Source code file content

hg / samples / Classload.java

/*
 * Copyright 2008-2010 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.btrace.samples;

import static com.sun.btrace.BTraceUtils.*;
import com.sun.btrace.annotations.*;

/**
 * A simple BTrace program that prints stack trace
 * whenever a class is loaded by a user-defined
 * class loader. We insert a return point probe in
 * ClassLoader.defineClass method to detect successful
 * class load.
 */
@BTrace public class Classload {
   @OnMethod(
     clazz="+java.lang.ClassLoader", 
     method="defineClass",
     location=@Location(Kind.RETURN)
   )   
   public static void defineclass(@Return Class cl) {
       println(Strings.strcat("loaded ", Reflective.name(cl)));
       Threads.jstack();
       println("==========================");
   }
}