agent/src/main/java/com/code_intelligence/jazzer/runtime/CoverageMap.java


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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.

package com.code_intelligence.jazzer.runtime;

import java.nio.ByteBuffer;

/**
 * Represents the Java view on a libFuzzer 8 bit counter coverage map.
 * By using a direct ByteBuffer, the counter array is shared directly with
 * native code.
 */
final public class CoverageMap {
  public static ByteBuffer mem = ByteBuffer.allocateDirect(0);

  public static void enlargeCoverageMap() {
    registerNewCoverageCounters();
    System.out.println("INFO: New number of inline 8-bit counters: " + mem.capacity());
  }

  private static native void registerNewCoverageCounters();
}