com/code_intelligence/jazzer/runtime/Mutator.java
new file mode 100644
index 00000000..2d9a7f65
--- /dev/null
+++ b/src/main/java/com/code_intelligence/jazzer/runtime/Mutator.java
@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+
+package com.code_intelligence.jazzer.runtime;
+
+import com.github.fmeum.rules_jni.RulesJni;
+
+public final class Mutator {
+  public static final boolean SHOULD_MOCK =
+      Boolean.parseBoolean(System.getenv("JAZZER_MOCK_LIBFUZZER_MUTATOR"));
+
+  static {
+    if (!SHOULD_MOCK) {
+      RulesJni.loadLibrary("jazzer_driver", "/com/code_intelligence/jazzer/driver");
+    }
+  }
+
+  public static native int defaultMutateNative(byte[] buffer, int size);
+
+  private Mutator() {}
+}