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