111 lines
3.5 KiB
Java
111 lines
3.5 KiB
Java
/*
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* Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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/*
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* @test AsyncHandshakeWalkStackTest
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* @library /testlibrary /test/lib
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* @build AsyncHandshakeWalkStackTest
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI AsyncHandshakeWalkStackTest
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*/
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import jdk.test.lib.Asserts;
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import jdk.test.whitebox.WhiteBox;
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public class AsyncHandshakeWalkStackTest {
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public static void main(String... args) throws Exception {
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int iterations = 3;
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if (args.length > 0) {
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iterations = Integer.parseInt(args[0]);
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}
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test(iterations);
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}
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private static void test(int iterations) throws Exception {
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Thread loop_thread = new Thread(() -> run_loop(create_list()));
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Thread alloc_thread = new Thread(() -> run_alloc());
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Thread wait_thread = new Thread(() -> run_wait(new Object() {}));
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loop_thread.start();
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alloc_thread.start();
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wait_thread.start();
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WhiteBox wb = WhiteBox.getWhiteBox();
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for (int i = 0; i < iterations; i++) {
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System.out.println("Iteration " + i);
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System.out.flush();
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Thread.sleep(200);
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wb.asyncHandshakeWalkStack(loop_thread);
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Thread.sleep(200);
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wb.asyncHandshakeWalkStack(alloc_thread);
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Thread.sleep(200);
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wb.asyncHandshakeWalkStack(wait_thread);
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Thread.sleep(200);
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wb.asyncHandshakeWalkStack(Thread.currentThread());
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}
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}
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static class List {
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List next;
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List(List next) {
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this.next = next;
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}
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}
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public static List create_list() {
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List head = new List(null);
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List elem = new List(head);
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List elem2 = new List(elem);
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List elem3 = new List(elem2);
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List elem4 = new List(elem3);
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head.next = elem4;
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return head;
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}
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public static void run_loop(List loop) {
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while (loop.next != null) {
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loop = loop.next;
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}
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}
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public static byte[] array;
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public static void run_alloc() {
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while (true) {
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// Write to public static to ensure the byte array escapes.
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array = new byte[4096];
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}
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}
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public static void run_wait(Object lock) {
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synchronized (lock) {
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try {
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lock.wait();
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} catch (InterruptedException ie) {}
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}
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}
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}
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