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  * @key gc
  43  * @library /test/lib
  44  * @modules java.base/jdk.internal.misc
  45  *          java.management
  46  * @requires vm.gc != "Epsilon"
  47  * @requires vm.gc != "Z"
  48  * @requires vm.gc != "Shenandoah"
  49  *
  50  * @compile TestMetaSpaceLog.java
  51  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  52  * @run driver gc.logging.TestMetaSpaceLog
  53  */
  54 
  55 public class TestMetaSpaceLog {
  56   private static Pattern metaSpaceRegexp;
  57 
  58   static {
  59     // Do this once here.
  60     metaSpaceRegexp = Pattern.compile(".*Metaspace: ([0-9]+).*->([0-9]+).*");
  61   }
  62 
  63   public static void main(String[] args) throws Exception {
  64     testMetaSpaceUpdate();
  65   }
  66 
  67   private static void verifyContainsMetaSpaceUpdate(OutputAnalyzer output) {
  68     // At least one metaspace line from GC should show GC being collected.
  69     boolean foundCollectedMetaSpace = output.asLines().stream()
  70         .filter(s -> s.contains("[gc,metaspace"))
  71         .anyMatch(TestMetaSpaceLog::check);
  72     Asserts.assertTrue(foundCollectedMetaSpace);
  73   }
  74 
  75   private static boolean check(String line) {
  76     Matcher m = metaSpaceRegexp.matcher(line);
  77     Asserts.assertTrue(m.matches(), "Unexpected line for metaspace logging: " + line);
  78     long before = Long.parseLong(m.group(1));
  79     long after  = Long.parseLong(m.group(2));
  80     return before > after;
  81   }
  82 
  83   private static void testMetaSpaceUpdate() throws Exception {
  84     // Propagate test.src for the jar file.
  85     String testSrc= "-Dtest.src=" + System.getProperty("test.src", ".");
  86 
  87     ProcessBuilder pb =
  88       ProcessTools.createJavaProcessBuilder(
  89           true,
  90           "-Xlog:gc*",
  91           "-Xbootclasspath/a:.",
  92           "-XX:+UnlockDiagnosticVMOptions",
  93           "-XX:+WhiteBoxAPI",
  94           "-Xmx1000M",
  95           "-Xms1000M",
  96           testSrc, StressMetaSpace.class.getName());
  97 
  98     OutputAnalyzer output = null;
  99     try {
 100       output = new OutputAnalyzer(pb.start());
 101       verifyContainsMetaSpaceUpdate(output);
 102     } catch (Exception e) {
 103       // For error diagnosis: print and throw.
 104       e.printStackTrace();
 105       output.reportDiagnosticSummary();
 106       throw e;
 107     }
 108   }
 109 
 110   static class StressMetaSpace {
 111     private static URL[] urls = new URL[1];
 112 
 113     static {
 114       try {
 115         File jarFile = new File(System.getProperty("test.src") + "/testcases.jar");
 116         urls[0] = jarFile.toURI().toURL();
 117       } catch (Exception e) {
 118         e.printStackTrace();
 119       }
 120     }
 121 
 122     public static void main(String args[]) {
 123       WhiteBox wb = WhiteBox.getWhiteBox();
 124       for(int i = 0; i < 10000; i++) {
 125         loadClass(wb);
 126       }
 127       wb.fullGC();
 128     }
 129 
 130     public static void loadClass(WhiteBox wb) {
 131       try {
 132         URLClassLoader ucl = new URLClassLoader(urls);
 133         ucl.loadClass("case00");
 134       } catch (Exception e) {
 135         e.printStackTrace();
 136       }
 137     }
 138   }
 139 }