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+/*
+ * Copyright 2021 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.
+ */
+
+#pragma once
+
+#include <jni.h>
+
+#include <string>
+#include <vector>
+
+#include "jvm_tooling.h"
+
+namespace jazzer {
+
+enum class RunResult {
+ kOk,
+ kException,
+ kDumpAndContinue,
+};
+
+// Invokes the following static methods in the java fuzz target class:
+// 1. On construction:
+// - `public static void fuzzerInitialize()`
+// OR
+// - `public static void fuzzerInitialize(String[] args)`
+// 2. On every call of Run():
+// - `public static void fuzzerTestOneInput(FuzzedDataProvider data)`
+// OR
+// - `public static void fuzzerTestOneInput(byte[] input)`
+// 3. On destruction:
+// - `public static void fuzzerTearDown()`
+class FuzzTargetRunner : public ExceptionPrinter {
+ private:
+ const JVM &jvm_;
+ jclass jclass_;
+ jmethodID fuzzer_initialize_;
+ jmethodID fuzzer_initialize_with_args_;
+ jmethodID fuzzer_test_one_input_bytes_;
+ jmethodID fuzzer_test_one_input_data_;
+ jmethodID fuzzer_tear_down_;
+ jclass jazzer_;
+ jfieldID last_finding_;
+ std::vector<jlong> ignore_tokens_;
+
+ [[nodiscard]] std::string DetectFuzzTargetClass() const;
+ [[nodiscard]] jthrowable GetFinding() const;
+
+ public:
+ // Initializes the java fuzz target by calling `void fuzzerInitialize(...)`.
+ explicit FuzzTargetRunner(
+ JVM &jvm, const std::vector<std::string> &additional_target_args = {});
+
+ // Calls the fuzz target tear down function. This can be useful to join any
+ // Threads so that the JVM shuts down correctly.
+ virtual ~FuzzTargetRunner();
+
+ // Propagate the fuzzer input to the java fuzz target.
+ RunResult Run(const uint8_t *data, std::size_t size);
+
+ void DumpReproducer(const uint8_t *data, std::size_t size);
+};
+
+} // namespace jazzer