--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/event/runtime/TestClassUnloadEvent.java Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2013, 2018, 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. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package jdk.jfr.event.runtime;
+
+import java.time.Duration;
+import java.util.List;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedClass;
+import jdk.jfr.consumer.RecordedClassLoader;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.test.lib.Asserts;
+import jdk.test.lib.jfr.EventNames;
+import jdk.test.lib.jfr.Events;
+import jdk.test.lib.jfr.TestClassLoader;
+
+/*
+ * @test
+ * @summary The test verifies that a class unload event is created when class is unloaded
+ * @key jfr
+ * @library /test/lib /test/jdk
+ * @build jdk.jfr.event.runtime.TestClasses
+ * @run main/othervm -Xlog:class+unload -Xlog:gc -Xmx16m jdk.jfr.event.runtime.TestClassUnloadEvent
+ */
+
+/**
+ * System.gc() will trigger class unloading if -XX:+ExplicitGCInvokesConcurrent is NOT set.
+ * If this flag is set G1 will never unload classes on System.gc() and
+ * CMS will not guarantee that all semantically dead classes will be unloaded.
+ * As far as the "jfr" key guarantees no VM flags are set from the outside
+ * it should be enough with System.gc().
+ */
+public final class TestClassUnloadEvent {
+ private final static String TEST_CLASS_NAME = "jdk.jfr.event.runtime.TestClasses";
+ private final static String EVENT_PATH = EventNames.ClassUnload;
+
+ // Declare unloadableClassLoader as "public static"
+ // to prevent the compiler to optimize away all unread writes
+ public static TestClassLoader unloadableClassLoader;
+
+ public static void main(String[] args) throws Throwable {
+ Recording recording = new Recording();
+ recording.enable(EVENT_PATH).withThreshold(Duration.ofMillis(0));
+ unloadableClassLoader = new TestClassLoader();
+ recording.start();
+ unloadableClassLoader.loadClass(TEST_CLASS_NAME);
+ unloadableClassLoader = null;
+ System.gc();
+ recording.stop();
+
+ List<RecordedEvent> events = Events.fromRecording(recording);
+ Events.hasEvents(events);
+ boolean isAnyFound = false;
+ for (RecordedEvent event : events) {
+ System.out.println("Event:" + event);
+ RecordedClass unloadedClass = event.getValue("unloadedClass");
+ if (TEST_CLASS_NAME.equals(unloadedClass.getName())) {
+ RecordedClassLoader definingClassLoader = unloadedClass.getClassLoader();
+ Asserts.assertEquals(TestClassLoader.class.getName(), definingClassLoader.getType().getName(),
+ "Expected " + TestClassLoader.class.getName() + ", got " + definingClassLoader.getType().getName());
+ Asserts.assertEquals(TestClassLoader.CLASS_LOADER_NAME, definingClassLoader.getName(),
+ "Expected " + TestClassLoader.CLASS_LOADER_NAME + ", got " + definingClassLoader.getName());
+ Asserts.assertFalse(isAnyFound, "Found more than 1 event");
+ isAnyFound = true;
+ }
+ }
+ Asserts.assertTrue(isAnyFound, "No events found");
+ }
+}