109 lines
3.2 KiB
Java
109 lines
3.2 KiB
Java
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/*
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* Copyright (c) 2023, 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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* @test id=default
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* @summary Do not suspend virtual threads in a critical section.
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* @bug 8311218
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* @requires vm.continuations
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* @library /testlibrary
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* @run main/othervm SuspendWithInterruptLock
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*/
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/**
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* @test id=xint
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* @summary Do not suspend virtual threads in a critical section.
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* @bug 8311218
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* @requires vm.continuations
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* @library /testlibrary
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* @run main/othervm -Xint SuspendWithInterruptLock
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*/
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import jvmti.JVMTIUtils;
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public class SuspendWithInterruptLock {
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static volatile boolean done;
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public static void main(String[] args) throws Exception {
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Thread yielder = Thread.ofVirtual().name("yielder").start(() -> yielder());
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Thread stateReader = Thread.ofVirtual().name("stateReader").start(() -> stateReader(yielder));
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Thread suspender = new Thread(() -> suspender(stateReader));
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suspender.start();
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yielder.join();
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stateReader.join();
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suspender.join();
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}
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static private void yielder() {
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int iterations = 100_000;
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while (iterations-- > 0) {
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Thread.yield();
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}
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done = true;
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}
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static private void stateReader(Thread target) {
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while (!done) {
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target.getState();
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}
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}
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static private void suspender(Thread target) {
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while (!done) {
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suspendThread(target);
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sleep(1);
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resumeThread(target);
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// Allow progress
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sleep(5);
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}
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}
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static void suspendThread(Thread t) {
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try {
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JVMTIUtils.suspendThread(t);
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} catch (JVMTIUtils.JvmtiException e) {
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if (e.getCode() != JVMTIUtils.JVMTI_ERROR_THREAD_NOT_ALIVE) {
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throw e;
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}
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}
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}
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static void resumeThread(Thread t) {
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try {
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JVMTIUtils.resumeThread(t);
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} catch (JVMTIUtils.JvmtiException e) {
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if (e.getCode() != JVMTIUtils.JVMTI_ERROR_THREAD_NOT_ALIVE) {
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throw e;
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}
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}
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}
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static private void sleep(long millis) {
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try {
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Thread.sleep(millis);
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} catch (InterruptedException e) {}
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}
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}
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