| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package vogar.target.junit; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.concurrent.atomic.AtomicReference; |
| import org.junit.rules.TestRule; |
| import org.junit.runner.Description; |
| import org.junit.runners.model.Statement; |
| import vogar.util.Threads; |
| |
| /** |
| * Times a test out and then aborts the test run. |
| */ |
| public class TimeoutAndAbortRunRule implements TestRule { |
| |
| private final ExecutorService executor = Executors.newCachedThreadPool( |
| Threads.daemonThreadFactory(getClass().getName())); |
| |
| private final int timeoutSeconds; |
| |
| /** |
| * @param timeoutSeconds the timeout in seconds, if 0 then never times out. |
| */ |
| public TimeoutAndAbortRunRule(int timeoutSeconds) { |
| this.timeoutSeconds = timeoutSeconds; |
| } |
| |
| @Override |
| public Statement apply(final Statement base, Description description) { |
| return new Statement() { |
| @Override |
| public void evaluate() throws Throwable { |
| runWithTimeout(base); |
| } |
| }; |
| } |
| |
| /** |
| * Runs the test on another thread. If the test completes before the |
| * timeout, this reports the result normally. But if the test times out, |
| * this reports the timeout stack trace and begins the process of killing |
| * this no-longer-trustworthy process. |
| */ |
| private void runWithTimeout(final Statement base) throws Throwable { |
| // Start the test on a background thread. |
| final AtomicReference<Thread> executingThreadReference = new AtomicReference<>(); |
| Future<Throwable> result = executor.submit(new Callable<Throwable>() { |
| public Throwable call() throws Exception { |
| executingThreadReference.set(Thread.currentThread()); |
| try { |
| base.evaluate(); |
| return null; |
| } catch (Throwable throwable) { |
| return throwable; |
| } |
| } |
| }); |
| |
| // Wait until either the result arrives or the test times out. |
| Throwable thrown; |
| try { |
| thrown = getThrowable(result); |
| } catch (TimeoutException e) { |
| Thread executingThread = executingThreadReference.get(); |
| if (executingThread != null) { |
| executingThread.interrupt(); |
| e.setStackTrace(executingThread.getStackTrace()); |
| } |
| // Wrap it in an exception that will cause the current run to be aborted. |
| thrown = new VmIsUnstableException(e); |
| } |
| |
| if (thrown != null) { |
| throw thrown; |
| } |
| } |
| |
| @SuppressWarnings("ThrowableResultOfMethodCallIgnored") |
| private Throwable getThrowable(Future<Throwable> result) |
| throws InterruptedException, ExecutionException, TimeoutException { |
| Throwable thrown; |
| thrown = timeoutSeconds == 0 |
| ? result.get() |
| : result.get(timeoutSeconds, TimeUnit.SECONDS); |
| return thrown; |
| } |
| } |
| |