0N/A/*
2362N/A * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
0N/A *
0N/A * Redistribution and use in source and binary forms, with or without
0N/A * modification, are permitted provided that the following conditions
0N/A * are met:
0N/A *
0N/A * - Redistributions of source code must retain the above copyright
0N/A * notice, this list of conditions and the following disclaimer.
0N/A *
0N/A * - Redistributions in binary form must reproduce the above copyright
0N/A * notice, this list of conditions and the following disclaimer in the
0N/A * documentation and/or other materials provided with the distribution.
0N/A *
2362N/A * - Neither the name of Oracle nor the names of its
0N/A * contributors may be used to endorse or promote products derived
0N/A * from this software without specific prior written permission.
0N/A *
0N/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
0N/A * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
0N/A * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
0N/A * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
0N/A * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
0N/A * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
0N/A * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
0N/A * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0N/A * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
0N/A * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0N/A * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0N/A */
0N/A
4378N/A/*
4378N/A * This source code is provided to illustrate the usage of a given feature
4378N/A * or technique and has been deliberately simplified. Additional steps
4378N/A * required for a production-quality application, such as security checks,
4378N/A * input validation and proper error handling, might not be present in
4378N/A * this sample code.
4378N/A */
4378N/A
4378N/A
0N/A
0N/A/* Java class to hold static methods which will be called in byte code
0N/A * injections of all class files.
0N/A */
0N/A
0N/Apublic class Mtrace {
0N/A
0N/A /* Master switch that activates methods. */
0N/A
0N/A private static int engaged = 0;
0N/A
0N/A /* At the very beginning of every method, a call to method_entry()
0N/A * is injected.
0N/A */
0N/A
0N/A private static native void _method_entry(Object thr, int cnum, int mnum);
0N/A public static void method_entry(int cnum, int mnum)
0N/A {
0N/A if ( engaged != 0 ) {
0N/A _method_entry(Thread.currentThread(), cnum, mnum);
0N/A }
0N/A }
0N/A
0N/A /* Before any of the return bytecodes, a call to method_exit()
0N/A * is injected.
0N/A */
0N/A
0N/A private static native void _method_exit(Object thr, int cnum, int mnum);
0N/A public static void method_exit(int cnum, int mnum)
0N/A {
0N/A if ( engaged != 0 ) {
0N/A _method_exit(Thread.currentThread(), cnum, mnum);
0N/A }
0N/A }
0N/A
0N/A}