jdk8-mips64-public/hotspot: src/share/vm/interpreter/interpreter.hpp@8c95980d0b66

     1 /*

     2  * Copyright (c) 1997, 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.

     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  */

    25 /*

    26  * This file has been modified by Loongson Technology in 2015. These

    27  * modifications are Copyright (c) 2015 Loongson Technology, and are made

    28  * available on the same license terms set forth above.

    29  */

    31 #ifndef SHARE_VM_INTERPRETER_INTERPRETER_HPP

    32 #define SHARE_VM_INTERPRETER_INTERPRETER_HPP

    34 #include "code/stubs.hpp"

    35 #include "interpreter/cppInterpreter.hpp"

    36 #include "interpreter/templateInterpreter.hpp"

    37 #ifdef TARGET_ARCH_zero

    38 # include "entry_zero.hpp"

    39 #endif

    41 // This file contains the platform-independent parts

    42 // of the interpreter and the interpreter generator.

    44 //------------------------------------------------------------------------------------------------------------------------

    45 // An InterpreterCodelet is a piece of interpreter code. All

    46 // interpreter code is generated into little codelets which

    47 // contain extra information for debugging and printing purposes.

    49 class InterpreterCodelet: public Stub {

    50   friend class VMStructs;

    51  private:

    52   int         _size;                             // the size in bytes

    53   const char* _description;                      // a description of the codelet, for debugging & printing

    54   Bytecodes::Code _bytecode;                     // associated bytecode if any

    55   DEBUG_ONLY(CodeStrings _strings;)              // Comments for annotating assembler output.

    57  public:

    58   // Initialization/finalization

    59   void    initialize(int size,

    60                      CodeStrings& strings)       { _size = size;

    61                                                    DEBUG_ONLY(::new(&_strings) CodeStrings();)

    62                                                    DEBUG_ONLY(_strings.assign(strings);) }

    63   void    finalize()                             { ShouldNotCallThis(); }

    65   // General info/converters

    66   int     size() const                           { return _size; }

    67   static  int code_size_to_size(int code_size)   { return round_to(sizeof(InterpreterCodelet), CodeEntryAlignment) + code_size; }

    69   // Code info

    70   address code_begin() const                     { return (address)this + round_to(sizeof(InterpreterCodelet), CodeEntryAlignment); }

    71   address code_end() const                       { return (address)this + size(); }

    73   // Debugging

    74   void    verify();

    75   void    print_on(outputStream* st) const;

    76   void    print() const { print_on(tty); }

    78   // Interpreter-specific initialization

    79   void    initialize(const char* description, Bytecodes::Code bytecode);

    81   // Interpreter-specific attributes

    82   int         code_size() const                  { return code_end() - code_begin(); }

    83   const char* description() const                { return _description; }

    84   Bytecodes::Code bytecode() const               { return _bytecode; }

    85 };

    87 // Define a prototype interface

    88 DEF_STUB_INTERFACE(InterpreterCodelet);

    91 //------------------------------------------------------------------------------------------------------------------------

    92 // A CodeletMark serves as an automatic creator/initializer for Codelets

    93 // (As a subclass of ResourceMark it automatically GC's the allocated

    94 // code buffer and assemblers).

    96 class CodeletMark: ResourceMark {

    97  private:

    98   InterpreterCodelet*         _clet;

    99   InterpreterMacroAssembler** _masm;

   100   CodeBuffer                  _cb;

   102   int codelet_size() {

   103     // Request the whole code buffer (minus a little for alignment).

   104     // The commit call below trims it back for each codelet.

   105     int codelet_size = AbstractInterpreter::code()->available_space() - 2*K;

   107     // Guarantee there's a little bit of code space left.

   108     guarantee (codelet_size > 0 && (size_t)codelet_size >  2*K,

   109                "not enough space for interpreter generation");

   111     return codelet_size;

   112   }

   114  public:

   115   CodeletMark(

   116     InterpreterMacroAssembler*& masm,

   117     const char* description,

   118     Bytecodes::Code bytecode = Bytecodes::_illegal):

   119     _clet((InterpreterCodelet*)AbstractInterpreter::code()->request(codelet_size())),

   120     _cb(_clet->code_begin(), _clet->code_size())

   122   { // request all space (add some slack for Codelet data)

   123     assert (_clet != NULL, "we checked not enough space already");

   125     // initialize Codelet attributes

   126     _clet->initialize(description, bytecode);

   127     // create assembler for code generation

   128     masm  = new InterpreterMacroAssembler(&_cb);

   129     _masm = &masm;

   130   }

   132   ~CodeletMark() {

   133     // align so printing shows nop's instead of random code at the end (Codelets are aligned)

   134     (*_masm)->align(wordSize);

   135     // make sure all code is in code buffer

   136     (*_masm)->flush();

   139     // commit Codelet

   140     AbstractInterpreter::code()->commit((*_masm)->code()->pure_insts_size(), (*_masm)->code()->strings());

   141     // make sure nobody can use _masm outside a CodeletMark lifespan

   142     *_masm = NULL;

   143   }

   144 };

   146 // Wrapper classes to produce Interpreter/InterpreterGenerator from either

   147 // the c++ interpreter or the template interpreter.

   149 class Interpreter: public CC_INTERP_ONLY(CppInterpreter) NOT_CC_INTERP(TemplateInterpreter) {

   151   public:

   152   // Debugging/printing

   153   static InterpreterCodelet* codelet_containing(address pc)     { return (InterpreterCodelet*)_code->stub_containing(pc); }

   154 #ifdef TARGET_ARCH_x86

   155 # include "interpreter_x86.hpp"

   156 #endif

   157 #ifdef TARGET_ARCH_mips

   158 # include "interpreter_mips.hpp"

   159 #endif

   160 #ifdef TARGET_ARCH_sparc

   161 # include "interpreter_sparc.hpp"

   162 #endif

   163 #ifdef TARGET_ARCH_zero

   164 # include "interpreter_zero.hpp"

   165 #endif

   166 #ifdef TARGET_ARCH_arm

   167 # include "interpreter_arm.hpp"

   168 #endif

   169 #ifdef TARGET_ARCH_ppc

   170 # include "interpreter_ppc.hpp"

   171 #endif

   173 };

   175 #endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP

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