418 lines
15 KiB
Java
418 lines
15 KiB
Java
/*
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* Copyright (c) 2023, 2024, 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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* @bug 8312498
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* @summary Basic test for JVMTI GetThreadState with virtual threads
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* @modules jdk.management
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* @library /test/lib
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* @run junit/othervm/native --enable-native-access=ALL-UNNAMED GetThreadStateTest
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*/
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/*
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* @test id=no-vmcontinuations
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* @requires vm.continuations
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* @modules jdk.management
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* @library /test/lib
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* @run junit/othervm/native -XX:+UnlockExperimentalVMOptions -XX:-VMContinuations --enable-native-access=ALL-UNNAMED GetThreadStateTest
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*/
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import java.util.StringJoiner;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.locks.LockSupport;
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import jdk.test.lib.thread.VThreadRunner; // ensureParallelism requires jdk.management
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import jdk.test.lib.thread.VThreadPinner;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.ValueSource;
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import static org.junit.jupiter.api.Assertions.*;
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class GetThreadStateTest {
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@BeforeAll
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static void setup() {
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System.loadLibrary("GetThreadStateTest");
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init();
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// need >=2 carriers for testing pinning when main thread is a virtual thread
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if (Thread.currentThread().isVirtual()) {
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VThreadRunner.ensureParallelism(2);
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}
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}
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/**
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* Test state of new/unstarted thread.
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*/
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@Test
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void testUnstarted() {
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var thread = Thread.ofVirtual().unstarted(() -> { });
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check(thread, /*new*/ 0);
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}
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/**
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* Test state of terminated thread.
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*/
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@Test
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void testTerminated() throws Exception {
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var thread = Thread.ofVirtual().start(() -> { });
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thread.join();
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check(thread, JVMTI_THREAD_STATE_TERMINATED);
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}
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/**
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* Test state of runnable thread.
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*/
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@Test
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void testRunnable() throws Exception {
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var started = new AtomicBoolean();
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var done = new AtomicBoolean();
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var thread = Thread.ofVirtual().start(() -> {
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started.set(true);
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// spin until done
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while (!done.get()) {
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Thread.onSpinWait();
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}
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});
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try {
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// wait for thread to start execution
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awaitTrue(started);
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// thread should be runnable
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int expected = JVMTI_THREAD_STATE_ALIVE | JVMTI_THREAD_STATE_RUNNABLE;
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check(thread, expected);
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// re-test with interrupt status set
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thread.interrupt();
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check(thread, expected | JVMTI_THREAD_STATE_INTERRUPTED);
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} finally {
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done.set(true);
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thread.join();
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}
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}
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/**
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* Test state of thread waiting to enter a monitor when pinned and not pinned.
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*/
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@ParameterizedTest
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@ValueSource(booleans = { true, false })
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void testMonitorEnter(boolean pinned) throws Exception {
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var ready = new AtomicBoolean();
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Object lock = new Object();
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var thread = Thread.ofVirtual().unstarted(() -> {
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if (pinned) {
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VThreadPinner.runPinned(() -> {
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ready.set(true);
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synchronized (lock) { }
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});
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} else {
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ready.set(true);
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synchronized (lock) { }
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}
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});
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try {
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synchronized (lock) {
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// start thread and wait for it to start execution
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thread.start();
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awaitTrue(ready);
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// thread should block on monitor enter
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int expected = JVMTI_THREAD_STATE_ALIVE | JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER;
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await(thread, expected);
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// re-test with interrupt status set
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thread.interrupt();
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check(thread, expected | JVMTI_THREAD_STATE_INTERRUPTED);
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}
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} finally {
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thread.join();
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}
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}
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/**
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* Test state of thread waiting in Object.wait() when pinned and not pinned.
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*/
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@ParameterizedTest
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@ValueSource(booleans = { true, false })
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void testObjectWait(boolean pinned) throws Exception {
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var ready = new AtomicBoolean();
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Object lock = new Object();
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var thread = Thread.ofVirtual().start(() -> {
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synchronized (lock) {
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try {
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if (pinned) {
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VThreadPinner.runPinned(() -> {
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ready.set(true);
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lock.wait();
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});
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} else {
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ready.set(true);
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lock.wait();
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}
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} catch (InterruptedException e) { }
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}
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});
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try {
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// wait for thread to start execution
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awaitTrue(ready);
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// thread should wait
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int expected = JVMTI_THREAD_STATE_ALIVE |
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JVMTI_THREAD_STATE_WAITING |
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JVMTI_THREAD_STATE_WAITING_INDEFINITELY |
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JVMTI_THREAD_STATE_IN_OBJECT_WAIT;
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await(thread, expected);
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// notify so thread waits to re-enter monitor
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synchronized (lock) {
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lock.notifyAll();
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expected = JVMTI_THREAD_STATE_ALIVE | JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER;
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check(thread, expected);
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// re-test with interrupt status set
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thread.interrupt();
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check(thread, expected | JVMTI_THREAD_STATE_INTERRUPTED);
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}
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} finally {
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thread.interrupt();
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thread.join();
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}
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}
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/**
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* Test state of thread waiting in Object.wait(millis) when pinned and not pinned.
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*/
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@ParameterizedTest
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@ValueSource(booleans = { true, false })
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void testObjectWaitMillis(boolean pinned) throws Exception {
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var ready = new AtomicBoolean();
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Object lock = new Object();
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var thread = Thread.ofVirtual().start(() -> {
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synchronized (lock) {
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synchronized (lock) {
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try {
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if (pinned) {
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VThreadPinner.runPinned(() -> {
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ready.set(true);
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lock.wait(Long.MAX_VALUE);
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});
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} else {
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ready.set(true);
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lock.wait(Long.MAX_VALUE);
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}
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} catch (InterruptedException e) { }
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}
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}
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});
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try {
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// wait for thread to start execution
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awaitTrue(ready);
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// thread should wait
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int expected = JVMTI_THREAD_STATE_ALIVE |
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JVMTI_THREAD_STATE_WAITING |
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JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT |
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JVMTI_THREAD_STATE_IN_OBJECT_WAIT;
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await(thread, expected);
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// notify so thread waits to re-enter monitor
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synchronized (lock) {
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lock.notifyAll();
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expected = JVMTI_THREAD_STATE_ALIVE | JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER;
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check(thread, expected);
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// re-test with interrupt status set
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thread.interrupt();
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check(thread, expected | JVMTI_THREAD_STATE_INTERRUPTED);
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}
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} finally {
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thread.interrupt();
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thread.join();
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}
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}
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/**
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* Test state of thread parked with LockSupport.park when pinned and not pinned.
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*/
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@ParameterizedTest
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@ValueSource(booleans = { true, false })
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void testPark(boolean pinned) throws Exception {
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var ready = new AtomicBoolean();
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var done = new AtomicBoolean();
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var thread = Thread.ofVirtual().start(() -> {
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if (pinned) {
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VThreadPinner.runPinned(() -> {
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ready.set(true);
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while (!done.get()) {
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LockSupport.park();
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}
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});
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} else {
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ready.set(true);
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while (!done.get()) {
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LockSupport.park();
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}
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}
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});
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try {
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// wait for thread to start execution
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awaitTrue(ready);
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// thread should park
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int expected = JVMTI_THREAD_STATE_ALIVE |
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JVMTI_THREAD_STATE_WAITING |
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JVMTI_THREAD_STATE_WAITING_INDEFINITELY |
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JVMTI_THREAD_STATE_PARKED;
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await(thread, expected);
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} finally {
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done.set(true);
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LockSupport.unpark(thread);
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thread.join();
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}
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}
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/**
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* Test state of thread parked with LockSupport.parkNanos when pinned and not pinned.
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*/
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@ParameterizedTest
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@ValueSource(booleans = { true, false })
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void testParkNanos(boolean pinned) throws Exception {
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var ready = new AtomicBoolean();
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var done = new AtomicBoolean();
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var thread = Thread.ofVirtual().start(() -> {
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if (pinned) {
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VThreadPinner.runPinned(() -> {
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ready.set(true);
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while (!done.get()) {
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LockSupport.parkNanos(Long.MAX_VALUE);
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}
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});
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} else {
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ready.set(true);
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while (!done.get()) {
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LockSupport.parkNanos(Long.MAX_VALUE);
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}
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}
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});
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try {
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// wait for thread to start execution
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awaitTrue(ready);
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// thread should park
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int expected = JVMTI_THREAD_STATE_ALIVE |
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JVMTI_THREAD_STATE_WAITING |
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JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT |
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JVMTI_THREAD_STATE_PARKED;
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await(thread, expected);
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} finally {
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done.set(true);
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LockSupport.unpark(thread);
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thread.join();
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}
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}
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/**
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* Waits for the boolean value to become true.
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*/
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private static void awaitTrue(AtomicBoolean ref) throws Exception {
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while (!ref.get()) {
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Thread.sleep(20);
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}
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}
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/**
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* Asserts that the given thread has the expected JVMTI state.
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*/
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private static void check(Thread thread, int expected) {
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System.err.format(" expect state=0x%x (%s) ...%n", expected, jvmtiStateToString(expected));
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int state = jvmtiState(thread);
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System.err.format(" thread state=0x%x (%s)%n", state, jvmtiStateToString(state));
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assertEquals(expected, state);
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}
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/**
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* Waits indefinitely for the given thread to get to the target JVMTI state.
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*/
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private static void await(Thread thread, int targetState) throws Exception {
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System.err.format(" await state=0x%x (%s) ...%n", targetState, jvmtiStateToString(targetState));
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int state = jvmtiState(thread);
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System.err.format(" thread state=0x%x (%s)%n", state, jvmtiStateToString(state));
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while (state != targetState) {
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assertTrue(thread.isAlive(), "Thread has terminated");
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Thread.sleep(20);
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state = jvmtiState(thread);
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System.err.format(" thread state=0x%x (%s)%n", state, jvmtiStateToString(state));
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}
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}
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private static final int JVMTI_THREAD_STATE_ALIVE = 0x0001;
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private static final int JVMTI_THREAD_STATE_TERMINATED = 0x0002;
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private static final int JVMTI_THREAD_STATE_RUNNABLE = 0x0004;
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private static final int JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER = 0x0400;
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private static final int JVMTI_THREAD_STATE_WAITING = 0x0080;
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private static final int JVMTI_THREAD_STATE_WAITING_INDEFINITELY = 0x0010;
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private static final int JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT = 0x0020;
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private static final int JVMTI_THREAD_STATE_SLEEPING = 0x0040;
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private static final int JVMTI_THREAD_STATE_IN_OBJECT_WAIT = 0x0100;
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private static final int JVMTI_THREAD_STATE_PARKED = 0x0200;
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private static final int JVMTI_THREAD_STATE_SUSPENDED = 0x100000;
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private static final int JVMTI_THREAD_STATE_INTERRUPTED = 0x200000;
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private static final int JVMTI_THREAD_STATE_IN_NATIVE = 0x400000;
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private static native void init();
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private static native int jvmtiState(Thread thread);
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private static String jvmtiStateToString(int state) {
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StringJoiner sj = new StringJoiner(" | ");
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if ((state & JVMTI_THREAD_STATE_ALIVE) != 0)
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sj.add("JVMTI_THREAD_STATE_ALIVE");
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if ((state & JVMTI_THREAD_STATE_TERMINATED) != 0)
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sj.add("JVMTI_THREAD_STATE_TERMINATED");
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if ((state & JVMTI_THREAD_STATE_RUNNABLE) != 0)
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sj.add("JVMTI_THREAD_STATE_RUNNABLE");
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if ((state & JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER) != 0)
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sj.add("JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER");
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if ((state & JVMTI_THREAD_STATE_WAITING) != 0)
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sj.add("JVMTI_THREAD_STATE_WAITING");
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if ((state & JVMTI_THREAD_STATE_WAITING_INDEFINITELY) != 0)
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sj.add("JVMTI_THREAD_STATE_WAITING_INDEFINITELY");
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if ((state & JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT) != 0)
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sj.add("JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT");
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if ((state & JVMTI_THREAD_STATE_IN_OBJECT_WAIT) != 0)
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sj.add("JVMTI_THREAD_STATE_IN_OBJECT_WAIT");
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if ((state & JVMTI_THREAD_STATE_PARKED) != 0)
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sj.add("JVMTI_THREAD_STATE_PARKED");
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if ((state & JVMTI_THREAD_STATE_SUSPENDED) != 0)
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sj.add("JVMTI_THREAD_STATE_SUSPENDED");
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if ((state & JVMTI_THREAD_STATE_INTERRUPTED) != 0)
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sj.add("JVMTI_THREAD_STATE_INTERRUPTED");
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if ((state & JVMTI_THREAD_STATE_IN_NATIVE) != 0)
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sj.add("JVMTI_THREAD_STATE_IN_NATIVE");
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String s = sj.toString();
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return s.isEmpty() ? "<empty>" : s;
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}
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}
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