Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

  * have any questions.

  *

  */

 // This file contains the platform-independent parts

 // of the template interpreter and the template interpreter generator.

 #ifndef CC_INTERP

 //------------------------------------------------------------------------------------------------------------------------

 // A little wrapper class to group tosca-specific entry points into a unit.

 // (tosca = Top-Of-Stack CAche)

 class EntryPoint VALUE_OBJ_CLASS_SPEC {

  private:

   address _entry[number_of_states];

  public:

   // Construction

   EntryPoint();

   EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry);

   // Attributes

   address entry(TosState state) const;                // return target address for a given tosca state

   void    set_entry(TosState state, address entry);   // set    target address for a given tosca state

   void    print();

   // Comparison

   bool operator == (const EntryPoint& y);             // for debugging only

 };

 //------------------------------------------------------------------------------------------------------------------------

 // A little wrapper class to group tosca-specific dispatch tables into a unit.

 class DispatchTable VALUE_OBJ_CLASS_SPEC {

  public:

   enum { length = 1 << BitsPerByte };                 // an entry point for each byte value (also for undefined bytecodes)

  private:

   address _table[number_of_states][length];           // dispatch tables, indexed by tosca and bytecode

  public:

   // Attributes

   EntryPoint entry(int i) const;                      // return entry point for a given bytecode i

   void       set_entry(int i, EntryPoint& entry);     // set    entry point for a given bytecode i

   address*   table_for(TosState state)          { return _table[state]; }

   address*   table_for()                        { return table_for((TosState)0); }

   int        distance_from(address *table)      { return table - table_for(); }

   int        distance_from(TosState state)      { return distance_from(table_for(state)); }

   // Comparison

   bool operator == (DispatchTable& y);                // for debugging only

 };

 class TemplateInterpreter: public AbstractInterpreter {

   friend class VMStructs;

   friend class InterpreterMacroAssembler;

   friend class TemplateInterpreterGenerator;

   friend class InterpreterGenerator;

   friend class TemplateTable;

   // friend class Interpreter;

  public:

   enum MoreConstants {

     number_of_return_entries  = 9,                              // number of return entry points

     number_of_deopt_entries   = 9,                              // number of deoptimization entry points

     number_of_return_addrs    = 9                              // number of return addresses

   };

  protected:

   static address    _throw_ArrayIndexOutOfBoundsException_entry;

   static address    _throw_ArrayStoreException_entry;

   static address    _throw_ArithmeticException_entry;

   static address    _throw_ClassCastException_entry;

   static address    _throw_WrongMethodType_entry;

   static address    _throw_NullPointerException_entry;

   static address    _throw_exception_entry;

   static address    _throw_StackOverflowError_entry;

   static address    _remove_activation_entry;                   // continuation address if an exception is not handled by current frame

 #ifdef HOTSWAP

   static address    _remove_activation_preserving_args_entry;   // continuation address when current frame is being popped

 #endif // HOTSWAP

 #ifndef PRODUCT

   static EntryPoint _trace_code;

 #endif // !PRODUCT

   static EntryPoint _return_entry[number_of_return_entries];    // entry points to return to from a call

   static EntryPoint _earlyret_entry;                            // entry point to return early from a call

   static EntryPoint _deopt_entry[number_of_deopt_entries];      // entry points to return to from a deoptimization

   static EntryPoint _continuation_entry;

   static EntryPoint _safept_entry;

   static address    _return_3_addrs_by_index[number_of_return_addrs];     // for invokevirtual   return entries

   static address    _return_5_addrs_by_index[number_of_return_addrs];     // for invokeinterface return entries

   static DispatchTable _active_table;                           // the active    dispatch table (used by the interpreter for dispatch)

   static DispatchTable _normal_table;                           // the normal    dispatch table (used to set the active table in normal mode)

   static DispatchTable _safept_table;                           // the safepoint dispatch table (used to set the active table for safepoints)

   static address       _wentry_point[DispatchTable::length];    // wide instructions only (vtos tosca always)

  public:

   // Initialization/debugging

   static void       initialize();

   // this only returns whether a pc is within generated code for the interpreter.

   static bool       contains(address pc)                        { return _code != NULL && _code->contains(pc); }

  public:

   static address    remove_activation_early_entry(TosState state) { return _earlyret_entry.entry(state); }

 #ifdef HOTSWAP

   static address    remove_activation_preserving_args_entry()   { return _remove_activation_preserving_args_entry; }

 #endif // HOTSWAP

   static address    remove_activation_entry()                   { return _remove_activation_entry; }

   static address    throw_exception_entry()                     { return _throw_exception_entry; }

   static address    throw_ArithmeticException_entry()           { return _throw_ArithmeticException_entry; }

   static address    throw_WrongMethodType_entry()               { return _throw_WrongMethodType_entry; }

   static address    throw_NullPointerException_entry()          { return _throw_NullPointerException_entry; }

   static address    throw_StackOverflowError_entry()            { return _throw_StackOverflowError_entry; }

   // Code generation

 #ifndef PRODUCT

   static address    trace_code    (TosState state)              { return _trace_code.entry(state); }

 #endif // !PRODUCT

   static address    continuation  (TosState state)              { return _continuation_entry.entry(state); }

   static address*   dispatch_table(TosState state)              { return _active_table.table_for(state); }

   static address*   dispatch_table()                            { return _active_table.table_for(); }

   static int        distance_from_dispatch_table(TosState state){ return _active_table.distance_from(state); }

   static address*   normal_table(TosState state)                { return _normal_table.table_for(state); }

   static address*   normal_table()                              { return _normal_table.table_for(); }

   // Support for invokes

   static address*   return_3_addrs_by_index_table()             { return _return_3_addrs_by_index; }

   static address*   return_5_addrs_by_index_table()             { return _return_5_addrs_by_index; }

   static int        TosState_as_index(TosState state);          // computes index into return_3_entry_by_index table

   static address    return_entry  (TosState state, int length);

   static address    deopt_entry   (TosState state, int length);

   // Safepoint support

   static void       notice_safepoints();                        // stops the thread when reaching a safepoint

   static void       ignore_safepoints();                        // ignores safepoints

   // Deoptimization support

   static address    continuation_for(methodOop method,

                                      address bcp,

                                      int callee_parameters,

                                      bool is_top_frame,

                                      bool& use_next_mdp);

 #include "incls/_templateInterpreter_pd.hpp.incl"

 };

 #endif // !CC_INTERP