| /* |
| * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package com.sun.demo.jvmti.hprof; |
| |
| /* This class and it's methods are used by hprof when injecting bytecodes |
| * into class file images. |
| * See the directory src/share/demo/jvmti/hprof and the file README.txt |
| * for more details. |
| */ |
| |
| public class Tracker { |
| |
| /* Master switch that activates calls to native functions. */ |
| |
| private static int engaged = 0; |
| |
| /* To track memory allocated, we need to catch object init's and arrays. */ |
| |
| /* At the beginning of java.jang.Object.<init>(), a call to |
| * Tracker.ObjectInit() is injected. |
| */ |
| |
| private static native void nativeObjectInit(Object thr, Object obj); |
| |
| public static void ObjectInit(Object obj) |
| { |
| if ( engaged != 0) { |
| if (obj == null) { |
| throw new IllegalArgumentException("Null object."); |
| } |
| nativeObjectInit(Thread.currentThread(), obj); |
| } |
| } |
| |
| /* Immediately following any of the newarray bytecodes, a call to |
| * Tracker.NewArray() is injected. |
| */ |
| |
| private static native void nativeNewArray(Object thr, Object obj); |
| |
| public static void NewArray(Object obj) |
| { |
| if ( engaged != 0) { |
| if (obj == null) { |
| throw new IllegalArgumentException("Null object."); |
| } |
| nativeNewArray(Thread.currentThread(), obj); |
| } |
| } |
| |
| /* For cpu time spent in methods, we need to inject for every method. */ |
| |
| /* At the very beginning of every method, a call to |
| * Tracker.CallSite() is injected. |
| */ |
| |
| private static native void nativeCallSite(Object thr, int cnum, int mnum); |
| |
| public static void CallSite(int cnum, int mnum) |
| { |
| if ( engaged != 0 ) { |
| if (cnum < 0) { |
| throw new IllegalArgumentException("Negative class index"); |
| } |
| |
| if (mnum < 0) { |
| throw new IllegalArgumentException("Negative method index"); |
| } |
| |
| nativeCallSite(Thread.currentThread(), cnum, mnum); |
| } |
| } |
| |
| /* Before any of the return bytecodes, a call to |
| * Tracker.ReturnSite() is injected. |
| */ |
| |
| private static native void nativeReturnSite(Object thr, int cnum, int mnum); |
| |
| public static void ReturnSite(int cnum, int mnum) |
| { |
| if ( engaged != 0 ) { |
| if (cnum < 0) { |
| throw new IllegalArgumentException("Negative class index"); |
| } |
| |
| if (mnum < 0) { |
| throw new IllegalArgumentException("Negative method index"); |
| } |
| |
| nativeReturnSite(Thread.currentThread(), cnum, mnum); |
| } |
| } |
| |
| } |