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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
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