/*
 * 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 <stdint.h>

#include <string>

namespace jazzer {

// The members of this struct are only accessed by libFuzzer.
struct __attribute__((packed)) PCTableEntry {
  [[maybe_unused]] uintptr_t PC, PCFlags;
};

// CoverageTracker registers an array of 8-bit coverage counters with
// libFuzzer. The array is populated from Java using Unsafe.
class CoverageTracker {
 private:
  static uint8_t *counters_;
  static PCTableEntry *pc_entries_;

 public:
  static void Initialize(JNIEnv &env, jlong counters);
  static void RegisterNewCounters(JNIEnv &env, jint old_num_counters,
                                  jint new_num_counters);
};
}  // namespace jazzer