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/*
* Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the Classpath exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.btrace.samples;
import com.sun.btrace.annotations.*;
import static com.sun.btrace.BTraceUtils.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
/**
* This sample prints all files opened for read/write
* by a Java process. Note that if you pass FileDescriptor
* to File{Input/Output}Stream or File{Reader/Writer},
* that is not tracked by this script.
*/
@BTrace public class FileTracker {
@TLS private static String name;
@OnMethod(
clazz="java.io.FileInputStream",
method="<init>"
)
public static void onNewFileInputStream(@Self FileInputStream self, File f) {
name = Strings.str(f);
}
@OnMethod(
clazz="java.io.FileInputStream",
method="<init>",
type="void (java.io.File)",
location=@Location(Kind.RETURN)
)
public static void onNewFileInputStreamReturn() {
if (name != null) {
println("opened for read " + name);
name = null;
}
}
@OnMethod(
clazz="java.io.FileOutputStream",
method="<init>"
)
public static void onNewFileOutputStream(@Self FileOutputStream self, File f, boolean b) {
name = str(f);
}
@OnMethod(
clazz="java.io.FileOutputStream",
method="<init>",
type="void (java.io.File, boolean)",
location=@Location(Kind.RETURN)
)
public static void OnNewFileOutputStreamReturn() {
if (name != null) {
println("opened for write " + name);
name = null;
}
}
}