content: /*
   * Copyright (C) 2017 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.util.Arrays;
  
  public class Frames {
    public static void doTest() throws Exception {
      doTestSameThread();
  
      System.out.println();
  
      doTestOtherThreadWait();
  
      System.out.println();
  
      doTestOtherThreadBusyLoop();
    }
  
    public static void doTestSameThread() {
      System.out.println("###################");
      System.out.println("### Same thread ###");
      System.out.println("###################");
  
      Thread t = Thread.currentThread();
  
      int count = getFrameCount(t);
      System.out.println(count);
      try {
        System.out.println(Arrays.toString(getFrameLocation(t, -1)));
      } catch (RuntimeException e) {
        System.out.println(e.getMessage());
      }
      for (int i = 0; i < count; i++) {
        System.out.println(Arrays.toString(getFrameLocation(t, i)));
      }
      try {
        System.out.println(Arrays.toString(getFrameLocation(t, count)));
      } catch (RuntimeException e) {
        System.out.println(e.getMessage());
      }
    }
  
    public static void doTestOtherThreadWait() throws Exception {
      System.out.println("################################");
      System.out.println("### Other thread (suspended) ###");
      System.out.println("################################");
      final ControlData data = new ControlData();
      data.waitFor = new Object();
      Thread t = new Thread("Frames doTestOtherThreadWait") {
        public void run() {
          Recurse.foo(4, 0, 0, data);
        }
      };
      t.start();
      data.reached.await();
      Thread.yield();
      Thread.sleep(500);  // A little bit of time...
  
      int count = getFrameCount(t);
      System.out.println(count);
      try {
        System.out.println(Arrays.toString(getFrameLocation(t, -1)));
      } catch (RuntimeException e) {
        System.out.println(e.getMessage());
      }
      for (int i = 0; i < count; i++) {
        System.out.println(Arrays.toString(getFrameLocation(t, i)));
      }
      try {
        System.out.println(Arrays.toString(getFrameLocation(t, count)));
      } catch (RuntimeException e) {
        System.out.println(e.getMessage());
      }
  
      // Let the thread make progress and die.
      synchronized(data.waitFor) {
        data.waitFor.notifyAll();
      }
      t.join();
    }
  
    public static void doTestOtherThreadBusyLoop() throws Exception {
      System.out.println("###########################");
      System.out.println("### Other thread (live) ###");
      System.out.println("###########################");
      final ControlData data = new ControlData();
      Thread t = new Thread("Frames doTestOtherThreadBusyLoop") {
        public void run() {
          Recurse.foo(4, 0, 0, data);
        }
      };
      t.start();
      data.reached.await();
      Thread.yield();
      Thread.sleep(500);  // A little bit of time...
  
      int count = getFrameCount(t);
      System.out.println(count);
      try {
        System.out.println(Arrays.toString(getFrameLocation(t, -1)));
      } catch (RuntimeException e) {
        System.out.println(e.getMessage());
      }
      for (int i = 0; i < count; i++) {
        System.out.println(Arrays.toString(getFrameLocation(t, i)));
      }
      try {
        System.out.println(Arrays.toString(getFrameLocation(t, count)));
      } catch (RuntimeException e) {
        System.out.println(e.getMessage());
      }
  
      // Let the thread stop looping and die.
      data.stop = true;
      t.join();
    }
  
    public static native int getFrameCount(Thread thread);
    public static native Object[] getFrameLocation(Thread thread, int depth);
  }
  