infer_clone/infer/tests/codetoanalyze/java/bufferoverrun/InheritanceTest.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.
 */

class InheritanceTest {
  interface MyInterface {
    public int foo();
  }

  class UniqueImpl implements MyInterface {
    public int foo() {
      return 5;
    }
  }

  public void call_interface_method_Good_FP(MyInterface x) {
    int a[] = new int[10];
    a[x.foo()] = 0;
  }

  public void call_interface_method_Bad(MyInterface x) {
    int a[] = new int[5];
    a[x.foo()] = 0;
  }

  interface MyInterface2 {
    public int foo();
  }

  abstract class AbsImpl implements MyInterface2 {
    public abstract int foo();
  }

  class Impl1 extends AbsImpl {
    @Override
    public int foo() {
      return 10;
    }
  }

  class Impl2 extends AbsImpl {
    @Override
    public int foo() {
      return 5;
    }
  }

  /* By heuristics, [Impl1.foo] is selected. It is hard to say good or bad. */
  public void call_interface_method2(MyInterface2 x) {
    int a[] = new int[10];
    a[x.foo()] = 0;
  }
}