jdk8-mips64-public/hotspot: src/share/vm/classfile/resolutionErrors.hpp@2c6ef90f030a

8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com

     1 /*

     2  * Copyright (c) 2005, 2012, 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_CLASSFILE_RESOLUTIONERRORS_HPP

    26 #define SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP

    28 #include "oops/constantPool.hpp"

    29 #include "utilities/hashtable.hpp"

    31 class ResolutionErrorEntry;

    33 // ResolutionError objects are used to record errors encountered during

    34 // constant pool resolution (JVMS 5.4.3).

    36 class ResolutionErrorTable : public Hashtable<ConstantPool*, mtClass> {

    38 public:

    39   ResolutionErrorTable(int table_size);

    41   ResolutionErrorEntry* new_entry(int hash, ConstantPool* pool, int cp_index, Symbol* error);

    42   void free_entry(ResolutionErrorEntry *entry);

    44   ResolutionErrorEntry* bucket(int i) {

    45     return (ResolutionErrorEntry*)Hashtable<ConstantPool*, mtClass>::bucket(i);

    46   }

    48   ResolutionErrorEntry** bucket_addr(int i) {

    49     return (ResolutionErrorEntry**)Hashtable<ConstantPool*, mtClass>::bucket_addr(i);

    50   }

    52   void add_entry(int index, ResolutionErrorEntry* new_entry) {

    53     Hashtable<ConstantPool*, mtClass>::add_entry(index,

    54       (HashtableEntry<ConstantPool*, mtClass>*)new_entry);

    55   }

    57   void add_entry(int index, unsigned int hash,

    58                  constantPoolHandle pool, int which, Symbol* error);

    61   // find error given the constant pool and constant pool index

    62   ResolutionErrorEntry* find_entry(int index, unsigned int hash,

    63                                    constantPoolHandle pool, int cp_index);

    66   unsigned int compute_hash(constantPoolHandle pool, int cp_index) {

    67     return (unsigned int) pool->identity_hash() + cp_index;

    68   }

    70   // purges unloaded entries from the table

    71   void purge_resolution_errors();

    73   // RedefineClasses support - remove obsolete constant pool entry

    74   void delete_entry(ConstantPool* c);

    75 };

    78 class ResolutionErrorEntry : public HashtableEntry<ConstantPool*, mtClass> {

    79  private:

    80   int               _cp_index;

    81   Symbol*           _error;

    83  public:

    84   ConstantPool*      pool() const               { return (ConstantPool*)literal(); }

    85   ConstantPool**   pool_addr()                { return (ConstantPool**)literal_addr(); }

    87   int                cp_index() const           { return _cp_index; }

    88   void               set_cp_index(int cp_index) { _cp_index = cp_index; }

    90   Symbol*            error() const              { return _error; }

    91   void               set_error(Symbol* e);

    93   ResolutionErrorEntry* next() const {

    94     return (ResolutionErrorEntry*)HashtableEntry<ConstantPool*, mtClass>::next();

    95   }

    97   ResolutionErrorEntry** next_addr() {

    98     return (ResolutionErrorEntry**)HashtableEntry<ConstantPool*, mtClass>::next_addr();

    99   }

   100 };

   102 #endif // SHARE_VM_CLASSFILE_RESOLUTIONERRORS_HPP

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

src/share/vm/classfile/resolutionErrors.hpp@2c6ef90f030a

src/share/vm/classfile/resolutionErrors.hpp