/*
 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2020, NTT DATA.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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/**
 * @test
 * @summary Verifies JVMTI GetThreadListStackTraces API with thread_count = 1
 * @library /test/lib
 * @run main/othervm/native -agentlib:OneGetThreadListStackTraces OneGetThreadListStackTraces
 *
 */

public class OneGetThreadListStackTraces implements Runnable {

    private Object lock;

    public OneGetThreadListStackTraces(Object lock) {
        this.lock = lock;
    }

    private static native void checkCallStacks(Thread thread);

    @Override
    public void run() {
      try {
          synchronized (lock) {
              lock.wait();
              System.out.println("OK");
          }
      } catch (Exception e) {
          throw new RuntimeException(e);
      }
    }

    public static void main(String[] args) throws Exception {
        Object lockObj = new Object();
        Thread th = new Thread(new OneGetThreadListStackTraces(lockObj), "test thread");
        th.start();

        /* Wait until the thread state transits to "waiting" */
        while (th.getState() != Thread.State.WAITING) {
            Thread.onSpinWait();
        }

        checkCallStacks(th);

        synchronized (lockObj) {
            lockObj.notify();
        }
    }
}