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

/*
 * Copyright (c) 2017 - present Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */


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
  }

}