Mercurial > hg > truffle
diff graal/Runtime/src/com/sun/hotspot/c1x/logging/CountingProxy.java @ 2297:099e697d8934
Renaming c1x4hotspotsrc => graal and HotSpotVM => Runtime
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 22 Apr 2011 15:08:53 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Runtime/src/com/sun/hotspot/c1x/logging/CountingProxy.java Fri Apr 22 15:08:53 2011 +0200 @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved. + * + * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product + * that is described in this document. In particular, and without limitation, these intellectual property + * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or + * more additional patents or pending patent applications in the U.S. and in other countries. + * + * U.S. Government Rights - Commercial software. Government users are subject to the Sun + * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its + * supplements. + * + * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or + * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks + * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the + * U.S. and other countries. + * + * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open + * Company, Ltd. + */ +package com.sun.hotspot.c1x.logging; + +import java.lang.reflect.*; +import java.util.*; + +import com.sun.hotspot.c1x.server.*; + +/** + * A java.lang.reflect proxy that hierarchically logs all method invocations along with their parameters and return + * values. + * + * @author Lukas Stadler + */ +public class CountingProxy<T> implements InvocationHandler { + + public static final boolean ENABLED = Boolean.valueOf(System.getProperty("c1x.countcalls")); + + private T delegate; + + private Map<Method, Long> calls = new HashMap<Method, Long>(); + + public CountingProxy(T delegate) { + assert ENABLED; + System.out.println("Counting proxy for " + delegate.getClass().getSimpleName() + " created"); + this.delegate = delegate; + proxies.add(this); + } + + @Override + public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { + int argCount = args == null ? 0 : args.length; + if (method.getParameterTypes().length != argCount) { + throw new RuntimeException("wrong parameter count"); + } + final Object result; + long count = calls.containsKey(method) ? calls.get(method) : 0; + calls.put(method, count + 1); + try { + if (args == null) { + result = method.invoke(delegate); + } else { + result = method.invoke(delegate, args); + } + } catch (InvocationTargetException e) { + throw e.getCause(); + } + return result; + } + + public static <T> T getProxy(Class<T> interf, T delegate) { + Class<?>[] interfaces = ReplacingStreams.getAllInterfaces(delegate.getClass()); + Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new CountingProxy<T>(delegate)); + return interf.cast(obj); + } + + private static ArrayList<CountingProxy> proxies = new ArrayList<CountingProxy>(); + + static { + if (ENABLED) { + Runtime.getRuntime().addShutdownHook(new Thread() { + + @Override + public void run() { + for (CountingProxy proxy : proxies) { + proxy.print(); + } + } + }); + } + } + + protected void print() { + long sum = 0; + for (Map.Entry<Method, Long> entry : calls.entrySet()) { + Method method = entry.getKey(); + long count = entry.getValue(); + sum += count; + System.out.println(delegate.getClass().getSimpleName() + "." + method.getName() + ": " + count); + } + System.out.println(delegate.getClass().getSimpleName() + " calls: " + sum); + } +}