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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/logging/CountingProxy.java @ 1434:72cfb36c6bb2

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* enabled all jtt tests * added proxy that counts jni calls * honor hotspot stackshadowpages * constant pool caching * monitor enter/exit * arithmetic stubs (frem, drem, ...) * create stack values for debug info * some doc
author Lukas Stadler <lukas.stadler@oracle.com>
date Thu, 30 Sep 2010 17:19:48 -0700
parents
children 9e5e83ca2259
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1434
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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 that is
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5 * described in this document. In particular, and without limitation, these intellectual property rights may include one
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6 * or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent
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7 * 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 Microsystems, Inc. standard
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10 * license agreement and applicable provisions of the FAR and its supplements.
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11 *
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12 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or registered
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13 * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks are used under license and
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14 * are trademarks or registered trademarks of SPARC International, Inc. in the U.S. and other countries.
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15 *
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16 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open Company, Ltd.
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17 */
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18 package com.sun.hotspot.c1x.logging;
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19
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20 import java.lang.reflect.*;
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21 import java.util.*;
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22
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23 /**
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24 * A java.lang.reflect proxy that hierarchically logs all method invocations along with their parameters and return
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25 * values.
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26 *
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27 * @author Lukas Stadler
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28 */
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29 public class CountingProxy<T> implements InvocationHandler {
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30
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31 public static final boolean ENABLED = Boolean.valueOf(System.getProperty("c1x.countcalls"));
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32
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33 private T delegate;
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34
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35 private Map<Method, Long> calls = new HashMap<Method, Long>();
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36
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37 public CountingProxy(T delegate) {
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38 assert ENABLED;
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39 System.out.println("Counting proxy for " + delegate.getClass().getSimpleName() + " created");
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40 this.delegate = delegate;
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41 proxies.add(this);
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42 }
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43
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44 @Override
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45 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
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46 int argCount = args == null ? 0 : args.length;
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47 if (method.getParameterTypes().length != argCount)
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48 throw new RuntimeException("wrong parameter count");
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49 final Object result;
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50 long count = calls.containsKey(method) ? calls.get(method) : 0;
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51 calls.put(method, count + 1);
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52 try {
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53 if (args == null) {
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54 result = method.invoke(delegate);
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55 } else {
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56 result = method.invoke(delegate, args);
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57 }
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58 } catch (InvocationTargetException e) {
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59 throw e.getCause();
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60 }
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61 return result;
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62 }
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63
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64 public static <T> T getProxy(Class<T> interf, T delegate) {
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65 Object obj = Proxy.newProxyInstance(interf.getClassLoader(), new Class[] { interf}, new CountingProxy<T>(delegate));
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66 return interf.cast(obj);
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67 }
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68
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69 private static ArrayList<CountingProxy> proxies = new ArrayList<CountingProxy>();
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70
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71 static {
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72 if (ENABLED) {
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73 Runtime.getRuntime().addShutdownHook(new Thread() {
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74
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75 @Override
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76 public void run() {
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77 for (CountingProxy proxy : proxies) {
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78 proxy.print();
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79 }
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80 }
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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 protected void print() {
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86 long sum = 0;
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87 for (Map.Entry<Method, Long> entry : calls.entrySet()) {
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88 Method method = entry.getKey();
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89 long count = entry.getValue();
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90 sum += count;
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91 System.out.println(delegate.getClass().getSimpleName() + "." + method.getName() + ": " + count);
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92 }
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93 System.out.println(delegate.getClass().getSimpleName() + " calls: " + sum);
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94 }
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95 }