122 lines
4.5 KiB
Java
122 lines
4.5 KiB
Java
/*
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* Copyright (c) 2017, 2024, 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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* @bug 8185164 8320515 8334085
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* @summary Checks that a contended monitor does not show up in the list of owned monitors.
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* 8320515 piggy-backs on this test and injects an owned monitor with a dead object,
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and checks that that monitor isn't exposed to GetOwnedMonitorInfo.
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* @requires vm.jvmti
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* @compile GetOwnedMonitorInfoTest.java
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* @run main/othervm/native -agentlib:GetOwnedMonitorInfoTest GetOwnedMonitorInfoTest
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*/
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import java.io.PrintStream;
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public class GetOwnedMonitorInfoTest {
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static {
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try {
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System.loadLibrary("GetOwnedMonitorInfoTest");
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} catch (UnsatisfiedLinkError ule) {
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System.err.println("Could not load GetOwnedMonitorInfoTest library");
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System.err.println("java.library.path: "
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+ System.getProperty("java.library.path"));
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throw ule;
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}
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}
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private static native void jniMonitorEnter(Object obj);
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private static native int check();
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private static native boolean hasEventPosted();
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private static void jniMonitorEnterAndLetObjectDie() {
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// The monitor iterator used by GetOwnedMonitorInfo used to
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// assert when an owned monitor with a dead object was found.
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// Inject this situation into this test that performs other
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// GetOwnedMonitorInfo testing.
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Object obj = new Object() {};
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jniMonitorEnter(obj);
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if (!Thread.holdsLock(obj)) {
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throw new RuntimeException("The object is not locked");
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}
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obj = null;
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System.gc();
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}
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public static void main(String[] args) throws Exception {
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runTest(true, true);
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runTest(true, false);
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runTest(false, true);
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runTest(false, false);
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}
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static int t_num = 0;
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public static void runTest(boolean isVirtual, boolean jni) throws Exception {
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var threadFactory = isVirtual ? Thread.ofVirtual().factory() : Thread.ofPlatform().factory();
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final GetOwnedMonitorInfoTest lock = new GetOwnedMonitorInfoTest();
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Thread t1 = threadFactory.newThread(() -> {
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Thread.currentThread().setName((isVirtual ? "Virtual-" : "") + "Worker-Thread-" + t_num);
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t_num++;
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if (jni) {
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System.out.println("Thread doing JNI call: "
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+ Thread.currentThread().getName());
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// Extra unmount helps to reproduce 8334085.
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// Two sub-sequential thaws are needed in that scenario.
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Thread.yield();
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jniMonitorEnterAndLetObjectDie();
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}
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synchronized (lock) {
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System.out.println("Thread in sync section: "
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+ Thread.currentThread().getName());
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}
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});
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// Make sure t1 contends on the monitor.
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synchronized (lock) {
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System.out.print("Main starting worker thread for ");
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System.out.print(isVirtual ? "virtual " : "non-virtual ");
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System.out.println(jni ? "JNI" : "non-JNI");
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t1.start();
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// Wait for the MonitorContendedEnter event
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while (!hasEventPosted()) {
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System.out.println("Main waiting for event.");
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Thread.sleep(100);
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}
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}
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t1.join();
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if (check() != 0) {
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throw new RuntimeException("FAILED status returned from the agent");
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}
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}
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}
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