content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * 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 art;
  
  import java.lang.reflect.Field;
  import java.util.Arrays;
  
  public class Test920 {
    public static void run() throws Exception {
      doTest();
    }
  
    public static void doTest() throws Exception {
      testObjectSize(new Object());
      testObjectSize(new Object());
  
      testObjectSize(new int[0]);
      testObjectSize(new int[1]);
      testObjectSize(new int[2]);
  
      testObjectSize(new double[0]);
      testObjectSize(new double[1]);
      testObjectSize(new double[2]);
  
      testObjectSize(new String("abc"));
      testObjectSize(new String("wxyz"));
  
      testObjectHash();
    }
  
    private static void testObjectSize(Object o) {
      System.out.println(o.getClass() + " " + getObjectSize(o));
    }
  
    private static void testObjectHash() {
      Object[] objects = new Object[] {
          new Object(),
          new Object(),
  
          new MyHash(1),
          new MyHash(1),
          new MyHash(2)
      };
  
      int hashes[] = new int[objects.length];
  
      for (int i = 0; i < objects.length; i++) {
        hashes[i] = getObjectHashCode(objects[i]);
      }
  
      // Implementation detail: we use the identity hashcode, for simplicity.
      for (int i = 0; i < objects.length; i++) {
        int ihash = System.identityHashCode(objects[i]);
        if (hashes[i] != ihash) {
          throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + ihash);
        }
      }
  
      Runtime.getRuntime().gc();
      Runtime.getRuntime().gc();
  
      for (int i = 0; i < objects.length; i++) {
        int newhash = getObjectHashCode(objects[i]);
        if (hashes[i] != newhash) {
          throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + newhash);
        }
      }
    }
  
    private static native long getObjectSize(Object o);
    private static native int getObjectHashCode(Object o);
  
    private static class MyHash {
      private int hash;
  
      public MyHash(int h) {
        hash = h;
      }
  
      public int hashCode() {
        return hash;
      }
    }
  }
  