jdk8-mips64-public/hotspot: src/share/vm/interpreter/interpreter.hpp@094cbdffa87d

8054292: code comments leak in fastdebug builds
Summary: Added deallocation to destructor; hardened interface against misuse
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 1997, 2013, 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 #ifndef SHARE_VM_INTERPRETER_INTERPRETER_HPP

    26 #define SHARE_VM_INTERPRETER_INTERPRETER_HPP

    28 #include "code/stubs.hpp"

    29 #include "interpreter/cppInterpreter.hpp"

    30 #include "interpreter/templateInterpreter.hpp"

    31 #ifdef ZERO

    32 #ifdef TARGET_ARCH_zero

    33 # include "entry_zero.hpp"

    34 #endif

    35 #endif

    37 // This file contains the platform-independent parts

    38 // of the interpreter and the interpreter generator.

    40 //------------------------------------------------------------------------------------------------------------------------

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

    42 // interpreter code is generated into little codelets which

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

    45 class InterpreterCodelet: public Stub {

    46   friend class VMStructs;

    47  private:

    48   int         _size;                             // the size in bytes

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

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

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

    53  public:

    54   // Initialization/finalization

    55   void    initialize(int size,

    56                      CodeStrings& strings)       { _size = size;

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

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

    59   void    finalize()                             { ShouldNotCallThis(); }

    61   // General info/converters

    62   int     size() const                           { return _size; }

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

    65   // Code info

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

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

    69   // Debugging

    70   void    verify();

    71   void    print_on(outputStream* st) const;

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

    74   // Interpreter-specific initialization

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

    77   // Interpreter-specific attributes

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

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

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

    81 };

    83 // Define a prototype interface

    84 DEF_STUB_INTERFACE(InterpreterCodelet);

    87 //------------------------------------------------------------------------------------------------------------------------

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

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

    90 // code buffer and assemblers).

    92 class CodeletMark: ResourceMark {

    93  private:

    94   InterpreterCodelet*         _clet;

    95   InterpreterMacroAssembler** _masm;

    96   CodeBuffer                  _cb;

    98   int codelet_size() {

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

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

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

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

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

   105                "not enough space for interpreter generation");

   107     return codelet_size;

   108   }

   110  public:

   111   CodeletMark(

   112     InterpreterMacroAssembler*& masm,

   113     const char* description,

   114     Bytecodes::Code bytecode = Bytecodes::_illegal):

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

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

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

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

   121     // initialize Codelet attributes

   122     _clet->initialize(description, bytecode);

   123     // create assembler for code generation

   124     masm  = new InterpreterMacroAssembler(&_cb);

   125     _masm = &masm;

   126   }

   128   ~CodeletMark() {

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

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

   131     // make sure all code is in code buffer

   132     (*_masm)->flush();

   135     // commit Codelet

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

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

   138     *_masm = NULL;

   139   }

   140 };

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

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

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

   147   public:

   148   // Debugging/printing

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

   150 #ifdef TARGET_ARCH_x86

   151 # include "interpreter_x86.hpp"

   152 #endif

   153 #ifdef TARGET_ARCH_sparc

   154 # include "interpreter_sparc.hpp"

   155 #endif

   156 #ifdef TARGET_ARCH_zero

   157 # include "interpreter_zero.hpp"

   158 #endif

   159 #ifdef TARGET_ARCH_arm

   160 # include "interpreter_arm.hpp"

   161 #endif

   162 #ifdef TARGET_ARCH_ppc

   163 # include "interpreter_ppc.hpp"

   164 #endif

   166 };

   168 #endif // SHARE_VM_INTERPRETER_INTERPRETER_HPP

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