1 /*

     2  * Copyright (c) 2001, 2015, 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  */

    24 

    25 #include "precompiled.hpp"

    26 #include "gc/serial/defNewGeneration.hpp"

    27 #include "gc/serial/tenuredGeneration.hpp"

    28 #include "gc/shared/genRemSet.hpp"

    29 #include "gc/shared/generationSpec.hpp"

    30 #include "memory/binaryTreeDictionary.hpp"

    31 #include "memory/filemap.hpp"

    32 #include "runtime/java.hpp"

    33 #include "utilities/macros.hpp"

    34 #if INCLUDE_ALL_GCS

    35 #include "gc/cms/concurrentMarkSweepGeneration.hpp"

    36 #include "gc/cms/parNewGeneration.hpp"

    37 #endif // INCLUDE_ALL_GCS

    38 

    39 Generation* GenerationSpec::init(ReservedSpace rs, int level,

    40                                  GenRemSet* remset) {

    41   switch (name()) {

    42     case Generation::DefNew:

    43       return new DefNewGeneration(rs, init_size(), level);

    44 

    45     case Generation::MarkSweepCompact:

    46       return new TenuredGeneration(rs, init_size(), level, remset);

    47 

    48 #if INCLUDE_ALL_GCS

    49     case Generation::ParNew:

    50       return new ParNewGeneration(rs, init_size(), level);

    51 

    52     case Generation::ConcurrentMarkSweep: {

    53       assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");

    54       CardTableRS* ctrs = remset->as_CardTableRS();

    55       if (ctrs == NULL) {

    56         vm_exit_during_initialization("Rem set incompatibility.");

    57       }

    58       // Otherwise

    59       // The constructor creates the CMSCollector if needed,

    60       // else registers with an existing CMSCollector

    61 

    62       ConcurrentMarkSweepGeneration* g = NULL;

    63       g = new ConcurrentMarkSweepGeneration(rs,

    64                  init_size(), level, ctrs, UseCMSAdaptiveFreeLists,

    65                  (FreeBlockDictionary<FreeChunk>::DictionaryChoice)CMSDictionaryChoice);

    66 

    67       g->initialize_performance_counters();

    68 

    69       return g;

    70     }

    71 #endif // INCLUDE_ALL_GCS

    72 

    73     default:

    74       guarantee(false, "unrecognized GenerationName");

    75       return NULL;

    76   }

    77 }