jdk8-mips64-public/hotspot: src/share/vm/ci/ciObjectFactory.hpp@b4776199210f

6943485: JVMTI always on capabilities change code generation too much
Reviewed-by: twisti, dcubed

     1 /*

     2  * Copyright 1999-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

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

    21  * have any questions.

    22  *

    23  */

    25 // ciObjectFactory

    26 //

    27 // This class handles requests for the creation of new instances

    28 // of ciObject and its subclasses.  It contains a caching mechanism

    29 // which ensures that for each oop, at most one ciObject is created.

    30 // This invariant allows efficient implementation of ciObject.

    31 class ciObjectFactory : public ResourceObj {

    32 private:

    33   static volatile bool _initialized;

    34   static GrowableArray<ciObject*>* _shared_ci_objects;

    35   static ciSymbol*                 _shared_ci_symbols[];

    36   static int                       _shared_ident_limit;

    38   Arena*                    _arena;

    39   GrowableArray<ciObject*>* _ci_objects;

    40   GrowableArray<ciMethod*>* _unloaded_methods;

    41   GrowableArray<ciKlass*>* _unloaded_klasses;

    42   GrowableArray<ciReturnAddress*>* _return_addresses;

    43   int                       _next_ident;

    45 public:

    46   struct NonPermObject : public ResourceObj {

    47     ciObject*      _object;

    48     NonPermObject* _next;

    50     inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);

    51     ciObject*     object()  { return _object; }

    52     NonPermObject* &next()  { return _next; }

    53   };

    54 private:

    55   enum { NON_PERM_BUCKETS = 61 };

    56   NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];

    57   int _non_perm_count;

    59   int find(oop key, GrowableArray<ciObject*>* objects);

    60   bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects);

    61   void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects);

    62   ciObject* create_new_object(oop o);

    63   static bool is_equal(NonPermObject* p, oop key) {

    64     return p->object()->get_oop() == key;

    65   }

    67   NonPermObject* &find_non_perm(oop key);

    68   void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);

    70   void init_ident_of(ciObject* obj);

    72   Arena* arena() { return _arena; }

    74   void print_contents_impl();

    76 public:

    77   static bool is_initialized() { return _initialized; }

    79   static void initialize();

    80   void init_shared_objects();

    82   ciObjectFactory(Arena* arena, int expected_size);

    85   // Get the ciObject corresponding to some oop.

    86   ciObject* get(oop key);

    88   // Get the ciSymbol corresponding to one of the vmSymbols.

    89   static ciSymbol* vm_symbol_at(int index);

    91   // Get the ciMethod representing an unloaded/unfound method.

    92   ciMethod* get_unloaded_method(ciInstanceKlass* holder,

    93                                 ciSymbol*        name,

    94                                 ciSymbol*        signature);

    96   // Get a ciKlass representing an unloaded klass.

    97   ciKlass* get_unloaded_klass(ciKlass* accessing_klass,

    98                               ciSymbol* name,

    99                               bool create_if_not_found);

   102   // Get the ciMethodData representing the methodData for a method

   103   // with none.

   104   ciMethodData* get_empty_methodData();

   106   ciReturnAddress* get_return_address(int bci);

   108   void print_contents();

   109   void print();

   110 };

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