106 lines
4.0 KiB
Java
106 lines
4.0 KiB
Java
/*
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* Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2021, NTT DATA.
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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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import sun.jvm.hotspot.HotSpotAgent;
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import sun.jvm.hotspot.oops.Oop;
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import sun.jvm.hotspot.runtime.ObjectMonitor;
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import sun.jvm.hotspot.runtime.ObjectSynchronizer;
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import sun.jvm.hotspot.runtime.VM;
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import jdk.test.lib.apps.LingeredApp;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.SA.SATestUtils;
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/**
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* @test
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* @bug 8259008
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* @library /test/lib
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* @requires vm.hasSA
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* @modules jdk.hotspot.agent/sun.jvm.hotspot
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* jdk.hotspot.agent/sun.jvm.hotspot.oops
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* jdk.hotspot.agent/sun.jvm.hotspot.runtime
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* @run driver TestObjectMonitorIterate
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*/
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public class TestObjectMonitorIterate {
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private static void test(String pid) {
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HotSpotAgent agent = new HotSpotAgent();
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agent.attach(Integer.parseInt(pid));
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try {
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var heap = VM.getVM().getObjectHeap();
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var itr = ObjectSynchronizer.objectMonitorIterator();
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if (!itr.hasNext()) {
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throw new RuntimeException("Monitor not found");
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}
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while (itr.hasNext()) {
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ObjectMonitor mon = (ObjectMonitor)itr.next();
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if (mon.object() == null) {
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System.out.println("Monitor found: object is null");
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} else {
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Oop oop = heap.newOop(mon.object());
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System.out.println("Monitor found: " + oop.getKlass().getName().asString());
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}
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}
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} finally {
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agent.detach();
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}
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}
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private static void createAnotherToAttach(long lingeredAppPid) throws Exception {
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// Start a new process to attach to the lingered app
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ProcessBuilder processBuilder = ProcessTools.createLimitedTestJavaProcessBuilder(
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"--add-modules=jdk.hotspot.agent",
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"--add-exports=jdk.hotspot.agent/sun.jvm.hotspot=ALL-UNNAMED",
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"--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.oops=ALL-UNNAMED",
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"--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.runtime=ALL-UNNAMED",
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"TestObjectMonitorIterate",
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Long.toString(lingeredAppPid));
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SATestUtils.addPrivilegesIfNeeded(processBuilder);
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OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
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SAOutput.shouldContain("SteadyStateLock");
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SAOutput.shouldHaveExitValue(0);
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System.out.println(SAOutput.getOutput());
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}
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public static void main (String... args) throws Exception {
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SATestUtils.skipIfCannotAttach(); // throws SkippedException if attach not expected to work.
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if (args == null || args.length == 0) {
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LingeredApp app = new LingeredAppWithLock();
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try {
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LingeredApp.startApp(app, "-XX:+UsePerfData");
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createAnotherToAttach(app.getPid());
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} finally {
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LingeredApp.stopApp(app);
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}
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} else {
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test(args[0]);
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}
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}
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}
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