content: /*
   * Copyright (C) 2015 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.
   */
  
  import java.util.TreeMap;
  
  public class Main {
    private static TreeMap treeMap = new TreeMap();
  
    public static void main(String[] args) {
      System.loadLibrary(args[0]);
      testHomogeneousCompaction();
      testCollectorTransitions();
      System.out.println("Done.");
    }
  
    private static void allocateStuff() {
      for (int i = 0; i < 1000; ++i) {
        Object o = new Object();
        treeMap.put(o.hashCode(), o);
      }
    }
  
    public static void testHomogeneousCompaction() {
      System.out.println("Attempting homogeneous compaction");
      final boolean supportHSC = supportHomogeneousSpaceCompact();
      Object o = new Object();
      long addressBefore = objectAddress(o);
      long addressAfter;
      allocateStuff();
      final boolean success = performHomogeneousSpaceCompact();
      allocateStuff();
      System.out.println("Homogeneous compaction support=" + supportHSC + " success=" + success);
      if (supportHSC != success) {
        System.out.println("error: Expected " + supportHSC + " but got " + success);
      }
      if (success) {
        allocateStuff();
        addressAfter = objectAddress(o);
        // This relies on the compaction copying from one space to another space and there being no
        // overlap.
        if (addressBefore == addressAfter) {
          System.out.println("error: Expected different adddress " + addressBefore + " vs " +
              addressAfter);
        }
      }
      if (supportHSC) {
        incrementDisableMovingGC();
        if (performHomogeneousSpaceCompact()) {
          System.out.println("error: Compaction succeeded when moving GC is disabled");
        }
        decrementDisableMovingGC();
        if (!performHomogeneousSpaceCompact()) {
          System.out.println("error: Compaction failed when moving GC is enabled");
        }
      }
    }
  
    private static void testCollectorTransitions() {
      if (supportCollectorTransition()) {
        Object o = new Object();
        // Transition to semi-space collector.
        allocateStuff();
        transitionToSS();
        allocateStuff();
        long addressBefore = objectAddress(o);
        Runtime.getRuntime().gc();
        long addressAfter = objectAddress(o);
        if (addressBefore == addressAfter) {
          System.out.println("error: Expected different adddress " + addressBefore + " vs " +
              addressAfter);
        }
        // Transition back to CMS.
        transitionToCMS();
        allocateStuff();
        addressBefore = objectAddress(o);
        Runtime.getRuntime().gc();
        addressAfter = objectAddress(o);
        if (addressBefore != addressAfter) {
          System.out.println("error: Expected same adddress " + addressBefore + " vs " +
              addressAfter);
        }
      }
    }
  
    // Methods to get access to ART internals.
    private static native boolean supportHomogeneousSpaceCompact();
    private static native boolean performHomogeneousSpaceCompact();
    private static native void incrementDisableMovingGC();
    private static native void decrementDisableMovingGC();
    private static native long objectAddress(Object object);
    private static native boolean supportCollectorTransition();
    private static native void transitionToSS();
    private static native void transitionToCMS();
  }
  