1 /*

     2  * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.jfr.internal.instrument;

    27 

    28 import java.io.IOException;

    29 import java.net.InetAddress;

    30 

    31 import jdk.jfr.events.SocketReadEvent;

    32 

    33 /**

    34  * See {@link JITracer} for an explanation of this code.

    35  */

    36 @JIInstrumentationTarget("java.net.SocketInputStream")

    37 @JITypeMapping(from = "jdk.jfr.internal.instrument.SocketInputStreamInstrumentor$AbstractPlainSocketImpl",

    38             to = "java.net.AbstractPlainSocketImpl")

    39 final class SocketInputStreamInstrumentor {

    40 

    41     private SocketInputStreamInstrumentor() {

    42     }

    43 

    44     @SuppressWarnings("deprecation")

    45     @JIInstrumentationMethod

    46     int read(byte b[], int off, int length, int timeout) throws IOException {

    47         SocketReadEvent event = SocketReadEvent.EVENT.get();

    48         if (!event.isEnabled()) {

    49             return read(b, off, length, timeout);

    50         }

    51         int bytesRead = 0;

    52         try {

    53             event.begin();

    54             bytesRead = read(b, off, length, timeout);

    55         } finally {

    56             event.end();

    57             if (event.shouldCommit()) {

    58                 String hostString  = impl.address.toString();

    59                 int delimiterIndex = hostString.lastIndexOf('/');

    60 

    61                 event.host      = hostString.substring(0, delimiterIndex);

    62                 event.address   = hostString.substring(delimiterIndex + 1);

    63                 event.port      = impl.port;

    64                 if (bytesRead < 0) {

    65                     event.endOfStream = true;

    66                 } else {

    67                     event.bytesRead = bytesRead;

    68                 }

    69                 event.timeout   = timeout;

    70 

    71                 event.commit();

    72                 event.reset();

    73             }

    74         }

    75         return bytesRead;

    76     }

    77 

    78     private AbstractPlainSocketImpl impl = null;

    79 

    80     void silenceFindBugsUnwrittenField(InetAddress dummy) {

    81         impl.address = dummy;

    82     }

    83 

    84     static class AbstractPlainSocketImpl {

    85         InetAddress address;

    86         int port;

    87     }

    88 }