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 TestStringSymbolTableStats.java
  26  * @bug 8027476 8027455
  27  * @requires vm.gc=="G1" | vm.gc=="null"
  28  * @summary Ensure that the G1TraceStringSymbolTableScrubbing prints the expected message.
  29  * @key gc
  30  * @library /testlibrary
  31  */
  32 
  33 import com.oracle.java.testlibrary.ProcessTools;
  34 import com.oracle.java.testlibrary.OutputAnalyzer;
  35 
  36 public class TestStringSymbolTableStats {
  37   public static void main(String[] args) throws Exception {
  38 
  39     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
  40                                                               "-XX:+UnlockExperimentalVMOptions",
  41                                                               "-XX:+G1TraceStringSymbolTableScrubbing",
  42                                                               SystemGCTest.class.getName());
  43 
  44     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  45 
  46     System.out.println("Output:\n" + output.getOutput());
  47 
  48     output.shouldContain("Cleaned string and symbol table");
  49     output.shouldHaveExitValue(0);
  50   }
  51 
  52   static class SystemGCTest {
  53     public static void main(String [] args) {
  54       System.out.println("Calling System.gc()");
  55       System.gc();
  56     }
  57   }
  58 }