infer_clone/infer/tests/codetoanalyze/java/racerd/DeepOwnership.java

/*
 * Copyright (c) 2017-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import com.facebook.infer.annotation.ThreadSafe;

@ThreadSafe
class DeepOwnership {
  DeepOwnership next;
  static DeepOwnership global;

  void globalNotOwnedBad() {
    global.next = null;
  }

  void reassignBaseToGlobalBad() {
    DeepOwnership x = new DeepOwnership();
    x = global;
    x.next = null;
  }

  void FN_reassignPathToGlobalBad() {
    DeepOwnership x = new DeepOwnership();
    x.next = global;
    x.next.next = null;
  }

  void deepIntraOk() {
    DeepOwnership x = new DeepOwnership();
    x.next.next = null; // doesn't warn here
  }

  void deepInterOk() {
    DeepOwnership x = new DeepOwnership();
    deepPrivate(x.next);
  }

  private void deepPrivate(DeepOwnership y) {
    y.next = null;
  }

  DeepOwnership deepFromOwnedThisOk() {
    return new DeepOwnership();
  }

  DeepOwnership arr[];

  DeepOwnership() {
    next.next = null;
    arr[0] = null;
  }

  private void loseOwnershipOfNext() {
    synchronized (this) {
      this.next = global;
    }
  }

  void FN_loseOwnershipInCalleeBad() {
    DeepOwnership x = new DeepOwnership();
    x.next = new DeepOwnership();
    loseOwnershipOfNext();
    x.next.next = null; // doesn't warn here
  }
}