hotspot/src/share/vm/memory/generationSpec.cpp
author coleenp
Sat, 01 Sep 2012 13:25:18 -0400
changeset 13728 882756847a04
parent 12507 6182ca66bc7b
child 15482 470d0b0c09f1
permissions -rw-r--r--
6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

/*
 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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#include "precompiled.hpp"
#include "memory/binaryTreeDictionary.hpp"
#include "memory/defNewGeneration.hpp"
#include "memory/filemap.hpp"
#include "memory/genRemSet.hpp"
#include "memory/generationSpec.hpp"
#include "memory/tenuredGeneration.hpp"
#include "runtime/java.hpp"
#ifndef SERIALGC
#include "gc_implementation/parNew/asParNewGeneration.hpp"
#include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp"
#include "gc_implementation/parNew/parNewGeneration.hpp"
#endif

Generation* GenerationSpec::init(ReservedSpace rs, int level,
                                 GenRemSet* remset) {
  switch (name()) {
    case Generation::DefNew:
      return new DefNewGeneration(rs, init_size(), level);

    case Generation::MarkSweepCompact:
      return new TenuredGeneration(rs, init_size(), level, remset);

#ifndef SERIALGC
    case Generation::ParNew:
      return new ParNewGeneration(rs, init_size(), level);

    case Generation::ASParNew:
      return new ASParNewGeneration(rs,
                                    init_size(),
                                    init_size() /* min size */,
                                    level);

    case Generation::ConcurrentMarkSweep: {
      assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
      CardTableRS* ctrs = remset->as_CardTableRS();
      if (ctrs == NULL) {
        vm_exit_during_initialization("Rem set incompatibility.");
      }
      // Otherwise
      // The constructor creates the CMSCollector if needed,
      // else registers with an existing CMSCollector

      ConcurrentMarkSweepGeneration* g = NULL;
      g = new ConcurrentMarkSweepGeneration(rs,
                 init_size(), level, ctrs, UseCMSAdaptiveFreeLists,
                 (FreeBlockDictionary<FreeChunk>::DictionaryChoice)CMSDictionaryChoice);

      g->initialize_performance_counters();

      return g;
    }

    case Generation::ASConcurrentMarkSweep: {
      assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
      CardTableRS* ctrs = remset->as_CardTableRS();
      if (ctrs == NULL) {
        vm_exit_during_initialization("Rem set incompatibility.");
      }
      // Otherwise
      // The constructor creates the CMSCollector if needed,
      // else registers with an existing CMSCollector

      ASConcurrentMarkSweepGeneration* g = NULL;
      g = new ASConcurrentMarkSweepGeneration(rs,
                 init_size(), level, ctrs, UseCMSAdaptiveFreeLists,
                 (FreeBlockDictionary<FreeChunk>::DictionaryChoice)CMSDictionaryChoice);

      g->initialize_performance_counters();

      return g;
    }
#endif // SERIALGC

    default:
      guarantee(false, "unrecognized GenerationName");
      return NULL;
  }
}