undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
This commit is contained in:
commit
0a580b313d
70422 changed files with 17213626 additions and 0 deletions
487
test/jdk/java/lang/Thread/virtual/Parking.java
Normal file
487
test/jdk/java/lang/Thread/virtual/Parking.java
Normal file
|
|
@ -0,0 +1,487 @@
|
|||
/*
|
||||
* Copyright (c) 2019, 2025, 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 id=default
|
||||
* @summary Test virtual threads using park/unpark
|
||||
* @modules java.base/java.lang:+open jdk.management
|
||||
* @library /test/lib
|
||||
* @run junit/timeout=480 Parking
|
||||
*/
|
||||
|
||||
/*
|
||||
* @test id=Xint
|
||||
* @modules java.base/java.lang:+open jdk.management
|
||||
* @library /test/lib
|
||||
* @run junit/othervm/timeout=480 -Xint Parking
|
||||
*/
|
||||
|
||||
/*
|
||||
* @test id=Xcomp
|
||||
* @modules java.base/java.lang:+open jdk.management
|
||||
* @library /test/lib
|
||||
* @run junit/othervm/timeout=480 -Xcomp Parking
|
||||
*/
|
||||
|
||||
/*
|
||||
* @test id=Xcomp-noTieredCompilation
|
||||
* @modules java.base/java.lang:+open jdk.management
|
||||
* @library /test/lib
|
||||
* @run junit/othervm/timeout=480 -Xcomp -XX:-TieredCompilation Parking
|
||||
*/
|
||||
|
||||
import java.time.Duration;
|
||||
import java.util.concurrent.Executors;
|
||||
import java.util.concurrent.ExecutorService;
|
||||
import java.util.concurrent.CountDownLatch;
|
||||
import java.util.concurrent.ThreadFactory;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
import java.util.concurrent.atomic.AtomicBoolean;
|
||||
import java.util.concurrent.locks.LockSupport;
|
||||
|
||||
import jdk.test.lib.thread.VThreadRunner;
|
||||
import jdk.test.lib.thread.VThreadScheduler;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import org.junit.jupiter.params.ParameterizedTest;
|
||||
import org.junit.jupiter.params.provider.ValueSource;
|
||||
import static org.junit.jupiter.api.Assertions.*;
|
||||
import static org.junit.jupiter.api.Assumptions.*;
|
||||
|
||||
class Parking {
|
||||
static final int MAX_VTHREAD_COUNT = 4 * Runtime.getRuntime().availableProcessors();
|
||||
static final Object lock = new Object();
|
||||
|
||||
/**
|
||||
* Park, unparked by platform thread.
|
||||
*/
|
||||
@Test
|
||||
void testPark1() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(LockSupport::park);
|
||||
Thread.sleep(1000); // give time for virtual thread to park
|
||||
LockSupport.unpark(thread);
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Park, unparked by virtual thread.
|
||||
*/
|
||||
@Test
|
||||
void testPark2() throws Exception {
|
||||
var thread1 = Thread.ofVirtual().start(LockSupport::park);
|
||||
Thread.sleep(1000); // give time for virtual thread to park
|
||||
var thread2 = Thread.ofVirtual().start(() -> LockSupport.unpark(thread1));
|
||||
thread1.join();
|
||||
thread2.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Park while holding monitor, unparked by platform thread.
|
||||
*/
|
||||
@Test
|
||||
void testPark3() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(() -> {
|
||||
synchronized (lock) {
|
||||
LockSupport.park();
|
||||
}
|
||||
});
|
||||
Thread.sleep(1000); // give time for virtual thread to park
|
||||
LockSupport.unpark(thread);
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Park with native frame on stack.
|
||||
*/
|
||||
@Test
|
||||
void testPark4() throws Exception {
|
||||
// not implemented
|
||||
}
|
||||
|
||||
/**
|
||||
* Unpark before park.
|
||||
*/
|
||||
@Test
|
||||
void testPark5() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(() -> {
|
||||
LockSupport.unpark(Thread.currentThread());
|
||||
LockSupport.park();
|
||||
});
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* 2 x unpark before park.
|
||||
*/
|
||||
@Test
|
||||
void testPark6() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(() -> {
|
||||
Thread me = Thread.currentThread();
|
||||
LockSupport.unpark(me);
|
||||
LockSupport.unpark(me);
|
||||
LockSupport.park();
|
||||
LockSupport.park(); // should park
|
||||
});
|
||||
Thread.sleep(1000); // give time for thread to park
|
||||
LockSupport.unpark(thread);
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* 2 x park and unpark by platform thread.
|
||||
*/
|
||||
@Test
|
||||
void testPark7() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(() -> {
|
||||
LockSupport.park();
|
||||
LockSupport.park();
|
||||
});
|
||||
|
||||
Thread.sleep(1000); // give time for thread to park
|
||||
|
||||
// unpark, virtual thread should park again
|
||||
LockSupport.unpark(thread);
|
||||
Thread.sleep(1000);
|
||||
assertTrue(thread.isAlive());
|
||||
|
||||
// let it terminate
|
||||
LockSupport.unpark(thread);
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Park with interrupted status set.
|
||||
*/
|
||||
@Test
|
||||
void testPark8() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
t.interrupt();
|
||||
LockSupport.park();
|
||||
assertTrue(t.isInterrupted());
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Thread interrupt when parked.
|
||||
*/
|
||||
@Test
|
||||
void testPark9() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
scheduleInterrupt(t, 1000);
|
||||
while (!Thread.currentThread().isInterrupted()) {
|
||||
LockSupport.park();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Park while holding monitor and with interrupted status set.
|
||||
*/
|
||||
@Test
|
||||
void testPark10() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
t.interrupt();
|
||||
synchronized (lock) {
|
||||
LockSupport.park();
|
||||
}
|
||||
assertTrue(t.isInterrupted());
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Thread interrupt when parked while holding monitor
|
||||
*/
|
||||
@Test
|
||||
void testPark11() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
scheduleInterrupt(t, 1000);
|
||||
while (!Thread.currentThread().isInterrupted()) {
|
||||
synchronized (lock) {
|
||||
LockSupport.park();
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* parkNanos(-1) completes immediately
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos1() throws Exception {
|
||||
VThreadRunner.run(() -> LockSupport.parkNanos(-1));
|
||||
}
|
||||
|
||||
/**
|
||||
* parkNanos(0) completes immediately
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos2() throws Exception {
|
||||
VThreadRunner.run(() -> LockSupport.parkNanos(0));
|
||||
}
|
||||
|
||||
/**
|
||||
* parkNanos(1000ms) parks thread.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos3() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
// park for 1000ms
|
||||
long nanos = TimeUnit.NANOSECONDS.convert(1000, TimeUnit.MILLISECONDS);
|
||||
long start = System.nanoTime();
|
||||
LockSupport.parkNanos(nanos);
|
||||
|
||||
// check that virtual thread parked for >= 900ms
|
||||
long elapsed = TimeUnit.MILLISECONDS.convert(System.nanoTime() - start,
|
||||
TimeUnit.NANOSECONDS);
|
||||
assertTrue(elapsed >= 900);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Park with parkNanos, unparked by platform thread.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos4() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(() -> {
|
||||
long nanos = TimeUnit.NANOSECONDS.convert(1, TimeUnit.DAYS);
|
||||
LockSupport.parkNanos(nanos);
|
||||
});
|
||||
Thread.sleep(100); // give time for virtual thread to park
|
||||
LockSupport.unpark(thread);
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Park with parkNanos, unparked by virtual thread.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos5() throws Exception {
|
||||
var thread1 = Thread.ofVirtual().start(() -> {
|
||||
long nanos = TimeUnit.NANOSECONDS.convert(1, TimeUnit.DAYS);
|
||||
LockSupport.parkNanos(nanos);
|
||||
});
|
||||
Thread.sleep(100); // give time for virtual thread to park
|
||||
var thread2 = Thread.ofVirtual().start(() -> LockSupport.unpark(thread1));
|
||||
thread1.join();
|
||||
thread2.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Unpark before parkNanos.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos6() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
LockSupport.unpark(Thread.currentThread());
|
||||
long nanos = TimeUnit.NANOSECONDS.convert(1, TimeUnit.DAYS);
|
||||
LockSupport.parkNanos(nanos);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Unpark before parkNanos(0), should consume parking permit.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos7() throws Exception {
|
||||
var thread = Thread.ofVirtual().start(() -> {
|
||||
LockSupport.unpark(Thread.currentThread());
|
||||
LockSupport.parkNanos(0); // should consume parking permit
|
||||
LockSupport.park(); // should block
|
||||
});
|
||||
boolean isAlive = thread.join(Duration.ofSeconds(2));
|
||||
assertTrue(isAlive);
|
||||
LockSupport.unpark(thread);
|
||||
thread.join();
|
||||
}
|
||||
|
||||
/**
|
||||
* Park with parkNanos and interrupted status set.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos8() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
t.interrupt();
|
||||
LockSupport.parkNanos(Duration.ofDays(1).toNanos());
|
||||
assertTrue(t.isInterrupted());
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Thread interrupt when parked in parkNanos.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos9() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
scheduleInterrupt(t, 1000);
|
||||
while (!Thread.currentThread().isInterrupted()) {
|
||||
LockSupport.parkNanos(Duration.ofDays(1).toNanos());
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Park with parkNanos while holding monitor and with interrupted status set.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos10() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
t.interrupt();
|
||||
synchronized (lock) {
|
||||
LockSupport.parkNanos(Duration.ofDays(1).toNanos());
|
||||
}
|
||||
assertTrue(t.isInterrupted());
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Thread interrupt when parked in parkNanos and while holding monitor.
|
||||
*/
|
||||
@Test
|
||||
void testParkNanos11() throws Exception {
|
||||
VThreadRunner.run(() -> {
|
||||
Thread t = Thread.currentThread();
|
||||
scheduleInterrupt(t, 1000);
|
||||
while (!Thread.currentThread().isInterrupted()) {
|
||||
synchronized (lock) {
|
||||
LockSupport.parkNanos(Duration.ofDays(1).toNanos());
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Test that parking while holding a monitor releases the carrier.
|
||||
*/
|
||||
@ParameterizedTest
|
||||
@ValueSource(booleans = { true, false })
|
||||
void testParkWhenHoldingMonitor(boolean reenter) throws Exception {
|
||||
assumeTrue(VThreadScheduler.supportsCustomScheduler(), "No support for custom schedulers");
|
||||
try (ExecutorService scheduler = Executors.newFixedThreadPool(1)) {
|
||||
ThreadFactory factory = VThreadScheduler.virtualThreadFactory(scheduler);
|
||||
|
||||
var lock = new Object();
|
||||
|
||||
// thread enters (and maybe reenters) a monitor and parks
|
||||
var started = new CountDownLatch(1);
|
||||
var vthread1 = factory.newThread(() -> {
|
||||
started.countDown();
|
||||
synchronized (lock) {
|
||||
if (reenter) {
|
||||
synchronized (lock) {
|
||||
LockSupport.park();
|
||||
}
|
||||
} else {
|
||||
LockSupport.park();
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
vthread1.start();
|
||||
try {
|
||||
// wait for thread to start and park
|
||||
started.await();
|
||||
await(vthread1, Thread.State.WAITING);
|
||||
|
||||
// carrier should be released, use it for another thread
|
||||
var executed = new AtomicBoolean();
|
||||
var vthread2 = factory.newThread(() -> {
|
||||
executed.set(true);
|
||||
});
|
||||
vthread2.start();
|
||||
vthread2.join();
|
||||
assertTrue(executed.get());
|
||||
} finally {
|
||||
LockSupport.unpark(vthread1);
|
||||
vthread1.join();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Test lots of virtual threads parked while holding a monitor. If the number of
|
||||
* virtual threads exceeds the number of carrier threads then this test will hang if
|
||||
* parking doesn't release the carrier.
|
||||
*/
|
||||
@Test
|
||||
void testManyParkedWhenHoldingMonitor() throws Exception {
|
||||
Thread[] vthreads = new Thread[MAX_VTHREAD_COUNT];
|
||||
var done = new AtomicBoolean();
|
||||
for (int i = 0; i < MAX_VTHREAD_COUNT; i++) {
|
||||
var lock = new Object();
|
||||
var started = new CountDownLatch(1);
|
||||
var vthread = Thread.ofVirtual().start(() -> {
|
||||
started.countDown();
|
||||
synchronized (lock) {
|
||||
while (!done.get()) {
|
||||
LockSupport.park();
|
||||
}
|
||||
}
|
||||
});
|
||||
// wait for thread to start and park
|
||||
started.await();
|
||||
await(vthread, Thread.State.WAITING);
|
||||
vthreads[i] = vthread;
|
||||
}
|
||||
|
||||
// cleanup
|
||||
done.set(true);
|
||||
for (int i = 0; i < MAX_VTHREAD_COUNT; i++) {
|
||||
var vthread = vthreads[i];
|
||||
LockSupport.unpark(vthread);
|
||||
vthread.join();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Schedule a thread to be interrupted after a delay.
|
||||
*/
|
||||
private static void scheduleInterrupt(Thread thread, long delay) {
|
||||
Runnable interruptTask = () -> {
|
||||
try {
|
||||
Thread.sleep(delay);
|
||||
thread.interrupt();
|
||||
} catch (Exception e) {
|
||||
e.printStackTrace();
|
||||
}
|
||||
};
|
||||
new Thread(interruptTask).start();
|
||||
}
|
||||
|
||||
/**
|
||||
* Waits for the given thread to reach a given state.
|
||||
*/
|
||||
private void await(Thread thread, Thread.State expectedState) throws InterruptedException {
|
||||
Thread.State state = thread.getState();
|
||||
while (state != expectedState) {
|
||||
assertTrue(state != Thread.State.TERMINATED, "Thread has terminated");
|
||||
Thread.sleep(10);
|
||||
state = thread.getState();
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue