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/*******************************************************************************
* Copyright (c) 2016 Andrey Loskutov.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Andrey Loskutov <loskutov@gmx.de> - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.tests.launching;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.ConcurrentModificationException;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.core.ILaunchManager;
import org.eclipse.debug.core.Launch;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.core.model.IDisconnect;
import org.eclipse.debug.core.model.IProcess;
/**
* Tests for the {@link Launch} class
*
* @since 3.10
*/
public class LaunchTests extends AbstractLaunchTest {
private InvocationHandler handler;
private Runnable readIsTerminatedTask;
private Runnable readIsDisconnectedTask;
private Runnable writeProcessesTask;
private Runnable writeDebugTargetsTask;
/**
* Constructor
* @param name
*/
public LaunchTests(String name) {
super(name);
}
@Override
protected void setUp() throws Exception {
super.setUp();
final Launch launch = new Launch(null, ILaunchManager.RUN_MODE, null);
handler = new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
String name = method.getName();
if (name.equals("equals")) { //$NON-NLS-1$
return args.length == 1 && proxy == args[0];
}
return Boolean.TRUE;
}
};
readIsTerminatedTask = new Runnable() {
@Override
public void run() {
launch.isTerminated();
}
};
readIsDisconnectedTask = new Runnable() {
@Override
public void run() {
launch.isDisconnected();
}
};
writeProcessesTask = new Runnable() {
@Override
public void run() {
IProcess process = createProcessProxy();
launch.addProcess(process);
launch.removeProcess(process);
try {
Thread.sleep(0, 1);
} catch (InterruptedException e) {
//
}
launch.addProcess(process);
launch.removeProcess(process);
}
};
writeDebugTargetsTask = new Runnable() {
@Override
public void run() {
IDebugTarget target2 = createDebugTargetProxy();
launch.addDebugTarget(target2);
launch.removeDebugTarget(target2);
try {
Thread.sleep(0, 1);
} catch (InterruptedException e) {
//
}
launch.addDebugTarget(target2);
launch.removeDebugTarget(target2);
}
};
}
@Override
protected void tearDown() throws Exception {
super.tearDown();
}
/**
* Modifies debug targets and checks if this causes
* {@link ConcurrentModificationException} in the another thread
*/
public void testTerminatedAndWriteTargets() throws Exception {
assertTrue(testExecution(readIsTerminatedTask, writeDebugTargetsTask));
}
public void testDisconnectedAndWriteTargets() throws Exception {
assertTrue(testExecution(readIsDisconnectedTask, writeDebugTargetsTask));
}
/**
* Modifies processes and checks if this causes
* {@link ConcurrentModificationException} in the another thread
*/
public void testTerminatedAndWriteProcesses() throws Exception {
assertTrue(testExecution(readIsTerminatedTask, writeProcessesTask));
}
/**
* Modifies processes and checks if this causes
* {@link ConcurrentModificationException} in the another thread
*/
public void testDisconnectedAndWriteProcesses() throws Exception {
assertTrue(testExecution(readIsDisconnectedTask, writeProcessesTask));
}
private boolean testExecution(final Runnable readTask, final Runnable writeTask) {
/*
* Normally 10 times trial is sufficient to reproduce concurrent
* modification error, but 2000 is chosen for better stability of test.
* (the test execution time is less than 2 sec)
*/
final int maxTrialCount = 2000;
final Semaphore semaphore = new Semaphore(0);
final AtomicInteger runs = new AtomicInteger();
Job job = new Job("modify debug target") { //$NON-NLS-1$
@Override
protected IStatus run(IProgressMonitor monitor) {
try {
semaphore.acquire();
for (int i = 0; i < maxTrialCount; i++) {
if (monitor.isCanceled()) {
return Status.CANCEL_STATUS;
}
// try to modify launch data
writeTask.run();
}
} catch (Exception e1) {
// we don't care
return Status.CANCEL_STATUS;
} finally {
runs.set(maxTrialCount);
}
return Status.OK_STATUS;
}
};
job.schedule();
semaphore.release();
try {
while (runs.get() < maxTrialCount) {
// try to read launch data
readTask.run();
// avoid endless loop if job already finished
if (job.getResult() != null) {
break;
}
}
} finally {
System.out.println(getName() + " runs: " + runs); //$NON-NLS-1$
job.cancel();
}
assertEquals(maxTrialCount, runs.get());
return true;
}
private IDebugTarget createDebugTargetProxy() {
IDebugTarget debugTarget = (IDebugTarget) Proxy.newProxyInstance(LaunchTests.class.getClassLoader(), new Class[] {
IDebugTarget.class }, handler);
return debugTarget;
}
private IProcess createProcessProxy() {
IProcess process = (IProcess) Proxy.newProxyInstance(LaunchTests.class.getClassLoader(), new Class[] {
IProcess.class, IDisconnect.class }, handler);
return process;
}
}
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