1 /*
   2  * Copyright (c) 2005, 2006, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 # include "incls/_precompiled.incl"
  26 # include "incls/_attachListener_windows.cpp.incl"



  27 
  28 #include <windows.h>
  29 #include <signal.h>             // SIGBREAK
  30 
  31 // The AttachListener thread services a queue of operations. It blocks in the dequeue
  32 // function until an operation is enqueued. A client enqueues an operation by creating
  33 // a thread in this process using the Win32 CreateRemoteThread function. That thread
  34 // executes a small stub generated by the client. The stub invokes the
  35 // JVM_EnqueueOperation function which checks the operation parameters and enqueues
  36 // the operation to the queue serviced by the attach listener. The thread created by
  37 // the client is a native thread and is restricted to a single page of stack. To keep
  38 // it simple operations are pre-allocated at initialization time. An enqueue thus
  39 // takes a preallocated operation, populates the operation parameters, adds it to
  40 // queue and wakes up the attach listener.
  41 //
  42 // When an operation has completed the attach listener is required to send the
  43 // operation result and any result data to the client. In this implementation the
  44 // client is a pipe server. In the enqueue operation it provides the name of pipe
  45 // to this process. When the operation is completed this process opens the pipe and
  46 // sends the result and output back to the client. Note that writing to the pipe

   1 /*
   2  * Copyright (c) 2005, 2010, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "runtime/interfaceSupport.hpp"
  27 #include "runtime/os.hpp"
  28 #include "services/attachListener.hpp"
  29 #include "services/dtraceAttacher.hpp"
  30 
  31 #include <windows.h>
  32 #include <signal.h>             // SIGBREAK
  33 
  34 // The AttachListener thread services a queue of operations. It blocks in the dequeue
  35 // function until an operation is enqueued. A client enqueues an operation by creating
  36 // a thread in this process using the Win32 CreateRemoteThread function. That thread
  37 // executes a small stub generated by the client. The stub invokes the
  38 // JVM_EnqueueOperation function which checks the operation parameters and enqueues
  39 // the operation to the queue serviced by the attach listener. The thread created by
  40 // the client is a native thread and is restricted to a single page of stack. To keep
  41 // it simple operations are pre-allocated at initialization time. An enqueue thus
  42 // takes a preallocated operation, populates the operation parameters, adds it to
  43 // queue and wakes up the attach listener.
  44 //
  45 // When an operation has completed the attach listener is required to send the
  46 // operation result and any result data to the client. In this implementation the
  47 // client is a pipe server. In the enqueue operation it provides the name of pipe
  48 // to this process. When the operation is completed this process opens the pipe and
  49 // sends the result and output back to the client. Note that writing to the pipe