1 /*
   2  * Copyright (c) 2004, 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 package sun.jvm.hotspot.tools;
  26 
  27 import java.io.*;
  28 import java.util.*;
  29 import java.util.stream.*;
  30 import sun.jvm.hotspot.debugger.JVMDebugger;
  31 import sun.jvm.hotspot.runtime.*;
  32 
  33 public class JSnap extends Tool {
  34 
  35     private boolean all;
  36 
  37     public JSnap() {
  38         super();
  39     }
  40 
  41     public JSnap(JVMDebugger d) {
  42         super(d);
  43     }
  44 
  45     public void run() {
  46         final PrintStream out = System.out;
  47         if (PerfMemory.initialized()) {
  48             PerfDataPrologue prologue = PerfMemory.prologue();
  49             if (prologue.accessible()) {
  50                 PerfMemory.iterate(new PerfMemory.PerfDataEntryVisitor() {
  51                         public boolean visit(PerfDataEntry pde) {
  52                             if (all || pde.supported()) {
  53                                 out.print(pde.name());
  54                                 out.print('=');
  55                                 out.println(pde.valueAsString());
  56                             }
  57                             // goto next entry
  58                             return true;
  59                         }
  60                     });
  61             } else {
  62                 out.println("PerfMemory is not accessible");
  63             }
  64         } else {
  65             out.println("PerfMemory is not initialized");
  66         }
  67     }
  68 
  69     @Override
  70     protected void printFlagsUsage() {
  71         System.out.println("    -a\tto print all performance counters");
  72         super.printFlagsUsage();
  73     }
  74 
  75     public static void main(String[] args) {
  76         JSnap js = new JSnap();
  77         js.all = Arrays.stream(args)
  78                        .anyMatch(s -> s.equals("-a"));
  79 
  80         if (js.all) {
  81             args = Arrays.stream(args)
  82                          .filter(s -> !s.equals("-a"))
  83                          .collect(Collectors.toList())
  84                          .toArray(new String[0]);
  85         }
  86 
  87         js.execute(args);
  88     }
  89 }
--- EOF ---