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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/logging/CountingProxy.java @ 2061:c0b1d6a44a02

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Implemented fast inline array allocation.
author Thomas Wuerthinger <wuerthinger@ssw.jku.at>
date Sat, 22 Jan 2011 14:37:43 +0100
parents 9e5e83ca2259
children 8c426c2891c8
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1 /*
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2 * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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5 * that is described in this document. In particular, and without limitation, these intellectual property
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6 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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7 * more additional patents or pending patent applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
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10 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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11 * supplements.
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12 *
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13 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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14 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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15 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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16 * U.S. and other countries.
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17 *
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18 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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19 * Company, Ltd.
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20 */
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21 package com.sun.hotspot.c1x.logging;
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22
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23 import java.lang.reflect.*;
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24 import java.util.*;
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25
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26 /**
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27 * A java.lang.reflect proxy that hierarchically logs all method invocations along with their parameters and return
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28 * values.
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29 *
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30 * @author Lukas Stadler
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31 */
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32 public class CountingProxy<T> implements InvocationHandler {
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33
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34 public static final boolean ENABLED = Boolean.valueOf(System.getProperty("c1x.countcalls"));
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35
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36 private T delegate;
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37
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38 private Map<Method, Long> calls = new HashMap<Method, Long>();
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39
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40 public CountingProxy(T delegate) {
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41 assert ENABLED;
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42 System.out.println("Counting proxy for " + delegate.getClass().getSimpleName() + " created");
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43 this.delegate = delegate;
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44 proxies.add(this);
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45 }
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46
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47 @Override
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48 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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49 int argCount = args == null ? 0 : args.length;
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50 if (method.getParameterTypes().length != argCount) {
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51 throw new RuntimeException("wrong parameter count");
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52 }
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53 final Object result;
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54 long count = calls.containsKey(method) ? calls.get(method) : 0;
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55 calls.put(method, count + 1);
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56 try {
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57 if (args == null) {
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58 result = method.invoke(delegate);
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59 } else {
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60 result = method.invoke(delegate, args);
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61 }
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62 } catch (InvocationTargetException e) {
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63 throw e.getCause();
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64 }
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65 return result;
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66 }
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67
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68 public static <T> T getProxy(Class<T> interf, T delegate) {
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69 Object obj = Proxy.newProxyInstance(interf.getClassLoader(), new Class[] {interf}, new CountingProxy<T>(delegate));
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70 return interf.cast(obj);
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71 }
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72
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73 private static ArrayList<CountingProxy> proxies = new ArrayList<CountingProxy>();
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74
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75 static {
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76 if (ENABLED) {
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77 Runtime.getRuntime().addShutdownHook(new Thread() {
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78
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79 @Override
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80 public void run() {
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81 for (CountingProxy proxy : proxies) {
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82 proxy.print();
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83 }
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84 }
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85 });
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86 }
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87 }
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88
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89 protected void print() {
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90 long sum = 0;
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91 for (Map.Entry<Method, Long> entry : calls.entrySet()) {
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92 Method method = entry.getKey();
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93 long count = entry.getValue();
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94 sum += count;
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95 System.out.println(delegate.getClass().getSimpleName() + "." + method.getName() + ": " + count);
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96 }
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97 System.out.println(delegate.getClass().getSimpleName() + " calls: " + sum);
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98 }
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99 }