67 lines
2.6 KiB
Java
67 lines
2.6 KiB
Java
/*
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* Copyright (c) 2023, Azul Systems, Inc. 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 run NMT baseline, create threads and verify output from summary.diff
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* @author Evgeny Ignatenko
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:NativeMemoryTracking=summary SummaryDiffThreadCount
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*/
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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.JDKToolFinder;
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public class SummaryDiffThreadCount {
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public static void main(String args[]) throws Exception {
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ProcessBuilder pb = new ProcessBuilder();
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OutputAnalyzer output;
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// Grab my own PID.
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String pid = Long.toString(ProcessTools.getProcessId());
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pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "baseline=true"});
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pb.start().waitFor();
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Baseline taken");
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// Creating 10 threads.
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for (int i = 0; i < 10; i++) {
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new Thread(()-> {
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while (true) { continue; }
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}).start();
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}
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// Running "jcmd <pid> VM.native_memory summary.diff" and checking for five new threads reported.
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pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary.diff"});
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output = new OutputAnalyzer(pb.start());
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// Trailing '+' is needed to check that NMT now reports that now we have more threads than it
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// was during the baseline.
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output.shouldMatch("threads #\\d+ \\+");
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}
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}
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