1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test TestPrintClassHistogram
  26  * @bug 8004924
  27  * @summary Checks that jmap -heap contains the flag ClassMetaspaceSize
  28  * @library /testlibrary
  29  * @run main/othervm TestPrintClassHistogram launch BeforeGC
  30  * @run main/othervm TestPrintClassHistogram launch AfterGC
  31  * @run main/othervm TestPrintClassHistogram launch BeforeGC AfterGC
  32  */
  33 
  34 import java.util.List;
  35 import java.util.ArrayList;
  36 import java.util.Arrays;
  37 
  38 import com.oracle.java.testlibrary.OutputAnalyzer;
  39 import com.oracle.java.testlibrary.ProcessTools;
  40 
  41 public class TestPrintClassHistogram {
  42     public static void main(String[] args) throws Exception {
  43         if (shouldLaunchTest(args)) {
  44             String[] testArgs = createTestArguments(args);
  45             ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(testArgs);
  46 
  47             OutputAnalyzer output = new OutputAnalyzer(pb.start());
  48             output.shouldNotContain("WARNING");
  49             output.shouldContain("java.lang.Class"); // there will always be at least one java.lang.Class instance
  50             output.shouldContain("java.lang.String"); // there will always be at least one java.lang.String instance
  51             output.shouldHaveExitValue(0);
  52         } else {
  53             System.gc();
  54         }
  55     }
  56 
  57     private static boolean shouldLaunchTest(String[] cmdlineArguments) {
  58         return cmdlineArguments[0].equals("launch");
  59     }
  60 
  61     private static String[] createTestArguments(String[] cmdlineArguments) {
  62         List<String> cmdlineArgs = Arrays.asList(cmdlineArguments);
  63         List<String> testArgs = new ArrayList<String>();
  64 
  65         if (cmdlineArgs.contains("BeforeGC")) {
  66             testArgs.add("-XX:+PrintClassHistogramBeforeFullGC");
  67         }
  68         if (cmdlineArgs.contains("AfterGC")) {
  69             testArgs.add("-XX:+PrintClassHistogramBeforeFullGC");
  70         }
  71 
  72         testArgs.add("TestPrintClassHistogram");
  73         testArgs.add("run");
  74 
  75         return testArgs.toArray(new String[testArgs.size()]);
  76     }
  77 }