139 lines
4.7 KiB
Java
139 lines
4.7 KiB
Java
/*
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* Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2018, Google 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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package gc.logging;
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import java.io.File;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.ByteCodeLoader;
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import jdk.test.lib.compiler.InMemoryJavaCompiler;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.whitebox.WhiteBox;
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/*
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* @test TestMetaSpaceLog
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* @bug 8211123
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* @summary Ensure that the Metaspace is updated in the log
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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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* @requires vm.gc != "Epsilon"
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* @requires vm.gc != "Z"
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* @requires os.maxMemory >= 2G
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*
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* @compile TestMetaSpaceLog.java
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run driver gc.logging.TestMetaSpaceLog
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*/
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public class TestMetaSpaceLog {
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private static Pattern metaSpaceRegexp;
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static {
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// Do this once here.
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// Scan for Metaspace update notices as part of the GC log, e.g. in this form:
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// [gc,metaspace ] GC(0) Metaspace: 11895K(14208K)->11895K(14208K) NonClass: 10552K(12544K)->10552K(12544K) Class: 1343K(1664K)->1343K(1664K)
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// This regex has to be up-to-date with the format used in hotspot to print metaspace change.
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final String NUM_K = "\\d+K";
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final String GP_NUM_K = "(\\d+)K";
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final String BR_NUM_K = "\\(" + NUM_K + "\\)";
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final String SIZE_CHG = NUM_K + BR_NUM_K + "->" + NUM_K + BR_NUM_K;
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metaSpaceRegexp = Pattern.compile(".* Metaspace: " + GP_NUM_K + BR_NUM_K + "->" + GP_NUM_K + BR_NUM_K
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+ "( NonClass: " + SIZE_CHG + " Class: " + SIZE_CHG + ")?$");
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}
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public static void main(String[] args) throws Exception {
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testMetaSpaceUpdate();
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}
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private static void verifyContainsMetaSpaceUpdate(OutputAnalyzer output) {
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// At least one metaspace line from GC should show GC being collected.
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boolean foundCollectedMetaSpace = output.asLines().stream()
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.filter(s -> s.contains("[gc,metaspace"))
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.anyMatch(TestMetaSpaceLog::check);
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Asserts.assertTrue(foundCollectedMetaSpace);
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}
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private static boolean check(String line) {
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Matcher m = metaSpaceRegexp.matcher(line);
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if (m.matches()) {
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// Numbers for Metaspace occupation should grow.
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long before = Long.parseLong(m.group(1));
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long after = Long.parseLong(m.group(2));
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return before > after;
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}
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return false;
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}
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private static void testMetaSpaceUpdate() throws Exception {
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OutputAnalyzer output = null;
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try {
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output = ProcessTools.executeTestJava(
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"-Xlog:gc*",
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"-Xbootclasspath/a:.",
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"-XX:+UnlockDiagnosticVMOptions",
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"-XX:+WhiteBoxAPI",
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"-Xmx1000M",
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"-Xms1000M",
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StressMetaSpace.class.getName());
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verifyContainsMetaSpaceUpdate(output);
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} catch (Exception e) {
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// For error diagnosis: print and throw.
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e.printStackTrace();
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if (output != null) {
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output.reportDiagnosticSummary();
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}
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throw e;
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}
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}
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static class StressMetaSpace {
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public static void main(String args[]) {
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loadManyClasses();
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WhiteBox.getWhiteBox().fullGC();
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}
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public static void loadManyClasses() {
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String className = "Tmp";
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String sourceCode = "public class Tmp {}";
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byte[] byteCode = InMemoryJavaCompiler.compile(className, sourceCode);
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try {
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for (int i = 0; i < 10000; i++) {
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ByteCodeLoader.load(className, byteCode);
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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}
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