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    1   /*
    2    * Copyright (c) 2004, 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   package sun.jvm.hotspot.tools;
   26   
   27   import java.io;
   28   import sun.jvm.hotspot.runtime;
   29   
   30   public class JSnap extends Tool {
   31       public void run() {
   32           final PrintStream out = System.out;
   33           if (PerfMemory.initialized()) {
   34               PerfDataPrologue prologue = PerfMemory.prologue();
   35               if (prologue.accessible()) {
   36                   PerfMemory.iterate(new PerfMemory.PerfDataEntryVisitor() {
   37                           public boolean visit(PerfDataEntry pde) {
   38                               if (pde.supported()) {
   39                                   out.print(pde.name());
   40                                   out.print('=');
   41                                   out.println(pde.valueAsString());
   42                               }
   43                               // goto next entry
   44                               return true;
   45                           }
   46                       });
   47               } else {
   48                   out.println("PerfMemory is not accessible");
   49               }
   50           } else {
   51               out.println("PerfMemory is not initialized");
   52           }
   53       }
   54   
   55       public static void main(String[] args) {
   56           JSnap js = new JSnap();
   57           js.start(args);
   58           js.stop();
   59       }
   60   }

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