1 /* 2 * Copyright 2021 Code Intelligence GmbH 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <jni.h> 20 #include <stdint.h> 21 22 #include <string> 23 24 namespace jazzer { 25 26 // The members of this struct are only accessed by libFuzzer. 27 struct __attribute__((packed)) PCTableEntry { 28 [[maybe_unused]] uintptr_t PC, PCFlags; 29 }; 30 31 // CoverageTracker registers an array of 8-bit coverage counters with 32 // libFuzzer. The array is populated from Java using Unsafe. 33 class CoverageTracker { 34 private: 35 static uint8_t *counters_; 36 static PCTableEntry *pc_entries_; 37 38 public: 39 static void Initialize(JNIEnv &env, jlong counters); 40 static void RegisterNewCounters(JNIEnv &env, jint old_num_counters, 41 jint new_num_counters); 42 }; 43 } // namespace jazzer 44