Mercurial > hg > truffle
annotate truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/DebugCounter.java @ 22291:c3ea80aa5762
make debug counters optional
author | Andreas Woess <andreas.woess@oracle.com> |
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date | Thu, 08 Oct 2015 14:21:33 +0200 |
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1 /* |
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2 * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.object; |
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24 |
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25 import java.io.PrintStream; |
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26 import java.util.ArrayList; |
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27 import java.util.concurrent.atomic.AtomicLong; |
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28 |
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29 public abstract class DebugCounter { |
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30 private DebugCounter() { |
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31 } |
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32 |
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33 public abstract long get(); |
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34 |
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35 public abstract void inc(); |
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36 |
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37 public static DebugCounter create(String name) { |
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38 return ObjectStorageOptions.DebugCounters ? DebugCounterImpl.createImpl(name) : Dummy.INSTANCE; |
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39 } |
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40 |
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41 public static void dumpCounters() { |
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42 if (ObjectStorageOptions.DebugCounters) { |
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43 DebugCounterImpl.dumpCounters(System.out); |
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44 } |
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45 } |
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46 |
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47 private static final class DebugCounterImpl extends DebugCounter { |
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48 private static final ArrayList<DebugCounter> allCounters = new ArrayList<>(); |
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49 |
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50 private final String name; |
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51 private final AtomicLong value; |
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52 |
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53 private DebugCounterImpl(String name) { |
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54 this.name = name; |
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55 this.value = new AtomicLong(); |
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56 allCounters.add(this); |
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57 } |
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58 |
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59 private static DebugCounter createImpl(String name) { |
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60 return new DebugCounterImpl(name); |
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61 } |
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62 |
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63 @Override |
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64 public long get() { |
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65 return value.get(); |
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66 } |
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67 |
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68 @Override |
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69 public void inc() { |
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70 value.incrementAndGet(); |
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71 } |
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72 |
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73 @Override |
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74 public String toString() { |
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75 return name + ": " + get(); |
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76 } |
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77 |
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78 private static void dumpCounters(PrintStream out) { |
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79 for (DebugCounter counter : allCounters) { |
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80 out.println(counter); |
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81 } |
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82 } |
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83 } |
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84 |
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85 private static final class Dummy extends DebugCounter { |
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86 static final DebugCounter INSTANCE = new Dummy(); |
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87 |
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88 private Dummy() { |
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89 } |
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90 |
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91 @Override |
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92 public long get() { |
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93 return 0; |
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94 } |
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95 |
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96 @Override |
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97 public void inc() { |
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98 } |
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99 } |
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100 } |