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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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 */

/*
 * @test
 *
 * @summary converted from VM Testbase nsk/jvmti/MethodEntry/mentry002.
 * VM Testbase keywords: [quick, jpda, jvmti, noras]
 * VM Testbase readme:
 * DESCRIPTION
 *     Regression test for bug
 *         4248826 Method entry/exit events are not created for empty methods
 *         Release summary: 1.0_fcs
 *         Hardware version: generic
 *         O/S version (unbundled products): generic
 * COMMENTS
 *     The test reproduced the bug on winNT 1.0fcs-E build.
 *     Ported from JVMDI test /nsk/regression/b4248826.
 *
 * @requires vm.continuations
 * @library /test/lib
 * @compile --enable-preview -source ${jdk.version} mentry02.java
 * @run main/othervm/native --enable-preview -agentlib:mentry02 mentry02
 */


public class mentry02 {

    final static int MAX_LOOP = 100;

    static {
        System.loadLibrary("mentry02");
    }

    static volatile int result;
    native static void getReady(int i);
    native static int check();

    public static void main(String args[]) {
        testVirtualThread();
        testPlatformThread();
    }
    public static void testVirtualThread() {
        Thread thread = Thread.startVirtualThread(() -> {
            getReady(MAX_LOOP);

            for (int i = 0; i < MAX_LOOP; i++) {
                emptyMethod();
            }
            result = check();
        });
        try {
            thread.join();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }

        if (result != 0) {
            throw new RuntimeException("check failed with result " + result);
        }
    }
    public static void testPlatformThread() {
        getReady(MAX_LOOP);

        for (int i = 0; i < MAX_LOOP; i++) {
            emptyMethod();
        }
        result = check();
        if (result != 0) {
            throw new RuntimeException("check failed with result " + result);
        }
    }

    public static void emptyMethod() {}
}