jdk8-mips64-public/hotspot: src/share/vm/classfile/resolutionErrors.cpp@a61af66fc99e

     1 /*

     2  * Copyright 2005 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 # include "incls/_precompiled.incl"

    26 # include "incls/_resolutionErrors.cpp.incl"

    28 // add new entry to the table

    29 void ResolutionErrorTable::add_entry(int index, unsigned int hash,

    30                                      constantPoolHandle pool, int cp_index, symbolHandle error)

    31 {

    32   assert_locked_or_safepoint(SystemDictionary_lock);

    33   assert(!pool.is_null() && !error.is_null(), "adding NULL obj");

    35   ResolutionErrorEntry* entry = new_entry(hash, pool(), cp_index, error());

    36   add_entry(index, entry);

    37 }

    39 // find entry in the table

    40 ResolutionErrorEntry* ResolutionErrorTable::find_entry(int index, unsigned int hash,

    41                                                        constantPoolHandle pool, int cp_index)

    42 {

    43   assert_locked_or_safepoint(SystemDictionary_lock);

    45   for (ResolutionErrorEntry *error_probe = bucket(index);

    46                          error_probe != NULL;

    47                          error_probe = error_probe->next()) {

    48   if (error_probe->hash() == hash && error_probe->pool() == pool()) {

    49       return error_probe;;

    50     }

    51   }

    52   return NULL;

    53 }

    55 // create new error entry

    56 ResolutionErrorEntry* ResolutionErrorTable::new_entry(int hash, constantPoolOop pool,

    57                                                       int cp_index, symbolOop error)

    58 {

    59   ResolutionErrorEntry* entry = (ResolutionErrorEntry*)Hashtable::new_entry(hash, pool);

    60   entry->set_cp_index(cp_index);

    61   entry->set_error(error);

    63   return entry;

    64 }

    66 // create resolution error table

    67 ResolutionErrorTable::ResolutionErrorTable(int table_size)

    68     : Hashtable(table_size, sizeof(ResolutionErrorEntry)) {

    69 }

    71 // GC support

    72 void ResolutionErrorTable::oops_do(OopClosure* f) {

    73   for (int i = 0; i < table_size(); i++) {

    74     for (ResolutionErrorEntry* probe = bucket(i);

    75                            probe != NULL;

    76                            probe = probe->next()) {

    77       assert(probe->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");

    78       assert(probe->error() != (symbolOop)NULL, "resolution error table is corrupt");

    79       probe->oops_do(f);

    80     }

    81   }

    82 }

    84 // GC support

    85 void ResolutionErrorEntry::oops_do(OopClosure* blk) {

    86   blk->do_oop((oop*)pool_addr());

    87   blk->do_oop((oop*)error_addr());

    88 }

    90 // We must keep the symbolOop used in the error alive. The constantPoolOop will

    91 // decide when the entry can be purged.

    92 void ResolutionErrorTable::always_strong_classes_do(OopClosure* blk) {

    93   for (int i = 0; i < table_size(); i++) {

    94     for (ResolutionErrorEntry* probe = bucket(i);

    95                            probe != NULL;

    96                            probe = probe->next()) {

    97       assert(probe->error() != (symbolOop)NULL, "resolution error table is corrupt");

    98       blk->do_oop((oop*)probe->error_addr());

    99     }

   100   }

   101 }

   103 // Remove unloaded entries from the table

   104 void ResolutionErrorTable::purge_resolution_errors(BoolObjectClosure* is_alive) {

   105   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint")

   106   for (int i = 0; i < table_size(); i++) {

   107     for (ResolutionErrorEntry** p = bucket_addr(i); *p != NULL; ) {

   108       ResolutionErrorEntry* entry = *p;

   109       assert(entry->pool() != (constantPoolOop)NULL, "resolution error table is corrupt");

   110       constantPoolOop pool = entry->pool();

   111       if (is_alive->do_object_b(pool)) {

   112         p = entry->next_addr();

   113       } else {

   114         *p = entry->next();

   115         free_entry(entry);

   116       }

   117     }

   118   }

   119 }

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