jdk8-mips64-public/hotspot: src/share/vm/memory/generationSpec.hpp@09d00c18e323

     1 /*

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     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

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     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  *

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

    18  *

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    25 #ifndef SHARE_VM_MEMORY_GENERATIONSPEC_HPP

    26 #define SHARE_VM_MEMORY_GENERATIONSPEC_HPP

    28 #include "memory/generation.hpp"

    29 #include "memory/permGen.hpp"

    31 // The specification of a generation.  This class also encapsulates

    32 // some generation-specific behavior.  This is done here rather than as a

    33 // virtual function of Generation because these methods are needed in

    34 // initialization of the Generations.

    35 class GenerationSpec : public CHeapObj {

    36   friend class VMStructs;

    37 private:

    38   Generation::Name _name;

    39   size_t           _init_size;

    40   size_t           _max_size;

    42 public:

    43   GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) {

    44     _name = name;

    45     _init_size = init_size;

    46     _max_size = max_size;

    47   }

    49   Generation* init(ReservedSpace rs, int level, GenRemSet* remset);

    51   // Accessors

    52   Generation::Name name()        const { return _name; }

    53   size_t init_size()             const { return _init_size; }

    54   void set_init_size(size_t size)      { _init_size = size; }

    55   size_t max_size()              const { return _max_size; }

    56   void set_max_size(size_t size)       { _max_size = size; }

    58   // Alignment

    59   void align(size_t alignment) {

    60     set_init_size(align_size_up(init_size(), alignment));

    61     set_max_size(align_size_up(max_size(), alignment));

    62   }

    64   // Return the number of regions contained in the generation which

    65   // might need to be independently covered by a remembered set.

    66   virtual int n_covered_regions() const { return 1; }

    67 };

    69 typedef GenerationSpec* GenerationSpecPtr;

    71 // The specification of a permanent generation. This class is very

    72 // similar to GenerationSpec in use. Due to PermGen's not being a

    73 // true Generation, we cannot combine the spec classes either.

    74 class PermanentGenerationSpec : public CHeapObj {

    75   friend class VMStructs;

    76 private:

    77   PermGen::Name    _name;

    78   size_t           _init_size;

    79   size_t           _max_size;

    80   size_t           _read_only_size;

    81   size_t           _read_write_size;

    82   size_t           _misc_data_size;

    83   size_t           _misc_code_size;

    84   bool             _enable_shared_spaces;

    86   enum {

    87     _n_spaces = 2

    88   };

    90 public:

    91   PermanentGenerationSpec(PermGen::Name name, size_t init_size,

    92                           size_t max_size, size_t read_only_size,

    93                           size_t read_write_size, size_t misc_data_size,

    94                           size_t misc_code_size);

    96   PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset);

    98   void disable_sharing() {

    99     _enable_shared_spaces = false;

   100     _read_only_size = 0;

   101     _read_write_size = 0;

   102     _misc_data_size = 0;

   103     _misc_code_size = 0;

   104   }

   106   // Accessors

   107   PermGen::Name name()           const { return _name; }

   108   size_t init_size()             const { return _init_size; }

   109   void set_init_size(size_t size)      { _init_size = size; }

   111   // Max size for user DOES NOT include shared spaces.

   112   // Max size for space allocation DOES include shared spaces.

   113   size_t max_size() const {

   114     return _max_size + _read_only_size + _read_write_size;

   115   }

   117   // Need one covered region for the main space, and one for the shared

   118   // spaces (together).

   119   int n_covered_regions() const { return 2; }

   121   void align(size_t alignment);

   123   size_t read_only_size() const { return _read_only_size; }

   124   size_t read_write_size() const { return _read_write_size; }

   125   size_t misc_data_size() const { return _misc_data_size; }

   126   size_t misc_code_size() const { return _misc_code_size; }

   127   bool enable_shared_spaces()    const { return _enable_shared_spaces; }

   128 };

   130 #endif // SHARE_VM_MEMORY_GENERATIONSPEC_HPP

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