1 /*
   2  * Copyright (c) 2015, 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 import java.util.ArrayList;
  25 import java.util.List;
  26 
  27 import jdk.test.lib.Platform;
  28 import jdk.test.lib.ProcessTools;
  29 import jdk.test.lib.OutputAnalyzer;
  30 import jdk.test.lib.Utils;
  31 import jdk.test.lib.apps.LingeredApp;
  32 
  33 /*
  34  * @test
  35  * @library /test/lib/share/classes
  36  * @library /testlibrary
  37  * @build jdk.test.lib.*
  38  * @build jdk.test.lib.apps.*
  39  * @run main TestClassLoaderStats
  40  */
  41 public class TestClassLoaderStats {
  42 
  43     public static void main(String[] args) throws Exception {
  44         if (!Platform.shouldSAAttach()) {
  45             System.out.println("SA attach not expected to work - test skipped.");
  46             return;
  47         }
  48 
  49         LingeredApp app = null;
  50         try {
  51             List<String> vmArgs = new ArrayList<String>();
  52             vmArgs.add("-XX:+UsePerfData");
  53             vmArgs.addAll(Utils.getVmOptions());
  54             app = LingeredApp.startApp(vmArgs);
  55 
  56             System.out.println("Attaching sun.jvm.hotspot.tools.ClassLoaderStats to " + app.getPid());
  57             ProcessBuilder processBuilder = ProcessTools.createJavaProcessBuilder(
  58                     "-XX:+UsePerfData",
  59                     "sun.jvm.hotspot.tools.ClassLoaderStats",
  60                     Long.toString(app.getPid()));
  61             OutputAnalyzer output = ProcessTools.executeProcess(processBuilder);
  62             System.out.println(output.getOutput());
  63 
  64             output.shouldHaveExitValue(0);
  65             output.shouldContain("Debugger attached successfully.");
  66             // The class loader stats header needs to be presented in the output:
  67             output.shouldMatch("class_loader\\W+classes\\W+bytes\\W+parent_loader\\W+alive?\\W+type");
  68             output.stderrShouldNotMatch("[E|e]xception");
  69             output.stderrShouldNotMatch("[E|e]rror");
  70         } finally {
  71             LingeredApp.stopApp(app);
  72         }
  73     }
  74 
  75 }