Mercurial > hg > truffle
view graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/logging/CountingProxy.java @ 21696:ca140f8c35be
Empty pointer stamps are also non-null.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 03 Jun 2015 14:08:29 +0200 |
parents | d563baeca9df |
children |
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/* * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.jvmci.hotspot.logging; import java.lang.reflect.*; import java.util.*; import java.util.concurrent.*; import java.util.concurrent.atomic.*; import com.oracle.jvmci.debug.*; /** * A java.lang.reflect proxy that hierarchically logs all method invocations along with their * parameters and return values. */ public class CountingProxy<T> implements InvocationHandler { public static final boolean ENABLED = Boolean.valueOf(System.getProperty("jvmci.countcalls")); private T delegate; private ConcurrentHashMap<Method, AtomicLong> calls = new ConcurrentHashMap<>(); public CountingProxy(T delegate) { assert ENABLED; TTY.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; if (!calls.containsKey(method)) { calls.putIfAbsent(method, new AtomicLong(0)); } AtomicLong count = calls.get(method); count.incrementAndGet(); 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 = ProxyUtil.getAllInterfaces(delegate.getClass()); Object obj = Proxy.newProxyInstance(interf.getClassLoader(), interfaces, new CountingProxy<>(delegate)); return interf.cast(obj); } private static ArrayList<CountingProxy<?>> proxies = new ArrayList<>(); 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, AtomicLong> entry : calls.entrySet()) { Method method = entry.getKey(); long count = entry.getValue().get(); sum += count; TTY.println(delegate.getClass().getSimpleName() + "." + method.getName() + ": " + count); } TTY.println(delegate.getClass().getSimpleName() + " calls: " + sum); } }