jdk

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/*
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 * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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/*
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 * @test SuspendBlocked
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 * @bug 8270085
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 * @library /test/lib /testlibrary
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 * @build SuspendBlocked
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 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SuspendBlocked
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 */
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import jvmti.JVMTIUtils;
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import jdk.test.lib.Asserts;
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import jdk.test.whitebox.WhiteBox;
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public class SuspendBlocked {
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    public static void main(String... args) throws Exception {
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        Thread suspend_thread = new Thread(() -> run_loop());
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        suspend_thread.start();
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        WhiteBox wb = WhiteBox.getWhiteBox();
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        for (int i = 0; i < 100; i++) {
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            try {
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                JVMTIUtils.suspendThread(suspend_thread);
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                wb.lockAndBlock(/* suspender= */ true);
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                JVMTIUtils.resumeThread(suspend_thread);
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                Thread.sleep(1);
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            } catch (JVMTIUtils.JvmtiException e) {
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                if (e.getCode() != JVMTIUtils.JVMTI_ERROR_THREAD_NOT_ALIVE) {
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                    throw e;
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                }
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            }
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        }
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        suspend_thread.join();
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    }
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    public static void run_loop() {
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        WhiteBox wb = WhiteBox.getWhiteBox();
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        for (int i = 0; i < 100; i++) {
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            wb.lockAndBlock(/* suspender= */ false);
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        }
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    }
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}
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