1 /*
   2  * Copyright (c) 2017, 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/serialHeap.hpp"
  28 #include "gc/shared/genMemoryPools.hpp"
  29 #include "gc/shared/generationSpec.hpp"
  30 #include "gc/shared/gcPolicyCounters.hpp"
  31 #include "services/memoryManager.hpp"
  32 
  33 SerialHeap::SerialHeap(const SerialSettings& settings) :
  34     GenCollectedHeap(settings,
  35                      Generation::DefNew,
  36                      Generation::MarkSweepCompact),
  37     _settings(settings),
  38     _eden_pool(NULL),
  39     _survivor_pool(NULL),
  40     _old_pool(NULL) {
  41   _young_manager = new GCMemoryManager("Copy", "end of minor GC");
  42   _old_manager = new GCMemoryManager("MarkSweepCompact", "end of major GC");
  43 }
  44 
  45 void SerialHeap::initialize_serviceability() {
  46 
  47   DefNewGeneration* young = (DefNewGeneration*) young_gen();
  48 
  49   // Add a memory pool for each space and young gen doesn't
  50   // support low memory detection as it is expected to get filled up.
  51   _eden_pool = new ContiguousSpacePool(young->eden(),
  52                                        "Eden Space",
  53                                        young->max_eden_size(),
  54                                        false /* support_usage_threshold */);
  55   _survivor_pool = new SurvivorContiguousSpacePool(young,
  56                                                    "Survivor Space",
  57                                                    young->max_survivor_size(),
  58                                                    false /* support_usage_threshold */);
  59   Generation* old = old_gen();
  60   _old_pool = new GenerationPool(old, "Tenured Gen", true);
  61 
  62   _young_manager->add_pool(_eden_pool);
  63   _young_manager->add_pool(_survivor_pool);
  64   young->set_gc_manager(_young_manager);
  65 
  66   _old_manager->add_pool(_eden_pool);
  67   _old_manager->add_pool(_survivor_pool);
  68   _old_manager->add_pool(_old_pool);
  69   old->set_gc_manager(_old_manager);
  70 
  71 }
  72 
  73 void SerialHeap::initialize_gc_policy_counters() {
  74   initialize_gc_policy_counters_helper("Copy:MSC");
  75 }
  76 
  77 void SerialHeap::check_gen_kinds() {
  78   assert(young_gen()->kind() == Generation::DefNew,
  79          "Wrong youngest generation type");
  80   assert(old_gen()->kind() == Generation::MarkSweepCompact,
  81          "Wrong generation kind");
  82 }
  83 
  84 GrowableArray<GCMemoryManager*> SerialHeap::memory_managers() {
  85   GrowableArray<GCMemoryManager*> memory_managers(2);
  86   memory_managers.append(_young_manager);
  87   memory_managers.append(_old_manager);
  88   return memory_managers;
  89 }
  90 
  91 GrowableArray<MemoryPool*> SerialHeap::memory_pools() {
  92   GrowableArray<MemoryPool*> memory_pools(3);
  93   memory_pools.append(_eden_pool);
  94   memory_pools.append(_survivor_pool);
  95   memory_pools.append(_old_pool);
  96   return memory_pools;
  97 }