1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
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   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  *
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  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
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  23 
  24 /*
  25  * @test
  26  * @bug 8059510
  27  * @summary Test SharedSymbolTableBucketSize option
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  */
  32 
  33 import jdk.test.lib.process.ProcessTools;
  34 import jdk.test.lib.process.OutputAnalyzer;
  35 
  36 public class SharedSymbolTableBucketSize {
  37     public static void main(String[] args) throws Exception {
  38         int bucket_size = 8;
  39         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  40             "-Xshare:dump", "-XX:+PrintSharedSpaces",
  41             "-XX:+UnlockDiagnosticVMOptions",
  42             "-XX:SharedArchiveFile=./SharedSymbolTableBucketSize.jsa",
  43             "-XX:SharedSymbolTableBucketSize=" + Integer.valueOf(bucket_size));
  44         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  45         output.shouldContain("Loading classes to share");
  46         output.shouldHaveExitValue(0);
  47 
  48         String s = output.firstMatch("Average bucket size     : .*");
  49         Float f = Float.parseFloat(s.substring(25));
  50         int size = Math.round(f);
  51         if (size != bucket_size) {
  52           throw new Exception("FAILED: incorrect bucket size " + size +
  53                               ", expect " + bucket_size);
  54         }
  55 
  56 
  57         // Invalid SharedSymbolTableBucketSize input
  58         String input[] = {"-XX:SharedSymbolTableBucketSize=-1",
  59                           "-XX:SharedSymbolTableBucketSize=2.5"};
  60         for (int i = 0; i < input.length; i++) {
  61           pb = ProcessTools.createJavaProcessBuilder(
  62                "-Xshare:dump", "-XX:+PrintSharedSpaces",
  63                "-XX:+UnlockDiagnosticVMOptions",
  64                "-XX:SharedArchiveFile=./SharedSymbolTableBucketSize.jsa",
  65                input[i]);
  66           output = new OutputAnalyzer(pb.start());
  67           output.shouldContain("Improperly specified VM option");
  68       }
  69   }
  70 }