/*
* 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 ) {
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 ) {
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 ) {
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 ) {
nativeReturnSite(Thread.currentThread(), cnum, mnum);
}
}
}