125 lines
4.1 KiB
Java
125 lines
4.1 KiB
Java
/*
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* Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Oracle nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.sun.demo.jvmti.hprof;
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/* This class and it's methods are used by hprof when injecting bytecodes
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* into class file images.
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* See the directory src/share/demo/jvmti/hprof and the file README.txt
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* for more details.
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*/
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public class Tracker {
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/* Master switch that activates calls to native functions. */
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private static int engaged = 0;
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/* To track memory allocated, we need to catch object init's and arrays. */
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/* At the beginning of java.jang.Object.<init>(), a call to
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* Tracker.ObjectInit() is injected.
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*/
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private static native void nativeObjectInit(Object thr, Object obj);
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public static void ObjectInit(Object obj)
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{
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if ( engaged != 0) {
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if (obj == null) {
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throw new IllegalArgumentException("Null object.");
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}
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nativeObjectInit(Thread.currentThread(), obj);
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}
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}
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/* Immediately following any of the newarray bytecodes, a call to
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* Tracker.NewArray() is injected.
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*/
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private static native void nativeNewArray(Object thr, Object obj);
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public static void NewArray(Object obj)
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{
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if ( engaged != 0) {
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if (obj == null) {
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throw new IllegalArgumentException("Null object.");
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}
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nativeNewArray(Thread.currentThread(), obj);
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}
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}
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/* For cpu time spent in methods, we need to inject for every method. */
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/* At the very beginning of every method, a call to
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* Tracker.CallSite() is injected.
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*/
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private static native void nativeCallSite(Object thr, int cnum, int mnum);
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public static void CallSite(int cnum, int mnum)
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{
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if ( engaged != 0 ) {
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if (cnum < 0) {
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throw new IllegalArgumentException("Negative class index");
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}
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if (mnum < 0) {
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throw new IllegalArgumentException("Negative method index");
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}
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nativeCallSite(Thread.currentThread(), cnum, mnum);
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}
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}
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/* Before any of the return bytecodes, a call to
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* Tracker.ReturnSite() is injected.
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*/
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private static native void nativeReturnSite(Object thr, int cnum, int mnum);
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public static void ReturnSite(int cnum, int mnum)
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{
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if ( engaged != 0 ) {
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if (cnum < 0) {
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throw new IllegalArgumentException("Negative class index");
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}
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if (mnum < 0) {
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throw new IllegalArgumentException("Negative method index");
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}
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nativeReturnSite(Thread.currentThread(), cnum, mnum);
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}
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}
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}
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