100 lines
3.6 KiB
Java
100 lines
3.6 KiB
Java
/*
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* Copyright (c) 2022, 2023, 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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* @bug 8320515
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* @summary This test checks that ObjectMonitors with dead objects don't
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* cause asserts, crashes, or failures when various sub-systems
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* in the JVM find them.
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* @library /testlibrary /test/lib
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* @modules jdk.management
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*/
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/*
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* @requires os.family != "windows" & os.family != "aix"
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* @test id=DetachThread
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* @run main/othervm/native MonitorWithDeadObjectTest 0
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*/
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/*
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* @requires os.family != "windows" & os.family != "aix"
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* @test id=DumpThreadsBeforeDetach
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* @run main/othervm/native MonitorWithDeadObjectTest 1
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*/
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/*
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* @requires os.family != "windows" & os.family != "aix"
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* @test id=DumpThreadsAfterDetach
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* @run main/othervm/native MonitorWithDeadObjectTest 2
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*/
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import java.lang.management.ManagementFactory;
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import java.lang.management.ThreadMXBean;
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public class MonitorWithDeadObjectTest {
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public static native void createMonitorWithDeadObject();
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public static native void createMonitorWithDeadObjectDumpThreadsBeforeDetach();
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static {
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System.loadLibrary("MonitorWithDeadObjectTest");
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}
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private static void dumpThreadsWithLockedMonitors() {
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ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
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threadBean.dumpAllThreads(true, false);
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}
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private static void testDetachThread() {
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// Create an ObjectMonitor with a dead object from an attached thread.
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// This used to provoke an assert in DetachCurrentThread.
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createMonitorWithDeadObject();
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}
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private static void testDumpThreadsBeforeDetach() {
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// Create an ObjectMonitor with a dead object from an attached thread
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// and perform a thread dump before detaching the thread.
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createMonitorWithDeadObjectDumpThreadsBeforeDetach();
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}
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private static void testDumpThreadsAfterDetach() {
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createMonitorWithDeadObject();
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// The thread dumping code used to not tolerate monitors with dead
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// objects and the detach code used to not unlock these monitors, so
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// test that we don't end up with a bug where these monitors are not
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// unlocked and then passed to the thread dumping code.
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dumpThreadsWithLockedMonitors();
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}
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public static void main(String[] args) throws Exception {
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int test = Integer.parseInt(args[0]);
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switch (test) {
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case 0: testDetachThread(); break;
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case 1: testDumpThreadsBeforeDetach(); break;
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case 2: testDumpThreadsAfterDetach(); break;
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default: throw new RuntimeException("Unknown test");
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};
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}
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}
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