1 /*
   2  * Copyright (c) 2008, 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 class decode_env;
  26 
  27 // The disassembler prints out assembly code annotated
  28 // with Java specific information.
  29 
  30 class Disassembler {
  31   friend class decode_env;
  32  private:
  33   // this is the type of the dll entry point:
  34   typedef void* (*decode_func)(void* start, void* end,
  35                                void* (*event_callback)(void*, const char*, void*),
  36                                void* event_stream,
  37                                int (*printf_callback)(void*, const char*, ...),
  38                                void* printf_stream,
  39                                const char* options);
  40   // points to the library.
  41   static void*    _library;
  42   // bailout
  43   static bool     _tried_to_load_library;
  44   // points to the decode function.
  45   static decode_func _decode_instructions;
  46   // tries to load library and return whether it succedded.
  47   static bool load_library();
  48 
  49   // Machine dependent stuff
  50   #include "incls/_disassembler_pd.hpp.incl"
  51 
  52  public:
  53   static bool can_decode() {
  54     return (_decode_instructions != NULL) || load_library();
  55   }
  56   static void decode(CodeBlob *cb,               outputStream* st = NULL);
  57   static void decode(nmethod* nm,                outputStream* st = NULL);
  58   static void decode(address begin, address end, outputStream* st = NULL);
  59 };