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.SocketWriteEvent;
  32 
  33 /**
  34  * See {@link JITracer} for an explanation of this code.
  35  */
  36 @JIInstrumentationTarget("java.net.SocketOutputStream")
  37 @JITypeMapping(from = "jdk.jfr.internal.instrument.SocketOutputStreamInstrumentor$AbstractPlainSocketImpl",
  38             to = "java.net.AbstractPlainSocketImpl")
  39 final class SocketOutputStreamInstrumentor {
  40 
  41     private SocketOutputStreamInstrumentor() {
  42     }
  43 
  44     @SuppressWarnings("deprecation")
  45     @JIInstrumentationMethod
  46     private void socketWrite(byte b[], int off, int len) throws IOException {
  47         SocketWriteEvent event = SocketWriteEvent.EVENT.get();
  48         if (!event.isEnabled()) {
  49             socketWrite(b, off, len);
  50             return;
  51         }
  52         int bytesWritten = 0;
  53         try {
  54             event.begin();
  55             socketWrite(b, off, len);
  56             bytesWritten = len;
  57         } finally {
  58             event.end() ;
  59             if (event.shouldCommit()) {
  60                 String hostString  = impl.address.toString();
  61                 int delimiterIndex = hostString.lastIndexOf('/');
  62 
  63                 event.host         = hostString.substring(0, delimiterIndex);
  64                 event.address      = hostString.substring(delimiterIndex + 1);
  65                 event.port         = impl.port;
  66                 event.bytesWritten = bytesWritten < 0 ? 0 : bytesWritten;
  67 
  68                 event.commit();
  69                 event.reset();
  70             }
  71         }
  72     }
  73 
  74     private AbstractPlainSocketImpl impl = null;
  75 
  76     void silenceFindBugsUnwrittenField(InetAddress dummy) {
  77         impl.address = dummy;
  78     }
  79 
  80     static class AbstractPlainSocketImpl {
  81         InetAddress address;
  82         int port;
  83     }
  84 }