--- /dev/null 2020-06-30 08:37:40.050000000 +0900 +++ new/test/hotspot/jtreg/serviceability/jvmti/GetThreadListStackTraces/OneGetThreadListStackTraces.java 2020-06-30 08:44:32.030000000 +0900 @@ -0,0 +1,71 @@ +/* + * 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. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @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(); + } + } +}