1 files changed, 53 insertions, 0 deletions
diff --git a/src/test/java/com/code_intelligence/jazzer/instrumentor/MockCoverageMap.java b/src/test/java/com/code_intelligence/jazzer/instrumentor/MockCoverageMap.java
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+++ b/src/test/java/com/code_intelligence/jazzer/instrumentor/MockCoverageMap.java
@@ -0,0 +1,53 @@
+// 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.instrumentor;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+public class MockCoverageMap {
+  public static final int SIZE = 65536;
+  public static final ByteBuffer counters = ByteBuffer.allocate(SIZE);
+
+  private static final ByteBuffer previous_mem = ByteBuffer.allocate(SIZE);
+  public static ArrayList<Integer> locations = new ArrayList<>();
+
+  public static void updated() {
+    int updated_pos = -1;
+    for (int i = 0; i < SIZE; i++) {
+      if (previous_mem.get(i) != counters.get(i)) {
+        updated_pos = i;
+      }
+    }
+    locations.add(updated_pos);
+    System.arraycopy(counters.array(), 0, previous_mem.array(), 0, SIZE);
+  }
+
+  public static void enlargeIfNeeded(int nextId) {
+    // This mock coverage map is statically sized.
+  }
+
+  public static void recordCoverage(int id) {
+    byte counter = counters.get(id);
+    counters.put(id, (byte) (counter == -1 ? 1 : counter + 1));
+  }
+
+  public static void clear() {
+    Arrays.fill(counters.array(), (byte) 0);
+    Arrays.fill(previous_mem.array(), (byte) 0);
+    locations.clear();
+  }
+}