chore: add global MutationRuntime

For now it only stores the fuzz test method

Author: oetr

src/main/java/com/code_intelligence/jazzer/mutation/ArgumentsMutator.java

@@ -30,6 +30,7 @@
 import com.code_intelligence.jazzer.mutation.combinator.MutatorCombinators;
 import com.code_intelligence.jazzer.mutation.engine.SeededPseudoRandom;
 import com.code_intelligence.jazzer.mutation.mutator.Mutators;
+import com.code_intelligence.jazzer.mutation.runtime.MutationRuntime;
 import com.code_intelligence.jazzer.mutation.support.Preconditions;
 import com.code_intelligence.jazzer.utils.Log;
 import java.io.ByteArrayInputStream;
@@ -97,6 +98,8 @@ public static Optional<ArgumentsMutator> forMethod(
       Log.error(validationError.getMessage());
       throw validationError;
     }
+    MutationRuntime.fuzzTestMethod = method;
+    DictionaryProvider[] typeDictionaries = method.getAnnotationsByType(DictionaryProvider.class);
     return toArrayOrEmpty(
             stream(method.getAnnotatedParameterTypes())
                 .map(

src/main/java/com/code_intelligence/jazzer/mutation/BUILD.bazel

@@ -11,6 +11,7 @@ java_library(
         "//src/main/java/com/code_intelligence/jazzer/mutation/combinator",
         "//src/main/java/com/code_intelligence/jazzer/mutation/engine",
         "//src/main/java/com/code_intelligence/jazzer/mutation/mutator",
+        "//src/main/java/com/code_intelligence/jazzer/mutation/runtime",
         "//src/main/java/com/code_intelligence/jazzer/mutation/support",
         "//src/main/java/com/code_intelligence/jazzer/utils:log",
     ],

src/main/java/com/code_intelligence/jazzer/mutation/runtime/BUILD.bazel

@@ -0,0 +1,11 @@
+java_library(
+    name = "runtime",
+    srcs = glob(["*.java"]),
+    visibility = [
+        "//selffuzz/src/test/java/com/code_intelligence/selffuzz/mutation/mutator/lang:__pkg__",
+        "//src/main/java/com/code_intelligence/jazzer/mutation:__pkg__",
+        "//src/main/java/com/code_intelligence/jazzer/mutation:__subpackages__",
+        "//src/test/java/com/code_intelligence/jazzer/mutation:__pkg__",
+        "//src/test/java/com/code_intelligence/jazzer/mutation:__subpackages__",
+    ],
+)

src/main/java/com/code_intelligence/jazzer/mutation/runtime/MutationRuntime.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2024 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.mutation.runtime;
+
+import java.lang.reflect.Method;
+
+/** Runtime information to be used by mutators. */
+public class MutationRuntime {
+  /** The fuzz test method currently being executed. */
+  public static Method fuzzTestMethod;
+}