Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/logging/CountingProxy.java @ 21640:11f68b116a07
mx: added support for server-nograal and client-nograal aliases
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 01 Jun 2015 18:04:12 +0200 |
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1 /* |
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2 * Copyright (c) 2011, 2015, 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.jvmci.hotspot.logging; |
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24 |
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25 import java.lang.reflect.*; |
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26 import java.util.*; |
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27 import java.util.concurrent.*; |
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28 import java.util.concurrent.atomic.*; |
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29 |
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30 import com.oracle.jvmci.debug.*; |
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31 |
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32 /** |
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33 * A java.lang.reflect proxy that hierarchically logs all method invocations along with their |
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34 * parameters and return values. |
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35 */ |
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36 public class CountingProxy<T> implements InvocationHandler { |
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37 |
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38 public static final boolean ENABLED = Boolean.valueOf(System.getProperty("jvmci.countcalls")); |
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39 |
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40 private T delegate; |
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41 |
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42 private ConcurrentHashMap<Method, AtomicLong> calls = new ConcurrentHashMap<>(); |
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43 |
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44 public CountingProxy(T delegate) { |
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45 assert ENABLED; |
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46 TTY.println("Counting proxy for " + delegate.getClass().getSimpleName() + " created"); |
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47 this.delegate = delegate; |
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48 proxies.add(this); |
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49 } |
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50 |
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51 @Override |
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52 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
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53 int argCount = args == null ? 0 : args.length; |
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54 if (method.getParameterTypes().length != argCount) { |
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55 throw new RuntimeException("wrong parameter count"); |
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56 } |
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57 final Object result; |
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58 if (!calls.containsKey(method)) { |
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59 calls.putIfAbsent(method, new AtomicLong(0)); |
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60 } |
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61 AtomicLong count = calls.get(method); |
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62 count.incrementAndGet(); |
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63 try { |
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64 if (args == null) { |
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65 result = method.invoke(delegate); |
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66 } else { |
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67 result = method.invoke(delegate, args); |
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68 } |
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69 } catch (InvocationTargetException e) { |
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70 throw e.getCause(); |
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71 } |
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72 return result; |
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73 } |
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74 |
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75 public static <T> T getProxy(Class<T> interf, T delegate) { |
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76 Class<?>[] interfaces = ProxyUtil.getAllInterfaces(delegate.getClass()); |
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77 Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new CountingProxy<>(delegate)); |
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78 return interf.cast(obj); |
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79 } |
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80 |
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81 private static ArrayList<CountingProxy<?>> proxies = new ArrayList<>(); |
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82 |
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83 static { |
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84 if (ENABLED) { |
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85 Runtime.getRuntime().addShutdownHook(new Thread() { |
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86 |
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87 @Override |
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88 public void run() { |
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89 for (CountingProxy<?> proxy : proxies) { |
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90 proxy.print(); |
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91 } |
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92 } |
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93 }); |
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94 } |
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95 } |
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96 |
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97 protected void print() { |
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98 long sum = 0; |
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99 for (Map.Entry<Method, AtomicLong> entry : calls.entrySet()) { |
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100 Method method = entry.getKey(); |
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101 long count = entry.getValue().get(); |
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102 sum += count; |
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103 TTY.println(delegate.getClass().getSimpleName() + "." + method.getName() + ": " + count); |
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104 } |
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105 TTY.println(delegate.getClass().getSimpleName() + " calls: " + sum); |
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106 } |
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107 } |