More stress tests

Author: AlanBateman

test/jdk/java/lang/Thread/virtual/PinALot.java

@@ -34,13 +34,15 @@
 
 public class PinALot {
 
+    static final int ITERATIONS = 1_000_000;
+
     public static void main(String[] args) throws Exception {
-        AtomicInteger count = new AtomicInteger(1_000_000);
+        AtomicInteger count = new AtomicInteger();
 
         Thread thread = Thread.startVirtualThread(() -> {
             Object lock = new Object();
             synchronized (lock) {
-                while (count.decrementAndGet() > 0) {
+                while (count.incrementAndGet() < ITERATIONS) {
                     LockSupport.parkNanos(1);
                 }
             }
@@ -53,7 +55,7 @@ public static void main(String[] args) throws Exception {
         } while (!terminated);
 
         int countValue = count.get();
-        if (countValue != 0) {
+        if (countValue != ITERATIONS) {
             throw new RuntimeException("count = " + countValue);
         }
     }

test/jdk/java/lang/Thread/virtual/SleepALot.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2020, 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
+ * @run main/othervm/timeout=300 -XX:-UseContinuationChunks SleepALot
+ * @run main/othervm/timeout=300 -XX:+UseContinuationChunks SleepALot
+ * @summary Stress test Thread.sleep
+ */
+
+import java.time.Duration;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class SleepALot {
+
+    static final int ITERATIONS = 10_000_000;
+
+    public static void main(String[] args) throws Exception {
+        AtomicInteger count = new AtomicInteger();
+
+        Thread thread = Thread.startVirtualThread(() -> {
+            while (count.incrementAndGet() < ITERATIONS) {
+                try {
+                    Thread.sleep(Duration.ofNanos(100));
+                } catch (InterruptedException ignore) { }
+            }
+        });
+
+        boolean terminated;
+        do {
+            terminated = thread.join(Duration.ofMillis(500));
+            System.out.println(count.get());
+        } while (!terminated);
+
+        int countValue = count.get();
+        if (countValue != ITERATIONS) {
+            throw new RuntimeException("count = " + countValue);
+        }
+    }
+}

test/jdk/java/lang/Thread/virtual/YieldALot.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2020, 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
+ * @run main/othervm/timeout=300 -XX:-UseContinuationChunks YieldALot
+ * @run main/othervm/timeout=300 -XX:+UseContinuationChunks YieldALot
+ * @summary Stress test Thread.yield
+ */
+
+import java.time.Duration;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class YieldALot {
+
+    static final int ITERATIONS = 10_000_000;
+
+    public static void main(String[] args) throws Exception {
+        AtomicInteger count = new AtomicInteger();
+
+        Thread thread = Thread.startVirtualThread(() -> {
+            while (count.incrementAndGet() < ITERATIONS) {
+                Thread.yield();
+            }
+        });
+
+        boolean terminated;
+        do {
+            terminated = thread.join(Duration.ofMillis(500));
+            System.out.println(count.get());
+        } while (!terminated);
+
+        int countValue = count.get();
+        if (countValue != ITERATIONS) {
+            throw new RuntimeException("count = " + countValue);
+        }
+    }
+}