1 files changed, 65 insertions, 0 deletions
diff --git a/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/FreezeMonitor.java b/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/FreezeMonitor.java
new file mode 100644
index 000000000..19fd7a728
--- /dev/null
+++ b/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/FreezeMonitor.java
@@ -0,0 +1,65 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Google, Inc and others.
+ * 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:
+ *   Stefan Xenos (Google) - Initial implementation
+ *******************************************************************************/
+package org.eclipse.jdt.core.tests.model;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.ThreadInfo;
+import java.lang.management.ThreadMXBean;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.ICoreRunnable;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.OperationCanceledException;
+import org.eclipse.core.runtime.jobs.Job;
+
+public class FreezeMonitor {
+
+	private static /* @Nullable */ Job monitorJob;  
+
+	public static void expectCompletionIn(final long millis) {
+		done();
+		monitorJob = Job.create("", new ICoreRunnable() {
+			@Override
+			public void run(IProgressMonitor monitor) throws CoreException {
+				if (monitor.isCanceled()) {
+					throw new OperationCanceledException();
+				}
+				StringBuilder result = new StringBuilder();
+				result.append("Possible frozen test case\n");
+				ThreadMXBean threadStuff = ManagementFactory.getThreadMXBean();
+				ThreadInfo[] allThreads = threadStuff.getThreadInfo(threadStuff.getAllThreadIds(), 200);
+				for (ThreadInfo threadInfo : allThreads) {
+					result.append("\"");
+					result.append(threadInfo.getThreadName());
+					result.append("\": ");
+					result.append(threadInfo.getThreadState());
+					result.append("\n");
+					final StackTraceElement[] elements = threadInfo.getStackTrace();
+					for (StackTraceElement element : elements) {
+						result.append("    ");
+						result.append(element);
+						result.append("\n");
+					}
+					result.append("\n");
+				}
+				System.out.println(result.toString());
+			}
+		});
+		monitorJob.schedule(millis);
+	}
+
+	public static void done() {
+		if (monitorJob != null) {
+			monitorJob.cancel();
+			monitorJob = null;
+		}
+	}
+}