1 /*
   2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2018, Google and/or its affiliates. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 package gc.logging;
  26 
  27 import java.io.File;
  28 import java.net.URL;
  29 import java.net.URLClassLoader;
  30 import java.util.regex.Pattern;
  31 import java.util.regex.Matcher;
  32 
  33 import jdk.test.lib.Asserts;
  34 import jdk.test.lib.process.OutputAnalyzer;
  35 import jdk.test.lib.process.ProcessTools;
  36 import sun.hotspot.WhiteBox;
  37 
  38 /*
  39  * @test TestMetaSpaceLog
  40  * @bug 8211123
  41  * @summary Ensure that the Metaspace is updated in the log
  42  * @requires vm.gc=="null"
  43  * @key gc
  44  * @library /test/lib
  45  * @modules java.base/jdk.internal.misc
  46  *          java.management
  47  *
  48  * @compile TestMetaSpaceLog.java
  49  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  50  * @run main gc.logging.TestMetaSpaceLog
  51  */
  52 
  53 public class TestMetaSpaceLog {
  54   private static Pattern metaSpaceRegexp;
  55 
  56   static {
  57     // Do this once here.
  58     metaSpaceRegexp = Pattern.compile(".*Metaspace: ([0-9]+).*->([0-9]+).*");
  59   }
  60 
  61   public static void main(String[] args) throws Exception {
  62     testMetaSpaceUpdate("UseParallelGC");
  63     testMetaSpaceUpdate("UseG1GC");
  64     testMetaSpaceUpdate("UseConcMarkSweepGC");
  65     testMetaSpaceUpdate("UseSerialGC");
  66   }
  67 
  68   private static void verifyContainsMetaSpaceUpdate(OutputAnalyzer output) {
  69     // At least one metaspace line from GC should show GC being collected.
  70     boolean foundCollectedMetaSpace = output.asLines().stream()
  71         .filter(s -> s.contains("[gc,metaspace"))
  72         .anyMatch(TestMetaSpaceLog::check);
  73     Asserts.assertTrue(foundCollectedMetaSpace);
  74   }
  75 
  76   private static boolean check(String line) {
  77     Matcher m = metaSpaceRegexp.matcher(line);
  78     Asserts.assertTrue(m.matches(), "Unexpected line for metaspace logging: " + line);
  79     long before = Long.parseLong(m.group(1));
  80     long after  = Long.parseLong(m.group(2));
  81     return before > after;
  82   }
  83 
  84   private static void testMetaSpaceUpdate(String gcFlag) throws Exception {
  85     // Propagate test.src for the jar file.
  86     String testSrc= "-Dtest.src=" + System.getProperty("test.src", ".");
  87 
  88     System.err.println("Testing with GC Flag: " + gcFlag);
  89     ProcessBuilder pb =
  90       ProcessTools.createJavaProcessBuilder(
  91           "-XX:+" + gcFlag,
  92           "-Xlog:gc*",
  93           "-Xbootclasspath/a:.",
  94           "-XX:+UnlockDiagnosticVMOptions",
  95           "-XX:+WhiteBoxAPI",
  96           "-Xmx1000M",
  97           "-Xms1000M",
  98           testSrc, StressMetaSpace.class.getName());
  99 
 100     OutputAnalyzer output = null;
 101     try {
 102       output = new OutputAnalyzer(pb.start());
 103       verifyContainsMetaSpaceUpdate(output);
 104     } catch (Exception e) {
 105       // For error diagnosis: print and throw.
 106       e.printStackTrace();
 107       output.reportDiagnosticSummary();
 108       throw e;
 109     }
 110   }
 111 
 112   static class StressMetaSpace {
 113     private static URL[] urls = new URL[1];
 114 
 115     static {
 116       try {
 117         File jarFile = new File(System.getProperty("test.src") + "/testcases.jar");
 118         urls[0] = jarFile.toURI().toURL();
 119       } catch (Exception e) {
 120         e.printStackTrace();
 121       }
 122     }
 123 
 124     public static void main(String args[]) {
 125       WhiteBox wb = WhiteBox.getWhiteBox();
 126       for(int i = 0; i < 10000; i++) {
 127         loadClass(wb);
 128       }
 129       wb.fullGC();
 130     }
 131 
 132     public static void loadClass(WhiteBox wb) {
 133       try {
 134         URLClassLoader ucl = new URLClassLoader(urls);
 135         Class.forName("case00", false, ucl);
 136       } catch (Exception e) {
 137         e.printStackTrace();
 138       }
 139     }
 140   }
 141 }