infer_clone/infer/tests/codetoanalyze/java/starvation-dedup/Dedup.java

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import android.support.annotation.UiThread;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

class Dedup {
  CountDownLatch latch;
  Future future;

  // only one report should be seen
  @UiThread
  void onUiThreadBad() throws InterruptedException, ExecutionException {
    callMethodWithMultipleBlocksBad();
  }

  // three reports are expected
  @UiThread
  void callMethodWithMultipleBlocksBad() throws InterruptedException, ExecutionException {
    future.get();
    latch.await();
    future.get();
  }

  Object lockA, lockB;

  // deadlock should be reported between oneWayBad and anotherWayBad only
  void oneWayBad() {
    synchronized (lockA) {
      synchronized (lockB) {
      }
    }
  }

  void anotherWayBad() {
    synchronized (lockB) {
      synchronized (lockA) {
      }
    }
  }

  // this is creating a longer trace than anotherWayBad, so should be suppressed
  void thirdLongerWayBad() {
    anotherWayBad();
  }
}