jdk8u/hotspot/test/serviceability/jvmti/DynamicCodeGenerated/DynamicCodeGenerated.java

/*
 * Copyright (c) 2021, 2025, 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
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 */

public class DynamicCodeGenerated {
    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();

                // Keep a reference to result
                if (result.hashCode() == System.currentTimeMillis()) {
                    // Shouldn't happen
                    return;
                }
            }).start();
        }
    }
}