jdk-24/test/jdk/java/lang/Thread/virtual/TracePinnedThreads.java
Alan Bateman 9583e3657e 8284161: Implementation of Virtual Threads (Preview)
Co-authored-by: Ron Pressler <rpressler@openjdk.org>
Co-authored-by: Alan Bateman <alanb@openjdk.org>
Co-authored-by: Erik Österlund <eosterlund@openjdk.org>
Co-authored-by: Andrew Haley <aph@openjdk.org>
Co-authored-by: Rickard Bäckman <rbackman@openjdk.org>
Co-authored-by: Markus Grönlund <mgronlun@openjdk.org>
Co-authored-by: Leonid Mesnik <lmesnik@openjdk.org>
Co-authored-by: Serguei Spitsyn <sspitsyn@openjdk.org>
Co-authored-by: Chris Plummer <cjplummer@openjdk.org>
Co-authored-by: Coleen Phillimore <coleenp@openjdk.org>
Co-authored-by: Robbin Ehn <rehn@openjdk.org>
Co-authored-by: Stefan Karlsson <stefank@openjdk.org>
Co-authored-by: Thomas Schatzl <tschatzl@openjdk.org>
Co-authored-by: Sergey Kuksenko <skuksenko@openjdk.org>
Reviewed-by: lancea, eosterlund, rehn, sspitsyn, stefank, tschatzl, dfuchs, lmesnik, dcubed, kevinw, amenkov, dlong, mchung, psandoz, bpb, coleenp, smarks, egahlin, mseledtsov, coffeys, darcy
2022-05-07 08:06:16 +00:00

66 lines
2.4 KiB
Java

/*
* Copyright (c) 2020, 2022, Oracle and/or its affiliates. All rights reserved.
* 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 Basic test of debugging option to trace pinned threads
* @compile --enable-preview -source ${jdk.version} TracePinnedThreads.java
* @run main/othervm --enable-preview -Djdk.tracePinnedThreads=full TracePinnedThreads
* @run main/othervm --enable-preview -Djdk.tracePinnedThreads=short TracePinnedThreads
*/
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.time.Duration;
import java.util.concurrent.locks.LockSupport;
public class TracePinnedThreads {
static final Object lock = new Object();
public static void main(String[] args) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream original = System.out;
System.setOut(new PrintStream(baos));
try {
Thread.ofVirtual().start(() -> {
synchronized (lock) {
long nanos = Duration.ofSeconds(1).toNanos();
LockSupport.parkNanos(nanos);
}
}).join();
System.out.flush();
} finally {
System.setOut(original);
}
String output = new String(baos.toByteArray()); // default charset
System.out.println(output);
String expected = "<== monitors:1";
if (!output.contains(expected)) {
throw new RuntimeException("expected: \"" + expected + "\"");
}
}
}