67 lines
2.8 KiB
Java
67 lines
2.8 KiB
Java
/*
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* Copyright (c) 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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* @test
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* @summary Verifies JVMTI can_support_virtual_threads works for agents loaded at startup and into running VM
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* @requires vm.jvmti
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* @requires vm.continuations
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* @enablePreview
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* @run main/othervm/native -agentlib:VirtualThreadStartTest VirtualThreadStartTest
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* @run main/othervm/native -agentlib:VirtualThreadStartTest=can_support_virtual_threads VirtualThreadStartTest
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* @run main/othervm/native -Djdk.attach.allowAttachSelf=true VirtualThreadStartTest attach
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* @run main/othervm/native -Djdk.attach.allowAttachSelf=true VirtualThreadStartTest attach can_support_virtual_threads
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*/
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import com.sun.tools.attach.VirtualMachine;
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public class VirtualThreadStartTest {
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private static final String AGENT_LIB = "VirtualThreadStartTest";
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private static final int THREAD_CNT = 10;
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private static native int getAndResetStartedThreads();
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public static void main(String[] args) throws Exception {
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System.out.println("loading " + AGENT_LIB + " lib");
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if (args.length > 0 && args[0].equals("attach")) { // agent loaded into running VM case
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String arg = args.length == 2 ? args[1] : "";
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VirtualMachine vm = VirtualMachine.attach(String.valueOf(ProcessHandle.current().pid()));
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vm.loadAgentLibrary(AGENT_LIB, arg);
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} else {
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System.loadLibrary(AGENT_LIB);
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}
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getAndResetStartedThreads();
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for (int i = 0; i < THREAD_CNT; i++) {
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Thread.ofVirtual().name("Tested-VT-" + i).start(() -> {}).join();
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}
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int startedThreads = getAndResetStartedThreads();
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System.out.println("ThreadStart event count: " + startedThreads + ", expected: " + THREAD_CNT);
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if (startedThreads != THREAD_CNT) {
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throw new RuntimeException("Failed: wrong ThreadStart event count");
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}
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}
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}
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