J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * - Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * - Neither the name of Sun Microsystems nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived |
| 17 | * from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | package com.sun.demo.jvmti.hprof; |
| 33 | |
| 34 | /* This class and it's methods are used by hprof when injecting bytecodes |
| 35 | * into class file images. |
| 36 | * See the directory src/share/demo/jvmti/hprof and the file README.txt |
| 37 | * for more details. |
| 38 | */ |
| 39 | |
| 40 | public class Tracker { |
| 41 | |
| 42 | /* Master switch that activates calls to native functions. */ |
| 43 | |
| 44 | private static int engaged = 0; |
| 45 | |
| 46 | /* To track memory allocated, we need to catch object init's and arrays. */ |
| 47 | |
| 48 | /* At the beginning of java.jang.Object.<init>(), a call to |
| 49 | * Tracker.ObjectInit() is injected. |
| 50 | */ |
| 51 | |
| 52 | private static native void nativeObjectInit(Object thr, Object obj); |
| 53 | |
| 54 | public static void ObjectInit(Object obj) |
| 55 | { |
| 56 | if ( engaged != 0 ) { |
| 57 | nativeObjectInit(Thread.currentThread(), obj); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | /* Immediately following any of the newarray bytecodes, a call to |
| 62 | * Tracker.NewArray() is injected. |
| 63 | */ |
| 64 | |
| 65 | private static native void nativeNewArray(Object thr, Object obj); |
| 66 | |
| 67 | public static void NewArray(Object obj) |
| 68 | { |
| 69 | if ( engaged != 0 ) { |
| 70 | nativeNewArray(Thread.currentThread(), obj); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /* For cpu time spent in methods, we need to inject for every method. */ |
| 75 | |
| 76 | /* At the very beginning of every method, a call to |
| 77 | * Tracker.CallSite() is injected. |
| 78 | */ |
| 79 | |
| 80 | private static native void nativeCallSite(Object thr, int cnum, int mnum); |
| 81 | |
| 82 | public static void CallSite(int cnum, int mnum) |
| 83 | { |
| 84 | if ( engaged != 0 ) { |
| 85 | nativeCallSite(Thread.currentThread(), cnum, mnum); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | /* Before any of the return bytecodes, a call to |
| 90 | * Tracker.ReturnSite() is injected. |
| 91 | */ |
| 92 | |
| 93 | private static native void nativeReturnSite(Object thr, int cnum, int mnum); |
| 94 | |
| 95 | public static void ReturnSite(int cnum, int mnum) |
| 96 | { |
| 97 | if ( engaged != 0 ) { |
| 98 | nativeReturnSite(Thread.currentThread(), cnum, mnum); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | } |