/* * Copyright (c) 2021, 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 * @bug 8212155 * @summary Test concurrent enabling and posting of DynamicCodeGenerated events. * @requires vm.jvmti * @library /test/lib * @run main/othervm/native -agentlib:DynamicCodeGenerated DynamicCodeGeneratedTest */ import java.lang.ref.Reference; public class DynamicCodeGeneratedTest { static { System.loadLibrary("DynamicCodeGenerated"); } public static native void changeEventNotificationMode(); public static void main(String[] args) { // Try to enable DynamicCodeGenerated event while it is posted // using JvmtiDynamicCodeEventCollector from VtableStubs::find_stub Thread t = new Thread(() -> { changeEventNotificationMode(); }); t.setDaemon(true); t.start(); for (int i = 0; i < 2000; i++) { new Thread(() -> { String result = "string" + System.currentTimeMillis(); Reference.reachabilityFence(result); }).start(); } } }