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 }