1 /*
   2  * Copyright (c) 1997, 2007, 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 #ifdef CC_INTERP
  26 
  27 // This file contains the platform-independent parts
  28 // of the c++ interpreter
  29 
  30 class CppInterpreter: public AbstractInterpreter {
  31   friend class VMStructs;
  32   friend class Interpreter; // contains()
  33   friend class InterpreterGenerator; // result handlers
  34   friend class CppInterpreterGenerator; // result handlers
  35  public:
  36 
  37 
  38  protected:
  39 
  40   // tosca result -> stack result
  41   static address    _tosca_to_stack[number_of_result_handlers];  // converts tosca to C++ interpreter stack result
  42   // stack result -> stack result
  43   static address    _stack_to_stack[number_of_result_handlers];  // pass result between C++ interpreter calls
  44   // stack result -> native abi result
  45   static address    _stack_to_native_abi[number_of_result_handlers];  // converts C++ interpreter results to native abi
  46 
  47   // this is to allow frame and only frame to use contains().
  48   friend class      frame;
  49 
  50  public:
  51   // Initialization/debugging
  52   static void       initialize();
  53   // this only returns whether a pc is within generated code for the interpreter.
  54 
  55   // This is a moderately dubious interface for the c++ interpreter. Only
  56   // frame code and debug.cpp should be using it.
  57   static bool       contains(address pc);
  58 
  59  public:
  60 
  61 
  62   // No displatch table to switch so no need for these to do anything special
  63   static void notice_safepoints() {}
  64   static void ignore_safepoints() {}
  65 
  66   static address    native_result_to_tosca()                    { return (address)_native_abi_to_tosca; } // aka result handler
  67   static address    tosca_result_to_stack()                     { return (address)_tosca_to_stack; }
  68   static address    stack_result_to_stack()                     { return (address)_stack_to_stack; }
  69   static address    stack_result_to_native()                    { return (address)_stack_to_native_abi; }
  70 
  71   static address    native_result_to_tosca(int index)           { return _native_abi_to_tosca[index]; } // aka result handler
  72   static address    tosca_result_to_stack(int index)            { return _tosca_to_stack[index]; }
  73   static address    stack_result_to_stack(int index)            { return _stack_to_stack[index]; }
  74   static address    stack_result_to_native(int index)           { return _stack_to_native_abi[index]; }
  75 
  76   static address    return_entry  (TosState state, int length);
  77   static address    deopt_entry   (TosState state, int length);
  78 
  79 #include "incls/_cppInterpreter_pd.hpp.incl"
  80 
  81 };
  82 
  83 #endif // CC_INTERP