jdk8-mips64-public/hotspot: src/share/vm/ci/ciObjectFactory.hpp@8012aa3ccede

4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed

     1 /*

     2  * Copyright (c) 1999, 2010, 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_CI_CIOBJECTFACTORY_HPP

    26 #define SHARE_VM_CI_CIOBJECTFACTORY_HPP

    28 #include "ci/ciClassList.hpp"

    29 #include "ci/ciObject.hpp"

    30 #include "utilities/growableArray.hpp"

    32 // ciObjectFactory

    33 //

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

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

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

    37 // This invariant allows efficient implementation of ciObject.

    38 class ciObjectFactory : public ResourceObj {

    39 private:

    40   static volatile bool _initialized;

    41   static GrowableArray<ciObject*>* _shared_ci_objects;

    42   static ciSymbol*                 _shared_ci_symbols[];

    43   static int                       _shared_ident_limit;

    45   Arena*                    _arena;

    46   GrowableArray<ciObject*>* _ci_objects;

    47   GrowableArray<ciMethod*>* _unloaded_methods;

    48   GrowableArray<ciKlass*>* _unloaded_klasses;

    49   GrowableArray<ciInstance*>* _unloaded_instances;

    50   GrowableArray<ciReturnAddress*>* _return_addresses;

    51   int                       _next_ident;

    53 public:

    54   struct NonPermObject : public ResourceObj {

    55     ciObject*      _object;

    56     NonPermObject* _next;

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

    59     ciObject*     object()  { return _object; }

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

    61   };

    62 private:

    63   enum { NON_PERM_BUCKETS = 61 };

    64   NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];

    65   int _non_perm_count;

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

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

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

    70   ciObject* create_new_object(oop o);

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

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

    73   }

    75   NonPermObject* &find_non_perm(oop key);

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

    78   void init_ident_of(ciObject* obj);

    80   Arena* arena() { return _arena; }

    82   void print_contents_impl();

    84   ciInstance* get_unloaded_instance(ciInstanceKlass* klass);

    86 public:

    87   static bool is_initialized() { return _initialized; }

    89   static void initialize();

    90   void init_shared_objects();

    92   ciObjectFactory(Arena* arena, int expected_size);

    95   // Get the ciObject corresponding to some oop.

    96   ciObject* get(oop key);

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

    99   static ciSymbol* vm_symbol_at(int index);

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

   102   ciMethod* get_unloaded_method(ciInstanceKlass* holder,

   103                                 ciSymbol*        name,

   104                                 ciSymbol*        signature);

   106   // Get a ciKlass representing an unloaded klass.

   107   ciKlass* get_unloaded_klass(ciKlass* accessing_klass,

   108                               ciSymbol* name,

   109                               bool create_if_not_found);

   111   // Get a ciInstance representing an unresolved klass mirror.

   112   ciInstance* get_unloaded_klass_mirror(ciKlass* type);

   114   // Get a ciInstance representing an unresolved method handle constant.

   115   ciInstance* get_unloaded_method_handle_constant(ciKlass*  holder,

   116                                                   ciSymbol* name,

   117                                                   ciSymbol* signature,

   118                                                   int       ref_kind);

   120   // Get a ciInstance representing an unresolved method type constant.

   121   ciInstance* get_unloaded_method_type_constant(ciSymbol* signature);

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

   125   // with none.

   126   ciMethodData* get_empty_methodData();

   128   ciReturnAddress* get_return_address(int bci);

   130   void print_contents();

   131   void print();

   132 };

   134 #endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP

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